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freebsd-skq/contrib/byacc/test/yacc/code_calc.code.c
bapt 380a6c91bc Update to byacc 20140409 
Among all the modifications, this new byacc also solves a 14 year old bug [1]

PR:		bin/23254 [1]
Submitted by:	marka@nominum.com [1]
MFC after:	3 weeks
2014-04-23 05:57:45 +00:00

580 lines
12 KiB
C
Raw Blame History

/* original parser id follows */
/* yysccsid[] = "@(#)yaccpar 1.9 (Berkeley) 02/21/93" */
/* (use YYMAJOR/YYMINOR for ifdefs dependent on parser version) */
#define YYBYACC 1
#define YYMAJOR 1
#define YYMINOR 9
#define YYCHECK "yyyymmdd"
#define YYEMPTY (-1)
#define yyclearin (yychar = YYEMPTY)
#define yyerrok (yyerrflag = 0)
#define YYRECOVERING() (yyerrflag != 0)
#define YYENOMEM (-2)
#define YYEOF 0
#ifndef yyparse
#define yyparse calc_parse
#endif /* yyparse */
#ifndef yylex
#define yylex calc_lex
#endif /* yylex */
#ifndef yyerror
#define yyerror calc_error
#endif /* yyerror */
#ifndef yychar
#define yychar calc_char
#endif /* yychar */
#ifndef yyval
#define yyval calc_val
#endif /* yyval */
#ifndef yylval
#define yylval calc_lval
#endif /* yylval */
#ifndef yydebug
#define yydebug calc_debug
#endif /* yydebug */
#ifndef yynerrs
#define yynerrs calc_nerrs
#endif /* yynerrs */
#ifndef yyerrflag
#define yyerrflag calc_errflag
#endif /* yyerrflag */
#ifndef yylhs
#define yylhs calc_lhs
#endif /* yylhs */
#ifndef yylen
#define yylen calc_len
#endif /* yylen */
#ifndef yydefred
#define yydefred calc_defred
#endif /* yydefred */
#ifndef yydgoto
#define yydgoto calc_dgoto
#endif /* yydgoto */
#ifndef yysindex
#define yysindex calc_sindex
#endif /* yysindex */
#ifndef yyrindex
#define yyrindex calc_rindex
#endif /* yyrindex */
#ifndef yygindex
#define yygindex calc_gindex
#endif /* yygindex */
#ifndef yytable
#define yytable calc_table
#endif /* yytable */
#ifndef yycheck
#define yycheck calc_check
#endif /* yycheck */
#ifndef yyname
#define yyname calc_name
#endif /* yyname */
#ifndef yyrule
#define yyrule calc_rule
#endif /* yyrule */
#define YYPREFIX "calc_"
#define YYPURE 0
#line 2 "code_calc.y"
# include <stdio.h>
# include <ctype.h>
int regs[26];
int base;
#ifdef YYBISON
int yylex(void);
static void yyerror(const char *s);
#endif
#line 113 "code_calc.code.c"
#if ! defined(YYSTYPE) && ! defined(YYSTYPE_IS_DECLARED)
/* Default: YYSTYPE is the semantic value type. */
typedef int YYSTYPE;
# define YYSTYPE_IS_DECLARED 1
#endif
/* compatibility with bison */
#ifdef YYPARSE_PARAM
/* compatibility with FreeBSD */
# ifdef YYPARSE_PARAM_TYPE
# define YYPARSE_DECL() yyparse(YYPARSE_PARAM_TYPE YYPARSE_PARAM)
# else
# define YYPARSE_DECL() yyparse(void *YYPARSE_PARAM)
# endif
#else
# define YYPARSE_DECL() yyparse(void)
#endif
/* Parameters sent to lex. */
#ifdef YYLEX_PARAM
# define YYLEX_DECL() yylex(void *YYLEX_PARAM)
# define YYLEX yylex(YYLEX_PARAM)
#else
# define YYLEX_DECL() yylex(void)
# define YYLEX yylex()
#endif
/* Parameters sent to yyerror. */
#ifndef YYERROR_DECL
#define YYERROR_DECL() yyerror(const char *s)
#endif
#ifndef YYERROR_CALL
#define YYERROR_CALL(msg) yyerror(msg)
#endif
#define DIGIT 257
#define LETTER 258
#define UMINUS 259
#define YYERRCODE 256
#define YYTABLESIZE 220
#define YYFINAL 1
#ifndef YYDEBUG
#define YYDEBUG 0
#endif
#define YYMAXTOKEN 259
#define YYUNDFTOKEN 265
#define YYTRANSLATE(a) ((a) > YYMAXTOKEN ? YYUNDFTOKEN : (a))
extern int YYPARSE_DECL();
typedef short YYINT;
extern YYINT yylhs[];
extern YYINT yylen[];
extern YYINT yydefred[];
extern YYINT yydgoto[];
extern YYINT yysindex[];
extern YYINT yyrindex[];
extern YYINT yygindex[];
extern YYINT yytable[];
extern YYINT yycheck[];
#if YYDEBUG
extern char *yyname[];
extern char *yyrule[];
#endif
int yydebug;
int yynerrs;
int yyerrflag;
int yychar;
YYSTYPE yyval;
YYSTYPE yylval;
/* define the initial stack-sizes */
#ifdef YYSTACKSIZE
#undef YYMAXDEPTH
#define YYMAXDEPTH YYSTACKSIZE
#else
#ifdef YYMAXDEPTH
#define YYSTACKSIZE YYMAXDEPTH
#else
#define YYSTACKSIZE 10000
#define YYMAXDEPTH 10000
#endif
#endif
#define YYINITSTACKSIZE 200
typedef struct {
unsigned stacksize;
YYINT *s_base;
YYINT *s_mark;
YYINT *s_last;
YYSTYPE *l_base;
YYSTYPE *l_mark;
} YYSTACKDATA;
/* variables for the parser stack */
static YYSTACKDATA yystack;
#line 68 "code_calc.y"
/* start of programs */
#ifdef YYBYACC
extern int YYLEX_DECL();
#endif
int
main (void)
{
while(!feof(stdin)) {
yyparse();
}
return 0;
}
static void
yyerror(const char *s)
{
fprintf(stderr, "%s\n", s);
}
int
yylex(void)
{
/* lexical analysis routine */
/* returns LETTER for a lower case letter, yylval = 0 through 25 */
/* return DIGIT for a digit, yylval = 0 through 9 */
/* all other characters are returned immediately */
int c;
while( (c=getchar()) == ' ' ) { /* skip blanks */ }
/* c is now nonblank */
if( islower( c )) {
yylval = c - 'a';
return ( LETTER );
}
if( isdigit( c )) {
yylval = c - '0';
return ( DIGIT );
}
return( c );
}
#line 259 "code_calc.code.c"
#if YYDEBUG
#include <stdio.h> /* needed for printf */
#endif
#include <stdlib.h> /* needed for malloc, etc */
#include <string.h> /* needed for memset */
/* allocate initial stack or double stack size, up to YYMAXDEPTH */
static int yygrowstack(YYSTACKDATA *data)
{
int i;
unsigned newsize;
YYINT *newss;
YYSTYPE *newvs;
if ((newsize = data->stacksize) == 0)
newsize = YYINITSTACKSIZE;
else if (newsize >= YYMAXDEPTH)
return YYENOMEM;
else if ((newsize *= 2) > YYMAXDEPTH)
newsize = YYMAXDEPTH;
i = (int) (data->s_mark - data->s_base);
newss = (YYINT *)realloc(data->s_base, newsize * sizeof(*newss));
if (newss == 0)
return YYENOMEM;
data->s_base = newss;
data->s_mark = newss + i;
newvs = (YYSTYPE *)realloc(data->l_base, newsize * sizeof(*newvs));
if (newvs == 0)
return YYENOMEM;
data->l_base = newvs;
data->l_mark = newvs + i;
data->stacksize = newsize;
data->s_last = data->s_base + newsize - 1;
return 0;
}
#if YYPURE || defined(YY_NO_LEAKS)
static void yyfreestack(YYSTACKDATA *data)
{
free(data->s_base);
free(data->l_base);
memset(data, 0, sizeof(*data));
}
#else
#define yyfreestack(data) /* nothing */
#endif
#define YYABORT goto yyabort
#define YYREJECT goto yyabort
#define YYACCEPT goto yyaccept
#define YYERROR goto yyerrlab
int
YYPARSE_DECL()
{
int yym, yyn, yystate;
#if YYDEBUG
const char *yys;
if ((yys = getenv("YYDEBUG")) != 0)
{
yyn = *yys;
if (yyn >= '0' && yyn <= '9')
yydebug = yyn - '0';
}
#endif
yynerrs = 0;
yyerrflag = 0;
yychar = YYEMPTY;
yystate = 0;
#if YYPURE
memset(&yystack, 0, sizeof(yystack));
#endif
if (yystack.s_base == NULL && yygrowstack(&yystack) == YYENOMEM) goto yyoverflow;
yystack.s_mark = yystack.s_base;
yystack.l_mark = yystack.l_base;
yystate = 0;
*yystack.s_mark = 0;
yyloop:
if ((yyn = yydefred[yystate]) != 0) goto yyreduce;
if (yychar < 0)
{
if ((yychar = YYLEX) < 0) yychar = YYEOF;
#if YYDEBUG
if (yydebug)
{
yys = yyname[YYTRANSLATE(yychar)];
printf("%sdebug: state %d, reading %d (%s)\n",
YYPREFIX, yystate, yychar, yys);
}
#endif
}
if ((yyn = yysindex[yystate]) && (yyn += yychar) >= 0 &&
yyn <= YYTABLESIZE && yycheck[yyn] == yychar)
{
#if YYDEBUG
if (yydebug)
printf("%sdebug: state %d, shifting to state %d\n",
YYPREFIX, yystate, yytable[yyn]);
#endif
if (yystack.s_mark >= yystack.s_last && yygrowstack(&yystack) == YYENOMEM)
{
goto yyoverflow;
}
yystate = yytable[yyn];
*++yystack.s_mark = yytable[yyn];
*++yystack.l_mark = yylval;
yychar = YYEMPTY;
if (yyerrflag > 0) --yyerrflag;
goto yyloop;
}
if ((yyn = yyrindex[yystate]) && (yyn += yychar) >= 0 &&
yyn <= YYTABLESIZE && yycheck[yyn] == yychar)
{
yyn = yytable[yyn];
goto yyreduce;
}
if (yyerrflag) goto yyinrecovery;
YYERROR_CALL("syntax error");
goto yyerrlab;
yyerrlab:
++yynerrs;
yyinrecovery:
if (yyerrflag < 3)
{
yyerrflag = 3;
for (;;)
{
if ((yyn = yysindex[*yystack.s_mark]) && (yyn += YYERRCODE) >= 0 &&
yyn <= YYTABLESIZE && yycheck[yyn] == YYERRCODE)
{
#if YYDEBUG
if (yydebug)
printf("%sdebug: state %d, error recovery shifting\
to state %d\n", YYPREFIX, *yystack.s_mark, yytable[yyn]);
#endif
if (yystack.s_mark >= yystack.s_last && yygrowstack(&yystack) == YYENOMEM)
{
goto yyoverflow;
}
yystate = yytable[yyn];
*++yystack.s_mark = yytable[yyn];
*++yystack.l_mark = yylval;
goto yyloop;
}
else
{
#if YYDEBUG
if (yydebug)
printf("%sdebug: error recovery discarding state %d\n",
YYPREFIX, *yystack.s_mark);
#endif
if (yystack.s_mark <= yystack.s_base) goto yyabort;
--yystack.s_mark;
--yystack.l_mark;
}
}
}
else
{
if (yychar == YYEOF) goto yyabort;
#if YYDEBUG
if (yydebug)
{
yys = yyname[YYTRANSLATE(yychar)];
printf("%sdebug: state %d, error recovery discards token %d (%s)\n",
YYPREFIX, yystate, yychar, yys);
}
#endif
yychar = YYEMPTY;
goto yyloop;
}
yyreduce:
#if YYDEBUG
if (yydebug)
printf("%sdebug: state %d, reducing by rule %d (%s)\n",
YYPREFIX, yystate, yyn, yyrule[yyn]);
#endif
yym = yylen[yyn];
if (yym)
yyval = yystack.l_mark[1-yym];
else
memset(&yyval, 0, sizeof yyval);
switch (yyn)
{
case 3:
#line 30 "code_calc.y"
{ yyerrok ; }
break;
case 4:
#line 34 "code_calc.y"
{ printf("%d\n",yystack.l_mark[0]);}
break;
case 5:
#line 36 "code_calc.y"
{ regs[yystack.l_mark[-2]] = yystack.l_mark[0]; }
break;
case 6:
#line 40 "code_calc.y"
{ yyval = yystack.l_mark[-1]; }
break;
case 7:
#line 42 "code_calc.y"
{ yyval = yystack.l_mark[-2] + yystack.l_mark[0]; }
break;
case 8:
#line 44 "code_calc.y"
{ yyval = yystack.l_mark[-2] - yystack.l_mark[0]; }
break;
case 9:
#line 46 "code_calc.y"
{ yyval = yystack.l_mark[-2] * yystack.l_mark[0]; }
break;
case 10:
#line 48 "code_calc.y"
{ yyval = yystack.l_mark[-2] / yystack.l_mark[0]; }
break;
case 11:
#line 50 "code_calc.y"
{ yyval = yystack.l_mark[-2] % yystack.l_mark[0]; }
break;
case 12:
#line 52 "code_calc.y"
{ yyval = yystack.l_mark[-2] & yystack.l_mark[0]; }
break;
case 13:
#line 54 "code_calc.y"
{ yyval = yystack.l_mark[-2] | yystack.l_mark[0]; }
break;
case 14:
#line 56 "code_calc.y"
{ yyval = - yystack.l_mark[0]; }
break;
case 15:
#line 58 "code_calc.y"
{ yyval = regs[yystack.l_mark[0]]; }
break;
case 17:
#line 63 "code_calc.y"
{ yyval = yystack.l_mark[0]; base = (yystack.l_mark[0]==0) ? 8 : 10; }
break;
case 18:
#line 65 "code_calc.y"
{ yyval = base * yystack.l_mark[-1] + yystack.l_mark[0]; }
break;
#line 521 "code_calc.code.c"
}
yystack.s_mark -= yym;
yystate = *yystack.s_mark;
yystack.l_mark -= yym;
yym = yylhs[yyn];
if (yystate == 0 && yym == 0)
{
#if YYDEBUG
if (yydebug)
printf("%sdebug: after reduction, shifting from state 0 to\
state %d\n", YYPREFIX, YYFINAL);
#endif
yystate = YYFINAL;
*++yystack.s_mark = YYFINAL;
*++yystack.l_mark = yyval;
if (yychar < 0)
{
if ((yychar = YYLEX) < 0) yychar = YYEOF;
#if YYDEBUG
if (yydebug)
{
yys = yyname[YYTRANSLATE(yychar)];
printf("%sdebug: state %d, reading %d (%s)\n",
YYPREFIX, YYFINAL, yychar, yys);
}
#endif
}
if (yychar == YYEOF) goto yyaccept;
goto yyloop;
}
if ((yyn = yygindex[yym]) && (yyn += yystate) >= 0 &&
yyn <= YYTABLESIZE && yycheck[yyn] == yystate)
yystate = yytable[yyn];
else
yystate = yydgoto[yym];
#if YYDEBUG
if (yydebug)
printf("%sdebug: after reduction, shifting from state %d \
to state %d\n", YYPREFIX, *yystack.s_mark, yystate);
#endif
if (yystack.s_mark >= yystack.s_last && yygrowstack(&yystack) == YYENOMEM)
{
goto yyoverflow;
}
*++yystack.s_mark = (YYINT) yystate;
*++yystack.l_mark = yyval;
goto yyloop;
yyoverflow:
YYERROR_CALL("yacc stack overflow");
yyabort:
yyfreestack(&yystack);
return (1);
yyaccept:
yyfreestack(&yystack);
return (0);
}
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