/* Driver template for the LEMON parser generator.
   ** The author disclaims copyright to this source code.
   */
   /* First off, code is included that follows the "include" declaration
   ** in the input grammar file. */
   #include <stdio.h>
   %%
   /* Next is all token values, in a form suitable for use by makeheaders.
   ** This section will be null unless lemon is run with the -m switch.
  */
  /* 
  ** These constants (all generated automatically by the parser generator)
  ** specify the various kinds of tokens (terminals) that the parser
  ** understands. 
  **
  ** Each symbol here is a terminal symbol in the grammar.
  */
  %%
  /* Make sure the INTERFACE macro is defined.
  */
  #ifndef INTERFACE
  # define INTERFACE 1
  #endif
  /* The next thing included is series of defines which control
  ** various aspects of the generated parser.
  **    YYCODETYPE         is the data type used for storing terminal
  **                       and nonterminal numbers.  "unsigned char" is
  **                       used if there are fewer than 250 terminals
  **                       and nonterminals.  "int" is used otherwise.
  **    YYNOCODE           is a number of type YYCODETYPE which corresponds
  **                       to no legal terminal or nonterminal number.  This
  **                       number is used to fill in empty slots of the hash 
  **                       table.
  **    YYFALLBACK         If defined, this indicates that one or more tokens
  **                       have fall-back values which should be used if the
  **                       original value of the token will not parse.
  **    YYACTIONTYPE       is the data type used for storing terminal
  **                       and nonterminal numbers.  "unsigned char" is
  **                       used if there are fewer than 250 rules and
  **                       states combined.  "int" is used otherwise.
  **    ParseTOKENTYPE     is the data type used for minor tokens given 
  **                       directly to the parser from the tokenizer.
  **    YYMINORTYPE        is the data type used for all minor tokens.
  **                       This is typically a union of many types, one of
  **                       which is ParseTOKENTYPE.  The entry in the union
  **                       for base tokens is called "yy0".
  **    YYSTACKDEPTH       is the maximum depth of the parser's stack.  If
  **                       zero the stack is dynamically sized using realloc()
  **    ParseARG_SDECL     A static variable declaration for the %extra_argument
  **    ParseARG_PDECL     A parameter declaration for the %extra_argument
  **    ParseARG_STORE     Code to store %extra_argument into yypParser
  **    ParseARG_FETCH     Code to extract %extra_argument from yypParser
  **    YYNSTATE           the combined number of states.
  **    YYNRULE            the number of rules in the grammar
  **    YYERRORSYMBOL      is the code number of the error symbol.  If not
  **                       defined, then do no error processing.
  */
  %%
  #define YY_NO_ACTION      (YYNSTATE+YYNRULE+2)
  #define YY_ACCEPT_ACTION  (YYNSTATE+YYNRULE+1)
  #define YY_ERROR_ACTION   (YYNSTATE+YYNRULE)
  
  /* The yyzerominor constant is used to initialize instances of
  ** YYMINORTYPE objects to zero. */
  static const YYMINORTYPE yyzerominor = { 0 };
  
  /* Define the yytestcase() macro to be a no-op if is not already defined
  ** otherwise.
  **
  ** Applications can choose to define yytestcase() in the %include section
  ** to a macro that can assist in verifying code coverage.  For production
  ** code the yytestcase() macro should be turned off.  But it is useful
  ** for testing.
  */
  #ifndef yytestcase
  # define yytestcase(X)
  #endif
  
  
  /* Next are the tables used to determine what action to take based on the
  ** current state and lookahead token.  These tables are used to implement
  ** functions that take a state number and lookahead value and return an
  ** action integer.  
  **
  ** Suppose the action integer is N.  Then the action is determined as
  ** follows
  **
  **   0 <= N < YYNSTATE                  Shift N.  That is, push the lookahead
  **                                      token onto the stack and goto state N.
  **
  **   YYNSTATE <= N < YYNSTATE+YYNRULE   Reduce by rule N-YYNSTATE.
  **
  **   N == YYNSTATE+YYNRULE              A syntax error has occurred.
  **
  **   N == YYNSTATE+YYNRULE+1            The parser accepts its input.
  **
  **   N == YYNSTATE+YYNRULE+2            No such action.  Denotes unused
  **                                      slots in the yy_action[] table.
  **
 ** The action table is constructed as a single large table named yy_action[].
 ** Given state S and lookahead X, the action is computed as
 **
 **      yy_action[ yy_shift_ofst[S] + X ]
 **
 ** If the index value yy_shift_ofst[S]+X is out of range or if the value
 ** yy_lookahead[yy_shift_ofst[S]+X] is not equal to X or if yy_shift_ofst[S]
 ** is equal to YY_SHIFT_USE_DFLT, it means that the action is not in the table
 ** and that yy_default[S] should be used instead.  
 **
 ** The formula above is for computing the action when the lookahead is
 ** a terminal symbol.  If the lookahead is a non-terminal (as occurs after
 ** a reduce action) then the yy_reduce_ofst[] array is used in place of
 ** the yy_shift_ofst[] array and YY_REDUCE_USE_DFLT is used in place of
 ** YY_SHIFT_USE_DFLT.
 **
 ** The following are the tables generated in this section:
 **
 **  yy_action[]        A single table containing all actions.
 **  yy_lookahead[]     A table containing the lookahead for each entry in
 **                     yy_action.  Used to detect hash collisions.
 **  yy_shift_ofst[]    For each state, the offset into yy_action for
 **                     shifting terminals.
 **  yy_reduce_ofst[]   For each state, the offset into yy_action for
 **                     shifting non-terminals after a reduce.
 **  yy_default[]       Default action for each state.
 */
 %%
 
 /* The next table maps tokens into fallback tokens.  If a construct
 ** like the following:
 ** 
 **      %fallback ID X Y Z.
 **
 ** appears in the grammar, then ID becomes a fallback token for X, Y,
 ** and Z.  Whenever one of the tokens X, Y, or Z is input to the parser
 ** but it does not parse, the type of the token is changed to ID and
 ** the parse is retried before an error is thrown.
 */
 #ifdef YYFALLBACK
 static const YYCODETYPE yyFallback[] = {
 %%
 };
 #endif /* YYFALLBACK */
 
 /* The following structure represents a single element of the
 ** parser's stack.  Information stored includes:
 **
 **   +  The state number for the parser at this level of the stack.
 **
 **   +  The value of the token stored at this level of the stack.
 **      (In other words, the "major" token.)
 **
 **   +  The semantic value stored at this level of the stack.  This is
 **      the information used by the action routines in the grammar.
 **      It is sometimes called the "minor" token.
 */
 struct yyStackEntry {
   YYACTIONTYPE stateno;  /* The state-number */
   YYCODETYPE major;      /* The major token value.  This is the code
                          ** number for the token at this stack level */
   YYMINORTYPE minor;     /* The user-supplied minor token value.  This
                          ** is the value of the token  */
 };
 typedef struct yyStackEntry yyStackEntry;
 
 /* The state of the parser is completely contained in an instance of
 ** the following structure */
 struct yyParser {
   int yyidx;                    /* Index of top element in stack */
 #ifdef YYTRACKMAXSTACKDEPTH
   int yyidxMax;                 /* Maximum value of yyidx */
 #endif
   int yyerrcnt;                 /* Shifts left before out of the error */
   ParseARG_SDECL                /* A place to hold %extra_argument */
 #if YYSTACKDEPTH<=0
   int yystksz;                  /* Current side of the stack */
   yyStackEntry *yystack;        /* The parser's stack */
 #else
   yyStackEntry yystack[YYSTACKDEPTH];  /* The parser's stack */
 #endif
 };
 typedef struct yyParser yyParser;
 
 #ifndef NDEBUG
 #include <stdio.h>
 static FILE *yyTraceFILE = 0;
 static char *yyTracePrompt = 0;
 #endif /* NDEBUG */
 
 #ifndef NDEBUG
 /* 
 ** Turn parser tracing on by giving a stream to which to write the trace
 ** and a prompt to preface each trace message.  Tracing is turned off
 ** by making either argument NULL 
 **
 ** Inputs:
 ** <ul>
 ** <li> A FILE* to which trace output should be written.
 **      If NULL, then tracing is turned off.
 ** <li> A prefix string written at the beginning of every
 **      line of trace output.  If NULL, then tracing is
 **      turned off.
 ** </ul>
 **
 ** Outputs:
 ** None.
 */
 void ParseTrace(FILE *TraceFILE, char *zTracePrompt);
 void ParseTrace(FILE *TraceFILE, char *zTracePrompt){
   yyTraceFILE = TraceFILE;
   yyTracePrompt = zTracePrompt;
   if( yyTraceFILE==0 ) yyTracePrompt = 0;
   else if( yyTracePrompt==0 ) yyTraceFILE = 0;
 }
 #endif /* NDEBUG */
 
 #ifndef NDEBUG
 /* For tracing shifts, the names of all terminals and nonterminals
 ** are required.  The following table supplies these names */
 static const char *const yyTokenName[] = { 
 %%
 };
 #endif /* NDEBUG */
 
 #ifndef NDEBUG
 /* For tracing reduce actions, the names of all rules are required.
 */
 static const char *const yyRuleName[] = {
 %%
 };
 #endif /* NDEBUG */
 
 
 #if YYSTACKDEPTH<=0
 /*
 ** Try to increase the size of the parser stack.
 */
 static void yyGrowStack(yyParser *p){
   int newSize;
   yyStackEntry *pNew;
 
   newSize = p->yystksz*2 + 100;
   pNew = realloc(p->yystack, newSize*sizeof(pNew[0]));
   if( pNew ){
     p->yystack = pNew;
     p->yystksz = newSize;
 #ifndef NDEBUG
     if( yyTraceFILE ){
       fprintf(yyTraceFILE,"%sStack grows to %d entries!\n",
               yyTracePrompt, p->yystksz);
     }
 #endif
   }
 }
 #endif
 
 /* 
 ** This function allocates a new parser.
 ** The only argument is a pointer to a function which works like
 ** malloc.
 **
 ** Inputs:
 ** A pointer to the function used to allocate memory.
 **
 ** Outputs:
 ** A pointer to a parser.  This pointer is used in subsequent calls
 ** to Parse and ParseFree.
 */
 void *ParseAlloc(void *(*mallocProc)(size_t)){
   yyParser *pParser;
   pParser = (yyParser*)(*mallocProc)( (size_t)sizeof(yyParser) );
   if( pParser ){
     pParser->yyidx = -1;
 #ifdef YYTRACKMAXSTACKDEPTH
     pParser->yyidxMax = 0;
 #endif
 #if YYSTACKDEPTH<=0
     pParser->yystack = NULL;
     pParser->yystksz = 0;
     yyGrowStack(pParser);
 #endif
   }
   return pParser;
 }
 
 /* The following function deletes the value associated with a
 ** symbol.  The symbol can be either a terminal or nonterminal.
 ** "yymajor" is the symbol code, and "yypminor" is a pointer to
 ** the value.
 */
 static void yy_destructor(
   yyParser *yypParser,    /* The parser */
   YYCODETYPE yymajor,     /* Type code for object to destroy */
   YYMINORTYPE *yypminor   /* The object to be destroyed */
 ){
   ParseARG_FETCH;
   switch( yymajor ){
     /* Here is inserted the actions which take place when a
     ** terminal or non-terminal is destroyed.  This can happen
     ** when the symbol is popped from the stack during a
     ** reduce or during error processing or when a parser is 
     ** being destroyed before it is finished parsing.
     **
     ** Note: during a reduce, the only symbols destroyed are those
     ** which appear on the RHS of the rule, but which are not used
     ** inside the C code.
     */
 %%
     default:  break;   /* If no destructor action specified: do nothing */
   }
 }
 
 /*
 ** Pop the parser's stack once.
 **
 ** If there is a destructor routine associated with the token which
 ** is popped from the stack, then call it.
 **
 ** Return the major token number for the symbol popped.
 */
 static int yy_pop_parser_stack(yyParser *pParser){
   YYCODETYPE yymajor;
   yyStackEntry *yytos = &pParser->yystack[pParser->yyidx];
 
   if( pParser->yyidx<0 ) return 0;
 #ifndef NDEBUG
   if( yyTraceFILE && pParser->yyidx>=0 ){
     fprintf(yyTraceFILE,"%sPopping %s\n",
       yyTracePrompt,
       yyTokenName[yytos->major]);
   }
 #endif
   yymajor = yytos->major;
   yy_destructor(pParser, yymajor, &yytos->minor);
   pParser->yyidx--;
   return yymajor;
 }
 
 /* 
 ** Deallocate and destroy a parser.  Destructors are all called for
 ** all stack elements before shutting the parser down.
 **
 ** Inputs:
 ** <ul>
 ** <li>  A pointer to the parser.  This should be a pointer
 **       obtained from ParseAlloc.
 ** <li>  A pointer to a function used to reclaim memory obtained
 **       from malloc.
 ** </ul>
 */
 void ParseFree(
   void *p,                    /* The parser to be deleted */
   void (*freeProc)(void*)     /* Function used to reclaim memory */
 ){
   yyParser *pParser = (yyParser*)p;
   if( pParser==0 ) return;
   while( pParser->yyidx>=0 ) yy_pop_parser_stack(pParser);
 #if YYSTACKDEPTH<=0
   free(pParser->yystack);
 #endif
   (*freeProc)((void*)pParser);
 }
 
 /*
 ** Return the peak depth of the stack for a parser.
 */
 #ifdef YYTRACKMAXSTACKDEPTH
 int ParseStackPeak(void *p){
   yyParser *pParser = (yyParser*)p;
   return pParser->yyidxMax;
 }
 #endif
 
 /*
 ** Find the appropriate action for a parser given the terminal
 ** look-ahead token iLookAhead.
 **
 ** If the look-ahead token is YYNOCODE, then check to see if the action is
 ** independent of the look-ahead.  If it is, return the action, otherwise
 ** return YY_NO_ACTION.
 */
 static int yy_find_shift_action(
   yyParser *pParser,        /* The parser */
   YYCODETYPE iLookAhead     /* The look-ahead token */
 ){
   int i;
   int stateno = pParser->yystack[pParser->yyidx].stateno;
  
   if( stateno>YY_SHIFT_COUNT
    || (i = yy_shift_ofst[stateno])==YY_SHIFT_USE_DFLT ){
     return yy_default[stateno];
   }
   assert( iLookAhead!=YYNOCODE );
   i += iLookAhead;
   if( i<0 || i>=YY_ACTTAB_COUNT || yy_lookahead[i]!=iLookAhead ){
     if( iLookAhead>0 ){
 #ifdef YYFALLBACK
       YYCODETYPE iFallback;            /* Fallback token */
       if( iLookAhead<sizeof(yyFallback)/sizeof(yyFallback[0])
              && (iFallback = yyFallback[iLookAhead])!=0 ){
 #ifndef NDEBUG
         if( yyTraceFILE ){
           fprintf(yyTraceFILE, "%sFALLBACK %s => %s\n",
              yyTracePrompt, yyTokenName[iLookAhead], yyTokenName[iFallback]);
         }
 #endif
         return yy_find_shift_action(pParser, iFallback);
       }
 #endif
 #ifdef YYWILDCARD
       {
         int j = i - iLookAhead + YYWILDCARD;
         if( 
 #if YY_SHIFT_MIN+YYWILDCARD<0
           j>=0 &&
 #endif
 #if YY_SHIFT_MAX+YYWILDCARD>=YY_ACTTAB_COUNT
           j<YY_ACTTAB_COUNT &&
 #endif
           yy_lookahead[j]==YYWILDCARD
         ){
 #ifndef NDEBUG
           if( yyTraceFILE ){
             fprintf(yyTraceFILE, "%sWILDCARD %s => %s\n",
                yyTracePrompt, yyTokenName[iLookAhead], yyTokenName[YYWILDCARD]);
           }
 #endif /* NDEBUG */
           return yy_action[j];
         }
       }
 #endif /* YYWILDCARD */
     }
     return yy_default[stateno];
   }else{
     return yy_action[i];
   }
 }
 
 /*
 ** Find the appropriate action for a parser given the non-terminal
 ** look-ahead token iLookAhead.
 **
 ** If the look-ahead token is YYNOCODE, then check to see if the action is
 ** independent of the look-ahead.  If it is, return the action, otherwise
 ** return YY_NO_ACTION.
 */
 static int yy_find_reduce_action(
   int stateno,              /* Current state number */
   YYCODETYPE iLookAhead     /* The look-ahead token */
 ){
   int i;
 #ifdef YYERRORSYMBOL
   if( stateno>YY_REDUCE_COUNT ){
     return yy_default[stateno];
   }
 #else
   assert( stateno<=YY_REDUCE_COUNT );
 #endif
   i = yy_reduce_ofst[stateno];
   assert( i!=YY_REDUCE_USE_DFLT );
   assert( iLookAhead!=YYNOCODE );
   i += iLookAhead;
 #ifdef YYERRORSYMBOL
   if( i<0 || i>=YY_ACTTAB_COUNT || yy_lookahead[i]!=iLookAhead ){
     return yy_default[stateno];
   }
 #else
   assert( i>=0 && i<YY_ACTTAB_COUNT );
   assert( yy_lookahead[i]==iLookAhead );
 #endif
   return yy_action[i];
 }
 
 /*
 ** The following routine is called if the stack overflows.
 */
 static void yyStackOverflow(yyParser *yypParser, YYMINORTYPE *yypMinor){
    ParseARG_FETCH;
    yypParser->yyidx--;
 #ifndef NDEBUG
    if( yyTraceFILE ){
      fprintf(yyTraceFILE,"%sStack Overflow!\n",yyTracePrompt);
    }
 #endif
    while( yypParser->yyidx>=0 ) yy_pop_parser_stack(yypParser);
    /* Here code is inserted which will execute if the parser
    ** stack every overflows */
 %%
    ParseARG_STORE; /* Suppress warning about unused %extra_argument var */
 }
 
 /*
 ** Perform a shift action.
 */
 static void yy_shift(
   yyParser *yypParser,          /* The parser to be shifted */
   int yyNewState,               /* The new state to shift in */
   int yyMajor,                  /* The major token to shift in */
   YYMINORTYPE *yypMinor         /* Pointer to the minor token to shift in */
 ){
   yyStackEntry *yytos;
   yypParser->yyidx++;
 #ifdef YYTRACKMAXSTACKDEPTH
   if( yypParser->yyidx>yypParser->yyidxMax ){
     yypParser->yyidxMax = yypParser->yyidx;
   }
 #endif
 #if YYSTACKDEPTH>0 
   if( yypParser->yyidx>=YYSTACKDEPTH ){
     yyStackOverflow(yypParser, yypMinor);
     return;
   }
 #else
   if( yypParser->yyidx>=yypParser->yystksz ){
     yyGrowStack(yypParser);
     if( yypParser->yyidx>=yypParser->yystksz ){
       yyStackOverflow(yypParser, yypMinor);
       return;
     }
   }
 #endif
   yytos = &yypParser->yystack[yypParser->yyidx];
   yytos->stateno = (YYACTIONTYPE)yyNewState;
   yytos->major = (YYCODETYPE)yyMajor;
   yytos->minor = *yypMinor;
 #ifndef NDEBUG
   if( yyTraceFILE && yypParser->yyidx>0 ){
     int i;
     fprintf(yyTraceFILE,"%sShift %d\n",yyTracePrompt,yyNewState);
     fprintf(yyTraceFILE,"%sStack:",yyTracePrompt);
     for(i=1; i<=yypParser->yyidx; i++)
       fprintf(yyTraceFILE," %s",yyTokenName[yypParser->yystack[i].major]);
     fprintf(yyTraceFILE,"\n");
   }
 #endif
 }
 
 /* The following table contains information about every rule that
 ** is used during the reduce.
 */
 static const struct {
   YYCODETYPE lhs;         /* Symbol on the left-hand side of the rule */
   unsigned char nrhs;     /* Number of right-hand side symbols in the rule */
 } yyRuleInfo[] = {
 %%
 };
 
 static void yy_accept(yyParser*);  /* Forward Declaration */
 
 /*
 ** Perform a reduce action and the shift that must immediately
 ** follow the reduce.
 */
 static void yy_reduce(
   yyParser *yypParser,         /* The parser */
   int yyruleno                 /* Number of the rule by which to reduce */
 ){
   int yygoto;                     /* The next state */
   int yyact;                      /* The next action */
   YYMINORTYPE yygotominor;        /* The LHS of the rule reduced */
   yyStackEntry *yymsp;            /* The top of the parser's stack */
   int yysize;                     /* Amount to pop the stack */
   ParseARG_FETCH;
   yymsp = &yypParser->yystack[yypParser->yyidx];
 #ifndef NDEBUG
   if( yyTraceFILE && yyruleno>=0 
         && yyruleno<(int)(sizeof(yyRuleName)/sizeof(yyRuleName[0])) ){
     fprintf(yyTraceFILE, "%sReduce [%s].\n", yyTracePrompt,
       yyRuleName[yyruleno]);
   }
 #endif /* NDEBUG */
 
   /* Silence complaints from purify about yygotominor being uninitialized
   ** in some cases when it is copied into the stack after the following
   ** switch.  yygotominor is uninitialized when a rule reduces that does
   ** not set the value of its left-hand side nonterminal.  Leaving the
   ** value of the nonterminal uninitialized is utterly harmless as long
   ** as the value is never used.  So really the only thing this code
   ** accomplishes is to quieten purify.  
   **
   ** 2007-01-16:  The wireshark project (www.wireshark.org) reports that
   ** without this code, their parser segfaults.  I'm not sure what there
   ** parser is doing to make this happen.  This is the second bug report
   ** from wireshark this week.  Clearly they are stressing Lemon in ways
   ** that it has not been previously stressed...  (SQLite ticket #2172)
   */
   /*memset(&yygotominor, 0, sizeof(yygotominor));*/
   yygotominor = yyzerominor;
 
 
   switch( yyruleno ){
   /* Beginning here are the reduction cases.  A typical example
   ** follows:
   **   case 0:
   **  #line <lineno> <grammarfile>
   **     { ... }           // User supplied code
   **  #line <lineno> <thisfile>
   **     break;
   */
 %%
   };
   yygoto = yyRuleInfo[yyruleno].lhs;
   yysize = yyRuleInfo[yyruleno].nrhs;
   yypParser->yyidx -= yysize;
   yyact = yy_find_reduce_action(yymsp[-yysize].stateno,(YYCODETYPE)yygoto);
   if( yyact < YYNSTATE ){
 #ifdef NDEBUG
     /* If we are not debugging and the reduce action popped at least
     ** one element off the stack, then we can push the new element back
     ** onto the stack here, and skip the stack overflow test in yy_shift().
     ** That gives a significant speed improvement. */
     if( yysize ){
       yypParser->yyidx++;
       yymsp -= yysize-1;
       yymsp->stateno = (YYACTIONTYPE)yyact;
       yymsp->major = (YYCODETYPE)yygoto;
       yymsp->minor = yygotominor;
     }else
 #endif
     {
       yy_shift(yypParser,yyact,yygoto,&yygotominor);
     }
   }else{
     assert( yyact == YYNSTATE + YYNRULE + 1 );
     yy_accept(yypParser);
   }
 }
 
 /*
 ** The following code executes when the parse fails
 */
 #ifndef YYNOERRORRECOVERY
 static void yy_parse_failed(
   yyParser *yypParser           /* The parser */
 ){
   ParseARG_FETCH;
 #ifndef NDEBUG
   if( yyTraceFILE ){
     fprintf(yyTraceFILE,"%sFail!\n",yyTracePrompt);
   }
 #endif
   while( yypParser->yyidx>=0 ) yy_pop_parser_stack(yypParser);
   /* Here code is inserted which will be executed whenever the
   ** parser fails */
 %%
   ParseARG_STORE; /* Suppress warning about unused %extra_argument variable */
 }
 #endif /* YYNOERRORRECOVERY */
 
 /*
 ** The following code executes when a syntax error first occurs.
 */
 static void yy_syntax_error(
   yyParser *yypParser,           /* The parser */
   int yymajor,                   /* The major type of the error token */
   YYMINORTYPE yyminor            /* The minor type of the error token */
 ){
   ParseARG_FETCH;
 #define TOKEN (yyminor.yy0)
 %%
   ParseARG_STORE; /* Suppress warning about unused %extra_argument variable */
 }
 
 /*
 ** The following is executed when the parser accepts
 */
 static void yy_accept(
   yyParser *yypParser           /* The parser */
 ){
   ParseARG_FETCH;
 #ifndef NDEBUG
   if( yyTraceFILE ){
     fprintf(yyTraceFILE,"%sAccept!\n",yyTracePrompt);
   }
 #endif
   while( yypParser->yyidx>=0 ) yy_pop_parser_stack(yypParser);
   /* Here code is inserted which will be executed whenever the
   ** parser accepts */
 %%
   ParseARG_STORE; /* Suppress warning about unused %extra_argument variable */
 }
 
 /* The main parser program.
 ** The first argument is a pointer to a structure obtained from
 ** "ParseAlloc" which describes the current state of the parser.
 ** The second argument is the major token number.  The third is
 ** the minor token.  The fourth optional argument is whatever the
 ** user wants (and specified in the grammar) and is available for
 ** use by the action routines.
 **
 ** Inputs:
 ** <ul>
 ** <li> A pointer to the parser (an opaque structure.)
 ** <li> The major token number.
 ** <li> The minor token number.
 ** <li> An option argument of a grammar-specified type.
 ** </ul>
 **
 ** Outputs:
 ** None.
 */
 void Parse(
   void *yyp,                   /* The parser */
   int yymajor,                 /* The major token code number */
   ParseTOKENTYPE yyminor       /* The value for the token */
   ParseARG_PDECL               /* Optional %extra_argument parameter */
 ){
   YYMINORTYPE yyminorunion;
   int yyact;            /* The parser action. */
   int yyendofinput;     /* True if we are at the end of input */
 #ifdef YYERRORSYMBOL
   int yyerrorhit = 0;   /* True if yymajor has invoked an error */
 #endif
   yyParser *yypParser;  /* The parser */
 
   /* (re)initialize the parser, if necessary */
   yypParser = (yyParser*)yyp;
   if( yypParser->yyidx<0 ){
 #if YYSTACKDEPTH<=0
     if( yypParser->yystksz <=0 ){
       /*memset(&yyminorunion, 0, sizeof(yyminorunion));*/
       yyminorunion = yyzerominor;
       yyStackOverflow(yypParser, &yyminorunion);
       return;
     }
 #endif
     yypParser->yyidx = 0;
     yypParser->yyerrcnt = -1;
     yypParser->yystack[0].stateno = 0;
     yypParser->yystack[0].major = 0;
   }
   yyminorunion.yy0 = yyminor;
   yyendofinput = (yymajor==0);
   ParseARG_STORE;
 
 #ifndef NDEBUG
   if( yyTraceFILE ){
     fprintf(yyTraceFILE,"%sInput %s\n",yyTracePrompt,yyTokenName[yymajor]);
   }
 #endif
 
   do{
     yyact = yy_find_shift_action(yypParser,(YYCODETYPE)yymajor);
     if( yyact<YYNSTATE ){
       assert( !yyendofinput );  /* Impossible to shift the $ token */
       yy_shift(yypParser,yyact,yymajor,&yyminorunion);
       yypParser->yyerrcnt--;
       yymajor = YYNOCODE;
     }else if( yyact < YYNSTATE + YYNRULE ){
       yy_reduce(yypParser,yyact-YYNSTATE);
     }else{
       assert( yyact == YY_ERROR_ACTION );
 #ifdef YYERRORSYMBOL
       int yymx;
 #endif
 #ifndef NDEBUG
       if( yyTraceFILE ){
         fprintf(yyTraceFILE,"%sSyntax Error!\n",yyTracePrompt);
       }
 #endif
 #ifdef YYERRORSYMBOL
       /* A syntax error has occurred.
       ** The response to an error depends upon whether or not the
       ** grammar defines an error token "ERROR".  
       **
       ** This is what we do if the grammar does define ERROR:
       **
       **  * Call the %syntax_error function.
       **
       **  * Begin popping the stack until we enter a state where
       **    it is legal to shift the error symbol, then shift
       **    the error symbol.
       **
       **  * Set the error count to three.
       **
       **  * Begin accepting and shifting new tokens.  No new error
       **    processing will occur until three tokens have been
       **    shifted successfully.
       **
       */
       if( yypParser->yyerrcnt<0 ){
         yy_syntax_error(yypParser,yymajor,yyminorunion);
       }
       yymx = yypParser->yystack[yypParser->yyidx].major;
       if( yymx==YYERRORSYMBOL || yyerrorhit ){
 #ifndef NDEBUG
         if( yyTraceFILE ){
           fprintf(yyTraceFILE,"%sDiscard input token %s\n",
              yyTracePrompt,yyTokenName[yymajor]);
         }
 #endif
         yy_destructor(yypParser, (YYCODETYPE)yymajor,&yyminorunion);
         yymajor = YYNOCODE;
       }else{
          while(
           yypParser->yyidx >= 0 &&
           yymx != YYERRORSYMBOL &&
           (yyact = yy_find_reduce_action(
                         yypParser->yystack[yypParser->yyidx].stateno,
                         YYERRORSYMBOL)) >= YYNSTATE
         ){
           yy_pop_parser_stack(yypParser);
         }
         if( yypParser->yyidx < 0 || yymajor==0 ){
           yy_destructor(yypParser,(YYCODETYPE)yymajor,&yyminorunion);
           yy_parse_failed(yypParser);
           yymajor = YYNOCODE;
         }else if( yymx!=YYERRORSYMBOL ){
           YYMINORTYPE u2;
           u2.YYERRSYMDT = 0;
           yy_shift(yypParser,yyact,YYERRORSYMBOL,&u2);
         }
       }
       yypParser->yyerrcnt = 3;
       yyerrorhit = 1;
 #elif defined(YYNOERRORRECOVERY)
       /* If the YYNOERRORRECOVERY macro is defined, then do not attempt to
       ** do any kind of error recovery.  Instead, simply invoke the syntax
       ** error routine and continue going as if nothing had happened.
       **
       ** Applications can set this macro (for example inside %include) if
       ** they intend to abandon the parse upon the first syntax error seen.
       */
       yy_syntax_error(yypParser,yymajor,yyminorunion);
       yy_destructor(yypParser,(YYCODETYPE)yymajor,&yyminorunion);
       yymajor = YYNOCODE;
       
 #else  /* YYERRORSYMBOL is not defined */
       /* This is what we do if the grammar does not define ERROR:
       **
       **  * Report an error message, and throw away the input token.
       **
       **  * If the input token is $, then fail the parse.
       **
       ** As before, subsequent error messages are suppressed until
       ** three input tokens have been successfully shifted.
       */
       if( yypParser->yyerrcnt<=0 ){
         yy_syntax_error(yypParser,yymajor,yyminorunion);
       }
       yypParser->yyerrcnt = 3;
       yy_destructor(yypParser,(YYCODETYPE)yymajor,&yyminorunion);
       if( yyendofinput ){
         yy_parse_failed(yypParser);
       }
       yymajor = YYNOCODE;
 #endif
     }
   }while( yymajor!=YYNOCODE && yypParser->yyidx>=0 );
   return;
 }
 

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