| 1 |
30 |
unneback |
/*
|
| 2 |
|
|
* ej.h -- Ejscript(TM) header
|
| 3 |
|
|
*
|
| 4 |
|
|
* Copyright (c) Go Ahead Software, Inc., 1992-1999
|
| 5 |
|
|
*
|
| 6 |
|
|
* See the file "license.txt" for information on usage and redistribution
|
| 7 |
|
|
*/
|
| 8 |
|
|
|
| 9 |
|
|
#ifndef _h_EJ
|
| 10 |
|
|
#define _h_EJ 1
|
| 11 |
|
|
|
| 12 |
|
|
/******************************** Description *********************************/
|
| 13 |
|
|
|
| 14 |
|
|
/*
|
| 15 |
|
|
* Go Ahead Ejscript(TM) header. This defines the Ejscript API and internal
|
| 16 |
|
|
* structures.
|
| 17 |
|
|
*/
|
| 18 |
|
|
|
| 19 |
|
|
/********************************* Includes ***********************************/
|
| 20 |
|
|
|
| 21 |
|
|
#include <ctype.h>
|
| 22 |
|
|
#include <stdarg.h>
|
| 23 |
|
|
#include <stdlib.h>
|
| 24 |
|
|
#ifndef CE
|
| 25 |
|
|
#include <fcntl.h>
|
| 26 |
|
|
#endif
|
| 27 |
|
|
|
| 28 |
|
|
#if LYNX
|
| 29 |
|
|
#include <unistd.h>
|
| 30 |
|
|
#endif
|
| 31 |
|
|
|
| 32 |
|
|
#ifdef QNX4
|
| 33 |
|
|
#include <dirent.h>
|
| 34 |
|
|
#endif
|
| 35 |
|
|
|
| 36 |
|
|
#if UEMF
|
| 37 |
|
|
#include "uemf.h"
|
| 38 |
|
|
#else
|
| 39 |
|
|
#include <param.h>
|
| 40 |
|
|
#include <stat.h>
|
| 41 |
|
|
#include "basic/basicInternal.h"
|
| 42 |
|
|
#include "emf/emf.h"
|
| 43 |
|
|
#include "webs/webs.h"
|
| 44 |
|
|
#endif
|
| 45 |
|
|
|
| 46 |
|
|
/********************************** Defines ***********************************/
|
| 47 |
|
|
/*
|
| 48 |
|
|
* Constants
|
| 49 |
|
|
*/
|
| 50 |
|
|
#define EJ_INC 110 /* Growth for tags/tokens */
|
| 51 |
|
|
#define EJ_OFFSET 1 /* hAlloc doesn't like 0 entries */
|
| 52 |
|
|
#define EJ_MAX_RECURSE 100 /* Sanity for maximum recursion */
|
| 53 |
|
|
|
| 54 |
|
|
/*
|
| 55 |
|
|
* Ejscript Lexical analyser tokens
|
| 56 |
|
|
*/
|
| 57 |
|
|
#define TOK_ERR -1 /* Any error */
|
| 58 |
|
|
#define TOK_LPAREN 1 /* ( */
|
| 59 |
|
|
#define TOK_RPAREN 2 /* ) */
|
| 60 |
|
|
#define TOK_IF 3 /* if */
|
| 61 |
|
|
#define TOK_ELSE 4 /* else */
|
| 62 |
|
|
#define TOK_LBRACE 5 /* { */
|
| 63 |
|
|
#define TOK_RBRACE 6 /* } */
|
| 64 |
|
|
#define TOK_LOGICAL 7 /* ||, &&, ! */
|
| 65 |
|
|
#define TOK_EXPR 8 /* +, -, /, % */
|
| 66 |
|
|
#define TOK_SEMI 9 /* ; */
|
| 67 |
|
|
#define TOK_LITERAL 10 /* literal string */
|
| 68 |
|
|
#define TOK_FUNCTION 11 /* function name */
|
| 69 |
|
|
#define TOK_NEWLINE 12 /* newline white space */
|
| 70 |
|
|
#define TOK_ID 13 /* function name */
|
| 71 |
|
|
#define TOK_EOF 14 /* End of script */
|
| 72 |
|
|
#define TOK_COMMA 15 /* Comma */
|
| 73 |
|
|
#define TOK_VAR 16 /* var */
|
| 74 |
|
|
#define TOK_ASSIGNMENT 17 /* = */
|
| 75 |
|
|
#define TOK_FOR 18 /* for */
|
| 76 |
|
|
#define TOK_INC_DEC 19 /* ++, -- */
|
| 77 |
|
|
#define TOK_RETURN 20 /* return */
|
| 78 |
|
|
|
| 79 |
|
|
/*
|
| 80 |
|
|
* Expression operators
|
| 81 |
|
|
*/
|
| 82 |
|
|
#define EXPR_LESS 1 /* < */
|
| 83 |
|
|
#define EXPR_LESSEQ 2 /* <= */
|
| 84 |
|
|
#define EXPR_GREATER 3 /* > */
|
| 85 |
|
|
#define EXPR_GREATEREQ 4 /* >= */
|
| 86 |
|
|
#define EXPR_EQ 5 /* == */
|
| 87 |
|
|
#define EXPR_NOTEQ 6 /* != */
|
| 88 |
|
|
#define EXPR_PLUS 7 /* + */
|
| 89 |
|
|
#define EXPR_MINUS 8 /* - */
|
| 90 |
|
|
#define EXPR_DIV 9 /* / */
|
| 91 |
|
|
#define EXPR_MOD 10 /* % */
|
| 92 |
|
|
#define EXPR_LSHIFT 11 /* << */
|
| 93 |
|
|
#define EXPR_RSHIFT 12 /* >> */
|
| 94 |
|
|
#define EXPR_MUL 13 /* * */
|
| 95 |
|
|
#define EXPR_ASSIGNMENT 14 /* = */
|
| 96 |
|
|
#define EXPR_INC 15 /* ++ */
|
| 97 |
|
|
#define EXPR_DEC 16 /* -- */
|
| 98 |
|
|
|
| 99 |
|
|
/*
|
| 100 |
|
|
* Conditional operators
|
| 101 |
|
|
*/
|
| 102 |
|
|
#define COND_AND 1 /* && */
|
| 103 |
|
|
#define COND_OR 2 /* || */
|
| 104 |
|
|
#define COND_NOT 3 /* ! */
|
| 105 |
|
|
|
| 106 |
|
|
/*
|
| 107 |
|
|
* States
|
| 108 |
|
|
*/
|
| 109 |
|
|
#define STATE_ERR -1 /* Error state */
|
| 110 |
|
|
#define STATE_EOF 1 /* End of file */
|
| 111 |
|
|
#define STATE_COND 2 /* Parsing a "(conditional)" stmt */
|
| 112 |
|
|
#define STATE_COND_DONE 3
|
| 113 |
|
|
#define STATE_RELEXP 4 /* Parsing a relational expr */
|
| 114 |
|
|
#define STATE_RELEXP_DONE 5
|
| 115 |
|
|
#define STATE_EXPR 6 /* Parsing an expression */
|
| 116 |
|
|
#define STATE_EXPR_DONE 7
|
| 117 |
|
|
#define STATE_STMT 8 /* Parsing General statement */
|
| 118 |
|
|
#define STATE_STMT_DONE 9
|
| 119 |
|
|
#define STATE_STMT_BLOCK_DONE 10 /* End of block "}" */
|
| 120 |
|
|
#define STATE_ARG_LIST 11 /* Function arg list */
|
| 121 |
|
|
#define STATE_ARG_LIST_DONE 12
|
| 122 |
|
|
#define STATE_DEC_LIST 16 /* Declaration list */
|
| 123 |
|
|
#define STATE_DEC_LIST_DONE 17
|
| 124 |
|
|
#define STATE_DEC 18
|
| 125 |
|
|
#define STATE_DEC_DONE 19
|
| 126 |
|
|
#define STATE_BEGIN STATE_STMT
|
| 127 |
|
|
|
| 128 |
|
|
/*
|
| 129 |
|
|
* Flags. Used in ej_t and as parameter to parse()
|
| 130 |
|
|
*/
|
| 131 |
|
|
#define FLAGS_EXE 0x1 /* Execute statements */
|
| 132 |
|
|
#define FLAGS_VARIABLES 0x2 /* Allocated variables store */
|
| 133 |
|
|
#define FLAGS_FUNCTIONS 0x4 /* Allocated function store */
|
| 134 |
|
|
|
| 135 |
|
|
/*
|
| 136 |
|
|
* Function call structure
|
| 137 |
|
|
*/
|
| 138 |
|
|
typedef struct {
|
| 139 |
|
|
char_t *fname; /* Function name */
|
| 140 |
|
|
char_t **args; /* Args for function (halloc) */
|
| 141 |
|
|
int nArgs; /* Number of args */
|
| 142 |
|
|
} ejfunc_t;
|
| 143 |
|
|
|
| 144 |
|
|
/*
|
| 145 |
|
|
* EJ evaluation block structure
|
| 146 |
|
|
*/
|
| 147 |
|
|
typedef struct ejEval {
|
| 148 |
|
|
ringq_t tokbuf; /* Current token */
|
| 149 |
|
|
ringq_t script; /* Input script for parsing */
|
| 150 |
|
|
char_t *putBackToken; /* Putback token string */
|
| 151 |
|
|
int putBackTokenId; /* Putback token ID */
|
| 152 |
|
|
char_t *line; /* Current line */
|
| 153 |
|
|
int lineLength; /* Current line length */
|
| 154 |
|
|
int lineNumber; /* Parse line number */
|
| 155 |
|
|
int lineColumn; /* Column in line */
|
| 156 |
|
|
} ejinput_t;
|
| 157 |
|
|
|
| 158 |
|
|
/*
|
| 159 |
|
|
* Per Ejscript session structure
|
| 160 |
|
|
*/
|
| 161 |
|
|
typedef struct ej {
|
| 162 |
|
|
ejinput_t *input; /* Input evaluation block */
|
| 163 |
|
|
sym_fd_t functions; /* Symbol table for functions */
|
| 164 |
|
|
sym_fd_t *variables; /* hAlloc list of variables */
|
| 165 |
|
|
int variableMax; /* Number of entries */
|
| 166 |
|
|
ejfunc_t *func; /* Current function */
|
| 167 |
|
|
char_t *result; /* Current expression result */
|
| 168 |
|
|
char_t *error; /* Error message */
|
| 169 |
|
|
char_t *token; /* Pointer to token string */
|
| 170 |
|
|
int tid; /* Current token id */
|
| 171 |
|
|
int eid; /* Halloc handle */
|
| 172 |
|
|
int flags; /* Flags */
|
| 173 |
|
|
int userHandle; /* User defined handle */
|
| 174 |
|
|
} ej_t;
|
| 175 |
|
|
|
| 176 |
|
|
/******************************** Prototypes **********************************/
|
| 177 |
|
|
|
| 178 |
|
|
extern int ejOpenEngine(sym_fd_t variables, sym_fd_t functions);
|
| 179 |
|
|
extern void ejCloseEngine(int eid);
|
| 180 |
|
|
extern int ejOpenBlock(int eid);
|
| 181 |
|
|
extern int ejCloseBlock(int eid, int vid);
|
| 182 |
|
|
extern char_t *ejEval(int eid, char_t *script, char_t **emsg);
|
| 183 |
|
|
extern char_t *ejEvalBlock(int eid, char_t *script, char_t **emsg);
|
| 184 |
|
|
extern char_t *ejEvalFile(int eid, char_t *path, char_t **emsg);
|
| 185 |
|
|
extern int ejSetGlobalFunction(int eid, char_t *name,
|
| 186 |
|
|
int (*fn)(int eid, void *handle, int argc, char_t **argv));
|
| 187 |
|
|
extern void *ejGetGlobalFunction(int eid, char_t *name);
|
| 188 |
|
|
extern int ejSetGlobalFunctionDirect(sym_fd_t functions, char_t *name,
|
| 189 |
|
|
int (*fn)(int eid, void *handle, int argc, char_t **argv));
|
| 190 |
|
|
extern int ejArgs(int argc, char_t **argv, char_t *fmt, ...);
|
| 191 |
|
|
extern void ejError(ej_t* ep, char_t* fmt, ...);
|
| 192 |
|
|
extern void ejSetUserHandle(int eid, int handle);
|
| 193 |
|
|
extern int ejGetUserHandle(int eid);
|
| 194 |
|
|
extern int ejGetLineNumber(int eid);
|
| 195 |
|
|
extern void ejSetResult(int eid, char_t *s);
|
| 196 |
|
|
extern char_t *ejGetResult(int eid);
|
| 197 |
|
|
extern void ejSetVar(int eid, char_t *var, char_t *value);
|
| 198 |
|
|
extern void ejSetLocalVar(int eid, char_t *var, char_t *value);
|
| 199 |
|
|
extern int ejGetVar(int eid, char_t *var, char_t **value);
|
| 200 |
|
|
extern void ejSetGlobalVar(int eid, char_t *var, char_t *value);
|
| 201 |
|
|
|
| 202 |
|
|
extern int ejLexOpen(ej_t* ep);
|
| 203 |
|
|
extern void ejLexClose(ej_t* ep);
|
| 204 |
|
|
extern int ejLexOpenScript(ej_t* ep, char_t *script);
|
| 205 |
|
|
extern void ejLexCloseScript(ej_t* ep);
|
| 206 |
|
|
extern void ejLexSaveInputState(ej_t* ep, ejinput_t* state);
|
| 207 |
|
|
extern void ejLexFreeInputState(ej_t* ep, ejinput_t* state);
|
| 208 |
|
|
extern void ejLexRestoreInputState(ej_t* ep, ejinput_t* state);
|
| 209 |
|
|
extern int ejLexGetToken(ej_t* ep, int state);
|
| 210 |
|
|
extern void ejLexPutbackToken(ej_t* ep, int tid, char_t *string);
|
| 211 |
|
|
|
| 212 |
|
|
extern sym_fd_t ejGetVariableTable(int eid);
|
| 213 |
|
|
extern sym_fd_t ejGetFunctionTable(int eid);
|
| 214 |
|
|
|
| 215 |
|
|
extern int ejEmfOpen(int eid);
|
| 216 |
|
|
extern void ejEmfClose(int eid);
|
| 217 |
|
|
|
| 218 |
|
|
extern int ejEmfDbRead(int eid, void *handle, int argc, char_t **argv);
|
| 219 |
|
|
extern int ejEmfDbReadKeyed(int eid, void *handle, int argc, char_t **argv);
|
| 220 |
|
|
extern int ejEmfDbTableGetNrow(int eid, void *handle, int argc, char_t **argv);
|
| 221 |
|
|
extern int ejEmfTrace(int eid, void *handle, int argc, char_t **argv);
|
| 222 |
|
|
extern int ejEmfDbWrite(int eid, void *handle, int argc, char_t **argv);
|
| 223 |
|
|
|
| 224 |
|
|
#endif /* _h_EJ */
|
| 225 |
|
|
|
| 226 |
|
|
/*****************************************************************************/
|
