/*
 *
 * VRML to RW converter plug-in
 */

/*  A Bison parser, made from parser.y with Bison version GNU Bison version 1.24
  */

#define YYBISON 1              /* Identify Bison output.  */

#define	IDENTIFIER	258
#define	DEF	259
#define	USE	260
#define	PROTO	261
#define	EXTERNPROTO	262
#define	TO	263
#define	IS	264
#define	ROUTE	265
#define	SFN_NULL	266
#define	EVENTIN	267
#define	EVENTOUT	268
#define	UNEXPOSEDFIELD	269
#define	EXPOSEDFIELD	270
#define	SFVRMLBool	271
#define	SFCOLOR	272
#define	SFFLOAT	273
#define	SFIMAGE	274
#define	SFINT32	275
#define	SFNODE	276
#define	SFROTATION	277
#define	SFSTRING	278
#define	SFTIME	279
#define	SFVEC2F	280
#define	SFVEC3F	281
#define	MFCOLOR	282
#define	MFFLOAT	283
#define	MFINT32	284
#define	MFROTATION	285
#define	MFSTRING	286
#define	MFVEC2F	287
#define	MFVEC3F	288
#define	MFNODE	289

/****************************************************************************
 *
 * VRML 2.0 to RW3.0 Converter
 * Copyright (C) 1997 Criterion Technologies
 *
 * Author   : Damian Scallan
 *
 * Based on original parser code by Gavin Bell & 
 * Daniel Woods (first port) of Silicon Graphics, Inc.
 *
 ****************************************************************************/

/****************************************************************************
 Includes
 */

#include <stdio.h>
#include <string.h>

#include "rpplugin.h"
#include "abstractnode.h"
#include "parser.h"
#include "symtable.h"
#include "rpvrmlanim.h"
#include "rpvrml.h"
#include "route.h"

static const char __RWUNUSED__ rcsid[] =
    "@@(#)$Id: parser.c,v 1.41 2001/08/22 19:17:35 Markj Exp $";

extern int          yylex(void);
extern void         yyerror(const char *);
extern void         yyResetLineNumber(void);

/****************************************************************************
 Local (Static) Prototypes
 */

/****************************************************************************
 Local Defines
 */

/****************************************************************************
 Globals (across program)
 */

LLStack             currentField; /* of FieldRec */
int                 parsing_proto = FALSE;
int                 parsing_script = FALSE;

/*
 *  This is used when the parser knows what kind of token it expects
 *  to get next-- used when parsing field values (whose types are declared
 *  and read by the parser) and at certain other places:
 */
extern int          expectToken;

/* Current line number (set by lexer) */
extern int          currentLineNumber;
extern RwStream    *yyin, *yyout;
extern int          yy_flex_debug;

/****************************************************************************
 Local (static) Globals
 */

/****************************************************************************
Bison Voodoo
*/

typedef union
{
    char               *string;
    AbstractNode       *aNode;
}
YYSTYPE;

#ifndef YYLTYPE
typedef struct yyltype
{
    int                 timestamp;
    int                 first_line;
    int                 first_column;
    int                 last_line;
    int                 last_column;
    char               *text;
}
yyltype;

#define YYLTYPE yyltype
#endif

#ifndef YYDEBUG
#define YYDEBUG 1
#endif

#define	YYFINAL		126
#define	YYFLAG		-32768
#define	YYNTBASE	40

#define YYTRANSLATE(x) ((unsigned)(x) <= 289 ? yytranslate[x] : 66)

static const char   yytranslate[] = { 0,
    2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
    2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
    2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
    2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
    2, 2, 2, 2, 2, 39, 2, 2, 2, 2,
    2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
    2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
    2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
    2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
    35, 2, 36, 2, 2, 2, 2, 2, 2, 2,
    2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
    2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
    2, 2, 37, 2, 38, 2, 2, 2, 2, 2,
    2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
    2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
    2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
    2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
    2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
    2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
    2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
    2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
    2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
    2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
    2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
    2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
    2, 2, 2, 2, 2, 1, 2, 3, 4, 5,
    6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
    16, 17, 18, 19, 20, 21, 22, 23, 24, 25,
    26, 27, 28, 29, 30, 31, 32, 33, 34
};

#if YYDEBUG != 0
static const short  yyprhs[] = { 0,
    0, 2, 3, 6, 8, 10, 12, 14, 18, 21,
    23, 25, 26, 36, 37, 38, 47, 48, 51, 55,
    59, 60, 66, 67, 73, 74, 77, 81, 85, 89,
    93, 102, 103, 109, 110, 113, 114, 118, 120, 122,
    126, 130, 131, 137, 143, 149, 151, 153, 155, 157,
    159, 161, 163, 165, 167, 169, 171, 173, 175, 177,
    179, 181, 183, 186, 189, 192, 195, 199, 201, 202
};

static const short  yyrhs[] = { 41,
    0, 0, 41, 42, 0, 43, 0, 44, 0, 56,
    0, 57, 0, 4, 3, 57, 0, 5, 3, 0,
    45, 0, 47, 0, 0, 6, 3, 46, 35, 50,
    36, 37, 41, 38, 0, 0, 0, 7, 3, 48,
    35, 54, 36, 49, 63, 0, 0, 50, 51, 0,
    12, 3, 3, 0, 13, 3, 3, 0, 0, 14,
    3, 3, 52, 63, 0, 0, 15, 3, 3, 53,
    63, 0, 0, 54, 55, 0, 12, 3, 3, 0,
    13, 3, 3, 0, 14, 3, 3, 0, 15, 3,
    3, 0, 10, 3, 39, 3, 8, 3, 39, 3,
    0, 0, 3, 58, 37, 59, 38, 0, 0, 59,
    60, 0, 0, 3, 61, 63, 0, 56, 0, 44,
    0, 12, 3, 3, 0, 13, 3, 3, 0, 0,
    14, 3, 3, 62, 63, 0, 12, 3, 3, 9,
    3, 0, 13, 3, 3, 9, 3, 0, 16, 0,
    17, 0, 27, 0, 18, 0, 28, 0, 19, 0,
    20, 0, 29, 0, 22, 0, 30, 0, 23, 0,
    31, 0, 24, 0, 25, 0, 32, 0, 26, 0,
    33, 0, 21, 43, 0, 21, 11, 0, 34, 64,
    0, 9, 3, 0, 35, 65, 36, 0, 43, 0,
    0, 65, 43, 0
};

#endif

#if YYDEBUG != 0
static const short  yyrline[] = { 0,
    91, 94, 96, 99, 101, 102, 105, 107, 108, 111,
    113, 116, 118, 122, 124, 127, 129, 131, 134, 137,
    139, 142, 143, 146, 149, 151, 154, 157, 159, 161,
    165, 172, 174, 177, 179, 182, 184, 185, 186, 189,
    190, 191, 195, 196, 198, 202, 204, 205, 206, 207,
    208, 209, 210, 211, 212, 213, 214, 215, 216, 217,
    218, 219, 221, 222, 223, 224, 227, 229, 232, 234
};

static const char  *const yytname[] =
    { "$", "error", "$undefined.", "IDENTIFIER",
    "DEF", "USE", "PROTO", "EXTERNPROTO", "TO", "IS", "ROUTE",
    "SFN_NULL", "EVENTIN", "EVENTOUT",
    "FIELD", "EXPOSEDFIELD", "SFVRMLBool", "SFCOLOR", "SFFLOAT",
    "SFIMAGE",
    "SFINT32", "SFNODE",
    "SFROTATION", "SFSTRING", "SFTIME", "SFVEC2F", "SFVEC3F", "MFCOLOR",
    "MFFLOAT", "MFINT32",
    "MFROTATION", "MFSTRING", "MFVEC2F", "MFVEC3F", "MFNODE", "'['",
    "']'", "'{'", "'}'",
    "'.'", "vrmlscene", "declarations", "declaration",
    "nodeDeclaration",
    "protoDeclaration",
    "proto", "@1", "externproto", "@2", "@3", "interfaceDeclarations",
    "interfaceDeclaration",
    "@4", "@5", "externInterfaceDeclarations",
    "externInterfaceDeclaration", "routeDeclaration",
    "node", "@6", "nodeGuts", "nodeGut", "@7", "@8", "fieldValue",
    "mfnodeValue", "nodes",
    ""
};

#endif

static const short  yyr1[] = { 0,
    40, 41, 41, 42, 42, 42, 43, 43, 43, 44,
    44, 46, 45, 48, 49, 47, 50, 50, 51, 51,
    52, 51, 53, 51, 54, 54, 55, 55, 55, 55,
    56, 58, 57, 59, 59, 61, 60, 60, 60, 60,
    60, 62, 60, 60, 60, 63, 63, 63, 63, 63,
    63, 63, 63, 63, 63, 63, 63, 63, 63, 63,
    63, 63, 63, 63, 63, 63, 64, 64, 65, 65
};

static const short  yyr2[] = { 0,
    1, 0, 2, 1, 1, 1, 1, 3, 2, 1,
    1, 0, 9, 0, 0, 8, 0, 2, 3, 3,
    0, 5, 0, 5, 0, 2, 3, 3, 3, 3,
    8, 0, 5, 0, 2, 0, 3, 1, 1, 3,
    3, 0, 5, 5, 5, 1, 1, 1, 1, 1,
    1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
    1, 1, 2, 2, 2, 2, 3, 1, 0, 2
};

static const short  yydefact[] = { 2,
    1, 32, 0, 0, 0, 0, 0, 3, 4, 5,
    10, 11, 6, 7, 0, 0, 9, 12, 14, 0,
    34, 8, 0, 0, 0, 0, 17, 25, 0, 36,
    0, 0, 0, 33, 39, 38, 35, 0, 0, 0,
    0, 0, 0, 0, 0, 0, 0, 0, 0, 18,
    0, 0, 0, 0, 15, 26, 0, 0, 46, 47,
    49, 51, 52, 0, 54, 56, 58, 59, 61, 48,
    50, 53, 55, 57, 60, 62, 0, 37, 40, 41,
    42, 0, 0, 0, 0, 2, 0, 0, 0, 0,
    0, 0, 66, 64, 63, 69, 68, 65, 0, 0,
    0, 19, 20, 21, 23, 0, 27, 28, 29, 30,
    16, 31, 0, 44, 45, 43, 0, 0, 13, 67,
    70, 22, 24, 0, 0, 0
};

static const short  yydefgoto[] = { 124,
    1, 8, 9, 10, 11, 23, 12, 24, 91, 38,
    50, 117, 118, 39, 56, 13, 14, 15, 26, 37,
    41, 101, 78, 98, 113
};

static const short  yypact[] = { -32768,
    79, -32768, -1, 0, 3, 4, 6, -32768, -32768, -32768,
    -32768, -32768, -32768, -32768, -23, 18, -32768, -32768, -32768,
    -10,
    -32768, -32768, 5, 7, 32, -2, -32768, -32768, 33, -32768,
    40, 41, 45, -32768, -32768, -32768, -32768, 19, 66, 48,
    43, 50, 51, 54, 84, 85, 87, 88, 55, -32768,
    90, 91, 92, 93, -32768, -32768, 58, 95, -32768, -32768,
    -32768, -32768, -32768, 34, -32768, -32768, -32768, -32768, -32768,
    -32768,
    -32768, -32768, -32768, -32768, -32768, -32768, 23, -32768, 94, 96,
    -32768, 97, 98, 101, 103, -32768, 104, 105, 106, 107,
    43, 108, -32768, -32768, -32768, -32768, -32768, -32768, 109, 110,
    43, -32768, -32768, -32768, -32768, 12, -32768, -32768, -32768,
    -32768,
    -32768, -32768, 20, -32768, -32768, -32768, 43, 43, -32768, -32768,
    -32768, -32768, -32768, 99, 114, -32768
};

static const short  yypgoto[] = { -32768,
    29, -32768, -64, 100, -32768, -32768, -32768, -32768, -32768,
    -32768,
    -32768, -32768, -32768, -32768, -32768, 102, 111, -32768, -32768,
    -32768,
    -32768, -32768, -71, -32768, -32768
};

#define	YYLAST		128

static const short  yytable[] = { 95,
    30, 16, 17, 5, 6, 18, 19, 7, 20, 31,
    32, 33, 97, 21, 2, 3, 4, 5, 6, 111,
    2, 7, 2, 3, 4, 2, 3, 4, 25, 116,
    45, 46, 47, 48, 29, 34, 2, 3, 4, 27,
    40, 28, 42, 43, 94, 122, 123, 44, 121, 119,
    57, 58, 79, 80, 49, 120, 81, 96, 59, 60,
    61, 62, 63, 64, 65, 66, 67, 68, 69, 70,
    71, 72, 73, 74, 75, 76, 77, 51, 52, 53,
    54, 2, 3, 4, 5, 6, 82, 83, 7, 84,
    85, 86, 87, 88, 89, 90, 92, 93, 125, 102,
    103, 55, 99, 104, 100, 105, 107, 108, 109, 110,
    112, 114, 115, 126, 106, 0, 0, 0, 0, 0,
    0, 0, 0, 0, 0, 35, 22, 36
};

static const short  yycheck[] = { 64,
    3, 3, 3, 6, 7, 3, 3, 10, 3, 12,
    13, 14, 77, 37, 3, 4, 5, 6, 7, 91,
    3, 10, 3, 4, 5, 3, 4, 5, 39, 101,
    12, 13, 14, 15, 3, 38, 3, 4, 5, 35,
    8, 35, 3, 3, 11, 117, 118, 3, 113, 38,
    3, 9, 3, 3, 36, 36, 3, 35, 16, 17,
    18, 19, 20, 21, 22, 23, 24, 25, 26, 27,
    28, 29, 30, 31, 32, 33, 34, 12, 13, 14,
    15, 3, 4, 5, 6, 7, 3, 3, 10, 3,
    3, 37, 3, 3, 3, 3, 39, 3, 0, 3,
    3, 36, 9, 3, 9, 3, 3, 3, 3, 3,
    3, 3, 3, 0, 86, -1, -1, -1, -1, -1,
    -1, -1, -1, -1, -1, 26, 16, 26
};

/* -*-C-*-  Note some compilers choke on comments on `#line' lines.  */

/* Skeleton output parser for bison,
   Copyright (C) 1984, 1989, 1990 Free Software Foundation, Inc.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2, or (at your option)
   any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */

/* As a special exception, when this file is copied by Bison into a
   Bison output file, you may use that output file without restriction.
   This special exception was added by the Free Software Foundation
   in version 1.24 of Bison.  */

/* This is the parser code that is written into each bison parser
  when the %semantic_parser declaration is not specified in the grammar.
  It was written by Richard Stallman by simplifying the hairy parser
  used when %semantic_parser is specified.  */

/* Note: there must be only one dollar sign in this file.
   It is replaced by the list of actions, each action
   as one case of the switch.  */

#define yyerrok		(yyerrstatus = 0)
#define yyclearin	(yychar = YYEMPTY)
#define YYEMPTY		-2
#define YYEOF		0
#define YYACCEPT	return(0)
#define YYABORT 	return(1)
#define YYERROR		goto yyerrlab1

/* Like YYERROR except do call yyerror.
   This remains here temporarily to ease the
   transition to the new meaning of YYERROR, for GCC.
   Once GCC version 2 has supplanted version 1, this can go.  */
#define YYFAIL		goto yyerrlab
#define YYRECOVERING()  (!!yyerrstatus)
#define YYBACKUP(token, value) \
do								\
  if (yychar == YYEMPTY && yylen == 1)				\
    { yychar = (token), yylval = (value);			\
      yychar1 = YYTRANSLATE (yychar);				\
      YYPOPSTACK;						\
      goto yybackup;						\
    }								\
  else								\
    { yyerror ("syntax error: cannot back up"); YYERROR; }	\
while (0)

#define YYTERROR	1
#define YYERRCODE	256

#ifndef YYPURE
#define YYLEX		yylex()
#endif

#ifdef YYPURE
#ifdef YYLSP_NEEDED
#ifdef YYLEX_PARAM
#define YYLEX		yylex(&yylval, &yylloc, YYLEX_PARAM)
#else
#define YYLEX		yylex(&yylval, &yylloc)
#endif
#else /* not YYLSP_NEEDED */
#ifdef YYLEX_PARAM
#define YYLEX		yylex(&yylval, YYLEX_PARAM)
#else
#define YYLEX		yylex(&yylval)
#endif
#endif /* not YYLSP_NEEDED */
#endif

/* If nonreentrant, generate the variables here */

#ifndef YYPURE

int                 yychar;     /*  the lookahead symbol  */
YYSTYPE             yylval;     /*  the semantic value of the  */

    /*  lookahead symbol   */

#ifdef YYLSP_NEEDED
YYLTYPE             yylloc;     /*  location data for the lookahead */

    /*  symbol    */
#endif

int                 yynerrs;    /*  number of parse errors so far       */

#endif /* not YYPURE */

#if YYDEBUG != 0
int                 yydebug;    /*  nonzero means print parse trace */

/* Since this is uninitialized, it does not stop multiple parsers
   from coexisting.  */
#endif

/*  YYINITDEPTH indicates the initial size of the parser's stacks	*/

#ifndef	YYINITDEPTH
#define YYINITDEPTH 200
#endif

/*  YYMAXDEPTH is the maximum size the stacks can grow to
    (effective only if the built-in stack extension method is used).  */

#if (defined(YYMAXDEPTH))
#if YYMAXDEPTH == 0
#undef YYMAXDEPTH
#endif
#endif /* (defined(YYMAXDEPTH)) */

#ifndef YYMAXDEPTH
#define YYMAXDEPTH 10000
#endif

/* Prevent warning if -Wstrict-prototypes.  */
#if (defined(__GNUC__) || defined(__MWERKS__))
int                 yyparse(void);
#endif /* (defined(__GNUC__) || defined(__MWERKS__)) */

#if __GNUC__ > 1               /* GNU C and GNU C++ define this.  */
#define __yy_memcpy(FROM,TO,COUNT)	__builtin_memcpy(TO,FROM,COUNT)
#else /* not GNU C or C++ */

#ifndef __cplusplus

/* This is the most reliable way to avoid incompatibilities
   in available built-in functions on various systems.  */
static void
__yy_memcpy(from, to, count)
    char               *from;
    char               *to;
    int                 count;
{
    register char      *f = from;
    register char      *t = to;
    register int        i = count;

    while (i-- > 0)
        *t++ = *f++;
}

#else /* __cplusplus */

/* This is the most reliable way to avoid incompatibilities
   in available built-in functions on various systems.  */
static void
__yy_memcpy(char *from, char *to, int count)
{
    register char      *f = from;
    register char      *t = to;
    register int        i = count;

    while (i-- > 0)
        *t++ = *f++;
}

#endif /* __cplusplus */
#endif

/* The user can define YYPARSE_PARAM as the name of an argument to be passed
   into yyparse.  The argument should have type void *.
   It should actually point to an object.
   Grammar actions can access the variable by casting it
   to the proper pointer type.  */

#ifdef YYPARSE_PARAM
#define YYPARSE_PARAM_DECL void *YYPARSE_PARAM;
#else
#define YYPARSE_PARAM
#define YYPARSE_PARAM_DECL
#endif

int
yyparse(YYPARSE_PARAM)
    YYPARSE_PARAM_DECL
{
    register int        yystate;
    register int        yyn;
    register short     *yyssp;
    register YYSTYPE   *yyvsp;
    int                 yyerrstatus; /*  number of tokens to shift before error messages enabled */
    int                 yychar1 = 0; /*  lookahead token as an internal (translated) token number */

    short               yyssa[YYINITDEPTH]; /*  the state stack   */
    YYSTYPE             yyvsa[YYINITDEPTH]; /*  the semantic value stack  */

    short              *yyss = yyssa; /*  refer to the stacks thru separate pointers */
    YYSTYPE            *yyvs = yyvsa; /*  to allow yyoverflow to reallocate them elsewhere */

#ifdef YYLSP_NEEDED
    YYLTYPE             yylsa[YYINITDEPTH]; /*  the location stack   */
    YYLTYPE            *yyls = yylsa;
    YYLTYPE            *yylsp;

#define YYPOPSTACK   (yyvsp--, yyssp--, yylsp--)
#else
#define YYPOPSTACK   (yyvsp--, yyssp--)
#endif

    int                 yystacksize = YYINITDEPTH;

#ifdef YYPURE
    int                 yychar;
    YYSTYPE             yylval;
    int                 yynerrs;

#ifdef YYLSP_NEEDED
    YYLTYPE             yylloc;

#endif
#endif

    YYSTYPE             yyval;  /*  the variable used to return  */

    /*  semantic values from the action */
    /*  routines    */

    int                 yylen;

#if YYDEBUG != 0
    if (yydebug)
        fprintf(stderr, "Starting parse\n");
#endif

    yystate = 0;
    yyerrstatus = 0;
    yynerrs = 0;
    yychar = YYEMPTY;          /* Cause a token to be read.  */

    /* Initialize stack pointers.
     * Waste one element of value and location stack
     * so that they stay on the same level as the state stack.
     * The wasted elements are never initialized.  */

    yyssp = yyss - 1;
    yyvsp = yyvs;
#ifdef YYLSP_NEEDED
    yylsp = yyls;
#endif

/* Push a new state, which is found in  yystate  .  */

/* In all cases, when you get here, the value and location stacks
   have just been pushed. so pushing a state here evens the stacks.  */
  yynewstate:

    *++yyssp = yystate;

    if (yyssp >= yyss + yystacksize - 1)
    {
        /* Give user a chance to reallocate the stack */
        /* Use copies of these so that the &'s don't force the real ones into memory. */
        YYSTYPE            *yyvs1 = yyvs;
        short              *yyss1 = yyss;

#ifdef YYLSP_NEEDED
        YYLTYPE            *yyls1 = yyls;

#endif

        /* Get the current used size of the three stacks, in elements.  */
        int                 size = yyssp - yyss + 1;

#ifdef yyoverflow
        /* Each stack pointer address is followed by the size of
         * the data in use in that stack, in bytes.  */
#ifdef YYLSP_NEEDED
        /* This used to be a conditional around just the two extra args,
         * but that might be undefined if yyoverflow is a macro.  */
        yyoverflow("parser stack overflow",
                   &yyss1, size * sizeof(*yyssp),
                   &yyvs1, size * sizeof(*yyvsp),
                   &yyls1, size * sizeof(*yylsp), &yystacksize);
#else
        yyoverflow("parser stack overflow",
                   &yyss1, size * sizeof(*yyssp),
                   &yyvs1, size * sizeof(*yyvsp), &yystacksize);
#endif

        yyss = yyss1;
        yyvs = yyvs1;
#ifdef YYLSP_NEEDED
        yyls = yyls1;
#endif
#else /* no yyoverflow */
        /* Extend the stack our own way.  */
        if (yystacksize >= YYMAXDEPTH)
        {
            yyerror("parser stack overflow");
            return 2;
        }
        yystacksize *= 2;
        if (yystacksize > YYMAXDEPTH)
            yystacksize = YYMAXDEPTH;
        yyss = (short *) RwMalloc(yystacksize * sizeof(*yyssp));
        __yy_memcpy((char *) yyss1, (char *) yyss,
                    size * sizeof(*yyssp));
        yyvs = (YYSTYPE *) RwMalloc(yystacksize * sizeof(*yyvsp));
        __yy_memcpy((char *) yyvs1, (char *) yyvs,
                    size * sizeof(*yyvsp));
#ifdef YYLSP_NEEDED
        yyls = (YYLTYPE *) RwMalloc(yystacksize * sizeof(*yylsp));
        __yy_memcpy((char *) yyls1, (char *) yyls,
                    size * sizeof(*yylsp));
#endif
#endif /* no yyoverflow */

        yyssp = yyss + size - 1;
        yyvsp = yyvs + size - 1;
#ifdef YYLSP_NEEDED
        yylsp = yyls + size - 1;
#endif

#if YYDEBUG != 0
        if (yydebug)
            fprintf(stderr, "Stack size increased to %d\n",
                    yystacksize);
#endif

        if (yyssp >= yyss + yystacksize - 1)
            YYABORT;
    }

#if YYDEBUG != 0
    if (yydebug)
        fprintf(stderr, "Entering state %d\n", yystate);
#endif

    goto yybackup;
  yybackup:

/* Do appropriate processing given the current state.  */

/* Read a lookahead token if we need one and don't already have one.  */

/* yyresume: */

    /* First try to decide what to do without reference to lookahead token.  */

    yyn = yypact[yystate];
    if (yyn == YYFLAG)
        goto yydefault;

    /* Not known => get a lookahead token if don't already have one.  */

    /* yychar is either YYEMPTY or YYEOF
     * or a valid token in external form.  */

    if (yychar == YYEMPTY)
    {
#if YYDEBUG != 0
        if (yydebug)
            fprintf(stderr, "Reading a token: ");
#endif
        yychar = YYLEX;
    }

    /* Convert token to internal form (in yychar1) for indexing tables with */

    if (yychar <= 0)           /* This means end of input. */
    {
        yychar1 = 0;
        yychar = YYEOF;        /* Don't call YYLEX any more */

#if YYDEBUG != 0
        if (yydebug)
            fprintf(stderr, "Now at end of input.\n");
#endif
    }
    else
    {
        yychar1 = YYTRANSLATE(yychar);

#if YYDEBUG != 0
        if (yydebug)
        {
            fprintf(stderr, "Next token is %d (%s", yychar,
                    yytname[yychar1]);
            /* Give the individual parser a way to print the precise meaning
             * of a token, for further debugging info.  */
#ifdef YYPRINT
            YYPRINT(stderr, yychar, yylval);
#endif
            fprintf(stderr, ")\n");
        }
#endif
    }

    yyn += yychar1;
    if (yyn < 0 || yyn > YYLAST || yycheck[yyn] != yychar1)
        goto yydefault;

    yyn = yytable[yyn];

    /* yyn is what to do for this token type in this state.
     * Negative => reduce, -yyn is rule number.
     * Positive => shift, yyn is new state.
     * New state is final state => don't bother to shift,
     * just return success.
     * 0, or most negative number => error.  */

    if (yyn < 0)
    {
        if (yyn == YYFLAG)
            goto yyerrlab;
        yyn = -yyn;
        goto yyreduce;
    }
    else if (yyn == 0)
        goto yyerrlab;

    if (yyn == YYFINAL)
        YYACCEPT;

    /* Shift the lookahead token.  */

#if YYDEBUG != 0
    if (yydebug)
        fprintf(stderr, "Shifting token %d (%s), ", yychar,
                yytname[yychar1]);
#endif

    /* Discard the token being shifted unless it is eof.  */
    if (yychar != YYEOF)
        yychar = YYEMPTY;

    *++yyvsp = yylval;
#ifdef YYLSP_NEEDED
    *++yylsp = yylloc;
#endif

    /* count tokens shifted since error; after three, turn off error status.  */
    if (yyerrstatus)
        yyerrstatus--;

    yystate = yyn;
    goto yynewstate;

/* Do the default action for the current state.  */
  yydefault:

    yyn = yydefact[yystate];
    if (yyn == 0)
        goto yyerrlab;

/* Do a reduction.  yyn is the number of a rule to reduce with.  */
  yyreduce:
    yylen = yyr2[yyn];
    if (yylen > 0)
        yyval = yyvsp[1 - yylen]; /* implement default value of the action */

#if YYDEBUG != 0
    if (yydebug)
    {
        int                 i;

        fprintf(stderr, "Reducing via rule %d (line %d), ",
                yyn, yyrline[yyn]);

        /* Print the symbols being reduced, and their result.  */
        for (i = yyprhs[yyn]; yyrhs[i] > 0; i++)
            fprintf(stderr, "%s ", yytname[yyrhs[i]]);
        fprintf(stderr, " -> %s\n", yytname[yyr1[yyn]]);
    }
#endif

    switch (yyn)
    {

        case 1:
            {;
                break;
            }
        case 7:
            {;
                break;
            }
        case 8:
            {
                SymTab_AddEntry(yyvsp[-1].string, yyvsp[0].aNode);
                RwFree(yyvsp[-1].string);;
                break;
            }
        case 9:
            {
                enterUse(yyvsp[0].string);
                RwFree(yyvsp[0].string);;
                break;
            }
        case 12:
            {
                beginProto(yyvsp[0].string);;
                break;
            }
        case 13:
            {
                endProto();
                RwFree(yyvsp[-7].string);;
                break;
            }
        case 14:
            {
                beginProto(yyvsp[0].string);;
                break;
            }
        case 15:
            {
                expect(MFSTRING);
                enterExternProtoUrlField(yyvsp[-4].string);;
                break;
            }
        case 16:
            {
                exitExternProtoUrlField();
                endProto();
                RwFree(yyvsp[-6].string);;
                break;
            }
        case 19:
            {
                addEventIn(yyvsp[-1].string, yyvsp[0].string);
                RwFree(yyvsp[-1].string);
                RwFree(yyvsp[0].string);;
                break;
            }
        case 20:
            {
                addEventOut(yyvsp[-1].string, yyvsp[0].string);
                RwFree(yyvsp[-1].string);
                RwFree(yyvsp[0].string);;
                break;
            }
        case 21:
            {
                int                 type =
                    addField(yyvsp[-1].string, yyvsp[0].string);

                expect(type);
                enterProtoField(yyvsp[0].string);;
                break;
            }
        case 22:
            {
                exitProtoField();
                RwFree(yyvsp[-3].string);
                RwFree(yyvsp[-2].string);;
                break;
            }
        case 23:
            {
                int                 type =
                    addExposedField(yyvsp[-1].string, yyvsp[0].string);

                expect(type);
                enterProtoField(yyvsp[0].string);;
                break;
            }
        case 24:
            {
                exitProtoField();
                RwFree(yyvsp[-3].string);
                RwFree(yyvsp[-2].string);;
                break;
            }
        case 27:
            {
                addEventIn(yyvsp[-1].string, yyvsp[0].string);
                RwFree(yyvsp[-1].string);
                RwFree(yyvsp[0].string);;
                break;
            }
        case 28:
            {
                addEventOut(yyvsp[-1].string, yyvsp[0].string);
                RwFree(yyvsp[-1].string);
                RwFree(yyvsp[0].string);;
                break;
            }
        case 29:
            {
                addField(yyvsp[-1].string, yyvsp[0].string);
                RwFree(yyvsp[-1].string);
                RwFree(yyvsp[0].string);;
                break;
            }
        case 30:
            {
                addExposedField(yyvsp[-1].string, yyvsp[0].string);
                RwFree(yyvsp[-1].string);
                RwFree(yyvsp[0].string);;
                break;
            }
        case 31:
            {
                Route_Set(yyvsp[-6].string, yyvsp[-4].string,
                          yyvsp[-2].string, yyvsp[0].string);
                RwFree(yyvsp[-6].string);
                RwFree(yyvsp[-4].string);
                RwFree(yyvsp[-2].string);
                RwFree(yyvsp[0].string);;
                break;
            }
        case 32:
            {
                enterNode(yyvsp[0].string);;
                break;
            }
        case 33:
            {
                yyval.aNode = exitNode();
                RwFree(yyvsp[-4].string);;
                break;
            }
        case 36:
            {
                enterField(yyvsp[0].string);;
                break;
            }
        case 37:
            {
                exitField();
                RwFree(yyvsp[-2].string);;
                break;
            }
        case 40:
            {
                enterScript();
                RwFree(yyvsp[-1].string);
                RwFree(yyvsp[0].string);
                exitScript();
                break;
            }
        case 41:
            {
                enterScript();
                RwFree(yyvsp[-1].string);
                RwFree(yyvsp[0].string);
                exitScript();
                break;
            }
        case 42:
            {
                int                 type;

                enterScript();
                type = fieldType(yyvsp[-1].string);
                expect(type);;
                break;
            }
        case 43:
            {
                RwFree(yyvsp[-3].string);
                RwFree(yyvsp[-2].string);
                exitScript();
                break;
            }
        case 44:
            {
                enterScript();
                RwFree(yyvsp[-3].string);
                RwFree(yyvsp[-2].string);
                RwFree(yyvsp[0].string);
                exitScript();
                break;
            }
        case 45:
            {
                enterScript();
                RwFree(yyvsp[-3].string);
                RwFree(yyvsp[-2].string);
                RwFree(yyvsp[0].string);
                exitScript();
                break;
            }
        case 66:
            {
                instanceIs(yyvsp[0].string);
                RwFree(yyvsp[0].string);;
                break;
            }
    }
    /* the action file gets copied in in place of this dollarsign */

    yyvsp -= yylen;
    yyssp -= yylen;
#ifdef YYLSP_NEEDED
    yylsp -= yylen;
#endif

#if YYDEBUG != 0
    if (yydebug)
    {
        short              *ssp1 = yyss - 1;

        fprintf(stderr, "state stack now");
        while (ssp1 != yyssp)
            fprintf(stderr, " %d", *++ssp1);
        fprintf(stderr, "\n");
    }
#endif

    *++yyvsp = yyval;

#ifdef YYLSP_NEEDED
    yylsp++;
    if (yylen == 0)
    {
        yylsp->first_line = yylloc.first_line;
        yylsp->first_column = yylloc.first_column;
        yylsp->last_line = (yylsp - 1)->last_line;
        yylsp->last_column = (yylsp - 1)->last_column;
        yylsp->text = 0;
    }
    else
    {
        yylsp->last_line = (yylsp + yylen - 1)->last_line;
        yylsp->last_column = (yylsp + yylen - 1)->last_column;
    }
#endif

    /* Now "shift" the result of the reduction.
     * Determine what state that goes to,
     * based on the state we popped back to
     * and the rule number reduced by.  */

    yyn = yyr1[yyn];

    yystate = yypgoto[yyn - YYNTBASE] + *yyssp;
    if (yystate >= 0 && yystate <= YYLAST && yycheck[yystate] == *yyssp)
        yystate = yytable[yystate];
    else
        yystate = yydefgoto[yyn - YYNTBASE];

    goto yynewstate;

  yyerrlab:                   /* here on detecting error */

    if (!yyerrstatus)
        /* If not already recovering from an error, report this error.  */
    {
        ++yynerrs;

#ifdef YYERROR_VERBOSE
        yyn = yypact[yystate];

        if (yyn > YYFLAG && yyn < YYLAST)
        {
            int                 size = 0;
            char               *msg;
            int                 x, count;

            count = 0;
            /* Start X at -yyn if nec to avoid negative indexes in yycheck.  */
            for (x = (yyn < 0 ? -yyn : 0);
                 x < (sizeof(yytname) / sizeof(char *)); x++)

                if (yycheck[x + yyn] == x)
                    size += strlen(yytname[x]) + 15, count++;
            msg = (char *) RwMalloc(size + 15);
            if (msg != 0)
            {
                strcpy(msg, "parse error");

                if (count < 5)
                {
                    count = 0;
                    for (x = (yyn < 0 ? -yyn : 0);
                         x < (sizeof(yytname) / sizeof(char *)); x++)

                        if (yycheck[x + yyn] == x)
                        {
                            strcat(msg, count == 0 ? ", expecting `" :
                                   " or `");
                            strcat(msg, yytname[x]);
                            strcat(msg, "'");
                            count++;
                        }
                }
                yyerror(msg);
                RwFree(msg);
            }
            else
                yyerror("parse error; also virtual memory exceeded");
        }
        else
#endif /* YYERROR_VERBOSE */
            yyerror("parse error");
    }

    goto yyerrlab1;
  yyerrlab1:                  /* here on error raised explicitly by an action */

    if (yyerrstatus == 3)
    {
        /* if just tried and failed to reuse lookahead token after an error, discard it.  */

        /* return failure if at end of input */
        if (yychar == YYEOF)
            YYABORT;

#if YYDEBUG != 0
        if (yydebug)
            fprintf(stderr, "Discarding token %d (%s).\n", yychar,
                    yytname[yychar1]);
#endif

        yychar = YYEMPTY;
    }

    /* Else will try to reuse lookahead token
     * after shifting the error token.  */

    yyerrstatus = 3;           /* Each real token shifted decrements this */

    goto yyerrhandle;

  yyerrdefault:               /* current state does not do anything special for the error token. */

#if 0
    /* This is wrong; only states that explicitly want error tokens
     * should shift them.  */
    yyn = yydefact[yystate];   /* If its default is to accept any token, ok.  Otherwise pop it. */
    if (yyn)
        goto yydefault;
#endif

  yyerrpop:                   /* pop the current state because it cannot handle the error token */

    if (yyssp == yyss)
        YYABORT;
    yyvsp--;
    yystate = *--yyssp;
#ifdef YYLSP_NEEDED
    yylsp--;
#endif

#if YYDEBUG != 0
    if (yydebug)
    {
        short              *ssp1 = yyss - 1;

        fprintf(stderr, "Error: state stack now");
        while (ssp1 != yyssp)
            fprintf(stderr, " %d", *++ssp1);
        fprintf(stderr, "\n");
    }
#endif

  yyerrhandle:

    yyn = yypact[yystate];
    if (yyn == YYFLAG)
        goto yyerrdefault;

    yyn += YYTERROR;
    if (yyn < 0 || yyn > YYLAST || yycheck[yyn] != YYTERROR)
        goto yyerrdefault;

    yyn = yytable[yyn];
    if (yyn < 0)
    {
        if (yyn == YYFLAG)
            goto yyerrpop;
        yyn = -yyn;
        goto yyreduce;
    }
    else if (yyn == 0)
        goto yyerrpop;

    if (yyn == YYFINAL)
        YYACCEPT;

#if YYDEBUG != 0
    if (yydebug)
        fprintf(stderr, "Shifting error token, ");
#endif

    *++yyvsp = yylval;
#ifdef YYLSP_NEEDED
    *++yylsp = yylloc;
#endif

    yystate = yyn;
    goto yynewstate;
}

void
yyerror(const char *msg)
{
    RWFUNCTION("yyerror");

    RWERROR((E_RP_VRML_PARSER, currentLineNumber + 1, msg));
    expect(0);

    RWRETURNVOID();
}
