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/*
Unix SMB/CIFS implementation.
Samba utility functions
Copyright (C) Andrew Tridgell 1992-2001
Copyright (C) Simo Sorce 2001
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "includes.h"
/* these 3 tables define the unicode case handling. They are loaded
at startup either via mmap() or read() from the lib directory */
static smb_ucs2_t *upcase_table;
static smb_ucs2_t *lowcase_table;
static uint8 *valid_table;
/*******************************************************************
load the case handling tables
********************************************************************/
void load_case_tables(void)
{
static int initialised;
int i;
TALLOC_CTX *mem_ctx;
if (initialised) return;
initialised = 1;
mem_ctx = talloc_init("load_case_tables");
if (!mem_ctx) {
smb_panic("No memory for case_tables");
}
upcase_table = map_file(lib_path(mem_ctx, "upcase.dat"), 0x20000);
lowcase_table = map_file(lib_path(mem_ctx, "lowcase.dat"), 0x20000);
talloc_destroy(mem_ctx);
/* we would like Samba to limp along even if these tables are
not available */
if (!upcase_table) {
DEBUG(1,("creating lame upcase table\n"));
upcase_table = malloc(0x20000);
if (!upcase_table) {
smb_panic("No memory for upcase tables");
}
for (i=0;i<0x10000;i++) {
smb_ucs2_t v;
SSVAL(&v, 0, i);
upcase_table[v] = i;
}
for (i=0;i<256;i++) {
smb_ucs2_t v;
SSVAL(&v, 0, UCS2_CHAR(i));
upcase_table[v] = UCS2_CHAR(islower(i)?toupper(i):i);
}
}
if (!lowcase_table) {
DEBUG(1,("creating lame lowcase table\n"));
lowcase_table = malloc(0x20000);
if (!lowcase_table) {
smb_panic("No memory for lowcase tables");
}
for (i=0;i<0x10000;i++) {
smb_ucs2_t v;
SSVAL(&v, 0, i);
lowcase_table[v] = i;
}
for (i=0;i<256;i++) {
smb_ucs2_t v;
SSVAL(&v, 0, UCS2_CHAR(i));
lowcase_table[v] = UCS2_CHAR(isupper(i)?tolower(i):i);
}
}
}
/*
see if a ucs2 character can be mapped correctly to a dos character
and mapped back to the same character in ucs2
*/
static int check_dos_char(smb_ucs2_t c)
{
char buf[10];
smb_ucs2_t c2 = 0;
int len1, len2;
len1 = convert_string(CH_UCS2, CH_DOS, &c, 2, buf, sizeof(buf));
if (len1 == 0) return 0;
len2 = convert_string(CH_DOS, CH_UCS2, buf, len1, &c2, 2);
if (len2 != 2) return 0;
return (c == c2);
}
/**
* Load the valid character map table from <tt>valid.dat</tt> or
* create from the configured codepage.
*
* This function is called whenever the configuration is reloaded.
* However, the valid character table is not changed if it's loaded
* from a file, because we can't unmap files.
**/
void init_valid_table(void)
{
static int mapped_file;
int i;
const char *allowed = ".!#$%&'()_-@^`~";
uint8 *valid_file;
TALLOC_CTX *mem_ctx;
if (mapped_file) {
/* Can't unmap files, so stick with what we have */
return;
}
mem_ctx = talloc_init("init_valid_table");
if (!mem_ctx) {
smb_panic("No memory for valid_table");
}
valid_file = map_file(lib_path(mem_ctx, "valid.dat"), 0x10000);
talloc_destroy(mem_ctx);
if (valid_file) {
valid_table = valid_file;
mapped_file = 1;
return;
}
/* Otherwise, we're using a dynamically created valid_table.
* It might need to be regenerated if the code page changed.
* We know that we're not using a mapped file, so we can
* free() the old one. */
if (valid_table) free(valid_table);
DEBUG(2,("creating default valid table\n"));
valid_table = malloc(0x10000);
if (!valid_table) {
smb_panic("No memory for valid_table");
}
for (i=0;i<128;i++)
valid_table[i] = isalnum(i) || strchr(allowed,i);
for (;i<0x10000;i++) {
smb_ucs2_t c;
SSVAL(&c, 0, i);
valid_table[i] = check_dos_char(c);
}
}
/*******************************************************************
Convert a wchar to upper case.
********************************************************************/
static smb_ucs2_t toupper_w(smb_ucs2_t val)
{
return upcase_table[SVAL(&val,0)];
}
/*******************************************************************
Convert a wchar to lower case.
********************************************************************/
static smb_ucs2_t tolower_w( smb_ucs2_t val )
{
return lowcase_table[SVAL(&val,0)];
}
/*******************************************************************
determine if a character is lowercase
********************************************************************/
BOOL islower_w(smb_ucs2_t c)
{
return upcase_table[SVAL(&c,0)] != c;
}
/*******************************************************************
determine if a character is uppercase
********************************************************************/
BOOL isupper_w(smb_ucs2_t c)
{
return lowcase_table[SVAL(&c,0)] != c;
}
/*******************************************************************
Count the number of characters in a smb_ucs2_t string.
********************************************************************/
size_t strlen_w(const smb_ucs2_t *src)
{
size_t len;
for (len = 0; SVAL(src,0); len++, src++) ;
return len;
}
/*******************************************************************
Count up to max number of characters in a smb_ucs2_t string.
********************************************************************/
size_t strnlen_w(const smb_ucs2_t *src, size_t max)
{
size_t len;
for (len = 0; (len < max) && SVAL(src, 0); len++, src++) ;
return len;
}
/*******************************************************************
wide strchr()
********************************************************************/
const smb_ucs2_t *strchr_w(const smb_ucs2_t *s, smb_ucs2_t c)
{
while (*s != 0) {
if (c == *s) return s;
s++;
}
if (c == *s) return s;
return NULL;
}
const smb_ucs2_t *strchr_wa(const smb_ucs2_t *s, char c)
{
return strchr_w(s, UCS2_CHAR(c));
}
const smb_ucs2_t *strrchr_w(const smb_ucs2_t *s, smb_ucs2_t c)
{
const smb_ucs2_t *p = s;
int len = strlen_w(s);
if (len == 0) return NULL;
p += (len - 1);
do {
if (c == *p) return p;
} while (p-- != s);
return NULL;
}
static int strncmp_w(const smb_ucs2_t *a, const smb_ucs2_t *b, size_t len)
{
size_t n = 0;
while ((n < len) && *b && *a == *b) { a++; b++; n++;}
return (len - n)?(*a - *b):0;
}
/*******************************************************************
Convert a string to lower case.
return True if any char is converted
********************************************************************/
BOOL strlower_w(smb_ucs2_t *s)
{
BOOL ret = False;
while (*s) {
smb_ucs2_t v = tolower_w(*s);
if (v != *s) {
*s = v;
ret = True;
}
s++;
}
return ret;
}
/*******************************************************************
Convert a string to upper case.
return True if any char is converted
********************************************************************/
BOOL strupper_w(smb_ucs2_t *s)
{
BOOL ret = False;
while (*s) {
smb_ucs2_t v = toupper_w(*s);
if (v != *s) {
*s = v;
ret = True;
}
s++;
}
return ret;
}
/*******************************************************************
case insensitive string comparison
********************************************************************/
int strcasecmp_w(const smb_ucs2_t *a, const smb_ucs2_t *b)
{
while (*b && toupper_w(*a) == toupper_w(*b)) { a++; b++; }
return (tolower_w(*a) - tolower_w(*b));
}
/*******************************************************************
replace any occurence of oldc with newc in unicode string
********************************************************************/
void string_replace_w(smb_ucs2_t *s, smb_ucs2_t oldc, smb_ucs2_t newc)
{
for(;*s;s++) {
if(*s==oldc) *s=newc;
}
}
/*
The *_wa() functions take a combination of 7 bit ascii
and wide characters They are used so that you can use string
functions combining C string constants with ucs2 strings
The char* arguments must NOT be multibyte - to be completely sure
of this only pass string constants */
void pstrcpy_wa(smb_ucs2_t *dest, const char *src)
{
int i;
for (i=0;i<PSTRING_LEN;i++) {
dest[i] = UCS2_CHAR(src[i]);
if (src[i] == 0) return;
}
}
int strcmp_wa(const smb_ucs2_t *a, const char *b)
{
while (*b && *a == UCS2_CHAR(*b)) { a++; b++; }
return (*a - UCS2_CHAR(*b));
}
const smb_ucs2_t *strpbrk_wa(const smb_ucs2_t *s, const char *p)
{
while (*s != 0) {
int i;
for (i=0; p[i] && *s != UCS2_CHAR(p[i]); i++)
;
if (p[i]) return s;
s++;
}
return NULL;
}
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