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vcc.c

#ifndef lint
static const char yysccsid[] = "@(#)yaccpar     1.9 (Berkeley) 02/21/93";
#endif

#include <stdlib.h>
#include <string.h>

#define YYBYACC 1
#define YYMAJOR 1
#define YYMINOR 9
#define YYPATCH 20070509

#define YYEMPTY (-1)
#define yyclearin    (yychar = YYEMPTY)
#define yyerrok      (yyerrflag = 0)
#define YYRECOVERING (yyerrflag != 0)

extern int yyparse(void);

static int yygrowstack(void);
#define YYPREFIX "yy"

/***************************************************************************
(C) Copyright 1996 Apple Computer, Inc., AT&T Corp., International
Business Machines Corporation and Siemens Rolm Communications Inc.

For purposes of this license notice, the term Licensors shall mean,
collectively, Apple Computer, Inc., AT&T Corp., International
Business Machines Corporation and Siemens Rolm Communications Inc.
The term Licensor shall mean any of the Licensors.

Subject to acceptance of the following conditions, permission is hereby
granted by Licensors without the need for written agreement and without
license or royalty fees, to use, copy, modify and distribute this
software for any purpose.

The above copyright notice and the following four paragraphs must be
reproduced in all copies of this software and any software including
this software.

THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS AND NO LICENSOR SHALL HAVE
ANY OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS OR
MODIFICATIONS.

IN NO EVENT SHALL ANY LICENSOR BE LIABLE TO ANY PARTY FOR DIRECT,
INDIRECT, SPECIAL OR CONSEQUENTIAL DAMAGES OR LOST PROFITS ARISING OUT
OF THE USE OF THIS SOFTWARE EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
DAMAGE.

EACH LICENSOR SPECIFICALLY DISCLAIMS ANY WARRANTIES, EXPRESS OR IMPLIED,
INCLUDING BUT NOT LIMITED TO ANY WARRANTY OF NONINFRINGEMENT OR THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE.

The software is provided with RESTRICTED RIGHTS.  Use, duplication, or
disclosure by the government are subject to restrictions set forth in
DFARS 252.227-7013 or 48 CFR 52.227-19, as applicable.

***************************************************************************/

/*
 * src: vcc.c
 * doc: Parser for vCard and vCalendar. Note that this code is
 * generated by a yacc parser generator. Generally it should not
 * be edited by hand. The real source is vcc.y. The #line directives
 * can be commented out here to make it easier to trace through
 * in a debugger. However, if a bug is found it should
 * be fixed in vcc.y and this file regenerated.
 */


/* debugging utilities */
#if __DEBUG
#define DBG_(x) printf x
#else
#define DBG_(x)
#endif

#ifdef WIN32
#define snprintf   _snprintf
#define strcasecmp stricmp
#endif

/****  External Functions  ****/

/* assign local name to parser variables and functions so that
   we can use more than one yacc based parser.
*/

#define yyparse mime_parse
#define yylex mime_lex
#define yyerror mime_error
#define yychar mime_char
/* #define p_yyval p_mime_val */
#undef yyval
#define yyval mime_yyval
/* #define p_yylval p_mime_lval */
#undef yylval
#define yylval mime_yylval
#define yydebug mime_debug
#define yynerrs mime_nerrs
#define yyerrflag mime_errflag
#define yyss mime_ss
#define yyssp mime_ssp
#define yyvs mime_vs
#define yyvsp mime_vsp
#define yylhs mime_lhs
#define yylen mime_len
#define yydefred mime_defred
#define yydgoto mime_dgoto
#define yysindex mime_sindex
#define yyrindex mime_rindex
#define yygindex mime_gindex
#define yytable mime_table
#define yycheck mime_check
#define yyname mime_name
#define yyrule mime_rule
#define YYPREFIX "mime_"


#ifndef _NO_LINE_FOLDING
#define _SUPPORT_LINE_FOLDING 1
#endif

/* undef below if compile with MFC */
/* #define INCLUDEMFC 1 */

#if defined(WIN32) || defined(_WIN32)
#ifdef INCLUDEMFC
#include <afx.h>
#endif
#endif

#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include "vcc.h"

/****  Types, Constants  ****/

#define YYDEBUG         1     /* 1 to compile in some debugging code */
#define MAXTOKEN  256   /* maximum token (line) length */
#define YYSTACKSIZE     50    /* ~unref ? */
#define MAXLEVEL  10    /* max # of nested objects parseable */
                        /* (includes outermost) */


/****  Global Variables  ****/
int mime_lineNum, mime_numErrors; /* yyerror() can use these */
static VObject* vObjList;
static VObject *curProp;
static VObject *curObj;
static VObject* ObjStack[MAXLEVEL];
static int ObjStackTop;


/* A helpful utility for the rest of the app. */
#if __CPLUSPLUS__
extern "C" {
#endif

    extern void Parse_Debug(const char *s);
    static void yyerror(char *s);

#if __CPLUSPLUS__
    };
#endif

int yylex(void);
int yyparse(void);

enum LexMode {
      L_NORMAL,
      L_VCARD,
      L_VCAL,
      L_VEVENT,
      L_VTODO,
      L_VALUES,
      L_BASE64,
      L_QUOTED_PRINTABLE
      };

/****  Private Forward Declarations  ****/
static void lexClearToken(void);
static char* lexGet1Value(void);
static int lexGeta(void);
static int lexGetc(void);
static char lexGetc_(void);
static char* lexGetDataFromBase64(void);
static char* lexGetQuotedPrintable(void);
static char* lexGetWord(void);
static int lexLookahead(void);
static char* lexLookaheadWord(void);
static void lexPopMode(int top);
static void lexPushMode(enum LexMode mode);
static void lexSkipLookahead(void);
static void lexSkipLookaheadWord(void);
static void lexSkipWhite(void);
static char* lexStr(void);
static int lexWithinMode(enum LexMode mode);
static void enterAttr(const char *s1, const char *s2);
static void enterProps(const char *s);
static void enterValues(const char *value);
static void finiLex(void);
static void mime_error_(char *s);
static VObject* Parse_MIMEHelper(void);
static VObject* popVObject(void);
static int pushVObject(const char *prop);

typedef union {
    char *str;
    VObject *vobj;
    } YYSTYPE;
#define EQ 257
#define COLON 258
#define DOT 259
#define SEMICOLON 260
#define SPACE 261
#define HTAB 262
#define LINESEP 263
#define NEWLINE 264
#define BEGIN_VCARD 265
#define END_VCARD 266
#define BEGIN_VCAL 267
#define END_VCAL 268
#define BEGIN_VEVENT 269
#define END_VEVENT 270
#define BEGIN_VTODO 271
#define END_VTODO 272
#define ID 273
#define STRING 274
#define YYERRCODE 256
short yylhs[] = {                                        -1,
    0,    7,    6,    6,    5,    5,    9,    3,   10,    3,
    8,    8,   14,   11,   11,   16,   12,   12,   15,   15,
   17,   18,   18,    1,   19,   13,   13,    2,    2,   21,
    4,   22,    4,   20,   20,   23,   23,   23,   26,   24,
   27,   24,   28,   25,   29,   25,
};
short yylen[] = {                                         2,
    1,    0,    3,    1,    1,    1,    0,    4,    0,    3,
    2,    1,    0,    5,    1,    0,    3,    1,    2,    1,
    2,    1,    3,    1,    0,    4,    1,    1,    0,    0,
    4,    0,    3,    2,    1,    1,    1,    1,    0,    4,
    0,    3,    0,    4,    0,    3,
};
short yydefred[] = {                                      0,
    0,    0,    0,    5,    6,    0,    1,    0,    0,    0,
    0,    0,   15,   24,    0,    0,    0,    0,   10,    0,
    0,   38,    0,    0,   36,   37,   33,    3,    0,    8,
   11,   13,    0,    0,    0,    0,   31,   34,    0,   17,
    0,    0,    0,   42,    0,   46,    0,   21,   19,   28,
    0,    0,   40,   44,    0,   25,   14,   23,    0,   26,
};
short yydgoto[] = {                                       3,
   15,   51,    4,    5,    6,    7,   12,   22,    8,    9,
   17,   18,   52,   42,   40,   29,   41,   48,   59,   23,
   10,   11,   24,   25,   26,   33,   34,   35,   36,
};
short yysindex[] = {                                   -227,
    0,    0,    0,    0,    0,    0,    0, -249, -262, -253,
 -258, -227,    0,    0,    0, -234, -249, -215,    0,    0,
    0,    0, -223, -253,    0,    0,    0,    0, -247,    0,
    0,    0, -249, -222, -249, -225,    0,    0, -224,    0,
 -247, -221, -220,    0, -218,    0, -206,    0,    0,    0,
 -208, -207,    0,    0, -224,    0,    0,    0, -221,    0,
};
short yyrindex[] = {                                      0,
 -245, -254,    0,    0,    0,    1,    0,    0,    0,    0,
    0,    0,    0,    0, -219,    0, -235,    0,    0, -244,
 -250,    0,    0, -213,    0,    0,    0,    0,    0,    0,
    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,
 -201, -255,    0,    0,    0,    0, -216,    0,    0,    0,
 -205,    0,    0,    0,    0,    0,    0,    0, -255,    0,
};
short yygindex[] = {                                      0,
   -9,    0,    0,    0,    0,   47,    0,   -8,    0,    0,
    0,    0,    2,    0,   19,    0,    0,    0,    0,   38,
    0,    0,    0,    0,    0,    0,    0,    0,    0,
};
#define YYTABLESIZE 268
short yytable[] = {                                      16,
    4,   30,   13,   19,   29,   43,   13,   29,   31,   27,
    7,   39,   39,   32,   30,   20,   30,   21,   30,   14,
    9,   45,   43,   14,   43,   41,   45,    7,   39,   47,
   12,   30,   12,   12,   12,   12,   12,    1,   18,    2,
   16,   22,   32,   22,   37,   58,   46,   44,   14,   53,
   55,   56,   50,   54,   35,   57,   20,   27,   28,   49,
   60,   38,    0,    0,    0,    0,    0,    0,    0,    0,
    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,
    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,
    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,
    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,
    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,
    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,
    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,
    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,
    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,
    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,
    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,
    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,
    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,
    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,
    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,
    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,
    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,
    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,
    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,
    0,    0,    0,    0,    0,    2,    0,    2,
};
short yycheck[] = {                                       8,
    0,  256,  256,  266,  260,  256,  256,  263,   17,  268,
  256,  256,  260,  268,  269,  269,  271,  271,  273,  273,
  266,  272,  273,  273,   33,  270,   35,  273,  273,   39,
  266,  266,  268,  269,  270,  271,  272,  265,  258,  267,
  260,  258,  258,  260,  268,   55,  272,  270,  273,  270,
  257,  260,  274,  272,  268,  263,  258,  263,   12,   41,
   59,   24,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,
   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,
   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,
   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,
   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,
   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,
   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,
   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,
   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,
   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,
   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,
   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,
   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,
   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,
   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,
   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,
   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,
   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,
   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,
   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,   -1,
   -1,   -1,   -1,   -1,   -1,  265,   -1,  267,
};
#define YYFINAL 3
#ifndef YYDEBUG
#define YYDEBUG 0
#endif
#define YYMAXTOKEN 274
#if YYDEBUG
char *yyname[] = {
"end-of-file",0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,"EQ","COLON","DOT","SEMICOLON",
"SPACE","HTAB","LINESEP","NEWLINE","BEGIN_VCARD","END_VCARD","BEGIN_VCAL",
"END_VCAL","BEGIN_VEVENT","END_VEVENT","BEGIN_VTODO","END_VTODO","ID","STRING",
};
char *yyrule[] = {
"$accept : mime",
"mime : vobjects",
"$$1 :",
"vobjects : vobject $$1 vobjects",
"vobjects : vobject",
"vobject : vcard",
"vobject : vcal",
"$$2 :",
"vcard : BEGIN_VCARD $$2 items END_VCARD",
"$$3 :",
"vcard : BEGIN_VCARD $$3 END_VCARD",
"items : item items",
"items : item",
"$$4 :",
"item : prop COLON $$4 values LINESEP",
"item : error",
"$$5 :",
"prop : name $$5 attr_params",
"prop : name",
"attr_params : attr_param attr_params",
"attr_params : attr_param",
"attr_param : SEMICOLON attr",
"attr : name",
"attr : name EQ name",
"name : ID",
"$$6 :",
"values : value SEMICOLON $$6 values",
"values : value",
"value : STRING",
"value :",
"$$7 :",
"vcal : BEGIN_VCAL $$7 calitems END_VCAL",
"$$8 :",
"vcal : BEGIN_VCAL $$8 END_VCAL",
"calitems : calitem calitems",
"calitems : calitem",
"calitem : eventitem",
"calitem : todoitem",
"calitem : items",
"$$9 :",
"eventitem : BEGIN_VEVENT $$9 items END_VEVENT",
"$$10 :",
"eventitem : BEGIN_VEVENT $$10 END_VEVENT",
"$$11 :",
"todoitem : BEGIN_VTODO $$11 items END_VTODO",
"$$12 :",
"todoitem : BEGIN_VTODO $$12 END_VTODO",
};
#endif
#if YYDEBUG
#include <stdio.h>
#endif

/* define the initial stack-sizes */
#ifdef YYSTACKSIZE
#undef YYMAXDEPTH
#define YYMAXDEPTH  YYSTACKSIZE
#else
#ifdef YYMAXDEPTH
#define YYSTACKSIZE YYMAXDEPTH
#else
#define YYSTACKSIZE 500
#define YYMAXDEPTH  500
#endif
#endif

#define YYINITSTACKSIZE 500

int      yydebug;
int      yynerrs;
int      yyerrflag;
int      yychar;
short   *yyssp;
YYSTYPE *yyvsp;
YYSTYPE  yyval;
YYSTYPE  yylval;

/* variables for the parser stack */
static short   *yyss;
static short   *yysslim;
static YYSTYPE *yyvs;
static int      yystacksize;
static int pushVObject(const char *prop)
    {
    VObject *newObj;
    if (ObjStackTop == MAXLEVEL)
      return FALSE;

    ObjStack[++ObjStackTop] = curObj;

    if (curObj) {
        newObj = addProp(curObj,prop);
        curObj = newObj;
      }
    else
      curObj = newVObject(prop);

    return TRUE;
    }


/* This pops the recently built vCard off the stack and returns it. */
static VObject* popVObject()
    {
    VObject *oldObj;
    if (ObjStackTop < 0) {
      yyerror("pop on empty Object Stack\n");
      return 0;
      }
    oldObj = curObj;
    curObj = ObjStack[ObjStackTop--];

    return oldObj;
    }


static void enterValues(const char *value)
    {
    if (fieldedProp && *fieldedProp) {
      if (value) {
          addPropValue(curProp,*fieldedProp,value);
          }
      /* else this field is empty, advance to next field */
      fieldedProp++;
      }
    else {
      if (value) {
          char *p1, *p2;
          wchar_t *p3;
          int i;

          /* If the property already has a string value, we append this one,
             using ';' to separate the values. */
          if (vObjectUStringZValue(curProp)) {
            p1 = fakeCString(vObjectUStringZValue(curProp));
            i = strlen(p1)+strlen(value)+2;
            p2 = malloc(i);
            snprintf(p2,i,"%s;%s",p1,value);
            deleteStr(p1);
            p3 = (wchar_t *) vObjectUStringZValue(curProp);
            free(p3);
            setVObjectUStringZValue_(curProp,fakeUnicode(p2,0));
            deleteStr(p2);
          } else {
          setVObjectUStringZValue_(curProp,fakeUnicode(value,0));
          }
      }
    }
    deleteStr(value);
    }

static void enterProps(const char *s)
    {
    curProp = addGroup(curObj,s);
    deleteStr(s);
    }

static void enterAttr(const char *s1, const char *s2)
    {
    const char *p1, *p2 = NULL;
    p1 = lookupProp_(s1);
    if (s2) {
      VObject *a;
      p2 = lookupProp_(s2);
      a = addProp(curProp,p1);
      setVObjectStringZValue(a,p2);
      }
    else
      addProp(curProp,p1);
    if (stricmp(p1,VCBase64Prop) == 0 || (s2 && stricmp(p2,VCBase64Prop)==0))
      lexPushMode(L_BASE64);
    else if (stricmp(p1,VCQuotedPrintableProp) == 0
          || (s2 && stricmp(p2,VCQuotedPrintableProp)==0))
      lexPushMode(L_QUOTED_PRINTABLE);
    deleteStr(s1); deleteStr(s2);
    }


#define MAX_LEX_LOOKAHEAD_0 32
#define MAX_LEX_LOOKAHEAD 64
#define MAX_LEX_MODE_STACK_SIZE 10
#define LEXMODE() (lexBuf.lexModeStack[lexBuf.lexModeStackTop])

struct LexBuf {
      /* input */
#ifdef INCLUDEMFC
    CFile *inputFile;
#else
    FILE *inputFile;
#endif
    char *inputString;
    unsigned long curPos;
    unsigned long inputLen;
      /* lookahead buffer */
      /*   -- lookahead buffer is short instead of char so that EOF
       /      can be represented correctly.
      */
    unsigned long len;
    short buf[MAX_LEX_LOOKAHEAD];
    unsigned long getPtr;
      /* context stack */
    unsigned long lexModeStackTop;
    enum LexMode lexModeStack[MAX_LEX_MODE_STACK_SIZE];
      /* token buffer */
    unsigned long maxToken;
    char *strs;
    unsigned long strsLen;
    } lexBuf;

static void lexPushMode(enum LexMode mode)
    {
    if (lexBuf.lexModeStackTop == (MAX_LEX_MODE_STACK_SIZE-1))
      yyerror("lexical context stack overflow");
    else {
      lexBuf.lexModeStack[++lexBuf.lexModeStackTop] = mode;
      }
    }

static void lexPopMode(int top)
    {
    /* special case of pop for ease of error recovery -- this
      version will never underflow */
    if (top)
      lexBuf.lexModeStackTop = 0;
    else
      if (lexBuf.lexModeStackTop > 0) lexBuf.lexModeStackTop--;
    }

static int lexWithinMode(enum LexMode mode) {
    unsigned long i;
    for (i=0;i<lexBuf.lexModeStackTop;i++)
      if (mode == lexBuf.lexModeStack[i]) return 1;
    return 0;
    }

static char lexGetc_()
    {
    /* get next char from input, no buffering. */
    if (lexBuf.curPos == lexBuf.inputLen)
      return EOF;
    else if (lexBuf.inputString)
      return *(lexBuf.inputString + lexBuf.curPos++);
    else {
#ifdef INCLUDEMFC
      char result;
      return lexBuf.inputFile->Read(&result, 1) == 1 ? result : EOF;
#else
      return fgetc(lexBuf.inputFile);
#endif
      }
    }

static int lexGeta()
    {
    ++lexBuf.len;
    return (lexBuf.buf[lexBuf.getPtr] = lexGetc_());
    }

static int lexGeta_(int i)
    {
    ++lexBuf.len;
    return (lexBuf.buf[(lexBuf.getPtr+i)%MAX_LEX_LOOKAHEAD] = lexGetc_());
    }

static void lexSkipLookahead() {
    if (lexBuf.len > 0 && lexBuf.buf[lexBuf.getPtr]!=EOF) {
      /* don't skip EOF. */
        lexBuf.getPtr = (lexBuf.getPtr + 1) % MAX_LEX_LOOKAHEAD;
      lexBuf.len--;
        }
    }

static int lexLookahead() {
    int c = (lexBuf.len)?
      lexBuf.buf[lexBuf.getPtr]:
      lexGeta();
    /* do the \r\n -> \n or \r -> \n translation here */
    if (c == '\r') {
      int a = (lexBuf.len>1)?
          lexBuf.buf[(lexBuf.getPtr+1)%MAX_LEX_LOOKAHEAD]:
          lexGeta_(1);
      if (a == '\n') {
          lexSkipLookahead();
          }
      lexBuf.buf[lexBuf.getPtr] = c = '\n';
      }
    else if (c == '\n') {
      int a = (lexBuf.len>1)?
          lexBuf.buf[lexBuf.getPtr+1]:
          lexGeta_(1);
      if (a == '\r') {
          lexSkipLookahead();
          }
      lexBuf.buf[lexBuf.getPtr] = '\n';
      }
    return c;
    }

static int lexGetc() {
    int c = lexLookahead();
    if (lexBuf.len > 0 && lexBuf.buf[lexBuf.getPtr]!=EOF) {
      /* EOF will remain in lookahead buffer */
        lexBuf.getPtr = (lexBuf.getPtr + 1) % MAX_LEX_LOOKAHEAD;
      lexBuf.len--;
        }
    return c;
    }

static void lexSkipLookaheadWord() {
    if (lexBuf.strsLen <= lexBuf.len) {
      lexBuf.len -= lexBuf.strsLen;
      lexBuf.getPtr = (lexBuf.getPtr + lexBuf.strsLen) % MAX_LEX_LOOKAHEAD;
      }
    }

static void lexClearToken()
    {
    lexBuf.strsLen = 0;
    }

static void lexAppendc(int c)
    {
    lexBuf.strs[lexBuf.strsLen] = c;
    /* append up to zero termination */
    if (c == 0) return;
    lexBuf.strsLen++;
    if (lexBuf.strsLen >= lexBuf.maxToken) {
      /* double the token string size */
      lexBuf.maxToken <<= 1;
      lexBuf.strs = (char*) realloc(lexBuf.strs,(size_t)lexBuf.maxToken);
      }
    }

static char* lexStr() {
    return dupStr(lexBuf.strs,(size_t)lexBuf.strsLen+1);
    }

static void lexSkipWhite() {
    int c = lexLookahead();
    while (c == ' ' || c == '\t') {
      lexSkipLookahead();
      c = lexLookahead();
      }
    }

static char* lexGetWord() {
    int c;
    lexSkipWhite();
    lexClearToken();
    c = lexLookahead();
    while (c != EOF && !strchr("\t\n ;:=",c)) {
      lexAppendc(c);
      lexSkipLookahead();
      c = lexLookahead();
      }
    lexAppendc(0);
    return lexStr();
    }

static void lexPushLookaheadc(int c) {
    int putptr;
    /* can't putback EOF, because it never leaves lookahead buffer */
    if (c == EOF) return;
    putptr = (int)lexBuf.getPtr - 1;
    if (putptr < 0) putptr += MAX_LEX_LOOKAHEAD;
    lexBuf.getPtr = putptr;
    lexBuf.buf[putptr] = c;
    lexBuf.len += 1;
    }

static char* lexLookaheadWord() {
    /* this function can lookahead word with max size of MAX_LEX_LOOKAHEAD_0
     /  and thing bigger than that will stop the lookahead and return 0;
     / leading white spaces are not recoverable.
     */
    int c;
    int len = 0;
    int curgetptr = 0;
    lexSkipWhite();
    lexClearToken();
    curgetptr = (int)lexBuf.getPtr; /* remember! */
    while (len < (MAX_LEX_LOOKAHEAD_0)) {
      c = lexGetc();
      len++;
      if (c == EOF || strchr("\t\n ;:=", c)) {
          lexAppendc(0);
          /* restore lookahead buf. */
          lexBuf.len += len;
          lexBuf.getPtr = curgetptr;
          return lexStr();
          }
        else
          lexAppendc(c);
      }
    lexBuf.len += len;  /* char that has been moved to lookahead buffer */
    lexBuf.getPtr = curgetptr;
    return 0;
    }

#ifdef _SUPPORT_LINE_FOLDING
static void handleMoreRFC822LineBreak(int c) {
    /* suport RFC 822 line break in cases like
     *      ADR: foo;
     *    morefoo;
     *    more foo;
     */
    if (c == ';') {
      int a;
      lexSkipLookahead();
      /* skip white spaces */
      a = lexLookahead();
      while (a == ' ' || a == '\t') {
          lexSkipLookahead();
          a = lexLookahead();
          }
      if (a == '\n') {
          lexSkipLookahead();
          a = lexLookahead();
          if (a == ' ' || a == '\t') {
            /* continuation, throw away all the \n and spaces read so
             * far
             */
            lexSkipWhite();
            lexPushLookaheadc(';');
            }
          else {
            lexPushLookaheadc('\n');
            lexPushLookaheadc(';');
            }
          }
      else {
          lexPushLookaheadc(';');
          }
      }
    }

static char* lexGet1Value() {
    int c;
    lexSkipWhite();
    c = lexLookahead();
    lexClearToken();
    while (c != EOF && c != ';') {
      if (c == '\n') {
          int a;
          lexSkipLookahead();
          a  = lexLookahead();
          if (a == ' ' || a == '\t') {
            lexAppendc(' ');
            lexSkipLookahead();
            }
          else {
            lexPushLookaheadc('\n');
            break;
            }
          }
      else {
          lexAppendc(c);
          lexSkipLookahead();
          }
      c = lexLookahead();
      }
    lexAppendc(0);
    handleMoreRFC822LineBreak(c);
    return c==EOF?0:lexStr();
    }
#endif


static int match_begin_name(int end) {
    char *n = lexLookaheadWord();
    int token = ID;
    if (n) {
      if (!stricmp(n,"vcard")) token = end?END_VCARD:BEGIN_VCARD;
      else if (!stricmp(n,"vcalendar")) token = end?END_VCAL:BEGIN_VCAL;
      else if (!stricmp(n,"vevent")) token = end?END_VEVENT:BEGIN_VEVENT;
      else if (!stricmp(n,"vtodo")) token = end?END_VTODO:BEGIN_VTODO;
      deleteStr(n);
      return token;
      }
    return 0;
    }


#ifdef INCLUDEMFC
void initLex(const char *inputstring, unsigned long inputlen, CFile *inputfile)
#else
void initLex(const char *inputstring, unsigned long inputlen, FILE *inputfile)
#endif
    {
    /* initialize lex mode stack */
    lexBuf.lexModeStack[lexBuf.lexModeStackTop=0] = L_NORMAL;

    /* iniatialize lex buffer. */
    lexBuf.inputString = (char*) inputstring;
    lexBuf.inputLen = inputlen;
    lexBuf.curPos = 0;
    lexBuf.inputFile = inputfile;

    lexBuf.len = 0;
    lexBuf.getPtr = 0;

    lexBuf.maxToken = MAXTOKEN;
    lexBuf.strs = (char*)malloc(MAXTOKEN);
    lexBuf.strsLen = 0;

    }

static void finiLex() {
    free(lexBuf.strs);
    }


/* This parses and converts the base64 format for binary encoding into
 * a decoded buffer (allocated with new).  See RFC 1521.
 */
static char * lexGetDataFromBase64()
    {
    unsigned long bytesLen = 0, bytesMax = 0;
    int quadIx = 0, pad = 0;
    unsigned long trip = 0;
    unsigned char b;
    int c;
    unsigned char *bytes = NULL;
    unsigned char *oldBytes = NULL;

    DBG_(("db: lexGetDataFromBase64\n"));
    while (1) {
      c = lexGetc();
      if (c == '\n') {
          ++mime_lineNum;
          if (lexLookahead() == '\n') {
            /* a '\n' character by itself means end of data */
            break;
            }
          else continue; /* ignore '\n' */
          }
      else {
          if ((c >= 'A') && (c <= 'Z'))
            b = (unsigned char)(c - 'A');
          else if ((c >= 'a') && (c <= 'z'))
            b = (unsigned char)(c - 'a') + 26;
          else if ((c >= '0') && (c <= '9'))
            b = (unsigned char)(c - '0') + 52;
          else if (c == '+')
            b = 62;
          else if (c == '/')
            b = 63;
          else if (c == '=') {
            b = 0;
            pad++;
          } else if ((c == ' ') || (c == '\t')) {
            continue;
          } else { /* error condition */
            if (bytes) free(bytes);
            else if (oldBytes) free(oldBytes);
            /* error recovery: skip until 2 adjacent newlines. */
            DBG_(("db: invalid character 0x%x '%c'\n", c,c));
            if (c != EOF)  {
                c = lexGetc();
                while (c != EOF) {
                  if (c == '\n' && lexLookahead() == '\n') {
                      ++mime_lineNum;
                      break;
                      }
                  c = lexGetc();
                  }
                }
            return NULL;
            }
          trip = (trip << 6) | b;
          if (++quadIx == 4) {
            unsigned char outBytes[3];
            int numOut;
            int i;
            for (i = 0; i < 3; i++) {
                outBytes[2-i] = (unsigned char)(trip & 0xFF);
                trip >>= 8;
                }
            numOut = 3 - pad;
            if (bytesLen + numOut > bytesMax) {
                if (!bytes) {
                  bytesMax = 1024;
                  bytes = (unsigned char*)malloc((size_t)bytesMax);
                  }
                else {
                  bytesMax <<= 2;
                  oldBytes = bytes;
                  bytes = (unsigned char*)realloc(bytes,(size_t)bytesMax);
                  }
                if (bytes == 0) {
                  mime_error("out of memory while processing BASE64 data\n");
                  }
                }
            if (bytes) {
                memcpy(bytes + bytesLen, outBytes, numOut);
                bytesLen += numOut;
                }
            trip = 0;
            quadIx = 0;
            }
          }
      } /* while */
    DBG_(("db: bytesLen = %d\n",  bytesLen));
    /* kludge: all this won't be necessary if we have tree form
      representation */
    if (bytes) {
      setValueWithSize(curProp,bytes,(unsigned int)bytesLen);
      free(bytes);
      }
    else if (oldBytes) {
      setValueWithSize(curProp,oldBytes,(unsigned int)bytesLen);
      free(oldBytes);
      }
    return 0;
    }

static int match_begin_end_name(int end) {
    int token;
    lexSkipWhite();
    if (lexLookahead() != ':') return ID;
    lexSkipLookahead();
    lexSkipWhite();
    token = match_begin_name(end);
    if (token == ID) {
      lexPushLookaheadc(':');
      DBG_(("db: ID '%s'\n", yylval.str));
      return ID;
      }
    else if (token != 0) {
      lexSkipLookaheadWord();
      deleteStr(yylval.str);
      DBG_(("db: begin/end %d\n", token));
      return token;
      }
    return 0;
    }

static char* lexGetQuotedPrintable()
    {
    char cur;

    lexClearToken();
    do {
      cur = lexGetc();
      switch (cur) {
          case '=': {
            int c = 0;
            int next[2];
            int i;
            for (i = 0; i < 2; i++) {
                next[i] = lexGetc();
                if (next[i] >= '0' && next[i] <= '9')
                  c = c * 16 + next[i] - '0';
                else if (next[i] >= 'A' && next[i] <= 'F')
                  c = c * 16 + next[i] - 'A' + 10;
                else
                  break;
                }
            if (i == 0) {
                /* single '=' follow by LINESEP is continuation sign? */
                if (next[0] == '\n') {
                  ++mime_lineNum;
                  }
                else {
                  lexPushLookaheadc('=');
                  goto EndString;
                  }
                }
            else if (i == 1) {
                lexPushLookaheadc(next[1]);
                lexPushLookaheadc(next[0]);
                lexAppendc('=');
            } else {
                lexAppendc(c);
                }
            break;
            } /* '=' */
          case '\n': {
            lexPushLookaheadc('\n');
            goto EndString;
            }
          case (char)EOF:
            break;
          default:
            lexAppendc(cur);
            break;
          } /* switch */
      } while (cur != (char)EOF);

EndString:
    lexAppendc(0);
    return lexStr();
    } /* LexQuotedPrintable */

int yylex() {

    int lexmode = LEXMODE();
    if (lexmode == L_VALUES) {
      int c = lexGetc();
      if (c == ';') {
          DBG_(("db: SEMICOLON\n"));
          lexPushLookaheadc(c);
#ifdef _SUPPORT_LINE_FOLDING
          handleMoreRFC822LineBreak(c);
#endif
          lexSkipLookahead();
          return SEMICOLON;
          }
      else if (strchr("\n",c)) {
          ++mime_lineNum;
          /* consume all line separator(s) adjacent to each other */
          c = lexLookahead();
          while (strchr("\n",c)) {
            lexSkipLookahead();
            c = lexLookahead();
            ++mime_lineNum;
            }
          DBG_(("db: LINESEP\n"));
          return LINESEP;
          }
      else {
          char *p = 0;
          lexPushLookaheadc(c);
          if (lexWithinMode(L_BASE64)) {
            /* get each char and convert to bin on the fly... */
            p = lexGetDataFromBase64();
            yylval.str = p;
            return STRING;
            }
          else if (lexWithinMode(L_QUOTED_PRINTABLE)) {
            p = lexGetQuotedPrintable();
            }
          else {
#ifdef _SUPPORT_LINE_FOLDING
            p = lexGet1Value();
#else
            p = lexGetStrUntil(";\n");
#endif
            }
          if (p) {
            DBG_(("db: STRING: '%s'\n", p));
            yylval.str = p;
            return STRING;
            }
          else return 0;
          }
      }
    else {
      /* normal mode */
      while (1) {
          int c = lexGetc();
          switch(c) {
            case ':': {
                /* consume all line separator(s) adjacent to each other */
                /* ignoring linesep immediately after colon. */
/*              c = lexLookahead();
                while (strchr("\n",c)) {
                  lexSkipLookahead();
                  c = lexLookahead();
                  ++mime_lineNum;
                  }*/
                DBG_(("db: COLON\n"));
                return COLON;
                }
            case ';':
                DBG_(("db: SEMICOLON\n"));
                return SEMICOLON;
            case '=':
                DBG_(("db: EQ\n"));
                return EQ;
            /* ignore whitespace in this mode */
            case '\t':
            case ' ': continue;
            case '\n': {
                ++mime_lineNum;
                continue;
                }
            case EOF: return 0;
                break;
            default: {
                lexPushLookaheadc(c);
                if (isalpha(c)) {
                  char *t = lexGetWord();
                  yylval.str = t;
                  if (!stricmp(t, "begin")) {
                      return match_begin_end_name(0);
                      }
                  else if (!stricmp(t,"end")) {
                      return match_begin_end_name(1);
                      }
                    else {
                      DBG_(("db: ID '%s'\n", t));
                      return ID;
                      }
                  }
                else {
                  /* unknow token */
                  return 0;
                  }
                break;
                }
            }
          }
      }
    return 0;
    }


/***************************************************************************/
/***                                      Public Functions                                ****/
/***************************************************************************/

static VObject* Parse_MIMEHelper()
    {
    ObjStackTop = -1;
    mime_numErrors = 0;
    mime_lineNum = 1;
    vObjList = 0;
    curObj = 0;

    if (yyparse() != 0)
      return 0;

    finiLex();
    return vObjList;
    }

DLLEXPORT(VObject*) Parse_MIME(const char *input, unsigned long len)
    {
    initLex(input, len, 0);
    return Parse_MIMEHelper();
    }


#if INCLUDEMFC

DLLEXPORT(VObject*) Parse_MIME_FromFile(CFile *file)
    {
    unsigned long startPos;
    VObject *result;

    initLex(0,-1,file);
    startPos = file->GetPosition();
    if (!(result = Parse_MIMEHelper()))
      file->Seek(startPos, CFile::begin);
    return result;
    }

#else

VObject* Parse_MIME_FromFile(FILE *file)
    {
    VObject *result;
    long startPos;

    initLex(0,(unsigned long)-1,file);
    startPos = ftell(file);
    if (!(result = Parse_MIMEHelper())) {
      if (startPos >= 0)
         fseek(file,startPos,SEEK_SET);
      }
    return result;
    }

DLLEXPORT(VObject*) Parse_MIME_FromFileName(char *fname)
    {
    FILE *fp = fopen(fname,"r");
    if (fp) {
      VObject* o = Parse_MIME_FromFile(fp);
      fclose(fp);
      return o;
      }
    else {
      char msg[256];
      snprintf(msg, sizeof(msg), "can't open file '%s' for reading\n", fname);
      mime_error_(msg);
      return 0;
      }
    }

#endif


static MimeErrorHandler mimeErrorHandler;

DLLEXPORT(void) registerMimeErrorHandler(MimeErrorHandler me)
    {
    mimeErrorHandler = me;
    }

static void mime_error(char *s)
    {
    char msg[256];
    if (mimeErrorHandler) {
      snprintf(msg,sizeof(msg),"%s at line %d", s, mime_lineNum);
      mimeErrorHandler(msg);
      }
    }

static void mime_error_(char *s)
    {
    if (mimeErrorHandler) {
      mimeErrorHandler(s);
      }
    }

/* allocate initial stack or double stack size, up to YYMAXDEPTH */
static int yygrowstack(void)
{
    int newsize, i;
    short *newss;
    YYSTYPE *newvs;

    if ((newsize = yystacksize) == 0)
        newsize = YYINITSTACKSIZE;
    else if (newsize >= YYMAXDEPTH)
        return -1;
    else if ((newsize *= 2) > YYMAXDEPTH)
        newsize = YYMAXDEPTH;

    i = yyssp - yyss;
    newss = (yyss != 0)
          ? (short *)realloc(yyss, newsize * sizeof(*newss))
          : (short *)malloc(newsize * sizeof(*newss));
    if (newss == 0)
        return -1;

    yyss  = newss;
    yyssp = newss + i;
    newvs = (yyvs != 0)
          ? (YYSTYPE *)realloc(yyvs, newsize * sizeof(*newvs))
          : (YYSTYPE *)malloc(newsize * sizeof(*newvs));
    if (newvs == 0)
        return -1;

    yyvs = newvs;
    yyvsp = newvs + i;
    yystacksize = newsize;
    yysslim = yyss + newsize - 1;
    return 0;
}

#define YYABORT goto yyabort
#define YYREJECT goto yyabort
#define YYACCEPT goto yyaccept
#define YYERROR goto yyerrlab
int
yyparse(void)
{
    register int yym, yyn, yystate;
#if YYDEBUG
    register const char *yys;

    if ((yys = getenv("YYDEBUG")) != 0)
    {
        yyn = *yys;
        if (yyn >= '0' && yyn <= '9')
            yydebug = yyn - '0';
    }
#endif

    yynerrs = 0;
    yyerrflag = 0;
    yychar = YYEMPTY;

    if (yyss == NULL && yygrowstack()) goto yyoverflow;
    yyssp = yyss;
    yyvsp = yyvs;
    *yyssp = yystate = 0;

yyloop:
    if ((yyn = yydefred[yystate]) != 0) goto yyreduce;
    if (yychar < 0)
    {
        if ((yychar = yylex()) < 0) yychar = 0;
#if YYDEBUG
        if (yydebug)
        {
            yys = 0;
            if (yychar <= YYMAXTOKEN) yys = yyname[yychar];
            if (!yys) yys = "illegal-symbol";
            printf("%sdebug: state %d, reading %d (%s)\n",
                    YYPREFIX, yystate, yychar, yys);
        }
#endif
    }
    if ((yyn = yysindex[yystate]) && (yyn += yychar) >= 0 &&
            yyn <= YYTABLESIZE && yycheck[yyn] == yychar)
    {
#if YYDEBUG
        if (yydebug)
            printf("%sdebug: state %d, shifting to state %d\n",
                    YYPREFIX, yystate, yytable[yyn]);
#endif
        if (yyssp >= yysslim && yygrowstack())
        {
            goto yyoverflow;
        }
        *++yyssp = yystate = yytable[yyn];
        *++yyvsp = yylval;
        yychar = YYEMPTY;
        if (yyerrflag > 0)  --yyerrflag;
        goto yyloop;
    }
    if ((yyn = yyrindex[yystate]) && (yyn += yychar) >= 0 &&
            yyn <= YYTABLESIZE && yycheck[yyn] == yychar)
    {
        yyn = yytable[yyn];
        goto yyreduce;
    }
    if (yyerrflag) goto yyinrecovery;

    yyerror("syntax error");

#ifdef lint
    goto yyerrlab;
#endif

yyerrlab:
    ++yynerrs;

yyinrecovery:
    if (yyerrflag < 3)
    {
        yyerrflag = 3;
        for (;;)
        {
            if ((yyn = yysindex[*yyssp]) && (yyn += YYERRCODE) >= 0 &&
                    yyn <= YYTABLESIZE && yycheck[yyn] == YYERRCODE)
            {
#if YYDEBUG
                if (yydebug)
                    printf("%sdebug: state %d, error recovery shifting\
 to state %d\n", YYPREFIX, *yyssp, yytable[yyn]);
#endif
                if (yyssp >= yysslim && yygrowstack())
                {
                    goto yyoverflow;
                }
                *++yyssp = yystate = yytable[yyn];
                *++yyvsp = yylval;
                goto yyloop;
            }
            else
            {
#if YYDEBUG
                if (yydebug)
                    printf("%sdebug: error recovery discarding state %d\n",
                            YYPREFIX, *yyssp);
#endif
                if (yyssp <= yyss) goto yyabort;
                --yyssp;
                --yyvsp;
            }
        }
    }
    else
    {
        if (yychar == 0) goto yyabort;
#if YYDEBUG
        if (yydebug)
        {
            yys = 0;
            if (yychar <= YYMAXTOKEN) yys = yyname[yychar];
            if (!yys) yys = "illegal-symbol";
            printf("%sdebug: state %d, error recovery discards token %d (%s)\n",
                    YYPREFIX, yystate, yychar, yys);
        }
#endif
        yychar = YYEMPTY;
        goto yyloop;
    }

yyreduce:
#if YYDEBUG
    if (yydebug)
        printf("%sdebug: state %d, reducing by rule %d (%s)\n",
                YYPREFIX, yystate, yyn, yyrule[yyn]);
#endif
    yym = yylen[yyn];
    if (yym)
        yyval = yyvsp[1-yym];
    else
        memset(&yyval, 0, sizeof yyval);
    switch (yyn)
    {
case 2:
{ addList(&vObjList, yyvsp[0].vobj); curObj = 0; }
break;
case 4:
{ addList(&vObjList, yyvsp[0].vobj); curObj = 0; }
break;
case 7:
{
      lexPushMode(L_VCARD);
      if (!pushVObject(VCCardProp)) YYERROR;
      }
break;
case 8:
{
      lexPopMode(0);
      yyval.vobj = popVObject();
      }
break;
case 9:
{
      lexPushMode(L_VCARD);
      if (!pushVObject(VCCardProp)) YYERROR;
      }
break;
case 10:
{
      lexPopMode(0);
      yyval.vobj = popVObject();
      }
break;
case 13:
{
      lexPushMode(L_VALUES);
      }
break;
case 14:
{
      if (lexWithinMode(L_BASE64) || lexWithinMode(L_QUOTED_PRINTABLE))
         lexPopMode(0);
      lexPopMode(0);
      }
break;
case 16:
{
      enterProps(yyvsp[0].str);
      }
break;
case 18:
{
      enterProps(yyvsp[0].str);
      }
break;
case 22:
{
      enterAttr(yyvsp[0].str,0);
      }
break;
case 23:
{
      enterAttr(yyvsp[-2].str,yyvsp[0].str);

      }
break;
case 25:
{ enterValues(yyvsp[-1].str); }
break;
case 27:
{ enterValues(yyvsp[0].str); }
break;
case 29:
{ yyval.str = 0; }
break;
case 30:
{ if (!pushVObject(VCCalProp)) YYERROR; }
break;
case 31:
{ yyval.vobj = popVObject(); }
break;
case 32:
{ if (!pushVObject(VCCalProp)) YYERROR; }
break;
case 33:
{ yyval.vobj = popVObject(); }
break;
case 39:
{
      lexPushMode(L_VEVENT);
      if (!pushVObject(VCEventProp)) YYERROR;
      }
break;
case 40:
{
      lexPopMode(0);
      popVObject();
      }
break;
case 41:
{
      lexPushMode(L_VEVENT);
      if (!pushVObject(VCEventProp)) YYERROR;
      }
break;
case 42:
{
      lexPopMode(0);
      popVObject();
      }
break;
case 43:
{
      lexPushMode(L_VTODO);
      if (!pushVObject(VCTodoProp)) YYERROR;
      }
break;
case 44:
{
      lexPopMode(0);
      popVObject();
      }
break;
case 45:
{
      lexPushMode(L_VTODO);
      if (!pushVObject(VCTodoProp)) YYERROR;
      }
break;
case 46:
{
      lexPopMode(0);
      popVObject();
      }
break;
    }
    yyssp -= yym;
    yystate = *yyssp;
    yyvsp -= yym;
    yym = yylhs[yyn];
    if (yystate == 0 && yym == 0)
    {
#if YYDEBUG
        if (yydebug)
            printf("%sdebug: after reduction, shifting from state 0 to\
 state %d\n", YYPREFIX, YYFINAL);
#endif
        yystate = YYFINAL;
        *++yyssp = YYFINAL;
        *++yyvsp = yyval;
        if (yychar < 0)
        {
            if ((yychar = yylex()) < 0) yychar = 0;
#if YYDEBUG
            if (yydebug)
            {
                yys = 0;
                if (yychar <= YYMAXTOKEN) yys = yyname[yychar];
                if (!yys) yys = "illegal-symbol";
                printf("%sdebug: state %d, reading %d (%s)\n",
                        YYPREFIX, YYFINAL, yychar, yys);
            }
#endif
        }
        if (yychar == 0) goto yyaccept;
        goto yyloop;
    }
    if ((yyn = yygindex[yym]) && (yyn += yystate) >= 0 &&
            yyn <= YYTABLESIZE && yycheck[yyn] == yystate)
        yystate = yytable[yyn];
    else
        yystate = yydgoto[yym];
#if YYDEBUG
    if (yydebug)
        printf("%sdebug: after reduction, shifting from state %d \
to state %d\n", YYPREFIX, *yyssp, yystate);
#endif
    if (yyssp >= yysslim && yygrowstack())
    {
        goto yyoverflow;
    }
    *++yyssp = yystate;
    *++yyvsp = yyval;
    goto yyloop;

yyoverflow:
    yyerror("yacc stack overflow");

yyabort:
    return (1);

yyaccept:
    return (0);
}

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