minix/external/bsd/byacc/dist/skeleton.c

/*	$NetBSD: skeleton.c,v 1.13 2013/09/13 18:53:29 joerg Exp $	*/

/* Id: skeleton.c,v 1.32 2013/03/04 23:19:39 tom Exp  */

#include "defs.h"

#include <sys/cdefs.h>
__RCSID("$NetBSD: skeleton.c,v 1.13 2013/09/13 18:53:29 joerg Exp $");

/*  The definition of yysccsid in the banner should be replaced with	*/
/*  a #pragma ident directive if the target C compiler supports		*/
/*  #pragma ident directives.						*/
/*									*/
/*  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[] =
{
    "#ifndef lint",
    "#if __GNUC__ - 0 >= 4 || (__GNUC__ - 0 == 3 && __GNUC_MINOR__ >= 1)",
    "__attribute__((__used__))",
    "#endif",
    "static const char yysccsid[] = \"@(#)yaccpar	1.9 (Berkeley) 02/21/93\";",
    "#endif",
    "",
    "#ifdef _LIBC",
    "#include \"namespace.h\"",
    "#endif",
    "#include <stdlib.h>",
    "#include <string.h>",
    "",
    "#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)",
    "",
    0
};

const char *const xdecls[] =
{
    "",
    "extern int YYPARSE_DECL();",
#ifdef notdef
    "extern int YYLEX_DECL();",
#endif
    "",
    0
};

const char *const tables[] =
{
    "extern short yylhs[];",
    "extern short yylen[];",
    "extern short yydefred[];",
    "extern short yydgoto[];",
    "extern short yysindex[];",
    "extern short yyrindex[];",
    "extern short yygindex[];",
    "extern short yytable[];",
    "extern short yycheck[];",
    "",
    "#if YYDEBUG",
    "extern char *yyname[];",
    "extern char *yyrule[];",
    "#endif",
    0
};

const char *const global_vars[] =
{
    "",
    "int      yydebug;",
    "int      yynerrs;",
    0
};

const char *const impure_vars[] =
{
    "",
    "int      yyerrflag;",
    "int      yychar;",
    "YYSTYPE  yyval;",
    "YYSTYPE  yylval;",
    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 500",
    "#define YYMAXDEPTH  500",
    "#endif",
    "#endif",
    "",
    "#define YYINITSTACKSIZE 500",
    "",
    "typedef struct {",
    "    unsigned stacksize;",
    "    short    *s_base;",
    "    short    *s_mark;",
    "    short    *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;",
    "",
    "    /* 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;",
    "    short *newss;",
    "    YYSTYPE *newvs;",
    "",
    "    if ((newsize = data->stacksize) == 0)",
    "        newsize = YYINITSTACKSIZE;",
    "    else if (newsize >= YYMAXDEPTH)",
    "        return -1;",
    "    else if ((newsize *= 2) > YYMAXDEPTH)",
    "        newsize = YYMAXDEPTH;",
    "",
    "    i = (int) (data->s_mark - data->s_base);",
    "    newss = (short *)realloc(data->s_base, newsize * sizeof(*newss));",
    "    if (newss == 0)",
    "        return -1;",
    "",
    "    data->s_base = newss;",
    "    data->s_mark = newss + i;",
    "",
    "    newvs = (YYSTYPE *)realloc(data->l_base, newsize * sizeof(*newvs));",
    "    if (newvs == 0)",
    "        return -1;",
    "",
    "    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\")) != 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)) 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 = 0;",
    "#if YYDEBUG",
    "        if (yydebug)",
    "        {",
    "            yys = 0;",
    "            if (yychar <= YYMAXTOKEN) yys = yyname[yychar];",
    "            if (!yys) yys = \"illegal-symbol\";",
    "            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))",
    "        {",
    "            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;",
    "",
    0
};

const char *const body_3[] =
{
    "",
    "    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))",
    "                {",
    "                    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 == 0) goto yyabort;",
    "#if YYDEBUG",
    "        if (yydebug)",
    "        {",
    "            yys = 0;",
    "            if (yychar <= YYMAXTOKEN) yys = yyname[yychar];",
    "            if (!yys) yys = \"illegal-symbol\";",
    "            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)",
    "    {",
    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)",
    "        {",
    "            if ((yychar = YYLEX) < 0) yychar = 0;",
    "#if YYDEBUG",
    "            if (yydebug)",
    "            {",
    "                yys = 0;",
    "                if (yychar <= YYMAXTOKEN) yys = yyname[yychar];",
    "                if (!yys) yys = \"illegal-symbol\";",
    "                printf(\"%sdebug: state %d, reading %d (%s)\\n\",",
    "                        YYPREFIX, YYFINAL, yychar, yys);",
    "            }",
    "#endif",
    "        }",
    "        if (yychar == 0) 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))",
    "    {",
    "        goto yyoverflow;",
    "    }",
    "    *++yystack.s_mark = (short) yystate;",
    "    *++yystack.l_mark = yyval;",
    "    goto yyloop;",
    "",
    "yyoverflow:",
    0
};

const char *const trailer_2[] =
{
    "",
    "yyabort:",
    "    yyfreestack(&yystack);",
    "    return (1);",
    "",
    "yyaccept:",
    "    yyfreestack(&yystack);",
    "    return (0);",
    "}",
    0
};

void
write_section(FILE * fp, const char *const section[])
{
    int c;
    int i;
    const char *s;

    for (i = 0; (s = section[i]) != 0; ++i)
    {
	while ((c = *s) != 0)
	{
	    putc(c, fp);
	    ++s;
	}
	if (fp == code_file)
	    ++outline;
	putc('\n', fp);
    }
}