lempar.c

/* Driver template for the LEMON parser generator.
 * The author disclaims copyright to this source code.
 */
#include <assert.h>
#include <stdlib.h>

/* Make sure the INTERFACE macro is defined. */
#ifndef INTERFACE
#define INTERFACE 1
#endif

/* 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.
 */
// clang-format off
%%
// clang-format on
/* 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.
 */

// clang-format off
%%
// clang-format on
#ifndef NDEBUG
#include <stdio.h>
void ParseTrace(FILE *, char *);
#endif
void *ParseAlloc();
void ParseFree(void *);
void Parse(void *, int , ParseTOKENTYPE yyminor ParseARG_PDECL);

/* First off, code is included that follows the "include" declaration
 * in the input grammar file.
 */
// clang-format off
%%
// clang-format on
#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.
 */
// clang-format off
%%
// clang-format on

/* 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[] = {
// clang-format off
%%
// clang-format on
};
#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
static FILE *yyTraceFILE = 0;
static char *yyTracePrompt = 0;

/* 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;
}

/* For tracing shifts, the names of all terminals and nonterminals
 * are required.  The following table supplies these names
 */
static const char *const yyTokenName[] = {
// clang-format off
%%
// clang-format on
};

/* For tracing reduce actions, the names of all rules are required. */
static const char *const yyRuleName[] = {
// clang-format off
%%
// clang-format on
};
#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() {
  yyParser *pParser;
  pParser = (yyParser *)malloc((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.
     */
// clang-format off
%%
// clang-format on
    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) {
  yyParser *pParser = (yyParser *)p;
  if (pParser == 0)
    return;
  while (pParser->yyidx >= 0)
    yy_pop_parser_stack(pParser);
#if YYSTACKDEPTH <= 0
  free(pParser->yystack);
#endif
  free((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 */
// clang-format off
%%
// clang-format on
  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[] = {
// clang-format off
%%
// clang-format on
};

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)
   */
  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;
     */
// clang-format off
%%
// clang-format on
  };
  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
   */
// clang-format off
%%
// clang-format on
  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)
// clang-format off
%%
// clang-format on
  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
   */
// clang-format off
%%
// clang-format on
  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) {
      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;
}