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- #ifndef lint
- static const char yysccsid[] = "@(#)yaccpar 1.9 (Berkeley) 02/21/93";
- #endif
- #define YYBYACC 1
- #define YYMAJOR 1
- #define YYMINOR 9
- #define YYPATCH 20140101
- #define YYEMPTY (-1)
- #define yyclearin (yychar = YYEMPTY)
- #define yyerrok (yyerrflag = 0)
- #define YYRECOVERING() (yyerrflag != 0)
- #define YYPREFIX "yy"
- #define YYPURE 0
- #line 2 "/home/mike/folder/studium_ms/semester_5/master_thesis/repo_prepare/zmap/src/parser.y"
- #include <stdio.h>
- #include <string.h>
- #include "expression.h"
- #include "lexer.h"
- #include "filter.h"
- void yyerror(const char *str)
- {
- fprintf(stderr,"Parse error: %s\n",str);
- }
-
- int yywrap()
- {
- return 1;
- }
- extern node_t *zfilter;
- #line 22 "/home/mike/folder/studium_ms/semester_5/master_thesis/repo_prepare/zmap/src/parser.y"
- #ifdef YYSTYPE
- #undef YYSTYPE_IS_DECLARED
- #define YYSTYPE_IS_DECLARED 1
- #endif
- #ifndef YYSTYPE_IS_DECLARED
- #define YYSTYPE_IS_DECLARED 1
- typedef union {
- int int_literal;
- char *string_literal;
- struct node_st *expr;
- } YYSTYPE;
- #endif /* !YYSTYPE_IS_DECLARED */
- #line 51 "/home/mike/folder/studium_ms/semester_5/master_thesis/repo_prepare/zmap/src/parser.c"
- /* 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
- extern int YYPARSE_DECL();
- #define T_AND 257
- #define T_OR 258
- #define T_NUMBER 259
- #define T_FIELD 260
- #define T_NOT_EQ 261
- #define T_GT_EQ 262
- #define T_LT_EQ 263
- #define YYERRCODE 256
- static const short yylhs[] = { -1,
- 0, 4, 4, 4, 4, 1, 1, 2, 2, 2,
- 2, 2, 2, 3, 3,
- };
- static const short yylen[] = { 2,
- 1, 3, 3, 3, 1, 1, 1, 3, 3, 3,
- 3, 3, 3, 3, 3,
- };
- static const short yydefred[] = { 0,
- 0, 0, 0, 5, 6, 7, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 4, 11, 15, 12,
- 9, 10, 8, 14, 13, 3, 0,
- };
- static const short yydgoto[] = { 3,
- 4, 5, 6, 7,
- };
- static const short yysindex[] = { -40,
- -40, -57, 0, 0, 0, 0, -250, -39, -249, -245,
- -244, -243, -247, -242, -40, -40, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, -248,
- };
- static const short yyrindex[] = { 0,
- 0, 0, 0, 0, 0, 0, 18, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 1,
- };
- static const short yygindex[] = { 0,
- 0, 0, 0, 5,
- };
- #define YYTABLESIZE 259
- static const short yytable[] = { 1,
- 2, 17, 12, 13, 11, 8, 15, 16, 15, 18,
- 19, 23, 24, 20, 21, 22, 25, 1, 0, 26,
- 27, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 2, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 9, 10, 14, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 15, 16, 2,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 2,
- };
- static const short yycheck[] = { 40,
- 0, 41, 60, 61, 62, 1, 257, 258, 257, 259,
- 260, 259, 260, 259, 259, 259, 259, 0, -1, 15,
- 16, -1, -1, -1, -1, -1, -1, -1, -1, -1,
- -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
- -1, 41, -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, -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, 261, 262, 263, -1, -1, -1, -1,
- -1, -1, -1, -1, -1, -1, -1, 257, 258, 260,
- -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,
- };
- #define YYFINAL 3
- #ifndef YYDEBUG
- #define YYDEBUG 0
- #endif
- #define YYMAXTOKEN 263
- #define YYTRANSLATE(a) ((a) > YYMAXTOKEN ? (YYMAXTOKEN + 1) : (a))
- #if YYDEBUG
- static const 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,
- 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,"T_AND",
- "T_OR","T_NUMBER","T_FIELD","T_NOT_EQ","T_GT_EQ","T_LT_EQ","illegal-symbol",
- };
- static const char *yyrule[] = {
- "$accept : expression",
- "expression : filter_expr",
- "filter_expr : filter_expr T_OR filter_expr",
- "filter_expr : filter_expr T_AND filter_expr",
- "filter_expr : '(' filter_expr ')'",
- "filter_expr : filter",
- "filter : number_filter",
- "filter : string_filter",
- "number_filter : T_FIELD '=' T_NUMBER",
- "number_filter : T_FIELD '>' T_NUMBER",
- "number_filter : T_FIELD '<' T_NUMBER",
- "number_filter : T_FIELD T_NOT_EQ T_NUMBER",
- "number_filter : T_FIELD T_GT_EQ T_NUMBER",
- "number_filter : T_FIELD T_LT_EQ T_NUMBER",
- "string_filter : T_FIELD '=' T_FIELD",
- "string_filter : T_FIELD T_NOT_EQ T_FIELD",
- };
- #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;
- short *s_base;
- short *s_mark;
- short *s_last;
- YYSTYPE *l_base;
- YYSTYPE *l_mark;
- } YYSTACKDATA;
- /* variables for the parser stack */
- static YYSTACKDATA yystack;
- #line 143 "/home/mike/folder/studium_ms/semester_5/master_thesis/repo_prepare/zmap/src/parser.y"
- #line 252 "/home/mike/folder/studium_ms/semester_5/master_thesis/repo_prepare/zmap/src/parser.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;
- 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()
- {
- 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 = 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))
- {
- 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("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))
- {
- 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 = 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 1:
- #line 45 "/home/mike/folder/studium_ms/semester_5/master_thesis/repo_prepare/zmap/src/parser.y"
- {
- zfilter = yystack.l_mark[0].expr;
- }
- break;
- case 2:
- #line 52 "/home/mike/folder/studium_ms/semester_5/master_thesis/repo_prepare/zmap/src/parser.y"
- {
- yyval.expr = make_op_node(OR);
- yyval.expr->left_child = yystack.l_mark[-2].expr;
- yyval.expr->right_child = yystack.l_mark[0].expr;
- }
- break;
- case 3:
- #line 58 "/home/mike/folder/studium_ms/semester_5/master_thesis/repo_prepare/zmap/src/parser.y"
- {
- yyval.expr = make_op_node(AND);
- yyval.expr->left_child = yystack.l_mark[-2].expr;
- yyval.expr->right_child = yystack.l_mark[0].expr;
- }
- break;
- case 4:
- #line 64 "/home/mike/folder/studium_ms/semester_5/master_thesis/repo_prepare/zmap/src/parser.y"
- {
- yyval.expr = yystack.l_mark[-1].expr;
- }
- break;
- case 5:
- #line 68 "/home/mike/folder/studium_ms/semester_5/master_thesis/repo_prepare/zmap/src/parser.y"
- {
- yyval.expr = yystack.l_mark[0].expr;
- }
- break;
- case 6:
- #line 74 "/home/mike/folder/studium_ms/semester_5/master_thesis/repo_prepare/zmap/src/parser.y"
- {
- yyval.expr = yystack.l_mark[0].expr;
- }
- break;
- case 7:
- #line 78 "/home/mike/folder/studium_ms/semester_5/master_thesis/repo_prepare/zmap/src/parser.y"
- {
- yyval.expr = yystack.l_mark[0].expr;
- }
- break;
- case 8:
- #line 84 "/home/mike/folder/studium_ms/semester_5/master_thesis/repo_prepare/zmap/src/parser.y"
- {
- yyval.expr = make_op_node(EQ);
- yyval.expr->left_child = make_field_node(yystack.l_mark[-2].string_literal);
- yyval.expr->right_child = make_int_node(yystack.l_mark[0].int_literal);
- }
- break;
- case 9:
- #line 91 "/home/mike/folder/studium_ms/semester_5/master_thesis/repo_prepare/zmap/src/parser.y"
- {
- yyval.expr = make_op_node(GT);
- yyval.expr->left_child = make_field_node(yystack.l_mark[-2].string_literal);
- yyval.expr->right_child = make_int_node(yystack.l_mark[0].int_literal);
- }
- break;
- case 10:
- #line 98 "/home/mike/folder/studium_ms/semester_5/master_thesis/repo_prepare/zmap/src/parser.y"
- {
- yyval.expr = make_op_node(LT);
- yyval.expr->left_child = make_field_node(yystack.l_mark[-2].string_literal);
- yyval.expr->right_child = make_int_node(yystack.l_mark[0].int_literal);
- }
- break;
- case 11:
- #line 105 "/home/mike/folder/studium_ms/semester_5/master_thesis/repo_prepare/zmap/src/parser.y"
- {
- yyval.expr = make_op_node(NEQ);
- yyval.expr->left_child = make_field_node(yystack.l_mark[-2].string_literal);
- yyval.expr->right_child = make_int_node(yystack.l_mark[0].int_literal);
- }
- break;
- case 12:
- #line 112 "/home/mike/folder/studium_ms/semester_5/master_thesis/repo_prepare/zmap/src/parser.y"
- {
- yyval.expr = make_op_node(GT_EQ);
- yyval.expr->left_child = make_field_node(yystack.l_mark[-2].string_literal);
- yyval.expr->right_child = make_int_node(yystack.l_mark[0].int_literal);
- }
- break;
- case 13:
- #line 119 "/home/mike/folder/studium_ms/semester_5/master_thesis/repo_prepare/zmap/src/parser.y"
- {
- yyval.expr = make_op_node(LT_EQ);
- yyval.expr->left_child = make_field_node(yystack.l_mark[-2].string_literal);
- yyval.expr->right_child = make_int_node(yystack.l_mark[0].int_literal);
- }
- break;
- case 14:
- #line 128 "/home/mike/folder/studium_ms/semester_5/master_thesis/repo_prepare/zmap/src/parser.y"
- {
- yyval.expr = make_op_node(EQ);
- yyval.expr->left_child = make_field_node(yystack.l_mark[-2].string_literal);
- yyval.expr->right_child = make_string_node(yystack.l_mark[0].string_literal);
- }
- break;
- case 15:
- #line 135 "/home/mike/folder/studium_ms/semester_5/master_thesis/repo_prepare/zmap/src/parser.y"
- {
- yyval.expr = make_op_node(NEQ);
- yyval.expr->left_child = make_field_node(yystack.l_mark[-2].string_literal);
- yyval.expr->right_child = make_string_node(yystack.l_mark[0].string_literal);
- }
- break;
- #line 564 "/home/mike/folder/studium_ms/semester_5/master_thesis/repo_prepare/zmap/src/parser.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 = 0;
- #if YYDEBUG
- if (yydebug)
- {
- yys = yyname[YYTRANSLATE(yychar)];
- 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:
- yyerror("yacc stack overflow");
- yyabort:
- yyfreestack(&yystack);
- return (1);
- yyaccept:
- yyfreestack(&yystack);
- return (0);
- }
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