Annotation of gcc/bi-parser.c, revision 1.1

1.1     ! root        1: 
        !             2: /*  A Bison parser, made from bi-parser.y  */
        !             3: 
        !             4: #define YYBISON 1  /* Identify Bison output.  */
        !             5: 
        !             6: #define        DEFOP   258
        !             7: #define        STRING  259
        !             8: 
        !             9: #line 21 "bi-parser.y"
        !            10: 
        !            11: 
        !            12: #include <stdio.h>
        !            13: #include "hconfig.h"
        !            14: #include "bi-defs.h"
        !            15: 
        !            16: extern char yytext[];
        !            17: extern int yyleng;
        !            18: 
        !            19: 
        !            20: /* Chain of all defs built by the parser. */
        !            21: struct def *defs;
        !            22: int ndefs;
        !            23: 
        !            24: static struct node *makenode ();
        !            25: static struct variation *makevar ();
        !            26: static struct def *makedef ();
        !            27: 
        !            28: void yyerror ();
        !            29: 
        !            30: 
        !            31: #line 43 "bi-parser.y"
        !            32: typedef union
        !            33: {
        !            34:   char *string;
        !            35:   struct def *def;
        !            36:   struct variation *variation;
        !            37:   struct node *node;
        !            38: } YYSTYPE;
        !            39: 
        !            40: #ifndef YYLTYPE
        !            41: typedef
        !            42:   struct yyltype
        !            43:     {
        !            44:       int timestamp;
        !            45:       int first_line;
        !            46:       int first_column;
        !            47:       int last_line;
        !            48:       int last_column;
        !            49:       char *text;
        !            50:    }
        !            51:   yyltype;
        !            52: 
        !            53: #define YYLTYPE yyltype
        !            54: #endif
        !            55: 
        !            56: #include <stdio.h>
        !            57: 
        !            58: #ifndef __STDC__
        !            59: #define const
        !            60: #endif
        !            61: 
        !            62: 
        !            63: 
        !            64: #define        YYFINAL         39
        !            65: #define        YYFLAG          -32768
        !            66: #define        YYNTBASE        8
        !            67: 
        !            68: #define YYTRANSLATE(x) ((unsigned)(x) <= 259 ? yytranslate[x] : 17)
        !            69: 
        !            70: static const char yytranslate[] = {     0,
        !            71:      2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
        !            72:      2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
        !            73:      2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
        !            74:      2,     2,     2,     2,     2,     2,     2,     2,     2,     5,
        !            75:      7,     2,     2,     6,     2,     2,     2,     2,     2,     2,
        !            76:      2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
        !            77:      2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
        !            78:      2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
        !            79:      2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
        !            80:      2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
        !            81:      2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
        !            82:      2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
        !            83:      2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
        !            84:      2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
        !            85:      2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
        !            86:      2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
        !            87:      2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
        !            88:      2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
        !            89:      2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
        !            90:      2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
        !            91:      2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
        !            92:      2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
        !            93:      2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
        !            94:      2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
        !            95:      2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
        !            96:      2,     2,     2,     2,     2,     1,     2,     3,     4
        !            97: };
        !            98: 
        !            99: static const short yyprhs[] = {     0,
        !           100:      0,     2,     4,     7,    18,    20,    24,    28,    34,    42,
        !           101:     52,    53,    55,    59,    60,    62,    66
        !           102: };
        !           103: 
        !           104: static const short yyrhs[] = {     9,
        !           105:      0,    10,     0,     9,    10,     0,     3,     5,     4,     6,
        !           106:     13,     6,     5,    11,     7,     7,     0,    12,     0,    11,
        !           107:      6,    12,     0,     5,    13,     7,     0,     5,    13,     6,
        !           108:     14,     7,     0,     5,    13,     6,    14,     6,    14,     7,
        !           109:      0,     5,    13,     6,    14,     6,    14,     6,    14,     7,
        !           110:      0,     0,     4,     0,     5,    15,     7,     0,     0,    16,
        !           111:      0,    16,     6,    15,     0,     4,     0
        !           112: };
        !           113: 
        !           114: #if YYDEBUG != 0
        !           115: static const short yyrline[] = { 0,
        !           116:     59,    64,    66,    70,    75,    77,    81,    84,    86,    88,
        !           117:     92,    94,    97,   100,   104,   107,   111
        !           118: };
        !           119: 
        !           120: static const char * const yytname[] = {   "$","error","$illegal.","DEFOP","STRING",
        !           121: "'('","','","')'","top","defs","def","variations","variation","opt_string","list",
        !           122: "items","item",""
        !           123: };
        !           124: #endif
        !           125: 
        !           126: static const short yyr1[] = {     0,
        !           127:      8,     9,     9,    10,    11,    11,    12,    12,    12,    12,
        !           128:     13,    13,    14,    14,    15,    15,    16
        !           129: };
        !           130: 
        !           131: static const short yyr2[] = {     0,
        !           132:      1,     1,     2,    10,     1,     3,     3,     5,     7,     9,
        !           133:      0,     1,     3,     0,     1,     3,     1
        !           134: };
        !           135: 
        !           136: static const short yydefact[] = {     0,
        !           137:      0,     1,     2,     0,     3,     0,    11,    12,     0,     0,
        !           138:      0,    11,     0,     5,     0,     0,     0,    14,     7,     6,
        !           139:      4,     0,     0,    17,     0,    15,    14,     8,    13,     0,
        !           140:      0,    16,    14,     9,     0,    10,     0,     0,     0
        !           141: };
        !           142: 
        !           143: static const short yydefgoto[] = {    37,
        !           144:      2,     3,    13,    14,     9,    23,    25,    26
        !           145: };
        !           146: 
        !           147: static const short yypact[] = {     2,
        !           148:      6,     2,-32768,     8,-32768,     7,    10,-32768,     9,    11,
        !           149:     12,    10,    -5,-32768,    -3,    12,    13,    14,-32768,-32768,
        !           150: -32768,    17,     1,-32768,    15,    18,    14,-32768,-32768,    17,
        !           151:      3,-32768,    14,-32768,    16,-32768,    25,    26,-32768
        !           152: };
        !           153: 
        !           154: static const short yypgoto[] = {-32768,
        !           155: -32768,    27,-32768,    19,    20,   -27,   -12,-32768
        !           156: };
        !           157: 
        !           158: 
        !           159: #define        YYLAST          35
        !           160: 
        !           161: 
        !           162: static const short yytable[] = {    31,
        !           163:     16,    17,    18,    19,     1,    35,    27,    28,    33,    34,
        !           164:      4,     6,     7,     8,    10,    11,    12,    32,    22,    21,
        !           165:     24,    29,    36,    30,    38,    39,     0,     0,     5,     0,
        !           166:      0,    15,     0,     0,    20
        !           167: };
        !           168: 
        !           169: static const short yycheck[] = {    27,
        !           170:      6,     7,     6,     7,     3,    33,     6,     7,     6,     7,
        !           171:      5,     4,     6,     4,     6,     5,     5,    30,     5,     7,
        !           172:      4,     7,     7,     6,     0,     0,    -1,    -1,     2,    -1,
        !           173:     -1,    12,    -1,    -1,    16
        !           174: };
        !           175: /* -*-C-*-  Note some compilers choke on comments on `#line' lines.  */
        !           176: #line 3 "bison.simple"
        !           177: 
        !           178: /* Skeleton output parser for bison,
        !           179:    Copyright (C) 1984, 1989, 1990 Bob Corbett and Richard Stallman
        !           180: 
        !           181:    This program is free software; you can redistribute it and/or modify
        !           182:    it under the terms of the GNU General Public License as published by
        !           183:    the Free Software Foundation; either version 1, or (at your option)
        !           184:    any later version.
        !           185: 
        !           186:    This program is distributed in the hope that it will be useful,
        !           187:    but WITHOUT ANY WARRANTY; without even the implied warranty of
        !           188:    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        !           189:    GNU General Public License for more details.
        !           190: 
        !           191:    You should have received a copy of the GNU General Public License
        !           192:    along with this program; if not, write to the Free Software
        !           193:    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
        !           194: 
        !           195: 
        !           196: #ifndef alloca
        !           197: #ifdef __GNUC__
        !           198: #define alloca __builtin_alloca
        !           199: #else /* not GNU C.  */
        !           200: #if (!defined (__STDC__) && defined (sparc)) || defined (__sparc__) || defined (__sparc) || defined (__sgi)
        !           201: #include <alloca.h>
        !           202: #else /* not sparc */
        !           203: #if defined (MSDOS) && !defined (__TURBOC__)
        !           204: #include <malloc.h>
        !           205: #else /* not MSDOS, or __TURBOC__ */
        !           206: #if defined(_AIX)
        !           207: #include <malloc.h>
        !           208:  #pragma alloca
        !           209: #else /* not MSDOS, __TURBOC__, or _AIX */
        !           210: #ifdef __hpux
        !           211: #ifdef __cplusplus
        !           212: extern "C" {
        !           213: void *alloca (unsigned int);
        !           214: };
        !           215: #else /* not __cplusplus */
        !           216: void *alloca ();
        !           217: #endif /* not __cplusplus */
        !           218: #endif /* __hpux */
        !           219: #endif /* not _AIX */
        !           220: #endif /* not MSDOS, or __TURBOC__ */
        !           221: #endif /* not sparc.  */
        !           222: #endif /* not GNU C.  */
        !           223: #endif /* alloca not defined.  */
        !           224: 
        !           225: /* This is the parser code that is written into each bison parser
        !           226:   when the %semantic_parser declaration is not specified in the grammar.
        !           227:   It was written by Richard Stallman by simplifying the hairy parser
        !           228:   used when %semantic_parser is specified.  */
        !           229: 
        !           230: /* Note: there must be only one dollar sign in this file.
        !           231:    It is replaced by the list of actions, each action
        !           232:    as one case of the switch.  */
        !           233: 
        !           234: #define yyerrok                (yyerrstatus = 0)
        !           235: #define yyclearin      (yychar = YYEMPTY)
        !           236: #define YYEMPTY                -2
        !           237: #define YYEOF          0
        !           238: #define YYACCEPT       return(0)
        !           239: #define YYABORT        return(1)
        !           240: #define YYERROR                goto yyerrlab1
        !           241: /* Like YYERROR except do call yyerror.
        !           242:    This remains here temporarily to ease the
        !           243:    transition to the new meaning of YYERROR, for GCC.
        !           244:    Once GCC version 2 has supplanted version 1, this can go.  */
        !           245: #define YYFAIL         goto yyerrlab
        !           246: #define YYRECOVERING()  (!!yyerrstatus)
        !           247: #define YYBACKUP(token, value) \
        !           248: do                                                             \
        !           249:   if (yychar == YYEMPTY && yylen == 1)                         \
        !           250:     { yychar = (token), yylval = (value);                      \
        !           251:       yychar1 = YYTRANSLATE (yychar);                          \
        !           252:       YYPOPSTACK;                                              \
        !           253:       goto yybackup;                                           \
        !           254:     }                                                          \
        !           255:   else                                                         \
        !           256:     { yyerror ("syntax error: cannot back up"); YYERROR; }     \
        !           257: while (0)
        !           258: 
        !           259: #define YYTERROR       1
        !           260: #define YYERRCODE      256
        !           261: 
        !           262: #ifndef YYPURE
        !           263: #define YYLEX          yylex()
        !           264: #endif
        !           265: 
        !           266: #ifdef YYPURE
        !           267: #ifdef YYLSP_NEEDED
        !           268: #define YYLEX          yylex(&yylval, &yylloc)
        !           269: #else
        !           270: #define YYLEX          yylex(&yylval)
        !           271: #endif
        !           272: #endif
        !           273: 
        !           274: /* If nonreentrant, generate the variables here */
        !           275: 
        !           276: #ifndef YYPURE
        !           277: 
        !           278: int    yychar;                 /*  the lookahead symbol                */
        !           279: YYSTYPE        yylval;                 /*  the semantic value of the           */
        !           280:                                /*  lookahead symbol                    */
        !           281: 
        !           282: #ifdef YYLSP_NEEDED
        !           283: YYLTYPE yylloc;                        /*  location data for the lookahead     */
        !           284:                                /*  symbol                              */
        !           285: #endif
        !           286: 
        !           287: int yynerrs;                   /*  number of parse errors so far       */
        !           288: #endif  /* not YYPURE */
        !           289: 
        !           290: #if YYDEBUG != 0
        !           291: int yydebug;                   /*  nonzero means print parse trace     */
        !           292: /* Since this is uninitialized, it does not stop multiple parsers
        !           293:    from coexisting.  */
        !           294: #endif
        !           295: 
        !           296: /*  YYINITDEPTH indicates the initial size of the parser's stacks      */
        !           297: 
        !           298: #ifndef        YYINITDEPTH
        !           299: #define YYINITDEPTH 200
        !           300: #endif
        !           301: 
        !           302: /*  YYMAXDEPTH is the maximum size the stacks can grow to
        !           303:     (effective only if the built-in stack extension method is used).  */
        !           304: 
        !           305: #if YYMAXDEPTH == 0
        !           306: #undef YYMAXDEPTH
        !           307: #endif
        !           308: 
        !           309: #ifndef YYMAXDEPTH
        !           310: #define YYMAXDEPTH 10000
        !           311: #endif
        !           312: 
        !           313: /* Prevent warning if -Wstrict-prototypes.  */
        !           314: #ifdef __GNUC__
        !           315: int yyparse (void);
        !           316: #endif
        !           317: 
        !           318: #if __GNUC__ > 1               /* GNU C and GNU C++ define this.  */
        !           319: #define __yy_bcopy(FROM,TO,COUNT)      __builtin_memcpy(TO,FROM,COUNT)
        !           320: #else                          /* not GNU C or C++ */
        !           321: #ifndef __cplusplus
        !           322: 
        !           323: /* This is the most reliable way to avoid incompatibilities
        !           324:    in available built-in functions on various systems.  */
        !           325: static void
        !           326: __yy_bcopy (from, to, count)
        !           327:      char *from;
        !           328:      char *to;
        !           329:      int count;
        !           330: {
        !           331:   register char *f = from;
        !           332:   register char *t = to;
        !           333:   register int i = count;
        !           334: 
        !           335:   while (i-- > 0)
        !           336:     *t++ = *f++;
        !           337: }
        !           338: 
        !           339: #else /* __cplusplus */
        !           340: 
        !           341: /* This is the most reliable way to avoid incompatibilities
        !           342:    in available built-in functions on various systems.  */
        !           343: static void
        !           344: __yy_bcopy (char *from, char *to, int count)
        !           345: {
        !           346:   register char *f = from;
        !           347:   register char *t = to;
        !           348:   register int i = count;
        !           349: 
        !           350:   while (i-- > 0)
        !           351:     *t++ = *f++;
        !           352: }
        !           353: 
        !           354: #endif
        !           355: #endif
        !           356: 
        !           357: #line 184 "bison.simple"
        !           358: 
        !           359: /* The user can define YYPARSE_PARAM as the name of an argument to be passed
        !           360:    into yyparse.  The argument should have type void *.
        !           361:    It should actually point to an object.
        !           362:    Grammar actions can access the variable by casting it
        !           363:    to the proper pointer type.  */
        !           364: 
        !           365: #ifdef YYPARSE_PARAM
        !           366: #define YYPARSE_PARAM_DECL void *YYPARSE_PARAM;
        !           367: #else
        !           368: #define YYPARSE_PARAM
        !           369: #define YYPARSE_PARAM_DECL
        !           370: #endif
        !           371: 
        !           372: int
        !           373: yyparse(YYPARSE_PARAM)
        !           374:      YYPARSE_PARAM_DECL
        !           375: {
        !           376:   register int yystate;
        !           377:   register int yyn;
        !           378:   register short *yyssp;
        !           379:   register YYSTYPE *yyvsp;
        !           380:   int yyerrstatus;     /*  number of tokens to shift before error messages enabled */
        !           381:   int yychar1 = 0;             /*  lookahead token as an internal (translated) token number */
        !           382: 
        !           383:   short        yyssa[YYINITDEPTH];     /*  the state stack                     */
        !           384:   YYSTYPE yyvsa[YYINITDEPTH];  /*  the semantic value stack            */
        !           385: 
        !           386:   short *yyss = yyssa;         /*  refer to the stacks thru separate pointers */
        !           387:   YYSTYPE *yyvs = yyvsa;       /*  to allow yyoverflow to reallocate them elsewhere */
        !           388: 
        !           389: #ifdef YYLSP_NEEDED
        !           390:   YYLTYPE yylsa[YYINITDEPTH];  /*  the location stack                  */
        !           391:   YYLTYPE *yyls = yylsa;
        !           392:   YYLTYPE *yylsp;
        !           393: 
        !           394: #define YYPOPSTACK   (yyvsp--, yyssp--, yylsp--)
        !           395: #else
        !           396: #define YYPOPSTACK   (yyvsp--, yyssp--)
        !           397: #endif
        !           398: 
        !           399:   int yystacksize = YYINITDEPTH;
        !           400: 
        !           401: #ifdef YYPURE
        !           402:   int yychar;
        !           403:   YYSTYPE yylval;
        !           404:   int yynerrs;
        !           405: #ifdef YYLSP_NEEDED
        !           406:   YYLTYPE yylloc;
        !           407: #endif
        !           408: #endif
        !           409: 
        !           410:   YYSTYPE yyval;               /*  the variable used to return         */
        !           411:                                /*  semantic values from the action     */
        !           412:                                /*  routines                            */
        !           413: 
        !           414:   int yylen;
        !           415: 
        !           416: #if YYDEBUG != 0
        !           417:   if (yydebug)
        !           418:     fprintf(stderr, "Starting parse\n");
        !           419: #endif
        !           420: 
        !           421:   yystate = 0;
        !           422:   yyerrstatus = 0;
        !           423:   yynerrs = 0;
        !           424:   yychar = YYEMPTY;            /* Cause a token to be read.  */
        !           425: 
        !           426:   /* Initialize stack pointers.
        !           427:      Waste one element of value and location stack
        !           428:      so that they stay on the same level as the state stack.
        !           429:      The wasted elements are never initialized.  */
        !           430: 
        !           431:   yyssp = yyss - 1;
        !           432:   yyvsp = yyvs;
        !           433: #ifdef YYLSP_NEEDED
        !           434:   yylsp = yyls;
        !           435: #endif
        !           436: 
        !           437: /* Push a new state, which is found in  yystate  .  */
        !           438: /* In all cases, when you get here, the value and location stacks
        !           439:    have just been pushed. so pushing a state here evens the stacks.  */
        !           440: yynewstate:
        !           441: 
        !           442:   *++yyssp = yystate;
        !           443: 
        !           444:   if (yyssp >= yyss + yystacksize - 1)
        !           445:     {
        !           446:       /* Give user a chance to reallocate the stack */
        !           447:       /* Use copies of these so that the &'s don't force the real ones into memory. */
        !           448:       YYSTYPE *yyvs1 = yyvs;
        !           449:       short *yyss1 = yyss;
        !           450: #ifdef YYLSP_NEEDED
        !           451:       YYLTYPE *yyls1 = yyls;
        !           452: #endif
        !           453: 
        !           454:       /* Get the current used size of the three stacks, in elements.  */
        !           455:       int size = yyssp - yyss + 1;
        !           456: 
        !           457: #ifdef yyoverflow
        !           458:       /* Each stack pointer address is followed by the size of
        !           459:         the data in use in that stack, in bytes.  */
        !           460: #ifdef YYLSP_NEEDED
        !           461:       /* This used to be a conditional around just the two extra args,
        !           462:         but that might be undefined if yyoverflow is a macro.  */
        !           463:       yyoverflow("parser stack overflow",
        !           464:                 &yyss1, size * sizeof (*yyssp),
        !           465:                 &yyvs1, size * sizeof (*yyvsp),
        !           466:                 &yyls1, size * sizeof (*yylsp),
        !           467:                 &yystacksize);
        !           468: #else
        !           469:       yyoverflow("parser stack overflow",
        !           470:                 &yyss1, size * sizeof (*yyssp),
        !           471:                 &yyvs1, size * sizeof (*yyvsp),
        !           472:                 &yystacksize);
        !           473: #endif
        !           474: 
        !           475:       yyss = yyss1; yyvs = yyvs1;
        !           476: #ifdef YYLSP_NEEDED
        !           477:       yyls = yyls1;
        !           478: #endif
        !           479: #else /* no yyoverflow */
        !           480:       /* Extend the stack our own way.  */
        !           481:       if (yystacksize >= YYMAXDEPTH)
        !           482:        {
        !           483:          yyerror("parser stack overflow");
        !           484:          return 2;
        !           485:        }
        !           486:       yystacksize *= 2;
        !           487:       if (yystacksize > YYMAXDEPTH)
        !           488:        yystacksize = YYMAXDEPTH;
        !           489:       yyss = (short *) alloca (yystacksize * sizeof (*yyssp));
        !           490:       __yy_bcopy ((char *)yyss1, (char *)yyss, size * sizeof (*yyssp));
        !           491:       yyvs = (YYSTYPE *) alloca (yystacksize * sizeof (*yyvsp));
        !           492:       __yy_bcopy ((char *)yyvs1, (char *)yyvs, size * sizeof (*yyvsp));
        !           493: #ifdef YYLSP_NEEDED
        !           494:       yyls = (YYLTYPE *) alloca (yystacksize * sizeof (*yylsp));
        !           495:       __yy_bcopy ((char *)yyls1, (char *)yyls, size * sizeof (*yylsp));
        !           496: #endif
        !           497: #endif /* no yyoverflow */
        !           498: 
        !           499:       yyssp = yyss + size - 1;
        !           500:       yyvsp = yyvs + size - 1;
        !           501: #ifdef YYLSP_NEEDED
        !           502:       yylsp = yyls + size - 1;
        !           503: #endif
        !           504: 
        !           505: #if YYDEBUG != 0
        !           506:       if (yydebug)
        !           507:        fprintf(stderr, "Stack size increased to %d\n", yystacksize);
        !           508: #endif
        !           509: 
        !           510:       if (yyssp >= yyss + yystacksize - 1)
        !           511:        YYABORT;
        !           512:     }
        !           513: 
        !           514: #if YYDEBUG != 0
        !           515:   if (yydebug)
        !           516:     fprintf(stderr, "Entering state %d\n", yystate);
        !           517: #endif
        !           518: 
        !           519:   goto yybackup;
        !           520:  yybackup:
        !           521: 
        !           522: /* Do appropriate processing given the current state.  */
        !           523: /* Read a lookahead token if we need one and don't already have one.  */
        !           524: /* yyresume: */
        !           525: 
        !           526:   /* First try to decide what to do without reference to lookahead token.  */
        !           527: 
        !           528:   yyn = yypact[yystate];
        !           529:   if (yyn == YYFLAG)
        !           530:     goto yydefault;
        !           531: 
        !           532:   /* Not known => get a lookahead token if don't already have one.  */
        !           533: 
        !           534:   /* yychar is either YYEMPTY or YYEOF
        !           535:      or a valid token in external form.  */
        !           536: 
        !           537:   if (yychar == YYEMPTY)
        !           538:     {
        !           539: #if YYDEBUG != 0
        !           540:       if (yydebug)
        !           541:        fprintf(stderr, "Reading a token: ");
        !           542: #endif
        !           543:       yychar = YYLEX;
        !           544:     }
        !           545: 
        !           546:   /* Convert token to internal form (in yychar1) for indexing tables with */
        !           547: 
        !           548:   if (yychar <= 0)             /* This means end of input. */
        !           549:     {
        !           550:       yychar1 = 0;
        !           551:       yychar = YYEOF;          /* Don't call YYLEX any more */
        !           552: 
        !           553: #if YYDEBUG != 0
        !           554:       if (yydebug)
        !           555:        fprintf(stderr, "Now at end of input.\n");
        !           556: #endif
        !           557:     }
        !           558:   else
        !           559:     {
        !           560:       yychar1 = YYTRANSLATE(yychar);
        !           561: 
        !           562: #if YYDEBUG != 0
        !           563:       if (yydebug)
        !           564:        {
        !           565:          fprintf (stderr, "Next token is %d (%s", yychar, yytname[yychar1]);
        !           566:          /* Give the individual parser a way to print the precise meaning
        !           567:             of a token, for further debugging info.  */
        !           568: #ifdef YYPRINT
        !           569:          YYPRINT (stderr, yychar, yylval);
        !           570: #endif
        !           571:          fprintf (stderr, ")\n");
        !           572:        }
        !           573: #endif
        !           574:     }
        !           575: 
        !           576:   yyn += yychar1;
        !           577:   if (yyn < 0 || yyn > YYLAST || yycheck[yyn] != yychar1)
        !           578:     goto yydefault;
        !           579: 
        !           580:   yyn = yytable[yyn];
        !           581: 
        !           582:   /* yyn is what to do for this token type in this state.
        !           583:      Negative => reduce, -yyn is rule number.
        !           584:      Positive => shift, yyn is new state.
        !           585:        New state is final state => don't bother to shift,
        !           586:        just return success.
        !           587:      0, or most negative number => error.  */
        !           588: 
        !           589:   if (yyn < 0)
        !           590:     {
        !           591:       if (yyn == YYFLAG)
        !           592:        goto yyerrlab;
        !           593:       yyn = -yyn;
        !           594:       goto yyreduce;
        !           595:     }
        !           596:   else if (yyn == 0)
        !           597:     goto yyerrlab;
        !           598: 
        !           599:   if (yyn == YYFINAL)
        !           600:     YYACCEPT;
        !           601: 
        !           602:   /* Shift the lookahead token.  */
        !           603: 
        !           604: #if YYDEBUG != 0
        !           605:   if (yydebug)
        !           606:     fprintf(stderr, "Shifting token %d (%s), ", yychar, yytname[yychar1]);
        !           607: #endif
        !           608: 
        !           609:   /* Discard the token being shifted unless it is eof.  */
        !           610:   if (yychar != YYEOF)
        !           611:     yychar = YYEMPTY;
        !           612: 
        !           613:   *++yyvsp = yylval;
        !           614: #ifdef YYLSP_NEEDED
        !           615:   *++yylsp = yylloc;
        !           616: #endif
        !           617: 
        !           618:   /* count tokens shifted since error; after three, turn off error status.  */
        !           619:   if (yyerrstatus) yyerrstatus--;
        !           620: 
        !           621:   yystate = yyn;
        !           622:   goto yynewstate;
        !           623: 
        !           624: /* Do the default action for the current state.  */
        !           625: yydefault:
        !           626: 
        !           627:   yyn = yydefact[yystate];
        !           628:   if (yyn == 0)
        !           629:     goto yyerrlab;
        !           630: 
        !           631: /* Do a reduction.  yyn is the number of a rule to reduce with.  */
        !           632: yyreduce:
        !           633:   yylen = yyr2[yyn];
        !           634:   if (yylen > 0)
        !           635:     yyval = yyvsp[1-yylen]; /* implement default value of the action */
        !           636: 
        !           637: #if YYDEBUG != 0
        !           638:   if (yydebug)
        !           639:     {
        !           640:       int i;
        !           641: 
        !           642:       fprintf (stderr, "Reducing via rule %d (line %d), ",
        !           643:               yyn, yyrline[yyn]);
        !           644: 
        !           645:       /* Print the symbols being reduced, and their result.  */
        !           646:       for (i = yyprhs[yyn]; yyrhs[i] > 0; i++)
        !           647:        fprintf (stderr, "%s ", yytname[yyrhs[i]]);
        !           648:       fprintf (stderr, " -> %s\n", yytname[yyr1[yyn]]);
        !           649:     }
        !           650: #endif
        !           651: 
        !           652: 
        !           653:   switch (yyn) {
        !           654: 
        !           655: case 1:
        !           656: #line 61 "bi-parser.y"
        !           657: { defs = yyvsp[0].def; ;
        !           658:     break;}
        !           659: case 3:
        !           660: #line 67 "bi-parser.y"
        !           661: { yyvsp[0].def->next = yyvsp[-1].def; yyval.def = yyvsp[0].def; ;
        !           662:     break;}
        !           663: case 4:
        !           664: #line 72 "bi-parser.y"
        !           665: { yyval.def = makedef (yyvsp[-7].string, yyvsp[-5].string, yyvsp[-2].variation); ;
        !           666:     break;}
        !           667: case 6:
        !           668: #line 78 "bi-parser.y"
        !           669: { yyvsp[0].variation->next = yyvsp[-2].variation; yyval.variation = yyvsp[0].variation; ;
        !           670:     break;}
        !           671: case 7:
        !           672: #line 83 "bi-parser.y"
        !           673: { yyval.variation = makevar (yyvsp[-1].string, (struct node *) NULL, (struct node *) NULL, (struct node *) NULL); ;
        !           674:     break;}
        !           675: case 8:
        !           676: #line 85 "bi-parser.y"
        !           677: { yyval.variation = makevar (yyvsp[-3].string, yyvsp[-1].node, (struct node *) NULL, (struct node *) NULL); ;
        !           678:     break;}
        !           679: case 9:
        !           680: #line 87 "bi-parser.y"
        !           681: { yyval.variation = makevar (yyvsp[-5].string, yyvsp[-3].node, yyvsp[-1].node, (struct node *) NULL); ;
        !           682:     break;}
        !           683: case 10:
        !           684: #line 89 "bi-parser.y"
        !           685: { yyval.variation = makevar (yyvsp[-7].string, yyvsp[-5].node, yyvsp[-3].node, yyvsp[-1].node); ;
        !           686:     break;}
        !           687: case 11:
        !           688: #line 93 "bi-parser.y"
        !           689: { yyval.string = ""; ;
        !           690:     break;}
        !           691: case 12:
        !           692: #line 94 "bi-parser.y"
        !           693: { yyval.string = yyvsp[0].string; ;
        !           694:     break;}
        !           695: case 13:
        !           696: #line 99 "bi-parser.y"
        !           697: { yyval.node = yyvsp[-1].node; ;
        !           698:     break;}
        !           699: case 14:
        !           700: #line 101 "bi-parser.y"
        !           701: { yyval.node = NULL; ;
        !           702:     break;}
        !           703: case 16:
        !           704: #line 108 "bi-parser.y"
        !           705: { yyvsp[-2].node->next = yyvsp[0].node; yyval.node = yyvsp[-2].node; ;
        !           706:     break;}
        !           707: case 17:
        !           708: #line 113 "bi-parser.y"
        !           709: { yyval.node = makenode (yyvsp[0].string); ;
        !           710:     break;}
        !           711: }
        !           712:    /* the action file gets copied in in place of this dollarsign */
        !           713: #line 480 "bison.simple"
        !           714: 
        !           715:   yyvsp -= yylen;
        !           716:   yyssp -= yylen;
        !           717: #ifdef YYLSP_NEEDED
        !           718:   yylsp -= yylen;
        !           719: #endif
        !           720: 
        !           721: #if YYDEBUG != 0
        !           722:   if (yydebug)
        !           723:     {
        !           724:       short *ssp1 = yyss - 1;
        !           725:       fprintf (stderr, "state stack now");
        !           726:       while (ssp1 != yyssp)
        !           727:        fprintf (stderr, " %d", *++ssp1);
        !           728:       fprintf (stderr, "\n");
        !           729:     }
        !           730: #endif
        !           731: 
        !           732:   *++yyvsp = yyval;
        !           733: 
        !           734: #ifdef YYLSP_NEEDED
        !           735:   yylsp++;
        !           736:   if (yylen == 0)
        !           737:     {
        !           738:       yylsp->first_line = yylloc.first_line;
        !           739:       yylsp->first_column = yylloc.first_column;
        !           740:       yylsp->last_line = (yylsp-1)->last_line;
        !           741:       yylsp->last_column = (yylsp-1)->last_column;
        !           742:       yylsp->text = 0;
        !           743:     }
        !           744:   else
        !           745:     {
        !           746:       yylsp->last_line = (yylsp+yylen-1)->last_line;
        !           747:       yylsp->last_column = (yylsp+yylen-1)->last_column;
        !           748:     }
        !           749: #endif
        !           750: 
        !           751:   /* Now "shift" the result of the reduction.
        !           752:      Determine what state that goes to,
        !           753:      based on the state we popped back to
        !           754:      and the rule number reduced by.  */
        !           755: 
        !           756:   yyn = yyr1[yyn];
        !           757: 
        !           758:   yystate = yypgoto[yyn - YYNTBASE] + *yyssp;
        !           759:   if (yystate >= 0 && yystate <= YYLAST && yycheck[yystate] == *yyssp)
        !           760:     yystate = yytable[yystate];
        !           761:   else
        !           762:     yystate = yydefgoto[yyn - YYNTBASE];
        !           763: 
        !           764:   goto yynewstate;
        !           765: 
        !           766: yyerrlab:   /* here on detecting error */
        !           767: 
        !           768:   if (! yyerrstatus)
        !           769:     /* If not already recovering from an error, report this error.  */
        !           770:     {
        !           771:       ++yynerrs;
        !           772: 
        !           773: #ifdef YYERROR_VERBOSE
        !           774:       yyn = yypact[yystate];
        !           775: 
        !           776:       if (yyn > YYFLAG && yyn < YYLAST)
        !           777:        {
        !           778:          int size = 0;
        !           779:          char *msg;
        !           780:          int x, count;
        !           781: 
        !           782:          count = 0;
        !           783:          /* Start X at -yyn if nec to avoid negative indexes in yycheck.  */
        !           784:          for (x = (yyn < 0 ? -yyn : 0);
        !           785:               x < (sizeof(yytname) / sizeof(char *)); x++)
        !           786:            if (yycheck[x + yyn] == x)
        !           787:              size += strlen(yytname[x]) + 15, count++;
        !           788:          msg = (char *) malloc(size + 15);
        !           789:          if (msg != 0)
        !           790:            {
        !           791:              strcpy(msg, "parse error");
        !           792: 
        !           793:              if (count < 5)
        !           794:                {
        !           795:                  count = 0;
        !           796:                  for (x = (yyn < 0 ? -yyn : 0);
        !           797:                       x < (sizeof(yytname) / sizeof(char *)); x++)
        !           798:                    if (yycheck[x + yyn] == x)
        !           799:                      {
        !           800:                        strcat(msg, count == 0 ? ", expecting `" : " or `");
        !           801:                        strcat(msg, yytname[x]);
        !           802:                        strcat(msg, "'");
        !           803:                        count++;
        !           804:                      }
        !           805:                }
        !           806:              yyerror(msg);
        !           807:              free(msg);
        !           808:            }
        !           809:          else
        !           810:            yyerror ("parse error; also virtual memory exceeded");
        !           811:        }
        !           812:       else
        !           813: #endif /* YYERROR_VERBOSE */
        !           814:        yyerror("parse error");
        !           815:     }
        !           816: 
        !           817:   goto yyerrlab1;
        !           818: yyerrlab1:   /* here on error raised explicitly by an action */
        !           819: 
        !           820:   if (yyerrstatus == 3)
        !           821:     {
        !           822:       /* if just tried and failed to reuse lookahead token after an error, discard it.  */
        !           823: 
        !           824:       /* return failure if at end of input */
        !           825:       if (yychar == YYEOF)
        !           826:        YYABORT;
        !           827: 
        !           828: #if YYDEBUG != 0
        !           829:       if (yydebug)
        !           830:        fprintf(stderr, "Discarding token %d (%s).\n", yychar, yytname[yychar1]);
        !           831: #endif
        !           832: 
        !           833:       yychar = YYEMPTY;
        !           834:     }
        !           835: 
        !           836:   /* Else will try to reuse lookahead token
        !           837:      after shifting the error token.  */
        !           838: 
        !           839:   yyerrstatus = 3;             /* Each real token shifted decrements this */
        !           840: 
        !           841:   goto yyerrhandle;
        !           842: 
        !           843: yyerrdefault:  /* current state does not do anything special for the error token. */
        !           844: 
        !           845: #if 0
        !           846:   /* This is wrong; only states that explicitly want error tokens
        !           847:      should shift them.  */
        !           848:   yyn = yydefact[yystate];  /* If its default is to accept any token, ok.  Otherwise pop it.*/
        !           849:   if (yyn) goto yydefault;
        !           850: #endif
        !           851: 
        !           852: yyerrpop:   /* pop the current state because it cannot handle the error token */
        !           853: 
        !           854:   if (yyssp == yyss) YYABORT;
        !           855:   yyvsp--;
        !           856:   yystate = *--yyssp;
        !           857: #ifdef YYLSP_NEEDED
        !           858:   yylsp--;
        !           859: #endif
        !           860: 
        !           861: #if YYDEBUG != 0
        !           862:   if (yydebug)
        !           863:     {
        !           864:       short *ssp1 = yyss - 1;
        !           865:       fprintf (stderr, "Error: state stack now");
        !           866:       while (ssp1 != yyssp)
        !           867:        fprintf (stderr, " %d", *++ssp1);
        !           868:       fprintf (stderr, "\n");
        !           869:     }
        !           870: #endif
        !           871: 
        !           872: yyerrhandle:
        !           873: 
        !           874:   yyn = yypact[yystate];
        !           875:   if (yyn == YYFLAG)
        !           876:     goto yyerrdefault;
        !           877: 
        !           878:   yyn += YYTERROR;
        !           879:   if (yyn < 0 || yyn > YYLAST || yycheck[yyn] != YYTERROR)
        !           880:     goto yyerrdefault;
        !           881: 
        !           882:   yyn = yytable[yyn];
        !           883:   if (yyn < 0)
        !           884:     {
        !           885:       if (yyn == YYFLAG)
        !           886:        goto yyerrpop;
        !           887:       yyn = -yyn;
        !           888:       goto yyreduce;
        !           889:     }
        !           890:   else if (yyn == 0)
        !           891:     goto yyerrpop;
        !           892: 
        !           893:   if (yyn == YYFINAL)
        !           894:     YYACCEPT;
        !           895: 
        !           896: #if YYDEBUG != 0
        !           897:   if (yydebug)
        !           898:     fprintf(stderr, "Shifting error token, ");
        !           899: #endif
        !           900: 
        !           901:   *++yyvsp = yylval;
        !           902: #ifdef YYLSP_NEEDED
        !           903:   *++yylsp = yylloc;
        !           904: #endif
        !           905: 
        !           906:   yystate = yyn;
        !           907:   goto yynewstate;
        !           908: }
        !           909: #line 116 "bi-parser.y"
        !           910: 
        !           911: 
        !           912: static struct node *
        !           913: makenode (s)
        !           914:      char *s;
        !           915: {
        !           916:   struct node *n;
        !           917: 
        !           918:   n = (struct node *) malloc (sizeof (struct node));
        !           919:   n->text = s;
        !           920:   n->next = NULL;
        !           921:   return n;
        !           922: }
        !           923: 
        !           924: static struct variation *
        !           925: makevar (name, inputs, outputs, literals)
        !           926:      char *name;
        !           927:      struct node *inputs, *outputs, *literals;
        !           928: {
        !           929:   struct variation *v;
        !           930: 
        !           931:   v = (struct variation *) malloc (sizeof (struct variation));
        !           932:   v->name = name;
        !           933:   v->code = ndefs++;
        !           934:   v->inputs = inputs;
        !           935:   v->outputs = outputs;
        !           936:   v->literals = literals;
        !           937:   v->next = NULL;
        !           938:   return v;
        !           939: }
        !           940: 
        !           941: static struct def *
        !           942: makedef (name, template, vars)
        !           943:      char *name, *template;
        !           944:      struct variation *vars;
        !           945: {
        !           946:   struct def *d;
        !           947: 
        !           948:   d = (struct def *) malloc (sizeof (struct def));
        !           949:   d->basename = name;
        !           950:   d->template = template;
        !           951:   d->variations = vars;
        !           952:   d->next = NULL;
        !           953:   return d;
        !           954: }
        !           955: 
        !           956: void
        !           957: yyerror (s)
        !           958:      char *s;
        !           959: {
        !           960:   fprintf (stderr, "syntax error in input\n");
        !           961:   exit (FATAL_EXIT_CODE);
        !           962: }

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