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freebsd-dev/contrib/byacc/yaccpar.c
Dag-Erling Smørgrav 8e022d3cde byacc: Update to 20230201. 
Note that this enables the backtracking extension, which we had previously left disabled.

PR:		244149, 269425
Sponsored by:	Klara, Inc.
Differential Revision:	https://reviews.freebsd.org/D38421
2023-02-20 23:35:32 +01:00

432 lines
12 KiB
C
Raw Blame History

/* This file generated automatically using
* @Id: skel2c,v 1.4 2016/06/07 00:26:09 tom Exp @
*/
/* @Id: yaccpar.skel,v 1.11 2021/06/19 20:45:25 tom Exp @ */
#include "defs.h"
/* If the skeleton is changed, the banner should be changed so that */
/* the altered version can be easily distinguished from the original. */
/* */
/* The #defines included with the banner are there because they are */
/* useful in subsequent code. The macros #defined in the header or */
/* the body either are not useful outside of semantic actions or */
/* are conditional. */
const char *const banner[] =
{
"/* original parser id follows */",
"/* yysccsid[] = \"@(#)yaccpar 1.9 (Berkeley) 02/21/93\" */",
"/* (use YYMAJOR/YYMINOR for ifdefs dependent on parser version) */",
"",
"#define YYBYACC 1",
CONCAT1("#define YYMAJOR ", YYMAJOR),
CONCAT1("#define YYMINOR ", YYMINOR),
#ifdef YYPATCH
CONCAT1("#define YYPATCH ", YYPATCH),
#endif
"",
"#define YYEMPTY (-1)",
"#define yyclearin (yychar = YYEMPTY)",
"#define yyerrok (yyerrflag = 0)",
"#define YYRECOVERING() (yyerrflag != 0)",
"#define YYENOMEM (-2)",
"#define YYEOF 0",
0
};
const char *const xdecls[] =
{
"",
"extern int YYPARSE_DECL();",
0
};
const char *const tables[] =
{
"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 || defined(yytname)",
"extern char *yyname[];",
"#endif",
"#if YYDEBUG",
"extern char *yyrule[];",
"#endif",
0
};
const char *const global_vars[] =
{
"",
"#if YYDEBUG",
"int yydebug;",
"#endif",
0
};
const char *const impure_vars[] =
{
"",
"int yyerrflag;",
"int yychar;",
"YYSTYPE yyval;",
"YYSTYPE yylval;",
"int yynerrs;",
0
};
const char *const hdr_defs[] =
{
"",
"/* 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;",
0
};
const char *const hdr_vars[] =
{
"/* variables for the parser stack */",
"static YYSTACKDATA yystack;",
0
};
const char *const body_vars[] =
{
" int yyerrflag;",
" int yychar;",
" YYSTYPE yyval;",
" YYSTYPE yylval;",
" int yynerrs;",
"",
" /* variables for the parser stack */",
" YYSTACKDATA yystack;",
0
};
const char *const body_1[] =
{
"",
"#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 == NULL)",
" return YYENOMEM;",
"",
" data->s_base = newss;",
" data->s_mark = newss + i;",
"",
" newvs = (YYSTYPE *)realloc(data->l_base, newsize * sizeof(*newvs));",
" if (newvs == NULL)",
" 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()",
"{",
0
};
const char *const body_2[] =
{
" int yym, yyn, yystate;",
"#if YYDEBUG",
" const char *yys;",
"",
" if ((yys = getenv(\"YYDEBUG\")) != NULL)",
" {",
" yyn = *yys;",
" if (yyn >= '0' && yyn <= '9')",
" yydebug = yyn - '0';",
" }",
"#endif",
"",
0
};
const char *const init_vars[] =
{
" memset(&yyval, 0, sizeof(yyval));",
" memset(&yylval, 0, sizeof(yylval));",
"",
0
};
const char *const body_3[] =
{
" /* yym is set below */",
" /* yyn is set below */",
" 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)",
" {",
" yychar = YYLEX;",
" if (yychar < 0) yychar = YYEOF;",
"#if YYDEBUG",
" if (yydebug)",
" {",
" if ((yys = yyname[YYTRANSLATE(yychar)]) == NULL) yys = yyname[YYUNDFTOKEN];",
" printf(\"%sdebug: state %d, reading %d (%s)\\n\",",
" YYPREFIX, yystate, yychar, yys);",
" }",
"#endif",
" }",
" if (((yyn = yysindex[yystate]) != 0) && (yyn += yychar) >= 0 &&",
" yyn <= YYTABLESIZE && yycheck[yyn] == (YYINT) 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]) != 0) && (yyn += yychar) >= 0 &&",
" yyn <= YYTABLESIZE && yycheck[yyn] == (YYINT) yychar)",
" {",
" yyn = yytable[yyn];",
" goto yyreduce;",
" }",
" if (yyerrflag != 0) goto yyinrecovery;",
"",
" YYERROR_CALL(\"syntax error\");",
"",
" goto yyerrlab; /* redundant goto avoids 'unused label' warning */",
"yyerrlab:",
" ++yynerrs;",
"",
"yyinrecovery:",
" if (yyerrflag < 3)",
" {",
" yyerrflag = 3;",
" for (;;)",
" {",
" if (((yyn = yysindex[*yystack.s_mark]) != 0) && (yyn += YYERRCODE) >= 0 &&",
" yyn <= YYTABLESIZE && yycheck[yyn] == (YYINT) 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)",
" {",
" if ((yys = yyname[YYTRANSLATE(yychar)]) == NULL) yys = yyname[YYUNDFTOKEN];",
" 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 > 0)",
" yyval = yystack.l_mark[1-yym];",
" else",
" memset(&yyval, 0, sizeof yyval);",
"",
" switch (yyn)",
" {",
0
};
const char *const trailer[] =
{
" }",
" 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)",
" {",
" yychar = YYLEX;",
" if (yychar < 0) yychar = YYEOF;",
"#if YYDEBUG",
" if (yydebug)",
" {",
" if ((yys = yyname[YYTRANSLATE(yychar)]) == NULL) yys = yyname[YYUNDFTOKEN];",
" printf(\"%sdebug: state %d, reading %d (%s)\\n\",",
" YYPREFIX, YYFINAL, yychar, yys);",
" }",
"#endif",
" }",
" if (yychar == YYEOF) goto yyaccept;",
" goto yyloop;",
" }",
" if (((yyn = yygindex[yym]) != 0) && (yyn += yystate) >= 0 &&",
" yyn <= YYTABLESIZE && yycheck[yyn] == (YYINT) 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);",
"}",
0
};
void
write_section(FILE * fp, const char *const section[])
{
int i;
const char *s;
for (i = 0; (s = section[i]) != 0; ++i)
{
if (fp == code_file)
++outline;
fprintf(fp, "%s\n", s);
}
}
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