diff options
| author | Jeremy Allison <jra@samba.org> | 2005-12-06 23:09:01 +0000 |
|---|---|---|
| committer | Gerald (Jerry) Carter <jerry@samba.org> | 2007-10-10 11:05:45 -0500 |
| commit | ba10b979564b782bc0a9729ed6a9e6bcaa1687a8 (patch) | |
| tree | d11e4586c7612632616b243f7323b3f622a833a6 /source3 | |
| parent | 83b987befdbba857131102700d237728784b6f69 (diff) | |
| download | samba-ba10b979564b782bc0a9729ed6a9e6bcaa1687a8.tar.gz samba-ba10b979564b782bc0a9729ed6a9e6bcaa1687a8.tar.bz2 samba-ba10b979564b782bc0a9729ed6a9e6bcaa1687a8.zip | |
r12110: We're using a tdb-based wins backend now. Thanks to the
ubiqx code, which has served us well for many a year..
"Well done, thou good and faithful servant".
Jeremy.
(This used to be commit 32380002e44766669b28621e62a0b74652b1798f)
Diffstat (limited to 'source3')
| -rw-r--r-- | source3/ubiqx/COPYING.LIB | 481 | ||||
| -rw-r--r-- | source3/ubiqx/README.UBI | 18 | ||||
| -rw-r--r-- | source3/ubiqx/debugparse.c | 308 | ||||
| -rw-r--r-- | source3/ubiqx/debugparse.h | 127 | ||||
| -rw-r--r-- | source3/ubiqx/sys_include.h | 52 | ||||
| -rw-r--r-- | source3/ubiqx/ubi_BinTree.c | 1172 | ||||
| -rw-r--r-- | source3/ubiqx/ubi_BinTree.h | 887 | ||||
| -rw-r--r-- | source3/ubiqx/ubi_Cache.c | 505 | ||||
| -rw-r--r-- | source3/ubiqx/ubi_Cache.h | 412 | ||||
| -rw-r--r-- | source3/ubiqx/ubi_SplayTree.c | 512 | ||||
| -rw-r--r-- | source3/ubiqx/ubi_SplayTree.h | 377 | ||||
| -rw-r--r-- | source3/ubiqx/ubi_dLinkList.c | 171 | ||||
| -rw-r--r-- | source3/ubiqx/ubi_dLinkList.h | 242 | ||||
| -rw-r--r-- | source3/ubiqx/ubi_sLinkList.c | 187 | ||||
| -rw-r--r-- | source3/ubiqx/ubi_sLinkList.h | 254 |
15 files changed, 0 insertions, 5705 deletions
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The main distribution, which contains -additional available modules, can be found at: - - http://www.interads.co.uk/~crh/ubiqx/ - -Chris Hertel -Samba Team -ubiqx@ubiqx.mn.org diff --git a/source3/ubiqx/debugparse.c b/source3/ubiqx/debugparse.c deleted file mode 100644 index c5fe3e2ee8..0000000000 --- a/source3/ubiqx/debugparse.c +++ /dev/null @@ -1,308 +0,0 @@ -/* ========================================================================== ** - * debugparse.c - * - * Copyright (C) 1998 by Christopher R. Hertel - * - * Email: crh@ubiqx.mn.org - * - * -------------------------------------------------------------------------- ** - * This module is a very simple parser for Samba debug log files. - * -------------------------------------------------------------------------- ** - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Library General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Library General Public License for more details. - * - * You should have received a copy of the GNU Library General Public - * License along with this library; if not, write to the Free - * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - * - * -------------------------------------------------------------------------- ** - * The important function in this module is dbg_char2token(). The rest is - * basically fluff. (Potentially useful fluff, but still fluff.) - * ========================================================================== ** - */ - -#include "debugparse.h" - -/* -------------------------------------------------------------------------- ** - * Constants... - * - * DBG_BSIZE - This internal constant is used only by dbg_test(). It is the - * size of the read buffer. I've tested the function using a - * DBG_BSIZE value of 2. - */ - -#define DBG_BSIZE 128 - -/* -------------------------------------------------------------------------- ** - * Functions... - */ - -const char *dbg_token2string( dbg_Token tok ) - /* ------------------------------------------------------------------------ ** - * Given a token, return a string describing the token. - * - * Input: tok - One of the set of dbg_Tokens defined in debugparse.h. - * - * Output: A string identifying the token. This is useful for debugging, - * etc. - * - * Note: If the token is not known, this function will return the - * string "<unknown>". - * - * ------------------------------------------------------------------------ ** - */ - { - switch( tok ) - { - case dbg_null: - return( "null" ); - case dbg_ignore: - return( "ignore" ); - case dbg_header: - return( "header" ); - case dbg_timestamp: - return( "time stamp" ); - case dbg_level: - return( "level" ); - case dbg_sourcefile: - return( "source file" ); - case dbg_function: - return( "function" ); - case dbg_lineno: - return( "line number" ); - case dbg_message: - return( "message" ); - case dbg_eof: - return( "[EOF]" ); - } - return( "<unknown>" ); - } /* dbg_token2string */ - -dbg_Token dbg_char2token( dbg_Token *state, int c ) - /* ------------------------------------------------------------------------ ** - * Parse input one character at a time. - * - * Input: state - A pointer to a token variable. This is used to - * maintain the parser state between calls. For - * each input stream, you should set up a separate - * state variable and initialize it to dbg_null. - * Pass a pointer to it into this function with each - * character in the input stream. See dbg_test() - * for an example. - * c - The "current" character in the input stream. - * - * Output: A token. - * The token value will change when delimiters are found, - * which indicate a transition between syntactical objects. - * Possible return values are: - * - * dbg_null - The input character was an end-of-line. - * This resets the parser to its initial state - * in preparation for parsing the next line. - * dbg_eof - Same as dbg_null, except that the character - * was an end-of-file. - * dbg_ignore - Returned for whitespace and delimiters. - * These lexical tokens are only of interest - * to the parser. - * dbg_header - Indicates the start of a header line. The - * input character was '[' and was the first on - * the line. - * dbg_timestamp - Indicates that the input character was part - * of a header timestamp. - * dbg_level - Indicates that the input character was part - * of the debug-level value in the header. - * dbg_sourcefile - Indicates that the input character was part - * of the sourcefile name in the header. - * dbg_function - Indicates that the input character was part - * of the function name in the header. - * dbg_lineno - Indicates that the input character was part - * of the DEBUG call line number in the header. - * dbg_message - Indicates that the input character was part - * of the DEBUG message text. - * - * ------------------------------------------------------------------------ ** - */ - { - /* The terminating characters that we see will greatly depend upon - * how they are read. For example, if gets() is used instead of - * fgets(), then we will not see newline characters. A lot also - * depends on the calling function, which may handle terminators - * itself. - * - * '\n', '\0', and EOF are all considered line terminators. The - * dbg_eof token is sent back if an EOF is encountered. - * - * Warning: only allow the '\0' character to be sent if you are - * using gets() to read whole lines (thus replacing '\n' - * with '\0'). Sending '\0' at the wrong time will mess - * up the parsing. - */ - switch( c ) - { - case EOF: - *state = dbg_null; /* Set state to null (initial state) so */ - return( dbg_eof ); /* that we can restart with new input. */ - case '\n': - case '\0': - *state = dbg_null; /* A newline or eoln resets to the null state. */ - return( dbg_null ); - } - - /* When within the body of the message, only a line terminator - * can cause a change of state. We've already checked for line - * terminators, so if the current state is dbg_msgtxt, simply - * return that as our current token. - */ - if( dbg_message == *state ) - return( dbg_message ); - - /* If we are at the start of a new line, and the input character - * is an opening bracket, then the line is a header line, otherwise - * it's a message body line. - */ - if( dbg_null == *state ) - { - if( '[' == c ) - { - *state = dbg_timestamp; - return( dbg_header ); - } - *state = dbg_message; - return( dbg_message ); - } - - /* We've taken care of terminators, text blocks and new lines. - * The remaining possibilities are all within the header line - * itself. - */ - - /* Within the header line, whitespace can be ignored *except* - * within the timestamp. - */ - if( isspace( c ) ) - { - /* Fudge. The timestamp may contain space characters. */ - if( (' ' == c) && (dbg_timestamp == *state) ) - return( dbg_timestamp ); - /* Otherwise, ignore whitespace. */ - return( dbg_ignore ); - } - - /* Okay, at this point we know we're somewhere in the header. - * Valid header *states* are: dbg_timestamp, dbg_level, - * dbg_sourcefile, dbg_function, and dbg_lineno. - */ - switch( c ) - { - case ',': - if( dbg_timestamp == *state ) - { - *state = dbg_level; - return( dbg_ignore ); - } - break; - case ']': - if( dbg_level == *state ) - { - *state = dbg_sourcefile; - return( dbg_ignore ); - } - break; - case ':': - if( dbg_sourcefile == *state ) - { - *state = dbg_function; - return( dbg_ignore ); - } - break; - case '(': - if( dbg_function == *state ) - { - *state = dbg_lineno; - return( dbg_ignore ); - } - break; - case ')': - if( dbg_lineno == *state ) - { - *state = dbg_null; - return( dbg_ignore ); - } - break; - } - - /* If the previous block did not result in a state change, then - * return the current state as the current token. - */ - return( *state ); - } /* dbg_char2token */ - -void dbg_test( void ) - /* ------------------------------------------------------------------------ ** - * Simple test function. - * - * Input: none. - * Output: none. - * Notes: This function was used to test dbg_char2token(). It reads a - * Samba log file from stdin and prints parsing info to stdout. - * It also serves as a simple example. - * - * ------------------------------------------------------------------------ ** - */ - { - char bufr[DBG_BSIZE]; - int i; - int linecount = 1; - dbg_Token old = dbg_null, - newtok= dbg_null, - state = dbg_null; - - while( fgets( bufr, DBG_BSIZE, stdin ) ) - { - for( i = 0; bufr[i]; i++ ) - { - old = newtok; - newtok = dbg_char2token( &state, bufr[i] ); - switch( newtok ) - { - case dbg_header: - if( linecount > 1 ) - (void)putchar( '\n' ); - break; - case dbg_null: - linecount++; - break; - case dbg_ignore: - break; - default: - if( old != newtok ) - (void)printf( "\n[%05d]%12s: ", linecount, dbg_token2string(newtok) ); - (void)putchar( bufr[i] ); - } - } - } - (void)putchar( '\n' ); - } /* dbg_test */ - - -/* -------------------------------------------------------------------------- ** - * This simple main line can be uncommented and used to test the parser. - */ - -/* - * int main( void ) - * { - * dbg_test(); - * return( 0 ); - * } - */ - -/* ========================================================================== */ diff --git a/source3/ubiqx/debugparse.h b/source3/ubiqx/debugparse.h deleted file mode 100644 index 458eee7455..0000000000 --- a/source3/ubiqx/debugparse.h +++ /dev/null @@ -1,127 +0,0 @@ -#ifndef DEBUGPARSE_H -#define DEBUGPARSE_H -/* ========================================================================== ** - * debugparse.c - * - * Copyright (C) 1998 by Christopher R. Hertel - * - * Email: crh@ubiqx.mn.org - * - * -------------------------------------------------------------------------- ** - * This module is a very simple parser for Samba debug log files. - * -------------------------------------------------------------------------- ** - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Library General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Library General Public License for more details. - * - * You should have received a copy of the GNU Library General Public - * License along with this library; if not, write to the Free - * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - * - * -------------------------------------------------------------------------- ** - * The important function in this module is dbg_char2token(). The rest is - * basically fluff. (Potentially useful fluff, but still fluff.) - * ========================================================================== ** - */ - -#include "sys_include.h" - -/* This module compiles quite nicely outside of the Samba environment. - * You'll need the following headers: -#include <ctype.h> -#include <stdio.h> -#include <string.h> - */ - -/* -------------------------------------------------------------------------- ** - * These are the tokens returned by dbg_char2token(). - */ - -typedef enum - { - dbg_null = 0, - dbg_ignore, - dbg_header, - dbg_timestamp, - dbg_level, - dbg_sourcefile, - dbg_function, - dbg_lineno, - dbg_message, - dbg_eof - } dbg_Token; - -/* -------------------------------------------------------------------------- ** - * Function prototypes... - */ - - const char *dbg_token2string( dbg_Token tok ); - /* ------------------------------------------------------------------------ ** - * Given a token, return a string describing the token. - * - * Input: tok - One of the set of dbg_Tokens defined in debugparse.h. - * - * Output: A string identifying the token. This is useful for debugging, - * etc. - * - * Note: If the token is not known, this function will return the - * string "<unknown>". - * - * ------------------------------------------------------------------------ ** - */ - - dbg_Token dbg_char2token( dbg_Token *state, int c ); - /* ------------------------------------------------------------------------ ** - * Parse input one character at a time. - * - * Input: state - A pointer to a token variable. This is used to - * maintain the parser state between calls. For - * each input stream, you should set up a separate - * state variable and initialize it to dbg_null. - * Pass a pointer to it into this function with each - * character in the input stream. See dbg_test() - * for an example. - * c - The "current" character in the input stream. - * - * Output: A token. - * The token value will change when delimiters are found, - * which indicate a transition between syntactical objects. - * Possible return values are: - * - * dbg_null - The input character was an end-of-line. - * This resets the parser to its initial state - * in preparation for parsing the next line. - * dbg_eof - Same as dbg_null, except that the character - * was an end-of-file. - * dbg_ignore - Returned for whitespace and delimiters. - * These lexical tokens are only of interest - * to the parser. - * dbg_header - Indicates the start of a header line. The - * input character was '[' and was the first on - * the line. - * dbg_timestamp - Indicates that the input character was part - * of a header timestamp. - * dbg_level - Indicates that the input character was part - * of the debug-level value in the header. - * dbg_sourcefile - Indicates that the input character was part - * of the sourcefile name in the header. - * dbg_function - Indicates that the input character was part - * of the function name in the header. - * dbg_lineno - Indicates that the input character was part - * of the DEBUG call line number in the header. - * dbg_message - Indicates that the input character was part - * of the DEBUG message text. - * - * ------------------------------------------------------------------------ ** - */ - - -/* -------------------------------------------------------------------------- */ -#endif /* DEBUGPARSE_H */ diff --git a/source3/ubiqx/sys_include.h b/source3/ubiqx/sys_include.h deleted file mode 100644 index 8ff270afe8..0000000000 --- a/source3/ubiqx/sys_include.h +++ /dev/null @@ -1,52 +0,0 @@ -#ifndef SYS_INCLUDE_H -#define SYS_INCLUDE_H -/* ========================================================================== ** - * sys_include.h - * - * Copyright (C) 1998 by Christopher R. Hertel - * - * Email: crh@ubiqx.mn.org - * -------------------------------------------------------------------------- ** - * This header provides system declarations and data types used internally - * by the ubiqx modules. - * -------------------------------------------------------------------------- ** - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Library General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Library General Public License for more details. - * - * You should have received a copy of the GNU Library General Public - * License along with this library; if not, write to the Free - * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - * - * -------------------------------------------------------------------------- ** - * - * Samba version of sys_include.h - * - * ========================================================================== ** - */ - -#ifndef _INCLUDES_H - -/* Block the inclusion of some Samba headers so that ubiqx types won't be - * used before the headers that define them. These headers are not needed - * in the ubiqx modules anyway. - */ -#define _PROTO_H_ -#define _NAMESERV_H_ -#define _HASH_H_ - -/* The main Samba system-adaptive header file. - */ -#include "includes.h" - -#endif /* _INCLUDES_H */ - -/* ================================ The End ================================= */ -#endif /* SYS_INCLUDE_H */ diff --git a/source3/ubiqx/ubi_BinTree.c b/source3/ubiqx/ubi_BinTree.c deleted file mode 100644 index e452ac10dc..0000000000 --- a/source3/ubiqx/ubi_BinTree.c +++ /dev/null @@ -1,1172 +0,0 @@ -/* ========================================================================== ** - * ubi_BinTree.c - * - * Copyright (C) 1991-1998 by Christopher R. Hertel - * - * Email: crh@ubiqx.mn.org - * -------------------------------------------------------------------------- ** - * - * This module implements a simple binary tree. - * - * -------------------------------------------------------------------------- ** - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Library General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Library General Public License for more details. - * - * You should have received a copy of the GNU Library General Public - * License along with this library; if not, write to the Free - * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - * - * -------------------------------------------------------------------------- ** - * - * Log: ubi_BinTree.c,v - * Revision 4.12 2004/06/06 04:51:56 crh - * Fixed a small typo in ubi_BinTree.c (leftover testing cruft). - * Did a small amount of formatting touchup to ubi_BinTree.h. - * - * Revision 4.11 2004/06/06 03:14:09 crh - * Rewrote the ubi_btLeafNode() function. It now takes several paths in an - * effort to find a deeper leaf node. There is a small amount of extra - * overhead, but it is limited. - * - * Revision 4.10 2000/06/06 20:38:40 crh - * In the ReplaceNode() function, the old node header was being copied - * to the new node header using a byte-by-byte copy. This was causing - * the 'insure' software testing program to report a memory leak. The - * fix was to do a simple assignement: *newnode = *oldnode; - * This quieted the (errant) memory leak reports and is probably a bit - * faster than the bytewise copy. - * - * Revision 4.9 2000/01/08 23:24:30 crh - * Clarified a variety of if( pointer ) lines, replacing them with - * if( NULL != pointer ). This is more correct, and I have heard - * of at least one (obscure?) system out there that uses a non-zero - * value for NULL. - * Also, speed improvement in Neighbor(). It was comparing pointers - * when it could have compared two gender values. The pointer - * comparison was somewhat indirect (does pointer equal the pointer - * of the parent of the node pointed to by pointer). Urq. - * - * Revision 4.8 1999/09/22 03:40:30 crh - * Modified ubi_btTraverse() and ubi_btKillTree(). They now return an - * unsigned long indicating the number of nodes processed. The change - * is subtle. An empty tree formerly returned False, and now returns - * zero. - * - * Revision 4.7 1998/10/21 06:14:42 crh - * Fixed bugs in FirstOf() and LastOf() reported by Massimo Campostrini. - * See function comments. - * - * Revision 4.6 1998/07/25 17:02:10 crh - * Added the ubi_trNewTree() macro. - * - * Revision 4.5 1998/06/04 21:29:27 crh - * Upper-cased defined constants (eg UBI_BINTREE_H) in some header files. - * This is more "standard", and is what people expect. Weird, eh? - * - * Revision 4.4 1998/06/03 17:42:46 crh - * Further fiddling with sys_include.h. It's now in ubi_BinTree.h which is - * included by all of the binary tree files. - * - * Reminder: Some of the ubi_tr* macros in ubi_BinTree.h are redefined in - * ubi_AVLtree.h and ubi_SplayTree.h. This allows easy swapping - * of tree types by simply changing a header. Unfortunately, the - * macro redefinitions in ubi_AVLtree.h and ubi_SplayTree.h will - * conflict if used together. You must either choose a single tree - * type, or use the underlying function calls directly. Compare - * the two header files for more information. - * - * Revision 4.3 1998/06/02 01:28:43 crh - * Changed ubi_null.h to sys_include.h to make it more generic. - * - * Revision 4.2 1998/05/20 04:32:36 crh - * The C file now includes ubi_null.h. See ubi_null.h for more info. - * Also, the balance and gender fields of the node were declared as - * signed char. As I understand it, at least one SunOS or Solaris - * compiler doesn't like "signed char". The declarations were - * wrong anyway, so I changed them to simple "char". - * - * Revision 4.1 1998/03/31 06:11:57 crh - * Thomas Aglassinger sent E'mail pointing out errors in the - * dereferencing of function pointers, and a missing typecast. - * Thanks, Thomas! - * - * Revision 4.0 1998/03/10 03:19:22 crh - * Added the AVL field 'balance' to the ubi_btNode structure. This means - * that all BinTree modules now use the same basic node structure, which - * greatly simplifies the AVL module. - * Decided that this was a big enough change to justify a new major revision - * number. 3.0 was an error, so we're at 4.0. - * - * Revision 2.6 1998/01/24 06:27:46 crh - * Added ubi_trCount() macro. - * - * Revision 2.5 1997/12/23 03:56:29 crh - * In this version, all constants & macros defined in the header file have - * the ubi_tr prefix. Also cleaned up anything that gcc complained about - * when run with '-pedantic -fsyntax-only -Wall'. - * - * Revision 2.4 1997/07/26 04:11:10 crh - * + Just to be annoying I changed ubi_TRUE and ubi_FALSE to ubi_trTRUE - * and ubi_trFALSE. - * + There is now a type ubi_trBool to go with ubi_trTRUE and ubi_trFALSE. - * + There used to be something called "ubi_TypeDefs.h". I got rid of it. - * + Added function ubi_btLeafNode(). - * - * Revision 2.3 1997/06/03 05:16:17 crh - * Changed TRUE and FALSE to ubi_TRUE and ubi_FALSE to avoid conflicts. - * Also changed the interface to function InitTree(). See the comments - * for this function for more information. - * - * Revision 2.2 1995/10/03 22:00:07 CRH - * Ubisized! - * - * Revision 2.1 95/03/09 23:37:10 CRH - * Added the ModuleID static string and function. These modules are now - * self-identifying. - * - * Revision 2.0 95/02/27 22:00:17 CRH - * Revision 2.0 of this program includes the following changes: - * - * 1) A fix to a major typo in the RepaceNode() function. - * 2) The addition of the static function Border(). - * 3) The addition of the public functions FirstOf() and LastOf(), which - * use Border(). These functions are used with trees that allow - * duplicate keys. - * 4) A complete rewrite of the Locate() function. Locate() now accepts - * a "comparison" operator. - * 5) Overall enhancements to both code and comments. - * - * I decided to give this a new major rev number because the interface has - * changed. In particular, there are two new functions, and changes to the - * Locate() function. - * - * Revision 1.0 93/10/15 22:44:59 CRH - * With this revision, I have added a set of #define's that provide a single, - * standard API to all existing tree modules. Until now, each of the three - * existing modules had a different function and typedef prefix, as follows: - * - * Module Prefix - * ubi_BinTree ubi_bt - * ubi_AVLtree ubi_avl - * ubi_SplayTree ubi_spt - * - * To further complicate matters, only those portions of the base module - * (ubi_BinTree) that were superceeded in the new module had the new names. - * For example, if you were using ubi_SplayTree, the locate function was - * called "ubi_sptLocate", but the next and previous functions remained - * "ubi_btNext" and "ubi_btPrev". - * - * This was not too terrible if you were familiar with the modules and knew - * exactly which tree model you wanted to use. If you wanted to be able to - * change modules (for speed comparisons, etc), things could get messy very - * quickly. - * - * So, I have added a set of defined names that get redefined in any of the - * descendant modules. To use this standardized interface in your code, - * simply replace all occurances of "ubi_bt", "ubi_avl", and "ubi_spt" with - * "ubi_tr". The "ubi_tr" names will resolve to the correct function or - * datatype names for the module that you are using. Just remember to - * include the header for that module in your program file. Because these - * names are handled by the preprocessor, there is no added run-time - * overhead. - * - * Note that the original names do still exist, and can be used if you wish - * to write code directly to a specific module. This should probably only be - * done if you are planning to implement a new descendant type, such as - * red/black trees. CRH - * - * V0.0 - June, 1991 - Written by Christopher R. Hertel (CRH). - * - * ========================================================================== ** - */ - -#include "ubi_BinTree.h" /* Header for this module. */ - - -/* ========================================================================== ** - * Static data. - */ - -static char ModuleID[] = "ubi_BinTree\n\ -\tRevision: 4.12\n\ -\tDate: 2004/06/06 04:51:56\n\ -\tAuthor: crh\n"; - -/* ========================================================================== ** - * Internal (private) functions. - */ - -static ubi_btNodePtr qFind( ubi_btCompFunc cmp, - ubi_btItemPtr FindMe, - register ubi_btNodePtr p ) - /* ------------------------------------------------------------------------ ** - * This function performs a non-recursive search of a tree for a node - * matching a specific key. It is called "qFind()" because it is - * faster that TreeFind (below). - * - * Input: - * cmp - a pointer to the tree's comparison function. - * FindMe - a pointer to the key value for which to search. - * p - a pointer to the starting point of the search. <p> - * is considered to be the root of a subtree, and only - * the subtree will be searched. - * - * Output: - * A pointer to a node with a key that matches the key indicated by - * FindMe, or NULL if no such node was found. - * - * Note: In a tree that allows duplicates, the pointer returned *might - * not* point to the (sequentially) first occurance of the - * desired key. - * ------------------------------------------------------------------------ ** - */ - { - int tmp; - - while( (NULL != p) - && ((tmp = ubi_trAbNormal( (*cmp)(FindMe, p) )) != ubi_trEQUAL) ) - p = p->Link[tmp]; - - return( p ); - } /* qFind */ - -static ubi_btNodePtr TreeFind( ubi_btItemPtr findme, - ubi_btNodePtr p, - ubi_btNodePtr *parentp, - char *gender, - ubi_btCompFunc CmpFunc ) - /* ------------------------------------------------------------------------ ** - * TreeFind() searches a tree for a given value (findme). It will return a - * pointer to the target node, if found, or NULL if the target node was not - * found. - * - * TreeFind() also returns, via parameters, a pointer to the parent of the - * target node, and a LEFT or RIGHT value indicating which child of the - * parent is the target node. *If the target is not found*, then these - * values indicate the place at which the target *should be found*. This - * is useful when inserting a new node into a tree or searching for nodes - * "near" the target node. - * - * The parameters are: - * - * findme - is a pointer to the key information to be searched for. - * p - points to the root of the tree to be searched. - * parentp - will return a pointer to a pointer to the !parent! of the - * target node, which can be especially usefull if the target - * was not found. - * gender - returns LEFT or RIGHT to indicate which child of *parentp - * was last searched. - * CmpFunc - points to the comparison function. - * - * This function is called by ubi_btLocate() and ubi_btInsert(). - * ------------------------------------------------------------------------ ** - */ - { - register ubi_btNodePtr tmp_p = p; - ubi_btNodePtr tmp_pp = NULL; - char tmp_gender = ubi_trEQUAL; - int tmp_cmp; - - while( (NULL != tmp_p) - && (ubi_trEQUAL != (tmp_cmp = ubi_trAbNormal((*CmpFunc)(findme, tmp_p)))) ) - { - tmp_pp = tmp_p; /* Keep track of previous node. */ - tmp_gender = (char)tmp_cmp; /* Keep track of sex of child. */ - tmp_p = tmp_p->Link[tmp_cmp]; /* Go to child. */ - } - *parentp = tmp_pp; /* Return results. */ - *gender = tmp_gender; - return( tmp_p ); - } /* TreeFind */ - -static void ReplaceNode( ubi_btNodePtr *parent, - ubi_btNodePtr oldnode, - ubi_btNodePtr newnode ) - /* ------------------------------------------------------------------------ ** - * Remove node oldnode from the tree, replacing it with node newnode. - * - * Input: - * parent - A pointer to he parent pointer of the node to be - * replaced. <parent> may point to the Link[] field of - * a parent node, or it may indicate the root pointer at - * the top of the tree. - * oldnode - A pointer to the node that is to be replaced. - * newnode - A pointer to the node that is to be installed in the - * place of <*oldnode>. - * - * Notes: Don't forget to free oldnode. - * Also, this function used to have a really nasty typo - * bug. "oldnode" and "newnode" were swapped in the line - * that now reads: - * ((unsigned char *)newnode)[i] = ((unsigned char *)oldnode)[i]; - * Bleah! - * ------------------------------------------------------------------------ ** - */ - { - *newnode = *oldnode; /* Copy node internals to new node. */ - - (*parent) = newnode; /* Old node's parent points to new child. */ - /* Now tell the children about their new step-parent. */ - if( oldnode->Link[ubi_trLEFT] ) - (oldnode->Link[ubi_trLEFT])->Link[ubi_trPARENT] = newnode; - if( oldnode->Link[ubi_trRIGHT] ) - (oldnode->Link[ubi_trRIGHT])->Link[ubi_trPARENT] = newnode; - } /* ReplaceNode */ - -static void SwapNodes( ubi_btRootPtr RootPtr, - ubi_btNodePtr Node1, - ubi_btNodePtr Node2 ) - /* ------------------------------------------------------------------------ ** - * This function swaps two nodes in the tree. Node1 will take the place of - * Node2, and Node2 will fill in the space left vacant by Node 1. - * - * Input: - * RootPtr - pointer to the tree header structure for this tree. - * Node1 - \ - * > These are the two nodes which are to be swapped. - * Node2 - / - * - * Notes: - * This function does a three step swap, using a dummy node as a place - * holder. This function is used by ubi_btRemove(). - * ------------------------------------------------------------------------ ** - */ - { - ubi_btNodePtr *Parent; - ubi_btNode dummy; - ubi_btNodePtr dummy_p = &dummy; - - /* Replace Node 1 with the dummy, thus removing Node1 from the tree. */ - if( NULL != Node1->Link[ubi_trPARENT] ) - Parent = &((Node1->Link[ubi_trPARENT])->Link[(int)(Node1->gender)]); - else - Parent = &(RootPtr->root); - ReplaceNode( Parent, Node1, dummy_p ); - - /* Swap Node 1 with Node 2, placing Node 1 back into the tree. */ - if( NULL != Node2->Link[ubi_trPARENT] ) - Parent = &((Node2->Link[ubi_trPARENT])->Link[(int)(Node2->gender)]); - else - Parent = &(RootPtr->root); - ReplaceNode( Parent, Node2, Node1 ); - - /* Swap Node 2 and the dummy, thus placing Node 2 back into the tree. */ - if( NULL != dummy_p->Link[ubi_trPARENT] ) - Parent = &((dummy_p->Link[ubi_trPARENT])->Link[(int)(dummy_p->gender)]); - else - Parent = &(RootPtr->root); - ReplaceNode( Parent, dummy_p, Node2 ); - } /* SwapNodes */ - -/* -------------------------------------------------------------------------- ** - * These routines allow you to walk through the tree, forwards or backwards. - */ - -static ubi_btNodePtr SubSlide( register ubi_btNodePtr P, - register int whichway ) - /* ------------------------------------------------------------------------ ** - * Slide down the side of a subtree. - * - * Given a starting node, this function returns a pointer to the LEFT-, or - * RIGHT-most descendent, *or* (if whichway is PARENT) to the tree root. - * - * Input: P - a pointer to a starting place. - * whichway - the direction (LEFT, RIGHT, or PARENT) in which to - * travel. - * Output: A pointer to a node that is either the root, or has no - * whichway-th child but is within the subtree of P. Note that - * the return value may be the same as P. The return value *will - * be* NULL if P is NULL. - * ------------------------------------------------------------------------ ** - */ - { - - if( NULL != P ) - while( NULL != P->Link[ whichway ] ) - P = P->Link[ whichway ]; - return( P ); - } /* SubSlide */ - -static ubi_btNodePtr Neighbor( register ubi_btNodePtr P, - register int whichway ) - /* ------------------------------------------------------------------------ ** - * Given starting point p, return the (key order) next or preceeding node - * in the tree. - * - * Input: P - Pointer to our starting place node. - * whichway - the direction in which to travel to find the - * neighbor, i.e., the RIGHT neighbor or the LEFT - * neighbor. - * - * Output: A pointer to the neighboring node, or NULL if P was NULL. - * - * Notes: If whichway is PARENT, the results are unpredictable. - * ------------------------------------------------------------------------ ** - */ - { - if( P ) - { - if( NULL != P->Link[ whichway ] ) - return( SubSlide( P->Link[ whichway ], (char)ubi_trRevWay(whichway) ) ); - else - while( NULL != P->Link[ ubi_trPARENT ] ) - { - if( whichway == P->gender ) - P = P->Link[ ubi_trPARENT ]; - else - return( P->Link[ ubi_trPARENT ] ); - } - } - return( NULL ); - } /* Neighbor */ - -static ubi_btNodePtr Border( ubi_btRootPtr RootPtr, - ubi_btItemPtr FindMe, - ubi_btNodePtr p, - int whichway ) - /* ------------------------------------------------------------------------ ** - * Given starting point p, which has a key value equal to *FindMe, locate - * the first (index order) node with the same key value. - * - * This function is useful in trees that have can have duplicate keys. - * For example, consider the following tree: - * Tree Traversal - * 2 If <p> points to the root and <whichway> is RIGHT, 3 - * / \ then the return value will be a pointer to the / \ - * 2 2 RIGHT child of the root node. The tree on 2 5 - * / / \ the right shows the order of traversal. / / \ - * 1 2 3 1 4 6 - * - * Input: RootPtr - Pointer to the tree root structure. - * FindMe - Key value for comparisons. - * p - Pointer to the starting-point node. - * whichway - the direction in which to travel to find the - * neighbor, i.e., the RIGHT neighbor or the LEFT - * neighbor. - * - * Output: A pointer to the first (index, or "traversal", order) node with - * a Key value that matches *FindMe. - * - * Notes: If whichway is PARENT, or if the tree does not allow duplicate - * keys, this function will return <p>. - * ------------------------------------------------------------------------ ** - */ - { - register ubi_btNodePtr q; - - /* Exit if there's nothing that can be done. */ - if( !ubi_trDups_OK( RootPtr ) || (ubi_trPARENT == whichway) ) - return( p ); - - /* First, if needed, move up the tree. We need to get to the root of the - * subtree that contains all of the matching nodes. - */ - q = p->Link[ubi_trPARENT]; - while( (NULL != q) - && (ubi_trEQUAL == ubi_trAbNormal( (*(RootPtr->cmp))(FindMe, q) )) ) - { - p = q; - q = p->Link[ubi_trPARENT]; - } - - /* Next, move back down in the "whichway" direction. */ - q = p->Link[whichway]; - while( NULL != q ) - { - q = qFind( RootPtr->cmp, FindMe, q ); - if( q ) - { - p = q; - q = p->Link[whichway]; - } - } - return( p ); - } /* Border */ - - -/* ========================================================================== ** - * Exported utilities. - */ - -long ubi_btSgn( register long x ) - /* ------------------------------------------------------------------------ ** - * Return the sign of x; {negative,zero,positive} ==> {-1, 0, 1}. - * - * Input: x - a signed long integer value. - * - * Output: the "sign" of x, represented as follows: - * -1 == negative - * 0 == zero (no sign) - * 1 == positive - * - * Note: This utility is provided in order to facilitate the conversion - * of C comparison function return values into BinTree direction - * values: {LEFT, PARENT, EQUAL}. It is INCORPORATED into the - * ubi_trAbNormal() conversion macro! - * - * ------------------------------------------------------------------------ ** - */ - { - return( (x)?((x>0)?(1):(-1)):(0) ); - } /* ubi_btSgn */ - -ubi_btNodePtr ubi_btInitNode( ubi_btNodePtr NodePtr ) - /* ------------------------------------------------------------------------ ** - * Initialize a tree node. - * - * Input: a pointer to a ubi_btNode structure to be initialized. - * Output: a pointer to the initialized ubi_btNode structure (ie. the - * same as the input pointer). - * ------------------------------------------------------------------------ ** - */ - { - NodePtr->Link[ ubi_trLEFT ] = NULL; - NodePtr->Link[ ubi_trPARENT ] = NULL; - NodePtr->Link[ ubi_trRIGHT ] = NULL; - NodePtr->gender = ubi_trEQUAL; - NodePtr->balance = ubi_trEQUAL; - return( NodePtr ); - } /* ubi_btInitNode */ - -ubi_btRootPtr ubi_btInitTree( ubi_btRootPtr RootPtr, - ubi_btCompFunc CompFunc, - char Flags ) - /* ------------------------------------------------------------------------ ** - * Initialize the fields of a Tree Root header structure. - * - * Input: RootPtr - a pointer to an ubi_btRoot structure to be - * initialized. - * CompFunc - a pointer to a comparison function that will be used - * whenever nodes in the tree must be compared against - * outside values. - * Flags - One bytes worth of flags. Flags include - * ubi_trOVERWRITE and ubi_trDUPKEY. See the header - * file for more info. - * - * Output: a pointer to the initialized ubi_btRoot structure (ie. the - * same value as RootPtr). - * - * Note: The interface to this function has changed from that of - * previous versions. The <Flags> parameter replaces two - * boolean parameters that had the same basic effect. - * - * ------------------------------------------------------------------------ ** - */ - { - if( RootPtr ) - { - RootPtr->root = NULL; - RootPtr->count = 0L; - RootPtr->cmp = CompFunc; - RootPtr->flags = (Flags & ubi_trDUPKEY) ? ubi_trDUPKEY : Flags; - } /* There are only two supported flags, and they are - * mutually exclusive. ubi_trDUPKEY takes precedence - * over ubi_trOVERWRITE. - */ - return( RootPtr ); - } /* ubi_btInitTree */ - -ubi_trBool ubi_btInsert( ubi_btRootPtr RootPtr, - ubi_btNodePtr NewNode, - ubi_btItemPtr ItemPtr, - ubi_btNodePtr *OldNode ) - /* ------------------------------------------------------------------------ ** - * This function uses a non-recursive algorithm to add a new element to the - * tree. - * - * Input: RootPtr - a pointer to the ubi_btRoot structure that indicates - * the root of the tree to which NewNode is to be added. - * NewNode - a pointer to an ubi_btNode structure that is NOT - * part of any tree. - * ItemPtr - A pointer to the sort key that is stored within - * *NewNode. ItemPtr MUST point to information stored - * in *NewNode or an EXACT DUPLICATE. The key data - * indicated by ItemPtr is used to place the new node - * into the tree. - * OldNode - a pointer to an ubi_btNodePtr. When searching - * the tree, a duplicate node may be found. If - * duplicates are allowed, then the new node will - * be simply placed into the tree. If duplicates - * are not allowed, however, then one of two things - * may happen. - * 1) if overwritting *is not* allowed, this - * function will return FALSE (indicating that - * the new node could not be inserted), and - * *OldNode will point to the duplicate that is - * still in the tree. - * 2) if overwritting *is* allowed, then this - * function will swap **OldNode for *NewNode. - * In this case, *OldNode will point to the node - * that was removed (thus allowing you to free - * the node). - * ** If you are using overwrite mode, ALWAYS ** - * ** check the return value of this parameter! ** - * Note: You may pass NULL in this parameter, the - * function knows how to cope. If you do this, - * however, there will be no way to return a - * pointer to an old (ie. replaced) node (which is - * a problem if you are using overwrite mode). - * - * Output: a boolean value indicating success or failure. The function - * will return FALSE if the node could not be added to the tree. - * Such failure will only occur if duplicates are not allowed, - * nodes cannot be overwritten, AND a duplicate key was found - * within the tree. - * ------------------------------------------------------------------------ ** - */ - { - ubi_btNodePtr OtherP, - parent = NULL; - char tmp; - - if( NULL == OldNode ) /* If they didn't give us a pointer, supply our own. */ - OldNode = &OtherP; - - (void)ubi_btInitNode( NewNode ); /* Init the new node's BinTree fields. */ - - /* Find a place for the new node. */ - *OldNode = TreeFind(ItemPtr, (RootPtr->root), &parent, &tmp, (RootPtr->cmp)); - - /* Now add the node to the tree... */ - if( NULL == (*OldNode) ) /* The easy one: we have a space for a new node! */ - { - if( NULL == parent ) - RootPtr->root = NewNode; - else - { - parent->Link[(int)tmp] = NewNode; - NewNode->Link[ubi_trPARENT] = parent; - NewNode->gender = tmp; - } - (RootPtr->count)++; - return( ubi_trTRUE ); - } - - /* If we reach this point, we know that a duplicate node exists. This - * section adds the node to the tree if duplicate keys are allowed. - */ - if( ubi_trDups_OK(RootPtr) ) /* Key exists, add duplicate */ - { - ubi_btNodePtr q; - - tmp = ubi_trRIGHT; - q = (*OldNode); - *OldNode = NULL; - while( NULL != q ) - { - parent = q; - if( tmp == ubi_trEQUAL ) - tmp = ubi_trRIGHT; - q = q->Link[(int)tmp]; - if ( q ) - tmp = ubi_trAbNormal( (*(RootPtr->cmp))(ItemPtr, q) ); - } - parent->Link[(int)tmp] = NewNode; - NewNode->Link[ubi_trPARENT] = parent; - NewNode->gender = tmp; - (RootPtr->count)++; - return( ubi_trTRUE ); - } - - /* If we get to *this* point, we know that we are not allowed to have - * duplicate nodes, but our node keys match, so... may we replace the - * old one? - */ - if( ubi_trOvwt_OK(RootPtr) ) /* Key exists, we replace */ - { - if( NULL == parent ) - ReplaceNode( &(RootPtr->root), *OldNode, NewNode ); - else - ReplaceNode( &(parent->Link[(int)((*OldNode)->gender)]), - *OldNode, NewNode ); - return( ubi_trTRUE ); - } - - return( ubi_trFALSE ); /* Failure: could not replace an existing node. */ - } /* ubi_btInsert */ - -ubi_btNodePtr ubi_btRemove( ubi_btRootPtr RootPtr, - ubi_btNodePtr DeadNode ) - /* ------------------------------------------------------------------------ ** - * This function removes the indicated node from the tree. - * - * Input: RootPtr - A pointer to the header of the tree that contains - * the node to be removed. - * DeadNode - A pointer to the node that will be removed. - * - * Output: This function returns a pointer to the node that was removed - * from the tree (ie. the same as DeadNode). - * - * Note: The node MUST be in the tree indicated by RootPtr. If not, - * strange and evil things will happen to your trees. - * ------------------------------------------------------------------------ ** - */ - { - ubi_btNodePtr p, - *parentp; - int tmp; - - /* if the node has both left and right subtrees, then we have to swap - * it with another node. The other node we choose will be the Prev()ious - * node, which is garunteed to have no RIGHT child. - */ - if( (NULL != DeadNode->Link[ubi_trLEFT]) - && (NULL != DeadNode->Link[ubi_trRIGHT]) ) - SwapNodes( RootPtr, DeadNode, ubi_btPrev( DeadNode ) ); - - /* The parent of the node to be deleted may be another node, or it may be - * the root of the tree. Since we're not sure, it's best just to have - * a pointer to the parent pointer, whatever it is. - */ - if( NULL == DeadNode->Link[ubi_trPARENT] ) - parentp = &( RootPtr->root ); - else - parentp = &((DeadNode->Link[ubi_trPARENT])->Link[(int)(DeadNode->gender)]); - - /* Now link the parent to the only grand-child and patch up the gender. */ - tmp = ((DeadNode->Link[ubi_trLEFT])?ubi_trLEFT:ubi_trRIGHT); - - p = (DeadNode->Link[tmp]); - if( NULL != p ) - { - p->Link[ubi_trPARENT] = DeadNode->Link[ubi_trPARENT]; - p->gender = DeadNode->gender; - } - (*parentp) = p; - - /* Finished, reduce the node count and return. */ - (RootPtr->count)--; - return( DeadNode ); - } /* ubi_btRemove */ - -ubi_btNodePtr ubi_btLocate( ubi_btRootPtr RootPtr, - ubi_btItemPtr FindMe, - ubi_trCompOps CompOp ) - /* ------------------------------------------------------------------------ ** - * The purpose of ubi_btLocate() is to find a node or set of nodes given - * a target value and a "comparison operator". The Locate() function is - * more flexible and (in the case of trees that may contain dupicate keys) - * more precise than the ubi_btFind() function. The latter is faster, - * but it only searches for exact matches and, if the tree contains - * duplicates, Find() may return a pointer to any one of the duplicate- - * keyed records. - * - * Input: - * RootPtr - A pointer to the header of the tree to be searched. - * FindMe - An ubi_btItemPtr that indicates the key for which to - * search. - * CompOp - One of the following: - * CompOp Return a pointer to the node with - * ------ --------------------------------- - * ubi_trLT - the last key value that is less - * than FindMe. - * ubi_trLE - the first key matching FindMe, or - * the last key that is less than - * FindMe. - * ubi_trEQ - the first key matching FindMe. - * ubi_trGE - the first key matching FindMe, or the - * first key greater than FindMe. - * ubi_trGT - the first key greater than FindMe. - * Output: - * A pointer to the node matching the criteria listed above under - * CompOp, or NULL if no node matched the criteria. - * - * Notes: - * In the case of trees with duplicate keys, Locate() will behave as - * follows: - * - * Find: 3 Find: 3 - * Keys: 1 2 2 2 3 3 3 3 3 4 4 Keys: 1 1 2 2 2 4 4 5 5 5 6 - * ^ ^ ^ ^ ^ - * LT EQ GT LE GE - * - * That is, when returning a pointer to a node with a key that is LESS - * THAN the target key (FindMe), Locate() will return a pointer to the - * LAST matching node. - * When returning a pointer to a node with a key that is GREATER - * THAN the target key (FindMe), Locate() will return a pointer to the - * FIRST matching node. - * - * See Also: ubi_btFind(), ubi_btFirstOf(), ubi_btLastOf(). - * ------------------------------------------------------------------------ ** - */ - { - register ubi_btNodePtr p; - ubi_btNodePtr parent; - char whichkid; - - /* Start by searching for a matching node. */ - p = TreeFind( FindMe, - RootPtr->root, - &parent, - &whichkid, - RootPtr->cmp ); - - if( NULL != p ) /* If we have found a match, we can resolve as follows: */ - { - switch( CompOp ) - { - case ubi_trLT: /* It's just a jump to the left... */ - p = Border( RootPtr, FindMe, p, ubi_trLEFT ); - return( Neighbor( p, ubi_trLEFT ) ); - case ubi_trGT: /* ...and then a jump to the right. */ - p = Border( RootPtr, FindMe, p, ubi_trRIGHT ); - return( Neighbor( p, ubi_trRIGHT ) ); - default: - p = Border( RootPtr, FindMe, p, ubi_trLEFT ); - return( p ); - } - } - - /* Else, no match. */ - if( ubi_trEQ == CompOp ) /* If we were looking for an exact match... */ - return( NULL ); /* ...forget it. */ - - /* We can still return a valid result for GT, GE, LE, and LT. - * <parent> points to a node with a value that is either just before or - * just after the target value. - * Remaining possibilities are LT and GT (including LE & GE). - */ - if( (ubi_trLT == CompOp) || (ubi_trLE == CompOp) ) - return( (ubi_trLEFT == whichkid) ? Neighbor( parent, whichkid ) : parent ); - else - return( (ubi_trRIGHT == whichkid) ? Neighbor( parent, whichkid ) : parent ); - } /* ubi_btLocate */ - -ubi_btNodePtr ubi_btFind( ubi_btRootPtr RootPtr, - ubi_btItemPtr FindMe ) - /* ------------------------------------------------------------------------ ** - * This function performs a non-recursive search of a tree for any node - * matching a specific key. - * - * Input: - * RootPtr - a pointer to the header of the tree to be searched. - * FindMe - a pointer to the key value for which to search. - * - * Output: - * A pointer to a node with a key that matches the key indicated by - * FindMe, or NULL if no such node was found. - * - * Note: In a tree that allows duplicates, the pointer returned *might - * not* point to the (sequentially) first occurance of the - * desired key. In such a tree, it may be more useful to use - * ubi_btLocate(). - * ------------------------------------------------------------------------ ** - */ - { - return( qFind( RootPtr->cmp, FindMe, RootPtr->root ) ); - } /* ubi_btFind */ - -ubi_btNodePtr ubi_btNext( ubi_btNodePtr P ) - /* ------------------------------------------------------------------------ ** - * Given the node indicated by P, find the (sorted order) Next node in the - * tree. - * Input: P - a pointer to a node that exists in a binary tree. - * Output: A pointer to the "next" node in the tree, or NULL if P pointed - * to the "last" node in the tree or was NULL. - * ------------------------------------------------------------------------ ** - */ - { - return( Neighbor( P, ubi_trRIGHT ) ); - } /* ubi_btNext */ - -ubi_btNodePtr ubi_btPrev( ubi_btNodePtr P ) - /* ------------------------------------------------------------------------ ** - * Given the node indicated by P, find the (sorted order) Previous node in - * the tree. - * Input: P - a pointer to a node that exists in a binary tree. - * Output: A pointer to the "previous" node in the tree, or NULL if P - * pointed to the "first" node in the tree or was NULL. - * ------------------------------------------------------------------------ ** - */ - { - return( Neighbor( P, ubi_trLEFT ) ); - } /* ubi_btPrev */ - -ubi_btNodePtr ubi_btFirst( ubi_btNodePtr P ) - /* ------------------------------------------------------------------------ ** - * Given the node indicated by P, find the (sorted order) First node in the - * subtree of which *P is the root. - * Input: P - a pointer to a node that exists in a binary tree. - * Output: A pointer to the "first" node in a subtree that has *P as its - * root. This function will return NULL only if P is NULL. - * Note: In general, you will be passing in the value of the root field - * of an ubi_btRoot structure. - * ------------------------------------------------------------------------ ** - */ - { - return( SubSlide( P, ubi_trLEFT ) ); - } /* ubi_btFirst */ - -ubi_btNodePtr ubi_btLast( ubi_btNodePtr P ) - /* ------------------------------------------------------------------------ ** - * Given the node indicated by P, find the (sorted order) Last node in the - * subtree of which *P is the root. - * Input: P - a pointer to a node that exists in a binary tree. - * Output: A pointer to the "last" node in a subtree that has *P as its - * root. This function will return NULL only if P is NULL. - * Note: In general, you will be passing in the value of the root field - * of an ubi_btRoot structure. - * ------------------------------------------------------------------------ ** - */ - { - return( SubSlide( P, ubi_trRIGHT ) ); - } /* ubi_btLast */ - -ubi_btNodePtr ubi_btFirstOf( ubi_btRootPtr RootPtr, - ubi_btItemPtr MatchMe, - ubi_btNodePtr p ) - /* ------------------------------------------------------------------------ ** - * Given a tree that a allows duplicate keys, and a pointer to a node in - * the tree, this function will return a pointer to the first (traversal - * order) node with the same key value. - * - * Input: RootPtr - A pointer to the root of the tree. - * MatchMe - A pointer to the key value. This should probably - * point to the key within node *p. - * p - A pointer to a node in the tree. - * Output: A pointer to the first node in the set of nodes with keys - * matching <FindMe>. - * Notes: Node *p MUST be in the set of nodes with keys matching - * <FindMe>. If not, this function will return NULL. - * - * 4.7: Bug found & fixed by Massimo Campostrini, - * Istituto Nazionale di Fisica Nucleare, Sezione di Pisa. - * - * ------------------------------------------------------------------------ ** - */ - { - /* If our starting point is invalid, return NULL. */ - if( (NULL == p) - || (ubi_trEQUAL != ubi_trAbNormal( (*(RootPtr->cmp))( MatchMe, p ) )) ) - return( NULL ); - return( Border( RootPtr, MatchMe, p, ubi_trLEFT ) ); - } /* ubi_btFirstOf */ - -ubi_btNodePtr ubi_btLastOf( ubi_btRootPtr RootPtr, - ubi_btItemPtr MatchMe, - ubi_btNodePtr p ) - /* ------------------------------------------------------------------------ ** - * Given a tree that a allows duplicate keys, and a pointer to a node in - * the tree, this function will return a pointer to the last (traversal - * order) node with the same key value. - * - * Input: RootPtr - A pointer to the root of the tree. - * MatchMe - A pointer to the key value. This should probably - * point to the key within node *p. - * p - A pointer to a node in the tree. - * Output: A pointer to the last node in the set of nodes with keys - * matching <FindMe>. - * Notes: Node *p MUST be in the set of nodes with keys matching - * <FindMe>. If not, this function will return NULL. - * - * 4.7: Bug found & fixed by Massimo Campostrini, - * Istituto Nazionale di Fisica Nucleare, Sezione di Pisa. - * - * ------------------------------------------------------------------------ ** - */ - { - /* If our starting point is invalid, return NULL. */ - if( (NULL != p) - || (ubi_trEQUAL != ubi_trAbNormal( (*(RootPtr->cmp))( MatchMe, p ) )) ) - return( NULL ); - return( Border( RootPtr, MatchMe, p, ubi_trRIGHT ) ); - } /* ubi_btLastOf */ - -unsigned long ubi_btTraverse( ubi_btRootPtr RootPtr, - ubi_btActionRtn EachNode, - void *UserData ) - /* ------------------------------------------------------------------------ ** - * Traverse a tree in sorted order (non-recursively). At each node, call - * (*EachNode)(), passing a pointer to the current node, and UserData as the - * second parameter. - * - * Input: RootPtr - a pointer to an ubi_btRoot structure that indicates - * the tree to be traversed. - * EachNode - a pointer to a function to be called at each node - * as the node is visited. - * UserData - a generic pointer that may point to anything that - * you choose. - * - * Output: A count of the number of nodes visited. This will be zero - * if the tree is empty. - * - * ------------------------------------------------------------------------ ** - */ - { - ubi_btNodePtr p = ubi_btFirst( RootPtr->root ); - unsigned long count = 0; - - while( NULL != p ) - { - (*EachNode)( p, UserData ); - count++; - p = ubi_btNext( p ); - } - return( count ); - } /* ubi_btTraverse */ - -unsigned long ubi_btKillTree( ubi_btRootPtr RootPtr, - ubi_btKillNodeRtn FreeNode ) - /* ------------------------------------------------------------------------ ** - * Delete an entire tree (non-recursively) and reinitialize the ubi_btRoot - * structure. Return a count of the number of nodes deleted. - * - * Input: RootPtr - a pointer to an ubi_btRoot structure that indicates - * the root of the tree to delete. - * FreeNode - a function that will be called for each node in the - * tree to deallocate the memory used by the node. - * - * Output: The number of nodes removed from the tree. - * A value of 0 will be returned if: - * - The tree actually contains 0 entries. - * - the value of <RootPtr> is NULL, in which case the tree is - * assumed to be empty - * - the value of <FreeNode> is NULL, in which case entries - * cannot be removed, so 0 is returned. *Make sure that you - * provide a valid value for <FreeNode>*. - * In all other cases, you should get a positive value equal to - * the value of RootPtr->count upon entry. - * - * ------------------------------------------------------------------------ ** - */ - { - ubi_btNodePtr p, q; - unsigned long count = 0; - - if( (NULL == RootPtr) || (NULL == FreeNode) ) - return( 0 ); - - p = ubi_btFirst( RootPtr->root ); - while( NULL != p ) - { - q = p; - while( q->Link[ubi_trRIGHT] ) - q = SubSlide( q->Link[ubi_trRIGHT], ubi_trLEFT ); - p = q->Link[ubi_trPARENT]; - if( NULL != p ) - p->Link[ ((p->Link[ubi_trLEFT] == q)?ubi_trLEFT:ubi_trRIGHT) ] = NULL; - (*FreeNode)((void *)q); - count++; - } - - /* overkill... */ - (void)ubi_btInitTree( RootPtr, - RootPtr->cmp, - RootPtr->flags ); - return( count ); - } /* ubi_btKillTree */ - -ubi_btNodePtr ubi_btLeafNode( ubi_btNodePtr leader ) - /* ------------------------------------------------------------------------ ** - * Returns a pointer to a leaf node. - * - * Input: leader - Pointer to a node at which to start the descent. - * - * Output: A pointer to a leaf node, selected in a somewhat arbitrary - * manner but with an effort to dig deep. - * - * Notes: I wrote this function because I was using splay trees as a - * database cache. The cache had a maximum size on it, and I - * needed a way of choosing a node to sacrifice if the cache - * became full. In a splay tree, less recently accessed nodes - * tend toward the bottom of the tree, meaning that leaf nodes - * are good candidates for removal. (I really can't think of - * any other reason to use this function.) - * + In a simple binary tree, or in an AVL tree, the most recently - * added nodes tend to be nearer the bottom, making this a *bad* - * way to choose which node to remove from the cache. - * + Randomizing the traversal order is probably a good idea. You - * can improve the randomization of leaf node selection by passing - * in pointers to nodes other than the root node each time. A - * pointer to any node in the tree will do. Of course, if you - * pass a pointer to a leaf node you'll get the same thing back. - * + In an unbalanced splay tree, if you simply traverse downward - * until you hit a leaf node it is possible to accidentally - * stumble onto a short path. The result will be a leaf node - * that is actually very high in the tree--possibly a very - * recently accessed node. Not good. This function can follow - * multiple paths in an effort to find a leaf node deeper - * in the tree. Following a single path, of course, is the - * fastest way to find a leaf node. A complete traversal would - * be sure to find the deepest leaf but would be very costly in - * terms of time. This function uses a compromise that has - * worked well in testing. - * - * ------------------------------------------------------------------------ ** - */ - { - #define MAXPATHS 4 /* Set higher for more maximum paths, lower for fewer. */ - ubi_trNodePtr p[MAXPATHS]; - ubi_trNodePtr q[MAXPATHS]; - int whichway = ubi_trLEFT; - int paths; - int i, j; - - /* If the subtree is empty, return NULL. - */ - if( NULL == leader ) - return( NULL ); - - /* Initialize the p[] array with a pointer to the single node we've been - * given as a starting point. - */ - p[0] = leader; - paths = 1; - while( paths > 0 ) - { - for( i = 0; i < paths; i++ ) - q[i] = p[i]; - - for( i = j = 0; (i < paths) && (j < MAXPATHS); i++ ) - { - if( NULL != q[i]->Link[whichway] ) - p[j++] = q[i]->Link[whichway]; - whichway = ubi_trRevWay( whichway ); - if( (j < MAXPATHS) && (NULL != q[i]->Link[whichway]) ) - p[j++] = q[i]->Link[whichway]; - } - paths = j; - } - - return( q[0] ); - } /* ubi_btLeafNode */ - -int ubi_btModuleID( int size, char *list[] ) - /* ------------------------------------------------------------------------ ** - * Returns a set of strings that identify the module. - * - * Input: size - The number of elements in the array <list>. - * list - An array of pointers of type (char *). This array - * should, initially, be empty. This function will fill - * in the array with pointers to strings. - * Output: The number of elements of <list> that were used. If this value - * is less than <size>, the values of the remaining elements are - * not guaranteed. - * - * Notes: Please keep in mind that the pointers returned indicate strings - * stored in static memory. Don't free() them, don't write over - * them, etc. Just read them. - * ------------------------------------------------------------------------ ** - */ - { - if( size > 0 ) - { - list[0] = ModuleID; - if( size > 1 ) - list[1] = NULL; - return( 1 ); - } - return( 0 ); - } /* ubi_btModuleID */ - - -/* ========================================================================== */ diff --git a/source3/ubiqx/ubi_BinTree.h b/source3/ubiqx/ubi_BinTree.h deleted file mode 100644 index 43ca1a9871..0000000000 --- a/source3/ubiqx/ubi_BinTree.h +++ /dev/null @@ -1,887 +0,0 @@ -#ifndef UBI_BINTREE_H -#define UBI_BINTREE_H -/* ========================================================================== ** - * ubi_BinTree.h - * - * Copyright (C) 1991-1998 by Christopher R. Hertel - * - * Email: crh@ubiqx.mn.org - * -------------------------------------------------------------------------- ** - * - * This module implements a simple binary tree. - * - * -------------------------------------------------------------------------- ** - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Library General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Library General Public License for more details. - * - * You should have received a copy of the GNU Library General Public - * License along with this library; if not, write to the Free - * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - * - * -------------------------------------------------------------------------- ** - * - * Log: ubi_BinTree.h,v - * Revision 4.12 2004/06/06 04:51:56 crh - * Fixed a small typo in ubi_BinTree.c (leftover testing cruft). - * Did a small amount of formatting touchup to ubi_BinTree.h. - * - * Revision 4.11 2004/06/06 03:14:09 crh - * Rewrote the ubi_btLeafNode() function. It now takes several paths in an - * effort to find a deeper leaf node. There is a small amount of extra - * overhead, but it is limited. - * - * Revision 4.10 2000/06/06 20:38:40 crh - * In the ReplaceNode() function, the old node header was being copied - * to the new node header using a byte-by-byte copy. This was causing - * the 'insure' software testing program to report a memory leak. The - * fix was to do a simple assignement: *newnode = *oldnode; - * This quieted the (errant) memory leak reports and is probably a bit - * faster than the bytewise copy. - * - * Revision 4.9 2000/01/08 23:24:30 crh - * Clarified a variety of if( pointer ) lines, replacing them with - * if( NULL != pointer ). This is more correct, and I have heard - * of at least one (obscure?) system out there that uses a non-zero - * value for NULL. - * Also, speed improvement in Neighbor(). It was comparing pointers - * when it could have compared two gender values. The pointer - * comparison was somewhat indirect (does pointer equal the pointer - * of the parent of the node pointed to by pointer). Urq. - * - * Revision 4.8 1999/09/22 03:40:30 crh - * Modified ubi_btTraverse() and ubi_btKillTree(). They now return an - * unsigned long indicating the number of nodes processed. The change - * is subtle. An empty tree formerly returned False, and now returns - * zero. - * - * Revision 4.7 1998/10/21 06:15:07 crh - * Fixed bugs in FirstOf() and LastOf() reported by Massimo Campostrini. - * See function comments. - * - * Revision 4.6 1998/07/25 17:02:10 crh - * Added the ubi_trNewTree() macro. - * - * Revision 4.5 1998/06/04 21:29:27 crh - * Upper-cased defined constants (eg UBI_BINTREE_H) in some header files. - * This is more "standard", and is what people expect. Weird, eh? - * - * Revision 4.4 1998/06/03 17:42:46 crh - * Further fiddling with sys_include.h. It's now in ubi_BinTree.h which is - * included by all of the binary tree files. - * - * Reminder: Some of the ubi_tr* macros in ubi_BinTree.h are redefined in - * ubi_AVLtree.h and ubi_SplayTree.h. This allows easy swapping - * of tree types by simply changing a header. Unfortunately, the - * macro redefinitions in ubi_AVLtree.h and ubi_SplayTree.h will - * conflict if used together. You must either choose a single tree - * type, or use the underlying function calls directly. Compare - * the two header files for more information. - * - * Revision 4.3 1998/06/02 01:28:43 crh - * Changed ubi_null.h to sys_include.h to make it more generic. - * - * Revision 4.2 1998/05/20 04:32:36 crh - * The C file now includes ubi_null.h. See ubi_null.h for more info. - * Also, the balance and gender fields of the node were declared as - * signed char. As I understand it, at least one SunOS or Solaris - * compiler doesn't like "signed char". The declarations were - * wrong anyway, so I changed them to simple "char". - * - * Revision 4.1 1998/03/31 06:13:47 crh - * Thomas Aglassinger sent E'mail pointing out errors in the - * dereferencing of function pointers, and a missing typecast. - * Thanks, Thomas! - * - * Revision 4.0 1998/03/10 03:16:04 crh - * Added the AVL field 'balance' to the ubi_btNode structure. This means - * that all BinTree modules now use the same basic node structure, which - * greatly simplifies the AVL module. - * Decided that this was a big enough change to justify a new major revision - * number. 3.0 was an error, so we're at 4.0. - * - * Revision 2.6 1998/01/24 06:27:30 crh - * Added ubi_trCount() macro. - * - * Revision 2.5 1997/12/23 03:59:21 crh - * In this version, all constants & macros defined in the header file have - * the ubi_tr prefix. Also cleaned up anything that gcc complained about - * when run with '-pedantic -fsyntax-only -Wall'. - * - * Revision 2.4 1997/07/26 04:11:14 crh - * + Just to be annoying I changed ubi_TRUE and ubi_FALSE to ubi_trTRUE - * and ubi_trFALSE. - * + There is now a type ubi_trBool to go with ubi_trTRUE and ubi_trFALSE. - * + There used to be something called "ubi_TypeDefs.h". I got rid of it. - * + Added function ubi_btLeafNode(). - * - * Revision 2.3 1997/06/03 05:15:27 crh - * Changed TRUE and FALSE to ubi_TRUE and ubi_FALSE to avoid conflicts. - * Also changed the interface to function InitTree(). See the comments - * for this function for more information. - * - * Revision 2.2 1995/10/03 22:00:40 CRH - * Ubisized! - * - * Revision 2.1 95/03/09 23:43:46 CRH - * Added the ModuleID static string and function. These modules are now - * self-identifying. - * - * Revision 2.0 95/02/27 22:00:33 CRH - * Revision 2.0 of this program includes the following changes: - * - * 1) A fix to a major typo in the RepaceNode() function. - * 2) The addition of the static function Border(). - * 3) The addition of the public functions FirstOf() and LastOf(), which - * use Border(). These functions are used with trees that allow - * duplicate keys. - * 4) A complete rewrite of the Locate() function. Locate() now accepts - * a "comparison" operator. - * 5) Overall enhancements to both code and comments. - * - * I decided to give this a new major rev number because the interface has - * changed. In particular, there are two new functions, and changes to the - * Locate() function. - * - * Revision 1.0 93/10/15 22:55:04 CRH - * With this revision, I have added a set of #define's that provide a single, - * standard API to all existing tree modules. Until now, each of the three - * existing modules had a different function and typedef prefix, as follows: - * - * Module Prefix - * ubi_BinTree ubi_bt - * ubi_AVLtree ubi_avl - * ubi_SplayTree ubi_spt - * - * To further complicate matters, only those portions of the base module - * (ubi_BinTree) that were superceeded in the new module had the new names. - * For example, if you were using ubi_SplayTree, the locate function was - * called "ubi_sptLocate", but the next and previous functions remained - * "ubi_btNext" and "ubi_btPrev". - * - * This was not too terrible if you were familiar with the modules and knew - * exactly which tree model you wanted to use. If you wanted to be able to - * change modules (for speed comparisons, etc), things could get messy very - * quickly. - * - * So, I have added a set of defined names that get redefined in any of the - * descendant modules. To use this standardized interface in your code, - * simply replace all occurances of "ubi_bt", "ubi_avl", and "ubi_spt" with - * "ubi_tr". The "ubi_tr" names will resolve to the correct function or - * datatype names for the module that you are using. Just remember to - * include the header for that module in your program file. Because these - * names are handled by the preprocessor, there is no added run-time - * overhead. - * - * Note that the original names do still exist, and can be used if you wish - * to write code directly to a specific module. This should probably only be - * done if you are planning to implement a new descendant type, such as - * red/black trees. CRH - * - * V0.0 - June, 1991 - Written by Christopher R. Hertel (CRH). - * - * ========================================================================== ** - */ - -#include "sys_include.h" /* Global include file, used to adapt the ubiqx - * modules to the host environment and the project - * with which the modules will be used. See - * sys_include.h for more info. - */ - -/* -------------------------------------------------------------------------- ** - * Macros and constants. - * - * General purpose: - * ubi_trTRUE - Boolean TRUE. - * ubi_trFALSE - Boolean FALSE. - * - * Flags used in the tree header: - * ubi_trOVERWRITE - This flag indicates that an existing node may be - * overwritten by a new node with a matching key. - * ubi_trDUPKEY - This flag indicates that the tree allows duplicate - * keys. If the tree does allow duplicates, the - * overwrite flag is ignored. - * - * Node link array index constants: (Each node has an array of three - * pointers. One to the left, one to the right, and one back to the - * parent.) - * ubi_trLEFT - Left child pointer. - * ubi_trPARENT - Parent pointer. - * ubi_trRIGHT - Right child pointer. - * ubi_trEQUAL - Synonym for PARENT. - * - * ubi_trCompOps: These values are used in the ubi_trLocate() function. - * ubi_trLT - request the first instance of the greatest key less than - * the search key. - * ubi_trLE - request the first instance of the greatest key that is less - * than or equal to the search key. - * ubi_trEQ - request the first instance of key that is equal to the - * search key. - * ubi_trGE - request the first instance of a key that is greater than - * or equal to the search key. - * ubi_trGT - request the first instance of the first key that is greater - * than the search key. - * -------------------------------------------------------------------------- ** - */ - -#define ubi_trTRUE 0xFF -#define ubi_trFALSE 0x00 - -#define ubi_trOVERWRITE 0x01 /* Turn on allow overwrite */ -#define ubi_trDUPKEY 0x02 /* Turn on allow duplicate keys */ - -/* Pointer array index constants... */ -#define ubi_trLEFT 0x00 -#define ubi_trPARENT 0x01 -#define ubi_trRIGHT 0x02 -#define ubi_trEQUAL ubi_trPARENT - -typedef enum { - ubi_trLT = 1, - ubi_trLE, - ubi_trEQ, - ubi_trGE, - ubi_trGT - } ubi_trCompOps; - -/* -------------------------------------------------------------------------- ** - * These three macros allow simple manipulation of pointer index values (LEFT, - * RIGHT, and PARENT). - * - * Normalize() - converts {LEFT, PARENT, RIGHT} into {-1, 0 ,1}. C - * uses {negative, zero, positive} values to indicate - * {less than, equal to, greater than}. - * AbNormal() - converts {negative, zero, positive} to {LEFT, PARENT, - * RIGHT} (opposite of Normalize()). Note: C comparison - * functions, such as strcmp(), return {negative, zero, - * positive} values, which are not necessarily {-1, 0, - * 1}. This macro uses the the ubi_btSgn() function to - * compensate. - * RevWay() - converts LEFT to RIGHT and RIGHT to LEFT. PARENT (EQUAL) - * is left as is. - * -------------------------------------------------------------------------- ** - */ - -#define ubi_trNormalize(W) ((char)( (W) - ubi_trEQUAL )) -#define ubi_trAbNormal(W) ((char)( ((char)ubi_btSgn( (long)(W) )) \ - + ubi_trEQUAL )) -#define ubi_trRevWay(W) ((char)( ubi_trEQUAL - ((W) - ubi_trEQUAL) )) - -/* -------------------------------------------------------------------------- ** - * These macros allow us to quickly read the values of the OVERWRITE and - * DUPlicate KEY bits of the tree root flags field. - * -------------------------------------------------------------------------- ** - */ - -#define ubi_trDups_OK(A) \ - ((ubi_trDUPKEY & ((A)->flags))?(ubi_trTRUE):(ubi_trFALSE)) -#define ubi_trOvwt_OK(A) \ - ((ubi_trOVERWRITE & ((A)->flags))?(ubi_trTRUE):(ubi_trFALSE)) - -/* -------------------------------------------------------------------------- ** - * Additional Macros... - * - * ubi_trCount() - Given a pointer to a tree root, this macro returns the - * number of nodes currently in the tree. - * - * ubi_trNewTree() - This macro makes it easy to declare and initialize a - * tree header in one step. The line - * - * static ubi_trNewTree( MyTree, cmpfn, ubi_trDUPKEY ); - * - * is equivalent to - * - * static ubi_trRoot MyTree[1] - * = {{ NULL, cmpfn, 0, ubi_trDUPKEY }}; - * - * -------------------------------------------------------------------------- ** - */ - -#define ubi_trCount( R ) (((ubi_trRootPtr)(R))->count) - -#define ubi_trNewTree( N, C, F ) ubi_trRoot (N)[1] = {{ NULL, (C), 0, (F) }} - -/* -------------------------------------------------------------------------- ** - * Typedefs... - * - * ubi_trBool - Your typcial true or false... - * - * Item Pointer: The ubi_btItemPtr is a generic pointer. It is used to - * indicate a key that is being searched for within the tree. - * Searching occurs whenever the ubi_trFind(), ubi_trLocate(), - * or ubi_trInsert() functions are called. - * -------------------------------------------------------------------------- ** - */ - -typedef unsigned char ubi_trBool; - -typedef void *ubi_btItemPtr; /* A pointer to key data within a node. */ - -/* ------------------------------------------------------------------------- ** - * Binary Tree Node Structure: This structure defines the basic elements of - * the tree nodes. In general you *SHOULD NOT PLAY WITH THESE FIELDS*! - * But, of course, I have to put the structure into this header so that - * you can use it as a building block. - * - * The fields are as follows: - * Link - an array of pointers. These pointers are manipulated by - * the BT routines. The pointers indicate the left and right - * child nodes and the parent node. By keeping track of the - * parent pointer, we avoid the need for recursive routines or - * hand-tooled stacks to keep track of our path back to the - * root. The use of these pointers is subject to change without - * notice. - * gender - a one-byte field indicating whether the node is the RIGHT or - * LEFT child of its parent. If the node is the root of the - * tree, gender will be PARENT. - * balance - only used by the AVL tree module. This field indicates - * the height balance at a given node. See ubi_AVLtree for - * details. - * - * ------------------------------------------------------------------------- ** - */ - -typedef struct ubi_btNodeStruct { - struct ubi_btNodeStruct *Link[ 3 ]; - char gender; - char balance; - } ubi_btNode; - -typedef ubi_btNode *ubi_btNodePtr; /* Pointer to an ubi_btNode structure. */ - -/* ------------------------------------------------------------------------- ** - * The next three typedefs define standard function types used by the binary - * tree management routines. In particular: - * - * ubi_btCompFunc is a pointer to a comparison function. Comparison - * functions are passed an ubi_btItemPtr and an - * ubi_btNodePtr. They return a value that is (<0), 0, - * or (>0) to indicate that the Item is (respectively) - * "less than", "equal to", or "greater than" the Item - * contained within the node. (See ubi_btInitTree()). - * ubi_btActionRtn is a pointer to a function that may be called for each - * node visited when performing a tree traversal (see - * ubi_btTraverse()). The function will be passed two - * parameters: the first is a pointer to a node in the - * tree, the second is a generic pointer that may point to - * anything that you like. - * ubi_btKillNodeRtn is a pointer to a function that will deallocate the - * memory used by a node (see ubi_btKillTree()). Since - * memory management is left up to you, deallocation may - * mean anything that you want it to mean. Just remember - * that the tree *will* be destroyed and that none of the - * node pointers will be valid any more. - * ------------------------------------------------------------------------- ** - */ - -typedef int (*ubi_btCompFunc)( ubi_btItemPtr, ubi_btNodePtr ); - -typedef void (*ubi_btActionRtn)( ubi_btNodePtr, void * ); - -typedef void (*ubi_btKillNodeRtn)( ubi_btNodePtr ); - -/* -------------------------------------------------------------------------- ** - * Tree Root Structure: This structure gives us a convenient handle for - * accessing whole binary trees. The fields are: - * root - A pointer to the root node of the tree. - * count - A count of the number of nodes stored in the tree. - * cmp - A pointer to the comparison routine to be used when building or - * searching the tree. - * flags - A set of bit flags. Two flags are currently defined: - * - * ubi_trOVERWRITE - If set, this flag indicates that a new node should - * (bit 0x01) overwrite an old node if the two have identical - * keys (ie., the keys are equal). - * ubi_trDUPKEY - If set, this flag indicates that the tree is - * (bit 0x02) allowed to contain nodes with duplicate keys. - * - * NOTE: ubi_trInsert() tests ubi_trDUPKEY before ubi_trOVERWRITE. - * - * All of these values are set when you initialize the root structure by - * calling ubi_trInitTree(). - * -------------------------------------------------------------------------- ** - */ - -typedef struct { - ubi_btNodePtr root; /* A pointer to the root node of the tree */ - ubi_btCompFunc cmp; /* A pointer to the tree's comparison function */ - unsigned long count; /* A count of the number of nodes in the tree */ - char flags; /* Overwrite Y|N, Duplicate keys Y|N... */ - } ubi_btRoot; - -typedef ubi_btRoot *ubi_btRootPtr; /* Pointer to an ubi_btRoot structure. */ - - -/* -------------------------------------------------------------------------- ** - * Function Prototypes. - */ - -long ubi_btSgn( long x ); - /* ------------------------------------------------------------------------ ** - * Return the sign of x; {negative,zero,positive} ==> {-1, 0, 1}. - * - * Input: x - a signed long integer value. - * - * Output: the "sign" of x, represented as follows: - * -1 == negative - * 0 == zero (no sign) - * 1 == positive - * - * Note: This utility is provided in order to facilitate the conversion - * of C comparison function return values into BinTree direction - * values: {LEFT, PARENT, EQUAL}. It is INCORPORATED into the - * AbNormal() conversion macro! - * - * ------------------------------------------------------------------------ ** - */ - -ubi_btNodePtr ubi_btInitNode( ubi_btNodePtr NodePtr ); - /* ------------------------------------------------------------------------ ** - * Initialize a tree node. - * - * Input: a pointer to a ubi_btNode structure to be initialized. - * Output: a pointer to the initialized ubi_btNode structure (ie. the - * same as the input pointer). - * ------------------------------------------------------------------------ ** - */ - -ubi_btRootPtr ubi_btInitTree( ubi_btRootPtr RootPtr, - ubi_btCompFunc CompFunc, - char Flags ); - /* ------------------------------------------------------------------------ ** - * Initialize the fields of a Tree Root header structure. - * - * Input: RootPtr - a pointer to an ubi_btRoot structure to be - * initialized. - * CompFunc - a pointer to a comparison function that will be used - * whenever nodes in the tree must be compared against - * outside values. - * Flags - One bytes worth of flags. Flags include - * ubi_trOVERWRITE and ubi_trDUPKEY. See the header - * file for more info. - * - * Output: a pointer to the initialized ubi_btRoot structure (ie. the - * same value as RootPtr). - * - * Note: The interface to this function has changed from that of - * previous versions. The <Flags> parameter replaces two - * boolean parameters that had the same basic effect. - * ------------------------------------------------------------------------ ** - */ - -ubi_trBool ubi_btInsert( ubi_btRootPtr RootPtr, - ubi_btNodePtr NewNode, - ubi_btItemPtr ItemPtr, - ubi_btNodePtr *OldNode ); - /* ------------------------------------------------------------------------ ** - * This function uses a non-recursive algorithm to add a new element to the - * tree. - * - * Input: RootPtr - a pointer to the ubi_btRoot structure that indicates - * the root of the tree to which NewNode is to be added. - * NewNode - a pointer to an ubi_btNode structure that is NOT - * part of any tree. - * ItemPtr - A pointer to the sort key that is stored within - * *NewNode. ItemPtr MUST point to information stored - * in *NewNode or an EXACT DUPLICATE. The key data - * indicated by ItemPtr is used to place the new node - * into the tree. - * OldNode - a pointer to an ubi_btNodePtr. When searching - * the tree, a duplicate node may be found. If - * duplicates are allowed, then the new node will - * be simply placed into the tree. If duplicates - * are not allowed, however, then one of two things - * may happen. - * 1) if overwritting *is not* allowed, this - * function will return FALSE (indicating that - * the new node could not be inserted), and - * *OldNode will point to the duplicate that is - * still in the tree. - * 2) if overwritting *is* allowed, then this - * function will swap **OldNode for *NewNode. - * In this case, *OldNode will point to the node - * that was removed (thus allowing you to free - * the node). - * ** If you are using overwrite mode, ALWAYS ** - * ** check the return value of this parameter! ** - * Note: You may pass NULL in this parameter, the - * function knows how to cope. If you do this, - * however, there will be no way to return a - * pointer to an old (ie. replaced) node (which is - * a problem if you are using overwrite mode). - * - * Output: a boolean value indicating success or failure. The function - * will return FALSE if the node could not be added to the tree. - * Such failure will only occur if duplicates are not allowed, - * nodes cannot be overwritten, AND a duplicate key was found - * within the tree. - * ------------------------------------------------------------------------ ** - */ - -ubi_btNodePtr ubi_btRemove( ubi_btRootPtr RootPtr, - ubi_btNodePtr DeadNode ); - /* ------------------------------------------------------------------------ ** - * This function removes the indicated node from the tree. - * - * Input: RootPtr - A pointer to the header of the tree that contains - * the node to be removed. - * DeadNode - A pointer to the node that will be removed. - * - * Output: This function returns a pointer to the node that was removed - * from the tree (ie. the same as DeadNode). - * - * Note: The node MUST be in the tree indicated by RootPtr. If not, - * strange and evil things will happen to your trees. - * ------------------------------------------------------------------------ ** - */ - -ubi_btNodePtr ubi_btLocate( ubi_btRootPtr RootPtr, - ubi_btItemPtr FindMe, - ubi_trCompOps CompOp ); - /* ------------------------------------------------------------------------ ** - * The purpose of ubi_btLocate() is to find a node or set of nodes given - * a target value and a "comparison operator". The Locate() function is - * more flexible and (in the case of trees that may contain dupicate keys) - * more precise than the ubi_btFind() function. The latter is faster, - * but it only searches for exact matches and, if the tree contains - * duplicates, Find() may return a pointer to any one of the duplicate- - * keyed records. - * - * Input: - * RootPtr - A pointer to the header of the tree to be searched. - * FindMe - An ubi_btItemPtr that indicates the key for which to - * search. - * CompOp - One of the following: - * CompOp Return a pointer to the node with - * ------ --------------------------------- - * ubi_trLT - the last key value that is less - * than FindMe. - * ubi_trLE - the first key matching FindMe, or - * the last key that is less than - * FindMe. - * ubi_trEQ - the first key matching FindMe. - * ubi_trGE - the first key matching FindMe, or the - * first key greater than FindMe. - * ubi_trGT - the first key greater than FindMe. - * Output: - * A pointer to the node matching the criteria listed above under - * CompOp, or NULL if no node matched the criteria. - * - * Notes: - * In the case of trees with duplicate keys, Locate() will behave as - * follows: - * - * Find: 3 Find: 3 - * Keys: 1 2 2 2 3 3 3 3 3 4 4 Keys: 1 1 2 2 2 4 4 5 5 5 6 - * ^ ^ ^ ^ ^ - * LT EQ GT LE GE - * - * That is, when returning a pointer to a node with a key that is LESS - * THAN the target key (FindMe), Locate() will return a pointer to the - * LAST matching node. - * When returning a pointer to a node with a key that is GREATER - * THAN the target key (FindMe), Locate() will return a pointer to the - * FIRST matching node. - * - * See Also: ubi_btFind(), ubi_btFirstOf(), ubi_btLastOf(). - * ------------------------------------------------------------------------ ** - */ - -ubi_btNodePtr ubi_btFind( ubi_btRootPtr RootPtr, - ubi_btItemPtr FindMe ); - /* ------------------------------------------------------------------------ ** - * This function performs a non-recursive search of a tree for any node - * matching a specific key. - * - * Input: - * RootPtr - a pointer to the header of the tree to be searched. - * FindMe - a pointer to the key value for which to search. - * - * Output: - * A pointer to a node with a key that matches the key indicated by - * FindMe, or NULL if no such node was found. - * - * Note: In a tree that allows duplicates, the pointer returned *might - * not* point to the (sequentially) first occurance of the - * desired key. In such a tree, it may be more useful to use - * ubi_btLocate(). - * ------------------------------------------------------------------------ ** - */ - -ubi_btNodePtr ubi_btNext( ubi_btNodePtr P ); - /* ------------------------------------------------------------------------ ** - * Given the node indicated by P, find the (sorted order) Next node in the - * tree. - * Input: P - a pointer to a node that exists in a binary tree. - * Output: A pointer to the "next" node in the tree, or NULL if P pointed - * to the "last" node in the tree or was NULL. - * ------------------------------------------------------------------------ ** - */ - -ubi_btNodePtr ubi_btPrev( ubi_btNodePtr P ); - /* ------------------------------------------------------------------------ ** - * Given the node indicated by P, find the (sorted order) Previous node in - * the tree. - * Input: P - a pointer to a node that exists in a binary tree. - * Output: A pointer to the "previous" node in the tree, or NULL if P - * pointed to the "first" node in the tree or was NULL. - * ------------------------------------------------------------------------ ** - */ - -ubi_btNodePtr ubi_btFirst( ubi_btNodePtr P ); - /* ------------------------------------------------------------------------ ** - * Given the node indicated by P, find the (sorted order) First node in the - * subtree of which *P is the root. - * Input: P - a pointer to a node that exists in a binary tree. - * Output: A pointer to the "first" node in a subtree that has *P as its - * root. This function will return NULL only if P is NULL. - * Note: In general, you will be passing in the value of the root field - * of an ubi_btRoot structure. - * ------------------------------------------------------------------------ ** - */ - -ubi_btNodePtr ubi_btLast( ubi_btNodePtr P ); - /* ------------------------------------------------------------------------ ** - * Given the node indicated by P, find the (sorted order) Last node in the - * subtree of which *P is the root. - * Input: P - a pointer to a node that exists in a binary tree. - * Output: A pointer to the "last" node in a subtree that has *P as its - * root. This function will return NULL only if P is NULL. - * Note: In general, you will be passing in the value of the root field - * of an ubi_btRoot structure. - * ------------------------------------------------------------------------ ** - */ - -ubi_btNodePtr ubi_btFirstOf( ubi_btRootPtr RootPtr, - ubi_btItemPtr MatchMe, - ubi_btNodePtr p ); - /* ------------------------------------------------------------------------ ** - * Given a tree that a allows duplicate keys, and a pointer to a node in - * the tree, this function will return a pointer to the first (traversal - * order) node with the same key value. - * - * Input: RootPtr - A pointer to the root of the tree. - * MatchMe - A pointer to the key value. This should probably - * point to the key within node *p. - * p - A pointer to a node in the tree. - * Output: A pointer to the first node in the set of nodes with keys - * matching <FindMe>. - * Notes: Node *p MUST be in the set of nodes with keys matching - * <FindMe>. If not, this function will return NULL. - * - * 4.7: Bug found & fixed by Massimo Campostrini, - * Istituto Nazionale di Fisica Nucleare, Sezione di Pisa. - * - * ------------------------------------------------------------------------ ** - */ - -ubi_btNodePtr ubi_btLastOf( ubi_btRootPtr RootPtr, - ubi_btItemPtr MatchMe, - ubi_btNodePtr p ); - /* ------------------------------------------------------------------------ ** - * Given a tree that a allows duplicate keys, and a pointer to a node in - * the tree, this function will return a pointer to the last (traversal - * order) node with the same key value. - * - * Input: RootPtr - A pointer to the root of the tree. - * MatchMe - A pointer to the key value. This should probably - * point to the key within node *p. - * p - A pointer to a node in the tree. - * Output: A pointer to the last node in the set of nodes with keys - * matching <FindMe>. - * Notes: Node *p MUST be in the set of nodes with keys matching - * <FindMe>. If not, this function will return NULL. - * - * 4.7: Bug found & fixed by Massimo Campostrini, - * Istituto Nazionale di Fisica Nucleare, Sezione di Pisa. - * - * ------------------------------------------------------------------------ ** - */ - -unsigned long ubi_btTraverse( ubi_btRootPtr RootPtr, - ubi_btActionRtn EachNode, - void *UserData ); - /* ------------------------------------------------------------------------ ** - * Traverse a tree in sorted order (non-recursively). At each node, call - * (*EachNode)(), passing a pointer to the current node, and UserData as the - * second parameter. - * - * Input: RootPtr - a pointer to an ubi_btRoot structure that indicates - * the tree to be traversed. - * EachNode - a pointer to a function to be called at each node - * as the node is visited. - * UserData - a generic pointer that may point to anything that - * you choose. - * - * Output: A count of the number of nodes visited. This will be zero - * if the tree is empty. - * - * ------------------------------------------------------------------------ ** - */ - - -unsigned long ubi_btKillTree( ubi_btRootPtr RootPtr, - ubi_btKillNodeRtn FreeNode ); - /* ------------------------------------------------------------------------ ** - * Delete an entire tree (non-recursively) and reinitialize the ubi_btRoot - * structure. Return a count of the number of nodes deleted. - * - * Input: RootPtr - a pointer to an ubi_btRoot structure that indicates - * the root of the tree to delete. - * FreeNode - a function that will be called for each node in the - * tree to deallocate the memory used by the node. - * - * Output: The number of nodes removed from the tree. - * A value of 0 will be returned if: - * - The tree actually contains 0 entries. - * - the value of <RootPtr> is NULL, in which case the tree is - * assumed to be empty - * - the value of <FreeNode> is NULL, in which case entries - * cannot be removed, so 0 is returned. *Make sure that you - * provide a valid value for <FreeNode>*. - * In all other cases, you should get a positive value equal to - * the value of RootPtr->count upon entry. - * - * ------------------------------------------------------------------------ ** - */ - -ubi_btNodePtr ubi_btLeafNode( ubi_btNodePtr leader ); - /* ------------------------------------------------------------------------ ** - * Returns a pointer to a leaf node. - * - * Input: leader - Pointer to a node at which to start the descent. - * - * Output: A pointer to a leaf node, selected in a somewhat arbitrary - * manner but with an effort to dig deep. - * - * Notes: I wrote this function because I was using splay trees as a - * database cache. The cache had a maximum size on it, and I - * needed a way of choosing a node to sacrifice if the cache - * became full. In a splay tree, less recently accessed nodes - * tend toward the bottom of the tree, meaning that leaf nodes - * are good candidates for removal. (I really can't think of - * any other reason to use this function.) - * + In a simple binary tree, or in an AVL tree, the most recently - * added nodes tend to be nearer the bottom, making this a *bad* - * way to choose which node to remove from the cache. - * + Randomizing the traversal order is probably a good idea. You - * can improve the randomization of leaf node selection by passing - * in pointers to nodes other than the root node each time. A - * pointer to any node in the tree will do. Of course, if you - * pass a pointer to a leaf node you'll get the same thing back. - * + In an unbalanced splay tree, if you simply traverse downward - * until you hit a leaf node it is possible to accidentally - * stumble onto a short path. The result will be a leaf node - * that is actually very high in the tree--possibly a very - * recently accessed node. Not good. This function can follow - * multiple paths in an effort to find a leaf node deeper - * in the tree. Following a single path, of course, is the - * fastest way to find a leaf node. A complete traversal would - * be sure to find the deepest leaf but would be very costly in - * terms of time. This function uses a compromise that has - * worked well in testing. - * - * ------------------------------------------------------------------------ ** - */ - - -int ubi_btModuleID( int size, char *list[] ); - /* ------------------------------------------------------------------------ ** - * Returns a set of strings that identify the module. - * - * Input: size - The number of elements in the array <list>. - * list - An array of pointers of type (char *). This array - * should, initially, be empty. This function will fill - * in the array with pointers to strings. - * Output: The number of elements of <list> that were used. If this value - * is less than <size>, the values of the remaining elements are - * not guaranteed. - * - * Notes: Please keep in mind that the pointers returned indicate strings - * stored in static memory. Don't free() them, don't write over - * them, etc. Just read them. - * ------------------------------------------------------------------------ ** - */ - -/* -------------------------------------------------------------------------- ** - * Masquarade... - * - * This set of defines allows you to write programs that will use any of the - * implemented binary tree modules (currently BinTree, AVLtree, and SplayTree). - * Instead of using ubi_bt..., use ubi_tr..., and select the tree type by - * including the appropriate module header. - */ - -#define ubi_trItemPtr ubi_btItemPtr - -#define ubi_trNode ubi_btNode -#define ubi_trNodePtr ubi_btNodePtr - -#define ubi_trRoot ubi_btRoot -#define ubi_trRootPtr ubi_btRootPtr - -#define ubi_trCompFunc ubi_btCompFunc -#define ubi_trActionRtn ubi_btActionRtn -#define ubi_trKillNodeRtn ubi_btKillNodeRtn - -#define ubi_trSgn( x ) ubi_btSgn( x ) - -#define ubi_trInitNode( Np ) ubi_btInitNode( (ubi_btNodePtr)(Np) ) - -#define ubi_trInitTree( Rp, Cf, Fl ) \ - ubi_btInitTree( (ubi_btRootPtr)(Rp), (ubi_btCompFunc)(Cf), (Fl) ) - -#define ubi_trInsert( Rp, Nn, Ip, On ) \ - ubi_btInsert( (ubi_btRootPtr)(Rp), (ubi_btNodePtr)(Nn), \ - (ubi_btItemPtr)(Ip), (ubi_btNodePtr *)(On) ) - -#define ubi_trRemove( Rp, Dn ) \ - ubi_btRemove( (ubi_btRootPtr)(Rp), (ubi_btNodePtr)(Dn) ) - -#define ubi_trLocate( Rp, Ip, Op ) \ - ubi_btLocate( (ubi_btRootPtr)(Rp), \ - (ubi_btItemPtr)(Ip), \ - (ubi_trCompOps)(Op) ) - -#define ubi_trFind( Rp, Ip ) \ - ubi_btFind( (ubi_btRootPtr)(Rp), (ubi_btItemPtr)(Ip) ) - -#define ubi_trNext( P ) ubi_btNext( (ubi_btNodePtr)(P) ) - -#define ubi_trPrev( P ) ubi_btPrev( (ubi_btNodePtr)(P) ) - -#define ubi_trFirst( P ) ubi_btFirst( (ubi_btNodePtr)(P) ) - -#define ubi_trLast( P ) ubi_btLast( (ubi_btNodePtr)(P) ) - -#define ubi_trFirstOf( Rp, Ip, P ) \ - ubi_btFirstOf( (ubi_btRootPtr)(Rp), \ - (ubi_btItemPtr)(Ip), \ - (ubi_btNodePtr)(P) ) - -#define ubi_trLastOf( Rp, Ip, P ) \ - ubi_btLastOf( (ubi_btRootPtr)(Rp), \ - (ubi_btItemPtr)(Ip), \ - (ubi_btNodePtr)(P) ) - -#define ubi_trTraverse( Rp, En, Ud ) \ - ubi_btTraverse((ubi_btRootPtr)(Rp), (ubi_btActionRtn)(En), (void *)(Ud)) - -#define ubi_trKillTree( Rp, Fn ) \ - ubi_btKillTree( (ubi_btRootPtr)(Rp), (ubi_btKillNodeRtn)(Fn) ) - -#define ubi_trLeafNode( Nd ) \ - ubi_btLeafNode( (ubi_btNodePtr)(Nd) ) - -#define ubi_trModuleID( s, l ) ubi_btModuleID( s, l ) - -/* ========================================================================== */ -#endif /* UBI_BINTREE_H */ diff --git a/source3/ubiqx/ubi_Cache.c b/source3/ubiqx/ubi_Cache.c deleted file mode 100644 index f428dcefe9..0000000000 --- a/source3/ubiqx/ubi_Cache.c +++ /dev/null @@ -1,505 +0,0 @@ -/* ========================================================================== ** - * ubi_Cache.c - * - * Copyright (C) 1997 by Christopher R. Hertel - * - * Email: crh@ubiqx.mn.org - * -------------------------------------------------------------------------- ** - * - * This module implements a generic cache. - * - * -------------------------------------------------------------------------- ** - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Library General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Library General Public License for more details. - * - * You should have received a copy of the GNU Library General Public - * License along with this library; if not, write to the Free - * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - * - * -------------------------------------------------------------------------- ** - * - * This module uses a splay tree to implement a simple cache. The cache - * module adds a thin layer of functionality to the splay tree. In - * particular: - * - * - The tree (cache) may be limited in size by the number of - * entries permitted or the amount of memory used. When either - * limit is exceeded cache entries are removed until the cache - * conforms. - * - Some statistical information is kept so that an approximate - * "hit ratio" can be calculated. - * - There are several functions available that provide access to - * and management of cache size limits, hit ratio, and tree - * trimming. - * - * The splay tree is used because recently accessed items tend toward the - * top of the tree and less recently accessed items tend toward the bottom. - * This makes it easy to purge less recently used items should the cache - * exceed its limits. - * - * To use this module, you will need to supply a comparison function of - * type ubi_trCompFunc and a node-freeing function of type - * ubi_trKillNodeRtn. See ubi_BinTree.h for more information on - * these. (This is all basic ubiqx tree management stuff.) - * - * Notes: - * - * - Cache performance will start to suffer dramatically if the - * cache becomes large enough to force the OS to start swapping - * memory to disk. This is because the nodes of the underlying tree - * will be scattered across memory in an order that is completely - * unrelated to their traversal order. As more and more of the - * cache is placed into swap space, more and more swaps will be - * required for a simple traversal (...and then there's the splay - * operation). - * - * In one simple test under Linux, the load and dump of a cache of - * 400,000 entries took only 1min, 40sec of real time. The same - * test with 450,000 records took 2 *hours* and eight minutes. - * - * - In an effort to save memory, I considered using an unsigned - * short to save the per-entry entry size. I would have tucked this - * value into some unused space in the tree node structure. On - * 32-bit word aligned systems this would have saved an additional - * four bytes per entry. I may revisit this issue, but for now I've - * decided against it. - * - * Using an unsigned short would limit the size of an entry to 64K - * bytes. That's probably more than enough for most applications. - * The key word in that last sentence, however, is "probably". I - * really dislike imposing such limits on things. - * - * - Each entry keeps track of the amount of memory it used and the - * cache header keeps the total. This information is provided via - * the EntrySize parameter in ubi_cachePut(), so it is up to you to - * make sure that the numbers are accurate. (The numbers don't even - * have to represent bytes used.) - * - * As you consider this, note that the strdup() function--as an - * example--will call malloc(). The latter generally allocates a - * multiple of the system word size, which may be more than the - * number of bytes needed to store the string. - * - * -------------------------------------------------------------------------- ** - * - * Log: ubi_Cache.c,v - * Revision 0.4 1999/09/22 03:42:24 crh - * Fixed a minor typo. - * - * Revision 0.3 1998/06/03 18:00:15 crh - * Further fiddling with sys_include.h, which is no longer explicitly - * included by this module since it is inherited from ubi_BinTree.h. - * - * Revision 0.2 1998/06/02 01:36:18 crh - * Changed include name from ubi_null.h to sys_include.h to make it - * more generic. - * - * Revision 0.1 1998/05/20 04:36:02 crh - * The C file now includes ubi_null.h. See ubi_null.h for more info. - * - * Revision 0.0 1997/12/18 06:24:33 crh - * Initial Revision. - * - * ========================================================================== ** - */ - -#include "ubi_Cache.h" /* Header for *this* module. */ - -/* -------------------------------------------------------------------------- ** - * Static data... - */ - -/* commented out until I make use of it... -static char ModuleID[] = -"ubi_Cache\n\ -\tRevision: 0.4 \n\ -\tDate: 1999/09/22 03:42:24 \n\ -\tAuthor: crh \n"; -*/ - -/* -------------------------------------------------------------------------- ** - * Internal functions... - */ - -static void free_entry( ubi_cacheRootPtr CachePtr, ubi_cacheEntryPtr EntryPtr ) - /* ------------------------------------------------------------------------ ** - * Free a ubi_cacheEntry, and adjust the mem_used counter accordingly. - * - * Input: CachePtr - A pointer to the cache from which the entry has - * been removed. - * EntryPtr - A pointer to the already removed entry. - * - * Output: none. - * - * Notes: The entry must be removed from the cache *before* this function - * is called!!!! - * ------------------------------------------------------------------------ ** - */ - { - CachePtr->mem_used -= EntryPtr->entry_size; - (*CachePtr->free_func)( (void *)EntryPtr ); - } /* free_entry */ - -static void cachetrim( ubi_cacheRootPtr crptr ) - /* ------------------------------------------------------------------------ ** - * Remove entries from the cache until the number of entries and the amount - * of memory used are *both* below or at the maximum. - * - * Input: crptr - pointer to the cache to be trimmed. - * - * Output: None. - * - * ------------------------------------------------------------------------ ** - */ - { - while( ( crptr->max_entries && (crptr->max_entries < crptr->root.count) ) - || ( crptr->max_memory && (crptr->max_memory < crptr->mem_used) ) ) - { - if( !ubi_cacheReduce( crptr, 1 ) ) - return; - } - } /* cachetrim */ - - -/* -------------------------------------------------------------------------- ** - * Exported functions... - */ - -ubi_cacheRootPtr ubi_cacheInit( ubi_cacheRootPtr CachePtr, - ubi_trCompFunc CompFunc, - ubi_trKillNodeRtn FreeFunc, - unsigned long MaxEntries, - unsigned long MaxMemory ) - /* ------------------------------------------------------------------------ ** - * Initialize a cache header structure. - * - * Input: CachePtr - A pointer to a ubi_cacheRoot structure that is - * to be initialized. - * CompFunc - A pointer to the function that will be called - * to compare two cache values. See the module - * comments, above, for more information. - * FreeFunc - A pointer to a function that will be called - * to free a cache entry. If you allocated - * the cache entry using malloc(), then this - * will likely be free(). If you are allocating - * cache entries from a free list, then this will - * likely be a function that returns memory to the - * free list, etc. - * MaxEntries - The maximum number of entries that will be - * allowed to exist in the cache. If this limit - * is exceeded, then existing entries will be - * removed from the cache. A value of zero - * indicates that there is no limit on the number - * of cache entries. See ubi_cachePut(). - * MaxMemory - The maximum amount of memory, in bytes, to be - * allocated to the cache (excluding the cache - * header). If this is exceeded, existing entries - * in the cache will be removed until enough memory - * has been freed to meet the condition. See - * ubi_cachePut(). - * - * Output: A pointer to the initialized cache (i.e., the same as CachePtr). - * - * Notes: Both MaxEntries and MaxMemory may be changed after the cache - * has been created. See - * ubi_cacheSetMaxEntries() - * ubi_cacheSetMaxMemory() - * ubi_cacheGetMaxEntries() - * ubi_cacheGetMaxMemory() (the latter two are macros). - * - * - Memory is allocated in multiples of the word size. The - * return value of the strlen() function does not reflect - * this; it will allways be less than or equal to the amount - * of memory actually allocated. Keep this in mind when - * choosing a value for MaxMemory. - * - * ------------------------------------------------------------------------ ** - */ - { - if( CachePtr ) - { - (void)ubi_trInitTree( CachePtr, CompFunc, ubi_trOVERWRITE ); - CachePtr->free_func = FreeFunc; - CachePtr->max_entries = MaxEntries; - CachePtr->max_memory = MaxMemory; - CachePtr->mem_used = 0; - CachePtr->cache_hits = 0; - CachePtr->cache_trys = 0; - } - return( CachePtr ); - } /* ubi_cacheInit */ - -ubi_cacheRootPtr ubi_cacheClear( ubi_cacheRootPtr CachePtr ) - /* ------------------------------------------------------------------------ ** - * Remove and free all entries in an existing cache. - * - * Input: CachePtr - A pointer to the cache that is to be cleared. - * - * Output: A pointer to the cache header (i.e., the same as CachePtr). - * This function re-initializes the cache header. - * - * ------------------------------------------------------------------------ ** - */ - { - if( CachePtr ) - { - (void)ubi_trKillTree( CachePtr, CachePtr->free_func ); - CachePtr->mem_used = 0; - CachePtr->cache_hits = 0; - CachePtr->cache_trys = 0; - } - return( CachePtr ); - } /* ubi_cacheClear */ - -void ubi_cachePut( ubi_cacheRootPtr CachePtr, - unsigned long EntrySize, - ubi_cacheEntryPtr EntryPtr, - ubi_trItemPtr Key ) - /* ------------------------------------------------------------------------ ** - * Add an entry to the cache. - * - * Input: CachePtr - A pointer to the cache into which the entry - * will be added. - * EntrySize - The size, in bytes, of the memory block indicated - * by EntryPtr. This will be copied into the - * EntryPtr->entry_size field. - * EntryPtr - A pointer to a memory block that begins with a - * ubi_cacheEntry structure. The entry structure - * should be followed immediately by the data to be - * cached (even if that is a pointer to yet more data). - * Key - Pointer used to identify the lookup key within the - * Entry. - * - * Output: None. - * - * Notes: After adding the new node, the cache is "trimmed". This - * removes extra nodes if the tree has exceeded it's memory or - * entry count limits. It is unlikely that the newly added node - * will be purged from the cache (assuming a reasonably large - * cache), since new nodes in a splay tree (which is what this - * module was designed to use) are moved to the top of the tree - * and the cache purge process removes nodes from the bottom of - * the tree. - * - The underlying splay tree is opened in OVERWRITE mode. If - * the input key matches an existing key, the existing entry will - * be politely removed from the tree and freed. - * - Memory is allocated in multiples of the word size. The - * return value of the strlen() function does not reflect - * this; it will allways be less than or equal to the amount - * of memory actually allocated. - * - * ------------------------------------------------------------------------ ** - */ - { - ubi_trNodePtr OldNode; - - EntryPtr->entry_size = EntrySize; - CachePtr->mem_used += EntrySize; - (void)ubi_trInsert( CachePtr, EntryPtr, Key, &OldNode ); - if( OldNode ) - free_entry( CachePtr, (ubi_cacheEntryPtr)OldNode ); - - cachetrim( CachePtr ); - } /* ubi_cachePut */ - -ubi_cacheEntryPtr ubi_cacheGet( ubi_cacheRootPtr CachePtr, - ubi_trItemPtr FindMe ) - /* ------------------------------------------------------------------------ ** - * Attempt to retrieve an entry from the cache. - * - * Input: CachePtr - A ponter to the cache that is to be searched. - * FindMe - A ubi_trItemPtr that indicates the key for which - * to search. - * - * Output: A pointer to the cache entry that was found, or NULL if no - * matching entry was found. - * - * Notes: This function also updates the hit ratio counters. - * The counters are unsigned short. If the number of cache tries - * reaches 32768, then both the number of tries and the number of - * hits are divided by two. This prevents the counters from - * overflowing. See the comments in ubi_cacheHitRatio() for - * additional notes. - * - * ------------------------------------------------------------------------ ** - */ - { - ubi_trNodePtr FoundPtr; - - FoundPtr = ubi_trFind( CachePtr, FindMe ); - - if( FoundPtr ) - CachePtr->cache_hits++; - CachePtr->cache_trys++; - - if( CachePtr->cache_trys & 0x8000 ) - { - CachePtr->cache_hits = CachePtr->cache_hits / 2; - CachePtr->cache_trys = CachePtr->cache_trys / 2; - } - - return( (ubi_cacheEntryPtr)FoundPtr ); - } /* ubi_cacheGet */ - -ubi_trBool ubi_cacheDelete( ubi_cacheRootPtr CachePtr, ubi_trItemPtr DeleteMe ) - /* ------------------------------------------------------------------------ ** - * Find and delete the specified cache entry. - * - * Input: CachePtr - A pointer to the cache. - * DeleteMe - The key of the entry to be deleted. - * - * Output: TRUE if the entry was found & freed, else FALSE. - * - * ------------------------------------------------------------------------ ** - */ - { - ubi_trNodePtr FoundPtr; - - FoundPtr = ubi_trFind( CachePtr, DeleteMe ); - if( FoundPtr ) - { - (void)ubi_trRemove( CachePtr, FoundPtr ); - free_entry( CachePtr, (ubi_cacheEntryPtr)FoundPtr ); - return( ubi_trTRUE ); - } - return( ubi_trFALSE ); - } /* ubi_cacheDelete */ - -ubi_trBool ubi_cacheReduce( ubi_cacheRootPtr CachePtr, unsigned long count ) - /* ------------------------------------------------------------------------ ** - * Remove <count> entries from the bottom of the cache. - * - * Input: CachePtr - A pointer to the cache which is to be reduced in - * size. - * count - The number of entries to remove. - * - * Output: The function will return TRUE if <count> entries were removed, - * else FALSE. A return value of FALSE should indicate that - * there were less than <count> entries in the cache, and that the - * cache is now empty. - * - * Notes: This function forces a reduction in the number of cache entries - * without requiring that the MaxMemory or MaxEntries values be - * changed. - * - * ------------------------------------------------------------------------ ** - */ - { - ubi_trNodePtr NodePtr; - - while( count ) - { - NodePtr = ubi_trLeafNode( CachePtr->root.root ); - if( NULL == NodePtr ) - return( ubi_trFALSE ); - else - { - (void)ubi_trRemove( CachePtr, NodePtr ); - free_entry( CachePtr, (ubi_cacheEntryPtr)NodePtr ); - } - count--; - } - return( ubi_trTRUE ); - } /* ubi_cacheReduce */ - -unsigned long ubi_cacheSetMaxEntries( ubi_cacheRootPtr CachePtr, - unsigned long NewSize ) - /* ------------------------------------------------------------------------ ** - * Change the maximum number of entries allowed to exist in the cache. - * - * Input: CachePtr - A pointer to the cache to be modified. - * NewSize - The new maximum number of cache entries. - * - * Output: The maximum number of entries previously allowed to exist in - * the cache. - * - * Notes: If the new size is less than the old size, this function will - * trim the cache (remove excess entries). - * - A value of zero indicates an unlimited number of entries. - * - * ------------------------------------------------------------------------ ** - */ - { - unsigned long oldsize = CachePtr->max_entries; /* Save the old value. */ - - CachePtr->max_entries = NewSize; /* Apply the new value. */ - if( (NewSize < oldsize) || (NewSize && !oldsize) ) /* If size is smaller, */ - cachetrim( CachePtr ); /* remove excess. */ - return( oldsize ); - } /* ubi_cacheSetMaxEntries */ - -unsigned long ubi_cacheSetMaxMemory( ubi_cacheRootPtr CachePtr, - unsigned long NewSize ) - /* ------------------------------------------------------------------------ ** - * Change the maximum amount of memory to be used for storing cache - * entries. - * - * Input: CachePtr - A pointer to the cache to be modified. - * NewSize - The new cache memory size. - * - * Output: The previous maximum memory size. - * - * Notes: If the new size is less than the old size, this function will - * trim the cache (remove excess entries). - * - A value of zero indicates that the cache has no memory limit. - * - * ------------------------------------------------------------------------ ** - */ - { - unsigned long oldsize = CachePtr->max_memory; /* Save the old value. */ - - CachePtr->max_memory = NewSize; /* Apply the new value. */ - if( (NewSize < oldsize) || (NewSize && !oldsize) ) /* If size is smaller, */ - cachetrim( CachePtr ); /* remove excess. */ - return( oldsize ); - } /* ubi_cacheSetMaxMemory */ - -int ubi_cacheHitRatio( ubi_cacheRootPtr CachePtr ) - /* ------------------------------------------------------------------------ ** - * Returns a value that is 10,000 times the slightly weighted average hit - * ratio for the cache. - * - * Input: CachePtr - Pointer to the cache to be queried. - * - * Output: An integer that is 10,000 times the number of successful - * cache hits divided by the number of cache lookups, or: - * (10000 * hits) / trys - * You can easily convert this to a float, or do something - * like this (where i is the return value of this function): - * - * printf( "Hit rate : %d.%02d%%\n", (i/100), (i%100) ); - * - * Notes: I say "slightly-weighted", because the numerator and - * denominator are both accumulated in locations of type - * 'unsigned short'. If the number of cache trys becomes - * large enough, both are divided by two. (See function - * ubi_cacheGet().) - * Dividing both numerator and denominator by two does not - * change the ratio (much...it is an integer divide), but it - * does mean that subsequent increments to either counter will - * have twice as much significance as previous ones. - * - * - The value returned by this function will be in the range - * [0..10000] because ( 0 <= cache_hits <= cache_trys ) will - * always be true. - * - * ------------------------------------------------------------------------ ** - */ - { - int tmp = 0; - - if( CachePtr->cache_trys ) - tmp = (int)( (10000 * (long)(CachePtr->cache_hits) ) - / (long)(CachePtr->cache_trys) ); - return( tmp ); - } /* ubi_cacheHitRatio */ - -/* -------------------------------------------------------------------------- */ diff --git a/source3/ubiqx/ubi_Cache.h b/source3/ubiqx/ubi_Cache.h deleted file mode 100644 index 0fc3a074f7..0000000000 --- a/source3/ubiqx/ubi_Cache.h +++ /dev/null @@ -1,412 +0,0 @@ -#ifndef UBI_CACHE_H -#define UBI_CACHE_H -/* ========================================================================== ** - * ubi_Cache.h - * - * Copyright (C) 1997 by Christopher R. Hertel - * - * Email: crh@ubiqx.mn.org - * -------------------------------------------------------------------------- ** - * - * This module implements a generic cache. - * - * -------------------------------------------------------------------------- ** - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Library General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Library General Public License for more details. - * - * You should have received a copy of the GNU Library General Public - * License along with this library; if not, write to the Free - * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - * - * -------------------------------------------------------------------------- ** - * - * This module uses a splay tree to implement a simple cache. The cache - * module adds a thin layer of functionality to the splay tree. In - * particular: - * - * - The tree (cache) may be limited in size by the number of - * entries permitted or the amount of memory used. When either - * limit is exceeded cache entries are removed until the cache - * conforms. - * - Some statistical information is kept so that an approximate - * "hit ratio" can be calculated. - * - There are several functions available that provide access to - * and management of cache size limits, hit ratio, and tree - * trimming. - * - * The splay tree is used because recently accessed items tend toward the - * top of the tree and less recently accessed items tend toward the bottom. - * This makes it easy to purge less recently used items should the cache - * exceed its limits. - * - * To use this module, you will need to supply a comparison function of - * type ubi_trCompFunc and a node-freeing function of type - * ubi_trKillNodeRtn. See ubi_BinTree.h for more information on - * these. (This is all basic ubiqx tree management stuff.) - * - * Notes: - * - * - Cache performance will start to suffer dramatically if the - * cache becomes large enough to force the OS to start swapping - * memory to disk. This is because the nodes of the underlying tree - * will be scattered across memory in an order that is completely - * unrelated to their traversal order. As more and more of the - * cache is placed into swap space, more and more swaps will be - * required for a simple traversal (...and then there's the splay - * operation). - * - * In one simple test under Linux, the load and dump of a cache of - * 400,000 entries took only 1min, 40sec of real time. The same - * test with 450,000 records took 2 *hours* and eight minutes. - * - * - In an effort to save memory, I considered using an unsigned - * short to save the per-entry entry size. I would have tucked this - * value into some unused space in the tree node structure. On - * 32-bit word aligned systems this would have saved an additional - * four bytes per entry. I may revisit this issue, but for now I've - * decided against it. - * - * Using an unsigned short would limit the size of an entry to 64K - * bytes. That's probably more than enough for most applications. - * The key word in that last sentence, however, is "probably". I - * really dislike imposing such limits on things. - * - * - Each entry keeps track of the amount of memory it used and the - * cache header keeps the total. This information is provided via - * the EntrySize parameter in ubi_cachePut(), so it is up to you to - * make sure that the numbers are accurate. (The numbers don't even - * have to represent bytes used.) - * - * As you consider this, note that the strdup() function--as an - * example--will call malloc(). The latter generally allocates a - * multiple of the system word size, which may be more than the - * number of bytes needed to store the string. - * - * -------------------------------------------------------------------------- ** - * - * Log: ubi_Cache.h,v - * Revision 0.4 1999/09/22 03:42:24 crh - * Fixed a minor typo. - * - * Revision 0.3 1998/06/03 18:00:15 crh - * Further fiddling with sys_include.h, which is no longer explicitly - * included by this module since it is inherited from ubi_BinTree.h. - * - * Revision 0.2 1998/06/02 01:36:18 crh - * Changed include name from ubi_null.h to sys_include.h to make it - * more generic. - * - * Revision 0.1 1998/05/20 04:36:02 crh - * The C file now includes ubi_null.h. See ubi_null.h for more info. - * - * Revision 0.0 1997/12/18 06:25:23 crh - * Initial Revision. - * - * ========================================================================== ** - */ - -#include "ubi_SplayTree.h" - -/* -------------------------------------------------------------------------- ** - * Typedefs... - * - * ubi_cacheRoot - Cache header structure, which consists of a binary - * tree root and other required housekeeping fields, as - * listed below. - * ubi_cacheRootPtr - Pointer to a Cache. - * - * ubi_cacheEntry - A cache Entry, which consists of a tree node - * structure and the size (in bytes) of the entry - * data. The entry size should be supplied via - * the EntrySize parameter of the ubi_cachePut() - * function. - * - * ubi_cacheEntryPtr - Pointer to a ubi_cacheEntry. - * - */ - -typedef struct - { - ubi_trRoot root; /* Splay tree control structure. */ - ubi_trKillNodeRtn free_func; /* Function used to free entries. */ - unsigned long max_entries; /* Max cache entries. 0 == unlimited */ - unsigned long max_memory; /* Max memory to use. 0 == unlimited */ - unsigned long mem_used; /* Memory currently in use (bytes). */ - unsigned short cache_hits; /* Incremented on succesful find. */ - unsigned short cache_trys; /* Incremented on cache lookup. */ - } ubi_cacheRoot; - -typedef ubi_cacheRoot *ubi_cacheRootPtr; - - -typedef struct - { - ubi_trNode node; /* Tree node structure. */ - unsigned long entry_size; /* Entry size. Used when managing - * caches with maximum memory limits. - */ - } ubi_cacheEntry; - -typedef ubi_cacheEntry *ubi_cacheEntryPtr; - - -/* -------------------------------------------------------------------------- ** - * Macros... - * - * ubi_cacheGetMaxEntries() - Report the current maximum number of entries - * allowed in the cache. Zero indicates no - * maximum. - * ubi_cacheGetMaxMemory() - Report the current maximum amount of memory - * that may be used in the cache. Zero - * indicates no maximum. - * ubi_cacheGetEntryCount() - Report the current number of entries in the - * cache. - * ubi_cacheGetMemUsed() - Report the amount of memory currently in use - * by the cache. - */ - -#define ubi_cacheGetMaxEntries( Cptr ) (((ubi_cacheRootPtr)(Cptr))->max_entries) -#define ubi_cacheGetMaxMemory( Cptr ) (((ubi_cacheRootPtr)(Cptr))->max_memory) - -#define ubi_cacheGetEntryCount( Cptr ) (((ubi_cacheRootPtr)(Cptr))->root.count) -#define ubi_cacheGetMemUsed( Cptr ) (((ubi_cacheRootPtr)(Cptr))->mem_used) - -/* -------------------------------------------------------------------------- ** - * Prototypes... - */ - -ubi_cacheRootPtr ubi_cacheInit( ubi_cacheRootPtr CachePtr, - ubi_trCompFunc CompFunc, - ubi_trKillNodeRtn FreeFunc, - unsigned long MaxEntries, - unsigned long MaxMemory ); - /* ------------------------------------------------------------------------ ** - * Initialize a cache header structure. - * - * Input: CachePtr - A pointer to a ubi_cacheRoot structure that is - * to be initialized. - * CompFunc - A pointer to the function that will be called - * to compare two cache values. See the module - * comments, above, for more information. - * FreeFunc - A pointer to a function that will be called - * to free a cache entry. If you allocated - * the cache entry using malloc(), then this - * will likely be free(). If you are allocating - * cache entries from a free list, then this will - * likely be a function that returns memory to the - * free list, etc. - * MaxEntries - The maximum number of entries that will be - * allowed to exist in the cache. If this limit - * is exceeded, then existing entries will be - * removed from the cache. A value of zero - * indicates that there is no limit on the number - * of cache entries. See ubi_cachePut(). - * MaxMemory - The maximum amount of memory, in bytes, to be - * allocated to the cache (excluding the cache - * header). If this is exceeded, existing entries - * in the cache will be removed until enough memory - * has been freed to meet the condition. See - * ubi_cachePut(). - * - * Output: A pointer to the initialized cache (i.e., the same as CachePtr). - * - * Notes: Both MaxEntries and MaxMemory may be changed after the cache - * has been created. See - * ubi_cacheSetMaxEntries() - * ubi_cacheSetMaxMemory() - * ubi_cacheGetMaxEntries() - * ubi_cacheGetMaxMemory() (the latter two are macros). - * - * - Memory is allocated in multiples of the word size. The - * return value of the strlen() function does not reflect - * this; it will allways be less than or equal to the amount - * of memory actually allocated. Keep this in mind when - * choosing a value for MaxMemory. - * - * ------------------------------------------------------------------------ ** - */ - -ubi_cacheRootPtr ubi_cacheClear( ubi_cacheRootPtr CachePtr ); - /* ------------------------------------------------------------------------ ** - * Remove and free all entries in an existing cache. - * - * Input: CachePtr - A pointer to the cache that is to be cleared. - * - * Output: A pointer to the cache header (i.e., the same as CachePtr). - * This function re-initializes the cache header. - * - * ------------------------------------------------------------------------ ** - */ - -void ubi_cachePut( ubi_cacheRootPtr CachePtr, - unsigned long EntrySize, - ubi_cacheEntryPtr EntryPtr, - ubi_trItemPtr Key ); - /* ------------------------------------------------------------------------ ** - * Add an entry to the cache. - * - * Input: CachePtr - A pointer to the cache into which the entry - * will be added. - * EntrySize - The size, in bytes, of the memory block indicated - * by EntryPtr. This will be copied into the - * EntryPtr->entry_size field. - * EntryPtr - A pointer to a memory block that begins with a - * ubi_cacheEntry structure. The entry structure - * should be followed immediately by the data to be - * cached (even if that is a pointer to yet more data). - * Key - Pointer used to identify the lookup key within the - * Entry. - * - * Output: None. - * - * Notes: After adding the new node, the cache is "trimmed". This - * removes extra nodes if the tree has exceeded it's memory or - * entry count limits. It is unlikely that the newly added node - * will be purged from the cache (assuming a reasonably large - * cache), since new nodes in a splay tree (which is what this - * module was designed to use) are moved to the top of the tree - * and the cache purge process removes nodes from the bottom of - * the tree. - * - The underlying splay tree is opened in OVERWRITE mode. If - * the input key matches an existing key, the existing entry will - * be politely removed from the tree and freed. - * - Memory is allocated in multiples of the word size. The - * return value of the strlen() function does not reflect - * this; it will allways be less than or equal to the amount - * of memory actually allocated. - * - * ------------------------------------------------------------------------ ** - */ - -ubi_cacheEntryPtr ubi_cacheGet( ubi_cacheRootPtr CachePtr, - ubi_trItemPtr FindMe ); - /* ------------------------------------------------------------------------ ** - * Attempt to retrieve an entry from the cache. - * - * Input: CachePtr - A ponter to the cache that is to be searched. - * FindMe - A ubi_trItemPtr that indicates the key for which - * to search. - * - * Output: A pointer to the cache entry that was found, or NULL if no - * matching entry was found. - * - * Notes: This function also updates the hit ratio counters. - * The counters are unsigned short. If the number of cache tries - * reaches 32768, then both the number of tries and the number of - * hits are divided by two. This prevents the counters from - * overflowing. See the comments in ubi_cacheHitRatio() for - * additional notes. - * - * ------------------------------------------------------------------------ ** - */ - -ubi_trBool ubi_cacheDelete( ubi_cacheRootPtr CachePtr, ubi_trItemPtr DeleteMe ); - /* ------------------------------------------------------------------------ ** - * Find and delete the specified cache entry. - * - * Input: CachePtr - A pointer to the cache. - * DeleteMe - The key of the entry to be deleted. - * - * Output: TRUE if the entry was found & freed, else FALSE. - * - * ------------------------------------------------------------------------ ** - */ - -ubi_trBool ubi_cacheReduce( ubi_cacheRootPtr CachePtr, unsigned long count ); - /* ------------------------------------------------------------------------ ** - * Remove <count> entries from the bottom of the cache. - * - * Input: CachePtr - A pointer to the cache which is to be reduced in - * size. - * count - The number of entries to remove. - * - * Output: The function will return TRUE if <count> entries were removed, - * else FALSE. A return value of FALSE should indicate that - * there were less than <count> entries in the cache, and that the - * cache is now empty. - * - * Notes: This function forces a reduction in the number of cache entries - * without requiring that the MaxMemory or MaxEntries values be - * changed. - * - * ------------------------------------------------------------------------ ** - */ - -unsigned long ubi_cacheSetMaxEntries( ubi_cacheRootPtr CachePtr, - unsigned long NewSize ); - /* ------------------------------------------------------------------------ ** - * Change the maximum number of entries allowed to exist in the cache. - * - * Input: CachePtr - A pointer to the cache to be modified. - * NewSize - The new maximum number of cache entries. - * - * Output: The maximum number of entries previously allowed to exist in - * the cache. - * - * Notes: If the new size is less than the old size, this function will - * trim the cache (remove excess entries). - * - A value of zero indicates an unlimited number of entries. - * - * ------------------------------------------------------------------------ ** - */ - -unsigned long ubi_cacheSetMaxMemory( ubi_cacheRootPtr CachePtr, - unsigned long NewSize ); - /* ------------------------------------------------------------------------ ** - * Change the maximum amount of memory to be used for storing cache - * entries. - * - * Input: CachePtr - A pointer to the cache to be modified. - * NewSize - The new cache memory size. - * - * Output: The previous maximum memory size. - * - * Notes: If the new size is less than the old size, this function will - * trim the cache (remove excess entries). - * - A value of zero indicates that the cache has no memory limit. - * - * ------------------------------------------------------------------------ ** - */ - -int ubi_cacheHitRatio( ubi_cacheRootPtr CachePtr ); - /* ------------------------------------------------------------------------ ** - * Returns a value that is 10,000 times the slightly weighted average hit - * ratio for the cache. - * - * Input: CachePtr - Pointer to the cache to be queried. - * - * Output: An integer that is 10,000 times the number of successful - * cache hits divided by the number of cache lookups, or: - * (10000 * hits) / trys - * You can easily convert this to a float, or do something - * like this (where i is the return value of this function): - * - * printf( "Hit rate : %d.%02d%%\n", (i/100), (i%100) ); - * - * Notes: I say "slightly-weighted", because the numerator and - * denominator are both accumulated in locations of type - * 'unsigned short'. If the number of cache trys becomes - * large enough, both are divided by two. (See function - * ubi_cacheGet().) - * Dividing both numerator and denominator by two does not - * change the ratio (much...it is an integer divide), but it - * does mean that subsequent increments to either counter will - * have twice as much significance as previous ones. - * - * - The value returned by this function will be in the range - * [0..10000] because ( 0 <= cache_hits <= cache_trys ) will - * always be true. - * - * ------------------------------------------------------------------------ ** - */ - -/* -------------------------------------------------------------------------- */ -#endif /* ubi_CACHE_H */ diff --git a/source3/ubiqx/ubi_SplayTree.c b/source3/ubiqx/ubi_SplayTree.c deleted file mode 100644 index 222506bd06..0000000000 --- a/source3/ubiqx/ubi_SplayTree.c +++ /dev/null @@ -1,512 +0,0 @@ -/* ========================================================================== ** - * ubi_SplayTree.c - * - * Copyright (C) 1993-1998 by Christopher R. Hertel - * - * Email: crh@ubiqx.mn.org - * -------------------------------------------------------------------------- ** - * - * This module implements "splay" trees. Splay trees are binary trees - * that are rearranged (splayed) whenever a node is accessed. The - * splaying process *tends* to make the tree bushier (improves balance), - * and the nodes that are accessed most frequently *tend* to be closer to - * the top. - * - * References: "Self-Adjusting Binary Search Trees", by Daniel Sleator and - * Robert Tarjan. Journal of the Association for Computing - * Machinery Vol 32, No. 3, July 1985 pp. 652-686 - * - * See also: http://www.cs.cmu.edu/~sleator/ - * - * -------------------------------------------------------------------------- ** - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Library General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Library General Public License for more details. - * - * You should have received a copy of the GNU Library General Public - * License along with this library; if not, write to the Free - * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - * - * -------------------------------------------------------------------------- ** - * - * Log: ubi_SplayTree.c,v - * Revision 4.5 2000/01/08 23:26:49 crh - * Added ubi_trSplay() macro, which does a type cast for us. - * - * Revision 4.4 1998/06/04 21:29:27 crh - * Upper-cased defined constants (eg UBI_BINTREE_H) in some header files. - * This is more "standard", and is what people expect. Weird, eh? - * - * Revision 4.3 1998/06/03 17:45:05 crh - * Further fiddling with sys_include.h. It's now in ubi_BinTree.h which is - * included by all of the binary tree files. - * - * Also fixed some warnings produced by lint on Irix 6.2, which doesn't seem - * to like syntax like this: - * - * if( (a = b) ) - * - * The fix was to change lines like the above to: - * - * if( 0 != (a=b) ) - * - * Which means the same thing. - * - * Reminder: Some of the ubi_tr* macros in ubi_BinTree.h are redefined in - * ubi_AVLtree.h and ubi_SplayTree.h. This allows easy swapping - * of tree types by simply changing a header. Unfortunately, the - * macro redefinitions in ubi_AVLtree.h and ubi_SplayTree.h will - * conflict if used together. You must either choose a single tree - * type, or use the underlying function calls directly. Compare - * the two header files for more information. - * - * Revision 4.2 1998/06/02 01:29:14 crh - * Changed ubi_null.h to sys_include.h to make it more generic. - * - * Revision 4.1 1998/05/20 04:37:54 crh - * The C file now includes ubi_null.h. See ubi_null.h for more info. - * - * Revision 4.0 1998/03/10 03:41:33 crh - * Minor comment changes. The revision number is now 4.0 to match the - * BinTree and AVLtree modules. - * - * Revision 2.7 1998/01/24 06:37:08 crh - * Added a URL for more information. - * - * Revision 2.6 1997/12/23 04:01:12 crh - * In this version, all constants & macros defined in the header file have - * the ubi_tr prefix. Also cleaned up anything that gcc complained about - * when run with '-pedantic -fsyntax-only -Wall'. - * - * Revision 2.5 1997/07/26 04:15:42 crh - * + Cleaned up a few minor syntax annoyances that gcc discovered for me. - * + Changed ubi_TRUE and ubi_FALSE to ubi_trTRUE and ubi_trFALSE. - * - * Revision 2.4 1997/06/03 04:42:21 crh - * Changed TRUE and FALSE to ubi_TRUE and ubi_FALSE to avoid causing - * problems. - * - * Revision 2.3 1995/10/03 22:19:07 CRH - * Ubisized! - * Also, added the function ubi_sptSplay(). - * - * Revision 2.1 95/03/09 23:54:42 CRH - * Added the ModuleID static string and function. These modules are now - * self-identifying. - * - * Revision 2.0 95/02/27 22:34:46 CRH - * This module was updated to match the interface changes made to the - * ubi_BinTree module. In particular, the interface to the Locate() function - * has changed. See ubi_BinTree for more information on changes and new - * functions. - * - * The revision number was also upped to match ubi_BinTree. - * - * Revision 1.1 93/10/18 20:35:16 CRH - * I removed the hard-coded logical device names from the include file - * specifications. CRH - * - * Revision 1.0 93/10/15 23:00:15 CRH - * With this revision, I have added a set of #define's that provide a single, - * standard API to all existing tree modules. Until now, each of the three - * existing modules had a different function and typedef prefix, as follows: - * - * Module Prefix - * ubi_BinTree ubi_bt - * ubi_AVLtree ubi_avl - * ubi_SplayTree ubi_spt - * - * To further complicate matters, only those portions of the base module - * (ubi_BinTree) that were superceeded in the new module had the new names. - * For example, if you were using ubi_SplayTree, the locate function was - * called "ubi_sptLocate", but the next and previous functions remained - * "ubi_btNext" and "ubi_btPrev". - * - * This was not too terrible if you were familiar with the modules and knew - * exactly which tree model you wanted to use. If you wanted to be able to - * change modules (for speed comparisons, etc), things could get messy very - * quickly. - * - * So, I have added a set of defined names that get redefined in any of the - * descendant modules. To use this standardized interface in your code, - * simply replace all occurances of "ubi_bt", "ubi_avl", and "ubi_spt" with - * "ubi_tr". The "ubi_tr" names will resolve to the correct function or - * datatype names for the module that you are using. Just remember to - * include the header for that module in your program file. Because these - * names are handled by the preprocessor, there is no added run-time - * overhead. - * - * Note that the original names do still exist, and can be used if you wish - * to write code directly to a specific module. This should probably only be - * done if you are planning to implement a new descendant type, such as - * red/black trees. CRH - * - * Revision 0.1 93/04/25 22:03:32 CRH - * Simply changed the <exec/types.h> #include reference the .c file to - * use <stdlib.h> instead. The latter is portable, the former is not. - * - * Revision 0.0 93/04/21 23:05:52 CRH - * Initial version, written by Christopher R. Hertel. - * This module implements Splay Trees using the ubi_BinTree module as a basis. - * - * ========================================================================== ** - */ - -#include "ubi_SplayTree.h" /* Header for THIS module. */ - -/* ========================================================================== ** - * Static data. - */ - -static char ModuleID[] = "ubi_SplayTree\n\ -\tRevision: 4.5 \n\ -\tDate: 2000/01/08 23:26:49 \n\ -\tAuthor: crh \n"; - - -/* ========================================================================== ** - * Private functions... - */ - -static void Rotate( ubi_btNodePtr p ) - /* ------------------------------------------------------------------------ ** - * This function performs a single rotation, moving node *p up one level - * in the tree. - * - * Input: p - a pointer to an ubi_btNode in a tree. - * - * Output: None. - * - * Notes: This implements a single rotation in either direction (left - * or right). This is the basic building block of all splay - * tree rotations. - * ------------------------------------------------------------------------ ** - */ - { - ubi_btNodePtr parentp; - ubi_btNodePtr tmp; - char way; - char revway; - - parentp = p->Link[ubi_trPARENT]; /* Find parent. */ - - if( parentp ) /* If no parent, then we're already the root. */ - { - way = p->gender; - revway = ubi_trRevWay(way); - tmp = p->Link[(int)revway]; - - parentp->Link[(int)way] = tmp; - if( tmp ) - { - tmp->Link[ubi_trPARENT] = parentp; - tmp->gender = way; - } - - tmp = parentp->Link[ubi_trPARENT]; - p->Link[ubi_trPARENT] = tmp; - p->gender = parentp->gender; - if( tmp ) - tmp->Link[(int)(p->gender)] = p; - - parentp->Link[ubi_trPARENT] = p; - parentp->gender = revway; - p->Link[(int)revway] = parentp; - } - } /* Rotate */ - -static ubi_btNodePtr Splay( ubi_btNodePtr SplayWithMe ) - /* ------------------------------------------------------------------------ ** - * Move the node indicated by SplayWithMe to the root of the tree by - * splaying the tree. - * - * Input: SplayWithMe - A pointer to an ubi_btNode within a tree. - * - * Output: A pointer to the root of the splay tree (i.e., the same as - * SplayWithMe). - * ------------------------------------------------------------------------ ** - */ - { - ubi_btNodePtr parent; - - while( NULL != (parent = SplayWithMe->Link[ubi_trPARENT]) ) - { - if( parent->gender == SplayWithMe->gender ) /* Zig-Zig */ - Rotate( parent ); - else - { - if( ubi_trEQUAL != parent->gender ) /* Zig-Zag */ - Rotate( SplayWithMe ); - } - Rotate( SplayWithMe ); /* Zig */ - } /* while */ - return( SplayWithMe ); - } /* Splay */ - -/* ========================================================================== ** - * Exported utilities. - */ - -ubi_trBool ubi_sptInsert( ubi_btRootPtr RootPtr, - ubi_btNodePtr NewNode, - ubi_btItemPtr ItemPtr, - ubi_btNodePtr *OldNode ) - /* ------------------------------------------------------------------------ ** - * This function uses a non-recursive algorithm to add a new element to the - * splay tree. - * - * Input: RootPtr - a pointer to the ubi_btRoot structure that indicates - * the root of the tree to which NewNode is to be added. - * NewNode - a pointer to an ubi_btNode structure that is NOT - * part of any tree. - * ItemPtr - A pointer to the sort key that is stored within - * *NewNode. ItemPtr MUST point to information stored - * in *NewNode or an EXACT DUPLICATE. The key data - * indicated by ItemPtr is used to place the new node - * into the tree. - * OldNode - a pointer to an ubi_btNodePtr. When searching - * the tree, a duplicate node may be found. If - * duplicates are allowed, then the new node will - * be simply placed into the tree. If duplicates - * are not allowed, however, then one of two things - * may happen. - * 1) if overwritting *is not* allowed, this - * function will return FALSE (indicating that - * the new node could not be inserted), and - * *OldNode will point to the duplicate that is - * still in the tree. - * 2) if overwritting *is* allowed, then this - * function will swap **OldNode for *NewNode. - * In this case, *OldNode will point to the node - * that was removed (thus allowing you to free - * the node). - * ** If you are using overwrite mode, ALWAYS ** - * ** check the return value of this parameter! ** - * Note: You may pass NULL in this parameter, the - * function knows how to cope. If you do this, - * however, there will be no way to return a - * pointer to an old (ie. replaced) node (which is - * a problem if you are using overwrite mode). - * - * Output: a boolean value indicating success or failure. The function - * will return FALSE if the node could not be added to the tree. - * Such failure will only occur if duplicates are not allowed, - * nodes cannot be overwritten, AND a duplicate key was found - * within the tree. - * ------------------------------------------------------------------------ ** - */ - { - ubi_btNodePtr OtherP; - - if( !(OldNode) ) - OldNode = &OtherP; - - if( ubi_btInsert( RootPtr, NewNode, ItemPtr, OldNode ) ) - { - RootPtr->root = Splay( NewNode ); - return( ubi_trTRUE ); - } - - /* Splay the unreplacable, duplicate keyed, unique, old node. */ - RootPtr->root = Splay( (*OldNode) ); - return( ubi_trFALSE ); - } /* ubi_sptInsert */ - -ubi_btNodePtr ubi_sptRemove( ubi_btRootPtr RootPtr, ubi_btNodePtr DeadNode ) - /* ------------------------------------------------------------------------ ** - * This function removes the indicated node from the tree. - * - * Input: RootPtr - A pointer to the header of the tree that contains - * the node to be removed. - * DeadNode - A pointer to the node that will be removed. - * - * Output: This function returns a pointer to the node that was removed - * from the tree (ie. the same as DeadNode). - * - * Note: The node MUST be in the tree indicated by RootPtr. If not, - * strange and evil things will happen to your trees. - * ------------------------------------------------------------------------ ** - */ - { - ubi_btNodePtr p; - - (void)Splay( DeadNode ); /* Move dead node to root. */ - if( NULL != (p = DeadNode->Link[ubi_trLEFT]) ) - { /* If left subtree exists... */ - ubi_btNodePtr q = DeadNode->Link[ubi_trRIGHT]; - - p->Link[ubi_trPARENT] = NULL; /* Left subtree node becomes root.*/ - p->gender = ubi_trPARENT; - p = ubi_btLast( p ); /* Find rightmost left node... */ - p->Link[ubi_trRIGHT] = q; /* ...attach right tree. */ - if( q ) - q->Link[ubi_trPARENT] = p; - RootPtr->root = Splay( p ); /* Resplay at p. */ - } - else - { - if( NULL != (p = DeadNode->Link[ubi_trRIGHT]) ) - { /* No left, but right subtree exists... */ - p->Link[ubi_trPARENT] = NULL; /* Right subtree root becomes... */ - p->gender = ubi_trPARENT; /* ...overall tree root. */ - RootPtr->root = p; - } - else - RootPtr->root = NULL; /* No subtrees => empty tree. */ - } - - (RootPtr->count)--; /* Decrement node count. */ - return( DeadNode ); /* Return pointer to pruned node. */ - } /* ubi_sptRemove */ - -ubi_btNodePtr ubi_sptLocate( ubi_btRootPtr RootPtr, - ubi_btItemPtr FindMe, - ubi_trCompOps CompOp ) - /* ------------------------------------------------------------------------ ** - * The purpose of ubi_btLocate() is to find a node or set of nodes given - * a target value and a "comparison operator". The Locate() function is - * more flexible and (in the case of trees that may contain dupicate keys) - * more precise than the ubi_btFind() function. The latter is faster, - * but it only searches for exact matches and, if the tree contains - * duplicates, Find() may return a pointer to any one of the duplicate- - * keyed records. - * - * Input: - * RootPtr - A pointer to the header of the tree to be searched. - * FindMe - An ubi_btItemPtr that indicates the key for which to - * search. - * CompOp - One of the following: - * CompOp Return a pointer to the node with - * ------ --------------------------------- - * ubi_trLT - the last key value that is less - * than FindMe. - * ubi_trLE - the first key matching FindMe, or - * the last key that is less than - * FindMe. - * ubi_trEQ - the first key matching FindMe. - * ubi_trGE - the first key matching FindMe, or the - * first key greater than FindMe. - * ubi_trGT - the first key greater than FindMe. - * Output: - * A pointer to the node matching the criteria listed above under - * CompOp, or NULL if no node matched the criteria. - * - * Notes: - * In the case of trees with duplicate keys, Locate() will behave as - * follows: - * - * Find: 3 Find: 3 - * Keys: 1 2 2 2 3 3 3 3 3 4 4 Keys: 1 1 2 2 2 4 4 5 5 5 6 - * ^ ^ ^ ^ ^ - * LT EQ GT LE GE - * - * That is, when returning a pointer to a node with a key that is LESS - * THAN the target key (FindMe), Locate() will return a pointer to the - * LAST matching node. - * When returning a pointer to a node with a key that is GREATER - * THAN the target key (FindMe), Locate() will return a pointer to the - * FIRST matching node. - * - * See Also: ubi_btFind(), ubi_btFirstOf(), ubi_btLastOf(). - * ------------------------------------------------------------------------ ** - */ - { - ubi_btNodePtr p; - - p = ubi_btLocate( RootPtr, FindMe, CompOp ); - if( p ) - RootPtr->root = Splay( p ); - return( p ); - } /* ubi_sptLocate */ - -ubi_btNodePtr ubi_sptFind( ubi_btRootPtr RootPtr, - ubi_btItemPtr FindMe ) - /* ------------------------------------------------------------------------ ** - * This function performs a non-recursive search of a tree for any node - * matching a specific key. - * - * Input: - * RootPtr - a pointer to the header of the tree to be searched. - * FindMe - a pointer to the key value for which to search. - * - * Output: - * A pointer to a node with a key that matches the key indicated by - * FindMe, or NULL if no such node was found. - * - * Note: In a tree that allows duplicates, the pointer returned *might - * not* point to the (sequentially) first occurance of the - * desired key. In such a tree, it may be more useful to use - * ubi_sptLocate(). - * ------------------------------------------------------------------------ ** - */ - { - ubi_btNodePtr p; - - p = ubi_btFind( RootPtr, FindMe ); - if( p ) - RootPtr->root = Splay( p ); - return( p ); - } /* ubi_sptFind */ - -void ubi_sptSplay( ubi_btRootPtr RootPtr, - ubi_btNodePtr SplayMe ) - /* ------------------------------------------------------------------------ ** - * This function allows you to splay the tree at a given node, thus moving - * the node to the top of the tree. - * - * Input: - * RootPtr - a pointer to the header of the tree to be splayed. - * SplayMe - a pointer to a node within the tree. This will become - * the new root node. - * Output: None. - * - * Notes: This is an uncharacteristic function for this group of modules - * in that it provides access to the internal balancing routines, - * which would normally be hidden. - * Splaying the tree will not damage it (assuming that I've done - * *my* job), but there is overhead involved. I don't recommend - * that you use this function unless you understand the underlying - * Splay Tree principles involved. - * ------------------------------------------------------------------------ ** - */ - { - RootPtr->root = Splay( SplayMe ); - } /* ubi_sptSplay */ - -int ubi_sptModuleID( int size, char *list[] ) - /* ------------------------------------------------------------------------ ** - * Returns a set of strings that identify the module. - * - * Input: size - The number of elements in the array <list>. - * list - An array of pointers of type (char *). This array - * should, initially, be empty. This function will fill - * in the array with pointers to strings. - * Output: The number of elements of <list> that were used. If this value - * is less than <size>, the values of the remaining elements are - * not guaranteed. - * - * Notes: Please keep in mind that the pointers returned indicate strings - * stored in static memory. Don't free() them, don't write over - * them, etc. Just read them. - * ------------------------------------------------------------------------ ** - */ - { - if( size > 0 ) - { - list[0] = ModuleID; - if( size > 1 ) - return( 1 + ubi_btModuleID( --size, &(list[1]) ) ); - return( 1 ); - } - return( 0 ); - } /* ubi_sptModuleID */ - -/* ================================ The End ================================= */ - diff --git a/source3/ubiqx/ubi_SplayTree.h b/source3/ubiqx/ubi_SplayTree.h deleted file mode 100644 index e4fac796a9..0000000000 --- a/source3/ubiqx/ubi_SplayTree.h +++ /dev/null @@ -1,377 +0,0 @@ -#ifndef UBI_SPLAYTREE_H -#define UBI_SPLAYTREE_H -/* ========================================================================== ** - * ubi_SplayTree.h - * - * Copyright (C) 1993-1998 by Christopher R. Hertel - * - * Email: crh@ubiqx.mn.org - * -------------------------------------------------------------------------- ** - * - * This module implements "splay" trees. Splay trees are binary trees - * that are rearranged (splayed) whenever a node is accessed. The - * splaying process *tends* to make the tree bushier (improves balance), - * and the nodes that are accessed most frequently *tend* to be closer to - * the top. - * - * References: "Self-Adjusting Binary Search Trees", by Daniel Sleator and - * Robert Tarjan. Journal of the Association for Computing - * Machinery Vol 32, No. 3, July 1985 pp. 652-686 - * - * See also: http://www.cs.cmu.edu/~sleator/ - * - * -------------------------------------------------------------------------- ** - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Library General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Library General Public License for more details. - * - * You should have received a copy of the GNU Library General Public - * License along with this library; if not, write to the Free - * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - * - * -------------------------------------------------------------------------- ** - * - * Log: ubi_SplayTree.h,v - * Revision 4.5 2000/01/08 23:26:49 crh - * Added ubi_trSplay() macro, which does a type cast for us. - * - * Revision 4.4 1998/06/04 21:29:27 crh - * Upper-cased defined constants (eg UBI_BINTREE_H) in some header files. - * This is more "standard", and is what people expect. Weird, eh? - * - * Revision 4.3 1998/06/03 17:45:05 crh - * Further fiddling with sys_include.h. It's now in ubi_BinTree.h which is - * included by all of the binary tree files. - * - * Also fixed some warnings produced by lint on Irix 6.2, which doesn't seem - * to like syntax like this: - * - * if( (a = b) ) - * - * The fix was to change lines like the above to: - * - * if( 0 != (a=b) ) - * - * Which means the same thing. - * - * Reminder: Some of the ubi_tr* macros in ubi_BinTree.h are redefined in - * ubi_AVLtree.h and ubi_SplayTree.h. This allows easy swapping - * of tree types by simply changing a header. Unfortunately, the - * macro redefinitions in ubi_AVLtree.h and ubi_SplayTree.h will - * conflict if used together. You must either choose a single tree - * type, or use the underlying function calls directly. Compare - * the two header files for more information. - * - * Revision 4.2 1998/06/02 01:29:14 crh - * Changed ubi_null.h to sys_include.h to make it more generic. - * - * Revision 4.1 1998/05/20 04:37:54 crh - * The C file now includes ubi_null.h. See ubi_null.h for more info. - * - * Revision 4.0 1998/03/10 03:40:57 crh - * Minor comment changes. The revision number is now 4.0 to match the - * BinTree and AVLtree modules. - * - * Revision 2.7 1998/01/24 06:37:57 crh - * Added a URL for more information. - * - * Revision 2.6 1997/12/23 04:02:20 crh - * In this version, all constants & macros defined in the header file have - * the ubi_tr prefix. Also cleaned up anything that gcc complained about - * when run with '-pedantic -fsyntax-only -Wall'. - * - * Revision 2.5 1997/07/26 04:15:46 crh - * + Cleaned up a few minor syntax annoyances that gcc discovered for me. - * + Changed ubi_TRUE and ubi_FALSE to ubi_trTRUE and ubi_trFALSE. - * - * Revision 2.4 1997/06/03 05:22:56 crh - * Changed TRUE and FALSE to ubi_TRUE and ubi_FALSE to avoid causing - * problems. - * - * Revision 2.3 1995/10/03 22:19:37 CRH - * Ubisized! - * Also, added the function ubi_sptSplay(). - * - * Revision 2.1 95/03/09 23:55:04 CRH - * Added the ModuleID static string and function. These modules are now - * self-identifying. - * - * Revision 2.0 95/02/27 22:34:55 CRH - * This module was updated to match the interface changes made to the - * ubi_BinTree module. In particular, the interface to the Locate() function - * has changed. See ubi_BinTree for more information on changes and new - * functions. - * - * The revision number was also upped to match ubi_BinTree. - * - * - * Revision 1.0 93/10/15 22:59:36 CRH - * With this revision, I have added a set of #define's that provide a single, - * standard API to all existing tree modules. Until now, each of the three - * existing modules had a different function and typedef prefix, as follows: - * - * Module Prefix - * ubi_BinTree ubi_bt - * ubi_AVLtree ubi_avl - * ubi_SplayTree ubi_spt - * - * To further complicate matters, only those portions of the base module - * (ubi_BinTree) that were superceeded in the new module had the new names. - * For example, if you were using ubi_SplayTree, the locate function was - * called "ubi_sptLocate", but the next and previous functions remained - * "ubi_btNext" and "ubi_btPrev". - * - * This was not too terrible if you were familiar with the modules and knew - * exactly which tree model you wanted to use. If you wanted to be able to - * change modules (for speed comparisons, etc), things could get messy very - * quickly. - * - * So, I have added a set of defined names that get redefined in any of the - * descendant modules. To use this standardized interface in your code, - * simply replace all occurances of "ubi_bt", "ubi_avl", and "ubi_spt" with - * "ubi_tr". The "ubi_tr" names will resolve to the correct function or - * datatype names for the module that you are using. Just remember to - * include the header for that module in your program file. Because these - * names are handled by the preprocessor, there is no added run-time - * overhead. - * - * Note that the original names do still exist, and can be used if you wish - * to write code directly to a specific module. This should probably only be - * done if you are planning to implement a new descendant type, such as - * red/black trees. CRH - * - * Revision 0.0 93/04/21 23:07:13 CRH - * Initial version, written by Christopher R. Hertel. - * This module implements Splay Trees using the ubi_BinTree module as a basis. - * - * ========================================================================== ** - */ - -#include "ubi_BinTree.h" /* Base binary tree functions, types, etc. */ - -/* ========================================================================== ** - * Function prototypes... - */ - -ubi_trBool ubi_sptInsert( ubi_btRootPtr RootPtr, - ubi_btNodePtr NewNode, - ubi_btItemPtr ItemPtr, - ubi_btNodePtr *OldNode ); - /* ------------------------------------------------------------------------ ** - * This function uses a non-recursive algorithm to add a new element to the - * splay tree. - * - * Input: RootPtr - a pointer to the ubi_btRoot structure that indicates - * the root of the tree to which NewNode is to be added. - * NewNode - a pointer to an ubi_btNode structure that is NOT - * part of any tree. - * ItemPtr - A pointer to the sort key that is stored within - * *NewNode. ItemPtr MUST point to information stored - * in *NewNode or an EXACT DUPLICATE. The key data - * indicated by ItemPtr is used to place the new node - * into the tree. - * OldNode - a pointer to an ubi_btNodePtr. When searching - * the tree, a duplicate node may be found. If - * duplicates are allowed, then the new node will - * be simply placed into the tree. If duplicates - * are not allowed, however, then one of two things - * may happen. - * 1) if overwritting *is not* allowed, this - * function will return FALSE (indicating that - * the new node could not be inserted), and - * *OldNode will point to the duplicate that is - * still in the tree. - * 2) if overwritting *is* allowed, then this - * function will swap **OldNode for *NewNode. - * In this case, *OldNode will point to the node - * that was removed (thus allowing you to free - * the node). - * ** If you are using overwrite mode, ALWAYS ** - * ** check the return value of this parameter! ** - * Note: You may pass NULL in this parameter, the - * function knows how to cope. If you do this, - * however, there will be no way to return a - * pointer to an old (ie. replaced) node (which is - * a problem if you are using overwrite mode). - * - * Output: a boolean value indicating success or failure. The function - * will return FALSE if the node could not be added to the tree. - * Such failure will only occur if duplicates are not allowed, - * nodes cannot be overwritten, AND a duplicate key was found - * within the tree. - * ------------------------------------------------------------------------ ** - */ - -ubi_btNodePtr ubi_sptRemove( ubi_btRootPtr RootPtr, ubi_btNodePtr DeadNode ); - /* ------------------------------------------------------------------------ ** - * This function removes the indicated node from the tree. - * - * Input: RootPtr - A pointer to the header of the tree that contains - * the node to be removed. - * DeadNode - A pointer to the node that will be removed. - * - * Output: This function returns a pointer to the node that was removed - * from the tree (ie. the same as DeadNode). - * - * Note: The node MUST be in the tree indicated by RootPtr. If not, - * strange and evil things will happen to your trees. - * ------------------------------------------------------------------------ ** - */ - -ubi_btNodePtr ubi_sptLocate( ubi_btRootPtr RootPtr, - ubi_btItemPtr FindMe, - ubi_trCompOps CompOp ); - /* ------------------------------------------------------------------------ ** - * The purpose of ubi_btLocate() is to find a node or set of nodes given - * a target value and a "comparison operator". The Locate() function is - * more flexible and (in the case of trees that may contain dupicate keys) - * more precise than the ubi_btFind() function. The latter is faster, - * but it only searches for exact matches and, if the tree contains - * duplicates, Find() may return a pointer to any one of the duplicate- - * keyed records. - * - * Input: - * RootPtr - A pointer to the header of the tree to be searched. - * FindMe - An ubi_btItemPtr that indicates the key for which to - * search. - * CompOp - One of the following: - * CompOp Return a pointer to the node with - * ------ --------------------------------- - * ubi_trLT - the last key value that is less - * than FindMe. - * ubi_trLE - the first key matching FindMe, or - * the last key that is less than - * FindMe. - * ubi_trEQ - the first key matching FindMe. - * ubi_trGE - the first key matching FindMe, or the - * first key greater than FindMe. - * ubi_trGT - the first key greater than FindMe. - * Output: - * A pointer to the node matching the criteria listed above under - * CompOp, or NULL if no node matched the criteria. - * - * Notes: - * In the case of trees with duplicate keys, Locate() will behave as - * follows: - * - * Find: 3 Find: 3 - * Keys: 1 2 2 2 3 3 3 3 3 4 4 Keys: 1 1 2 2 2 4 4 5 5 5 6 - * ^ ^ ^ ^ ^ - * LT EQ GT LE GE - * - * That is, when returning a pointer to a node with a key that is LESS - * THAN the target key (FindMe), Locate() will return a pointer to the - * LAST matching node. - * When returning a pointer to a node with a key that is GREATER - * THAN the target key (FindMe), Locate() will return a pointer to the - * FIRST matching node. - * - * See Also: ubi_btFind(), ubi_btFirstOf(), ubi_btLastOf(). - * ------------------------------------------------------------------------ ** - */ - -ubi_btNodePtr ubi_sptFind( ubi_btRootPtr RootPtr, - ubi_btItemPtr FindMe ); - /* ------------------------------------------------------------------------ ** - * This function performs a non-recursive search of a tree for any node - * matching a specific key. - * - * Input: - * RootPtr - a pointer to the header of the tree to be searched. - * FindMe - a pointer to the key value for which to search. - * - * Output: - * A pointer to a node with a key that matches the key indicated by - * FindMe, or NULL if no such node was found. - * - * Note: In a tree that allows duplicates, the pointer returned *might - * not* point to the (sequentially) first occurance of the - * desired key. In such a tree, it may be more useful to use - * ubi_sptLocate(). - * ------------------------------------------------------------------------ ** - */ - -void ubi_sptSplay( ubi_btRootPtr RootPtr, - ubi_btNodePtr SplayMe ); - /* ------------------------------------------------------------------------ ** - * This function allows you to splay the tree at a given node, thus moving - * the node to the top of the tree. - * - * Input: - * RootPtr - a pointer to the header of the tree to be splayed. - * SplayMe - a pointer to a node within the tree. This will become - * the new root node. - * Output: None. - * - * Notes: This is an uncharacteristic function for this group of modules - * in that it provides access to the internal balancing routines, - * which would normally be hidden. - * Splaying the tree will not damage it (assuming that I've done - * *my* job), but there is overhead involved. I don't recommend - * that you use this function unless you understand the underlying - * Splay Tree principles involved. - * ------------------------------------------------------------------------ ** - */ - -int ubi_sptModuleID( int size, char *list[] ); - /* ------------------------------------------------------------------------ ** - * Returns a set of strings that identify the module. - * - * Input: size - The number of elements in the array <list>. - * list - An array of pointers of type (char *). This array - * should, initially, be empty. This function will fill - * in the array with pointers to strings. - * Output: The number of elements of <list> that were used. If this value - * is less than <size>, the values of the remaining elements are - * not guaranteed. - * - * Notes: Please keep in mind that the pointers returned indicate strings - * stored in static memory. Don't free() them, don't write over - * them, etc. Just read them. - * ------------------------------------------------------------------------ ** - */ - -/* -------------------------------------------------------------------------- ** - * Masquarade... - * - * This set of defines allows you to write programs that will use any of the - * implemented binary tree modules (currently BinTree, AVLtree, and SplayTree). - * Instead of using ubi_bt..., use ubi_tr..., and select the tree type by - * including the appropriate module header. - */ - -#undef ubi_trInsert -#undef ubi_trRemove -#undef ubi_trLocate -#undef ubi_trFind -#undef ubi_trModuleID - -#define ubi_trInsert( Rp, Nn, Ip, On ) \ - ubi_sptInsert( (ubi_btRootPtr)(Rp), (ubi_btNodePtr)(Nn), \ - (ubi_btItemPtr)(Ip), (ubi_btNodePtr *)(On) ) - -#define ubi_trRemove( Rp, Dn ) \ - ubi_sptRemove( (ubi_btRootPtr)(Rp), (ubi_btNodePtr)(Dn) ) - -#define ubi_trLocate( Rp, Ip, Op ) \ - ubi_sptLocate( (ubi_btRootPtr)(Rp), \ - (ubi_btItemPtr)(Ip), \ - (ubi_trCompOps)(Op) ) - -#define ubi_trFind( Rp, Ip ) \ - ubi_sptFind( (ubi_btRootPtr)(Rp), (ubi_btItemPtr)(Ip) ) - -#define ubi_trSplay( Rp, Sm ) \ - ubi_sptSplay( (ubi_btRootPtr)(Rp), (ubi_btNodePtr)(Sm) ) - -#define ubi_trModuleID( s, l ) ubi_sptModuleID( s, l ) - -/* ================================ The End ================================= */ -#endif /* UBI_SPLAYTREE_H */ diff --git a/source3/ubiqx/ubi_dLinkList.c b/source3/ubiqx/ubi_dLinkList.c deleted file mode 100644 index eb95033c69..0000000000 --- a/source3/ubiqx/ubi_dLinkList.c +++ /dev/null @@ -1,171 +0,0 @@ -/* ========================================================================== ** - * ubi_dLinkList.c - * - * Copyright (C) 1997, 1998 by Christopher R. Hertel - * - * Email: crh@ubiqx.mn.org - * -------------------------------------------------------------------------- ** - * This module implements simple doubly-linked lists. - * -------------------------------------------------------------------------- ** - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Library General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Library General Public License for more details. - * - * You should have received a copy of the GNU Library General Public - * License along with this library; if not, write to the Free - * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - * - * -------------------------------------------------------------------------- ** - * - * Log: ubi_dLinkList.c,v - * Revision 0.11 1999/06/19 16:58:06 crh - * Renamed the ubi_slRemove() function in ubi_sLinkList to - * ubi_slRemoveNext(). I was bothered by the fact that it didn't - * match the functionality of the ubi_dlRemove() function in - * ubi_dLinkList. The new name is more 'correct'. - * - * Revision 0.10 1998/07/24 07:30:20 crh - * Added the ubi_dlNewList() macro. - * - * Revision 0.9 1998/06/04 21:29:27 crh - * Upper-cased defined constants (eg UBI_BINTREE_H) in some header files. - * This is more "standard", and is what people expect. Weird, eh? - * - * Revision 0.8 1998/06/03 18:06:03 crh - * Further fiddling with sys_include.h, which has been moved from the .c file - * to the .h file. - * - * Revision 0.7 1998/06/02 01:38:47 crh - * Changed include file name from ubi_null.h to sys_include.h to make it - * more generic. - * - * Revision 0.6 1998/05/20 04:38:05 crh - * The C file now includes ubi_null.h. See ubi_null.h for more info. - * - * Revision 0.5 1998/03/10 02:55:00 crh - * Simplified the code and added macros for stack & queue manipulations. - * - * Revision 0.4 1998/01/03 01:53:56 crh - * Added ubi_dlCount() macro. - * - * Revision 0.3 1997/10/15 03:05:39 crh - * Added some handy type casting to the macros. Added AddHere and RemThis - * macros. - * - * Revision 0.2 1997/10/08 03:07:21 crh - * Fixed a few forgotten link-ups in Insert(), and fixed the AddHead() - * macro, which was passing the wrong value for <After> to Insert(). - * - * Revision 0.1 1997/10/07 04:34:07 crh - * Initial Revision. - * - * -------------------------------------------------------------------------- ** - * This module is similar to the ubi_sLinkList module, but it is neither a - * descendant type nor an easy drop-in replacement for the latter. One key - * difference is that the ubi_dlRemove() function removes the indicated node, - * while the ubi_slRemoveNext() function (in ubi_sLinkList) removes the node - * *following* the indicated node. - * - * ========================================================================== ** - */ - -#include "ubi_dLinkList.h" /* Header for *this* module. */ - -/* ========================================================================== ** - * Functions... - */ - -ubi_dlListPtr ubi_dlInitList( ubi_dlListPtr ListPtr ) - /* ------------------------------------------------------------------------ ** - * Initialize a doubly-linked list header. - * - * Input: ListPtr - A pointer to the list structure that is to be - * initialized for use. - * - * Output: A pointer to the initialized list header (i.e., same as - * <ListPtr>). - * - * ------------------------------------------------------------------------ ** - */ - { - ListPtr->Head = NULL; - ListPtr->Tail = NULL; - ListPtr->count = 0; - return( ListPtr ); - } /* ubi_dlInitList */ - -ubi_dlNodePtr ubi_dlInsert( ubi_dlListPtr ListPtr, - ubi_dlNodePtr New, - ubi_dlNodePtr After ) - /* ------------------------------------------------------------------------ ** - * Insert a new node into the list. - * - * Input: ListPtr - A pointer to the list into which the node is to - * be inserted. - * New - Pointer to the new node. - * After - NULL, or a pointer to a node that is already in the - * list. - * If NULL, then <New> will be added at the head of the - * list, else it will be added following <After>. - * - * Output: A pointer to the node that was inserted into the list (i.e., - * the same as <New>). - * - * ------------------------------------------------------------------------ ** - */ - { - ubi_dlNodePtr PredNode = After ? After : (ubi_dlNodePtr)ListPtr; - - New->Next = PredNode->Next; - New->Prev = After; - PredNode->Next = New; - if( New->Next ) - New->Next->Prev = New; - else - ListPtr->Tail = New; - - (ListPtr->count)++; - - return( New ); - } /* ubi_dlInsert */ - -ubi_dlNodePtr ubi_dlRemove( ubi_dlListPtr ListPtr, ubi_dlNodePtr Old ) - /* ------------------------------------------------------------------------ ** - * Remove a node from the list. - * - * Input: ListPtr - A pointer to the list from which <Old> is to be - * removed. - * Old - A pointer to the node that is to be removed from the - * list. - * - * Output: A pointer to the node that was removed (i.e., <Old>). - * - * ------------------------------------------------------------------------ ** - */ - { - if( Old ) - { - if( Old->Next ) - Old->Next->Prev = Old->Prev; - else - ListPtr->Tail = Old->Prev; - - if( Old->Prev ) - Old->Prev->Next = Old->Next; - else - ListPtr->Head = Old->Next; - - (ListPtr->count)--; - } - - return( Old ); - } /* ubi_dlRemove */ - -/* ================================ The End ================================= */ diff --git a/source3/ubiqx/ubi_dLinkList.h b/source3/ubiqx/ubi_dLinkList.h deleted file mode 100644 index 682e566ee6..0000000000 --- a/source3/ubiqx/ubi_dLinkList.h +++ /dev/null @@ -1,242 +0,0 @@ -#ifndef UBI_DLINKLIST_H -#define UBI_DLINKLIST_H -/* ========================================================================== ** - * ubi_dLinkList.h - * - * Copyright (C) 1997, 1998 by Christopher R. Hertel - * - * Email: crh@ubiqx.mn.org - * -------------------------------------------------------------------------- ** - * This module implements simple doubly-linked lists. - * -------------------------------------------------------------------------- ** - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Library General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Library General Public License for more details. - * - * You should have received a copy of the GNU Library General Public - * License along with this library; if not, write to the Free - * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - * - * -------------------------------------------------------------------------- ** - * - * Log: ubi_dLinkList.h,v - * Revision 0.11 1999/06/19 16:58:06 crh - * Renamed the ubi_slRemove() function in ubi_sLinkList to - * ubi_slRemoveNext(). I was bothered by the fact that it didn't - * match the functionality of the ubi_dlRemove() function in - * ubi_dLinkList. The new name is more 'correct'. - * - * Revision 0.10 1998/07/24 07:30:20 crh - * Added the ubi_dlNewList() macro. - * - * Revision 0.9 1998/06/04 21:29:27 crh - * Upper-cased defined constants (eg UBI_BINTREE_H) in some header files. - * This is more "standard", and is what people expect. Weird, eh? - * - * Revision 0.8 1998/06/03 18:06:03 crh - * Further fiddling with sys_include.h, which has been moved from the .c file - * to the .h file. - * - * Revision 0.7 1998/06/02 01:38:47 crh - * Changed include file name from ubi_null.h to sys_include.h to make it - * more generic. - * - * Revision 0.6 1998/05/20 04:38:05 crh - * The C file now includes ubi_null.h. See ubi_null.h for more info. - * - * Revision 0.5 1998/03/10 02:54:04 crh - * Simplified the code and added macros for stack & queue manipulations. - * - * Revision 0.4 1998/01/03 01:53:44 crh - * Added ubi_dlCount() macro. - * - * Revision 0.3 1997/10/15 03:04:31 crh - * Added some handy type casting to the macros. Added AddHere and RemThis - * macros. - * - * Revision 0.2 1997/10/08 03:08:16 crh - * Fixed a few forgotten link-ups in Insert(), and fixed the AddHead() - * macro, which was passing the wrong value for <After> to Insert(). - * - * Revision 0.1 1997/10/07 04:34:38 crh - * Initial Revision. - * - * -------------------------------------------------------------------------- ** - * This module is similar to the ubi_sLinkList module, but it is neither a - * descendant type nor an easy drop-in replacement for the latter. One key - * difference is that the ubi_dlRemove() function removes the indicated node, - * while the ubi_slRemoveNext() function (in ubi_sLinkList) removes the node - * *following* the indicated node. - * - * ========================================================================== ** - */ - -#include "sys_include.h" /* System-specific includes. */ - -/* ========================================================================== ** - * Typedefs... - * - * ubi_dlNode - This is the basic node structure. - * ubi_dlNodePtr - Pointer to a node. - * ubi_dlList - This is the list header structure. - * ubi_dlListPtr - Pointer to a List (i.e., a list header structure). - * - */ - -typedef struct ubi_dlListNode - { - struct ubi_dlListNode *Next; - struct ubi_dlListNode *Prev; - } ubi_dlNode; - -typedef ubi_dlNode *ubi_dlNodePtr; - -typedef struct - { - ubi_dlNodePtr Head; - ubi_dlNodePtr Tail; - unsigned long count; - } ubi_dlList; - -typedef ubi_dlList *ubi_dlListPtr; - -/* ========================================================================== ** - * Macros... - * - * ubi_dlNewList - Macro used to declare and initialize a new list in one - * swell foop. It is used when defining a variable of - * type ubi_dlList. The definition - * static ubi_dlNewList( gerbil ); - * is translated to - * static ubi_dlList gerbil[1] = {{ NULL, NULL, 0 }}; - * - * ubi_dlCount - Return the number of entries currently in the list. - * - * ubi_dlAddHead - Add a new node at the head of the list. - * ubi_dlAddNext - Add a node following the given node. - * ubi_dlAddTail - Add a new node at the tail of the list. - * Note: AddTail evaluates the L parameter twice. - * - * ubi_dlRemHead - Remove the node at the head of the list, if any. - * Note: RemHead evaluates the L parameter twice. - * ubi_dlRemThis - Remove the indicated node. - * ubi_dlRemTail - Remove the node at the tail of the list, if any. - * Note: RemTail evaluates the L parameter twice. - * - * ubi_dlFirst - Return a pointer to the first node in the list, if any. - * ubi_dlLast - Return a pointer to the last node in the list, if any. - * ubi_dlNext - Given a node, return a pointer to the next node. - * ubi_dlPrev - Given a node, return a pointer to the previous node. - * - * ubi_dlPush - Add a node at the head of the list (synonym of AddHead). - * ubi_dlPop - Remove a node at the head of the list (synonym of RemHead). - * ubi_dlEnqueue - Add a node at the tail of the list (sysnonym of AddTail). - * ubi_dlDequeue - Remove a node at the head of the list (synonym of RemHead). - * - * Note that all of these provide type casting of the parameters. The - * Add and Rem macros are nothing more than nice front-ends to the - * Insert and Remove operations. - * - * Also note that the First, Next and Last macros do no parameter checking! - * - */ - -#define ubi_dlNewList( L ) ubi_dlList (L)[1] = {{ NULL, NULL, 0 }} - -#define ubi_dlCount( L ) (((ubi_dlListPtr)(L))->count) - -#define ubi_dlAddHead( L, N ) \ - ubi_dlInsert( (ubi_dlListPtr)(L), (ubi_dlNodePtr)(N), NULL ) - -#define ubi_dlAddNext( L, N, A ) \ - ubi_dlInsert( (ubi_dlListPtr)(L), \ - (ubi_dlNodePtr)(N), \ - (ubi_dlNodePtr)(A) ) - -#define ubi_dlAddTail( L, N ) \ - ubi_dlInsert( (ubi_dlListPtr)(L), \ - (ubi_dlNodePtr)(N), \ - (((ubi_dlListPtr)(L))->Tail) ) - -#define ubi_dlRemHead( L ) ubi_dlRemove( (ubi_dlListPtr)(L), \ - (((ubi_dlListPtr)(L))->Head) ) - -#define ubi_dlRemThis( L, N ) ubi_dlRemove( (ubi_dlListPtr)(L), \ - (ubi_dlNodePtr)(N) ) - -#define ubi_dlRemTail( L ) ubi_dlRemove( (ubi_dlListPtr)(L), \ - (((ubi_dlListPtr)(L))->Tail) ) - -#define ubi_dlFirst( L ) (((ubi_dlListPtr)(L))->Head) - -#define ubi_dlLast( L ) (((ubi_dlListPtr)(L))->Tail) - -#define ubi_dlNext( N ) (((ubi_dlNodePtr)(N))->Next) - -#define ubi_dlPrev( N ) (((ubi_dlNodePtr)(N))->Prev) - -#define ubi_dlPush ubi_dlAddHead -#define ubi_dlPop ubi_dlRemHead -#define ubi_dlEnqueue ubi_dlAddTail -#define ubi_dlDequeue ubi_dlRemHead - -/* ========================================================================== ** - * Function prototypes... - */ - -ubi_dlListPtr ubi_dlInitList( ubi_dlListPtr ListPtr ); - /* ------------------------------------------------------------------------ ** - * Initialize a doubly-linked list header. - * - * Input: ListPtr - A pointer to the list structure that is to be - * initialized for use. - * - * Output: A pointer to the initialized list header (i.e., same as - * <ListPtr>). - * - * ------------------------------------------------------------------------ ** - */ - -ubi_dlNodePtr ubi_dlInsert( ubi_dlListPtr ListPtr, - ubi_dlNodePtr New, - ubi_dlNodePtr After ); - /* ------------------------------------------------------------------------ ** - * Insert a new node into the list. - * - * Input: ListPtr - A pointer to the list into which the node is to - * be inserted. - * New - Pointer to the new node. - * After - NULL, or a pointer to a node that is already in the - * list. - * If NULL, then <New> will be added at the head of the - * list, else it will be added following <After>. - * - * Output: A pointer to the node that was inserted into the list (i.e., - * the same as <New>). - * - * ------------------------------------------------------------------------ ** - */ - -ubi_dlNodePtr ubi_dlRemove( ubi_dlListPtr ListPtr, ubi_dlNodePtr Old ); - /* ------------------------------------------------------------------------ ** - * Remove a node from the list. - * - * Input: ListPtr - A pointer to the list from which <Old> is to be - * removed. - * Old - A pointer to the node that is to be removed from the - * list. - * - * Output: A pointer to the node that was removed (i.e., <Old>). - * - * ------------------------------------------------------------------------ ** - */ - -/* ================================ The End ================================= */ -#endif /* UBI_DLINKLIST_H */ diff --git a/source3/ubiqx/ubi_sLinkList.c b/source3/ubiqx/ubi_sLinkList.c deleted file mode 100644 index ff75931b47..0000000000 --- a/source3/ubiqx/ubi_sLinkList.c +++ /dev/null @@ -1,187 +0,0 @@ -/* ========================================================================== ** - * ubi_sLinkList.c - * - * Copyright (C) 1997, 1998 by Christopher R. Hertel - * - * Email: crh@ubiqx.mn.org - * -------------------------------------------------------------------------- ** - * This module implements a simple singly-linked list. - * -------------------------------------------------------------------------- ** - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Library General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Library General Public License for more details. - * - * You should have received a copy of the GNU Library General Public - * License along with this library; if not, write to the Free - * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - * - * -------------------------------------------------------------------------- ** - * - * Log: ubi_sLinkList.c,v - * Revision 0.10 1999/06/19 16:58:06 crh - * Renamed the ubi_slRemove() function in ubi_sLinkList to - * ubi_slRemoveNext(). I was bothered by the fact that it didn't - * match the functionality of the ubi_dlRemove() function in - * ubi_dLinkList. The new name is more 'correct'. - * - * Revision 0.9 1998/07/24 07:30:20 crh - * Added the ubi_slNewList() macro. - * - * Revision 0.8 1998/06/04 21:29:27 crh - * Upper-cased defined constants (eg UBI_BINTREE_H) in some header files. - * This is more "standard", and is what people expect. Weird, eh? - * - * Revision 0.7 1998/06/03 18:06:03 crh - * Further fiddling with sys_include.h, which has been moved from the .c file - * to the .h file. - * - * Revision 0.6 1998/06/02 01:38:47 crh - * Changed include file name from ubi_null.h to sys_include.h to make it - * more generic. - * - * Revision 0.5 1998/05/20 04:38:05 crh - * The C file now includes ubi_null.h. See ubi_null.h for more info. - * - * Revision 0.4 1998/03/10 02:23:20 crh - * Combined ubi_StackQueue and ubi_sLinkList into one module. Redesigned - * the functions and macros. Not a complete rewrite but close to it. - * - * Revision 0.3 1998/01/03 01:59:52 crh - * Added ubi_slCount() macro. - * - * Revision 0.2 1997/10/21 03:35:18 crh - * Added parameter <After> in function Insert(). Made necessary changes - * to macro AddHead() and added macro AddHere(). - * - * Revision 0.1 1997/10/16 02:53:45 crh - * Initial Revision. - * - * -------------------------------------------------------------------------- ** - * This module implements a singly-linked list which may also be used as a - * queue or a stack. For a queue, entries are added at the tail and removed - * from the head of the list. For a stack, the entries are entered and - * removed from the head of the list. A traversal of the list will always - * start at the head of the list and proceed toward the tail. This is all - * mind-numbingly simple, but I'm surprised by the number of programs out - * there which re-implement this a dozen or so times. - * - * Note: When the list header is initialized, the Tail pointer is set to - * point to the Head pointer. This simplifies things a great deal, - * except that you can't initialize a stack or queue by simply - * zeroing it out. One sure way to initialize the header is to call - * ubi_slInit(). Another option would be something like this: - * - * ubi_slNewList( MyList ); - * - * Which translates to: - * - * ubi_slList MyList[1] = { NULL, (ubi_slNodePtr)MyList, 0 }; - * - * See ubi_slInit(), ubi_slNewList(), and the ubi_slList structure - * for more info. - * - * + Also, note that this module is similar to the ubi_dLinkList - * module. There are three key differences: - * - This is a singly-linked list, the other is a doubly-linked - * list. - * - In this module, if the list is empty, the tail pointer will - * point back to the head of the list as described above. This - * is not done in ubi_dLinkList. - * - The ubi_slRemoveNext() function, by necessity, removes the - * 'next' node. In ubi_dLinkList, the ubi_dlRemove() function - * removes the 'current' node. - * - * ========================================================================== ** - */ - -#include "ubi_sLinkList.h" /* Header for *this* module. */ - -/* ========================================================================== ** - * Functions... - */ - -ubi_slListPtr ubi_slInitList( ubi_slListPtr ListPtr ) - /* ------------------------------------------------------------------------ ** - * Initialize a singly-linked list header. - * - * Input: ListPtr - A pointer to the list structure that is to be - * initialized for use. - * - * Output: A pointer to the initialized list header (i.e., same as - * <ListPtr>). - * - * ------------------------------------------------------------------------ ** - */ - { - ListPtr->Head = NULL; - ListPtr->Tail = (ubi_slNodePtr)ListPtr; - ListPtr->count = 0; - return( ListPtr ); - } /* ubi_slInitList */ - -ubi_slNodePtr ubi_slInsert( ubi_slListPtr ListPtr, - ubi_slNodePtr New, - ubi_slNodePtr After ) - /* ------------------------------------------------------------------------ ** - * Add a node to the list. - * - * Input: ListPtr - A pointer to the list into which the node is to - * be inserted. - * New - Pointer to the node that is to be added to the list. - * After - Pointer to a list in a node after which the new node - * will be inserted. If NULL, then the new node will - * be added at the head of the list. - * - * Output: A pointer to the node that was inserted into the list (i.e., - * the same as <New>). - * - * ------------------------------------------------------------------------ ** - */ - { - After = After ? After : (ubi_slNodePtr)ListPtr; - New->Next = After->Next; - After->Next = New; - if( !(New->Next) ) - ListPtr->Tail = New; - (ListPtr->count)++; - return( New ); - } /* ubi_slInsert */ - -ubi_slNodePtr ubi_slRemoveNext( ubi_slListPtr ListPtr, ubi_slNodePtr AfterMe ) - /* ------------------------------------------------------------------------ ** - * Remove the node followng <AfterMe>. If <AfterMe> is NULL, remove from - * the head of the list. - * - * Input: ListPtr - A pointer to the list from which the node is to be - * removed. - * AfterMe - Pointer to the node preceeding the node to be - * removed. - * - * Output: A pointer to the node that was removed, or NULL if the list is - * empty. - * - * ------------------------------------------------------------------------ ** - */ - { - ubi_slNodePtr DelNode; - - AfterMe = AfterMe ? AfterMe : (ubi_slNodePtr)ListPtr; - DelNode = AfterMe->Next; - if( DelNode ) - { - if( !(DelNode->Next) ) - ListPtr->Tail = AfterMe; - AfterMe->Next = DelNode->Next; - (ListPtr->count)--; - } - return( DelNode ); - } /* ubi_slRemoveNext */ - -/* ================================ The End ================================= */ diff --git a/source3/ubiqx/ubi_sLinkList.h b/source3/ubiqx/ubi_sLinkList.h deleted file mode 100644 index 53bfa40067..0000000000 --- a/source3/ubiqx/ubi_sLinkList.h +++ /dev/null @@ -1,254 +0,0 @@ -#ifndef UBI_SLINKLIST_H -#define UBI_SLINKLIST_H -/* ========================================================================== ** - * ubi_sLinkList.h - * - * Copyright (C) 1997, 1998 by Christopher R. Hertel - * - * Email: crh@ubiqx.mn.org - * -------------------------------------------------------------------------- ** - * This module implements a simple singly-linked list. - * -------------------------------------------------------------------------- ** - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Library General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Library General Public License for more details. - * - * You should have received a copy of the GNU Library General Public - * License along with this library; if not, write to the Free - * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - * - * -------------------------------------------------------------------------- ** - * - * Log: ubi_sLinkList.h,v - * Revision 0.10 1999/06/19 16:58:06 crh - * Renamed the ubi_slRemove() function in ubi_sLinkList to - * ubi_slRemoveNext(). I was bothered by the fact that it didn't - * match the functionality of the ubi_dlRemove() function in - * ubi_dLinkList. The new name is more 'correct'. - * - * Revision 0.9 1998/07/24 07:30:20 crh - * Added the ubi_slNewList() macro. - * - * Revision 0.8 1998/06/04 21:29:27 crh - * Upper-cased defined constants (eg UBI_BINTREE_H) in some header files. - * This is more "standard", and is what people expect. Weird, eh? - * - * Revision 0.7 1998/06/03 18:06:03 crh - * Further fiddling with sys_include.h, which has been moved from the .c file - * to the .h file. - * - * Revision 0.6 1998/06/02 01:38:47 crh - * Changed include file name from ubi_null.h to sys_include.h to make it - * more generic. - * - * Revision 0.5 1998/05/20 04:38:05 crh - * The C file now includes ubi_null.h. See ubi_null.h for more info. - * - * Revision 0.4 1998/03/10 02:22:39 crh - * Combined ubi_StackQueue and ubi_sLinkList into one module. Redesigned - * the functions and macros. Not a complete rewrite but close to it. - * - * Revision 0.3 1998/01/03 02:00:02 crh - * Added ubi_slCount() macro. - * - * Revision 0.2 1997/10/21 03:36:14 crh - * Added parameter <After> in function Insert(). Made necessary changes - * to macro AddHead() and added macro AddHere(). - * - * Revision 0.1 1997/10/16 02:54:08 crh - * Initial Revision. - * - * -------------------------------------------------------------------------- ** - * This module implements a singly-linked list which may also be used as a - * queue or a stack. For a queue, entries are added at the tail and removed - * from the head of the list. For a stack, the entries are entered and - * removed from the head of the list. A traversal of the list will always - * start at the head of the list and proceed toward the tail. This is all - * mind-numbingly simple, but I'm surprised by the number of programs out - * there which re-implement this a dozen or so times. - * - * Note: When the list header is initialized, the Tail pointer is set to - * point to the Head pointer. This simplifies things a great deal, - * except that you can't initialize a stack or queue by simply - * zeroing it out. One sure way to initialize the header is to call - * ubi_slInit(). Another option would be something like this: - * - * ubi_slNewList( MyList ); - * - * Which translates to: - * - * ubi_slList MyList[1] = { NULL, (ubi_slNodePtr)MyList, 0 }; - * - * See ubi_slInit(), ubi_slNewList(), and the ubi_slList structure - * for more info. - * - * + Also, note that this module is similar to the ubi_dLinkList - * module. There are three key differences: - * - This is a singly-linked list, the other is a doubly-linked - * list. - * - In this module, if the list is empty, the tail pointer will - * point back to the head of the list as described above. This - * is not done in ubi_dLinkList. - * - The ubi_slRemoveNext() function, by necessity, removes the - * 'next' node. In ubi_dLinkList, the ubi_dlRemove() function - * removes the 'current' node. - * - * ========================================================================== ** - */ - -#include "sys_include.h" /* System-specific includes. */ - -/* ========================================================================== ** - * Typedefs... - * - * ubi_slNode - This is the basic node structure. - * ubi_slNodePtr - Pointer to a node. - * ubi_slList - This is the list header structure. - * ubi_slListPtr - Pointer to a List (i.e., a list header structure). - * - */ - -typedef struct ubi_slListNode - { - struct ubi_slListNode *Next; - } ubi_slNode; - -typedef ubi_slNode *ubi_slNodePtr; - -typedef struct - { - ubi_slNodePtr Head; - ubi_slNodePtr Tail; - unsigned long count; - } ubi_slList; - -typedef ubi_slList *ubi_slListPtr; - - -/* ========================================================================== ** - * Macros... - * - * ubi_slNewList - Macro used to declare and initialize a list header in - * one step. - * - * ubi_slCount - Returns the current number of entries in the list. - * - * ubi_slAddHead - Add a new node at the head of the list. - * ubi_slAddNext - Add a new node following the indicated node. - * ubi_slAddTail - Add a new node to the tail of the list. - * Note: AddTail evaluates the L parameter twice. - * - * ubi_slRemHead - Remove the node at the head of the list, if any. - * ubi_slRemNext - Remove the node following the given node. - * - * ubi_slFirst - Return a pointer to the first node in the list, if any. - * ubi_slNext - Given a node, return a pointer to the next node. - * ubi_slLast - Return a pointer to the last node in the list, if any. - * - * ubi_slPush - Add a node at the head of the list (synonym of AddHead). - * ubi_slPop - Remove a node at the head of the list (synonym of RemHead). - * ubi_slEnqueue - Add a node at the tail of the list (sysnonym of AddTail). - * ubi_slDequeue - Remove a node at the head of the list (synonym of RemHead). - * - * Note that all of these provide type casting of the parameters. The - * Add and Rem macros are nothing more than nice front-ends to the - * Insert and Remove functions. - * - * Also note that the First, Next and Last macros do no parameter checking! - * - */ - -#define ubi_slNewList( L ) ubi_slList (L)[1] = {{ NULL, (ubi_slNodePtr)(L), 0 }} - -#define ubi_slCount( L ) (((ubi_slListPtr)(L))->count) - -#define ubi_slAddHead( L, N ) \ - ubi_slInsert( (ubi_slListPtr)(L), (ubi_slNodePtr)(N), NULL ) - -#define ubi_slAddNext( L, N, A ) \ - ubi_slInsert( (ubi_slListPtr)(L), \ - (ubi_slNodePtr)(N), \ - (ubi_slNodePtr)(A) ) - -#define ubi_slAddTail( L, N ) \ - ubi_slInsert( (ubi_slListPtr)(L), \ - (ubi_slNodePtr)(N), \ - ((ubi_slListPtr)(L))->Tail ) - -#define ubi_slRemHead( L ) ubi_slRemoveNext( (ubi_slListPtr)(L), NULL ) - -#define ubi_slRemNext( L, N ) \ - ubi_slRemoveNext( (ubi_slListPtr)(L), (ubi_slNodePtr)(N) ) - -#define ubi_slFirst( L ) (((ubi_slListPtr)(L))->Head) - -#define ubi_slNext( N ) (((ubi_slNodePtr)(N))->Next) - -#define ubi_slLast( L ) (((ubi_slListPtr)(L))->Tail) - -#define ubi_slPush ubi_slAddHead -#define ubi_slPop ubi_slRemHead -#define ubi_slEnqueue ubi_slAddTail -#define ubi_slDequeue ubi_slRemHead - -/* ========================================================================== ** - * Function prototypes... - */ - -ubi_slListPtr ubi_slInitList( ubi_slListPtr ListPtr ); - /* ------------------------------------------------------------------------ ** - * Initialize a singly-linked list header. - * - * Input: ListPtr - A pointer to the list structure that is to be - * initialized for use. - * - * Output: A pointer to the initialized list header (i.e., same as - * <ListPtr>). - * - * ------------------------------------------------------------------------ ** - */ - -ubi_slNodePtr ubi_slInsert( ubi_slListPtr ListPtr, - ubi_slNodePtr New, - ubi_slNodePtr After ); - /* ------------------------------------------------------------------------ ** - * Add a node to the list. - * - * Input: ListPtr - A pointer to the list into which the node is to - * be inserted. - * New - Pointer to the node that is to be added to the list. - * After - Pointer to a list in a node after which the new node - * will be inserted. If NULL, then the new node will - * be added at the head of the list. - * - * Output: A pointer to the node that was inserted into the list (i.e., - * the same as <New>). - * - * ------------------------------------------------------------------------ ** - */ - -ubi_slNodePtr ubi_slRemoveNext( ubi_slListPtr ListPtr, ubi_slNodePtr AfterMe ); - /* ------------------------------------------------------------------------ ** - * Remove the node followng <AfterMe>. If <AfterMe> is NULL, remove from - * the head of the list. - * - * Input: ListPtr - A pointer to the list from which the node is to be - * removed. - * AfterMe - Pointer to the node preceeding the node to be - * removed. - * - * Output: A pointer to the node that was removed, or NULL if the list is - * empty. - * - * ------------------------------------------------------------------------ ** - */ - -/* ================================ The End ================================= */ -#endif /* UBI_SLINKLIST_H */ |