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/*  A Bison parser, made from mfpp.y with Bison version GNU Bison version 1.22
  */

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

#define	FILENAME	258
#define	ID	259
#define	TEXT	260
#define	IF	261
#define	ELIF	262
#define	ELSE	263
#define	ENDIF	264
#define	IFDEF	265
#define	IFNDEF	266
#define	INCLUDE	267
#define	CINCLUDE	268
#define	DEFINE	269
#define	UNDEF	270
#define	BOGUS	271

#line 10 "mfpp.y"

#include <stdio.h>
#include <string.h>
#include <limits.h>
#include <stdarg.h>
#include <ctype.h>
#include "mfpp.h"

static void do_include(char *file);
static void do_cinclude(char *file);
static int yylex(void);


#line 24 "mfpp.y"
typedef union {
  char *idsym;			/* ID symbol */
  char *file;			/* file name */
  char *deftxt;			/* %define text */
  int flag;			/* truth value */
} 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

#include <stdio.h>

#ifndef __cplusplus
#ifndef __STDC__
#define const
#endif
#endif



#define	YYFINAL		48
#define	YYFLAG		-32768
#define	YYNTBASE	26

#define YYTRANSLATE(x) ((unsigned)(x) <= 271 ? yytranslate[x] : 32)

static const char yytranslate[] = {     0,
     2,     2,     2,     2,     2,     2,     2,     2,     2,    22,
     2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
     2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
     2,     2,    19,     2,    20,     2,     2,    18,     2,    24,
    25,    21,     2,     2,     2,     2,     2,     2,     2,     2,
     2,     2,     2,     2,     2,     2,     2,    23,     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,    17,     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,     2,     1,     2,     3,     4,     5,
     6,     7,     8,     9,    10,    11,    12,    13,    14,    15,
    16
};

#if YYDEBUG != 0
static const short yyprhs[] = {     0,
     0,     3,     4,     8,     9,    12,    15,    17,    19,    22,
    25,    28,    31,    36,    39,    43,    46,    48,    50,    54,
    58,    61,    65,    67,    70,    74
};

static const short yyrhs[] = {    27,
    28,     0,     0,    27,    28,    22,     0,     0,     6,    29,
     0,     7,    29,     0,     8,     0,     9,     0,    10,    29,
     0,    11,    29,     0,    12,     3,     0,    13,     3,     0,
    14,    31,    23,     5,     0,    14,    31,     0,    14,    31,
    31,     0,    15,    31,     0,    31,     0,    30,     0,    29,
    18,    29,     0,    29,    17,    29,     0,    19,    29,     0,
    24,    30,    25,     0,     4,     0,    21,    31,     0,    24,
    31,    25,     0,    31,    20,    31,     0
};

#endif

#if YYDEBUG != 0
static const short yyrline[] = { 0,
    58,    61,    62,    65,    66,    67,    68,    69,    70,    71,
    72,    73,    74,    75,    76,    77,    80,    81,    84,    85,
    86,    87,    90,    91,    92,    93
};

static const char * const yytname[] = {   "$","error","$illegal.","FILENAME",
"ID","TEXT","IF","ELIF","ELSE","ENDIF","IFDEF","IFNDEF","INCLUDE","CINCLUDE",
"DEFINE","UNDEF","BOGUS","'|'","'&'","'!'","'#'","'*'","'\\n'","':'","'('","')'",
"file","lines","line","cond","purecond","idexpr",""
};
#endif

static const short yyr1[] = {     0,
    26,    27,    27,    28,    28,    28,    28,    28,    28,    28,
    28,    28,    28,    28,    28,    28,    29,    29,    30,    30,
    30,    30,    31,    31,    31,    31
};

static const short yyr2[] = {     0,
     2,     0,     3,     0,     2,     2,     1,     1,     2,     2,
     2,     2,     4,     2,     3,     2,     1,     1,     3,     3,
     2,     3,     1,     2,     3,     3
};

static const short yydefact[] = {     2,
     4,     0,     0,     7,     8,     0,     0,     0,     0,     0,
     0,     1,    23,     0,     0,     0,     5,    18,    17,     6,
     9,    10,    11,    12,     0,    14,    16,     3,    21,    24,
     0,    18,    17,     0,     0,     0,     0,     0,    15,    22,
    25,    20,    19,    26,    13,     0,     0,     0
};

static const short yydefgoto[] = {    46,
     1,    12,    17,    18,    19
};

static const short yypact[] = {-32768,
    33,    14,    14,-32768,-32768,    14,    14,     9,    11,     5,
     5,   -14,-32768,    14,     5,    14,     2,-32768,     3,     2,
     2,     2,-32768,-32768,     5,     1,     3,-32768,-32768,-32768,
     2,    12,   -10,    14,    14,     5,   -10,    23,     3,-32768,
-32768,    16,-32768,-32768,-32768,    30,    36,-32768
};

static const short yypgoto[] = {-32768,
-32768,-32768,    -3,    34,    -9
};


#define	YYLAST		50


static const short yytable[] = {    20,
    26,    27,    21,    22,    13,    30,    33,    28,    13,    36,
    29,    23,    31,    24,    41,    37,    39,    13,    34,    35,
    36,    15,    36,    38,    25,    15,    44,    45,    25,    47,
    42,    43,    14,    35,    15,    48,    40,    16,     2,     3,
     4,     5,     6,     7,     8,     9,    10,    11,     0,    32
};

static const short yycheck[] = {     3,
    10,    11,     6,     7,     4,    15,    16,    22,     4,    20,
    14,     3,    16,     3,    25,    25,    26,     4,    17,    18,
    20,    21,    20,    23,    24,    21,    36,     5,    24,     0,
    34,    35,    19,    18,    21,     0,    25,    24,     6,     7,
     8,     9,    10,    11,    12,    13,    14,    15,    -1,    16
};
/* -*-C-*-  Note some compilers choke on comments on `#line' lines.  */
#line 3 "/usr/lib/bison.simple"

/* Skeleton output parser for bison,
   Copyright (C) 1984, 1989, 1990 Bob Corbett and Richard Stallman

   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 1, 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.  */


#ifndef alloca
#ifdef __GNUC__
#define alloca __builtin_alloca
#else /* not GNU C.  */
#if (!defined (__STDC__) && defined (sparc)) || defined (__sparc__) || defined (__sparc) || defined (__sgi)
#include <alloca.h>
#else /* not sparc */
#if defined (MSDOS) && !defined (__TURBOC__)
#include <malloc.h>
#else /* not MSDOS, or __TURBOC__ */
#if defined(_AIX)
#include <malloc.h>
 #pragma alloca
#else /* not MSDOS, __TURBOC__, or _AIX */
#ifdef __hpux
#ifdef __cplusplus
extern "C" {
void *alloca (unsigned int);
};
#else /* not __cplusplus */
void *alloca ();
#endif /* not __cplusplus */
#endif /* __hpux */
#endif /* not _AIX */
#endif /* not MSDOS, or __TURBOC__ */
#endif /* not sparc.  */
#endif /* not GNU C.  */
#endif /* alloca not defined.  */

/* 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
#define YYLEX		yylex(&yylval, &yylloc)
#else
#define YYLEX		yylex(&yylval)
#endif
#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 YYMAXDEPTH == 0
#undef YYMAXDEPTH
#endif

#ifndef YYMAXDEPTH
#define YYMAXDEPTH 10000
#endif

/* Prevent warning if -Wstrict-prototypes.  */
#ifdef __GNUC__
int yyparse (void);
#endif

#if __GNUC__ > 1		/* GNU C and GNU C++ define this.  */
#define __yy_bcopy(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_bcopy (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_bcopy (char *from, char *to, int count)
{
  register char *f = from;
  register char *t = to;
  register int i = count;

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

#endif
#endif

#line 184 "/usr/lib/bison.simple"
int
yyparse()
{
  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 *) alloca (yystacksize * sizeof (*yyssp));
      __yy_bcopy ((char *)yyss1, (char *)yyss, size * sizeof (*yyssp));
      yyvs = (YYSTYPE *) alloca (yystacksize * sizeof (*yyvsp));
      __yy_bcopy ((char *)yyvs1, (char *)yyvs, size * sizeof (*yyvsp));
#ifdef YYLSP_NEEDED
      yyls = (YYLTYPE *) alloca (yystacksize * sizeof (*yylsp));
      __yy_bcopy ((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 5:
#line 66 "mfpp.y"
{ do_if(yyvsp[0].flag); ;
    break;}
case 6:
#line 67 "mfpp.y"
{ do_elif(yyvsp[0].flag); ;
    break;}
case 7:
#line 68 "mfpp.y"
{ do_else(); ;
    break;}
case 8:
#line 69 "mfpp.y"
{ do_endif(); ;
    break;}
case 9:
#line 70 "mfpp.y"
{ do_if(yyvsp[0].flag); ;
    break;}
case 10:
#line 71 "mfpp.y"
{ do_if(!yyvsp[0].flag); ;
    break;}
case 11:
#line 72 "mfpp.y"
{ do_include(yyvsp[0].file); ;
    break;}
case 12:
#line 73 "mfpp.y"
{ do_cinclude(yyvsp[0].file); ;
    break;}
case 13:
#line 74 "mfpp.y"
{ do_define(yyvsp[-2].idsym,yyvsp[0].deftxt); ;
    break;}
case 14:
#line 75 "mfpp.y"
{ do_define(yyvsp[0].idsym,xstrdup("")); ;
    break;}
case 15:
#line 76 "mfpp.y"
{ do_copy(yyvsp[-1].idsym,yyvsp[0].idsym); ;
    break;}
case 16:
#line 77 "mfpp.y"
{ do_define(yyvsp[0].idsym,NULL); ;
    break;}
case 17:
#line 80 "mfpp.y"
{ yyval.flag = (id_lookup(yyvsp[0].idsym)!=NULL); ;
    break;}
case 18:
#line 81 "mfpp.y"
{ yyval.flag = yyvsp[0].flag; ;
    break;}
case 19:
#line 84 "mfpp.y"
{ yyval.flag = yyvsp[-2].flag && yyvsp[0].flag; ;
    break;}
case 20:
#line 85 "mfpp.y"
{ yyval.flag = yyvsp[-2].flag || yyvsp[0].flag; ;
    break;}
case 21:
#line 86 "mfpp.y"
{ yyval.flag = ! yyvsp[0].flag; ;
    break;}
case 22:
#line 87 "mfpp.y"
{ yyval.flag = yyvsp[-1].flag; ;
    break;}
case 23:
#line 90 "mfpp.y"
{ yyval.idsym = yyvsp[0].idsym; ;
    break;}
case 24:
#line 91 "mfpp.y"
{ yyval.idsym = xstrdup(id_lookup(yyvsp[0].idsym)->txt); ;
    break;}
case 25:
#line 92 "mfpp.y"
{ yyval.idsym = yyvsp[-1].idsym; ;
    break;}
case 26:
#line 93 "mfpp.y"
{ yyval.idsym = xstrcat(yyvsp[-2].idsym,yyvsp[0].idsym);
					  free(yyvsp[-2].idsym);  free(yyvsp[0].idsym); ;
    break;}
}
   /* the action file gets copied in in place of this dollarsign */
#line 465 "/usr/lib/bison.simple"

  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 *) malloc(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);
	      free(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;
}
#line 97 "mfpp.y"


/*
 * Bail out with style
 */

static int errflg = 0;

void yyerror(char *msg,...)
{
  va_list va;

  va_start(va,msg);
  vfprintf(stderr, msg, va);
  va_end(va);
  putc('\n', stderr);
  errflg = 1;			/* Error occurred */
}

/*
 * Support code for the lexer
 */

/* Character class buffer */
static int idchar[(1 << CHAR_BIT)+1];
static const unsigned char *idchars =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_";
#define is_idchar(X) (idchar[((unsigned char)(X))+1])

/* Stack for %include files */
#define MAX_INCLUDE 15
static FILE *istack[MAX_INCLUDE+1];
static long llmemory[MAX_INCLUDE+1];
static int nincl;
static FILE *infile;

static void llremember(void);

static void do_include(char *file)
{
  FILE *f;

  if ( !killcount )
    {
      if ( nincl >= MAX_INCLUDE )
	yyerror("Too many nested %%include files");
      else
	{
	  f = fopen(file, "rt");
	  if ( f )
	    {
	      istack[++nincl] = infile = f;
	      llremember();	/* Initialize file-position memory */
	      if ( debug > 1 )
		fprintf(stderr, "%%include <%s>\n", file);
	    }
	  else
	    yyerror("Could not open %%include file %s", file);
	}
    }
}

/* Primitive support for cpp-style include files.  We're just looking
   for #define's, really; this is here to support autoconf-generated
   headers. */

static void do_cinclude(char *file)
{
  FILE *f;
  char linebuf[8192], *id, *p;

  if ( !killcount )
    {
      f = fopen(file, "rt");
      
      if ( !f )
	yyerror("Could not open %%cinclude file %s", file);
      else
	{
	  if ( debug > 1 )
	    fprintf(stderr, "%%cinclude <%s>\n", file);
	  
	  while ( fgets(linebuf, 8192, f) )
	    {
	      if ( p = strchr(linebuf, '\n') )
		*p = '\0';
	      
	      if ( !strncmp(linebuf, "#define", 7) )
		{
		  p = linebuf+7;
		  if ( *p != ' ' && *p != '\t' )
		    continue;
		  while ( *p == ' ' || *p == '\t' )
		    p++;
		  id = p;
		  while ( *p != ' ' && *p != '\t' && *p != '\n' && *p )
		    p++;
		  if ( *p )
		    {
		      *(p++) = '\0';
		      while ( *p == ' ' && *p == '\t' )
			p++;
		    }
		  id_define(xstrdup(id), xstrdup(p));
		}
	    }
	  fclose(f);
	  if ( debug > 1 )
	    fprintf(stderr, "-- End of %%cinclude --\n", file);
	}
    }
}

/* Character I/O */
static int llungetc_buf[4];
static int llungetc_ctr = 0;

static int llgetc(void)
{
  int c;

  if ( llungetc_ctr )
    return llungetc_buf[--llungetc_ctr];

  while ( (c = getc(infile)) == EOF )
    {
      fclose(infile);
      if ( nincl < 1 )
	{
	  balance_blocks();
	  break;
	}
      if ( debug > 1 )
	fprintf(stderr, "-- End of %%include --\n");

      infile = istack[--nincl];
    }
  if ( debug > 3 )
    if ( isprint(c) )
      fprintf(stderr, "Got: %c\n", c); 
    else
      fprintf(stderr, "Got: %02x\n", c);

  return c;
}

static void llungetc(int c)
{
  llungetc_buf[llungetc_ctr++] = c;
}

static void llremember(void)
{
  llmemory[nincl] = ftell(infile);
}

static void llreturn(void)
{
  llungetc_ctr = 0;
  fseek(infile, llmemory[nincl], SEEK_SET);
}

/*
 * Keyword to YACC token lookup - somewhat unsophisticated
 */
static int keyword_lookup(char *str)
{
  char *cand;
  int val;

#define HV(X,Y) (((X) << CHAR_BIT) + (Y))
#define CAND(X,Y,STR,VAL) case HV(X,Y): cand = STR; val = VAL; break
  switch ( HV(str[0], str[2]) )
    {
      CAND('i','\0',"if",IF);
      CAND('i','d',"ifdef",IFDEF);
      CAND('i','n',"ifndef",IFNDEF);
      CAND('e','i',"elif",ELIF);
      CAND('e','s',"else",ELSE);
      CAND('e','d',"endif",ENDIF);
      CAND('i','c',"include",INCLUDE);
      CAND('c','n',"cinclude",CINCLUDE); 
      CAND('d','f',"define",DEFINE);
      CAND('u','d',"undef",UNDEF);
    default:
      cand = "";  val = 0;  break;
    }

  return strcmp(cand, str) ? 0 : val;
#undef HV
#undef CAND
}

/*
 * The lexer itself
 */

static char tokenbuf[32768];
static enum {
  st_linestart,			/* at the start of a line */
  st_definetext,		/* text for a %define */
  st_expr			/* an expression (body of most lines) */
} lexstate;

static void dtext(void)
{
  lexstate = st_definetext;
}

/*
 * Expand a possible single macro token
 */

static void expand_macro(char *str)
{
  struct identifier *id;
  char *mbuf, *p, *tbptr;

  id = id_lookup(str);
  if ( !id )
    {
      fputs(str, stdout);
    }
  else
    {
      tbptr = tokenbuf;
      for ( p = id->txt ; ; )
	{
	  if ( is_idchar(*p) )
	    *(tbptr++) = *(p++);
	  else
	    {
	      if ( tbptr > tokenbuf )
		{
		  *tbptr = '\0';
		  expand_macro(tokenbuf);
		  tbptr = tokenbuf;
		}
	      if ( *p )
		putchar(*(p++));
	      else
		break;
	    }
	}
    }
}

static int yylex(void)
{
  int c, c2;			/* input character */
  int bslash;			/* backslash encounter? */
  char *tbptr;			/* token buffer pointer */
  struct identifier *id;	/* identifier lookup */

  switch ( lexstate )
    {
    case st_linestart:
      {
	llremember();
	do
	  c = llgetc();
	while ( c == ' ' || c == '\t' );

	if ( c != '%' )
	  {
	    /* Not a preprocessor command - output line */
	    llreturn();
	    tbptr = tokenbuf;
	    do
	      {
		c = llgetc();
		if ( !killcount )
		  { 
		    if ( is_idchar(c) )
		      *(tbptr++) = c;
		    else
		      {
			if ( tbptr > tokenbuf )
			  {
			    *tbptr = '\0';
			    expand_macro(tokenbuf);
			    tbptr = tokenbuf;
			  }
			if ( c == EOF )
			  break;
			putchar(c);
		      }
		  }
	      }
	    while ( c != '\n' );
	    
	    return ( c == EOF ) ? 0 : c;
	  }
	else
	  {
	    /* Must be a preprocessor command */
	    
	    c = llgetc();
	    if ( !is_idchar(c) )
	      {
		/* Preprocessor comment */
		while ( c != '\n' && c != EOF )
		  c = llgetc();
		return ( c == EOF ) ? 0 : c;
	      }

	    tbptr = tokenbuf;
	    while ( is_idchar(c) )
	      {
		*(tbptr++) = c;
		c = llgetc();
	      }
	    llungetc(c);
	    
	    *tbptr = '\0';
	    
	    c = keyword_lookup(tokenbuf);
	    if ( !c )
	      {
		yyerror("Unknown preprocessor directive %%%s", tokenbuf);
		c = BOGUS;
	      }

	    lexstate = st_expr;
	    return c;
	  }
      }
    case st_expr:
      {      
	do
	  c = llgetc();
	while ( c == ' ' || c == '\t' );

	switch ( c )
	  {
	  case '<':
	    tbptr = tokenbuf;
	    while (1)
	      {
		c = llgetc();
		if ( c == '\n' || c == EOF )
		  {
		    yyerror("Unterminated filename in %%include");
		    return ( c == EOF ) ? 0 : c;
		  }
		if ( c < ' ' )
		  {
		    yyerror("Bad character in filename");
		    return BOGUS;
		  }
		if ( c == '>' )
		  break;
		*(tbptr++) = c;
	      }
	    *tbptr = '\0';
	    yylval = xstrdup(tokenbuf);
	    /*
	     * Kluge: normally, \n wouldn't be reduced until the rule was
	     * reduced, at which point we've already switched input.  Handle
	     * by reading ahead and stuffing the input buffer.
	     */
	    do
	      {
		c = llgetc();
		if ( c != '\n' && c != EOF && c != ' ' && c != '\t' )
		  yyerror("Junk at the end of %%include line");
	      }
	    while ( c != '\n' && c != EOF );
	    llremember();
	    llungetc(c);
	    return FILENAME;
	  case '\n':
	    lexstate = st_linestart;
	    return c;
	  case '!':
	  case '*':
	  case '(':
	  case ')':
	    return c;
	  case EOF:
	    return 0;
	  case ':':
	    lexstate = st_definetext;
	    return c;
	  case '&':
	  case '|':
	  case '#':
	    c2 = llgetc();
	    if ( c == c2 )
	      return c;
	    else
	      {
		yyerror("Unrecognized token: %c%c", c, c2);
		return BOGUS;
	      }
	  default:
	    if ( is_idchar(c) )
	      {
		tbptr = tokenbuf;
		while ( is_idchar(c) )
		  {
		    *(tbptr++) = c;
		    c = llgetc();
		  }
		*tbptr = '\0';
		llungetc(c);
		yylval.idsym = xstrdup(tokenbuf);
		return ID;
	      }
	    else
	      {
		if ( isprint(c) )
		  yyerror("Unknown character `%c'", c);
		else
		  yyerror("Unknown character %02x", (unsigned char)c);
		return BOGUS;
	      }
	  }
      }
    case st_definetext:
      {
	int oldc = 0;

	do
	  c = llgetc();
	while ( c == ' ' || c == '\t' );

	tbptr = tokenbuf;
	while(1)
	  {
	    if ( (c == '\n' && oldc != '\\') || c == EOF )
	      break;
	    *(tbptr++) = c;
	    oldc = c;
	    c = llgetc();
	  }
	*tbptr = '\0';
	llungetc(c);
	lexstate = st_expr;
	yylval.deftxt = xstrdup(tokenbuf);
	return TEXT;
      }
    }
}

/*
 * This is the entry point for the lexer-parser - do initalization
 * and call yyparse()
 */

int ppfile(FILE *f)
{
  unsigned const char *p;

  symtab_init();

  memset(idchar, 0, 1<<CHAR_BIT);
  for ( p = idchars ; *p ; p++ )
    idchar[*p+1] = 1;

  lexstate = st_linestart;

  istack[0] = infile = f;
  nincl = 0;
  llremember();			/* Initialize file-position memory */
  yyparse();
  return errflg;
}