parser.cpp
来自「开放源码的编译器open watcom 1.6.0版的源代码」· C++ 代码 · 共 529 行 · 第 1/2 页
CPP
529 行
/****************************************************************************
*
* Open Watcom Project
*
* Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
*
* ========================================================================
*
* This file contains Original Code and/or Modifications of Original
* Code as defined in and that are subject to the Sybase Open Watcom
* Public License version 1.0 (the 'License'). You may not use this file
* except in compliance with the License. BY USING THIS FILE YOU AGREE TO
* ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is
* provided with the Original Code and Modifications, and is also
* available at www.sybase.com/developer/opensource.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM
* ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR
* NON-INFRINGEMENT. Please see the License for the specific language
* governing rights and limitations under the License.
*
* ========================================================================
*
* Description: WHEN YOU FIGURE OUT WHAT THIS FILE DOES, PLEASE
* DESCRIBE IT HERE!
*
****************************************************************************/
#define YYBYACC 1
#line 2 "parser.y"
#include <time.h>
#include <iostream.h>
#include "globals.h"
#include "parser.h"
int yyparse();
int yylex();
void yyerror(char*);
static uint accept;
static RegExp *spec;
static Scanner *in;
#line 19 "parser.y"
typedef union {
Symbol *symbol;
RegExp *regexp;
Token *token;
char op;
} YYSTYPE;
#line 27 "y.tab.c"
#define CLOSE 257
#define ID 258
#define CODE 259
#define RANGE 260
#define STRING 261
#define YYERRCODE 256
short yylhs[] = { -1,
0, 0, 0, 9, 2, 3, 3, 4, 4, 5,
5, 6, 6, 7, 7, 1, 1, 8, 8, 8,
8,
};
short yylen[] = { 2,
0, 2, 2, 4, 3, 0, 2, 1, 3, 1,
3, 1, 2, 1, 2, 1, 2, 1, 1, 1,
3,
};
short yydefred[] = { 1,
0, 0, 19, 20, 0, 2, 0, 0, 0, 12,
0, 3, 0, 18, 0, 0, 0, 0, 0, 13,
16, 0, 0, 21, 0, 0, 5, 0, 17, 4,
};
short yydgoto[] = { 1,
22, 6, 18, 7, 8, 9, 10, 11, 12,
};
short yysindex[] = { 0,
-27, -49, 0, 0, -23, 0, -44, -84, -23, 0,
-243, 0, -23, 0, -39, -23, -23, -244, -23, 0,
0, -239, -53, 0, -104, -84, 0, -23, 0, 0,
};
short yyrindex[] = { 0,
0, -31, 0, 0, 0, 0, -227, -17, -20, 0,
-40, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, -36, 0, 0, -226, -16, 0, -19, 0, 0,
};
short yygindex[] = { 0,
0, 0, 0, 21, 18, 17, 1, 0, 0,
};
#define YYTABLESIZE 243
short yytable[] = { 14,
14, 24, 16, 15, 15, 30, 14, 19, 18, 20,
15, 13, 5, 21, 27, 18, 5, 29, 14, 17,
10, 11, 15, 8, 9, 15, 10, 11, 20, 8,
9, 6, 7, 23, 26, 28, 25, 0, 10, 11,
0, 8, 9, 0, 0, 0, 0, 0, 0, 0,
0, 14, 0, 0, 0, 15, 0, 0, 0, 0,
18, 0, 0, 0, 0, 0, 0, 0, 0, 0,
17, 10, 11, 0, 0, 0, 0, 0, 0, 17,
0, 0, 0, 14, 17, 0, 0, 15, 0, 0,
0, 0, 18, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 10, 11, 0, 8, 9, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 14, 14, 14,
14, 15, 15, 15, 15, 18, 18, 18, 18, 18,
2, 0, 3, 4, 14, 0, 3, 4, 10, 11,
0, 8, 9,
};
short yycheck[] = { 40,
41, 41, 47, 40, 41, 59, 47, 92, 40, 9,
47, 61, 40, 257, 259, 47, 40, 257, 59, 124,
41, 41, 59, 41, 41, 5, 47, 47, 28, 47,
47, 259, 259, 13, 17, 19, 16, -1, 59, 59,
-1, 59, 59, -1, -1, -1, -1, -1, -1, -1,
-1, 92, -1, -1, -1, 92, -1, -1, -1, -1,
92, -1, -1, -1, -1, -1, -1, -1, -1, -1,
124, 92, 92, -1, -1, -1, -1, -1, -1, 124,
-1, -1, -1, 124, 124, -1, -1, 124, -1, -1,
-1, -1, 124, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, 124, 124, -1, 124, 124, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, 258, 259, 260,
261, 258, 259, 260, 261, 257, 258, 259, 260, 261,
258, -1, 260, 261, 258, -1, 260, 261, 259, 259,
-1, 259, 259,
};
#define YYFINAL 1
#ifndef YYDEBUG
#define YYDEBUG 0
#endif
#define YYMAXTOKEN 261
#if YYDEBUG
char *yyname[] = {
"end-of-file",0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,"'('","')'",0,0,0,0,0,"'/'",0,0,0,0,0,0,0,0,0,0,0,"';'",0,"'='",0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,"'\\\\'",0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,"'|'",0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
"CLOSE","ID","CODE","RANGE","STRING",
};
char *yyrule[] = {
"$accept : spec",
"spec :",
"spec : spec rule",
"spec : spec decl",
"decl : ID '=' expr ';'",
"rule : expr look CODE",
"look :",
"look : '/' expr",
"expr : diff",
"expr : expr '|' diff",
"diff : term",
"diff : diff '\\\\' term",
"term : factor",
"term : term factor",
"factor : primary",
"factor : primary close",
"close : CLOSE",
"close : close CLOSE",
"primary : ID",
"primary : RANGE",
"primary : STRING",
"primary : '(' expr ')'",
};
#endif
#define yyclearin (yychar=(-1))
#define yyerrok (yyerrflag=0)
#ifdef YYSTACKSIZE
#ifndef YYMAXDEPTH
#define YYMAXDEPTH YYSTACKSIZE
#endif
#else
#ifdef YYMAXDEPTH
#define YYSTACKSIZE YYMAXDEPTH
#else
#define YYSTACKSIZE 500
#define YYMAXDEPTH 500
#endif
#endif
int yydebug;
int yynerrs;
int yyerrflag;
int yychar;
short *yyssp;
YYSTYPE *yyvsp;
YYSTYPE yyval;
YYSTYPE yylval;
short yyss[YYSTACKSIZE];
YYSTYPE yyvs[YYSTACKSIZE];
#define yystacksize YYSTACKSIZE
#line 119 "parser.y"
void yyerror(char* s){
in->fatal(s);
}
int yylex(){
return in->scan();
}
void parse(int i, ostream &o){
o << "/* Generated by re2c on ";
time_t now = time(&now);
o.write(ctime(&now), 24);
o << " */\n";
in = new Scanner(i);
o << "#line " << in->line() << " \"" << (fileName? fileName : "<stdin>") << "\"\n";
while(in->echo(o)){
yyparse();
if(spec)
genCode(o, spec);
o << "#line " << in->line() << "\n";
}
}
#line 212 "y.tab.c"
#define YYABORT goto yyabort
#define YYACCEPT goto yyaccept
#define YYERROR goto yyerrlab
int
yyparse()
{
register int yym, yyn, yystate;
#if YYDEBUG
register char *yys;
extern char *getenv();
if (yys = getenv("YYDEBUG"))
{
yyn = *yys;
if (yyn >= '0' && yyn <= '9')
yydebug = yyn - '0';
}
#endif
yynerrs = 0;
yyerrflag = 0;
yychar = (-1);
yyssp = yyss;
yyvsp = yyvs;
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