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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [libnetworking/] [rtems_webserver/] [ej.h] - Rev 173
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/* * ej.h -- Ejscript(TM) header * * Copyright (c) Go Ahead Software, Inc., 1992-1999 * * See the file "license.txt" for information on usage and redistribution */ #ifndef _h_EJ #define _h_EJ 1 /******************************** Description *********************************/ /* * Go Ahead Ejscript(TM) header. This defines the Ejscript API and internal * structures. */ /********************************* Includes ***********************************/ #include <ctype.h> #include <stdarg.h> #include <stdlib.h> #ifndef CE #include <fcntl.h> #endif #if LYNX #include <unistd.h> #endif #ifdef QNX4 #include <dirent.h> #endif #if UEMF #include "uemf.h" #else #include <param.h> #include <stat.h> #include "basic/basicInternal.h" #include "emf/emf.h" #include "webs/webs.h" #endif /********************************** Defines ***********************************/ /* * Constants */ #define EJ_INC 110 /* Growth for tags/tokens */ #define EJ_OFFSET 1 /* hAlloc doesn't like 0 entries */ #define EJ_MAX_RECURSE 100 /* Sanity for maximum recursion */ /* * Ejscript Lexical analyser tokens */ #define TOK_ERR -1 /* Any error */ #define TOK_LPAREN 1 /* ( */ #define TOK_RPAREN 2 /* ) */ #define TOK_IF 3 /* if */ #define TOK_ELSE 4 /* else */ #define TOK_LBRACE 5 /* { */ #define TOK_RBRACE 6 /* } */ #define TOK_LOGICAL 7 /* ||, &&, ! */ #define TOK_EXPR 8 /* +, -, /, % */ #define TOK_SEMI 9 /* ; */ #define TOK_LITERAL 10 /* literal string */ #define TOK_FUNCTION 11 /* function name */ #define TOK_NEWLINE 12 /* newline white space */ #define TOK_ID 13 /* function name */ #define TOK_EOF 14 /* End of script */ #define TOK_COMMA 15 /* Comma */ #define TOK_VAR 16 /* var */ #define TOK_ASSIGNMENT 17 /* = */ #define TOK_FOR 18 /* for */ #define TOK_INC_DEC 19 /* ++, -- */ #define TOK_RETURN 20 /* return */ /* * Expression operators */ #define EXPR_LESS 1 /* < */ #define EXPR_LESSEQ 2 /* <= */ #define EXPR_GREATER 3 /* > */ #define EXPR_GREATEREQ 4 /* >= */ #define EXPR_EQ 5 /* == */ #define EXPR_NOTEQ 6 /* != */ #define EXPR_PLUS 7 /* + */ #define EXPR_MINUS 8 /* - */ #define EXPR_DIV 9 /* / */ #define EXPR_MOD 10 /* % */ #define EXPR_LSHIFT 11 /* << */ #define EXPR_RSHIFT 12 /* >> */ #define EXPR_MUL 13 /* * */ #define EXPR_ASSIGNMENT 14 /* = */ #define EXPR_INC 15 /* ++ */ #define EXPR_DEC 16 /* -- */ /* * Conditional operators */ #define COND_AND 1 /* && */ #define COND_OR 2 /* || */ #define COND_NOT 3 /* ! */ /* * States */ #define STATE_ERR -1 /* Error state */ #define STATE_EOF 1 /* End of file */ #define STATE_COND 2 /* Parsing a "(conditional)" stmt */ #define STATE_COND_DONE 3 #define STATE_RELEXP 4 /* Parsing a relational expr */ #define STATE_RELEXP_DONE 5 #define STATE_EXPR 6 /* Parsing an expression */ #define STATE_EXPR_DONE 7 #define STATE_STMT 8 /* Parsing General statement */ #define STATE_STMT_DONE 9 #define STATE_STMT_BLOCK_DONE 10 /* End of block "}" */ #define STATE_ARG_LIST 11 /* Function arg list */ #define STATE_ARG_LIST_DONE 12 #define STATE_DEC_LIST 16 /* Declaration list */ #define STATE_DEC_LIST_DONE 17 #define STATE_DEC 18 #define STATE_DEC_DONE 19 #define STATE_BEGIN STATE_STMT /* * Flags. Used in ej_t and as parameter to parse() */ #define FLAGS_EXE 0x1 /* Execute statements */ #define FLAGS_VARIABLES 0x2 /* Allocated variables store */ #define FLAGS_FUNCTIONS 0x4 /* Allocated function store */ /* * Function call structure */ typedef struct { char_t *fname; /* Function name */ char_t **args; /* Args for function (halloc) */ int nArgs; /* Number of args */ } ejfunc_t; /* * EJ evaluation block structure */ typedef struct ejEval { ringq_t tokbuf; /* Current token */ ringq_t script; /* Input script for parsing */ char_t *putBackToken; /* Putback token string */ int putBackTokenId; /* Putback token ID */ char_t *line; /* Current line */ int lineLength; /* Current line length */ int lineNumber; /* Parse line number */ int lineColumn; /* Column in line */ } ejinput_t; /* * Per Ejscript session structure */ typedef struct ej { ejinput_t *input; /* Input evaluation block */ sym_fd_t functions; /* Symbol table for functions */ sym_fd_t *variables; /* hAlloc list of variables */ int variableMax; /* Number of entries */ ejfunc_t *func; /* Current function */ char_t *result; /* Current expression result */ char_t *error; /* Error message */ char_t *token; /* Pointer to token string */ int tid; /* Current token id */ int eid; /* Halloc handle */ int flags; /* Flags */ int userHandle; /* User defined handle */ } ej_t; /******************************** Prototypes **********************************/ extern int ejOpenEngine(sym_fd_t variables, sym_fd_t functions); extern void ejCloseEngine(int eid); extern int ejOpenBlock(int eid); extern int ejCloseBlock(int eid, int vid); extern char_t *ejEval(int eid, char_t *script, char_t **emsg); extern char_t *ejEvalBlock(int eid, char_t *script, char_t **emsg); extern char_t *ejEvalFile(int eid, char_t *path, char_t **emsg); extern int ejSetGlobalFunction(int eid, char_t *name, int (*fn)(int eid, void *handle, int argc, char_t **argv)); extern void *ejGetGlobalFunction(int eid, char_t *name); extern int ejSetGlobalFunctionDirect(sym_fd_t functions, char_t *name, int (*fn)(int eid, void *handle, int argc, char_t **argv)); extern int ejArgs(int argc, char_t **argv, char_t *fmt, ...); extern void ejError(ej_t* ep, char_t* fmt, ...); extern void ejSetUserHandle(int eid, int handle); extern int ejGetUserHandle(int eid); extern int ejGetLineNumber(int eid); extern void ejSetResult(int eid, char_t *s); extern char_t *ejGetResult(int eid); extern void ejSetVar(int eid, char_t *var, char_t *value); extern void ejSetLocalVar(int eid, char_t *var, char_t *value); extern int ejGetVar(int eid, char_t *var, char_t **value); extern void ejSetGlobalVar(int eid, char_t *var, char_t *value); extern int ejLexOpen(ej_t* ep); extern void ejLexClose(ej_t* ep); extern int ejLexOpenScript(ej_t* ep, char_t *script); extern void ejLexCloseScript(ej_t* ep); extern void ejLexSaveInputState(ej_t* ep, ejinput_t* state); extern void ejLexFreeInputState(ej_t* ep, ejinput_t* state); extern void ejLexRestoreInputState(ej_t* ep, ejinput_t* state); extern int ejLexGetToken(ej_t* ep, int state); extern void ejLexPutbackToken(ej_t* ep, int tid, char_t *string); extern sym_fd_t ejGetVariableTable(int eid); extern sym_fd_t ejGetFunctionTable(int eid); extern int ejEmfOpen(int eid); extern void ejEmfClose(int eid); extern int ejEmfDbRead(int eid, void *handle, int argc, char_t **argv); extern int ejEmfDbReadKeyed(int eid, void *handle, int argc, char_t **argv); extern int ejEmfDbTableGetNrow(int eid, void *handle, int argc, char_t **argv); extern int ejEmfTrace(int eid, void *handle, int argc, char_t **argv); extern int ejEmfDbWrite(int eid, void *handle, int argc, char_t **argv); #endif /* _h_EJ */ /*****************************************************************************/