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+/*
+ * @file ejsInternal.h
+ * @brief Private header for Embedded Javascript (ECMAScript)
+ * @overview This Embedded Javascript header defines the private Embedded
+ * Javascript internal structures.
+ */
+/********************************* Copyright **********************************/
+/*
+ * @copy default.g
+ *
+ * Copyright (c) Mbedthis Software LLC, 2003-2005. All Rights Reserved.
+ * Portions Copyright (c) GoAhead Software, 1995-2000. All Rights Reserved.
+ *
+ * This software is distributed under commercial and open source licenses.
+ * You may use the GPL open source license described below or you may acquire
+ * a commercial license from Mbedthis Software. You agree to be fully bound
+ * by the terms of either license. Consult the LICENSE.TXT distributed with
+ * this software for full details.
+ *
+ * This software is open source; 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. See the GNU General Public License for more
+ * details at: http://www.mbedthis.com/downloads/gplLicense.html
+ *
+ * This program is distributed WITHOUT ANY WARRANTY; without even the
+ * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * This GPL license does NOT permit incorporating this software into
+ * proprietary programs. If you are unable to comply with the GPL, you must
+ * acquire a commercial license to use this software. Commercial licenses
+ * for this software and support services are available from Mbedthis
+ * Software at http://www.mbedthis.com
+ *
+ * @end
+ */
+/********************************* Includes ***********************************/
+
+#ifndef _h_EJS_INTERNAL
+#define _h_EJS_INTERNAL 1
+
+#include "lib/ejs/ejs.h"
+
+/********************************** Defines ***********************************/
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+ * Constants
+ */
+
+#if BLD_FEATURE_SQUEEZE
+ #define EJS_PARSE_INCR 256 /* Growth factor */
+ #define EJS_MAX_RECURSE 25 /* Sanity for maximum recursion */
+ #define EJS_MAX_ID 128 /* Maximum ID length */
+ #define EJS_OBJ_HASH_SIZE 13 /* Object hash table size */
+ #define EJS_SMALL_OBJ_HASH_SIZE 11 /* Small object hash size */
+ #define EJS_LIST_INCR 8 /* Growth increment for lists */
+#else
+ #define EJS_PARSE_INCR 1024 /* Growth factor */
+ #define EJS_MAX_RECURSE 100 /* Sanity for maximum recursion */
+ #define EJS_MAX_ID 256 /* Maximum ID length */
+ #define EJS_OBJ_HASH_SIZE 29 /* Object hash table size */
+ #define EJS_SMALL_OBJ_HASH_SIZE 11 /* Small object hash size */
+ #define EJS_LIST_INCR 16 /* Growth increment for lists */
+#endif
+#define EJS_TOKEN_STACK 4 /* Put back token stack */
+
+/*
+ * Lexical analyser tokens
+ */
+#define EJS_TOK_ERR -1 /* Any error */
+#define EJS_TOK_LPAREN 1 /* ( */
+#define EJS_TOK_RPAREN 2 /* ) */
+#define EJS_TOK_IF 3 /* if */
+#define EJS_TOK_ELSE 4 /* else */
+#define EJS_TOK_LBRACE 5 /* { */
+#define EJS_TOK_RBRACE 6 /* } */
+#define EJS_TOK_LOGICAL 7 /* ||, &&, ! */
+#define EJS_TOK_EXPR 8 /* +, -, /, % */
+#define EJS_TOK_SEMI 9 /* ; */
+#define EJS_TOK_LITERAL 10 /* literal string */
+#define EJS_TOK_FUNCTION_NAME 11 /* functionName */
+#define EJS_TOK_NEWLINE 12 /* newline white space */
+#define EJS_TOK_ID 13 /* Identifier */
+#define EJS_TOK_EOF 14 /* End of script */
+#define EJS_TOK_COMMA 15 /* Comma */
+#define EJS_TOK_VAR 16 /* var */
+#define EJS_TOK_ASSIGNMENT 17 /* = */
+#define EJS_TOK_FOR 18 /* for */
+#define EJS_TOK_INC_DEC 19 /* ++, -- */
+#define EJS_TOK_RETURN 20 /* return */
+#define EJS_TOK_PERIOD 21 /* . */
+#define EJS_TOK_LBRACKET 22 /* [ */
+#define EJS_TOK_RBRACKET 23 /* ] */
+#define EJS_TOK_NEW 24 /* new */
+#define EJS_TOK_DELETE 25 /* delete */
+#define EJS_TOK_IN 26 /* in */
+#define EJS_TOK_FUNCTION 27 /* function */
+#define EJS_TOK_NUMBER 28 /* Number */
+
+/*
+ * Expression operators
+ */
+#define EJS_EXPR_LESS 1 /* < */
+#define EJS_EXPR_LESSEQ 2 /* <= */
+#define EJS_EXPR_GREATER 3 /* > */
+#define EJS_EXPR_GREATEREQ 4 /* >= */
+#define EJS_EXPR_EQ 5 /* == */
+#define EJS_EXPR_NOTEQ 6 /* != */
+#define EJS_EXPR_PLUS 7 /* + */
+#define EJS_EXPR_MINUS 8 /* - */
+#define EJS_EXPR_DIV 9 /* / */
+#define EJS_EXPR_MOD 10 /* % */
+#define EJS_EXPR_LSHIFT 11 /* << */
+#define EJS_EXPR_RSHIFT 12 /* >> */
+#define EJS_EXPR_MUL 13 /* * */
+#define EJS_EXPR_ASSIGNMENT 14 /* = */
+#define EJS_EXPR_INC 15 /* ++ */
+#define EJS_EXPR_DEC 16 /* -- */
+#define EJS_EXPR_BOOL_COMP 17 /* ! */
+
+/*
+ * Conditional operators
+ */
+#define EJS_COND_AND 1 /* && */
+#define EJS_COND_OR 2 /* || */
+#define EJS_COND_NOT 3 /* ! */
+
+/*
+ * States
+ */
+#define EJS_STATE_ERR -1 /* Error state */
+#define EJS_STATE_EOF 1 /* End of file */
+#define EJS_STATE_COND 2 /* Parsing a "(conditional)" stmt */
+#define EJS_STATE_COND_DONE 3
+#define EJS_STATE_RELEXP 4 /* Parsing a relational expr */
+#define EJS_STATE_RELEXP_DONE 5
+#define EJS_STATE_EXPR 6 /* Parsing an expression */
+#define EJS_STATE_EXPR_DONE 7
+#define EJS_STATE_STMT 8 /* Parsing General statement */
+#define EJS_STATE_STMT_DONE 9
+#define EJS_STATE_STMT_BLOCK_DONE 10 /* End of block "}" */
+#define EJS_STATE_ARG_LIST 11 /* Function arg list */
+#define EJS_STATE_ARG_LIST_DONE 12
+#define EJS_STATE_DEC_LIST 16 /* Declaration list */
+#define EJS_STATE_DEC_LIST_DONE 17
+#define EJS_STATE_DEC 18 /* Declaration statement */
+#define EJS_STATE_DEC_DONE 19
+#define EJS_STATE_RET 20 /* Return statement */
+
+#define EJS_STATE_BEGIN EJS_STATE_STMT
+
+/*
+ * General parsing flags.
+ */
+#define EJS_FLAGS_EXE 0x1 /* Execute statements */
+#define EJS_FLAGS_LOCAL 0x2 /* Get local vars only */
+#define EJS_FLAGS_GLOBAL 0x4 /* Get global vars only */
+#define EJS_FLAGS_CREATE 0x8 /* Create var */
+#define EJS_FLAGS_ASSIGNMENT 0x10 /* In assignment stmt */
+#define EJS_FLAGS_DELETE 0x20 /* Deleting a variable */
+#define EJS_FLAGS_FOREACH 0x40 /* In foreach */
+#define EJS_FLAGS_NEW 0x80 /* In a new stmt() */
+#define EJS_FLAGS_EXIT 0x100 /* Must exit */
+
+/*
+ * Putback token
+ */
+
+typedef struct EjsToken {
+ char *token; /* Token string */
+ int id; /* Token ID */
+} EjsToken;
+
+/*
+ * EJ evaluation block structure
+ */
+typedef struct ejEval {
+ EjsToken putBack[EJS_TOKEN_STACK]; /* Put back token stack */
+ int putBackIndex; /* Top of stack index */
+ MprStr line; /* Current line */
+ int lineLength; /* Current line length */
+ int lineNumber; /* Parse line number */
+ int lineColumn; /* Column in line */
+ MprStr script; /* Input script for parsing */
+ char *scriptServp; /* Next token in the script */
+ int scriptSize; /* Length of script */
+ MprStr tokbuf; /* Current token */
+ char *tokEndp; /* Pointer past end of token */
+ char *tokServp; /* Pointer to next token char */
+ int tokSize; /* Size of token buffer */
+} EjsInput;
+
+/*
+ * Function call structure
+ */
+typedef struct {
+ MprArray *args; /* Args for function */
+ MprVar *fn; /* Function definition */
+ char *procName; /* Function name */
+} EjsProc;
+
+/*
+ * Per EJS structure
+ */
+typedef struct ej {
+ EjsHandle altHandle; /* alternate callback handle */
+ MprVar *currentObj; /* Ptr to current object */
+ MprVar *currentProperty; /* Ptr to current property */
+ EjsId eid; /* Halloc handle */
+ char *error; /* Error message */
+ int exitStatus; /* Status to exit() */
+ int flags; /* Flags */
+ MprArray *frames; /* List of variable frames */
+ MprVar *global; /* Global object */
+ EjsInput *input; /* Input evaluation block */
+ MprVar *local; /* Local object */
+ EjsHandle primaryHandle; /* primary callback handle */
+ EjsProc *proc; /* Current function */
+ MprVar result; /* Variable result */
+ void *thisPtr; /* C++ ptr for functions */
+ int tid; /* Current token id */
+ char *token; /* Pointer to token string */
+ MprVar tokenNumber; /* Parsed number */
+} Ejs;
+
+typedef int EjsBlock; /* Scope block id */
+
+/*
+ * Function callback when using Alternate handles.
+ */
+typedef int (*EjsAltStringCFunction)(EjsHandle userHandle, EjsHandle altHandle,
+ int argc, char **argv);
+typedef int (*EjsAltCFunction)(EjsHandle userHandle, EjsHandle altHandle,
+ int argc, MprVar **argv);
+
+/******************************** Prototypes **********************************/
+/*
+ * Ejs Lex
+ */
+extern int ejsLexOpenScript(Ejs* ep, char *script);
+extern void ejsLexCloseScript(Ejs* ep);
+extern int ejsInitInputState(EjsInput *ip);
+extern void ejsLexSaveInputState(Ejs* ep, EjsInput* state);
+extern void ejsLexFreeInputState(Ejs* ep, EjsInput* state);
+extern void ejsLexRestoreInputState(Ejs* ep, EjsInput* state);
+extern int ejsLexGetToken(Ejs* ep, int state);
+extern void ejsLexPutbackToken(Ejs* ep, int tid, char *string);
+
+/*
+ * Parsing
+ */
+extern MprVar *ejsFindObj(Ejs *ep, int state, const char *property, int flags);
+extern MprVar *ejsFindProperty(Ejs *ep, int state, MprVar *obj,
+ char *property, int flags);
+extern int ejsGetVarCore(Ejs *ep, const char *var, MprVar **obj,
+ MprVar **varValue, int flags);
+extern int ejsParse(Ejs *ep, int state, int flags);
+extern Ejs *ejsPtr(EjsId eid);
+extern void ejsSetExitStatus(int eid, int status);
+extern void ejsSetFlags(int orFlags, int andFlags);
+
+/*
+ * Create variable scope blocks
+ */
+extern EjsBlock ejsOpenBlock(EjsId eid);
+extern int ejsCloseBlock(EjsId eid, EjsBlock vid);
+extern int ejsEvalBlock(EjsId eid, char *script, MprVar *v, char **err);
+extern int ejsDefineStandardProperties(MprVar *objVar);
+
+/*
+ * Error handling
+ */
+extern void ejsError(Ejs *ep, const char *fmt, ...) PRINTF_ATTRIBUTE(2,3);
+
+#ifdef __cplusplus
+}
+#endif
+#endif /* _h_EJS_INTERNAL */
+
+/*
+ * Local variables:
+ * tab-width: 4
+ * c-basic-offset: 4
+ * End:
+ * vim:tw=78
+ * vim600: sw=4 ts=4 fdm=marker
+ * vim<600: sw=4 ts=4
+ */