home *** CD-ROM | disk | FTP | other *** search
- #ifndef lint
- static char yysccsid[] = "@(#)yaccpar 1.9 CEH (Berkeley) 27/04/95";
- #endif
- #define YYBYACC 1
- #define YYMAJOR 1
- #define YYMINOR 9
- #define yyclearin (yychar=(-1))
- #define yyerrok (yyerrflag=0)
- #define YYRECOVERING (yyerrflag!=0)
- #define YYPREFIX "yy"
- #line 10 "parse.y"
- /*-
- * Copyright (c) 1990 The Regents of the University of California.
- * All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Vern Paxson.
- *
- * The United States Government has rights in this work pursuant
- * to contract no. DE-AC03-76SF00098 between the United States
- * Department of Energy and the University of California.
- *
- * Redistribution and use in source and binary forms are permitted provided
- * that: (1) source distributions retain this entire copyright notice and
- * comment, and (2) distributions including binaries display the following
- * acknowledgement: ``This product includes software developed by the
- * University of California, Berkeley and its contributors'' in the
- * documentation or other materials provided with the distribution and in
- * all advertising materials mentioning features or use of this software.
- * Neither the name of the University nor the names of its contributors may
- * be used to endorse or promote products derived from this software without
- * specific prior written permission.
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
- */
-
- /* $Header: /home/daffy/u0/vern/flex/RCS/parse.y,v 2.26 95/03/05 20:37:32 vern Exp $ */
-
-
- /* Some versions of bison are broken in that they use alloca() but don't
- * declare it properly. The following is the patented (just kidding!)
- * #ifdef chud to fix the problem, courtesy of Francois Pinard.
- */
- #ifdef YYBISON
- /* AIX requires this to be the first thing in the file. */
- #ifdef __GNUC__
- #define alloca __builtin_alloca
- #else /* not __GNUC__ */
- #if HAVE_ALLOCA_H
- #include <alloca.h>
- #else /* not HAVE_ALLOCA_H */
- #ifdef _AIX
- #pragma alloca
- #else /* not _AIX */
- #ifdef __hpux
- void *alloca ();
- #else /* not __hpux */
- #ifdef __TURBOC__
- #include <malloc.h>
- #else
- char *alloca ();
- #endif /* not __TURBOC__ */
- #endif /* not __hpux */
- #endif /* not _AIX */
- #endif /* not HAVE_ALLOCA_H */
- #endif /* not __GNUC__ */
- #endif /* YYBISON */
-
- /* Bletch, ^^^^ that was ugly! */
-
-
- #include "flexdef.h"
- #include <stdarg.h>
-
- int pat, scnum, eps, headcnt, trailcnt, anyccl, lastchar, i, rulelen;
- int trlcontxt, xcluflg, currccl, cclsorted, varlength, variable_trail_rule;
-
- int *scon_stk;
- int scon_stk_ptr;
-
- static int madeany = false; /* whether we've made the '.' character class */
- int previous_continued_action; /* whether the previous rule's action was '|' */
-
- /* Expand a POSIX character class expression. */
- #define CCL_EXPR(func) \
- { \
- int c; \
- for ( c = 0; c < csize; ++c ) \
- if ( isascii(c) && func(c) ) \
- ccladd( currccl, c ); \
- }
-
- /* While POSIX defines isblank(), it's not ANSI C. */
- #define IS_BLANK(c) ((c) == ' ' || (c) == '\t')
-
- /* On some over-ambitious machines, such as DEC Alpha's, the default
- * token type is "long" instead of "int"; this leads to problems with
- * declaring yylval in flexdef.h. But so far, all the yacc's I've seen
- * wrap their definitions of YYSTYPE with "#ifndef YYSTYPE"'s, so the
- * following should ensure that the default token type is "int".
- */
- #define YYSTYPE int
-
- #line 105 "y.tab.c"
- #define CHAR 257
- #define NUMBER 258
- #define SECTEND 259
- #define SCDECL 260
- #define XSCDECL 261
- #define NAME 262
- #define PREVCCL 263
- #define EOF_OP 264
- #define OPTION_OP 265
- #define OPT_OUTFILE 266
- #define OPT_PREFIX 267
- #define OPT_YYCLASS 268
- #define CCE_ALNUM 269
- #define CCE_ALPHA 270
- #define CCE_BLANK 271
- #define CCE_CNTRL 272
- #define CCE_DIGIT 273
- #define CCE_GRAPH 274
- #define CCE_LOWER 275
- #define CCE_PRINT 276
- #define CCE_PUNCT 277
- #define CCE_SPACE 278
- #define CCE_UPPER 279
- #define CCE_XDIGIT 280
- #define YYERRCODE 256
-
-
- #include "Res.h"
-
- static const short* yylhs;
- static const short* yylen;
- static const short* yydefred;
- static const short* yydgoto;
- static const short* yysindex;
- static const short* yyrindex;
- static const short* yygindex;
- static const short* yytable;
- static const short* yycheck;
-
-
- void
- InitParseArrays (void)
- {
- SLoad(yylhs);
- SLoad(yylen);
- SLoad(yydefred);
- SLoad(yydgoto);
- SLoad(yysindex);
- SLoad(yyrindex);
- SLoad(yygindex);
- SLoad(yytable);
- SLoad(yycheck);
- }
-
- #define YYTABLESIZE 302
-
-
- #define YYFINAL 1
- #ifndef YYDEBUG
- #define YYDEBUG 0
- #endif
- #define YYMAXTOKEN 280
- #if YYDEBUG
- char *yyname[] = {
- "end-of-file",0,0,0,0,0,0,0,0,0,0,0,0,"'\\n'",0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
- 0,0,0,"'\"'",0,"'$'",0,0,0,"'('","')'","'*'","'+'","','","'-'","'.'","'/'",0,0,
- 0,0,0,0,0,0,0,0,0,0,"'<'","'='","'>'","'?'",0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
- 0,0,0,0,0,0,0,0,0,"'['",0,"']'","'^'",0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
- 0,0,0,0,0,0,0,"'{'","'|'","'}'",0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
- 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
- 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
- 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,"CHAR","NUMBER","SECTEND",
- "SCDECL","XSCDECL","NAME","PREVCCL","EOF_OP","OPTION_OP","OPT_OUTFILE",
- "OPT_PREFIX","OPT_YYCLASS","CCE_ALNUM","CCE_ALPHA","CCE_BLANK","CCE_CNTRL",
- "CCE_DIGIT","CCE_GRAPH","CCE_LOWER","CCE_PRINT","CCE_PUNCT","CCE_SPACE",
- "CCE_UPPER","CCE_XDIGIT",
- };
- char *yyrule[] = {
- "$accept : goal",
- "goal : initlex sect1 sect1end sect2 initforrule",
- "initlex :",
- "sect1 : sect1 startconddecl namelist1",
- "sect1 : sect1 options",
- "sect1 :",
- "sect1 : error",
- "sect1end : SECTEND",
- "startconddecl : SCDECL",
- "startconddecl : XSCDECL",
- "namelist1 : namelist1 NAME",
- "namelist1 : NAME",
- "namelist1 : error",
- "options : OPTION_OP optionlist",
- "optionlist : optionlist option",
- "optionlist :",
- "option : OPT_OUTFILE '=' NAME",
- "option : OPT_PREFIX '=' NAME",
- "option : OPT_YYCLASS '=' NAME",
- "sect2 : sect2 scon initforrule flexrule '\\n'",
- "sect2 : sect2 scon '{' sect2 '}'",
- "sect2 :",
- "initforrule :",
- "flexrule : '^' rule",
- "flexrule : rule",
- "flexrule : EOF_OP",
- "flexrule : error",
- "scon_stk_ptr :",
- "scon : '<' scon_stk_ptr namelist2 '>'",
- "scon : '<' '*' '>'",
- "scon :",
- "namelist2 : namelist2 ',' sconname",
- "namelist2 : sconname",
- "namelist2 : error",
- "sconname : NAME",
- "rule : re2 re",
- "rule : re2 re '$'",
- "rule : re '$'",
- "rule : re",
- "re : re '|' series",
- "re : series",
- "re2 : re '/'",
- "series : series singleton",
- "series : singleton",
- "singleton : singleton '*'",
- "singleton : singleton '+'",
- "singleton : singleton '?'",
- "singleton : singleton '{' NUMBER ',' NUMBER '}'",
- "singleton : singleton '{' NUMBER ',' '}'",
- "singleton : singleton '{' NUMBER '}'",
- "singleton : '.'",
- "singleton : fullccl",
- "singleton : PREVCCL",
- "singleton : '\"' string '\"'",
- "singleton : '(' re ')'",
- "singleton : CHAR",
- "fullccl : '[' ccl ']'",
- "fullccl : '[' '^' ccl ']'",
- "ccl : ccl CHAR '-' CHAR",
- "ccl : ccl CHAR",
- "ccl : ccl ccl_expr",
- "ccl :",
- "ccl_expr : CCE_ALNUM",
- "ccl_expr : CCE_ALPHA",
- "ccl_expr : CCE_BLANK",
- "ccl_expr : CCE_CNTRL",
- "ccl_expr : CCE_DIGIT",
- "ccl_expr : CCE_GRAPH",
- "ccl_expr : CCE_LOWER",
- "ccl_expr : CCE_PRINT",
- "ccl_expr : CCE_PUNCT",
- "ccl_expr : CCE_SPACE",
- "ccl_expr : CCE_UPPER",
- "ccl_expr : CCE_XDIGIT",
- "string : string CHAR",
- "string :",
- };
- #endif
- #ifndef YYSTYPE
- typedef int YYSTYPE;
- #endif
- #ifdef YYSTACKSIZE
- #undef YYMAXDEPTH
- #define YYMAXDEPTH YYSTACKSIZE
- #else
- #ifdef YYMAXDEPTH
- #define YYSTACKSIZE YYMAXDEPTH
- #else
- #define YYSTACKSIZE 500
- #define YYMAXDEPTH 500
- #endif
- #endif
- int yydebug, yynerrs, yyerrflag, yychar;
- short *yyssp;
- YYSTYPE *yyvsp;
- YYSTYPE yyval, yylval;
- short yyss[YYSTACKSIZE];
- YYSTYPE yyvs[YYSTACKSIZE];
- #define yystacksize YYSTACKSIZE
- #line 769 "parse.y"
-
-
- /* build_eof_action - build the "<<EOF>>" action for the active start
- * conditions
- */
-
- void build_eof_action()
- {
- register int i;
- char action_text[MAXLINE];
-
- for ( i = 1; i <= scon_stk_ptr; ++i )
- {
- if ( sceof[scon_stk[i]] )
- format_pinpoint_message(
- "multiple <<EOF>> rules for start condition %s",
- scname[scon_stk[i]] );
-
- else
- {
- sceof[scon_stk[i]] = true;
- sprintf( action_text, "case YY_STATE_EOF(%s):\n",
- scname[scon_stk[i]] );
- add_action( action_text );
- }
- }
-
- line_directive_out( (FILE *) 0, 1 );
-
- /* This isn't a normal rule after all - don't count it as
- * such, so we don't have any holes in the rule numbering
- * (which make generating "rule can never match" warnings
- * more difficult.
- */
- --num_rules;
- ++num_eof_rules;
- }
-
-
- /* format_synerr - write out formatted syntax error */
-
- void format_synerr( msg, arg )
- char msg[], arg[];
- {
- char errmsg[MAXLINE];
-
- (void) sprintf( errmsg, msg, arg );
- synerr( errmsg );
- }
-
-
- /* synerr - report a syntax error */
-
- void synerr( str )
- char str[];
- {
- syntaxerror = true;
- pinpoint_message( str );
- }
-
-
- /* format_warn - write out formatted warning */
-
- void format_warn( msg, arg )
- char msg[], arg[];
- {
- char warn_msg[MAXLINE];
-
- (void) sprintf( warn_msg, msg, arg );
- warn( warn_msg );
- }
-
-
- /* warn - report a warning, unless -w was given */
-
- void warn( str )
- char str[];
- {
- line_warning( str, linenum );
- }
-
- /* format_pinpoint_message - write out a message formatted with one string,
- * pinpointing its location
- */
-
- void format_pinpoint_message( msg, arg )
- char msg[], arg[];
- {
- char errmsg[MAXLINE];
-
- (void) sprintf( errmsg, msg, arg );
- pinpoint_message( errmsg );
- }
-
-
- /* pinpoint_message - write out a message, pinpointing its location */
-
- void pinpoint_message( str )
- char str[];
- {
- line_pinpoint( str, linenum );
- }
-
-
- /* line_warning - report a warning at a given line, unless -w was given */
-
- void line_warning( str, line )
- char str[];
- int line;
- {
- char warning[MAXLINE];
-
- if ( ! nowarn )
- {
- sprintf( warning, "warning, %s", str );
- line_pinpoint( warning, line );
- }
- }
-
-
- /* line_pinpoint - write out a message, pinpointing it at the given line */
-
- void line_pinpoint( str, line )
- char str[];
- int line;
- {
- #ifdef macintosh
- fflush(stdout);
- fprintf( stderr, "File \"%s\"; Line %d\t# %s\n", infilename, line, str );
- #else
- fprintf( stderr, "\"%s\", line %d: %s\n", infilename, line, str );
- #endif
- }
-
-
- /* yyerror - eat up an error message from the parser;
- * currently, messages are ignore
- */
-
- void yyerror( msg )
- char msg[];
- {
- }
- #line 531 "y.tab.c"
- #define YYABORT goto yyabort
- #define YYREJECT goto yyabort
- #define YYACCEPT goto yyaccept
- #define YYERROR goto yyerrlab
-
-
- static void
- yyprintf (const char* format, ...)
- {
- if (yydebug) {
- va_list ap;
- printf("yydebug: ");
- va_start(ap, format);
- vprintf(format, ap);
- va_end(ap);
- }
- }
-
-
- int
- yyparse (void)
- {
- register int yym, yyn, yystate;
- #if YYDEBUG
- register char* yys;
- extern char* getenv(const char*);
-
- if (yys = getenv("YYDEBUG")) {
- yyn = *yys;
- if (yyn >= '0' && yyn <= '9')
- yydebug = yyn - '0';
- }
- #endif
-
- InitParseArrays(); // CEH
-
- yynerrs = 0;
- yyerrflag = 0;
- yychar = (-1);
-
- yyssp = yyss;
- yyvsp = yyvs;
- *yyssp = yystate = 0;
-
- yyloop:
- if (yyn = yydefred[yystate]) 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";
- yyprintf("state %d, reading %d (%s)\n", yystate, yychar, yys);
- }
- #endif
- }
- if ((yyn = yysindex[yystate]) && (yyn += yychar) >= 0 &&
- yyn <= YYTABLESIZE && yycheck[yyn] == yychar)
- {
- #if YYDEBUG
- yyprintf("state %d, shifting to state %d\n", yystate, yytable[yyn]);
- #endif
- if (yyssp >= yyss + yystacksize - 1)
- goto yyoverflow;
-
- *++yyssp = yystate = yytable[yyn];
- *++yyvsp = yylval;
- yychar = (-1);
- 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;
- #ifdef lint
- goto yynewerror;
- #endif
- yynewerror:
- yyerror("syntax error");
- #ifdef lint
- goto yyerrlab;
- #endif
- yyerrlab:
- ++yynerrs;
- yyinrecovery:
- if (yyerrflag < 3) {
- yyerrflag = 3;
- for (;;) {
- if ((yyn = yysindex[*yyssp]) && (yyn += YYERRCODE) >= 0 &&
- yyn <= YYTABLESIZE && yycheck[yyn] == YYERRCODE) {
- #if YYDEBUG
- yyprintf("state %d, error recovery shifting to state %d\n",
- *yyssp, yytable[yyn]);
- #endif
- if (yyssp >= yyss + yystacksize - 1)
- goto yyoverflow;
-
- *++yyssp = yystate = yytable[yyn];
- *++yyvsp = yylval;
- goto yyloop;
- } else {
- #if YYDEBUG
- yyprintf("error recovery discarding state %d\n", *yyssp);
- #endif
- if (yyssp <= yyss) goto yyabort;
- --yyssp;
- --yyvsp;
- }
- }
- } else {
- if (yychar == 0) goto yyabort;
- #if YYDEBUG
- if (yydebug) {
- yys = 0;
- if (yychar <= YYMAXTOKEN) yys = yyname[yychar];
- if (!yys) yys = "illegal-symbol";
- yyprintf("state %d, error recovery discards token %d (%s)\n",
- yystate, yychar, yys);
- }
- #endif
- yychar = (-1);
- goto yyloop;
- }
- yyreduce:
- #if YYDEBUG
- yyprintf("state %d, reducing by rule %d (%s)\n", yystate, yyn, yyrule[yyn]);
- #endif
- yym = yylen[yyn];
- yyval = yyvsp[1-yym];
- switch (yyn) {
- case 1:
- #line 106 "parse.y"
- { /* add default rule */
- int def_rule;
-
- pat = cclinit();
- cclnegate( pat );
-
- def_rule = mkstate( -pat );
-
- /* Remember the number of the default rule so we
- * don't generate "can't match" warnings for it.
- */
- default_rule = num_rules;
-
- finish_rule( def_rule, false, 0, 0 );
-
- for ( i = 1; i <= lastsc; ++i )
- scset[i] = mkbranch( scset[i], def_rule );
-
- if ( spprdflt )
- add_action(
- "YY_FATAL_ERROR( \"flex scanner jammed\" )" );
- else
- add_action( "ECHO" );
-
- add_action( ";\n\tYY_BREAK\n" );
- }
- break;
- case 2:
- #line 135 "parse.y"
- { /* initialize for processing rules */
-
- /* Create default DFA start condition. */
- scinstal( "INITIAL", false );
- }
- break;
- case 6:
- #line 146 "parse.y"
- { synerr( "unknown error processing section 1" ); }
- break;
- case 7:
- #line 150 "parse.y"
- {
- check_options();
- scon_stk = allocate_integer_array( lastsc + 1 );
- scon_stk_ptr = 0;
- }
- break;
- case 8:
- #line 158 "parse.y"
- { xcluflg = false; }
- break;
- case 9:
- #line 161 "parse.y"
- { xcluflg = true; }
- break;
- case 10:
- #line 165 "parse.y"
- { scinstal( nmstr, xcluflg ); }
- break;
- case 11:
- #line 168 "parse.y"
- { scinstal( nmstr, xcluflg ); }
- break;
- case 12:
- #line 171 "parse.y"
- { synerr( "bad start condition list" ); }
- break;
- case 16:
- #line 182 "parse.y"
- {
- outfilename = copy_string( nmstr );
- did_outfilename = 1;
- }
- break;
- case 17:
- #line 187 "parse.y"
- { prefix = copy_string( nmstr ); }
- break;
- case 18:
- #line 189 "parse.y"
- { yyclass = copy_string( nmstr ); }
- break;
- case 19:
- #line 193 "parse.y"
- { scon_stk_ptr = yyvsp[-3]; }
- break;
- case 20:
- #line 195 "parse.y"
- { scon_stk_ptr = yyvsp[-3]; }
- break;
- case 22:
- #line 200 "parse.y"
- {
- /* Initialize for a parse of one rule. */
- trlcontxt = variable_trail_rule = varlength = false;
- trailcnt = headcnt = rulelen = 0;
- current_state_type = STATE_NORMAL;
- previous_continued_action = continued_action;
- in_rule = true;
-
- new_rule();
- }
- break;
- case 23:
- #line 213 "parse.y"
- {
- pat = yyvsp[0];
- finish_rule( pat, variable_trail_rule,
- headcnt, trailcnt );
-
- if ( scon_stk_ptr > 0 )
- {
- for ( i = 1; i <= scon_stk_ptr; ++i )
- scbol[scon_stk[i]] =
- mkbranch( scbol[scon_stk[i]],
- pat );
- }
-
- else
- {
- /* Add to all non-exclusive start conditions,
- * including the default (0) start condition.
- */
-
- for ( i = 1; i <= lastsc; ++i )
- if ( ! scxclu[i] )
- scbol[i] = mkbranch( scbol[i],
- pat );
- }
-
- if ( ! bol_needed )
- {
- bol_needed = true;
-
- if ( performance_report > 1 )
- pinpoint_message(
- "'^' operator results in sub-optimal performance" );
- }
- }
- break;
- case 24:
- #line 249 "parse.y"
- {
- pat = yyvsp[0];
- finish_rule( pat, variable_trail_rule,
- headcnt, trailcnt );
-
- if ( scon_stk_ptr > 0 )
- {
- for ( i = 1; i <= scon_stk_ptr; ++i )
- scset[scon_stk[i]] =
- mkbranch( scset[scon_stk[i]],
- pat );
- }
-
- else
- {
- for ( i = 1; i <= lastsc; ++i )
- if ( ! scxclu[i] )
- scset[i] =
- mkbranch( scset[i],
- pat );
- }
- }
- break;
- case 25:
- #line 273 "parse.y"
- {
- if ( scon_stk_ptr > 0 )
- build_eof_action();
-
- else
- {
- /* This EOF applies to all start conditions
- * which don't already have EOF actions.
- */
- for ( i = 1; i <= lastsc; ++i )
- if ( ! sceof[i] )
- scon_stk[++scon_stk_ptr] = i;
-
- if ( scon_stk_ptr == 0 )
- warn(
- "all start conditions already have <<EOF>> rules" );
-
- else
- build_eof_action();
- }
- }
- break;
- case 26:
- #line 296 "parse.y"
- { synerr( "unrecognized rule" ); }
- break;
- case 27:
- #line 300 "parse.y"
- { yyval = scon_stk_ptr; }
- break;
- case 28:
- #line 304 "parse.y"
- { yyval = yyvsp[-2]; }
- break;
- case 29:
- #line 307 "parse.y"
- {
- yyval = scon_stk_ptr;
-
- for ( i = 1; i <= lastsc; ++i )
- {
- int j;
-
- for ( j = 1; j <= scon_stk_ptr; ++j )
- if ( scon_stk[j] == i )
- break;
-
- if ( j > scon_stk_ptr )
- scon_stk[++scon_stk_ptr] = i;
- }
- }
- break;
- case 30:
- #line 324 "parse.y"
- { yyval = scon_stk_ptr; }
- break;
- case 33:
- #line 332 "parse.y"
- { synerr( "bad start condition list" ); }
- break;
- case 34:
- #line 336 "parse.y"
- {
- if ( (scnum = sclookup( nmstr )) == 0 )
- format_pinpoint_message(
- "undeclared start condition %s",
- nmstr );
- else
- {
- for ( i = 1; i <= scon_stk_ptr; ++i )
- if ( scon_stk[i] == scnum )
- {
- format_warn(
- "<%s> specified twice",
- scname[scnum] );
- break;
- }
-
- if ( i > scon_stk_ptr )
- scon_stk[++scon_stk_ptr] = scnum;
- }
- }
- break;
- case 35:
- #line 359 "parse.y"
- {
- if ( transchar[lastst[yyvsp[0]]] != SYM_EPSILON )
- /* Provide final transition \now/ so it
- * will be marked as a trailing context
- * state.
- */
- yyvsp[0] = link_machines( yyvsp[0],
- mkstate( SYM_EPSILON ) );
-
- mark_beginning_as_normal( yyvsp[0] );
- current_state_type = STATE_NORMAL;
-
- if ( previous_continued_action )
- {
- /* We need to treat this as variable trailing
- * context so that the backup does not happen
- * in the action but before the action switch
- * statement. If the backup happens in the
- * action, then the rules "falling into" this
- * one's action will *also* do the backup,
- * erroneously.
- */
- if ( ! varlength || headcnt != 0 )
- warn(
- "trailing context made variable due to preceding '|' action" );
-
- /* Mark as variable. */
- varlength = true;
- headcnt = 0;
- }
-
- if ( lex_compat || (varlength && headcnt == 0) )
- { /* variable trailing context rule */
- /* Mark the first part of the rule as the
- * accepting "head" part of a trailing
- * context rule.
- *
- * By the way, we didn't do this at the
- * beginning of this production because back
- * then current_state_type was set up for a
- * trail rule, and add_accept() can create
- * a new state ...
- */
- add_accept( yyvsp[-1],
- num_rules | YY_TRAILING_HEAD_MASK );
- variable_trail_rule = true;
- }
-
- else
- trailcnt = rulelen;
-
- yyval = link_machines( yyvsp[-1], yyvsp[0] );
- }
- break;
- case 36:
- #line 414 "parse.y"
- { synerr( "trailing context used twice" ); }
- break;
- case 37:
- #line 417 "parse.y"
- {
- headcnt = 0;
- trailcnt = 1;
- rulelen = 1;
- varlength = false;
-
- current_state_type = STATE_TRAILING_CONTEXT;
-
- if ( trlcontxt )
- {
- synerr( "trailing context used twice" );
- yyval = mkstate( SYM_EPSILON );
- }
-
- else if ( previous_continued_action )
- {
- /* See the comment in the rule for "re2 re"
- * above.
- */
- warn(
- "trailing context made variable due to preceding '|' action" );
-
- varlength = true;
- }
-
- if ( lex_compat || varlength )
- {
- /* Again, see the comment in the rule for
- * "re2 re" above.
- */
- add_accept( yyvsp[-1],
- num_rules | YY_TRAILING_HEAD_MASK );
- variable_trail_rule = true;
- }
-
- trlcontxt = true;
-
- eps = mkstate( SYM_EPSILON );
- yyval = link_machines( yyvsp[-1],
- link_machines( eps, mkstate( '\n' ) ) );
- }
- break;
- case 38:
- #line 460 "parse.y"
- {
- yyval = yyvsp[0];
-
- if ( trlcontxt )
- {
- if ( lex_compat || (varlength && headcnt == 0) )
- /* Both head and trail are
- * variable-length.
- */
- variable_trail_rule = true;
- else
- trailcnt = rulelen;
- }
- }
- break;
- case 39:
- #line 478 "parse.y"
- {
- varlength = true;
- yyval = mkor( yyvsp[-2], yyvsp[0] );
- }
- break;
- case 40:
- #line 484 "parse.y"
- { yyval = yyvsp[0]; }
- break;
- case 41:
- #line 489 "parse.y"
- {
- /* This rule is written separately so the
- * reduction will occur before the trailing
- * series is parsed.
- */
-
- if ( trlcontxt )
- synerr( "trailing context used twice" );
- else
- trlcontxt = true;
-
- if ( varlength )
- /* We hope the trailing context is
- * fixed-length.
- */
- varlength = false;
- else
- headcnt = rulelen;
-
- rulelen = 0;
-
- current_state_type = STATE_TRAILING_CONTEXT;
- yyval = yyvsp[-1];
- }
- break;
- case 42:
- #line 516 "parse.y"
- {
- /* This is where concatenation of adjacent patterns
- * gets done.
- */
- yyval = link_machines( yyvsp[-1], yyvsp[0] );
- }
- break;
- case 43:
- #line 524 "parse.y"
- { yyval = yyvsp[0]; }
- break;
- case 44:
- #line 528 "parse.y"
- {
- varlength = true;
-
- yyval = mkclos( yyvsp[-1] );
- }
- break;
- case 45:
- #line 535 "parse.y"
- {
- varlength = true;
- yyval = mkposcl( yyvsp[-1] );
- }
- break;
- case 46:
- #line 541 "parse.y"
- {
- varlength = true;
- yyval = mkopt( yyvsp[-1] );
- }
- break;
- case 47:
- #line 547 "parse.y"
- {
- varlength = true;
-
- if ( yyvsp[-3] > yyvsp[-1] || yyvsp[-3] < 0 )
- {
- synerr( "bad iteration values" );
- yyval = yyvsp[-5];
- }
- else
- {
- if ( yyvsp[-3] == 0 )
- {
- if ( yyvsp[-1] <= 0 )
- {
- synerr(
- "bad iteration values" );
- yyval = yyvsp[-5];
- }
- else
- yyval = mkopt(
- mkrep( yyvsp[-5], 1, yyvsp[-1] ) );
- }
- else
- yyval = mkrep( yyvsp[-5], yyvsp[-3], yyvsp[-1] );
- }
- }
- break;
- case 48:
- #line 575 "parse.y"
- {
- varlength = true;
-
- if ( yyvsp[-2] <= 0 )
- {
- synerr( "iteration value must be positive" );
- yyval = yyvsp[-4];
- }
-
- else
- yyval = mkrep( yyvsp[-4], yyvsp[-2], INFINITY );
- }
- break;
- case 49:
- #line 589 "parse.y"
- {
- /* The singleton could be something like "(foo)",
- * in which case we have no idea what its length
- * is, so we punt here.
- */
- varlength = true;
-
- if ( yyvsp[-1] <= 0 )
- {
- synerr( "iteration value must be positive" );
- yyval = yyvsp[-3];
- }
-
- else
- yyval = link_machines( yyvsp[-3],
- copysingl( yyvsp[-3], yyvsp[-1] - 1 ) );
- }
- break;
- case 50:
- #line 608 "parse.y"
- {
- if ( ! madeany )
- {
- /* Create the '.' character class. */
- anyccl = cclinit();
- ccladd( anyccl, '\n' );
- cclnegate( anyccl );
-
- if ( useecs )
- mkeccl( ccltbl + cclmap[anyccl],
- ccllen[anyccl], nextecm,
- ecgroup, csize, csize );
-
- madeany = true;
- }
-
- ++rulelen;
-
- yyval = mkstate( -anyccl );
- }
- break;
- case 51:
- #line 630 "parse.y"
- {
- if ( ! cclsorted )
- /* Sort characters for fast searching. We
- * use a shell sort since this list could
- * be large.
- */
- cshell( ccltbl + cclmap[yyvsp[0]], ccllen[yyvsp[0]], true );
-
- if ( useecs )
- mkeccl( ccltbl + cclmap[yyvsp[0]], ccllen[yyvsp[0]],
- nextecm, ecgroup, csize, csize );
-
- ++rulelen;
-
- yyval = mkstate( -yyvsp[0] );
- }
- break;
- case 52:
- #line 648 "parse.y"
- {
- ++rulelen;
-
- yyval = mkstate( -yyvsp[0] );
- }
- break;
- case 53:
- #line 655 "parse.y"
- { yyval = yyvsp[-1]; }
- break;
- case 54:
- #line 658 "parse.y"
- { yyval = yyvsp[-1]; }
- break;
- case 55:
- #line 661 "parse.y"
- {
- ++rulelen;
-
- if ( caseins && yyvsp[0] >= 'A' && yyvsp[0] <= 'Z' )
- yyvsp[0] = clower( yyvsp[0] );
-
- yyval = mkstate( yyvsp[0] );
- }
- break;
- case 56:
- #line 672 "parse.y"
- { yyval = yyvsp[-1]; }
- break;
- case 57:
- #line 675 "parse.y"
- {
- cclnegate( yyvsp[-1] );
- yyval = yyvsp[-1];
- }
- break;
- case 58:
- #line 682 "parse.y"
- {
- if ( caseins )
- {
- if ( yyvsp[-2] >= 'A' && yyvsp[-2] <= 'Z' )
- yyvsp[-2] = clower( yyvsp[-2] );
- if ( yyvsp[0] >= 'A' && yyvsp[0] <= 'Z' )
- yyvsp[0] = clower( yyvsp[0] );
- }
-
- if ( yyvsp[-2] > yyvsp[0] )
- synerr( "negative range in character class" );
-
- else
- {
- for ( i = yyvsp[-2]; i <= yyvsp[0]; ++i )
- ccladd( yyvsp[-3], i );
-
- /* Keep track if this ccl is staying in
- * alphabetical order.
- */
- cclsorted = cclsorted && (yyvsp[-2] > lastchar);
- lastchar = yyvsp[0];
- }
-
- yyval = yyvsp[-3];
- }
- break;
- case 59:
- #line 710 "parse.y"
- {
- if ( caseins && yyvsp[0] >= 'A' && yyvsp[0] <= 'Z' )
- yyvsp[0] = clower( yyvsp[0] );
-
- ccladd( yyvsp[-1], yyvsp[0] );
- cclsorted = cclsorted && (yyvsp[0] > lastchar);
- lastchar = yyvsp[0];
- yyval = yyvsp[-1];
- }
- break;
- case 60:
- #line 721 "parse.y"
- {
- /* Too hard to properly maintain cclsorted. */
- cclsorted = false;
- yyval = yyvsp[-1];
- }
- break;
- case 61:
- #line 728 "parse.y"
- {
- cclsorted = true;
- lastchar = 0;
- currccl = yyval = cclinit();
- }
- break;
- case 62:
- #line 735 "parse.y"
- { CCL_EXPR(isalnum) }
- break;
- case 63:
- #line 736 "parse.y"
- { CCL_EXPR(isalpha) }
- break;
- case 64:
- #line 737 "parse.y"
- { CCL_EXPR(IS_BLANK) }
- break;
- case 65:
- #line 738 "parse.y"
- { CCL_EXPR(iscntrl) }
- break;
- case 66:
- #line 739 "parse.y"
- { CCL_EXPR(isdigit) }
- break;
- case 67:
- #line 740 "parse.y"
- { CCL_EXPR(isgraph) }
- break;
- case 68:
- #line 741 "parse.y"
- { CCL_EXPR(islower) }
- break;
- case 69:
- #line 742 "parse.y"
- { CCL_EXPR(isprint) }
- break;
- case 70:
- #line 743 "parse.y"
- { CCL_EXPR(ispunct) }
- break;
- case 71:
- #line 744 "parse.y"
- { CCL_EXPR(isspace) }
- break;
- case 72:
- #line 745 "parse.y"
- {
- if ( caseins )
- CCL_EXPR(islower)
- else
- CCL_EXPR(isupper)
- }
- break;
- case 73:
- #line 751 "parse.y"
- { CCL_EXPR(isxdigit) }
- break;
- case 74:
- #line 755 "parse.y"
- {
- if ( caseins && yyvsp[0] >= 'A' && yyvsp[0] <= 'Z' )
- yyvsp[0] = clower( yyvsp[0] );
-
- ++rulelen;
-
- yyval = link_machines( yyvsp[-1], mkstate( yyvsp[0] ) );
- }
- break;
- case 75:
- #line 765 "parse.y"
- { yyval = mkstate( SYM_EPSILON ); }
- break;
- #line 1379 "y.tab.c"
- }
- yyssp -= yym;
- yystate = *yyssp;
- yyvsp -= yym;
- yym = yylhs[yyn];
- if (yystate == 0 && yym == 0) {
- #if YYDEBUG
- yyprintf("after reduction, shifting from state 0 to state %d\n", YYFINAL);
- #endif
- yystate = YYFINAL;
- *++yyssp = YYFINAL;
- *++yyvsp = 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";
- yyprintf("state %d, reading %d (%s)\n", 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
- yyprintf("after reduction, shifting from state %d to state %d\n", *yyssp, yystate);
- #endif
- if (yyssp >= yyss + yystacksize - 1)
- goto yyoverflow;
-
- *++yyssp = yystate;
- *++yyvsp = yyval;
- goto yyloop;
- yyoverflow:
- yyerror("yacc stack overflow");
- yyabort:
- return 1;
- yyaccept:
- return 0;
- }
-