lempar.c

/*
** 2000-05-29
**
** The author disclaims copyright to this source code.  In place of
** a legal notice, here is a blessing:
**
**    May you do good and not evil.
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** Driver template for the LEMON parser generator.
**
** The "lemon" program processes an LALR(1) input grammar file, then uses
** this template to construct a parser.  The "lemon" program inserts text
** at each "%%" line.  Also, any "P-a-r-s-e" identifer prefix (without the
** interstitial "-" characters) contained in this template is changed into
** the value of the %name directive from the grammar.  Otherwise, the content
** of this template is copied straight through into the generate parser
** source file.
**
** The following is the concatenation of all %include directives from the
** input grammar file:
*/
#include <stdio.h>
/************ Begin %include sections from the grammar ************************/
%%
/**************** End of %include directives **********************************/
/* These constants specify the various numeric values for terminal symbols
** in a format understandable to "makeheaders".  This section is blank unless
** "lemon" is run with the "-m" command-line option.
***************** Begin makeheaders token definitions *************************/
%%
/**************** End makeheaders token definitions ***************************/

/* The next sections is a series of control #defines.
** various aspects of the generated parser.
**    YYCODETYPE         is the data type used to store the integer codes
**                       that represent terminal and non-terminal symbols.
**                       "unsigned char" is used if there are fewer than
**                       256 symbols.  Larger types otherwise.
**    YYNOCODE           is a number of type YYCODETYPE that is not used for
**                       any terminal or nonterminal symbol.
**    YYFALLBACK         If defined, this indicates that one or more tokens
**                       (also known as: "terminal symbols") have fall-back
**                       values which should be used if the original symbol
**                       would not parse.  This permits keywords to sometimes
**                       be used as identifiers, for example.
**    YYACTIONTYPE       is the data type used for "action codes" - numbers
**                       that indicate what to do in response to the next
**                       token.
**    ParseTOKENTYPE     is the data type used for minor type for terminal
**                       symbols.  Background: A "minor type" is a semantic
**                       value associated with a terminal or non-terminal
**                       symbols.  For example, for an "ID" terminal symbol,
**                       the minor type might be the name of the identifier.
**                       Each non-terminal can have a different minor type.
**                       Terminal symbols all have the same minor type, though.
**                       This macros defines the minor type for terminal
**                       symbols.
**    YYMINORTYPE        is the data type used for all minor types.
**                       This is typically a union of many types, one of
**                       which is ParseTOKENTYPE.  The entry in the union
**                       for terminal symbols 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
**    YYERRORSYMBOL      is the code number of the error symbol.  If not
**                       defined, then do no error processing.
**    YYNSTATE           the combined number of states.
**    YYNRULE            the number of rules in the grammar
**    YY_MAX_SHIFT       Maximum value for shift actions
**    YY_MIN_SHIFTREDUCE Minimum value for shift-reduce actions
**    YY_MAX_SHIFTREDUCE Maximum value for shift-reduce actions
**    YY_MIN_REDUCE      Maximum value for reduce actions
**    YY_ERROR_ACTION    The yy_action[] code for syntax error
**    YY_ACCEPT_ACTION   The yy_action[] code for accept
**    YY_NO_ACTION       The yy_action[] code for no-op
*/
#ifndef INTERFACE
# define INTERFACE 1
#endif
/************* Begin control #defines *****************************************/
%%
/************* End control #defines *******************************************/

/* 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 <= YY_MAX_SHIFT             Shift N.  That is, push the lookahead
**                                      token onto the stack and goto state N.
**
**   N between YY_MIN_SHIFTREDUCE       Shift to an arbitrary state then
**     and YY_MAX_SHIFTREDUCE           reduce by rule N-YY_MIN_SHIFTREDUCE.
**
**   N between YY_MIN_REDUCE            Reduce by rule N-YY_MIN_REDUCE
**     and YY_MAX_REDUCE
**
**   N == YY_ERROR_ACTION               A syntax error has occurred.
**
**   N == YY_ACCEPT_ACTION              The parser accepts its input.
**
**   N == YY_NO_ACTION                  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 either:
**
**    (A)   N = yy_action[ yy_shift_ofst[S] + X ]
**    (B)   N = yy_default[S]
**
** The (A) formula is preferred.  The B formula is used instead if:
**    (1)  The yy_shift_ofst[S]+X value is out of range, or
**    (2)  yy_lookahead[yy_shift_ofst[S]+X] is not equal to X, or
**    (3)  yy_shift_ofst[S] equal YY_SHIFT_USE_DFLT.
** (Implementation note: YY_SHIFT_USE_DFLT is chosen so that
** YY_SHIFT_USE_DFLT+X will be out of range for all possible lookaheads X.
** Hence only tests (1) and (2) need to be evaluated.)
**
** The formulas above are 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.
**
*********** Begin parsing tables **********************************************/
%%
/********** End of lemon-generated parsing tables *****************************/

/* The next table maps tokens (terminal symbols) 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.
**
** This feature can be used, for example, to cause some keywords in a language
** to revert to identifiers if they keyword does not apply in the context where
** it appears.
*/
#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.
**
** After the "shift" half of a SHIFTREDUCE action, the stateno field
** actually contains the reduce action for the second half of the
** SHIFTREDUCE.
*/
struct yyStackEntry {
    YYACTIONTYPE stateno;  /* The state-number, or reduce action in SHIFTREDUCE */
    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 {
    yyStackEntry *yytos;          /* Pointer to top element of the stack */
#ifdef YYTRACKMAXSTACKDEPTH
    int yyhwm;                    /* High-water mark of the stack */
#endif
#ifndef YYNOERRORRECOVERY
    int yyerrcnt;                 /* Shifts left before out of the error */
#endif
    ParseARG_SDECL                /* A place to hold %extra_argument */
#if YYSTACKDEPTH<=0
    int yystksz;                  /* Current side of the stack */
    yyStackEntry *yystack;        /* The parser's stack */
    yyStackEntry yystk0;          /* First stack entry */
#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){
    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.  Return the number
** of errors.  Return 0 on success.
*/
static int yyGrowStack(yyParser *p){
    int newSize;
    int idx;
    yyStackEntry *pNew;

    newSize = p->yystksz*2 + 100;
    idx = p->yytos ? (int)(p->yytos - p->yystack) : 0;
    if( p->yystack==&p->yystk0 ){
        pNew = malloc(newSize*sizeof(pNew[0]));
        if( pNew ) pNew[0] = p->yystk0;
    }else{
        pNew = realloc(p->yystack, newSize*sizeof(pNew[0]));
    }
    if( pNew ){
        p->yystack = pNew;
        p->yytos = &p->yystack[idx];
#ifndef NDEBUG
        if( yyTraceFILE ){
            fprintf(yyTraceFILE,"%sStack grows from %d to %d entries.\n",
                    yyTracePrompt, p->yystksz, newSize);
        }
#endif
        p->yystksz = newSize;
    }
    return pNew==0;
}
#endif

/* Datatype of the argument to the memory allocated passed as the
** second argument to ParseAlloc() below.  This can be changed by
** putting an appropriate #define in the %include section of the input
** grammar.
*/
#ifndef YYMALLOCARGTYPE
# define YYMALLOCARGTYPE size_t
#endif

/* Initialize a new parser that has already been allocated.
*/
void ParseInit(void *yypParser){
    yyParser *pParser = (yyParser*)yypParser;
#ifdef YYTRACKMAXSTACKDEPTH
    pParser->yyhwm = 0;
#endif
#if YYSTACKDEPTH<=0
    pParser->yytos = NULL;
    pParser->yystack = NULL;
    pParser->yystksz = 0;
    if( yyGrowStack(pParser) ){
        pParser->yystack = &pParser->yystk0;
        pParser->yystksz = 1;
    }
#endif
#ifndef YYNOERRORRECOVERY
    pParser->yyerrcnt = -1;
#endif
    pParser->yytos = pParser->yystack;
    pParser->yystack[0].stateno = 0;
    pParser->yystack[0].major = 0;
}

#ifndef Parse_ENGINEALWAYSONSTACK
/*
** 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)(YYMALLOCARGTYPE)){
    yyParser *pParser;
    pParser = (yyParser*)(*mallocProc)( (YYMALLOCARGTYPE)sizeof(yyParser) );
    if( pParser ) ParseInit(pParser);
    return pParser;
}
#endif /* Parse_ENGINEALWAYSONSTACK */


/* The following function deletes the "minor type" or semantic 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 to be deleted.  The code used to do the
** deletions is derived from the %destructor and/or %token_destructor
** directives of the input grammar.
*/
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.
        */
/********* Begin destructor definitions ***************************************/
        %%
/********* End destructor definitions *****************************************/
        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.
*/
static void yy_pop_parser_stack(yyParser *pParser){
    yyStackEntry *yytos;
    assert( pParser->yytos!=0 );
    assert( pParser->yytos > pParser->yystack );
    yytos = pParser->yytos--;
#ifndef NDEBUG
    if( yyTraceFILE ){
        fprintf(yyTraceFILE,"%sPopping %s\n",
                yyTracePrompt,
                yyTokenName[yytos->major]);
    }
#endif
    yy_destructor(pParser, yytos->major, &yytos->minor);
}

/*
** Clear all secondary memory allocations from the parser
*/
void ParseFinalize(void *p){
    yyParser *pParser = (yyParser*)p;
    while( pParser->yytos>pParser->yystack ) yy_pop_parser_stack(pParser);
#if YYSTACKDEPTH<=0
    if( pParser->yystack!=&pParser->yystk0 ) free(pParser->yystack);
#endif
}

#ifndef Parse_ENGINEALWAYSONSTACK
/*
** Deallocate and destroy a parser.  Destructors are called for
** all stack elements before shutting the parser down.
**
** If the YYPARSEFREENEVERNULL macro exists (for example because it
** is defined in a %include section of the input grammar) then it is
** assumed that the input pointer is never NULL.
*/
void ParseFree(
        void *p,                    /* The parser to be deleted */
        void (*freeProc)(void*)     /* Function used to reclaim memory */
){
#ifndef YYPARSEFREENEVERNULL
    if( p==0 ) return;
#endif
    ParseFinalize(p);
    (*freeProc)(p);
}
#endif /* Parse_ENGINEALWAYSONSTACK */

/*
** Return the peak depth of the stack for a parser.
*/
#ifdef YYTRACKMAXSTACKDEPTH
int ParseStackPeak(void *p){
  yyParser *pParser = (yyParser*)p;
  return pParser->yyhwm;
}
#endif

/*
** Find the appropriate action for a parser given the terminal
** look-ahead token iLookAhead.
*/
static unsigned int yy_find_shift_action(
        yyParser *pParser,        /* The parser */
        YYCODETYPE iLookAhead     /* The look-ahead token */
){
    int i;
    int stateno = pParser->yytos->stateno;

    if( stateno>=YY_MIN_REDUCE ) return stateno;
    assert( stateno <= YY_SHIFT_COUNT );
    do{
        i = yy_shift_ofst[stateno];
        assert( iLookAhead!=YYNOCODE );
        i += iLookAhead;
        if( i<0 || i>=YY_ACTTAB_COUNT || yy_lookahead[i]!=iLookAhead ){
#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
        assert( yyFallback[iFallback]==0 ); /* Fallback loop must terminate */
        iLookAhead = iFallback;
        continue;
      }
#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 && iLookAhead>0
        ){
#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];
        }
    }while(1);
}

/*
** Find the appropriate action for a parser given the non-terminal
** look-ahead token iLookAhead.
*/
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){
    ParseARG_FETCH;
#ifndef NDEBUG
    if( yyTraceFILE ){
        fprintf(yyTraceFILE,"%sStack Overflow!\n",yyTracePrompt);
    }
#endif
    while( yypParser->yytos>yypParser->yystack ) yy_pop_parser_stack(yypParser);
    /* Here code is inserted which will execute if the parser
    ** stack every overflows */
/******** Begin %stack_overflow code ******************************************/
    %%
/******** End %stack_overflow code ********************************************/
    ParseARG_STORE; /* Suppress warning about unused %extra_argument var */
}

/*
** Print tracing information for a SHIFT action
*/
#ifndef NDEBUG
static void yyTraceShift(yyParser *yypParser, int yyNewState){
    if( yyTraceFILE ){
        if( yyNewState<YYNSTATE ){
            fprintf(yyTraceFILE,"%sShift '%s', go to state %d\n",
                    yyTracePrompt,yyTokenName[yypParser->yytos->major],
                    yyNewState);
        }else{
            fprintf(yyTraceFILE,"%sShift '%s'\n",
                    yyTracePrompt,yyTokenName[yypParser->yytos->major]);
        }
    }
}
#else
# define yyTraceShift(X,Y)
#endif

/*
** 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 */
        ParseTOKENTYPE yyMinor        /* The minor token to shift in */
){
    yyStackEntry *yytos;
    yypParser->yytos++;
#ifdef YYTRACKMAXSTACKDEPTH
    if( (int)(yypParser->yytos - yypParser->yystack)>yypParser->yyhwm ){
    yypParser->yyhwm++;
    assert( yypParser->yyhwm == (int)(yypParser->yytos - yypParser->yystack) );
  }
#endif
#if YYSTACKDEPTH>0
    if( yypParser->yytos>=&yypParser->yystack[YYSTACKDEPTH] ){
    yypParser->yytos--;
    yyStackOverflow(yypParser);
    return;
  }
#else
    if( yypParser->yytos>=&yypParser->yystack[yypParser->yystksz] ){
        if( yyGrowStack(yypParser) ){
            yypParser->yytos--;
            yyStackOverflow(yypParser);
            return;
        }
    }
#endif
    if( yyNewState > YY_MAX_SHIFT ){
        yyNewState += YY_MIN_REDUCE - YY_MIN_SHIFTREDUCE;
    }
    yytos = yypParser->yytos;
    yytos->stateno = (YYACTIONTYPE)yyNewState;
    yytos->major = (YYCODETYPE)yyMajor;
    yytos->minor.yy0 = yyMinor;
    yyTraceShift(yypParser, yyNewState);
}

/* 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 */
        unsigned int yyruleno        /* Number of the rule by which to reduce */
){
    int yygoto;                     /* The next state */
    int yyact;                      /* The next action */
    yyStackEntry *yymsp;            /* The top of the parser's stack */
    int yysize;                     /* Amount to pop the stack */
    ParseARG_FETCH;
    yymsp = yypParser->yytos;
#ifndef NDEBUG
    if( yyTraceFILE && yyruleno<(int)(sizeof(yyRuleName)/sizeof(yyRuleName[0])) ){
        yysize = yyRuleInfo[yyruleno].nrhs;
        fprintf(yyTraceFILE, "%sReduce [%s], go to state %d.\n", yyTracePrompt,
                yyRuleName[yyruleno], yymsp[-yysize].stateno);
    }
#endif /* NDEBUG */

    /* Check that the stack is large enough to grow by a single entry
    ** if the RHS of the rule is empty.  This ensures that there is room
    ** enough on the stack to push the LHS value */
    if( yyRuleInfo[yyruleno].nrhs==0 ){
#ifdef YYTRACKMAXSTACKDEPTH
        if( (int)(yypParser->yytos - yypParser->yystack)>yypParser->yyhwm ){
      yypParser->yyhwm++;
      assert( yypParser->yyhwm == (int)(yypParser->yytos - yypParser->yystack));
    }
#endif
#if YYSTACKDEPTH>0
        if( yypParser->yytos>=&yypParser->yystack[YYSTACKDEPTH-1] ){
      yyStackOverflow(yypParser);
      return;
    }
#else
        if( yypParser->yytos>=&yypParser->yystack[yypParser->yystksz-1] ){
            if( yyGrowStack(yypParser) ){
                yyStackOverflow(yypParser);
                return;
            }
            yymsp = yypParser->yytos;
        }
#endif
    }

    switch( yyruleno ){
        /* Beginning here are the reduction cases.  A typical example
        ** follows:
        **   case 0:
        **  #line <lineno> <grammarfile>
        **     { ... }           // User supplied code
        **  #line <lineno> <thisfile>
        **     break;
        */
/********** Begin reduce actions **********************************************/
        %%
/********** End reduce actions ************************************************/
    };
    assert( yyruleno<sizeof(yyRuleInfo)/sizeof(yyRuleInfo[0]) );
    yygoto = yyRuleInfo[yyruleno].lhs;
    yysize = yyRuleInfo[yyruleno].nrhs;
    yyact = yy_find_reduce_action(yymsp[-yysize].stateno,(YYCODETYPE)yygoto);
    if( yyact <= YY_MAX_SHIFTREDUCE ){
        if( yyact>YY_MAX_SHIFT ){
            yyact += YY_MIN_REDUCE - YY_MIN_SHIFTREDUCE;
        }
        yymsp -= yysize-1;
        yypParser->yytos = yymsp;
        yymsp->stateno = (YYACTIONTYPE)yyact;
        yymsp->major = (YYCODETYPE)yygoto;
        yyTraceShift(yypParser, yyact);
    }else{
        assert( yyact == YY_ACCEPT_ACTION );
        yypParser->yytos -= yysize;
        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->yytos>yypParser->yystack ) yy_pop_parser_stack(yypParser);
    /* Here code is inserted which will be executed whenever the
    ** parser fails */
/************ Begin %parse_failure code ***************************************/
    %%
/************ End %parse_failure code *****************************************/
    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 */
        ParseTOKENTYPE yyminor         /* The minor type of the error token */
){
    ParseARG_FETCH;
#define TOKEN yyminor
/************ Begin %syntax_error code ****************************************/
    %%
/************ End %syntax_error code ******************************************/
    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
#ifndef YYNOERRORRECOVERY
    yypParser->yyerrcnt = -1;
#endif
    assert( yypParser->yytos==yypParser->yystack );
    /* Here code is inserted which will be executed whenever the
    ** parser accepts */
/*********** Begin %parse_accept code *****************************************/
    %%
/*********** End %parse_accept code *******************************************/
    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;
    unsigned int yyact;   /* The parser action. */
#if !defined(YYERRORSYMBOL) && !defined(YYNOERRORRECOVERY)
    int yyendofinput;     /* True if we are at the end of input */
#endif
#ifdef YYERRORSYMBOL
    int yyerrorhit = 0;   /* True if yymajor has invoked an error */
#endif
    yyParser *yypParser;  /* The parser */

    yypParser = (yyParser*)yyp;
    assert( yypParser->yytos!=0 );
#if !defined(YYERRORSYMBOL) && !defined(YYNOERRORRECOVERY)
    yyendofinput = (yymajor==0);
#endif
    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 <= YY_MAX_SHIFTREDUCE ){
            yy_shift(yypParser,yyact,yymajor,yyminor);
#ifndef YYNOERRORRECOVERY
            yypParser->yyerrcnt--;
#endif
            yymajor = YYNOCODE;
        }else if( yyact <= YY_MAX_REDUCE ){
            yy_reduce(yypParser,yyact-YY_MIN_REDUCE);
        }else{
            assert( yyact == YY_ERROR_ACTION );
            yyminorunion.yy0 = yyminor;
#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,yyminor);
      }
      yymx = yypParser->yytos->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->yytos >= yypParser->yystack
            && yymx != YYERRORSYMBOL
            && (yyact = yy_find_reduce_action(
                        yypParser->yytos->stateno,
                        YYERRORSYMBOL)) >= YY_MIN_REDUCE
        ){
          yy_pop_parser_stack(yypParser);
        }
        if( yypParser->yytos < yypParser->yystack || yymajor==0 ){
          yy_destructor(yypParser,(YYCODETYPE)yymajor,&yyminorunion);
          yy_parse_failed(yypParser);
#ifndef YYNOERRORRECOVERY
          yypParser->yyerrcnt = -1;
#endif
          yymajor = YYNOCODE;
        }else if( yymx!=YYERRORSYMBOL ){
          yy_shift(yypParser,yyact,YYERRORSYMBOL,yyminor);
        }
      }
      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, yyminor);
      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, yyminor);
            }
            yypParser->yyerrcnt = 3;
            yy_destructor(yypParser,(YYCODETYPE)yymajor,&yyminorunion);
            if( yyendofinput ){
                yy_parse_failed(yypParser);
#ifndef YYNOERRORRECOVERY
                yypParser->yyerrcnt = -1;
#endif
            }
            yymajor = YYNOCODE;
#endif
        }
    }while( yymajor!=YYNOCODE && yypParser->yytos>yypParser->yystack );
#ifndef NDEBUG
    if( yyTraceFILE ){
        yyStackEntry *i;
        char cDiv = '[';
        fprintf(yyTraceFILE,"%sReturn. Stack=",yyTracePrompt);
        for(i=&yypParser->yystack[1]; i<=yypParser->yytos; i++){
            fprintf(yyTraceFILE,"%c%s", cDiv, yyTokenName[i->major]);
            cDiv = ' ';
        }
        fprintf(yyTraceFILE,"]\n");
    }
#endif
    return;
}