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ioq3quest/lcc/tst/yacc.c
Ludwig Nussel 5ae70d54b0 remove svn:executable property
2005-08-28 17:54:51 +00:00

591 lines
13 KiB
C
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# define ID 257
# define CON 258
# define UNARYMINUS 259
#define yyclearin yychar = -1
#define yyerrok yyerrflag = 0
extern int yychar;
extern short yyerrflag;
#ifndef YYMAXDEPTH
#define YYMAXDEPTH 150
#endif
#ifndef YYSTYPE
#define YYSTYPE int
#endif
YYSTYPE yylval, yyval;
# define YYERRCODE 256
#include <stdio.h>
# define U(x) x
# define NLSTATE yyprevious=YYNEWLINE
# define BEGIN yybgin = yysvec + 1 +
# define INITIAL 0
# define YYLERR yysvec
# define YYSTATE (yyestate-yysvec-1)
# define YYOPTIM 1
# define YYLMAX 200
# define output(c) (void)putc(c,yyout)
# define input() (((yytchar=yysptr>yysbuf?U(*--yysptr):getc(yyin))==10?(yylineno++,yytchar):yytchar)==EOF?0:yytchar)
# define unput(c) {yytchar= (c);if(yytchar=='\n')yylineno--;*yysptr++=yytchar;}
# define yymore() (yymorfg=1)
# define ECHO fprintf(yyout, "%s",yytext)
# define REJECT { nstr = yyreject(); goto yyfussy;}
int yyleng; extern char yytext[];
int yymorfg;
extern char *yysptr, yysbuf[];
int yytchar;
FILE *yyin ={stdin}, *yyout ={stdout};
extern int yylineno;
struct yysvf {
struct yywork *yystoff;
struct yysvf *yyother;
int *yystops;};
struct yysvf *yyestate;
extern struct yysvf yysvec[], *yybgin;
# define YYNEWLINE 10
yylex(){
int nstr; extern int yyprevious;
while((nstr = yylook()) >= 0)
yyfussy: switch(nstr){
case 0:
if(yywrap()) return(0); break;
case 1:
return ID;
break;
case 2:
return CON;
break;
case 3:
;
break;
case 4:
return yytext[0];
break;
case -1:
break;
default:
fprintf(yyout,"bad switch yylook %d",nstr);
} return(0); }
/* end of yylex */
int yyvstop[] ={
0,
4,
0,
3,
4,
0,
2,
4,
0,
1,
4,
0,
2,
0,
1,
0,
0};
# define YYTYPE char
struct yywork { YYTYPE verify, advance; } yycrank[] ={
0,0, 0,0, 1,3, 0,0,
0,0, 0,0, 0,0, 0,0,
0,0, 0,0, 1,4, 1,3,
0,0, 0,0, 0,0, 0,0,
0,0, 0,0, 0,0, 0,0,
0,0, 0,0, 0,0, 0,0,
0,0, 0,0, 0,0, 0,0,
0,0, 0,0, 0,0, 0,0,
0,0, 0,0, 0,0, 0,0,
0,0, 0,0, 0,0, 0,0,
0,0, 0,0, 0,0, 0,0,
0,0, 0,0, 0,0, 0,0,
0,0, 1,5, 5,7, 5,7,
5,7, 5,7, 5,7, 5,7,
5,7, 5,7, 5,7, 5,7,
0,0, 0,0, 0,0, 0,0,
0,0, 0,0, 1,6, 6,8,
6,8, 6,8, 6,8, 6,8,
6,8, 6,8, 6,8, 6,8,
6,8, 0,0, 0,0, 0,0,
0,0, 0,0, 0,0, 0,0,
6,8, 6,8, 6,8, 6,8,
6,8, 6,8, 6,8, 6,8,
6,8, 6,8, 6,8, 6,8,
6,8, 6,8, 6,8, 6,8,
6,8, 6,8, 6,8, 6,8,
6,8, 6,8, 6,8, 6,8,
6,8, 6,8, 0,0, 0,0,
0,0, 0,0, 6,8, 0,0,
6,8, 6,8, 6,8, 6,8,
6,8, 6,8, 6,8, 6,8,
6,8, 6,8, 6,8, 6,8,
6,8, 6,8, 6,8, 6,8,
6,8, 6,8, 6,8, 6,8,
6,8, 6,8, 6,8, 6,8,
6,8, 6,8, 0,0, 0,0,
0,0};
struct yysvf yysvec[] ={
0, 0, 0,
yycrank+-1, 0, 0,
yycrank+0, yysvec+1, 0,
yycrank+0, 0, yyvstop+1,
yycrank+0, 0, yyvstop+3,
yycrank+2, 0, yyvstop+6,
yycrank+19, 0, yyvstop+9,
yycrank+0, yysvec+5, yyvstop+12,
yycrank+0, yysvec+6, yyvstop+14,
0, 0, 0};
struct yywork *yytop = yycrank+141;
struct yysvf *yybgin = yysvec+1;
char yymatch[] ={
00 ,01 ,01 ,01 ,01 ,01 ,01 ,01 ,
01 ,011 ,012 ,01 ,01 ,01 ,01 ,01 ,
01 ,01 ,01 ,01 ,01 ,01 ,01 ,01 ,
01 ,01 ,01 ,01 ,01 ,01 ,01 ,01 ,
011 ,01 ,01 ,01 ,01 ,01 ,01 ,01 ,
01 ,01 ,01 ,01 ,01 ,01 ,01 ,01 ,
'0' ,'0' ,'0' ,'0' ,'0' ,'0' ,'0' ,'0' ,
'0' ,'0' ,01 ,01 ,01 ,01 ,01 ,01 ,
01 ,'A' ,'A' ,'A' ,'A' ,'A' ,'A' ,'A' ,
'A' ,'A' ,'A' ,'A' ,'A' ,'A' ,'A' ,'A' ,
'A' ,'A' ,'A' ,'A' ,'A' ,'A' ,'A' ,'A' ,
'A' ,'A' ,'A' ,01 ,01 ,01 ,01 ,'A' ,
01 ,'A' ,'A' ,'A' ,'A' ,'A' ,'A' ,'A' ,
'A' ,'A' ,'A' ,'A' ,'A' ,'A' ,'A' ,'A' ,
'A' ,'A' ,'A' ,'A' ,'A' ,'A' ,'A' ,'A' ,
'A' ,'A' ,'A' ,01 ,01 ,01 ,01 ,01 ,
0};
char yyextra[] ={
0,0,0,0,0,0,0,0,
0};
/* ncform 4.1 83/08/11 */
int yylineno =1;
# define YYU(x) x
# define NLSTATE yyprevious=YYNEWLINE
char yytext[YYLMAX];
struct yysvf *yylstate [YYLMAX], **yylsp, **yyolsp;
char yysbuf[YYLMAX];
char *yysptr = yysbuf;
int *yyfnd;
extern struct yysvf *yyestate;
int yyprevious = YYNEWLINE;
yylook(){
register struct yysvf *yystate, **lsp;
register struct yywork *yyt;
struct yysvf *yyz;
int yych;
struct yywork *yyr;
# ifdef LEXDEBUG
int debug;
# endif
char *yylastch;
/* start off machines */
# ifdef LEXDEBUG
debug = 0;
# endif
if (!yymorfg)
yylastch = yytext;
else {
yymorfg=0;
yylastch = yytext+yyleng;
}
for(;;){
lsp = yylstate;
yyestate = yystate = yybgin;
if (yyprevious==YYNEWLINE) yystate++;
for (;;){
# ifdef LEXDEBUG
if(debug)fprintf(yyout,"state %d\n",yystate-yysvec-1);
# endif
yyt = yystate->yystoff;
if(yyt == yycrank){ /* may not be any transitions */
yyz = yystate->yyother;
if(yyz == 0)break;
if(yyz->yystoff == yycrank)break;
}
*yylastch++ = yych = input();
tryagain:
# ifdef LEXDEBUG
if(debug){
fprintf(yyout,"char ");
allprint(yych);
putchar('\n');
}
# endif
yyr = yyt;
if ( yyt > yycrank){
yyt = yyr + yych;
if (yyt <= yytop && yyt->verify+yysvec == yystate){
if(yyt->advance+yysvec == YYLERR) /* error transitions */
{unput(*--yylastch);break;}
*lsp++ = yystate = yyt->advance+yysvec;
goto contin;
}
}
# ifdef YYOPTIM
else if(yyt < yycrank) { /* r < yycrank */
yyt = yyr = yycrank+(yycrank-yyt);
# ifdef LEXDEBUG
if(debug)fprintf(yyout,"compressed state\n");
# endif
yyt = yyt + yych;
if(yyt <= yytop && yyt->verify+yysvec == yystate){
if(yyt->advance+yysvec == YYLERR) /* error transitions */
{unput(*--yylastch);break;}
*lsp++ = yystate = yyt->advance+yysvec;
goto contin;
}
yyt = yyr + YYU(yymatch[yych]);
# ifdef LEXDEBUG
if(debug){
fprintf(yyout,"try fall back character ");
allprint(YYU(yymatch[yych]));
putchar('\n');
}
# endif
if(yyt <= yytop && yyt->verify+yysvec == yystate){
if(yyt->advance+yysvec == YYLERR) /* error transition */
{unput(*--yylastch);break;}
*lsp++ = yystate = yyt->advance+yysvec;
goto contin;
}
}
if ((yystate = yystate->yyother) && (yyt= yystate->yystoff) != yycrank){
# ifdef LEXDEBUG
if(debug)fprintf(yyout,"fall back to state %d\n",yystate-yysvec-1);
# endif
goto tryagain;
}
# endif
else
{unput(*--yylastch);break;}
contin:
# ifdef LEXDEBUG
if(debug){
fprintf(yyout,"state %d char ",yystate-yysvec-1);
allprint(yych);
putchar('\n');
}
# endif
;
}
# ifdef LEXDEBUG
if(debug){
fprintf(yyout,"stopped at %d with ",*(lsp-1)-yysvec-1);
allprint(yych);
putchar('\n');
}
# endif
while (lsp-- > yylstate){
*yylastch-- = 0;
if (*lsp != 0 && (yyfnd= (*lsp)->yystops) && *yyfnd > 0){
yyolsp = lsp;
if(yyextra[*yyfnd]){ /* must backup */
while(yyback((*lsp)->yystops,-*yyfnd) != 1 && lsp > yylstate){
lsp--;
unput(*yylastch--);
}
}
yyprevious = YYU(*yylastch);
yylsp = lsp;
yyleng = yylastch-yytext+1;
yytext[yyleng] = 0;
# ifdef LEXDEBUG
if(debug){
fprintf(yyout,"\nmatch ");
sprint(yytext);
fprintf(yyout," action %d\n",*yyfnd);
}
# endif
return(*yyfnd++);
}
unput(*yylastch);
}
if (yytext[0] == 0 /* && feof(yyin) */)
{
yysptr=yysbuf;
return(0);
}
yyprevious = yytext[0] = input();
if (yyprevious>0)
output(yyprevious);
yylastch=yytext;
# ifdef LEXDEBUG
if(debug)putchar('\n');
# endif
}
}
yyback(p, m)
int *p;
{
if (p==0) return(0);
while (*p)
{
if (*p++ == m)
return(1);
}
return(0);
}
/* the following are only used in the lex library */
yyinput(){
return(input());
}
yyoutput(c)
int c; {
output(c);
}
yyunput(c)
int c; {
unput(c);
}
main() {
yyparse();
return 0;
}
/* yyerror - issue error message */
yyerror(s) char *s; {
printf("%s\n", s);
}
short yyexca[] ={
-1, 1,
0, -1,
-2, 0,
};
# define YYNPROD 15
# define YYLAST 249
short yyact[]={
12, 2, 9, 8, 17, 11, 25, 17, 15, 18,
16, 10, 18, 17, 15, 7, 16, 13, 18, 5,
3, 1, 0, 19, 20, 0, 0, 21, 22, 23,
24, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 6, 14, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 4, 6 };
short yypact[]={
-1000, -9,-1000, 5, -7, -59,-1000,-1000,-1000, -40,
-29, -40, -40,-1000,-1000, -40, -40, -40, -40, -38,
-35, -38, -38,-1000,-1000,-1000 };
short yypgo[]={
0, 21, 20, 17, 11 };
short yyr1[]={
0, 1, 1, 1, 1, 2, 4, 4, 4, 4,
4, 4, 4, 4, 3 };
short yyr2[]={
0, 0, 2, 3, 3, 3, 3, 3, 3, 3,
2, 3, 1, 1, 1 };
short yychk[]={
-1000, -1, 10, -2, 256, -3, 257, 10, 10, 61,
-4, 45, 40, -3, 258, 43, 45, 42, 47, -4,
-4, -4, -4, -4, -4, 41 };
short yydef[]={
1, -2, 2, 0, 0, 0, 14, 3, 4, 0,
5, 0, 0, 12, 13, 0, 0, 0, 0, 10,
0, 6, 7, 8, 9, 11 };
#ifndef lint
#endif
# define YYFLAG -1000
# define YYERROR goto yyerrlab
# define YYACCEPT return(0)
# define YYABORT return(1)
/* parser for yacc output */
#ifdef YYDEBUG
int yydebug = 0; /* 1 for debugging */
#endif
YYSTYPE yyv[YYMAXDEPTH]; /* where the values are stored */
int yychar = -1; /* current input token number */
int yynerrs = 0; /* number of errors */
short yyerrflag = 0; /* error recovery flag */
yyparse() {
short yys[YYMAXDEPTH];
short yyj, yym;
register YYSTYPE *yypvt;
register short yystate, *yyps, yyn;
register YYSTYPE *yypv;
register short *yyxi;
yystate = 0;
yychar = -1;
yynerrs = 0;
yyerrflag = 0;
yyps= &yys[-1];
yypv= &yyv[-1];
yystack: /* put a state and value onto the stack */
#ifdef YYDEBUG
if( yydebug ) printf( "state %d, char 0%o\n", yystate, yychar );
#endif
if( ++yyps> &yys[YYMAXDEPTH] ) { yyerror( "yacc stack overflow" ); return(1); }
*yyps = yystate;
++yypv;
*yypv = yyval;
yynewstate:
yyn = yypact[yystate];
if( yyn<= YYFLAG ) goto yydefault; /* simple state */
if( yychar<0 ) if( (yychar=yylex())<0 ) yychar=0;
if( (yyn += yychar)<0 || yyn >= YYLAST ) goto yydefault;
if( yychk[ yyn=yyact[ yyn ] ] == yychar ){ /* valid shift */
yychar = -1;
yyval = yylval;
yystate = yyn;
if( yyerrflag > 0 ) --yyerrflag;
goto yystack;
}
yydefault:
/* default state action */
if( (yyn=yydef[yystate]) == -2 ) {
if( yychar<0 ) if( (yychar=yylex())<0 ) yychar = 0;
/* look through exception table */
for( yyxi=yyexca; (*yyxi!= (-1)) || (yyxi[1]!=yystate) ; yyxi += 2 ) ; /* VOID */
while( *(yyxi+=2) >= 0 ){
if( *yyxi == yychar ) break;
}
if( (yyn = yyxi[1]) < 0 ) return(0); /* accept */
}
if( yyn == 0 ){ /* error */
/* error ... attempt to resume parsing */
switch( yyerrflag ){
case 0: /* brand new error */
yyerror( "syntax error" );
yyerrlab:
++yynerrs;
case 1:
case 2: /* incompletely recovered error ... try again */
yyerrflag = 3;
/* find a state where "error" is a legal shift action */
while ( yyps >= yys ) {
yyn = yypact[*yyps] + YYERRCODE;
if( yyn>= 0 && yyn < YYLAST && yychk[yyact[yyn]] == YYERRCODE ){
yystate = yyact[yyn]; /* simulate a shift of "error" */
goto yystack;
}
yyn = yypact[*yyps];
/* the current yyps has no shift onn "error", pop stack */
#ifdef YYDEBUG
if( yydebug ) printf( "error recovery pops state %d, uncovers %d\n", *yyps, yyps[-1] );
#endif
--yyps;
--yypv;
}
/* there is no state on the stack with an error shift ... abort */
yyabort:
return(1);
case 3: /* no shift yet; clobber input char */
#ifdef YYDEBUG
if( yydebug ) printf( "error recovery discards char %d\n", yychar );
#endif
if( yychar == 0 ) goto yyabort; /* don't discard EOF, quit */
yychar = -1;
goto yynewstate; /* try again in the same state */
}
}
/* reduction by production yyn */
#ifdef YYDEBUG
if( yydebug ) printf("reduce %d\n",yyn);
#endif
yyps -= yyr2[yyn];
yypvt = yypv;
yypv -= yyr2[yyn];
yyval = yypv[1];
yym=yyn;
/* consult goto table to find next state */
yyn = yyr1[yyn];
yyj = yypgo[yyn] + *yyps + 1;
if( yyj>=YYLAST || yychk[ yystate = yyact[yyj] ] != -yyn ) yystate = yyact[yypgo[yyn]];
switch(yym){
case 4:
{ yyerrok; } break;
case 5:
{ printf("store\n"); } break;
case 6:
{ printf("add\n"); } break;
case 7:
{ printf("negate\nadd\n"); } break;
case 8:
{ printf("multiply\n"); } break;
case 9:
{ printf("divide\n"); } break;
case 10:
{ printf("negate\n"); } break;
case 12:
{ printf("load\n"); } break;
case 13:
{ printf("push %s\n", yytext); } break;
case 14:
{ printf("%s\n", yytext); } break;
}
goto yystack; /* stack new state and value */
}
int yywrap() { return 1; }
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