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Artifact [ea5c8589]
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Artifact ea5c8589c7749e9bd32ba10432aeeed3c16e215de72a12ada2bc707884837149:


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/*
** This file contains all sources (including headers) to the LEMON
** LALR(1) parser generator.  The sources have been combined into a
** single file to make it easy to include LEMON in the source tree
** and Makefile of another program.
**
** The author of this program disclaims copyright.
*/
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#include <ctype.h>
#include <stdlib.h>
#include <assert.h>

#define ISSPACE(X) isspace((unsigned char)(X))
#define ISDIGIT(X) isdigit((unsigned char)(X))
#define ISALNUM(X) isalnum((unsigned char)(X))
#define ISALPHA(X) isalpha((unsigned char)(X))
#define ISUPPER(X) isupper((unsigned char)(X))
#define ISLOWER(X) islower((unsigned char)(X))


#ifndef __WIN32__
#   if defined(_WIN32) || defined(WIN32)
#       define __WIN32__
#   endif
#endif

#ifdef __WIN32__
#ifdef __cplusplus
extern "C" {
#endif
extern int access(const char *path, int mode);
#ifdef __cplusplus
}
#endif
#else
#include <unistd.h>
#endif

/* #define PRIVATE static */
#define PRIVATE

#ifdef TEST
#define MAXRHS 5       /* Set low to exercise exception code */
#else
#define MAXRHS 1000
#endif

extern void memory_error();
static int showPrecedenceConflict = 0;
static char *msort(char*,char**,int(*)(const char*,const char*));

/*
** Compilers are getting increasingly pedantic about type conversions
** as C evolves ever closer to Ada....  To work around the latest problems
** we have to define the following variant of strlen().
*/
#define lemonStrlen(X)   ((int)strlen(X))

/*
** Compilers are starting to complain about the use of sprintf() and strcpy(),
** saying they are unsafe.  So we define our own versions of those routines too.
**
** There are three routines here:  lemon_sprintf(), lemon_vsprintf(), and
** lemon_addtext(). The first two are replacements for sprintf() and vsprintf().
** The third is a helper routine for vsnprintf() that adds texts to the end of a
** buffer, making sure the buffer is always zero-terminated.
**
** The string formatter is a minimal subset of stdlib sprintf() supporting only
** a few simply conversions:
**
**   %d
**   %s
**   %.*s
**
*/
static void lemon_addtext(
  char *zBuf,           /* The buffer to which text is added */
  int *pnUsed,          /* Slots of the buffer used so far */
  const char *zIn,      /* Text to add */
  int nIn,              /* Bytes of text to add.  -1 to use strlen() */
  int iWidth            /* Field width.  Negative to left justify */
){
  if( nIn<0 ) for(nIn=0; zIn[nIn]; nIn++){}
  while( iWidth>nIn ){ zBuf[(*pnUsed)++] = ' '; iWidth--; }
  if( nIn==0 ) return;
  memcpy(&zBuf[*pnUsed], zIn, nIn);
  *pnUsed += nIn;
  while( (-iWidth)>nIn ){ zBuf[(*pnUsed)++] = ' '; iWidth++; }
  zBuf[*pnUsed] = 0;
}
static int lemon_vsprintf(char *str, const char *zFormat, va_list ap){
  int i, j, k, c;
  int nUsed = 0;
  const char *z;
  char zTemp[50];
  str[0] = 0;
  for(i=j=0; (c = zFormat[i])!=0; i++){
    if( c=='%' ){
      int iWidth = 0;
      lemon_addtext(str, &nUsed, &zFormat[j], i-j, 0);
      c = zFormat[++i];
      if( ISDIGIT(c) || (c=='-' && ISDIGIT(zFormat[i+1])) ){
        if( c=='-' ) i++;
        while( ISDIGIT(zFormat[i]) ) iWidth = iWidth*10 + zFormat[i++] - '0';
        if( c=='-' ) iWidth = -iWidth;
        c = zFormat[i];
      }
      if( c=='d' ){
        int v = va_arg(ap, int);
        if( v<0 ){
          lemon_addtext(str, &nUsed, "-", 1, iWidth);
          v = -v;
        }else if( v==0 ){
          lemon_addtext(str, &nUsed, "0", 1, iWidth);
        }
        k = 0;
        while( v>0 ){
          k++;
          zTemp[sizeof(zTemp)-k] = (v%10) + '0';
          v /= 10;
        }
        lemon_addtext(str, &nUsed, &zTemp[sizeof(zTemp)-k], k, iWidth);
      }else if( c=='s' ){
        z = va_arg(ap, const char*);
        lemon_addtext(str, &nUsed, z, -1, iWidth);
      }else if( c=='.' && memcmp(&zFormat[i], ".*s", 3)==0 ){
        i += 2;
        k = va_arg(ap, int);
        z = va_arg(ap, const char*);
        lemon_addtext(str, &nUsed, z, k, iWidth);
      }else if( c=='%' ){
        lemon_addtext(str, &nUsed, "%", 1, 0);
      }else{
        fprintf(stderr, "illegal format\n");
        exit(1);
      }
      j = i+1;
    }
  }
  lemon_addtext(str, &nUsed, &zFormat[j], i-j, 0);
  return nUsed;
}
static int lemon_sprintf(char *str, const char *format, ...){
  va_list ap;
  int rc;
  va_start(ap, format);
  rc = lemon_vsprintf(str, format, ap);
  va_end(ap);
  return rc;
}
static void lemon_strcpy(char *dest, const char *src){
  while( (*(dest++) = *(src++))!=0 ){}
}
static void lemon_strcat(char *dest, const char *src){
  while( *dest ) dest++;
  lemon_strcpy(dest, src);
}


/* a few forward declarations... */
struct rule;
struct lemon;
struct action;

static struct action *Action_new(void);
static struct action *Action_sort(struct action *);

/********** From the file "build.h" ************************************/
void FindRulePrecedences(struct lemon*);
void FindFirstSets(struct lemon*);
void FindStates(struct lemon*);
void FindLinks(struct lemon*);
void FindFollowSets(struct lemon*);
void FindActions(struct lemon*);

/********* From the file "configlist.h" *********************************/
void Configlist_init(void);
struct config *Configlist_add(struct rule *, int);
struct config *Configlist_addbasis(struct rule *, int);
void Configlist_closure(struct lemon *);
void Configlist_sort(void);
void Configlist_sortbasis(void);
struct config *Configlist_return(void);
struct config *Configlist_basis(void);
void Configlist_eat(struct config *);
void Configlist_reset(void);

/********* From the file "error.h" ***************************************/
void ErrorMsg(const char *, int,const char *, ...);

/****** From the file "option.h" ******************************************/
enum option_type { OPT_FLAG=1,  OPT_INT,  OPT_DBL,  OPT_STR,
         OPT_FFLAG, OPT_FINT, OPT_FDBL, OPT_FSTR};
struct s_options {
  enum option_type type;
  const char *label;
  char *arg;
  const char *message;
};
int    OptInit(char**,struct s_options*,FILE*);
int    OptNArgs(void);
char  *OptArg(int);
void   OptErr(int);
void   OptPrint(void);

/******** From the file "parse.h" *****************************************/
void Parse(struct lemon *lemp);

/********* From the file "plink.h" ***************************************/
struct plink *Plink_new(void);
void Plink_add(struct plink **, struct config *);
void Plink_copy(struct plink **, struct plink *);
void Plink_delete(struct plink *);

/********** From the file "report.h" *************************************/
void Reprint(struct lemon *);
void ReportOutput(struct lemon *);
void ReportTable(struct lemon *, int, int);
void ReportHeader(struct lemon *);
void CompressTables(struct lemon *);
void ResortStates(struct lemon *);

/********** From the file "set.h" ****************************************/
void  SetSize(int);             /* All sets will be of size N */
char *SetNew(void);               /* A new set for element 0..N */
void  SetFree(char*);             /* Deallocate a set */
int SetAdd(char*,int);            /* Add element to a set */
int SetUnion(char *,char *);    /* A <- A U B, thru element N */
#define SetFind(X,Y) (X[Y])       /* True if Y is in set X */

/********** From the file "struct.h" *************************************/
/*
** Principal data structures for the LEMON parser generator.
*/

typedef enum {LEMON_FALSE=0, LEMON_TRUE} Boolean;

/* Symbols (terminals and nonterminals) of the grammar are stored
** in the following: */
enum symbol_type {
  TERMINAL,
  NONTERMINAL,
  MULTITERMINAL
};
enum e_assoc {
    LEFT,
    RIGHT,
    NONE,
    UNK
};
struct symbol {
  const char *name;        /* Name of the symbol */
  int index;               /* Index number for this symbol */
  enum symbol_type type;   /* Symbols are all either TERMINALS or NTs */
  struct rule *rule;       /* Linked list of rules of this (if an NT) */
  struct symbol *fallback; /* fallback token in case this token doesn't parse */
  int prec;                /* Precedence if defined (-1 otherwise) */
  enum e_assoc assoc;      /* Associativity if precedence is defined */
  char *firstset;          /* First-set for all rules of this symbol */
  Boolean lambda;          /* True if NT and can generate an empty string */
  int useCnt;              /* Number of times used */
  char *destructor;        /* Code which executes whenever this symbol is
                           ** popped from the stack during error processing */
  int destLineno;          /* Line number for start of destructor.  Set to
                           ** -1 for duplicate destructors. */
  char *datatype;          /* The data type of information held by this
                           ** object. Only used if type==NONTERMINAL */
  int dtnum;               /* The data type number.  In the parser, the value
                           ** stack is a union.  The .yy%d element of this
                           ** union is the correct data type for this object */
  int bContent;            /* True if this symbol ever carries content - if
                           ** it is ever more than just syntax */
  /* The following fields are used by MULTITERMINALs only */
  int nsubsym;             /* Number of constituent symbols in the MULTI */
  struct symbol **subsym;  /* Array of constituent symbols */
};

/* Each production rule in the grammar is stored in the following
** structure.  */
struct rule {
  struct symbol *lhs;      /* Left-hand side of the rule */
  const char *lhsalias;    /* Alias for the LHS (NULL if none) */
  int lhsStart;            /* True if left-hand side is the start symbol */
  int ruleline;            /* Line number for the rule */
  int nrhs;                /* Number of RHS symbols */
  struct symbol **rhs;     /* The RHS symbols */
  const char **rhsalias;   /* An alias for each RHS symbol (NULL if none) */
  int line;                /* Line number at which code begins */
  const char *code;        /* The code executed when this rule is reduced */
  const char *codePrefix;  /* Setup code before code[] above */
  const char *codeSuffix;  /* Breakdown code after code[] above */
  struct symbol *precsym;  /* Precedence symbol for this rule */
  int index;               /* An index number for this rule */
  int iRule;               /* Rule number as used in the generated tables */
  Boolean noCode;          /* True if this rule has no associated C code */
  Boolean codeEmitted;     /* True if the code has been emitted already */
  Boolean canReduce;       /* True if this rule is ever reduced */
  Boolean doesReduce;      /* Reduce actions occur after optimization */
  Boolean neverReduce;     /* Reduce is theoretically possible, but prevented
                           ** by actions or other outside implementation */
  struct rule *nextlhs;    /* Next rule with the same LHS */
  struct rule *next;       /* Next rule in the global list */
};

/* A configuration is a production rule of the grammar together with
** a mark (dot) showing how much of that rule has been processed so far.
** Configurations also contain a follow-set which is a list of terminal
** symbols which are allowed to immediately follow the end of the rule.
** Every configuration is recorded as an instance of the following: */
enum cfgstatus {
  COMPLETE,
  INCOMPLETE
};
struct config {
  struct rule *rp;         /* The rule upon which the configuration is based */
  int dot;                 /* The parse point */
  char *fws;               /* Follow-set for this configuration only */
  struct plink *fplp;      /* Follow-set forward propagation links */
  struct plink *bplp;      /* Follow-set backwards propagation links */
  struct state *stp;       /* Pointer to state which contains this */
  enum cfgstatus status;   /* used during followset and shift computations */
  struct config *next;     /* Next configuration in the state */
  struct config *bp;       /* The next basis configuration */
};

enum e_action {
  SHIFT,
  ACCEPT,
  REDUCE,
  ERROR,
  SSCONFLICT,              /* A shift/shift conflict */
  SRCONFLICT,              /* Was a reduce, but part of a conflict */
  RRCONFLICT,              /* Was a reduce, but part of a conflict */
  SH_RESOLVED,             /* Was a shift.  Precedence resolved conflict */
  RD_RESOLVED,             /* Was reduce.  Precedence resolved conflict */
  NOT_USED,                /* Deleted by compression */
  SHIFTREDUCE              /* Shift first, then reduce */
};

/* Every shift or reduce operation is stored as one of the following */
struct action {
  struct symbol *sp;       /* The look-ahead symbol */
  enum e_action type;
  union {
    struct state *stp;     /* The new state, if a shift */
    struct rule *rp;       /* The rule, if a reduce */
  } x;
  struct symbol *spOpt;    /* SHIFTREDUCE optimization to this symbol */
  struct action *next;     /* Next action for this state */
  struct action *collide;  /* Next action with the same hash */
};

/* Each state of the generated parser's finite state machine
** is encoded as an instance of the following structure. */
struct state {
  struct config *bp;       /* The basis configurations for this state */
  struct config *cfp;      /* All configurations in this set */
  int statenum;            /* Sequential number for this state */
  struct action *ap;       /* List of actions for this state */
  int nTknAct, nNtAct;     /* Number of actions on terminals and nonterminals */
  int iTknOfst, iNtOfst;   /* yy_action[] offset for terminals and nonterms */
  int iDfltReduce;         /* Default action is to REDUCE by this rule */
  struct rule *pDfltReduce;/* The default REDUCE rule. */
  int autoReduce;          /* True if this is an auto-reduce state */
};
#define NO_OFFSET (-2147483647)

/* A followset propagation link indicates that the contents of one
** configuration followset should be propagated to another whenever
** the first changes. */
struct plink {
  struct config *cfp;      /* The configuration to which linked */
  struct plink *next;      /* The next propagate link */
};

/* The state vector for the entire parser generator is recorded as
** follows.  (LEMON uses no global variables and makes little use of
** static variables.  Fields in the following structure can be thought
** of as begin global variables in the program.) */
struct lemon {
  struct state **sorted;   /* Table of states sorted by state number */
  struct rule *rule;       /* List of all rules */
  struct rule *startRule;  /* First rule */
  int nstate;              /* Number of states */
  int nxstate;             /* nstate with tail degenerate states removed */
  int nrule;               /* Number of rules */
  int nruleWithAction;     /* Number of rules with actions */
  int nsymbol;             /* Number of terminal and nonterminal symbols */
  int nterminal;           /* Number of terminal symbols */
  int minShiftReduce;      /* Minimum shift-reduce action value */
  int errAction;           /* Error action value */
  int accAction;           /* Accept action value */
  int noAction;            /* No-op action value */
  int minReduce;           /* Minimum reduce action */
  int maxAction;           /* Maximum action value of any kind */
  struct symbol **symbols; /* Sorted array of pointers to symbols */
  int errorcnt;            /* Number of errors */
  struct symbol *errsym;   /* The error symbol */
  struct symbol *wildcard; /* Token that matches anything */
  char *name;              /* Name of the generated parser */
  char *arg;               /* Declaration of the 3rd argument to parser */
  char *ctx;               /* Declaration of 2nd argument to constructor */
  char *tokentype;         /* Type of terminal symbols in the parser stack */
  char *vartype;           /* The default type of non-terminal symbols */
  char *start;             /* Name of the start symbol for the grammar */
  char *stacksize;         /* Size of the parser stack */
  char *include;           /* Code to put at the start of the C file */
  char *error;             /* Code to execute when an error is seen */
  char *overflow;          /* Code to execute on a stack overflow */
  char *failure;           /* Code to execute on parser failure */
  char *accept;            /* Code to execute when the parser excepts */
  char *extracode;         /* Code appended to the generated file */
  char *tokendest;         /* Code to execute to destroy token data */
  char *vardest;           /* Code for the default non-terminal destructor */
  char *filename;          /* Name of the input file */
  char *outname;           /* Name of the current output file */
  char *tokenprefix;       /* A prefix added to token names in the .h file */
  int nconflict;           /* Number of parsing conflicts */
  int nactiontab;          /* Number of entries in the yy_action[] table */
  int nlookaheadtab;       /* Number of entries in yy_lookahead[] */
  int tablesize;           /* Total table size of all tables in bytes */
  int basisflag;           /* Print only basis configurations */
  int printPreprocessed;   /* Show preprocessor output on stdout */
  int has_fallback;        /* True if any %fallback is seen in the grammar */
  int nolinenosflag;       /* True if #line statements should not be printed */
  char *argv0;             /* Name of the program */
};

#define MemoryCheck(X) if((X)==0){ \
  extern void memory_error(); \
  memory_error(); \
}

/**************** From the file "table.h" *********************************/
/*
** All code in this file has been automatically generated
** from a specification in the file
**              "table.q"
** by the associative array code building program "aagen".
** Do not edit this file!  Instead, edit the specification
** file, then rerun aagen.
*/
/*
** Code for processing tables in the LEMON parser generator.
*/
/* Routines for handling a strings */

const char *Strsafe(const char *);

void Strsafe_init(void);
int Strsafe_insert(const char *);
const char *Strsafe_find(const char *);

/* Routines for handling symbols of the grammar */

struct symbol *Symbol_new(const char *);
int Symbolcmpp(const void *, const void *);
void Symbol_init(void);
int Symbol_insert(struct symbol *, const char *);
struct symbol *Symbol_find(const char *);
struct symbol *Symbol_Nth(int);
int Symbol_count(void);
struct symbol **Symbol_arrayof(void);

/* Routines to manage the state table */

int Configcmp(const char *, const char *);
struct state *State_new(void);
void State_init(void);
int State_insert(struct state *, struct config *);
struct state *State_find(struct config *);
struct state **State_arrayof(void);

/* Routines used for efficiency in Configlist_add */

void Configtable_init(void);
int Configtable_insert(struct config *);
struct config *Configtable_find(struct config *);
void Configtable_clear(int(*)(struct config *));

/****************** From the file "action.c" *******************************/
/*
** Routines processing parser actions in the LEMON parser generator.
*/

/* Allocate a new parser action */
static struct action *Action_new(void){
  static struct action *actionfreelist = 0;
  struct action *newaction;

  if( actionfreelist==0 ){
    int i;
    int amt = 100;
    actionfreelist = (struct action *)calloc(amt, sizeof(struct action));
    if( actionfreelist==0 ){
      fprintf(stderr,"Unable to allocate memory for a new parser action.");
      exit(1);
    }
    for(i=0; i<amt-1; i++) actionfreelist[i].next = &actionfreelist[i+1];
    actionfreelist[amt-1].next = 0;
  }
  newaction = actionfreelist;
  actionfreelist = actionfreelist->next;
  return newaction;
}

/* Compare two actions for sorting purposes.  Return negative, zero, or
** positive if the first action is less than, equal to, or greater than
** the first
*/
static int actioncmp(
  struct action *ap1,
  struct action *ap2
){
  int rc;
  rc = ap1->sp->index - ap2->sp->index;
  if( rc==0 ){
    rc = (int)ap1->type - (int)ap2->type;
  }
  if( rc==0 && (ap1->type==REDUCE || ap1->type==SHIFTREDUCE) ){
    rc = ap1->x.rp->index - ap2->x.rp->index;
  }
  if( rc==0 ){
    rc = (int) (ap2 - ap1);
  }
  return rc;
}

/* Sort parser actions */
static struct action *Action_sort(
  struct action *ap
){
  ap = (struct action *)msort((char *)ap,(char **)&ap->next,
                              (int(*)(const char*,const char*))actioncmp);
  return ap;
}

void Action_add(
  struct action **app,
  enum e_action type,
  struct symbol *sp,
  char *arg
){
  struct action *newaction;
  newaction = Action_new();
  newaction->next = *app;
  *app = newaction;
  newaction->type = type;
  newaction->sp = sp;
  newaction->spOpt = 0;
  if( type==SHIFT ){
    newaction->x.stp = (struct state *)arg;
  }else{
    newaction->x.rp = (struct rule *)arg;
  }
}
/********************** New code to implement the "acttab" module ***********/
/*
** This module implements routines use to construct the yy_action[] table.
*/

/*
** The state of the yy_action table under construction is an instance of
** the following structure.
**
** The yy_action table maps the pair (state_number, lookahead) into an
** action_number.  The table is an array of integers pairs.  The state_number
** determines an initial offset into the yy_action array.  The lookahead
** value is then added to this initial offset to get an index X into the
** yy_action array. If the aAction[X].lookahead equals the value of the
** of the lookahead input, then the value of the action_number output is
** aAction[X].action.  If the lookaheads do not match then the
** default action for the state_number is returned.
**
** All actions associated with a single state_number are first entered
** into aLookahead[] using multiple calls to acttab_action().  Then the
** actions for that single state_number are placed into the aAction[]
** array with a single call to acttab_insert().  The acttab_insert() call
** also resets the aLookahead[] array in preparation for the next
** state number.
*/
struct lookahead_action {
  int lookahead;             /* Value of the lookahead token */
  int action;                /* Action to take on the given lookahead */
};
typedef struct acttab acttab;
struct acttab {
  int nAction;                 /* Number of used slots in aAction[] */
  int nActionAlloc;            /* Slots allocated for aAction[] */
  struct lookahead_action
    *aAction,                  /* The yy_action[] table under construction */
    *aLookahead;               /* A single new transaction set */
  int mnLookahead;             /* Minimum aLookahead[].lookahead */
  int mnAction;                /* Action associated with mnLookahead */
  int mxLookahead;             /* Maximum aLookahead[].lookahead */
  int nLookahead;              /* Used slots in aLookahead[] */
  int nLookaheadAlloc;         /* Slots allocated in aLookahead[] */
  int nterminal;               /* Number of terminal symbols */
  int nsymbol;                 /* total number of symbols */
};

/* Return the number of entries in the yy_action table */
#define acttab_lookahead_size(X) ((X)->nAction)

/* The value for the N-th entry in yy_action */
#define acttab_yyaction(X,N)  ((X)->aAction[N].action)

/* The value for the N-th entry in yy_lookahead */
#define acttab_yylookahead(X,N)  ((X)->aAction[N].lookahead)

/* Free all memory associated with the given acttab */
void acttab_free(acttab *p){
  free( p->aAction );
  free( p->aLookahead );
  free( p );
}

/* Allocate a new acttab structure */
acttab *acttab_alloc(int nsymbol, int nterminal){
  acttab *p = (acttab *) calloc( 1, sizeof(*p) );
  if( p==0 ){
    fprintf(stderr,"Unable to allocate memory for a new acttab.");
    exit(1);
  }
  memset(p, 0, sizeof(*p));
  p->nsymbol = nsymbol;
  p->nterminal = nterminal;
  return p;
}

/* Add a new action to the current transaction set.
**
** This routine is called once for each lookahead for a particular
** state.
*/
void acttab_action(acttab *p, int lookahead, int action){
  if( p->nLookahead>=p->nLookaheadAlloc ){
    p->nLookaheadAlloc += 25;
    p->aLookahead = (struct lookahead_action *) realloc( p->aLookahead,
                             sizeof(p->aLookahead[0])*p->nLookaheadAlloc );
    if( p->aLookahead==0 ){
      fprintf(stderr,"malloc failed\n");
      exit(1);
    }
  }
  if( p->nLookahead==0 ){
    p->mxLookahead = lookahead;
    p->mnLookahead = lookahead;
    p->mnAction = action;
  }else{
    if( p->mxLookahead<lookahead ) p->mxLookahead = lookahead;
    if( p->mnLookahead>lookahead ){
      p->mnLookahead = lookahead;
      p->mnAction = action;
    }
  }
  p->aLookahead[p->nLookahead].lookahead = lookahead;
  p->aLookahead[p->nLookahead].action = action;
  p->nLookahead++;
}

/*
** Add the transaction set built up with prior calls to acttab_action()
** into the current action table.  Then reset the transaction set back
** to an empty set in preparation for a new round of acttab_action() calls.
**
** Return the offset into the action table of the new transaction.
**
** If the makeItSafe parameter is true, then the offset is chosen so that
** it is impossible to overread the yy_lookaside[] table regardless of
** the lookaside token.  This is done for the terminal symbols, as they
** come from external inputs and can contain syntax errors.  When makeItSafe
** is false, there is more flexibility in selecting offsets, resulting in
** a smaller table.  For non-terminal symbols, which are never syntax errors,
** makeItSafe can be false.
*/
int acttab_insert(acttab *p, int makeItSafe){
  int i, j, k, n, end;
  assert( p->nLookahead>0 );

  /* Make sure we have enough space to hold the expanded action table
  ** in the worst case.  The worst case occurs if the transaction set
  ** must be appended to the current action table
  */
  n = p->nsymbol + 1;
  if( p->nAction + n >= p->nActionAlloc ){
    int oldAlloc = p->nActionAlloc;
    p->nActionAlloc = p->nAction + n + p->nActionAlloc + 20;
    p->aAction = (struct lookahead_action *) realloc( p->aAction,
                          sizeof(p->aAction[0])*p->nActionAlloc);
    if( p->aAction==0 ){
      fprintf(stderr,"malloc failed\n");
      exit(1);
    }
    for(i=oldAlloc; i<p->nActionAlloc; i++){
      p->aAction[i].lookahead = -1;
      p->aAction[i].action = -1;
    }
  }

  /* Scan the existing action table looking for an offset that is a
  ** duplicate of the current transaction set.  Fall out of the loop
  ** if and when the duplicate is found.
  **
  ** i is the index in p->aAction[] where p->mnLookahead is inserted.
  */
  end = makeItSafe ? p->mnLookahead : 0;
  for(i=p->nAction-1; i>=end; i--){
    if( p->aAction[i].lookahead==p->mnLookahead ){
      /* All lookaheads and actions in the aLookahead[] transaction
      ** must match against the candidate aAction[i] entry. */
      if( p->aAction[i].action!=p->mnAction ) continue;
      for(j=0; j<p->nLookahead; j++){
        k = p->aLookahead[j].lookahead - p->mnLookahead + i;
        if( k<0 || k>=p->nAction ) break;
        if( p->aLookahead[j].lookahead!=p->aAction[k].lookahead ) break;
        if( p->aLookahead[j].action!=p->aAction[k].action ) break;
      }
      if( j<p->nLookahead ) continue;

      /* No possible lookahead value that is not in the aLookahead[]
      ** transaction is allowed to match aAction[i] */
      n = 0;
      for(j=0; j<p->nAction; j++){
        if( p->aAction[j].lookahead<0 ) continue;
        if( p->aAction[j].lookahead==j+p->mnLookahead-i ) n++;
      }
      if( n==p->nLookahead ){
        break;  /* An exact match is found at offset i */
      }
    }
  }

  /* If no existing offsets exactly match the current transaction, find an
  ** an empty offset in the aAction[] table in which we can add the
  ** aLookahead[] transaction.
  */
  if( i<end ){
    /* Look for holes in the aAction[] table that fit the current
    ** aLookahead[] transaction.  Leave i set to the offset of the hole.
    ** If no holes are found, i is left at p->nAction, which means the
    ** transaction will be appended. */
    i = makeItSafe ? p->mnLookahead : 0;
    for(; i<p->nActionAlloc - p->mxLookahead; i++){
      if( p->aAction[i].lookahead<0 ){
        for(j=0; j<p->nLookahead; j++){
          k = p->aLookahead[j].lookahead - p->mnLookahead + i;
          if( k<0 ) break;
          if( p->aAction[k].lookahead>=0 ) break;
        }
        if( j<p->nLookahead ) continue;
        for(j=0; j<p->nAction; j++){
          if( p->aAction[j].lookahead==j+p->mnLookahead-i ) break;
        }
        if( j==p->nAction ){
          break;  /* Fits in empty slots */
        }
      }
    }
  }
  /* Insert transaction set at index i. */
#if 0
  printf("Acttab:");
  for(j=0; j<p->nLookahead; j++){
    printf(" %d", p->aLookahead[j].lookahead);
  }
  printf(" inserted at %d\n", i);
#endif
  for(j=0; j<p->nLookahead; j++){
    k = p->aLookahead[j].lookahead - p->mnLookahead + i;
    p->aAction[k] = p->aLookahead[j];
    if( k>=p->nAction ) p->nAction = k+1;
  }
  if( makeItSafe && i+p->nterminal>=p->nAction ) p->nAction = i+p->nterminal+1;
  p->nLookahead = 0;

  /* Return the offset that is added to the lookahead in order to get the
  ** index into yy_action of the action */
  return i - p->mnLookahead;
}

/*
** Return the size of the action table without the trailing syntax error
** entries.
*/
int acttab_action_size(acttab *p){
  int n = p->nAction;
  while( n>0 && p->aAction[n-1].lookahead<0 ){ n--; }
  return n;
}

/********************** From the file "build.c" *****************************/
/*
** Routines to construction the finite state machine for the LEMON
** parser generator.
*/

/* Find a precedence symbol of every rule in the grammar.
**
** Those rules which have a precedence symbol coded in the input
** grammar using the "[symbol]" construct will already have the
** rp->precsym field filled.  Other rules take as their precedence
** symbol the first RHS symbol with a defined precedence.  If there
** are not RHS symbols with a defined precedence, the precedence
** symbol field is left blank.
*/
void FindRulePrecedences(struct lemon *xp)
{
  struct rule *rp;
  for(rp=xp->rule; rp; rp=rp->next){
    if( rp->precsym==0 ){
      int i, j;
      for(i=0; i<rp->nrhs && rp->precsym==0; i++){
        struct symbol *sp = rp->rhs[i];
        if( sp->type==MULTITERMINAL ){
          for(j=0; j<sp->nsubsym; j++){
            if( sp->subsym[j]->prec>=0 ){
              rp->precsym = sp->subsym[j];
              break;
            }
          }
        }else if( sp->prec>=0 ){
          rp->precsym = rp->rhs[i];
        }
      }
    }
  }
  return;
}

/* Find all nonterminals which will generate the empty string.
** Then go back and compute the first sets of every nonterminal.
** The first set is the set of all terminal symbols which can begin
** a string generated by that nonterminal.
*/
void FindFirstSets(struct lemon *lemp)
{
  int i, j;
  struct rule *rp;
  int progress;

  for(i=0; i<lemp->nsymbol; i++){
    lemp->symbols[i]->lambda = LEMON_FALSE;
  }
  for(i=lemp->nterminal; i<lemp->nsymbol; i++){
    lemp->symbols[i]->firstset = SetNew();
  }

  /* First compute all lambdas */
  do{
    progress = 0;
    for(rp=lemp->rule; rp; rp=rp->next){
      if( rp->lhs->lambda ) continue;
      for(i=0; i<rp->nrhs; i++){
        struct symbol *sp = rp->rhs[i];
        assert( sp->type==NONTERMINAL || sp->lambda==LEMON_FALSE );
        if( sp->lambda==LEMON_FALSE ) break;
      }
      if( i==rp->nrhs ){
        rp->lhs->lambda = LEMON_TRUE;
        progress = 1;
      }
    }
  }while( progress );

  /* Now compute all first sets */
  do{
    struct symbol *s1, *s2;
    progress = 0;
    for(rp=lemp->rule; rp; rp=rp->next){
      s1 = rp->lhs;
      for(i=0; i<rp->nrhs; i++){
        s2 = rp->rhs[i];
        if( s2->type==TERMINAL ){
          progress += SetAdd(s1->firstset,s2->index);
          break;
        }else if( s2->type==MULTITERMINAL ){
          for(j=0; j<s2->nsubsym; j++){
            progress += SetAdd(s1->firstset,s2->subsym[j]->index);
          }
          break;
        }else if( s1==s2 ){
          if( s1->lambda==LEMON_FALSE ) break;
        }else{
          progress += SetUnion(s1->firstset,s2->firstset);
          if( s2->lambda==LEMON_FALSE ) break;
        }
      }
    }
  }while( progress );
  return;
}

/* Compute all LR(0) states for the grammar.  Links
** are added to between some states so that the LR(1) follow sets
** can be computed later.
*/
PRIVATE struct state *getstate(struct lemon *);  /* forward reference */
void FindStates(struct lemon *lemp)
{
  struct symbol *sp;
  struct rule *rp;

  Configlist_init();

  /* Find the start symbol */
  if( lemp->start ){
    sp = Symbol_find(lemp->start);
    if( sp==0 ){
      ErrorMsg(lemp->filename,0,
        "The specified start symbol \"%s\" is not "
        "in a nonterminal of the grammar.  \"%s\" will be used as the start "
        "symbol instead.",lemp->start,lemp->startRule->lhs->name);
      lemp->errorcnt++;
      sp = lemp->startRule->lhs;
    }
  }else if( lemp->startRule ){
    sp = lemp->startRule->lhs;
  }else{
    ErrorMsg(lemp->filename,0,"Internal error - no start rule\n");
    exit(1);
  }

  /* Make sure the start symbol doesn't occur on the right-hand side of
  ** any rule.  Report an error if it does.  (YACC would generate a new
  ** start symbol in this case.) */
  for(rp=lemp->rule; rp; rp=rp->next){
    int i;
    for(i=0; i<rp->nrhs; i++){
      if( rp->rhs[i]==sp ){   /* FIX ME:  Deal with multiterminals */
        ErrorMsg(lemp->filename,0,
          "The start symbol \"%s\" occurs on the "
          "right-hand side of a rule. This will result in a parser which "
          "does not work properly.",sp->name);
        lemp->errorcnt++;
      }
    }
  }

  /* The basis configuration set for the first state
  ** is all rules which have the start symbol as their
  ** left-hand side */
  for(rp=sp->rule; rp; rp=rp->nextlhs){
    struct config *newcfp;
    rp->lhsStart = 1;
    newcfp = Configlist_addbasis(rp,0);
    SetAdd(newcfp->fws,0);
  }

  /* Compute the first state.  All other states will be
  ** computed automatically during the computation of the first one.
  ** The returned pointer to the first state is not used. */
  (void)getstate(lemp);
  return;
}

/* Return a pointer to a state which is described by the configuration
** list which has been built from calls to Configlist_add.
*/
PRIVATE void buildshifts(struct lemon *, struct state *); /* Forwd ref */
PRIVATE struct state *getstate(struct lemon *lemp)
{
  struct config *cfp, *bp;
  struct state *stp;

  /* Extract the sorted basis of the new state.  The basis was constructed
  ** by prior calls to "Configlist_addbasis()". */
  Configlist_sortbasis();
  bp = Configlist_basis();

  /* Get a state with the same basis */
  stp = State_find(bp);
  if( stp ){
    /* A state with the same basis already exists!  Copy all the follow-set
    ** propagation links from the state under construction into the
    ** preexisting state, then return a pointer to the preexisting state */
    struct config *x, *y;
    for(x=bp, y=stp->bp; x && y; x=x->bp, y=y->bp){
      Plink_copy(&y->bplp,x->bplp);
      Plink_delete(x->fplp);
      x->fplp = x->bplp = 0;
    }
    cfp = Configlist_return();
    Configlist_eat(cfp);
  }else{
    /* This really is a new state.  Construct all the details */
    Configlist_closure(lemp);    /* Compute the configuration closure */
    Configlist_sort();           /* Sort the configuration closure */
    cfp = Configlist_return();   /* Get a pointer to the config list */
    stp = State_new();           /* A new state structure */
    MemoryCheck(stp);
    stp->bp = bp;                /* Remember the configuration basis */
    stp->cfp = cfp;              /* Remember the configuration closure */
    stp->statenum = lemp->nstate++; /* Every state gets a sequence number */
    stp->ap = 0;                 /* No actions, yet. */
    State_insert(stp,stp->bp);   /* Add to the state table */
    buildshifts(lemp,stp);       /* Recursively compute successor states */
  }
  return stp;
}

/*
** Return true if two symbols are the same.
*/
int same_symbol(struct symbol *a, struct symbol *b)
{
  int i;
  if( a==b ) return 1;
  if( a->type!=MULTITERMINAL ) return 0;
  if( b->type!=MULTITERMINAL ) return 0;
  if( a->nsubsym!=b->nsubsym ) return 0;
  for(i=0; i<a->nsubsym; i++){
    if( a->subsym[i]!=b->subsym[i] ) return 0;
  }
  return 1;
}

/* Construct all successor states to the given state.  A "successor"
** state is any state which can be reached by a shift action.
*/
PRIVATE void buildshifts(struct lemon *lemp, struct state *stp)
{
  struct config *cfp;  /* For looping thru the config closure of "stp" */
  struct config *bcfp; /* For the inner loop on config closure of "stp" */
  struct config *newcfg;  /* */
  struct symbol *sp;   /* Symbol following the dot in configuration "cfp" */
  struct symbol *bsp;  /* Symbol following the dot in configuration "bcfp" */
  struct state *newstp; /* A pointer to a successor state */

  /* Each configuration becomes complete after it contributes to a successor
  ** state.  Initially, all configurations are incomplete */
  for(cfp=stp->cfp; cfp; cfp=cfp->next) cfp->status = INCOMPLETE;

  /* Loop through all configurations of the state "stp" */
  for(cfp=stp->cfp; cfp; cfp=cfp->next){
    if( cfp->status==COMPLETE ) continue;    /* Already used by inner loop */
    if( cfp->dot>=cfp->rp->nrhs ) continue;  /* Can't shift this config */
    Configlist_reset();                      /* Reset the new config set */
    sp = cfp->rp->rhs[cfp->dot];             /* Symbol after the dot */

    /* For every configuration in the state "stp" which has the symbol "sp"
    ** following its dot, add the same configuration to the basis set under
    ** construction but with the dot shifted one symbol to the right. */
    for(bcfp=cfp; bcfp; bcfp=bcfp->next){
      if( bcfp->status==COMPLETE ) continue;    /* Already used */
      if( bcfp->dot>=bcfp->rp->nrhs ) continue; /* Can't shift this one */
      bsp = bcfp->rp->rhs[bcfp->dot];           /* Get symbol after dot */
      if( !same_symbol(bsp,sp) ) continue;      /* Must be same as for "cfp" */
      bcfp->status = COMPLETE;                  /* Mark this config as used */
      newcfg = Configlist_addbasis(bcfp->rp,bcfp->dot+1);
      Plink_add(&newcfg->bplp,bcfp);
    }

    /* Get a pointer to the state described by the basis configuration set
    ** constructed in the preceding loop */
    newstp = getstate(lemp);

    /* The state "newstp" is reached from the state "stp" by a shift action
    ** on the symbol "sp" */
    if( sp->type==MULTITERMINAL ){
      int i;
      for(i=0; i<sp->nsubsym; i++){
        Action_add(&stp->ap,SHIFT,sp->subsym[i],(char*)newstp);
      }
    }else{
      Action_add(&stp->ap,SHIFT,sp,(char *)newstp);
    }
  }
}

/*
** Construct the propagation links
*/
void FindLinks(struct lemon *lemp)
{
  int i;
  struct config *cfp, *other;
  struct state *stp;
  struct plink *plp;

  /* Housekeeping detail:
  ** Add to every propagate link a pointer back to the state to
  ** which the link is attached. */
  for(i=0; i<lemp->nstate; i++){
    stp = lemp->sorted[i];
    for(cfp=stp?stp->cfp:0; cfp; cfp=cfp->next){
      cfp->stp = stp;
    }
  }

  /* Convert all backlinks into forward links.  Only the forward
  ** links are used in the follow-set computation. */
  for(i=0; i<lemp->nstate; i++){
    stp = lemp->sorted[i];
    for(cfp=stp?stp->cfp:0; cfp; cfp=cfp->next){
      for(plp=cfp->bplp; plp; plp=plp->next){
        other = plp->cfp;
        Plink_add(&other->fplp,cfp);
      }
    }
  }
}

/* Compute all followsets.
**
** A followset is the set of all symbols which can come immediately
** after a configuration.
*/
void FindFollowSets(struct lemon *lemp)
{
  int i;
  struct config *cfp;
  struct plink *plp;
  int progress;
  int change;

  for(i=0; i<lemp->nstate; i++){
    assert( lemp->sorted[i]!=0 );
    for(cfp=lemp->sorted[i]->cfp; cfp; cfp=cfp->next){
      cfp->status = INCOMPLETE;
    }
  }

  do{
    progress = 0;
    for(i=0; i<lemp->nstate; i++){
      assert( lemp->sorted[i]!=0 );
      for(cfp=lemp->sorted[i]->cfp; cfp; cfp=cfp->next){
        if( cfp->status==COMPLETE ) continue;
        for(plp=cfp->fplp; plp; plp=plp->next){
          change = SetUnion(plp->cfp->fws,cfp->fws);
          if( change ){
            plp->cfp->status = INCOMPLETE;
            progress = 1;
          }
        }
        cfp->status = COMPLETE;
      }
    }
  }while( progress );
}

static int resolve_conflict(struct action *,struct action *);

/* Compute the reduce actions, and resolve conflicts.
*/
void FindActions(struct lemon *lemp)
{
  int i,j;
  struct config *cfp;
  struct state *stp;
  struct symbol *sp;
  struct rule *rp;

  /* Add all of the reduce actions
  ** A reduce action is added for each element of the followset of
  ** a configuration which has its dot at the extreme right.
  */
  for(i=0; i<lemp->nstate; i++){   /* Loop over all states */
    stp = lemp->sorted[i];
    for(cfp=stp->cfp; cfp; cfp=cfp->next){  /* Loop over all configurations */
      if( cfp->rp->nrhs==cfp->dot ){        /* Is dot at extreme right? */
        for(j=0; j<lemp->nterminal; j++){
          if( SetFind(cfp->fws,j) ){
            /* Add a reduce action to the state "stp" which will reduce by the
            ** rule "cfp->rp" if the lookahead symbol is "lemp->symbols[j]" */
            Action_add(&stp->ap,REDUCE,lemp->symbols[j],(char *)cfp->rp);
          }
        }
      }
    }
  }

  /* Add the accepting token */
  if( lemp->start ){
    sp = Symbol_find(lemp->start);
    if( sp==0 ){
      if( lemp->startRule==0 ){
        fprintf(stderr, "internal error on source line %d: no start rule\n",
                __LINE__);
        exit(1);
      }
      sp = lemp->startRule->lhs;
    }
  }else{
    sp = lemp->startRule->lhs;
  }
  /* Add to the first state (which is always the starting state of the
  ** finite state machine) an action to ACCEPT if the lookahead is the
  ** start nonterminal.  */
  Action_add(&lemp->sorted[0]->ap,ACCEPT,sp,0);

  /* Resolve conflicts */
  for(i=0; i<lemp->nstate; i++){
    struct action *ap, *nap;
    stp = lemp->sorted[i];
    /* assert( stp->ap ); */
    stp->ap = Action_sort(stp->ap);
    for(ap=stp->ap; ap && ap->next; ap=ap->next){
      for(nap=ap->next; nap && nap->sp==ap->sp; nap=nap->next){
         /* The two actions "ap" and "nap" have the same lookahead.
         ** Figure out which one should be used */
         lemp->nconflict += resolve_conflict(ap,nap);
      }
    }
  }

  /* Report an error for each rule that can never be reduced. */
  for(rp=lemp->rule; rp; rp=rp->next) rp->canReduce = LEMON_FALSE;
  for(i=0; i<lemp->nstate; i++){
    struct action *ap;
    for(ap=lemp->sorted[i]->ap; ap; ap=ap->next){
      if( ap->type==REDUCE ) ap->x.rp->canReduce = LEMON_TRUE;
    }
  }
  for(rp=lemp->rule; rp; rp=rp->next){
    if( rp->canReduce ) continue;
    ErrorMsg(lemp->filename,rp->ruleline,"This rule can not be reduced.\n");
    lemp->errorcnt++;
  }
}

/* Resolve a conflict between the two given actions.  If the
** conflict can't be resolved, return non-zero.
**
** NO LONGER TRUE:
**   To resolve a conflict, first look to see if either action
**   is on an error rule.  In that case, take the action which
**   is not associated with the error rule.  If neither or both
**   actions are associated with an error rule, then try to
**   use precedence to resolve the conflict.
**
** If either action is a SHIFT, then it must be apx.  This
** function won't work if apx->type==REDUCE and apy->type==SHIFT.
*/
static int resolve_conflict(
  struct action *apx,
  struct action *apy
){
  struct symbol *spx, *spy;
  int errcnt = 0;
  assert( apx->sp==apy->sp );  /* Otherwise there would be no conflict */
  if( apx->type==SHIFT && apy->type==SHIFT ){
    apy->type = SSCONFLICT;
    errcnt++;
  }
  if( apx->type==SHIFT && apy->type==REDUCE ){
    spx = apx->sp;
    spy = apy->x.rp->precsym;
    if( spy==0 || spx->prec<0 || spy->prec<0 ){
      /* Not enough precedence information. */
      apy->type = SRCONFLICT;
      errcnt++;
    }else if( spx->prec>spy->prec ){    /* higher precedence wins */
      apy->type = RD_RESOLVED;
    }else if( spx->prec<spy->prec ){
      apx->type = SH_RESOLVED;
    }else if( spx->prec==spy->prec && spx->assoc==RIGHT ){ /* Use operator */
      apy->type = RD_RESOLVED;                             /* associativity */
    }else if( spx->prec==spy->prec && spx->assoc==LEFT ){  /* to break tie */
      apx->type = SH_RESOLVED;
    }else{
      assert( spx->prec==spy->prec && spx->assoc==NONE );
      apx->type = ERROR;
    }
  }else if( apx->type==REDUCE && apy->type==REDUCE ){
    spx = apx->x.rp->precsym;
    spy = apy->x.rp->precsym;
    if( spx==0 || spy==0 || spx->prec<0 ||
    spy->prec<0 || spx->prec==spy->prec ){
      apy->type = RRCONFLICT;
      errcnt++;
    }else if( spx->prec>spy->prec ){
      apy->type = RD_RESOLVED;
    }else if( spx->prec<spy->prec ){
      apx->type = RD_RESOLVED;
    }
  }else{
    assert(
      apx->type==SH_RESOLVED ||
      apx->type==RD_RESOLVED ||
      apx->type==SSCONFLICT ||
      apx->type==SRCONFLICT ||
      apx->type==RRCONFLICT ||
      apy->type==SH_RESOLVED ||
      apy->type==RD_RESOLVED ||
      apy->type==SSCONFLICT ||
      apy->type==SRCONFLICT ||
      apy->type==RRCONFLICT
    );
    /* The REDUCE/SHIFT case cannot happen because SHIFTs come before
    ** REDUCEs on the list.  If we reach this point it must be because
    ** the parser conflict had already been resolved. */
  }
  return errcnt;
}
/********************* From the file "configlist.c" *************************/
/*
** Routines to processing a configuration list and building a state
** in the LEMON parser generator.
*/

static struct config *freelist = 0;      /* List of free configurations */
static struct config *current = 0;       /* Top of list of configurations */
static struct config **currentend = 0;   /* Last on list of configs */
static struct config *basis = 0;         /* Top of list of basis configs */
static struct config **basisend = 0;     /* End of list of basis configs */

/* Return a pointer to a new configuration */
PRIVATE struct config *newconfig(void){
  return (struct config*)calloc(1, sizeof(struct config));
}

/* The configuration "old" is no longer used */
PRIVATE void deleteconfig(struct config *old)
{
  old->next = freelist;
  freelist = old;
}

/* Initialized the configuration list builder */
void Configlist_init(void){
  current = 0;
  currentend = &current;
  basis = 0;
  basisend = &basis;
  Configtable_init();
  return;
}

/* Initialized the configuration list builder */
void Configlist_reset(void){
  current = 0;
  currentend = &current;
  basis = 0;
  basisend = &basis;
  Configtable_clear(0);
  return;
}

/* Add another configuration to the configuration list */
struct config *Configlist_add(
  struct rule *rp,    /* The rule */
  int dot             /* Index into the RHS of the rule where the dot goes */
){
  struct config *cfp, model;

  assert( currentend!=0 );
  model.rp = rp;
  model.dot = dot;
  cfp = Configtable_find(&model);
  if( cfp==0 ){
    cfp = newconfig();
    cfp->rp = rp;
    cfp->dot = dot;
    cfp->fws = SetNew();
    cfp->stp = 0;
    cfp->fplp = cfp->bplp = 0;
    cfp->next = 0;
    cfp->bp = 0;
    *currentend = cfp;
    currentend = &cfp->next;
    Configtable_insert(cfp);
  }
  return cfp;
}

/* Add a basis configuration to the configuration list */
struct config *Configlist_addbasis(struct rule *rp, int dot)
{
  struct config *cfp, model;

  assert( basisend!=0 );
  assert( currentend!=0 );
  model.rp = rp;
  model.dot = dot;
  cfp = Configtable_find(&model);
  if( cfp==0 ){
    cfp = newconfig();
    cfp->rp = rp;
    cfp->dot = dot;
    cfp->fws = SetNew();
    cfp->stp = 0;
    cfp->fplp = cfp->bplp = 0;
    cfp->next = 0;
    cfp->bp = 0;
    *currentend = cfp;
    currentend = &cfp->next;
    *basisend = cfp;
    basisend = &cfp->bp;
    Configtable_insert(cfp);
  }
  return cfp;
}

/* Compute the closure of the configuration list */
void Configlist_closure(struct lemon *lemp)
{
  struct config *cfp, *newcfp;
  struct rule *rp, *newrp;
  struct symbol *sp, *xsp;
  int i, dot;

  assert( currentend!=0 );
  for(cfp=current; cfp; cfp=cfp->next){
    rp = cfp->rp;
    dot = cfp->dot;
    if( dot>=rp->nrhs ) continue;
    sp = rp->rhs[dot];
    if( sp->type==NONTERMINAL ){
      if( sp->rule==0 && sp!=lemp->errsym ){
        ErrorMsg(lemp->filename,rp->line,"Nonterminal \"%s\" has no rules.",
          sp->name);
        lemp->errorcnt++;
      }
      for(newrp=sp->rule; newrp; newrp=newrp->nextlhs){
        newcfp = Configlist_add(newrp,0);
        for(i=dot+1; i<rp->nrhs; i++){
          xsp = rp->rhs[i];
          if( xsp->type==TERMINAL ){
            SetAdd(newcfp->fws,xsp->index);
            break;
          }else if( xsp->type==MULTITERMINAL ){
            int k;
            for(k=0; k<xsp->nsubsym; k++){
              SetAdd(newcfp->fws, xsp->subsym[k]->index);
            }
            break;
          }else{
            SetUnion(newcfp->fws,xsp->firstset);
            if( xsp->lambda==LEMON_FALSE ) break;
          }
        }
        if( i==rp->nrhs ) Plink_add(&cfp->fplp,newcfp);
      }
    }
  }
  return;
}

/* Sort the configuration list */
void Configlist_sort(void){
  current = (struct config*)msort((char*)current,(char**)&(current->next),
                                  Configcmp);
  currentend = 0;
  return;
}

/* Sort the basis configuration list */
void Configlist_sortbasis(void){
  basis = (struct config*)msort((char*)current,(char**)&(current->bp),
                                Configcmp);
  basisend = 0;
  return;
}

/* Return a pointer to the head of the configuration list and
** reset the list */
struct config *Configlist_return(void){
  struct config *old;
  old = current;
  current = 0;
  currentend = 0;
  return old;
}

/* Return a pointer to the head of the configuration list and
** reset the list */
struct config *Configlist_basis(void){
  struct config *old;
  old = basis;
  basis = 0;
  basisend = 0;
  return old;
}

/* Free all elements of the given configuration list */
void Configlist_eat(struct config *cfp)
{
  struct config *nextcfp;
  for(; cfp; cfp=nextcfp){
    nextcfp = cfp->next;
    assert( cfp->fplp==0 );
    assert( cfp->bplp==0 );
    if( cfp->fws ) SetFree(cfp->fws);
    deleteconfig(cfp);
  }
  return;
}
/***************** From the file "error.c" *********************************/
/*
** Code for printing error message.
*/

void ErrorMsg(const char *filename, int lineno, const char *format, ...){
  va_list ap;
  fprintf(stderr, "%s:%d: ", filename, lineno);
  va_start(ap, format);
  vfprintf(stderr,format,ap);
  va_end(ap);
  fprintf(stderr, "\n");
}
/**************** From the file "main.c" ************************************/
/*
** Main program file for the LEMON parser generator.
*/

/* Report an out-of-memory condition and abort.  This function
** is used mostly by the "MemoryCheck" macro in struct.h
*/
void memory_error(void){
  fprintf(stderr,"Out of memory.  Aborting...\n");
  exit(1);
}

static int nDefine = 0;      /* Number of -D options on the command line */
static char **azDefine = 0;  /* Name of the -D macros */

/* This routine is called with the argument to each -D command-line option.
** Add the macro defined to the azDefine array.
*/
static void handle_D_option(char *z){
  char **paz;
  nDefine++;
  azDefine = (char **) realloc(azDefine, sizeof(azDefine[0])*nDefine);
  if( azDefine==0 ){
    fprintf(stderr,"out of memory\n");
    exit(1);
  }
  paz = &azDefine[nDefine-1];
  *paz = (char *) malloc( lemonStrlen(z)+1 );
  if( *paz==0 ){
    fprintf(stderr,"out of memory\n");
    exit(1);
  }
  lemon_strcpy(*paz, z);
  for(z=*paz; *z && *z!='='; z++){}
  *z = 0;
}

/* Rember the name of the output directory 
*/
static char *outputDir = NULL;
static void handle_d_option(char *z){
  outputDir = (char *) malloc( lemonStrlen(z)+1 );
  if( outputDir==0 ){
    fprintf(stderr,"out of memory\n");
    exit(1);
  }
  lemon_strcpy(outputDir, z);
}

static char *user_templatename = NULL;
static void handle_T_option(char *z){
  user_templatename = (char *) malloc( lemonStrlen(z)+1 );
  if( user_templatename==0 ){
    memory_error();
  }
  lemon_strcpy(user_templatename, z);
}

/* Merge together to lists of rules ordered by rule.iRule */
static struct rule *Rule_merge(struct rule *pA, struct rule *pB){
  struct rule *pFirst = 0;
  struct rule **ppPrev = &pFirst;
  while( pA && pB ){
    if( pA->iRule<pB->iRule ){
      *ppPrev = pA;
      ppPrev = &pA->next;
      pA = pA->next;
    }else{
      *ppPrev = pB;
      ppPrev = &pB->next;
      pB = pB->next;
    }
  }
  if( pA ){
    *ppPrev = pA;
  }else{
    *ppPrev = pB;
  }
  return pFirst;
}

/*
** Sort a list of rules in order of increasing iRule value
*/
static struct rule *Rule_sort(struct rule *rp){
  unsigned int i;
  struct rule *pNext;
  struct rule *x[32];
  memset(x, 0, sizeof(x));
  while( rp ){
    pNext = rp->next;
    rp->next = 0;
    for(i=0; i<sizeof(x)/sizeof(x[0])-1 && x[i]; i++){
      rp = Rule_merge(x[i], rp);
      x[i] = 0;
    }
    x[i] = rp;
    rp = pNext;
  }
  rp = 0;
  for(i=0; i<sizeof(x)/sizeof(x[0]); i++){
    rp = Rule_merge(x[i], rp);
  }
  return rp;
}

/* forward reference */
static const char *minimum_size_type(int lwr, int upr, int *pnByte);

/* Print a single line of the "Parser Stats" output
*/
static void stats_line(const char *zLabel, int iValue){
  int nLabel = lemonStrlen(zLabel);
  printf("  %s%.*s %5d\n", zLabel,
         35-nLabel, "................................",
         iValue);
}

/* The main program.  Parse the command line and do it... */
int main(int argc, char **argv){
  static int version = 0;
  static int rpflag = 0;
  static int basisflag = 0;
  static int compress = 0;
  static int quiet = 0;
  static int statistics = 0;
  static int mhflag = 0;
  static int nolinenosflag = 0;
  static int noResort = 0;
  static int sqlFlag = 0;
  static int printPP = 0;
  
  static struct s_options options[] = {
    {OPT_FLAG, "b", (char*)&basisflag, "Print only the basis in report."},
    {OPT_FLAG, "c", (char*)&compress, "Don't compress the action table."},
    {OPT_FSTR, "d", (char*)&handle_d_option, "Output directory.  Default '.'"},
    {OPT_FSTR, "D", (char*)handle_D_option, "Define an %ifdef macro."},
    {OPT_FLAG, "E", (char*)&printPP, "Print input file after preprocessing."},
    {OPT_FSTR, "f", 0, "Ignored.  (Placeholder for -f compiler options.)"},
    {OPT_FLAG, "g", (char*)&rpflag, "Print grammar without actions."},
    {OPT_FSTR, "I", 0, "Ignored.  (Placeholder for '-I' compiler options.)"},
    {OPT_FLAG, "m", (char*)&mhflag, "Output a makeheaders compatible file."},
    {OPT_FLAG, "l", (char*)&nolinenosflag, "Do not print #line statements."},
    {OPT_FSTR, "O", 0, "Ignored.  (Placeholder for '-O' compiler options.)"},
    {OPT_FLAG, "p", (char*)&showPrecedenceConflict,
                    "Show conflicts resolved by precedence rules"},
    {OPT_FLAG, "q", (char*)&quiet, "(Quiet) Don't print the report file."},
    {OPT_FLAG, "r", (char*)&noResort, "Do not sort or renumber states"},
    {OPT_FLAG, "s", (char*)&statistics,
                                   "Print parser stats to standard output."},
    {OPT_FLAG, "S", (char*)&sqlFlag,
                    "Generate the *.sql file describing the parser tables."},
    {OPT_FLAG, "x", (char*)&version, "Print the version number."},
    {OPT_FSTR, "T", (char*)handle_T_option, "Specify a template file."},
    {OPT_FSTR, "W", 0, "Ignored.  (Placeholder for '-W' compiler options.)"},
    {OPT_FLAG,0,0,0}
  };
  int i;
  int exitcode;
  struct lemon lem;
  struct rule *rp;

  (void)argc;
  OptInit(argv,options,stderr);
  if( version ){
     printf("Lemon version 1.0\n");
     exit(0);
  }
  if( OptNArgs()!=1 ){
    fprintf(stderr,"Exactly one filename argument is required.\n");
    exit(1);
  }
  memset(&lem, 0, sizeof(lem));
  lem.errorcnt = 0;

  /* Initialize the machine */
  Strsafe_init();
  Symbol_init();
  State_init();
  lem.argv0 = argv[0];
  lem.filename = OptArg(0);
  lem.basisflag = basisflag;
  lem.nolinenosflag = nolinenosflag;
  lem.printPreprocessed = printPP;
  Symbol_new("$");

  /* Parse the input file */
  Parse(&lem);
  if( lem.printPreprocessed || lem.errorcnt ) exit(lem.errorcnt);
  if( lem.nrule==0 ){
    fprintf(stderr,"Empty grammar.\n");
    exit(1);
  }
  lem.errsym = Symbol_find("error");

  /* Count and index the symbols of the grammar */
  Symbol_new("{default}");
  lem.nsymbol = Symbol_count();
  lem.symbols = Symbol_arrayof();
  for(i=0; i<lem.nsymbol; i++) lem.symbols[i]->index = i;
  qsort(lem.symbols,lem.nsymbol,sizeof(struct symbol*), Symbolcmpp);
  for(i=0; i<lem.nsymbol; i++) lem.symbols[i]->index = i;
  while( lem.symbols[i-1]->type==MULTITERMINAL ){ i--; }
  assert( strcmp(lem.symbols[i-1]->name,"{default}")==0 );
  lem.nsymbol = i - 1;
  for(i=1; ISUPPER(lem.symbols[i]->name[0]); i++);
  lem.nterminal = i;

  /* Assign sequential rule numbers.  Start with 0.  Put rules that have no
  ** reduce action C-code associated with them last, so that the switch()
  ** statement that selects reduction actions will have a smaller jump table.
  */
  for(i=0, rp=lem.rule; rp; rp=rp->next){
    rp->iRule = rp->code ? i++ : -1;
  }
  lem.nruleWithAction = i;
  for(rp=lem.rule; rp; rp=rp->next){
    if( rp->iRule<0 ) rp->iRule = i++;
  }
  lem.startRule = lem.rule;
  lem.rule = Rule_sort(lem.rule);

  /* Generate a reprint of the grammar, if requested on the command line */
  if( rpflag ){
    Reprint(&lem);
  }else{
    /* Initialize the size for all follow and first sets */
    SetSize(lem.nterminal+1);

    /* Find the precedence for every production rule (that has one) */
    FindRulePrecedences(&lem);

    /* Compute the lambda-nonterminals and the first-sets for every
    ** nonterminal */
    FindFirstSets(&lem);

    /* Compute all LR(0) states.  Also record follow-set propagation
    ** links so that the follow-set can be computed later */
    lem.nstate = 0;
    FindStates(&lem);
    lem.sorted = State_arrayof();

    /* Tie up loose ends on the propagation links */
    FindLinks(&lem);

    /* Compute the follow set of every reducible configuration */
    FindFollowSets(&lem);

    /* Compute the action tables */
    FindActions(&lem);

    /* Compress the action tables */
    if( compress==0 ) CompressTables(&lem);

    /* Reorder and renumber the states so that states with fewer choices
    ** occur at the end.  This is an optimization that helps make the
    ** generated parser tables smaller. */
    if( noResort==0 ) ResortStates(&lem);

    /* Generate a report of the parser generated.  (the "y.output" file) */
    if( !quiet ) ReportOutput(&lem);

    /* Generate the source code for the parser */
    ReportTable(&lem, mhflag, sqlFlag);

    /* Produce a header file for use by the scanner.  (This step is
    ** omitted if the "-m" option is used because makeheaders will
    ** generate the file for us.) */
    if( !mhflag ) ReportHeader(&lem);
  }
  if( statistics ){
    printf("Parser statistics:\n");
    stats_line("terminal symbols", lem.nterminal);
    stats_line("non-terminal symbols", lem.nsymbol - lem.nterminal);
    stats_line("total symbols", lem.nsymbol);
    stats_line("rules", lem.nrule);
    stats_line("states", lem.nxstate);
    stats_line("conflicts", lem.nconflict);
    stats_line("action table entries", lem.nactiontab);
    stats_line("lookahead table entries", lem.nlookaheadtab);
    stats_line("total table size (bytes)", lem.tablesize);
  }
  if( lem.nconflict > 0 ){
    fprintf(stderr,"%d parsing conflicts.\n",lem.nconflict);
  }

  /* return 0 on success, 1 on failure. */
  exitcode = ((lem.errorcnt > 0) || (lem.nconflict > 0)) ? 1 : 0;
  exit(exitcode);
  return (exitcode);
}
/******************** From the file "msort.c" *******************************/
/*
** A generic merge-sort program.
**
** USAGE:
** Let "ptr" be a pointer to some structure which is at the head of
** a null-terminated list.  Then to sort the list call:
**
**     ptr = msort(ptr,&(ptr->next),cmpfnc);
**
** In the above, "cmpfnc" is a pointer to a function which compares
** two instances of the structure and returns an integer, as in
** strcmp.  The second argument is a pointer to the pointer to the
** second element of the linked list.  This address is used to compute
** the offset to the "next" field within the structure.  The offset to
** the "next" field must be constant for all structures in the list.
**
** The function returns a new pointer which is the head of the list
** after sorting.
**
** ALGORITHM:
** Merge-sort.
*/

/*
** Return a pointer to the next structure in the linked list.
*/
#define NEXT(A) (*(char**)(((char*)A)+offset))

/*
** Inputs:
**   a:       A sorted, null-terminated linked list.  (May be null).
**   b:       A sorted, null-terminated linked list.  (May be null).
**   cmp:     A pointer to the comparison function.
**   offset:  Offset in the structure to the "next" field.
**
** Return Value:
**   A pointer to the head of a sorted list containing the elements
**   of both a and b.
**
** Side effects:
**   The "next" pointers for elements in the lists a and b are
**   changed.
*/
static char *merge(
  char *a,
  char *b,
  int (*cmp)(const char*,const char*),
  int offset
){
  char *ptr, *head;

  if( a==0 ){
    head = b;
  }else if( b==0 ){
    head = a;
  }else{
    if( (*cmp)(a,b)<=0 ){
      ptr = a;
      a = NEXT(a);
    }else{
      ptr = b;
      b = NEXT(b);
    }
    head = ptr;
    while( a && b ){
      if( (*cmp)(a,b)<=0 ){
        NEXT(ptr) = a;
        ptr = a;
        a = NEXT(a);
      }else{
        NEXT(ptr) = b;
        ptr = b;
        b = NEXT(b);
      }
    }
    if( a ) NEXT(ptr) = a;
    else    NEXT(ptr) = b;
  }
  return head;
}

/*
** Inputs:
**   list:      Pointer to a singly-linked list of structures.
**   next:      Pointer to pointer to the second element of the list.
**   cmp:       A comparison function.
**
** Return Value:
**   A pointer to the head of a sorted list containing the elements
**   originally in list.
**
** Side effects:
**   The "next" pointers for elements in list are changed.
*/
#define LISTSIZE 30
static char *msort(
  char *list,
  char **next,
  int (*cmp)(const char*,const char*)
){
  unsigned long offset;
  char *ep;
  char *set[LISTSIZE];
  int i;
  offset = (unsigned long)((char*)next - (char*)list);
  for(i=0; i<LISTSIZE; i++) set[i] = 0;
  while( list ){
    ep = list;
    list = NEXT(list);
    NEXT(ep) = 0;
    for(i=0; i<LISTSIZE-1 && set[i]!=0; i++){
      ep = merge(ep,set[i],cmp,offset);
      set[i] = 0;
    }
    set[i] = ep;
  }
  ep = 0;
  for(i=0; i<LISTSIZE; i++) if( set[i] ) ep = merge(set[i],ep,cmp,offset);
  return ep;
}
/************************ From the file "option.c" **************************/
static char **g_argv;
static struct s_options *op;
static FILE *errstream;

#define ISOPT(X) ((X)[0]=='-'||(X)[0]=='+'||strchr((X),'=')!=0)

/*
** Print the command line with a carrot pointing to the k-th character
** of the n-th field.
*/
static void errline(int n, int k, FILE *err)
{
  int spcnt, i;
  if( g_argv[0] ){
    fprintf(err,"%s",g_argv[0]);
    spcnt = lemonStrlen(g_argv[0]) + 1;
  }else{
    spcnt = 0;
  }
  for(i=1; i<n && g_argv[i]; i++){
    fprintf(err," %s",g_argv[i]);
    spcnt += lemonStrlen(g_argv[i])+1;
  }
  spcnt += k;
  for(; g_argv[i]; i++) fprintf(err," %s",g_argv[i]);
  if( spcnt<20 ){
    fprintf(err,"\n%*s^-- here\n",spcnt,"");
  }else{
    fprintf(err,"\n%*shere --^\n",spcnt-7,"");
  }
}

/*
** Return the index of the N-th non-switch argument.  Return -1
** if N is out of range.
*/
static int argindex(int n)
{
  int i;
  int dashdash = 0;
  if( g_argv!=0 && *g_argv!=0 ){
    for(i=1; g_argv[i]; i++){
      if( dashdash || !ISOPT(g_argv[i]) ){
        if( n==0 ) return i;
        n--;
      }
      if( strcmp(g_argv[i],"--")==0 ) dashdash = 1;
    }
  }
  return -1;
}

static char emsg[] = "Command line syntax error: ";

/*
** Process a flag command line argument.
*/
static int handleflags(int i, FILE *err)
{
  int v;
  int errcnt = 0;
  int j;
  for(j=0; op[j].label; j++){
    if( strncmp(&g_argv[i][1],op[j].label,lemonStrlen(op[j].label))==0 ) break;
  }
  v = g_argv[i][0]=='-' ? 1 : 0;
  if( op[j].label==0 ){
    if( err ){
      fprintf(err,"%sundefined option.\n",emsg);
      errline(i,1,err);
    }
    errcnt++;
  }else if( op[j].arg==0 ){
    /* Ignore this option */
  }else if( op[j].type==OPT_FLAG ){
    *((int*)op[j].arg) = v;
  }else if( op[j].type==OPT_FFLAG ){
    (*(void(*)(int))(op[j].arg))(v);
  }else if( op[j].type==OPT_FSTR ){
    (*(void(*)(char *))(op[j].arg))(&g_argv[i][2]);
  }else{
    if( err ){
      fprintf(err,"%smissing argument on switch.\n",emsg);
      errline(i,1,err);
    }
    errcnt++;
  }
  return errcnt;
}

/*
** Process a command line switch which has an argument.
*/
static int handleswitch(int i, FILE *err)
{
  int lv = 0;
  double dv = 0.0;
  char *sv = 0, *end;
  char *cp;
  int j;
  int errcnt = 0;
  cp = strchr(g_argv[i],'=');
  assert( cp!=0 );
  *cp = 0;
  for(j=0; op[j].label; j++){
    if( strcmp(g_argv[i],op[j].label)==0 ) break;
  }
  *cp = '=';
  if( op[j].label==0 ){
    if( err ){
      fprintf(err,"%sundefined option.\n",emsg);
      errline(i,0,err);
    }
    errcnt++;
  }else{
    cp++;
    switch( op[j].type ){
      case OPT_FLAG:
      case OPT_FFLAG:
        if( err ){
          fprintf(err,"%soption requires an argument.\n",emsg);
          errline(i,0,err);
        }
        errcnt++;
        break;
      case OPT_DBL:
      case OPT_FDBL:
        dv = strtod(cp,&end);
        if( *end ){
          if( err ){
            fprintf(err,
               "%sillegal character in floating-point argument.\n",emsg);
            errline(i,(int)((char*)end-(char*)g_argv[i]),err);
          }
          errcnt++;
        }
        break;
      case OPT_INT:
      case OPT_FINT:
        lv = strtol(cp,&end,0);
        if( *end ){
          if( err ){
            fprintf(err,"%sillegal character in integer argument.\n",emsg);
            errline(i,(int)((char*)end-(char*)g_argv[i]),err);
          }
          errcnt++;
        }
        break;
      case OPT_STR:
      case OPT_FSTR:
        sv = cp;
        break;
    }
    switch( op[j].type ){
      case OPT_FLAG:
      case OPT_FFLAG:
        break;
      case OPT_DBL:
        *(double*)(op[j].arg) = dv;
        break;
      case OPT_FDBL:
        (*(void(*)(double))(op[j].arg))(dv);
        break;
      case OPT_INT:
        *(int*)(op[j].arg) = lv;
        break;
      case OPT_FINT:
        (*(void(*)(int))(op[j].arg))((int)lv);
        break;
      case OPT_STR:
        *(char**)(op[j].arg) = sv;
        break;
      case OPT_FSTR:
        (*(void(*)(char *))(op[j].arg))(sv);
        break;
    }
  }
  return errcnt;
}

int OptInit(char **a, struct s_options *o, FILE *err)
{
  int errcnt = 0;
  g_argv = a;
  op = o;
  errstream = err;
  if( g_argv && *g_argv && op ){
    int i;
    for(i=1; g_argv[i]; i++){
      if( g_argv[i][0]=='+' || g_argv[i][0]=='-' ){
        errcnt += handleflags(i,err);
      }else if( strchr(g_argv[i],'=') ){
        errcnt += handleswitch(i,err);
      }
    }
  }
  if( errcnt>0 ){
    fprintf(err,"Valid command line options for \"%s\" are:\n",*a);
    OptPrint();
    exit(1);
  }
  return 0;
}

int OptNArgs(void){
  int cnt = 0;
  int dashdash = 0;
  int i;
  if( g_argv!=0 && g_argv[0]!=0 ){
    for(i=1; g_argv[i]; i++){
      if( dashdash || !ISOPT(g_argv[i]) ) cnt++;
      if( strcmp(g_argv[i],"--")==0 ) dashdash = 1;
    }
  }
  return cnt;
}

char *OptArg(int n)
{
  int i;
  i = argindex(n);
  return i>=0 ? g_argv[i] : 0;
}

void OptErr(int n)
{
  int i;
  i = argindex(n);
  if( i>=0 ) errline(i,0,errstream);
}

void OptPrint(void){
  int i;
  int max, len;
  max = 0;
  for(i=0; op[i].label; i++){
    len = lemonStrlen(op[i].label) + 1;
    switch( op[i].type ){
      case OPT_FLAG:
      case OPT_FFLAG:
        break;
      case OPT_INT:
      case OPT_FINT:
        len += 9;       /* length of "<integer>" */
        break;
      case OPT_DBL:
      case OPT_FDBL:
        len += 6;       /* length of "<real>" */
        break;
      case OPT_STR:
      case OPT_FSTR:
        len += 8;       /* length of "<string>" */
        break;
    }
    if( len>max ) max = len;
  }
  for(i=0; op[i].label; i++){
    switch( op[i].type ){
      case OPT_FLAG:
      case OPT_FFLAG:
        fprintf(errstream,"  -%-*s  %s\n",max,op[i].label,op[i].message);
        break;
      case OPT_INT:
      case OPT_FINT:
        fprintf(errstream,"  -%s<integer>%*s  %s\n",op[i].label,
          (int)(max-lemonStrlen(op[i].label)-9),"",op[i].message);
        break;
      case OPT_DBL:
      case OPT_FDBL:
        fprintf(errstream,"  -%s<real>%*s  %s\n",op[i].label,
          (int)(max-lemonStrlen(op[i].label)-6),"",op[i].message);
        break;
      case OPT_STR:
      case OPT_FSTR:
        fprintf(errstream,"  -%s<string>%*s  %s\n",op[i].label,
          (int)(max-lemonStrlen(op[i].label)-8),"",op[i].message);
        break;
    }
  }
}
/*********************** From the file "parse.c" ****************************/
/*
** Input file parser for the LEMON parser generator.
*/

/* The state of the parser */
enum e_state {
  INITIALIZE,
  WAITING_FOR_DECL_OR_RULE,
  WAITING_FOR_DECL_KEYWORD,
  WAITING_FOR_DECL_ARG,
  WAITING_FOR_PRECEDENCE_SYMBOL,
  WAITING_FOR_ARROW,
  IN_RHS,
  LHS_ALIAS_1,
  LHS_ALIAS_2,
  LHS_ALIAS_3,
  RHS_ALIAS_1,
  RHS_ALIAS_2,
  PRECEDENCE_MARK_1,
  PRECEDENCE_MARK_2,
  RESYNC_AFTER_RULE_ERROR,
  RESYNC_AFTER_DECL_ERROR,
  WAITING_FOR_DESTRUCTOR_SYMBOL,
  WAITING_FOR_DATATYPE_SYMBOL,
  WAITING_FOR_FALLBACK_ID,
  WAITING_FOR_WILDCARD_ID,
  WAITING_FOR_CLASS_ID,
  WAITING_FOR_CLASS_TOKEN,
  WAITING_FOR_TOKEN_NAME
};
struct pstate {
  char *filename;       /* Name of the input file */
  int tokenlineno;      /* Linenumber at which current token starts */
  int errorcnt;         /* Number of errors so far */
  char *tokenstart;     /* Text of current token */
  struct lemon *gp;     /* Global state vector */
  enum e_state state;        /* The state of the parser */
  struct symbol *fallback;   /* The fallback token */
  struct symbol *tkclass;    /* Token class symbol */
  struct symbol *lhs;        /* Left-hand side of current rule */
  const char *lhsalias;      /* Alias for the LHS */
  int nrhs;                  /* Number of right-hand side symbols seen */
  struct symbol *rhs[MAXRHS];  /* RHS symbols */
  const char *alias[MAXRHS]; /* Aliases for each RHS symbol (or NULL) */
  struct rule *prevrule;     /* Previous rule parsed */
  const char *declkeyword;   /* Keyword of a declaration */
  char **declargslot;        /* Where the declaration argument should be put */
  int insertLineMacro;       /* Add #line before declaration insert */
  int *decllinenoslot;       /* Where to write declaration line number */
  enum e_assoc declassoc;    /* Assign this association to decl arguments */
  int preccounter;           /* Assign this precedence to decl arguments */
  struct rule *firstrule;    /* Pointer to first rule in the grammar */
  struct rule *lastrule;     /* Pointer to the most recently parsed rule */
};

/* Parse a single token */
static void parseonetoken(struct pstate *psp)
{
  const char *x;
  x = Strsafe(psp->tokenstart);     /* Save the token permanently */
#if 0
  printf("%s:%d: Token=[%s] state=%d\n",psp->filename,psp->tokenlineno,
    x,psp->state);
#endif
  switch( psp->state ){
    case INITIALIZE:
      psp->prevrule = 0;
      psp->preccounter = 0;
      psp->firstrule = psp->lastrule = 0;
      psp->gp->nrule = 0;
      /* fall through */
    case WAITING_FOR_DECL_OR_RULE:
      if( x[0]=='%' ){
        psp->state = WAITING_FOR_DECL_KEYWORD;
      }else if( ISLOWER(x[0]) ){
        psp->lhs = Symbol_new(x);
        psp->nrhs = 0;
        psp->lhsalias = 0;
        psp->state = WAITING_FOR_ARROW;
      }else if( x[0]=='{' ){
        if( psp->prevrule==0 ){
          ErrorMsg(psp->filename,psp->tokenlineno,
            "There is no prior rule upon which to attach the code "
            "fragment which begins on this line.");
          psp->errorcnt++;
        }else if( psp->prevrule->code!=0 ){
          ErrorMsg(psp->filename,psp->tokenlineno,
            "Code fragment beginning on this line is not the first "
            "to follow the previous rule.");
          psp->errorcnt++;
        }else if( strcmp(x, "{NEVER-REDUCE")==0 ){
          psp->prevrule->neverReduce = 1;
        }else{
          psp->prevrule->line = psp->tokenlineno;
          psp->prevrule->code = &x[1];
          psp->prevrule->noCode = 0;
        }
      }else if( x[0]=='[' ){
        psp->state = PRECEDENCE_MARK_1;
      }else{
        ErrorMsg(psp->filename,psp->tokenlineno,
          "Token \"%s\" should be either \"%%\" or a nonterminal name.",
          x);
        psp->errorcnt++;
      }
      break;
    case PRECEDENCE_MARK_1:
      if( !ISUPPER(x[0]) ){
        ErrorMsg(psp->filename,psp->tokenlineno,
          "The precedence symbol must be a terminal.");
        psp->errorcnt++;
      }else if( psp->prevrule==0 ){
        ErrorMsg(psp->filename,psp->tokenlineno,
          "There is no prior rule to assign precedence \"[%s]\".",x);
        psp->errorcnt++;
      }else if( psp->prevrule->precsym!=0 ){
        ErrorMsg(psp->filename,psp->tokenlineno,
          "Precedence mark on this line is not the first "
          "to follow the previous rule.");
        psp->errorcnt++;
      }else{
        psp->prevrule->precsym = Symbol_new(x);
      }
      psp->state = PRECEDENCE_MARK_2;
      break;
    case PRECEDENCE_MARK_2:
      if( x[0]!=']' ){
        ErrorMsg(psp->filename,psp->tokenlineno,
          "Missing \"]\" on precedence mark.");
        psp->errorcnt++;
      }
      psp->state = WAITING_FOR_DECL_OR_RULE;
      break;
    case WAITING_FOR_ARROW:
      if( x[0]==':' && x[1]==':' && x[2]=='=' ){
        psp->state = IN_RHS;
      }else if( x[0]=='(' ){
        psp->state = LHS_ALIAS_1;
      }else{
        ErrorMsg(psp->filename,psp->tokenlineno,
          "Expected to see a \":\" following the LHS symbol \"%s\".",
          psp->lhs->name);
        psp->errorcnt++;
        psp->state = RESYNC_AFTER_RULE_ERROR;
      }
      break;
    case LHS_ALIAS_1:
      if( ISALPHA(x[0]) ){
        psp->lhsalias = x;
        psp->state = LHS_ALIAS_2;
      }else{
        ErrorMsg(psp->filename,psp->tokenlineno,
          "\"%s\" is not a valid alias for the LHS \"%s\"\n",
          x,psp->lhs->name);
        psp->errorcnt++;
        psp->state = RESYNC_AFTER_RULE_ERROR;
      }
      break;
    case LHS_ALIAS_2:
      if( x[0]==')' ){
        psp->state = LHS_ALIAS_3;
      }else{
        ErrorMsg(psp->filename,psp->tokenlineno,
          "Missing \")\" following LHS alias name \"%s\".",psp->lhsalias);
        psp->errorcnt++;
        psp->state = RESYNC_AFTER_RULE_ERROR;
      }
      break;
    case LHS_ALIAS_3:
      if( x[0]==':' && x[1]==':' && x[2]=='=' ){
        psp->state = IN_RHS;
      }else{
        ErrorMsg(psp->filename,psp->tokenlineno,
          "Missing \"->\" following: \"%s(%s)\".",
           psp->lhs->name,psp->lhsalias);
        psp->errorcnt++;
        psp->state = RESYNC_AFTER_RULE_ERROR;
      }
      break;
    case IN_RHS:
      if( x[0]=='.' ){
        struct rule *rp;
        rp = (struct rule *)calloc( sizeof(struct rule) +
             sizeof(struct symbol*)*psp->nrhs + sizeof(char*)*psp->nrhs, 1);
        if( rp==0 ){
          ErrorMsg(psp->filename,psp->tokenlineno,
            "Can't allocate enough memory for this rule.");
          psp->errorcnt++;
          psp->prevrule = 0;
        }else{
          int i;
          rp->ruleline = psp->tokenlineno;
          rp->rhs = (struct symbol**)&rp[1];
          rp->rhsalias = (const char**)&(rp->rhs[psp->nrhs]);
          for(i=0; i<psp->nrhs; i++){
            rp->rhs[i] = psp->rhs[i];
            rp->rhsalias[i] = psp->alias[i];
            if( rp->rhsalias[i]!=0 ){ rp->rhs[i]->bContent = 1; }
          }
          rp->lhs = psp->lhs;
          rp->lhsalias = psp->lhsalias;
          rp->nrhs = psp->nrhs;
          rp->code = 0;
          rp->noCode = 1;
          rp->precsym = 0;
          rp->index = psp->gp->nrule++;
          rp->nextlhs = rp->lhs->rule;
          rp->lhs->rule = rp;
          rp->next = 0;
          if( psp->firstrule==0 ){
            psp->firstrule = psp->lastrule = rp;
          }else{
            psp->lastrule->next = rp;
            psp->lastrule = rp;
          }
          psp->prevrule = rp;
        }
        psp->state = WAITING_FOR_DECL_OR_RULE;
      }else if( ISALPHA(x[0]) ){
        if( psp->nrhs>=MAXRHS ){
          ErrorMsg(psp->filename,psp->tokenlineno,
            "Too many symbols on RHS of rule beginning at \"%s\".",
            x);
          psp->errorcnt++;
          psp->state = RESYNC_AFTER_RULE_ERROR;
        }else{
          psp->rhs[psp->nrhs] = Symbol_new(x);
          psp->alias[psp->nrhs] = 0;
          psp->nrhs++;
        }
      }else if( (x[0]=='|' || x[0]=='/') && psp->nrhs>0 && ISUPPER(x[1]) ){
        struct symbol *msp = psp->rhs[psp->nrhs-1];
        if( msp->type!=MULTITERMINAL ){
          struct symbol *origsp = msp;
          msp = (struct symbol *) calloc(1,sizeof(*msp));
          memset(msp, 0, sizeof(*msp));
          msp->type = MULTITERMINAL;
          msp->nsubsym = 1;
          msp->subsym = (struct symbol **) calloc(1,sizeof(struct symbol*));
          msp->subsym[0] = origsp;
          msp->name = origsp->name;
          psp->rhs[psp->nrhs-1] = msp;
        }
        msp->nsubsym++;
        msp->subsym = (struct symbol **) realloc(msp->subsym,
          sizeof(struct symbol*)*msp->nsubsym);
        msp->subsym[msp->nsubsym-1] = Symbol_new(&x[1]);
        if( ISLOWER(x[1]) || ISLOWER(msp->subsym[0]->name[0]) ){
          ErrorMsg(psp->filename,psp->tokenlineno,
            "Cannot form a compound containing a non-terminal");
          psp->errorcnt++;
        }
      }else if( x[0]=='(' && psp->nrhs>0 ){
        psp->state = RHS_ALIAS_1;
      }else{
        ErrorMsg(psp->filename,psp->tokenlineno,
          "Illegal character on RHS of rule: \"%s\".",x);
        psp->errorcnt++;
        psp->state = RESYNC_AFTER_RULE_ERROR;
      }
      break;
    case RHS_ALIAS_1:
      if( ISALPHA(x[0]) ){
        psp->alias[psp->nrhs-1] = x;
        psp->state = RHS_ALIAS_2;
      }else{
        ErrorMsg(psp->filename,psp->tokenlineno,
          "\"%s\" is not a valid alias for the RHS symbol \"%s\"\n",
          x,psp->rhs[psp->nrhs-1]->name);
        psp->errorcnt++;
        psp->state = RESYNC_AFTER_RULE_ERROR;
      }
      break;
    case RHS_ALIAS_2:
      if( x[0]==')' ){
        psp->state = IN_RHS;
      }else{
        ErrorMsg(psp->filename,psp->tokenlineno,
          "Missing \")\" following LHS alias name \"%s\".",psp->lhsalias);
        psp->errorcnt++;
        psp->state = RESYNC_AFTER_RULE_ERROR;
      }
      break;
    case WAITING_FOR_DECL_KEYWORD:
      if( ISALPHA(x[0]) ){
        psp->declkeyword = x;
        psp->declargslot = 0;
        psp->decllinenoslot = 0;
        psp->insertLineMacro = 1;
        psp->state = WAITING_FOR_DECL_ARG;
        if( strcmp(x,"name")==0 ){
          psp->declargslot = &(psp->gp->name);
          psp->insertLineMacro = 0;
        }else if( strcmp(x,"include")==0 ){
          psp->declargslot = &(psp->gp->include);
        }else if( strcmp(x,"code")==0 ){
          psp->declargslot = &(psp->gp->extracode);
        }else if( strcmp(x,"token_destructor")==0 ){
          psp->declargslot = &psp->gp->tokendest;
        }else if( strcmp(x,"default_destructor")==0 ){
          psp->declargslot = &psp->gp->vardest;
        }else if( strcmp(x,"token_prefix")==0 ){
          psp->declargslot = &psp->gp->tokenprefix;
          psp->insertLineMacro = 0;
        }else if( strcmp(x,"syntax_error")==0 ){
          psp->declargslot = &(psp->gp->error);
        }else if( strcmp(x,"parse_accept")==0 ){
          psp->declargslot = &(psp->gp->accept);
        }else if( strcmp(x,"parse_failure")==0 ){
          psp->declargslot = &(psp->gp->failure);
        }else if( strcmp(x,"stack_overflow")==0 ){
          psp->declargslot = &(psp->gp->overflow);
        }else if( strcmp(x,"extra_argument")==0 ){
          psp->declargslot = &(psp->gp->arg);
          psp->insertLineMacro = 0;
        }else if( strcmp(x,"extra_context")==0 ){
          psp->declargslot = &(psp->gp->ctx);
          psp->insertLineMacro = 0;
        }else if( strcmp(x,"token_type")==0 ){
          psp->declargslot = &(psp->gp->tokentype);
          psp->insertLineMacro = 0;
        }else if( strcmp(x,"default_type")==0 ){
          psp->declargslot = &(psp->gp->vartype);
          psp->insertLineMacro = 0;
        }else if( strcmp(x,"stack_size")==0 ){
          psp->declargslot = &(psp->gp->stacksize);
          psp->insertLineMacro = 0;
        }else if( strcmp(x,"start_symbol")==0 ){
          psp->declargslot = &(psp->gp->start);
          psp->insertLineMacro = 0;
        }else if( strcmp(x,"left")==0 ){
          psp->preccounter++;
          psp->declassoc = LEFT;
          psp->state = WAITING_FOR_PRECEDENCE_SYMBOL;
        }else if( strcmp(x,"right")==0 ){
          psp->preccounter++;
          psp->declassoc = RIGHT;
          psp->state = WAITING_FOR_PRECEDENCE_SYMBOL;
        }else if( strcmp(x,"nonassoc")==0 ){
          psp->preccounter++;
          psp->declassoc = NONE;
          psp->state = WAITING_FOR_PRECEDENCE_SYMBOL;
        }else if( strcmp(x,"destructor")==0 ){
          psp->state = WAITING_FOR_DESTRUCTOR_SYMBOL;
        }else if( strcmp(x,"type")==0 ){
          psp->state = WAITING_FOR_DATATYPE_SYMBOL;
        }else if( strcmp(x,"fallback")==0 ){
          psp->fallback = 0;
          psp->state = WAITING_FOR_FALLBACK_ID;
        }else if( strcmp(x,"token")==0 ){
          psp->state = WAITING_FOR_TOKEN_NAME;
        }else if( strcmp(x,"wildcard")==0 ){
          psp->state = WAITING_FOR_WILDCARD_ID;
        }else if( strcmp(x,"token_class")==0 ){
          psp->state = WAITING_FOR_CLASS_ID;
        }else{
          ErrorMsg(psp->filename,psp->tokenlineno,
            "Unknown declaration keyword: \"%%%s\".",x);
          psp->errorcnt++;
          psp->state = RESYNC_AFTER_DECL_ERROR;
        }
      }else{
        ErrorMsg(psp->filename,psp->tokenlineno,
          "Illegal declaration keyword: \"%s\".",x);
        psp->errorcnt++;
        psp->state = RESYNC_AFTER_DECL_ERROR;
      }
      break;
    case WAITING_FOR_DESTRUCTOR_SYMBOL:
      if( !ISALPHA(x[0]) ){
        ErrorMsg(psp->filename,psp->tokenlineno,
          "Symbol name missing after %%destructor keyword");
        psp->errorcnt++;
        psp->state = RESYNC_AFTER_DECL_ERROR;
      }else{
        struct symbol *sp = Symbol_new(x);
        psp->declargslot = &sp->destructor;
        psp->decllinenoslot = &sp->destLineno;
        psp->insertLineMacro = 1;
        psp->state = WAITING_FOR_DECL_ARG;
      }
      break;
    case WAITING_FOR_DATATYPE_SYMBOL:
      if( !ISALPHA(x[0]) ){
        ErrorMsg(psp->filename,psp->tokenlineno,
          "Symbol name missing after %%type keyword");
        psp->errorcnt++;
        psp->state = RESYNC_AFTER_DECL_ERROR;
      }else{
        struct symbol *sp = Symbol_find(x);
        if((sp) && (sp->datatype)){
          ErrorMsg(psp->filename,psp->tokenlineno,
            "Symbol %%type \"%s\" already defined", x);
          psp->errorcnt++;
          psp->state = RESYNC_AFTER_DECL_ERROR;
        }else{
          if (!sp){
            sp = Symbol_new(x);
          }
          psp->declargslot = &sp->datatype;
          psp->insertLineMacro = 0;
          psp->state = WAITING_FOR_DECL_ARG;
        }
      }
      break;
    case WAITING_FOR_PRECEDENCE_SYMBOL:
      if( x[0]=='.' ){
        psp->state = WAITING_FOR_DECL_OR_RULE;
      }else if( ISUPPER(x[0]) ){
        struct symbol *sp;
        sp = Symbol_new(x);
        if( sp->prec>=0 ){
          ErrorMsg(psp->filename,psp->tokenlineno,
            "Symbol \"%s\" has already be given a precedence.",x);
          psp->errorcnt++;
        }else{
          sp->prec = psp->preccounter;
          sp->assoc = psp->declassoc;
        }
      }else{
        ErrorMsg(psp->filename,psp->tokenlineno,
          "Can't assign a precedence to \"%s\".",x);
        psp->errorcnt++;
      }
      break;
    case WAITING_FOR_DECL_ARG:
      if( x[0]=='{' || x[0]=='\"' || ISALNUM(x[0]) ){
        const char *zOld, *zNew;
        char *zBuf, *z;
        int nOld, n, nLine = 0, nNew, nBack;
        int addLineMacro;
        char zLine[50];
        zNew = x;
        if( zNew[0]=='"' || zNew[0]=='{' ) zNew++;
        nNew = lemonStrlen(zNew);
        if( *psp->declargslot ){
          zOld = *psp->declargslot;
        }else{
          zOld = "";
        }
        nOld = lemonStrlen(zOld);
        n = nOld + nNew + 20;
        addLineMacro = !psp->gp->nolinenosflag
                       && psp->insertLineMacro
                       && psp->tokenlineno>1
                       && (psp->decllinenoslot==0 || psp->decllinenoslot[0]!=0);
        if( addLineMacro ){
          for(z=psp->filename, nBack=0; *z; z++){
            if( *z=='\\' ) nBack++;
          }
          lemon_sprintf(zLine, "#line %d ", psp->tokenlineno);
          nLine = lemonStrlen(zLine);
          n += nLine + lemonStrlen(psp->filename) + nBack;
        }
        *psp->declargslot = (char *) realloc(*psp->declargslot, n);
        zBuf = *psp->declargslot + nOld;
        if( addLineMacro ){
          if( nOld && zBuf[-1]!='\n' ){
            *(zBuf++) = '\n';
          }
          memcpy(zBuf, zLine, nLine);
          zBuf += nLine;
          *(zBuf++) = '"';
          for(z=psp->filename; *z; z++){
            if( *z=='\\' ){
              *(zBuf++) = '\\';
            }
            *(zBuf++) = *z;
          }
          *(zBuf++) = '"';
          *(zBuf++) = '\n';
        }
        if( psp->decllinenoslot && psp->decllinenoslot[0]==0 ){
          psp->decllinenoslot[0] = psp->tokenlineno;
        }
        memcpy(zBuf, zNew, nNew);
        zBuf += nNew;
        *zBuf = 0;
        psp->state = WAITING_FOR_DECL_OR_RULE;
      }else{
        ErrorMsg(psp->filename,psp->tokenlineno,
          "Illegal argument to %%%s: %s",psp->declkeyword,x);
        psp->errorcnt++;
        psp->state = RESYNC_AFTER_DECL_ERROR;
      }
      break;
    case WAITING_FOR_FALLBACK_ID:
      if( x[0]=='.' ){
        psp->state = WAITING_FOR_DECL_OR_RULE;
      }else if( !ISUPPER(x[0]) ){
        ErrorMsg(psp->filename, psp->tokenlineno,
          "%%fallback argument \"%s\" should be a token", x);
        psp->errorcnt++;
      }else{
        struct symbol *sp = Symbol_new(x);
        if( psp->fallback==0 ){
          psp->fallback = sp;
        }else if( sp->fallback ){
          ErrorMsg(psp->filename, psp->tokenlineno,
            "More than one fallback assigned to token %s", x);
          psp->errorcnt++;
        }else{
          sp->fallback = psp->fallback;
          psp->gp->has_fallback = 1;
        }
      }
      break;
    case WAITING_FOR_TOKEN_NAME:
      /* Tokens do not have to be declared before use.  But they can be
      ** in order to control their assigned integer number.  The number for
      ** each token is assigned when it is first seen.  So by including
      **
      **     %token ONE TWO THREE.
      **
      ** early in the grammar file, that assigns small consecutive values
      ** to each of the tokens ONE TWO and THREE.
      */
      if( x[0]=='.' ){
        psp->state = WAITING_FOR_DECL_OR_RULE;
      }else if( !ISUPPER(x[0]) ){
        ErrorMsg(psp->filename, psp->tokenlineno,
          "%%token argument \"%s\" should be a token", x);
        psp->errorcnt++;
      }else{
        (void)Symbol_new(x);
      }
      break;
    case WAITING_FOR_WILDCARD_ID:
      if( x[0]=='.' ){
        psp->state = WAITING_FOR_DECL_OR_RULE;
      }else if( !ISUPPER(x[0]) ){
        ErrorMsg(psp->filename, psp->tokenlineno,
          "%%wildcard argument \"%s\" should be a token", x);
        psp->errorcnt++;
      }else{
        struct symbol *sp = Symbol_new(x);
        if( psp->gp->wildcard==0 ){
          psp->gp->wildcard = sp;
        }else{
          ErrorMsg(psp->filename, psp->tokenlineno,
            "Extra wildcard to token: %s", x);
          psp->errorcnt++;
        }
      }
      break;
    case WAITING_FOR_CLASS_ID:
      if( !ISLOWER(x[0]) ){
        ErrorMsg(psp->filename, psp->tokenlineno,
          "%%token_class must be followed by an identifier: %s", x);
        psp->errorcnt++;
        psp->state = RESYNC_AFTER_DECL_ERROR;
     }else if( Symbol_find(x) ){
        ErrorMsg(psp->filename, psp->tokenlineno,
          "Symbol \"%s\" already used", x);
        psp->errorcnt++;
        psp->state = RESYNC_AFTER_DECL_ERROR;
      }else{
        psp->tkclass = Symbol_new(x);
        psp->tkclass->type = MULTITERMINAL;
        psp->state = WAITING_FOR_CLASS_TOKEN;
      }
      break;
    case WAITING_FOR_CLASS_TOKEN:
      if( x[0]=='.' ){
        psp->state = WAITING_FOR_DECL_OR_RULE;
      }else if( ISUPPER(x[0]) || ((x[0]=='|' || x[0]=='/') && ISUPPER(x[1])) ){
        struct symbol *msp = psp->tkclass;
        msp->nsubsym++;
        msp->subsym = (struct symbol **) realloc(msp->subsym,
          sizeof(struct symbol*)*msp->nsubsym);
        if( !ISUPPER(x[0]) ) x++;
        msp->subsym[msp->nsubsym-1] = Symbol_new(x);
      }else{
        ErrorMsg(psp->filename, psp->tokenlineno,
          "%%token_class argument \"%s\" should be a token", x);
        psp->errorcnt++;
        psp->state = RESYNC_AFTER_DECL_ERROR;
      }
      break;
    case RESYNC_AFTER_RULE_ERROR:
/*      if( x[0]=='.' ) psp->state = WAITING_FOR_DECL_OR_RULE;
**      break; */
    case RESYNC_AFTER_DECL_ERROR:
      if( x[0]=='.' ) psp->state = WAITING_FOR_DECL_OR_RULE;
      if( x[0]=='%' ) psp->state = WAITING_FOR_DECL_KEYWORD;
      break;
  }
}

/* The text in the input is part of the argument to an %ifdef or %ifndef.
** Evaluate the text as a boolean expression.  Return true or false.
*/
static int eval_preprocessor_boolean(char *z, int lineno){
  int neg = 0;
  int res = 0;
  int okTerm = 1;
  int i;
  for(i=0; z[i]!=0; i++){
    if( ISSPACE(z[i]) ) continue;
    if( z[i]=='!' ){
      if( !okTerm ) goto pp_syntax_error;
      neg = !neg;
      continue;
    }
    if( z[i]=='|' && z[i+1]=='|' ){
      if( okTerm ) goto pp_syntax_error;
      if( res ) return 1;
      i++;
      okTerm = 1;
      continue;
    }
    if( z[i]=='&' && z[i+1]=='&' ){
      if( okTerm ) goto pp_syntax_error;
      if( !res ) return 0;
      i++;
      okTerm = 1;
      continue;
    }
    if( z[i]=='(' ){
      int k;
      int n = 1;
      if( !okTerm ) goto pp_syntax_error;
      for(k=i+1; z[k]; k++){
        if( z[k]==')' ){
          n--;
          if( n==0 ){
            z[k] = 0;
            res = eval_preprocessor_boolean(&z[i+1], -1);
            z[k] = ')';
            if( res<0 ){
              i = i-res;
              goto pp_syntax_error;
            }
            i = k;
            break;
          }
        }else if( z[k]=='(' ){
          n++;
        }else if( z[k]==0 ){
          i = k;
          goto pp_syntax_error;
        }
      }
      if( neg ){
        res = !res;
        neg = 0;
      }
      okTerm = 0;
      continue;
    }
    if( ISALPHA(z[i]) ){
      int j, k, n;
      if( !okTerm ) goto pp_syntax_error;
      for(k=i+1; ISALNUM(z[k]) || z[k]=='_'; k++){}
      n = k - i;
      res = 0;
      for(j=0; j<nDefine; j++){
        if( strncmp(azDefine[j],&z[i],n)==0 && azDefine[j][n]==0 ){
          res = 1;
          break;
        }
      }
      i = k-1;
      if( neg ){
        res = !res;
        neg = 0;
      }
      okTerm = 0;
      continue;
    }
    goto pp_syntax_error;
  }
  return res;

pp_syntax_error:
  if( lineno>0 ){
    fprintf(stderr, "%%if syntax error on line %d.\n", lineno);
    fprintf(stderr, "  %.*s <-- syntax error here\n", i+1, z);
    exit(1);
  }else{
    return -(i+1);
  }
}

/* Run the preprocessor over the input file text.  The global variables
** azDefine[0] through azDefine[nDefine-1] contains the names of all defined
** macros.  This routine looks for "%ifdef" and "%ifndef" and "%endif" and
** comments them out.  Text in between is also commented out as appropriate.
*/
static void preprocess_input(char *z){
  int i, j, k;
  int exclude = 0;
  int start = 0;
  int lineno = 1;
  int start_lineno = 1;
  for(i=0; z[i]; i++){
    if( z[i]=='\n' ) lineno++;
    if( z[i]!='%' || (i>0 && z[i-1]!='\n') ) continue;
    if( strncmp(&z[i],"%endif",6)==0 && ISSPACE(z[i+6]) ){
      if( exclude ){
        exclude--;
        if( exclude==0 ){
          for(j=start; j<i; j++) if( z[j]!='\n' ) z[j] = ' ';
        }
      }
      for(j=i; z[j] && z[j]!='\n'; j++) z[j] = ' ';
    }else if( strncmp(&z[i],"%else",5)==0 && ISSPACE(z[i+5]) ){
      if( exclude==1){
        exclude = 0;
        for(j=start; j<i; j++) if( z[j]!='\n' ) z[j] = ' ';
      }else if( exclude==0 ){
        exclude = 1;
        start = i;
        start_lineno = lineno;
      }
      for(j=i; z[j] && z[j]!='\n'; j++) z[j] = ' ';
    }else if( strncmp(&z[i],"%ifdef ",7)==0 
          || strncmp(&z[i],"%if ",4)==0
          || strncmp(&z[i],"%ifndef ",8)==0 ){
      if( exclude ){
        exclude++;
      }else{
        int isNot;
        int iBool;
        for(j=i; z[j] && !ISSPACE(z[j]); j++){}
        iBool = j;
        isNot = (j==i+7);
        while( z[j] && z[j]!='\n' ){ j++; }
        k = z[j];
        z[j] = 0;
        exclude = eval_preprocessor_boolean(&z[iBool], lineno);
        z[j] = k;
        if( !isNot ) exclude = !exclude;
        if( exclude ){
          start = i;
          start_lineno = lineno;
        }
      }
      for(j=i; z[j] && z[j]!='\n'; j++) z[j] = ' ';
    }
  }
  if( exclude ){
    fprintf(stderr,"unterminated %%ifdef starting on line %d\n", start_lineno);
    exit(1);
  }
}

/* In spite of its name, this function is really a scanner.  It read
** in the entire input file (all at once) then tokenizes it.  Each
** token is passed to the function "parseonetoken" which builds all
** the appropriate data structures in the global state vector "gp".
*/
void Parse(struct lemon *gp)
{
  struct pstate ps;
  FILE *fp;
  char *filebuf;
  unsigned int filesize;
  int lineno;
  int c;
  char *cp, *nextcp;
  int startline = 0;

  memset(&ps, '\0', sizeof(ps));
  ps.gp = gp;
  ps.filename = gp->filename;
  ps.errorcnt = 0;
  ps.state = INITIALIZE;

  /* Begin by reading the input file */
  fp = fopen(ps.filename,"rb");
  if( fp==0 ){
    ErrorMsg(ps.filename,0,"Can't open this file for reading.");
    gp->errorcnt++;
    return;
  }
  fseek(fp,0,2);
  filesize = ftell(fp);
  rewind(fp);
  filebuf = (char *)malloc( filesize+1 );
  if( filesize>100000000 || filebuf==0 ){
    ErrorMsg(ps.filename,0,"Input file too large.");
    free(filebuf);
    gp->errorcnt++;
    fclose(fp);
    return;
  }
  if( fread(filebuf,1,filesize,fp)!=filesize ){
    ErrorMsg(ps.filename,0,"Can't read in all %d bytes of this file.",
      filesize);
    free(filebuf);
    gp->errorcnt++;
    fclose(fp);
    return;
  }
  fclose(fp);
  filebuf[filesize] = 0;

  /* Make an initial pass through the file to handle %ifdef and %ifndef */
  preprocess_input(filebuf);
  if( gp->printPreprocessed ){
    printf("%s\n", filebuf);
    return;
  }

  /* Now scan the text of the input file */
  lineno = 1;
  for(cp=filebuf; (c= *cp)!=0; ){
    if( c=='\n' ) lineno++;              /* Keep track of the line number */
    if( ISSPACE(c) ){ cp++; continue; }  /* Skip all white space */
    if( c=='/' && cp[1]=='/' ){          /* Skip C++ style comments */
      cp+=2;
      while( (c= *cp)!=0 && c!='\n' ) cp++;
      continue;
    }
    if( c=='/' && cp[1]=='*' ){          /* Skip C style comments */
      cp+=2;
      if( (*cp)=='/' ) cp++;
      while( (c= *cp)!=0 && (c!='/' || cp[-1]!='*') ){
        if( c=='\n' ) lineno++;
        cp++;
      }
      if( c ) cp++;
      continue;
    }
    ps.tokenstart = cp;                /* Mark the beginning of the token */
    ps.tokenlineno = lineno;           /* Linenumber on which token begins */
    if( c=='\"' ){                     /* String literals */
      cp++;
      while( (c= *cp)!=0 && c!='\"' ){
        if( c=='\n' ) lineno++;
        cp++;
      }
      if( c==0 ){
        ErrorMsg(ps.filename,startline,
            "String starting on this line is not terminated before "
            "the end of the file.");
        ps.errorcnt++;
        nextcp = cp;
      }else{
        nextcp = cp+1;
      }
    }else if( c=='{' ){               /* A block of C code */
      int level;
      cp++;
      for(level=1; (c= *cp)!=0 && (level>1 || c!='}'); cp++){
        if( c=='\n' ) lineno++;
        else if( c=='{' ) level++;
        else if( c=='}' ) level--;
        else if( c=='/' && cp[1]=='*' ){  /* Skip comments */
          int prevc;
          cp = &cp[2];
          prevc = 0;
          while( (c= *cp)!=0 && (c!='/' || prevc!='*') ){
            if( c=='\n' ) lineno++;
            prevc = c;
            cp++;
          }
        }else if( c=='/' && cp[1]=='/' ){  /* Skip C++ style comments too */
          cp = &cp[2];
          while( (c= *cp)!=0 && c!='\n' ) cp++;
          if( c ) lineno++;
        }else if( c=='\'' || c=='\"' ){    /* String a character literals */
          int startchar, prevc;
          startchar = c;
          prevc = 0;
          for(cp++; (c= *cp)!=0 && (c!=startchar || prevc=='\\'); cp++){
            if( c=='\n' ) lineno++;
            if( prevc=='\\' ) prevc = 0;
            else              prevc = c;
          }
        }
      }
      if( c==0 ){
        ErrorMsg(ps.filename,ps.tokenlineno,
          "C code starting on this line is not terminated before "
          "the end of the file.");
        ps.errorcnt++;
        nextcp = cp;
      }else{
        nextcp = cp+1;
      }
    }else if( ISALNUM(c) ){          /* Identifiers */
      while( (c= *cp)!=0 && (ISALNUM(c) || c=='_') ) cp++;
      nextcp = cp;
    }else if( c==':' && cp[1]==':' && cp[2]=='=' ){ /* The operator "::=" */
      cp += 3;
      nextcp = cp;
    }else if( (c=='/' || c=='|') && ISALPHA(cp[1]) ){
      cp += 2;
      while( (c = *cp)!=0 && (ISALNUM(c) || c=='_') ) cp++;
      nextcp = cp;
    }else{                          /* All other (one character) operators */
      cp++;
      nextcp = cp;
    }
    c = *cp;
    *cp = 0;                        /* Null terminate the token */
    parseonetoken(&ps);             /* Parse the token */
    *cp = (char)c;                  /* Restore the buffer */
    cp = nextcp;
  }
  free(filebuf);                    /* Release the buffer after parsing */
  gp->rule = ps.firstrule;
  gp->errorcnt = ps.errorcnt;
}
/*************************** From the file "plink.c" *********************/
/*
** Routines processing configuration follow-set propagation links
** in the LEMON parser generator.
*/
static struct plink *plink_freelist = 0;

/* Allocate a new plink */
struct plink *Plink_new(void){
  struct plink *newlink;

  if( plink_freelist==0 ){
    int i;
    int amt = 100;
    plink_freelist = (struct plink *)calloc( amt, sizeof(struct plink) );
    if( plink_freelist==0 ){
      fprintf(stderr,
      "Unable to allocate memory for a new follow-set propagation link.\n");
      exit(1);
    }
    for(i=0; i<amt-1; i++) plink_freelist[i].next = &plink_freelist[i+1];
    plink_freelist[amt-1].next = 0;
  }
  newlink = plink_freelist;
  plink_freelist = plink_freelist->next;
  return newlink;
}

/* Add a plink to a plink list */
void Plink_add(struct plink **plpp, struct config *cfp)
{
  struct plink *newlink;
  newlink = Plink_new();
  newlink->next = *plpp;
  *plpp = newlink;
  newlink->cfp = cfp;
}

/* Transfer every plink on the list "from" to the list "to" */
void Plink_copy(struct plink **to, struct plink *from)
{
  struct plink *nextpl;
  while( from ){
    nextpl = from->next;
    from->next = *to;
    *to = from;
    from = nextpl;
  }
}

/* Delete every plink on the list */
void Plink_delete(struct plink *plp)
{
  struct plink *nextpl;

  while( plp ){
    nextpl = plp->next;
    plp->next = plink_freelist;
    plink_freelist = plp;
    plp = nextpl;
  }
}
/*********************** From the file "report.c" **************************/
/*
** Procedures for generating reports and tables in the LEMON parser generator.
*/

/* Generate a filename with the given suffix.  Space to hold the
** name comes from malloc() and must be freed by the calling
** function.
*/
PRIVATE char *file_makename(struct lemon *lemp, const char *suffix)
{
  char *name;
  char *cp;
  char *filename = lemp->filename;
  int sz;

  if( outputDir ){
    cp = strrchr(filename, '/');
    if( cp ) filename = cp + 1;
  }
  sz = lemonStrlen(filename);
  sz += lemonStrlen(suffix);
  if( outputDir ) sz += lemonStrlen(outputDir) + 1;
  sz += 5;
  name = (char*)malloc( sz );
  if( name==0 ){
    fprintf(stderr,"Can't allocate space for a filename.\n");
    exit(1);
  }
  name[0] = 0;
  if( outputDir ){
    lemon_strcpy(name, outputDir);
    lemon_strcat(name, "/");
  }
  lemon_strcat(name,filename);
  cp = strrchr(name,'.');
  if( cp ) *cp = 0;
  lemon_strcat(name,suffix);
  return name;
}

/* Open a file with a name based on the name of the input file,
** but with a different (specified) suffix, and return a pointer
** to the stream */
PRIVATE FILE *file_open(
  struct lemon *lemp,
  const char *suffix,
  const char *mode
){
  FILE *fp;

  if( lemp->outname ) free(lemp->outname);
  lemp->outname = file_makename(lemp, suffix);
  fp = fopen(lemp->outname,mode);
  if( fp==0 && *mode=='w' ){
    fprintf(stderr,"Can't open file \"%s\".\n",lemp->outname);
    lemp->errorcnt++;
    return 0;
  }
  return fp;
}

/* Print the text of a rule
*/
void rule_print(FILE *out, struct rule *rp){
  int i, j;
  fprintf(out, "%s",rp->lhs->name);
  /*    if( rp->lhsalias ) fprintf(out,"(%s)",rp->lhsalias); */
  fprintf(out," ::=");
  for(i=0; i<rp->nrhs; i++){
    struct symbol *sp = rp->rhs[i];
    if( sp->type==MULTITERMINAL ){
      fprintf(out," %s", sp->subsym[0]->name);
      for(j=1; j<sp->nsubsym; j++){
        fprintf(out,"|%s", sp->subsym[j]->name);
      }
    }else{
      fprintf(out," %s", sp->name);
    }
    /* if( rp->rhsalias[i] ) fprintf(out,"(%s)",rp->rhsalias[i]); */
  }
}

/* Duplicate the input file without comments and without actions
** on rules */
void Reprint(struct lemon *lemp)
{
  struct rule *rp;
  struct symbol *sp;
  int i, j, maxlen, len, ncolumns, skip;
  printf("// Reprint of input file \"%s\".\n// Symbols:\n",lemp->filename);
  maxlen = 10;
  for(i=0; i<lemp->nsymbol; i++){
    sp = lemp->symbols[i];
    len = lemonStrlen(sp->name);
    if( len>maxlen ) maxlen = len;
  }
  ncolumns = 76/(maxlen+5);
  if( ncolumns<1 ) ncolumns = 1;
  skip = (lemp->nsymbol + ncolumns - 1)/ncolumns;
  for(i=0; i<skip; i++){
    printf("//");
    for(j=i; j<lemp->nsymbol; j+=skip){
      sp = lemp->symbols[j];
      assert( sp->index==j );
      printf(" %3d %-*.*s",j,maxlen,maxlen,sp->name);
    }
    printf("\n");
  }
  for(rp=lemp->rule; rp; rp=rp->next){
    rule_print(stdout, rp);
    printf(".");
    if( rp->precsym ) printf(" [%s]",rp->precsym->name);
    /* if( rp->code ) printf("\n    %s",rp->code); */
    printf("\n");
  }
}

/* Print a single rule.
*/
void RulePrint(FILE *fp, struct rule *rp, int iCursor){
  struct symbol *sp;
  int i, j;
  fprintf(fp,"%s ::=",rp->lhs->name);
  for(i=0; i<=rp->nrhs; i++){
    if( i==iCursor ) fprintf(fp," *");
    if( i==rp->nrhs ) break;
    sp = rp->rhs[i];
    if( sp->type==MULTITERMINAL ){
      fprintf(fp," %s", sp->subsym[0]->name);
      for(j=1; j<sp->nsubsym; j++){
        fprintf(fp,"|%s",sp->subsym[j]->name);
      }
    }else{
      fprintf(fp," %s", sp->name);
    }
  }
}

/* Print the rule for a configuration.
*/
void ConfigPrint(FILE *fp, struct config *cfp){
  RulePrint(fp, cfp->rp, cfp->dot);
}

/* #define TEST */
#if 0
/* Print a set */
PRIVATE void SetPrint(out,set,lemp)
FILE *out;
char *set;
struct lemon *lemp;
{
  int i;
  char *spacer;
  spacer = "";
  fprintf(out,"%12s[","");
  for(i=0; i<lemp->nterminal; i++){
    if( SetFind(set,i) ){
      fprintf(out,"%s%s",spacer,lemp->symbols[i]->name);
      spacer = " ";
    }
  }
  fprintf(out,"]\n");
}

/* Print a plink chain */
PRIVATE void PlinkPrint(out,plp,tag)
FILE *out;
struct plink *plp;
char *tag;
{
  while( plp ){
    fprintf(out,"%12s%s (state %2d) ","",tag,plp->cfp->stp->statenum);
    ConfigPrint(out,plp->cfp);
    fprintf(out,"\n");
    plp = plp->next;
  }
}
#endif

/* Print an action to the given file descriptor.  Return FALSE if
** nothing was actually printed.
*/
int PrintAction(
  struct action *ap,          /* The action to print */
  FILE *fp,                   /* Print the action here */
  int indent                  /* Indent by this amount */
){
  int result = 1;
  switch( ap->type ){
    case SHIFT: {
      struct state *stp = ap->x.stp;
      fprintf(fp,"%*s shift        %-7d",indent,ap->sp->name,stp->statenum);
      break;
    }
    case REDUCE: {
      struct rule *rp = ap->x.rp;
      fprintf(fp,"%*s reduce       %-7d",indent,ap->sp->name,rp->iRule);
      RulePrint(fp, rp, -1);
      break;
    }
    case SHIFTREDUCE: {
      struct rule *rp = ap->x.rp;
      fprintf(fp,"%*s shift-reduce %-7d",indent,ap->sp->name,rp->iRule);
      RulePrint(fp, rp, -1);
      break;
    }
    case ACCEPT:
      fprintf(fp,"%*s accept",indent,ap->sp->name);
      break;
    case ERROR:
      fprintf(fp,"%*s error",indent,ap->sp->name);
      break;
    case SRCONFLICT:
    case RRCONFLICT:
      fprintf(fp,"%*s reduce       %-7d ** Parsing conflict **",
        indent,ap->sp->name,ap->x.rp->iRule);
      break;
    case SSCONFLICT:
      fprintf(fp,"%*s shift        %-7d ** Parsing conflict **",
        indent,ap->sp->name,ap->x.stp->statenum);
      break;
    case SH_RESOLVED:
      if( showPrecedenceConflict ){
        fprintf(fp,"%*s shift        %-7d -- dropped by precedence",
                indent,ap->sp->name,ap->x.stp->statenum);
      }else{
        result = 0;
      }
      break;
    case RD_RESOLVED:
      if( showPrecedenceConflict ){
        fprintf(fp,"%*s reduce %-7d -- dropped by precedence",
                indent,ap->sp->name,ap->x.rp->iRule);
      }else{
        result = 0;
      }
      break;
    case NOT_USED:
      result = 0;
      break;
  }
  if( result && ap->spOpt ){
    fprintf(fp,"  /* because %s==%s */", ap->sp->name, ap->spOpt->name);
  }
  return result;
}

/* Generate the "*.out" log file */
void ReportOutput(struct lemon *lemp)
{
  int i, n;
  struct state *stp;
  struct config *cfp;
  struct action *ap;
  struct rule *rp;
  FILE *fp;

  fp = file_open(lemp,".out","wb");
  if( fp==0 ) return;
  for(i=0; i<lemp->nxstate; i++){
    stp = lemp->sorted[i];
    fprintf(fp,"State %d:\n",stp->statenum);
    if( lemp->basisflag ) cfp=stp->bp;
    else                  cfp=stp->cfp;
    while( cfp ){
      char buf[20];
      if( cfp->dot==cfp->rp->nrhs ){
        lemon_sprintf(buf,"(%d)",cfp->rp->iRule);
        fprintf(fp,"    %5s ",buf);
      }else{
        fprintf(fp,"          ");
      }
      ConfigPrint(fp,cfp);
      fprintf(fp,"\n");
#if 0
      SetPrint(fp,cfp->fws,lemp);
      PlinkPrint(fp,cfp->fplp,"To  ");
      PlinkPrint(fp,cfp->bplp,"From");
#endif
      if( lemp->basisflag ) cfp=cfp->bp;
      else                  cfp=cfp->next;
    }
    fprintf(fp,"\n");
    for(ap=stp->ap; ap; ap=ap->next){
      if( PrintAction(ap,fp,30) ) fprintf(fp,"\n");
    }
    fprintf(fp,"\n");
  }
  fprintf(fp, "----------------------------------------------------\n");
  fprintf(fp, "Symbols:\n");
  fprintf(fp, "The first-set of non-terminals is shown after the name.\n\n");
  for(i=0; i<lemp->nsymbol; i++){
    int j;
    struct symbol *sp;

    sp = lemp->symbols[i];
    fprintf(fp, "  %3d: %s", i, sp->name);
    if( sp->type==NONTERMINAL ){
      fprintf(fp, ":");
      if( sp->lambda ){
        fprintf(fp, " <lambda>");
      }
      for(j=0; j<lemp->nterminal; j++){
        if( sp->firstset && SetFind(sp->firstset, j) ){
          fprintf(fp, " %s", lemp->symbols[j]->name);
        }
      }
    }
    if( sp->prec>=0 ) fprintf(fp," (precedence=%d)", sp->prec);
    fprintf(fp, "\n");
  }
  fprintf(fp, "----------------------------------------------------\n");
  fprintf(fp, "Syntax-only Symbols:\n");
  fprintf(fp, "The following symbols never carry semantic content.\n\n");
  for(i=n=0; i<lemp->nsymbol; i++){
    int w;
    struct symbol *sp = lemp->symbols[i];
    if( sp->bContent ) continue;
    w = (int)strlen(sp->name);
    if( n>0 && n+w>75 ){
      fprintf(fp,"\n");
      n = 0;
    }
    if( n>0 ){
      fprintf(fp, " ");
      n++;
    }
    fprintf(fp, "%s", sp->name);
    n += w;
  }
  if( n>0 ) fprintf(fp, "\n");
  fprintf(fp, "----------------------------------------------------\n");
  fprintf(fp, "Rules:\n");
  for(rp=lemp->rule; rp; rp=rp->next){
    fprintf(fp, "%4d: ", rp->iRule);
    rule_print(fp, rp);
    fprintf(fp,".");
    if( rp->precsym ){
      fprintf(fp," [%s precedence=%d]",
              rp->precsym->name, rp->precsym->prec);
    }
    fprintf(fp,"\n");
  }
  fclose(fp);
  return;
}

/* Search for the file "name" which is in the same directory as
** the executable */
PRIVATE char *pathsearch(char *argv0, char *name, int modemask)
{
  const char *pathlist;
  char *pathbufptr = 0;
  char *pathbuf = 0;
  char *path,*cp;
  char c;

#ifdef __WIN32__
  cp = strrchr(argv0,'\\');
#else
  cp = strrchr(argv0,'/');
#endif
  if( cp ){
    c = *cp;
    *cp = 0;
    path = (char *)malloc( lemonStrlen(argv0) + lemonStrlen(name) + 2 );
    if( path ) lemon_sprintf(path,"%s/%s",argv0,name);
    *cp = c;
  }else{
    pathlist = getenv("PATH");
    if( pathlist==0 ) pathlist = ".:/bin:/usr/bin";
    pathbuf = (char *) malloc( lemonStrlen(pathlist) + 1 );
    path = (char *)malloc( lemonStrlen(pathlist)+lemonStrlen(name)+2 );
    if( (pathbuf != 0) && (path!=0) ){
      pathbufptr = pathbuf;
      lemon_strcpy(pathbuf, pathlist);
      while( *pathbuf ){
        cp = strchr(pathbuf,':');
        if( cp==0 ) cp = &pathbuf[lemonStrlen(pathbuf)];
        c = *cp;
        *cp = 0;
        lemon_sprintf(path,"%s/%s",pathbuf,name);
        *cp = c;
        if( c==0 ) pathbuf[0] = 0;
        else pathbuf = &cp[1];
        if( access(path,modemask)==0 ) break;
      }
    }
    free(pathbufptr);
  }
  return path;
}

/* Given an action, compute the integer value for that action
** which is to be put in the action table of the generated machine.
** Return negative if no action should be generated.
*/
PRIVATE int compute_action(struct lemon *lemp, struct action *ap)
{
  int act;
  switch( ap->type ){
    case SHIFT:  act = ap->x.stp->statenum;                        break;
    case SHIFTREDUCE: {
      /* Since a SHIFT is inherient after a prior REDUCE, convert any
      ** SHIFTREDUCE action with a nonterminal on the LHS into a simple
      ** REDUCE action: */
      if( ap->sp->index>=lemp->nterminal
       && (lemp->errsym==0 || ap->sp->index!=lemp->errsym->index)
      ){
        act = lemp->minReduce + ap->x.rp->iRule;
      }else{
        act = lemp->minShiftReduce + ap->x.rp->iRule;
      }
      break;
    }
    case REDUCE: act = lemp->minReduce + ap->x.rp->iRule;          break;
    case ERROR:  act = lemp->errAction;                            break;
    case ACCEPT: act = lemp->accAction;                            break;
    default:     act = -1; break;
  }
  return act;
}

#define LINESIZE 1000
/* The next cluster of routines are for reading the template file
** and writing the results to the generated parser */
/* The first function transfers data from "in" to "out" until
** a line is seen which begins with "%%".  The line number is
** tracked.
**
** if name!=0, then any word that begin with "Parse" is changed to
** begin with *name instead.
*/
PRIVATE void tplt_xfer(char *name, FILE *in, FILE *out, int *lineno)
{
  int i, iStart;
  char line[LINESIZE];
  while( fgets(line,LINESIZE,in) && (line[0]!='%' || line[1]!='%') ){
    (*lineno)++;
    iStart = 0;
    if( name ){
      for(i=0; line[i]; i++){
        if( line[i]=='P' && strncmp(&line[i],"Parse",5)==0
          && (i==0 || !ISALPHA(line[i-1]))
        ){
          if( i>iStart ) fprintf(out,"%.*s",i-iStart,&line[iStart]);
          fprintf(out,"%s",name);
          i += 4;
          iStart = i+1;
        }
      }
    }
    fprintf(out,"%s",&line[iStart]);
  }
}

/* Skip forward past the header of the template file to the first "%%"
*/
PRIVATE void tplt_skip_header(FILE *in, int *lineno)
{
  char line[LINESIZE];
  while( fgets(line,LINESIZE,in) && (line[0]!='%' || line[1]!='%') ){
    (*lineno)++;
  }
}

/* The next function finds the template file and opens it, returning
** a pointer to the opened file. */
PRIVATE FILE *tplt_open(struct lemon *lemp)
{
  static char templatename[] = "lempar.c";
  char buf[1000];
  FILE *in;
  char *tpltname;
  char *toFree = 0;
  char *cp;

  /* first, see if user specified a template filename on the command line. */
  if (user_templatename != 0) {
    if( access(user_templatename,004)==-1 ){
      fprintf(stderr,"Can't find the parser driver template file \"%s\".\n",
        user_templatename);
      lemp->errorcnt++;
      return 0;
    }
    in = fopen(user_templatename,"rb");
    if( in==0 ){
      fprintf(stderr,"Can't open the template file \"%s\".\n",
              user_templatename);
      lemp->errorcnt++;
      return 0;
    }
    return in;
  }

  cp = strrchr(lemp->filename,'.');
  if( cp ){
    lemon_sprintf(buf,"%.*s.lt",(int)(cp-lemp->filename),lemp->filename);
  }else{
    lemon_sprintf(buf,"%s.lt",lemp->filename);
  }
  if( access(buf,004)==0 ){
    tpltname = buf;
  }else if( access(templatename,004)==0 ){
    tpltname = templatename;
  }else{
    toFree = tpltname = pathsearch(lemp->argv0,templatename,0);
  }
  if( tpltname==0 ){
    fprintf(stderr,"Can't find the parser driver template file \"%s\".\n",
    templatename);
    lemp->errorcnt++;
    return 0;
  }
  in = fopen(tpltname,"rb");
  if( in==0 ){
    fprintf(stderr,"Can't open the template file \"%s\".\n",tpltname);
    lemp->errorcnt++;
  }
  free(toFree);
  return in;
}

/* Print a #line directive line to the output file. */
PRIVATE void tplt_linedir(FILE *out, int lineno, char *filename)
{
  fprintf(out,"#line %d \"",lineno);
  while( *filename ){
    if( *filename == '\\' ) putc('\\',out);
    putc(*filename,out);
    filename++;
  }
  fprintf(out,"\"\n");
}

/* Print a string to the file and keep the linenumber up to date */
PRIVATE void tplt_print(FILE *out, struct lemon *lemp, char *str, int *lineno)
{
  if( str==0 ) return;
  while( *str ){
    putc(*str,out);
    if( *str=='\n' ) (*lineno)++;
    str++;
  }
  if( str[-1]!='\n' ){
    putc('\n',out);
    (*lineno)++;
  }
  if (!lemp->nolinenosflag) {
    (*lineno)++; tplt_linedir(out,*lineno,lemp->outname);
  }
  return;
}

/*
** The following routine emits code for the destructor for the
** symbol sp
*/
void emit_destructor_code(
  FILE *out,
  struct symbol *sp,
  struct lemon *lemp,
  int *lineno
){
 char *cp = 0;

 if( sp->type==TERMINAL ){
   cp = lemp->tokendest;
   if( cp==0 ) return;
   fprintf(out,"{\n"); (*lineno)++;
 }else if( sp->destructor ){
   cp = sp->destructor;
   fprintf(out,"{\n"); (*lineno)++;
   if( !lemp->nolinenosflag ){
     (*lineno)++;
     tplt_linedir(out,sp->destLineno,lemp->filename);
   }
 }else if( lemp->vardest ){
   cp = lemp->vardest;
   if( cp==0 ) return;
   fprintf(out,"{\n"); (*lineno)++;
 }else{
   assert( 0 );  /* Cannot happen */
 }
 for(; *cp; cp++){
   if( *cp=='$' && cp[1]=='$' ){
     fprintf(out,"(yypminor->yy%d)",sp->dtnum);
     cp++;
     continue;
   }
   if( *cp=='\n' ) (*lineno)++;
   fputc(*cp,out);
 }
 fprintf(out,"\n"); (*lineno)++;
 if (!lemp->nolinenosflag) {
   (*lineno)++; tplt_linedir(out,*lineno,lemp->outname);
 }
 fprintf(out,"}\n"); (*lineno)++;
 return;
}

/*
** Return TRUE (non-zero) if the given symbol has a destructor.
*/
int has_destructor(struct symbol *sp, struct lemon *lemp)
{
  int ret;
  if( sp->type==TERMINAL ){
    ret = lemp->tokendest!=0;
  }else{
    ret = lemp->vardest!=0 || sp->destructor!=0;
  }
  return ret;
}

/*
** Append text to a dynamically allocated string.  If zText is 0 then
** reset the string to be empty again.  Always return the complete text
** of the string (which is overwritten with each call).
**
** n bytes of zText are stored.  If n==0 then all of zText up to the first
** \000 terminator is stored.  zText can contain up to two instances of
** %d.  The values of p1 and p2 are written into the first and second
** %d.
**
** If n==-1, then the previous character is overwritten.
*/
PRIVATE char *append_str(const char *zText, int n, int p1, int p2){
  static char empty[1] = { 0 };
  static char *z = 0;
  static int alloced = 0;
  static int used = 0;
  int c;
  char zInt[40];
  if( zText==0 ){
    if( used==0 && z!=0 ) z[0] = 0;
    used = 0;
    return z;
  }
  if( n<=0 ){
    if( n<0 ){
      used += n;
      assert( used>=0 );
    }
    n = lemonStrlen(zText);
  }
  if( (int) (n+sizeof(zInt)*2+used) >= alloced ){
    alloced = n + sizeof(zInt)*2 + used + 200;
    z = (char *) realloc(z,  alloced);
  }
  if( z==0 ) return empty;
  while( n-- > 0 ){
    c = *(zText++);
    if( c=='%' && n>0 && zText[0]=='d' ){
      lemon_sprintf(zInt, "%d", p1);
      p1 = p2;
      lemon_strcpy(&z[used], zInt);
      used += lemonStrlen(&z[used]);
      zText++;
      n--;
    }else{
      z[used++] = (char)c;
    }
  }
  z[used] = 0;
  return z;
}

/*
** Write and transform the rp->code string so that symbols are expanded.
** Populate the rp->codePrefix and rp->codeSuffix strings, as appropriate.
**
** Return 1 if the expanded code requires that "yylhsminor" local variable
** to be defined.
*/
PRIVATE int translate_code(struct lemon *lemp, struct rule *rp){
  char *cp, *xp;
  int i;
  int rc = 0;            /* True if yylhsminor is used */
  int dontUseRhs0 = 0;   /* If true, use of left-most RHS label is illegal */
  const char *zSkip = 0; /* The zOvwrt comment within rp->code, or NULL */
  char lhsused = 0;      /* True if the LHS element has been used */
  char lhsdirect;        /* True if LHS writes directly into stack */
  char used[MAXRHS];     /* True for each RHS element which is used */
  char zLhs[50];         /* Convert the LHS symbol into this string */
  char zOvwrt[900];      /* Comment that to allow LHS to overwrite RHS */

  for(i=0; i<rp->nrhs; i++) used[i] = 0;
  lhsused = 0;

  if( rp->code==0 ){
    static char newlinestr[2] = { '\n', '\0' };
    rp->code = newlinestr;
    rp->line = rp->ruleline;
    rp->noCode = 1;
  }else{
    rp->noCode = 0;
  }


  if( rp->nrhs==0 ){
    /* If there are no RHS symbols, then writing directly to the LHS is ok */
    lhsdirect = 1;
  }else if( rp->rhsalias[0]==0 ){
    /* The left-most RHS symbol has no value.  LHS direct is ok.  But
    ** we have to call the destructor on the RHS symbol first. */
    lhsdirect = 1;
    if( has_destructor(rp->rhs[0],lemp) ){
      append_str(0,0,0,0);
      append_str("  yy_destructor(yypParser,%d,&yymsp[%d].minor);\n", 0,
                 rp->rhs[0]->index,1-rp->nrhs);
      rp->codePrefix = Strsafe(append_str(0,0,0,0));
      rp->noCode = 0;
    }
  }else if( rp->lhsalias==0 ){
    /* There is no LHS value symbol. */
    lhsdirect = 1;
  }else if( strcmp(rp->lhsalias,rp->rhsalias[0])==0 ){
    /* The LHS symbol and the left-most RHS symbol are the same, so
    ** direct writing is allowed */
    lhsdirect = 1;
    lhsused = 1;
    used[0] = 1;
    if( rp->lhs->dtnum!=rp->rhs[0]->dtnum ){
      ErrorMsg(lemp->filename,rp->ruleline,
        "%s(%s) and %s(%s) share the same label but have "
        "different datatypes.",
        rp->lhs->name, rp->lhsalias, rp->rhs[0]->name, rp->rhsalias[0]);
      lemp->errorcnt++;
    }
  }else{
    lemon_sprintf(zOvwrt, "/*%s-overwrites-%s*/",
                  rp->lhsalias, rp->rhsalias[0]);
    zSkip = strstr(rp->code, zOvwrt);
    if( zSkip!=0 ){
      /* The code contains a special comment that indicates that it is safe
      ** for the LHS label to overwrite left-most RHS label. */
      lhsdirect = 1;
    }else{
      lhsdirect = 0;
    }
  }
  if( lhsdirect ){
    sprintf(zLhs, "yymsp[%d].minor.yy%d",1-rp->nrhs,rp->lhs->dtnum);
  }else{
    rc = 1;
    sprintf(zLhs, "yylhsminor.yy%d",rp->lhs->dtnum);
  }

  append_str(0,0,0,0);

  /* This const cast is wrong but harmless, if we're careful. */
  for(cp=(char *)rp->code; *cp; cp++){
    if( cp==zSkip ){
      append_str(zOvwrt,0,0,0);
      cp += lemonStrlen(zOvwrt)-1;
      dontUseRhs0 = 1;
      continue;
    }
    if( ISALPHA(*cp) && (cp==rp->code || (!ISALNUM(cp[-1]) && cp[-1]!='_')) ){
      char saved;
      for(xp= &cp[1]; ISALNUM(*xp) || *xp=='_'; xp++);
      saved = *xp;
      *xp = 0;
      if( rp->lhsalias && strcmp(cp,rp->lhsalias)==0 ){
        append_str(zLhs,0,0,0);
        cp = xp;
        lhsused = 1;
      }else{
        for(i=0; i<rp->nrhs; i++){
          if( rp->rhsalias[i] && strcmp(cp,rp->rhsalias[i])==0 ){
            if( i==0 && dontUseRhs0 ){
              ErrorMsg(lemp->filename,rp->ruleline,
                 "Label %s used after '%s'.",
                 rp->rhsalias[0], zOvwrt);
              lemp->errorcnt++;
            }else if( cp!=rp->code && cp[-1]=='@' ){
              /* If the argument is of the form @X then substituted
              ** the token number of X, not the value of X */
              append_str("yymsp[%d].major",-1,i-rp->nrhs+1,0);
            }else{
              struct symbol *sp = rp->rhs[i];
              int dtnum;
              if( sp->type==MULTITERMINAL ){
                dtnum = sp->subsym[0]->dtnum;
              }else{
                dtnum = sp->dtnum;
              }
              append_str("yymsp[%d].minor.yy%d",0,i-rp->nrhs+1, dtnum);
            }
            cp = xp;
            used[i] = 1;
            break;
          }
        }
      }
      *xp = saved;
    }
    append_str(cp, 1, 0, 0);
  } /* End loop */

  /* Main code generation completed */
  cp = append_str(0,0,0,0);
  if( cp && cp[0] ) rp->code = Strsafe(cp);
  append_str(0,0,0,0);

  /* Check to make sure the LHS has been used */
  if( rp->lhsalias && !lhsused ){
    ErrorMsg(lemp->filename,rp->ruleline,
      "Label \"%s\" for \"%s(%s)\" is never used.",
        rp->lhsalias,rp->lhs->name,rp->lhsalias);
    lemp->errorcnt++;
  }

  /* Generate destructor code for RHS minor values which are not referenced.
  ** Generate error messages for unused labels and duplicate labels.
  */
  for(i=0; i<rp->nrhs; i++){
    if( rp->rhsalias[i] ){
      if( i>0 ){
        int j;
        if( rp->lhsalias && strcmp(rp->lhsalias,rp->rhsalias[i])==0 ){
          ErrorMsg(lemp->filename,rp->ruleline,
            "%s(%s) has the same label as the LHS but is not the left-most "
            "symbol on the RHS.",
            rp->rhs[i]->name, rp->rhsalias[i]);
          lemp->errorcnt++;
        }
        for(j=0; j<i; j++){
          if( rp->rhsalias[j] && strcmp(rp->rhsalias[j],rp->rhsalias[i])==0 ){
            ErrorMsg(lemp->filename,rp->ruleline,
              "Label %s used for multiple symbols on the RHS of a rule.",
              rp->rhsalias[i]);
            lemp->errorcnt++;
            break;
          }
        }
      }
      if( !used[i] ){
        ErrorMsg(lemp->filename,rp->ruleline,
          "Label %s for \"%s(%s)\" is never used.",
          rp->rhsalias[i],rp->rhs[i]->name,rp->rhsalias[i]);
        lemp->errorcnt++;
      }
    }else if( i>0 && has_destructor(rp->rhs[i],lemp) ){
      append_str("  yy_destructor(yypParser,%d,&yymsp[%d].minor);\n", 0,
         rp->rhs[i]->index,i-rp->nrhs+1);
    }
  }

  /* If unable to write LHS values directly into the stack, write the
  ** saved LHS value now. */
  if( lhsdirect==0 ){
    append_str("  yymsp[%d].minor.yy%d = ", 0, 1-rp->nrhs, rp->lhs->dtnum);
    append_str(zLhs, 0, 0, 0);
    append_str(";\n", 0, 0, 0);
  }

  /* Suffix code generation complete */
  cp = append_str(0,0,0,0);
  if( cp && cp[0] ){
    rp->codeSuffix = Strsafe(cp);
    rp->noCode = 0;
  }

  return rc;
}

/*
** Generate code which executes when the rule "rp" is reduced.  Write
** the code to "out".  Make sure lineno stays up-to-date.
*/
PRIVATE void emit_code(
  FILE *out,
  struct rule *rp,
  struct lemon *lemp,
  int *lineno
){
 const char *cp;

 /* Setup code prior to the #line directive */
 if( rp->codePrefix && rp->codePrefix[0] ){
   fprintf(out, "{%s", rp->codePrefix);
   for(cp=rp->codePrefix; *cp; cp++){ if( *cp=='\n' ) (*lineno)++; }
 }

 /* Generate code to do the reduce action */
 if( rp->code ){
   if( !lemp->nolinenosflag ){
     (*lineno)++;
     tplt_linedir(out,rp->line,lemp->filename);
   }
   fprintf(out,"{%s",rp->code);
   for(cp=rp->code; *cp; cp++){ if( *cp=='\n' ) (*lineno)++; }
   fprintf(out,"}\n"); (*lineno)++;
   if( !lemp->nolinenosflag ){
     (*lineno)++;
     tplt_linedir(out,*lineno,lemp->outname);
   }
 }

 /* Generate breakdown code that occurs after the #line directive */
 if( rp->codeSuffix && rp->codeSuffix[0] ){
   fprintf(out, "%s", rp->codeSuffix);
   for(cp=rp->codeSuffix; *cp; cp++){ if( *cp=='\n' ) (*lineno)++; }
 }

 if( rp->codePrefix ){
   fprintf(out, "}\n"); (*lineno)++;
 }

 return;
}

/*
** Print the definition of the union used for the parser's data stack.
** This union contains fields for every possible data type for tokens
** and nonterminals.  In the process of computing and printing this
** union, also set the ".dtnum" field of every terminal and nonterminal
** symbol.
*/
void print_stack_union(
  FILE *out,                  /* The output stream */
  struct lemon *lemp,         /* The main info structure for this parser */
  int *plineno,               /* Pointer to the line number */
  int mhflag                  /* True if generating makeheaders output */
){
  int lineno;               /* The line number of the output */
  char **types;             /* A hash table of datatypes */
  int arraysize;            /* Size of the "types" array */
  int maxdtlength;          /* Maximum length of any ".datatype" field. */
  char *stddt;              /* Standardized name for a datatype */
  int i,j;                  /* Loop counters */
  unsigned hash;            /* For hashing the name of a type */
  const char *name;         /* Name of the parser */

  /* Allocate and initialize types[] and allocate stddt[] */
  arraysize = lemp->nsymbol * 2;
  types = (char**)calloc( arraysize, sizeof(char*) );
  if( types==0 ){
    fprintf(stderr,"Out of memory.\n");
    exit(1);
  }
  for(i=0; i<arraysize; i++) types[i] = 0;
  maxdtlength = 0;
  if( lemp->vartype ){
    maxdtlength = lemonStrlen(lemp->vartype);
  }
  for(i=0; i<lemp->nsymbol; i++){
    int len;
    struct symbol *sp = lemp->symbols[i];
    if( sp->datatype==0 ) continue;
    len = lemonStrlen(sp->datatype);
    if( len>maxdtlength ) maxdtlength = len;
  }
  stddt = (char*)malloc( maxdtlength*2 + 1 );
  if( stddt==0 ){
    fprintf(stderr,"Out of memory.\n");
    exit(1);
  }

  /* Build a hash table of datatypes. The ".dtnum" field of each symbol
  ** is filled in with the hash index plus 1.  A ".dtnum" value of 0 is
  ** used for terminal symbols.  If there is no %default_type defined then
  ** 0 is also used as the .dtnum value for nonterminals which do not specify
  ** a datatype using the %type directive.
  */
  for(i=0; i<lemp->nsymbol; i++){
    struct symbol *sp = lemp->symbols[i];
    char *cp;
    if( sp==lemp->errsym ){
      sp->dtnum = arraysize+1;
      continue;
    }
    if( sp->type!=NONTERMINAL || (sp->datatype==0 && lemp->vartype==0) ){
      sp->dtnum = 0;
      continue;
    }
    cp = sp->datatype;
    if( cp==0 ) cp = lemp->vartype;
    j = 0;
    while( ISSPACE(*cp) ) cp++;
    while( *cp ) stddt[j++] = *cp++;
    while( j>0 && ISSPACE(stddt[j-1]) ) j--;
    stddt[j] = 0;
    if( lemp->tokentype && strcmp(stddt, lemp->tokentype)==0 ){
      sp->dtnum = 0;
      continue;
    }
    hash = 0;
    for(j=0; stddt[j]; j++){
      hash = hash*53 + stddt[j];
    }
    hash = (hash & 0x7fffffff)%arraysize;
    while( types[hash] ){
      if( strcmp(types[hash],stddt)==0 ){
        sp->dtnum = hash + 1;
        break;
      }
      hash++;
      if( hash>=(unsigned)arraysize ) hash = 0;
    }
    if( types[hash]==0 ){
      sp->dtnum = hash + 1;
      types[hash] = (char*)malloc( lemonStrlen(stddt)+1 );
      if( types[hash]==0 ){
        fprintf(stderr,"Out of memory.\n");
        exit(1);
      }
      lemon_strcpy(types[hash],stddt);
    }
  }

  /* Print out the definition of YYTOKENTYPE and YYMINORTYPE */
  name = lemp->name ? lemp->name : "Parse";
  lineno = *plineno;
  if( mhflag ){ fprintf(out,"#if INTERFACE\n"); lineno++; }
  fprintf(out,"#define %sTOKENTYPE %s\n",name,
    lemp->tokentype?lemp->tokentype:"void*");  lineno++;
  if( mhflag ){ fprintf(out,"#endif\n"); lineno++; }
  fprintf(out,"typedef union {\n"); lineno++;
  fprintf(out,"  int yyinit;\n"); lineno++;
  fprintf(out,"  %sTOKENTYPE yy0;\n",name); lineno++;
  for(i=0; i<arraysize; i++){
    if( types[i]==0 ) continue;
    fprintf(out,"  %s yy%d;\n",types[i],i+1); lineno++;
    free(types[i]);
  }
  if( lemp->errsym && lemp->errsym->useCnt ){
    fprintf(out,"  int yy%d;\n",lemp->errsym->dtnum); lineno++;
  }
  free(stddt);
  free(types);
  fprintf(out,"} YYMINORTYPE;\n"); lineno++;
  *plineno = lineno;
}

/*
** Return the name of a C datatype able to represent values between
** lwr and upr, inclusive.  If pnByte!=NULL then also write the sizeof
** for that type (1, 2, or 4) into *pnByte.
*/
static const char *minimum_size_type(int lwr, int upr, int *pnByte){
  const char *zType = "int";
  int nByte = 4;
  if( lwr>=0 ){
    if( upr<=255 ){
      zType = "unsigned char";
      nByte = 1;
    }else if( upr<65535 ){
      zType = "unsigned short int";
      nByte = 2;
    }else{
      zType = "unsigned int";
      nByte = 4;
    }
  }else if( lwr>=-127 && upr<=127 ){
    zType = "signed char";
    nByte = 1;
  }else if( lwr>=-32767 && upr<32767 ){
    zType = "short";
    nByte = 2;
  }
  if( pnByte ) *pnByte = nByte;
  return zType;
}

/*
** Each state contains a set of token transaction and a set of
** nonterminal transactions.  Each of these sets makes an instance
** of the following structure.  An array of these structures is used
** to order the creation of entries in the yy_action[] table.
*/
struct axset {
  struct state *stp;   /* A pointer to a state */
  int isTkn;           /* True to use tokens.  False for non-terminals */
  int nAction;         /* Number of actions */
  int iOrder;          /* Original order of action sets */
};

/*
** Compare to axset structures for sorting purposes
*/
static int axset_compare(const void *a, const void *b){
  struct axset *p1 = (struct axset*)a;
  struct axset *p2 = (struct axset*)b;
  int c;
  c = p2->nAction - p1->nAction;
  if( c==0 ){
    c = p1->iOrder - p2->iOrder;
  }
  assert( c!=0 || p1==p2 );
  return c;
}

/*
** Write text on "out" that describes the rule "rp".
*/
static void writeRuleText(FILE *out, struct rule *rp){
  int j;
  fprintf(out,"%s ::=", rp->lhs->name);
  for(j=0; j<rp->nrhs; j++){
    struct symbol *sp = rp->rhs[j];
    if( sp->type!=MULTITERMINAL ){
      fprintf(out," %s", sp->name);
    }else{
      int k;
      fprintf(out," %s", sp->subsym[0]->name);
      for(k=1; k<sp->nsubsym; k++){
        fprintf(out,"|%s",sp->subsym[k]->name);
      }
    }
  }
}


/* Generate C source code for the parser */
void ReportTable(
  struct lemon *lemp,
  int mhflag,     /* Output in makeheaders format if true */
  int sqlFlag     /* Generate the *.sql file too */
){
  FILE *out, *in, *sql;
  int  lineno;
  struct state *stp;
  struct action *ap;
  struct rule *rp;
  struct acttab *pActtab;
  int i, j, n, sz;
  int nLookAhead;
  int szActionType;     /* sizeof(YYACTIONTYPE) */
  int szCodeType;       /* sizeof(YYCODETYPE)   */
  const char *name;
  int mnTknOfst, mxTknOfst;
  int mnNtOfst, mxNtOfst;
  struct axset *ax;
  char *prefix;

  lemp->minShiftReduce = lemp->nstate;
  lemp->errAction = lemp->minShiftReduce + lemp->nrule;
  lemp->accAction = lemp->errAction + 1;
  lemp->noAction = lemp->accAction + 1;
  lemp->minReduce = lemp->noAction + 1;
  lemp->maxAction = lemp->minReduce + lemp->nrule;

  in = tplt_open(lemp);
  if( in==0 ) return;
  out = file_open(lemp,".c","wb");
  if( out==0 ){
    fclose(in);
    return;
  }
  if( sqlFlag==0 ){
    sql = 0;
  }else{
    sql = file_open(lemp, ".sql", "wb");
    if( sql==0 ){
      fclose(in);
      fclose(out);
      return;
    }
    fprintf(sql,
       "BEGIN;\n"
       "CREATE TABLE symbol(\n"
       "  id INTEGER PRIMARY KEY,\n"
       "  name TEXT NOT NULL,\n"
       "  isTerminal BOOLEAN NOT NULL,\n"
       "  fallback INTEGER REFERENCES symbol"
               " DEFERRABLE INITIALLY DEFERRED\n"
       ");\n"
    );
    for(i=0; i<lemp->nsymbol; i++){
      fprintf(sql,
         "INSERT INTO symbol(id,name,isTerminal,fallback)"
         "VALUES(%d,'%s',%s",
         i, lemp->symbols[i]->name,
         i<lemp->nterminal ? "TRUE" : "FALSE"
      );
      if( lemp->symbols[i]->fallback ){
        fprintf(sql, ",%d);\n", lemp->symbols[i]->fallback->index);
      }else{
        fprintf(sql, ",NULL);\n");
      }
    }
    fprintf(sql,
      "CREATE TABLE rule(\n"
      "  ruleid INTEGER PRIMARY KEY,\n"
      "  lhs INTEGER REFERENCES symbol(id),\n"
      "  txt TEXT\n"
      ");\n"
      "CREATE TABLE rulerhs(\n"
      "  ruleid INTEGER REFERENCES rule(ruleid),\n"
      "  pos INTEGER,\n"
      "  sym INTEGER REFERENCES symbol(id)\n"
      ");\n"
    );
    for(i=0, rp=lemp->rule; rp; rp=rp->next, i++){
      assert( i==rp->iRule );
      fprintf(sql,
        "INSERT INTO rule(ruleid,lhs,txt)VALUES(%d,%d,'",
        rp->iRule, rp->lhs->index
      );
      writeRuleText(sql, rp);
      fprintf(sql,"');\n");
      for(j=0; j<rp->nrhs; j++){
        struct symbol *sp = rp->rhs[j];
        if( sp->type!=MULTITERMINAL ){
          fprintf(sql,
            "INSERT INTO rulerhs(ruleid,pos,sym)VALUES(%d,%d,%d);\n",
            i,j,sp->index
          );
        }else{
          int k;
          for(k=0; k<sp->nsubsym; k++){
            fprintf(sql,
              "INSERT INTO rulerhs(ruleid,pos,sym)VALUES(%d,%d,%d);\n",
              i,j,sp->subsym[k]->index
            );
          }
        }
      }
    }
    fprintf(sql, "COMMIT;\n");
  }
  lineno = 1;

  fprintf(out, 
     "/* This file is automatically generated by Lemon from input grammar\n"
     "** source file \"%s\". */\n", lemp->filename); lineno += 2;
  
  /* The first %include directive begins with a C-language comment,
  ** then skip over the header comment of the template file
  */
  if( lemp->include==0 ) lemp->include = "";
  for(i=0; ISSPACE(lemp->include[i]); i++){
    if( lemp->include[i]=='\n' ){
      lemp->include += i+1;
      i = -1;
    }
  }
  if( lemp->include[0]=='/' ){
    tplt_skip_header(in,&lineno);
  }else{
    tplt_xfer(lemp->name,in,out,&lineno);
  }

  /* Generate the include code, if any */
  tplt_print(out,lemp,lemp->include,&lineno);
  if( mhflag ){
    char *incName = file_makename(lemp, ".h");
    fprintf(out,"#include \"%s\"\n", incName); lineno++;
    free(incName);
  }
  tplt_xfer(lemp->name,in,out,&lineno);

  /* Generate #defines for all tokens */
  if( lemp->tokenprefix ) prefix = lemp->tokenprefix;
  else                    prefix = "";
  if( mhflag ){
    fprintf(out,"#if INTERFACE\n"); lineno++;
  }else{
    fprintf(out,"#ifndef %s%s\n", prefix, lemp->symbols[1]->name);
  }
  for(i=1; i<lemp->nterminal; i++){
    fprintf(out,"#define %s%-30s %2d\n",prefix,lemp->symbols[i]->name,i);
    lineno++;
  }
  fprintf(out,"#endif\n"); lineno++;
  tplt_xfer(lemp->name,in,out,&lineno);

  /* Generate the defines */
  fprintf(out,"#define YYCODETYPE %s\n",
    minimum_size_type(0, lemp->nsymbol, &szCodeType)); lineno++;
  fprintf(out,"#define YYNOCODE %d\n",lemp->nsymbol);  lineno++;
  fprintf(out,"#define YYACTIONTYPE %s\n",
    minimum_size_type(0,lemp->maxAction,&szActionType)); lineno++;
  if( lemp->wildcard ){
    fprintf(out,"#define YYWILDCARD %d\n",
       lemp->wildcard->index); lineno++;
  }
  print_stack_union(out,lemp,&lineno,mhflag);
  fprintf(out, "#ifndef YYSTACKDEPTH\n"); lineno++;
  if( lemp->stacksize ){
    fprintf(out,"#define YYSTACKDEPTH %s\n",lemp->stacksize);  lineno++;
  }else{
    fprintf(out,"#define YYSTACKDEPTH 100\n");  lineno++;
  }
  fprintf(out, "#endif\n"); lineno++;
  if( mhflag ){
    fprintf(out,"#if INTERFACE\n"); lineno++;
  }
  name = lemp->name ? lemp->name : "Parse";
  if( lemp->arg && lemp->arg[0] ){
    i = lemonStrlen(lemp->arg);
    while( i>=1 && ISSPACE(lemp->arg[i-1]) ) i--;
    while( i>=1 && (ISALNUM(lemp->arg[i-1]) || lemp->arg[i-1]=='_') ) i--;
    fprintf(out,"#define %sARG_SDECL %s;\n",name,lemp->arg);  lineno++;
    fprintf(out,"#define %sARG_PDECL ,%s\n",name,lemp->arg);  lineno++;
    fprintf(out,"#define %sARG_PARAM ,%s\n",name,&lemp->arg[i]);  lineno++;
    fprintf(out,"#define %sARG_FETCH %s=yypParser->%s;\n",
                 name,lemp->arg,&lemp->arg[i]);  lineno++;
    fprintf(out,"#define %sARG_STORE yypParser->%s=%s;\n",
                 name,&lemp->arg[i],&lemp->arg[i]);  lineno++;
  }else{
    fprintf(out,"#define %sARG_SDECL\n",name); lineno++;
    fprintf(out,"#define %sARG_PDECL\n",name); lineno++;
    fprintf(out,"#define %sARG_PARAM\n",name); lineno++;
    fprintf(out,"#define %sARG_FETCH\n",name); lineno++;
    fprintf(out,"#define %sARG_STORE\n",name); lineno++;
  }
  if( lemp->ctx && lemp->ctx[0] ){
    i = lemonStrlen(lemp->ctx);
    while( i>=1 && ISSPACE(lemp->ctx[i-1]) ) i--;
    while( i>=1 && (ISALNUM(lemp->ctx[i-1]) || lemp->ctx[i-1]=='_') ) i--;
    fprintf(out,"#define %sCTX_SDECL %s;\n",name,lemp->ctx);  lineno++;
    fprintf(out,"#define %sCTX_PDECL ,%s\n",name,lemp->ctx);  lineno++;
    fprintf(out,"#define %sCTX_PARAM ,%s\n",name,&lemp->ctx[i]);  lineno++;
    fprintf(out,"#define %sCTX_FETCH %s=yypParser->%s;\n",
                 name,lemp->ctx,&lemp->ctx[i]);  lineno++;
    fprintf(out,"#define %sCTX_STORE yypParser->%s=%s;\n",
                 name,&lemp->ctx[i],&lemp->ctx[i]);  lineno++;
  }else{
    fprintf(out,"#define %sCTX_SDECL\n",name); lineno++;
    fprintf(out,"#define %sCTX_PDECL\n",name); lineno++;
    fprintf(out,"#define %sCTX_PARAM\n",name); lineno++;
    fprintf(out,"#define %sCTX_FETCH\n",name); lineno++;
    fprintf(out,"#define %sCTX_STORE\n",name); lineno++;
  }
  if( mhflag ){
    fprintf(out,"#endif\n"); lineno++;
  }
  if( lemp->errsym && lemp->errsym->useCnt ){
    fprintf(out,"#define YYERRORSYMBOL %d\n",lemp->errsym->index); lineno++;
    fprintf(out,"#define YYERRSYMDT yy%d\n",lemp->errsym->dtnum); lineno++;
  }
  if( lemp->has_fallback ){
    fprintf(out,"#define YYFALLBACK 1\n");  lineno++;
  }

  /* Compute the action table, but do not output it yet.  The action
  ** table must be computed before generating the YYNSTATE macro because
  ** we need to know how many states can be eliminated.
  */
  ax = (struct axset *) calloc(lemp->nxstate*2, sizeof(ax[0]));
  if( ax==0 ){
    fprintf(stderr,"malloc failed\n");
    exit(1);
  }
  for(i=0; i<lemp->nxstate; i++){
    stp = lemp->sorted[i];
    ax[i*2].stp = stp;
    ax[i*2].isTkn = 1;
    ax[i*2].nAction = stp->nTknAct;
    ax[i*2+1].stp = stp;
    ax[i*2+1].isTkn = 0;
    ax[i*2+1].nAction = stp->nNtAct;
  }
  mxTknOfst = mnTknOfst = 0;
  mxNtOfst = mnNtOfst = 0;
  /* In an effort to minimize the action table size, use the heuristic
  ** of placing the largest action sets first */
  for(i=0; i<lemp->nxstate*2; i++) ax[i].iOrder = i;
  qsort(ax, lemp->nxstate*2, sizeof(ax[0]), axset_compare);
  pActtab = acttab_alloc(lemp->nsymbol, lemp->nterminal);
  for(i=0; i<lemp->nxstate*2 && ax[i].nAction>0; i++){
    stp = ax[i].stp;
    if( ax[i].isTkn ){
      for(ap=stp->ap; ap; ap=ap->next){
        int action;
        if( ap->sp->index>=lemp->nterminal ) continue;
        action = compute_action(lemp, ap);
        if( action<0 ) continue;
        acttab_action(pActtab, ap->sp->index, action);
      }
      stp->iTknOfst = acttab_insert(pActtab, 1);
      if( stp->iTknOfst<mnTknOfst ) mnTknOfst = stp->iTknOfst;
      if( stp->iTknOfst>mxTknOfst ) mxTknOfst = stp->iTknOfst;
    }else{
      for(ap=stp->ap; ap; ap=ap->next){
        int action;
        if( ap->sp->index<lemp->nterminal ) continue;
        if( ap->sp->index==lemp->nsymbol ) continue;
        action = compute_action(lemp, ap);
        if( action<0 ) continue;
        acttab_action(pActtab, ap->sp->index, action);
      }
      stp->iNtOfst = acttab_insert(pActtab, 0);
      if( stp->iNtOfst<mnNtOfst ) mnNtOfst = stp->iNtOfst;
      if( stp->iNtOfst>mxNtOfst ) mxNtOfst = stp->iNtOfst;
    }
#if 0  /* Uncomment for a trace of how the yy_action[] table fills out */
    { int jj, nn;
      for(jj=nn=0; jj<pActtab->nAction; jj++){
        if( pActtab->aAction[jj].action<0 ) nn++;
      }
      printf("%4d: State %3d %s n: %2d size: %5d freespace: %d\n",
             i, stp->statenum, ax[i].isTkn ? "Token" : "Var  ",
             ax[i].nAction, pActtab->nAction, nn);
    }
#endif
  }
  free(ax);

  /* Mark rules that are actually used for reduce actions after all
  ** optimizations have been applied
  */
  for(rp=lemp->rule; rp; rp=rp->next) rp->doesReduce = LEMON_FALSE;
  for(i=0; i<lemp->nxstate; i++){
    for(ap=lemp->sorted[i]->ap; ap; ap=ap->next){
      if( ap->type==REDUCE || ap->type==SHIFTREDUCE ){
        ap->x.rp->doesReduce = 1;
      }
    }
  }

  /* Finish rendering the constants now that the action table has
  ** been computed */
  fprintf(out,"#define YYNSTATE             %d\n",lemp->nxstate);  lineno++;
  fprintf(out,"#define YYNRULE              %d\n",lemp->nrule);  lineno++;
  fprintf(out,"#define YYNRULE_WITH_ACTION  %d\n",lemp->nruleWithAction);
         lineno++;
  fprintf(out,"#define YYNTOKEN             %d\n",lemp->nterminal); lineno++;
  fprintf(out,"#define YY_MAX_SHIFT         %d\n",lemp->nxstate-1); lineno++;
  i = lemp->minShiftReduce;
  fprintf(out,"#define YY_MIN_SHIFTREDUCE   %d\n",i); lineno++;
  i += lemp->nrule;
  fprintf(out,"#define YY_MAX_SHIFTREDUCE   %d\n", i-1); lineno++;
  fprintf(out,"#define YY_ERROR_ACTION      %d\n", lemp->errAction); lineno++;
  fprintf(out,"#define YY_ACCEPT_ACTION     %d\n", lemp->accAction); lineno++;
  fprintf(out,"#define YY_NO_ACTION         %d\n", lemp->noAction); lineno++;
  fprintf(out,"#define YY_MIN_REDUCE        %d\n", lemp->minReduce); lineno++;
  i = lemp->minReduce + lemp->nrule;
  fprintf(out,"#define YY_MAX_REDUCE        %d\n", i-1); lineno++;
  tplt_xfer(lemp->name,in,out,&lineno);

  /* Now output the action table and its associates:
  **
  **  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.
  */

  /* Output the yy_action table */
  lemp->nactiontab = n = acttab_action_size(pActtab);
  lemp->tablesize += n*szActionType;
  fprintf(out,"#define YY_ACTTAB_COUNT (%d)\n", n); lineno++;
  fprintf(out,"static const YYACTIONTYPE yy_action[] = {\n"); lineno++;
  for(i=j=0; i<n; i++){
    int action = acttab_yyaction(pActtab, i);
    if( action<0 ) action = lemp->noAction;
    if( j==0 ) fprintf(out," /* %5d */ ", i);
    fprintf(out, " %4d,", action);
    if( j==9 || i==n-1 ){
      fprintf(out, "\n"); lineno++;
      j = 0;
    }else{
      j++;
    }
  }
  fprintf(out, "};\n"); lineno++;

  /* Output the yy_lookahead table */
  lemp->nlookaheadtab = n = acttab_lookahead_size(pActtab);
  lemp->tablesize += n*szCodeType;
  fprintf(out,"static const YYCODETYPE yy_lookahead[] = {\n"); lineno++;
  for(i=j=0; i<n; i++){
    int la = acttab_yylookahead(pActtab, i);
    if( la<0 ) la = lemp->nsymbol;
    if( j==0 ) fprintf(out," /* %5d */ ", i);
    fprintf(out, " %4d,", la);
    if( j==9 ){
      fprintf(out, "\n"); lineno++;
      j = 0;
    }else{
      j++;
    }
  }
  /* Add extra entries to the end of the yy_lookahead[] table so that
  ** yy_shift_ofst[]+iToken will always be a valid index into the array,
  ** even for the largest possible value of yy_shift_ofst[] and iToken. */
  nLookAhead = lemp->nterminal + lemp->nactiontab;
  while( i<nLookAhead ){
    if( j==0 ) fprintf(out," /* %5d */ ", i);
    fprintf(out, " %4d,", lemp->nterminal);
    if( j==9 ){
      fprintf(out, "\n"); lineno++;
      j = 0;
    }else{
      j++;
    }
    i++;
  }
  if( j>0 ){ fprintf(out, "\n"); lineno++; }
  fprintf(out, "};\n"); lineno++;

  /* Output the yy_shift_ofst[] table */
  n = lemp->nxstate;
  while( n>0 && lemp->sorted[n-1]->iTknOfst==NO_OFFSET ) n--;
  fprintf(out, "#define YY_SHIFT_COUNT    (%d)\n", n-1); lineno++;
  fprintf(out, "#define YY_SHIFT_MIN      (%d)\n", mnTknOfst); lineno++;
  fprintf(out, "#define YY_SHIFT_MAX      (%d)\n", mxTknOfst); lineno++;
  fprintf(out, "static const %s yy_shift_ofst[] = {\n",
       minimum_size_type(mnTknOfst, lemp->nterminal+lemp->nactiontab, &sz));
       lineno++;
  lemp->tablesize += n*sz;
  for(i=j=0; i<n; i++){
    int ofst;
    stp = lemp->sorted[i];
    ofst = stp->iTknOfst;
    if( ofst==NO_OFFSET ) ofst = lemp->nactiontab;
    if( j==0 ) fprintf(out," /* %5d */ ", i);
    fprintf(out, " %4d,", ofst);
    if( j==9 || i==n-1 ){
      fprintf(out, "\n"); lineno++;
      j = 0;
    }else{
      j++;
    }
  }
  fprintf(out, "};\n"); lineno++;

  /* Output the yy_reduce_ofst[] table */
  n = lemp->nxstate;
  while( n>0 && lemp->sorted[n-1]->iNtOfst==NO_OFFSET ) n--;
  fprintf(out, "#define YY_REDUCE_COUNT (%d)\n", n-1); lineno++;
  fprintf(out, "#define YY_REDUCE_MIN   (%d)\n", mnNtOfst); lineno++;
  fprintf(out, "#define YY_REDUCE_MAX   (%d)\n", mxNtOfst); lineno++;
  fprintf(out, "static const %s yy_reduce_ofst[] = {\n",
          minimum_size_type(mnNtOfst-1, mxNtOfst, &sz)); lineno++;
  lemp->tablesize += n*sz;
  for(i=j=0; i<n; i++){
    int ofst;
    stp = lemp->sorted[i];
    ofst = stp->iNtOfst;
    if( ofst==NO_OFFSET ) ofst = mnNtOfst - 1;
    if( j==0 ) fprintf(out," /* %5d */ ", i);
    fprintf(out, " %4d,", ofst);
    if( j==9 || i==n-1 ){
      fprintf(out, "\n"); lineno++;
      j = 0;
    }else{
      j++;
    }
  }
  fprintf(out, "};\n"); lineno++;

  /* Output the default action table */
  fprintf(out, "static const YYACTIONTYPE yy_default[] = {\n"); lineno++;
  n = lemp->nxstate;
  lemp->tablesize += n*szActionType;
  for(i=j=0; i<n; i++){
    stp = lemp->sorted[i];
    if( j==0 ) fprintf(out," /* %5d */ ", i);
    if( stp->iDfltReduce<0 ){
      fprintf(out, " %4d,", lemp->errAction);
    }else{
      fprintf(out, " %4d,", stp->iDfltReduce + lemp->minReduce);
    }
    if( j==9 || i==n-1 ){
      fprintf(out, "\n"); lineno++;
      j = 0;
    }else{
      j++;
    }
  }
  fprintf(out, "};\n"); lineno++;
  tplt_xfer(lemp->name,in,out,&lineno);

  /* Generate the table of fallback tokens.
  */
  if( lemp->has_fallback ){
    int mx = lemp->nterminal - 1;
    /* 2019-08-28:  Generate fallback entries for every token to avoid
    ** having to do a range check on the index */
    /* while( mx>0 && lemp->symbols[mx]->fallback==0 ){ mx--; } */
    lemp->tablesize += (mx+1)*szCodeType;
    for(i=0; i<=mx; i++){
      struct symbol *p = lemp->symbols[i];
      if( p->fallback==0 ){
        fprintf(out, "    0,  /* %10s => nothing */\n", p->name);
      }else{
        fprintf(out, "  %3d,  /* %10s => %s */\n", p->fallback->index,
          p->name, p->fallback->name);
      }
      lineno++;
    }
  }
  tplt_xfer(lemp->name, in, out, &lineno);

  /* Generate a table containing the symbolic name of every symbol
  */
  for(i=0; i<lemp->nsymbol; i++){
    fprintf(out,"  /* %4d */ \"%s\",\n",i, lemp->symbols[i]->name); lineno++;
  }
  tplt_xfer(lemp->name,in,out,&lineno);

  /* Generate a table containing a text string that describes every
  ** rule in the rule set of the grammar.  This information is used
  ** when tracing REDUCE actions.
  */
  for(i=0, rp=lemp->rule; rp; rp=rp->next, i++){
    assert( rp->iRule==i );
    fprintf(out," /* %3d */ \"", i);
    writeRuleText(out, rp);
    fprintf(out,"\",\n"); lineno++;
  }
  tplt_xfer(lemp->name,in,out,&lineno);

  /* Generate code which executes every time a symbol is popped from
  ** the stack while processing errors or while destroying the parser.
  ** (In other words, generate the %destructor actions)
  */
  if( lemp->tokendest ){
    int once = 1;
    for(i=0; i<lemp->nsymbol; i++){
      struct symbol *sp = lemp->symbols[i];
      if( sp==0 || sp->type!=TERMINAL ) continue;
      if( once ){
        fprintf(out, "      /* TERMINAL Destructor */\n"); lineno++;
        once = 0;
      }
      fprintf(out,"    case %d: /* %s */\n", sp->index, sp->name); lineno++;
    }
    for(i=0; i<lemp->nsymbol && lemp->symbols[i]->type!=TERMINAL; i++);
    if( i<lemp->nsymbol ){
      emit_destructor_code(out,lemp->symbols[i],lemp,&lineno);
      fprintf(out,"      break;\n"); lineno++;
    }
  }
  if( lemp->vardest ){
    struct symbol *dflt_sp = 0;
    int once = 1;
    for(i=0; i<lemp->nsymbol; i++){
      struct symbol *sp = lemp->symbols[i];
      if( sp==0 || sp->type==TERMINAL ||
          sp->index<=0 || sp->destructor!=0 ) continue;
      if( once ){
        fprintf(out, "      /* Default NON-TERMINAL Destructor */\n");lineno++;
        once = 0;
      }
      fprintf(out,"    case %d: /* %s */\n", sp->index, sp->name); lineno++;
      dflt_sp = sp;
    }
    if( dflt_sp!=0 ){
      emit_destructor_code(out,dflt_sp,lemp,&lineno);
    }
    fprintf(out,"      break;\n"); lineno++;
  }
  for(i=0; i<lemp->nsymbol; i++){
    struct symbol *sp = lemp->symbols[i];
    if( sp==0 || sp->type==TERMINAL || sp->destructor==0 ) continue;
    if( sp->destLineno<0 ) continue;  /* Already emitted */
    fprintf(out,"    case %d: /* %s */\n", sp->index, sp->name); lineno++;

    /* Combine duplicate destructors into a single case */
    for(j=i+1; j<lemp->nsymbol; j++){
      struct symbol *sp2 = lemp->symbols[j];
      if( sp2 && sp2->type!=TERMINAL && sp2->destructor
          && sp2->dtnum==sp->dtnum
          && strcmp(sp->destructor,sp2->destructor)==0 ){
         fprintf(out,"    case %d: /* %s */\n",
                 sp2->index, sp2->name); lineno++;
         sp2->destLineno = -1;  /* Avoid emitting this destructor again */
      }
    }

    emit_destructor_code(out,lemp->symbols[i],lemp,&lineno);
    fprintf(out,"      break;\n"); lineno++;
  }
  tplt_xfer(lemp->name,in,out,&lineno);

  /* Generate code which executes whenever the parser stack overflows */
  tplt_print(out,lemp,lemp->overflow,&lineno);
  tplt_xfer(lemp->name,in,out,&lineno);

  /* Generate the tables of rule information.  yyRuleInfoLhs[] and
  ** yyRuleInfoNRhs[].
  **
  ** Note: This code depends on the fact that rules are number
  ** sequentially beginning with 0.
  */
  for(i=0, rp=lemp->rule; rp; rp=rp->next, i++){
    fprintf(out,"  %4d,  /* (%d) ", rp->lhs->index, i);
     rule_print(out, rp);
    fprintf(out," */\n"); lineno++;
  }
  tplt_xfer(lemp->name,in,out,&lineno);
  for(i=0, rp=lemp->rule; rp; rp=rp->next, i++){
    fprintf(out,"  %3d,  /* (%d) ", -rp->nrhs, i);
    rule_print(out, rp);
    fprintf(out," */\n"); lineno++;
  }
  tplt_xfer(lemp->name,in,out,&lineno);

  /* Generate code which execution during each REDUCE action */
  i = 0;
  for(rp=lemp->rule; rp; rp=rp->next){
    i += translate_code(lemp, rp);
  }
  if( i ){
    fprintf(out,"        YYMINORTYPE yylhsminor;\n"); lineno++;
  }
  /* First output rules other than the default: rule */
  for(rp=lemp->rule; rp; rp=rp->next){
    struct rule *rp2;               /* Other rules with the same action */
    if( rp->codeEmitted ) continue;
    if( rp->noCode ){
      /* No C code actions, so this will be part of the "default:" rule */
      continue;
    }
    fprintf(out,"      case %d: /* ", rp->iRule);
    writeRuleText(out, rp);
    fprintf(out, " */\n"); lineno++;
    for(rp2=rp->next; rp2; rp2=rp2->next){
      if( rp2->code==rp->code && rp2->codePrefix==rp->codePrefix
             && rp2->codeSuffix==rp->codeSuffix ){
        fprintf(out,"      case %d: /* ", rp2->iRule);
        writeRuleText(out, rp2);
        fprintf(out," */ yytestcase(yyruleno==%d);\n", rp2->iRule); lineno++;
        rp2->codeEmitted = 1;
      }
    }
    emit_code(out,rp,lemp,&lineno);
    fprintf(out,"        break;\n"); lineno++;
    rp->codeEmitted = 1;
  }
  /* Finally, output the default: rule.  We choose as the default: all
  ** empty actions. */
  fprintf(out,"      default:\n"); lineno++;
  for(rp=lemp->rule; rp; rp=rp->next){
    if( rp->codeEmitted ) continue;
    assert( rp->noCode );
    fprintf(out,"      /* (%d) ", rp->iRule);
    writeRuleText(out, rp);
    if( rp->neverReduce ){
      fprintf(out, " (NEVER REDUCES) */ assert(yyruleno!=%d);\n",
              rp->iRule); lineno++;
    }else if( rp->doesReduce ){
      fprintf(out, " */ yytestcase(yyruleno==%d);\n", rp->iRule); lineno++;
    }else{
      fprintf(out, " (OPTIMIZED OUT) */ assert(yyruleno!=%d);\n",
              rp->iRule); lineno++;
    }
  }
  fprintf(out,"        break;\n"); lineno++;
  tplt_xfer(lemp->name,in,out,&lineno);

  /* Generate code which executes if a parse fails */
  tplt_print(out,lemp,lemp->failure,&lineno);
  tplt_xfer(lemp->name,in,out,&lineno);

  /* Generate code which executes when a syntax error occurs */
  tplt_print(out,lemp,lemp->error,&lineno);
  tplt_xfer(lemp->name,in,out,&lineno);

  /* Generate code which executes when the parser accepts its input */
  tplt_print(out,lemp,lemp->accept,&lineno);
  tplt_xfer(lemp->name,in,out,&lineno);

  /* Append any addition code the user desires */
  tplt_print(out,lemp,lemp->extracode,&lineno);

  acttab_free(pActtab);
  fclose(in);
  fclose(out);
  if( sql ) fclose(sql);
  return;
}

/* Generate a header file for the parser */
void ReportHeader(struct lemon *lemp)
{
  FILE *out, *in;
  const char *prefix;
  char line[LINESIZE];
  char pattern[LINESIZE];
  int i;

  if( lemp->tokenprefix ) prefix = lemp->tokenprefix;
  else                    prefix = "";
  in = file_open(lemp,".h","rb");
  if( in ){
    int nextChar;
    for(i=1; i<lemp->nterminal && fgets(line,LINESIZE,in); i++){
      lemon_sprintf(pattern,"#define %s%-30s %3d\n",
                    prefix,lemp->symbols[i]->name,i);
      if( strcmp(line,pattern) ) break;
    }
    nextChar = fgetc(in);
    fclose(in);
    if( i==lemp->nterminal && nextChar==EOF ){
      /* No change in the file.  Don't rewrite it. */
      return;
    }
  }
  out = file_open(lemp,".h","wb");
  if( out ){
    for(i=1; i<lemp->nterminal; i++){
      fprintf(out,"#define %s%-30s %3d\n",prefix,lemp->symbols[i]->name,i);
    }
    fclose(out);
  }
  return;
}

/* Reduce the size of the action tables, if possible, by making use
** of defaults.
**
** In this version, we take the most frequent REDUCE action and make
** it the default.  Except, there is no default if the wildcard token
** is a possible look-ahead.
*/
void CompressTables(struct lemon *lemp)
{
  struct state *stp;
  struct action *ap, *ap2, *nextap;
  struct rule *rp, *rp2, *rbest;
  int nbest, n;
  int i;
  int usesWildcard;

  for(i=0; i<lemp->nstate; i++){
    stp = lemp->sorted[i];
    nbest = 0;
    rbest = 0;
    usesWildcard = 0;

    for(ap=stp->ap; ap; ap=ap->next){
      if( ap->type==SHIFT && ap->sp==lemp->wildcard ){
        usesWildcard = 1;
      }
      if( ap->type!=REDUCE ) continue;
      rp = ap->x.rp;
      if( rp->lhsStart ) continue;
      if( rp==rbest ) continue;
      n = 1;
      for(ap2=ap->next; ap2; ap2=ap2->next){
        if( ap2->type!=REDUCE ) continue;
        rp2 = ap2->x.rp;
        if( rp2==rbest ) continue;
        if( rp2==rp ) n++;
      }
      if( n>nbest ){
        nbest = n;
        rbest = rp;
      }
    }

    /* Do not make a default if the number of rules to default
    ** is not at least 1 or if the wildcard token is a possible
    ** lookahead.
    */
    if( nbest<1 || usesWildcard ) continue;


    /* Combine matching REDUCE actions into a single default */
    for(ap=stp->ap; ap; ap=ap->next){
      if( ap->type==REDUCE && ap->x.rp==rbest ) break;
    }
    assert( ap );
    ap->sp = Symbol_new("{default}");
    for(ap=ap->next; ap; ap=ap->next){
      if( ap->type==REDUCE && ap->x.rp==rbest ) ap->type = NOT_USED;
    }
    stp->ap = Action_sort(stp->ap);

    for(ap=stp->ap; ap; ap=ap->next){
      if( ap->type==SHIFT ) break;
      if( ap->type==REDUCE && ap->x.rp!=rbest ) break;
    }
    if( ap==0 ){
      stp->autoReduce = 1;
      stp->pDfltReduce = rbest;
    }
  }

  /* Make a second pass over all states and actions.  Convert
  ** every action that is a SHIFT to an autoReduce state into
  ** a SHIFTREDUCE action.
  */
  for(i=0; i<lemp->nstate; i++){
    stp = lemp->sorted[i];
    for(ap=stp->ap; ap; ap=ap->next){
      struct state *pNextState;
      if( ap->type!=SHIFT ) continue;
      pNextState = ap->x.stp;
      if( pNextState->autoReduce && pNextState->pDfltReduce!=0 ){
        ap->type = SHIFTREDUCE;
        ap->x.rp = pNextState->pDfltReduce;
      }
    }
  }

  /* If a SHIFTREDUCE action specifies a rule that has a single RHS term
  ** (meaning that the SHIFTREDUCE will land back in the state where it
  ** started) and if there is no C-code associated with the reduce action,
  ** then we can go ahead and convert the action to be the same as the
  ** action for the RHS of the rule.
  */
  for(i=0; i<lemp->nstate; i++){
    stp = lemp->sorted[i];
    for(ap=stp->ap; ap; ap=nextap){
      nextap = ap->next;
      if( ap->type!=SHIFTREDUCE ) continue;
      rp = ap->x.rp;
      if( rp->noCode==0 ) continue;
      if( rp->nrhs!=1 ) continue;
#if 1
      /* Only apply this optimization to non-terminals.  It would be OK to
      ** apply it to terminal symbols too, but that makes the parser tables
      ** larger. */
      if( ap->sp->index<lemp->nterminal ) continue;
#endif
      /* If we reach this point, it means the optimization can be applied */
      nextap = ap;
      for(ap2=stp->ap; ap2 && (ap2==ap || ap2->sp!=rp->lhs); ap2=ap2->next){}
      assert( ap2!=0 );
      ap->spOpt = ap2->sp;
      ap->type = ap2->type;
      ap->x = ap2->x;
    }
  }
}


/*
** Compare two states for sorting purposes.  The smaller state is the
** one with the most non-terminal actions.  If they have the same number
** of non-terminal actions, then the smaller is the one with the most
** token actions.
*/
static int stateResortCompare(const void *a, const void *b){
  const struct state *pA = *(const struct state**)a;
  const struct state *pB = *(const struct state**)b;
  int n;

  n = pB->nNtAct - pA->nNtAct;
  if( n==0 ){
    n = pB->nTknAct - pA->nTknAct;
    if( n==0 ){
      n = pB->statenum - pA->statenum;
    }
  }
  assert( n!=0 );
  return n;
}


/*
** Renumber and resort states so that states with fewer choices
** occur at the end.  Except, keep state 0 as the first state.
*/
void ResortStates(struct lemon *lemp)
{
  int i;
  struct state *stp;
  struct action *ap;

  for(i=0; i<lemp->nstate; i++){
    stp = lemp->sorted[i];
    stp->nTknAct = stp->nNtAct = 0;
    stp->iDfltReduce = -1; /* Init dflt action to "syntax error" */
    stp->iTknOfst = NO_OFFSET;
    stp->iNtOfst = NO_OFFSET;
    for(ap=stp->ap; ap; ap=ap->next){
      int iAction = compute_action(lemp,ap);
      if( iAction>=0 ){
        if( ap->sp->index<lemp->nterminal ){
          stp->nTknAct++;
        }else if( ap->sp->index<lemp->nsymbol ){
          stp->nNtAct++;
        }else{
          assert( stp->autoReduce==0 || stp->pDfltReduce==ap->x.rp );
          stp->iDfltReduce = iAction;
        }
      }
    }
  }
  qsort(&lemp->sorted[1], lemp->nstate-1, sizeof(lemp->sorted[0]),
        stateResortCompare);
  for(i=0; i<lemp->nstate; i++){
    lemp->sorted[i]->statenum = i;
  }
  lemp->nxstate = lemp->nstate;
  while( lemp->nxstate>1 && lemp->sorted[lemp->nxstate-1]->autoReduce ){
    lemp->nxstate--;
  }
}


/***************** From the file "set.c" ************************************/
/*
** Set manipulation routines for the LEMON parser generator.
*/

static int size = 0;

/* Set the set size */
void SetSize(int n)
{
  size = n+1;
}

/* Allocate a new set */
char *SetNew(void){
  char *s;
  s = (char*)calloc( size, 1);
  if( s==0 ){
    memory_error();
  }
  return s;
}

/* Deallocate a set */
void SetFree(char *s)
{
  free(s);
}

/* Add a new element to the set.  Return TRUE if the element was added
** and FALSE if it was already there. */
int SetAdd(char *s, int e)
{
  int rv;
  assert( e>=0 && e<size );
  rv = s[e];
  s[e] = 1;
  return !rv;
}

/* Add every element of s2 to s1.  Return TRUE if s1 changes. */
int SetUnion(char *s1, char *s2)
{
  int i, progress;
  progress = 0;
  for(i=0; i<size; i++){
    if( s2[i]==0 ) continue;
    if( s1[i]==0 ){
      progress = 1;
      s1[i] = 1;
    }
  }
  return progress;
}
/********************** From the file "table.c" ****************************/
/*
** All code in this file has been automatically generated
** from a specification in the file
**              "table.q"
** by the associative array code building program "aagen".
** Do not edit this file!  Instead, edit the specification
** file, then rerun aagen.
*/
/*
** Code for processing tables in the LEMON parser generator.
*/

PRIVATE unsigned strhash(const char *x)
{
  unsigned h = 0;
  while( *x ) h = h*13 + *(x++);
  return h;
}

/* Works like strdup, sort of.  Save a string in malloced memory, but
** keep strings in a table so that the same string is not in more
** than one place.
*/
const char *Strsafe(const char *y)
{
  const char *z;
  char *cpy;

  if( y==0 ) return 0;
  z = Strsafe_find(y);
  if( z==0 && (cpy=(char *)malloc( lemonStrlen(y)+1 ))!=0 ){
    lemon_strcpy(cpy,y);
    z = cpy;
    Strsafe_insert(z);
  }
  MemoryCheck(z);
  return z;
}

/* There is one instance of the following structure for each
** associative array of type "x1".
*/
struct s_x1 {
  int size;               /* The number of available slots. */
                          /*   Must be a power of 2 greater than or */
                          /*   equal to 1 */
  int count;              /* Number of currently slots filled */
  struct s_x1node *tbl;  /* The data stored here */
  struct s_x1node **ht;  /* Hash table for lookups */
};

/* There is one instance of this structure for every data element
** in an associative array of type "x1".
*/
typedef struct s_x1node {
  const char *data;        /* The data */
  struct s_x1node *next;   /* Next entry with the same hash */
  struct s_x1node **from;  /* Previous link */
} x1node;

/* There is only one instance of the array, which is the following */
static struct s_x1 *x1a;

/* Allocate a new associative array */
void Strsafe_init(void){
  if( x1a ) return;
  x1a = (struct s_x1*)malloc( sizeof(struct s_x1) );
  if( x1a ){
    x1a->size = 1024;
    x1a->count = 0;
    x1a->tbl = (x1node*)calloc(1024, sizeof(x1node) + sizeof(x1node*));
    if( x1a->tbl==0 ){
      free(x1a);
      x1a = 0;
    }else{
      int i;
      x1a->ht = (x1node**)&(x1a->tbl[1024]);
      for(i=0; i<1024; i++) x1a->ht[i] = 0;
    }
  }
}
/* Insert a new record into the array.  Return TRUE if successful.
** Prior data with the same key is NOT overwritten */
int Strsafe_insert(const char *data)
{
  x1node *np;
  unsigned h;
  unsigned ph;

  if( x1a==0 ) return 0;
  ph = strhash(data);
  h = ph & (x1a->size-1);
  np = x1a->ht[h];
  while( np ){
    if( strcmp(np->data,data)==0 ){
      /* An existing entry with the same key is found. */
      /* Fail because overwrite is not allows. */
      return 0;
    }
    np = np->next;
  }
  if( x1a->count>=x1a->size ){
    /* Need to make the hash table bigger */
    int i,arrSize;
    struct s_x1 array;
    array.size = arrSize = x1a->size*2;
    array.count = x1a->count;
    array.tbl = (x1node*)calloc(arrSize, sizeof(x1node) + sizeof(x1node*));
    if( array.tbl==0 ) return 0;  /* Fail due to malloc failure */
    array.ht = (x1node**)&(array.tbl[arrSize]);
    for(i=0; i<arrSize; i++) array.ht[i] = 0;
    for(i=0; i<x1a->count; i++){
      x1node *oldnp, *newnp;
      oldnp = &(x1a->tbl[i]);
      h = strhash(oldnp->data) & (arrSize-1);
      newnp = &(array.tbl[i]);
      if( array.ht[h] ) array.ht[h]->from = &(newnp->next);
      newnp->next = array.ht[h];
      newnp->data = oldnp->data;
      newnp->from = &(array.ht[h]);
      array.ht[h] = newnp;
    }
    /* free(x1a->tbl); // This program was originally for 16-bit machines.
    ** Don't worry about freeing memory on modern platforms. */
    *x1a = array;
  }
  /* Insert the new data */
  h = ph & (x1a->size-1);
  np = &(x1a->tbl[x1a->count++]);
  np->data = data;
  if( x1a->ht[h] ) x1a->ht[h]->from = &(np->next);
  np->next = x1a->ht[h];
  x1a->ht[h] = np;
  np->from = &(x1a->ht[h]);
  return 1;
}

/* Return a pointer to data assigned to the given key.  Return NULL
** if no such key. */
const char *Strsafe_find(const char *key)
{
  unsigned h;
  x1node *np;

  if( x1a==0 ) return 0;
  h = strhash(key) & (x1a->size-1);
  np = x1a->ht[h];
  while( np ){
    if( strcmp(np->data,key)==0 ) break;
    np = np->next;
  }
  return np ? np->data : 0;
}

/* Return a pointer to the (terminal or nonterminal) symbol "x".
** Create a new symbol if this is the first time "x" has been seen.
*/
struct symbol *Symbol_new(const char *x)
{
  struct symbol *sp;

  sp = Symbol_find(x);
  if( sp==0 ){
    sp = (struct symbol *)calloc(1, sizeof(struct symbol) );
    MemoryCheck(sp);
    sp->name = Strsafe(x);
    sp->type = ISUPPER(*x) ? TERMINAL : NONTERMINAL;
    sp->rule = 0;
    sp->fallback = 0;
    sp->prec = -1;
    sp->assoc = UNK;
    sp->firstset = 0;
    sp->lambda = LEMON_FALSE;
    sp->destructor = 0;
    sp->destLineno = 0;
    sp->datatype = 0;
    sp->useCnt = 0;
    Symbol_insert(sp,sp->name);
  }
  sp->useCnt++;
  return sp;
}

/* Compare two symbols for sorting purposes.  Return negative,
** zero, or positive if a is less then, equal to, or greater
** than b.
**
** Symbols that begin with upper case letters (terminals or tokens)
** must sort before symbols that begin with lower case letters
** (non-terminals).  And MULTITERMINAL symbols (created using the
** %token_class directive) must sort at the very end. Other than
** that, the order does not matter.
**
** We find experimentally that leaving the symbols in their original
** order (the order they appeared in the grammar file) gives the
** smallest parser tables in SQLite.
*/
int Symbolcmpp(const void *_a, const void *_b)
{
  const struct symbol *a = *(const struct symbol **) _a;
  const struct symbol *b = *(const struct symbol **) _b;
  int i1 = a->type==MULTITERMINAL ? 3 : a->name[0]>'Z' ? 2 : 1;
  int i2 = b->type==MULTITERMINAL ? 3 : b->name[0]>'Z' ? 2 : 1;
  return i1==i2 ? a->index - b->index : i1 - i2;
}

/* There is one instance of the following structure for each
** associative array of type "x2".
*/
struct s_x2 {
  int size;               /* The number of available slots. */
                          /*   Must be a power of 2 greater than or */
                          /*   equal to 1 */
  int count;              /* Number of currently slots filled */
  struct s_x2node *tbl;  /* The data stored here */
  struct s_x2node **ht;  /* Hash table for lookups */
};

/* There is one instance of this structure for every data element
** in an associative array of type "x2".
*/
typedef struct s_x2node {
  struct symbol *data;     /* The data */
  const char *key;         /* The key */
  struct s_x2node *next;   /* Next entry with the same hash */
  struct s_x2node **from;  /* Previous link */
} x2node;

/* There is only one instance of the array, which is the following */
static struct s_x2 *x2a;

/* Allocate a new associative array */
void Symbol_init(void){
  if( x2a ) return;
  x2a = (struct s_x2*)malloc( sizeof(struct s_x2) );
  if( x2a ){
    x2a->size = 128;
    x2a->count = 0;
    x2a->tbl = (x2node*)calloc(128, sizeof(x2node) + sizeof(x2node*));
    if( x2a->tbl==0 ){
      free(x2a);
      x2a = 0;
    }else{
      int i;
      x2a->ht = (x2node**)&(x2a->tbl[128]);
      for(i=0; i<128; i++) x2a->ht[i] = 0;
    }
  }
}
/* Insert a new record into the array.  Return TRUE if successful.
** Prior data with the same key is NOT overwritten */
int Symbol_insert(struct symbol *data, const char *key)
{
  x2node *np;
  unsigned h;
  unsigned ph;

  if( x2a==0 ) return 0;
  ph = strhash(key);
  h = ph & (x2a->size-1);
  np = x2a->ht[h];
  while( np ){
    if( strcmp(np->key,key)==0 ){
      /* An existing entry with the same key is found. */
      /* Fail because overwrite is not allows. */
      return 0;
    }
    np = np->next;
  }
  if( x2a->count>=x2a->size ){
    /* Need to make the hash table bigger */
    int i,arrSize;
    struct s_x2 array;
    array.size = arrSize = x2a->size*2;
    array.count = x2a->count;
    array.tbl = (x2node*)calloc(arrSize, sizeof(x2node) + sizeof(x2node*));
    if( array.tbl==0 ) return 0;  /* Fail due to malloc failure */
    array.ht = (x2node**)&(array.tbl[arrSize]);
    for(i=0; i<arrSize; i++) array.ht[i] = 0;
    for(i=0; i<x2a->count; i++){
      x2node *oldnp, *newnp;
      oldnp = &(x2a->tbl[i]);
      h = strhash(oldnp->key) & (arrSize-1);
      newnp = &(array.tbl[i]);
      if( array.ht[h] ) array.ht[h]->from = &(newnp->next);
      newnp->next = array.ht[h];
      newnp->key = oldnp->key;
      newnp->data = oldnp->data;
      newnp->from = &(array.ht[h]);
      array.ht[h] = newnp;
    }
    /* free(x2a->tbl); // This program was originally written for 16-bit
    ** machines.  Don't worry about freeing this trivial amount of memory
    ** on modern platforms.  Just leak it. */
    *x2a = array;
  }
  /* Insert the new data */
  h = ph & (x2a->size-1);
  np = &(x2a->tbl[x2a->count++]);
  np->key = key;
  np->data = data;
  if( x2a->ht[h] ) x2a->ht[h]->from = &(np->next);
  np->next = x2a->ht[h];
  x2a->ht[h] = np;
  np->from = &(x2a->ht[h]);
  return 1;
}

/* Return a pointer to data assigned to the given key.  Return NULL
** if no such key. */
struct symbol *Symbol_find(const char *key)
{
  unsigned h;
  x2node *np;

  if( x2a==0 ) return 0;
  h = strhash(key) & (x2a->size-1);
  np = x2a->ht[h];
  while( np ){
    if( strcmp(np->key,key)==0 ) break;
    np = np->next;
  }
  return np ? np->data : 0;
}

/* Return the n-th data.  Return NULL if n is out of range. */
struct symbol *Symbol_Nth(int n)
{
  struct symbol *data;
  if( x2a && n>0 && n<=x2a->count ){
    data = x2a->tbl[n-1].data;
  }else{
    data = 0;
  }
  return data;
}

/* Return the size of the array */
int Symbol_count()
{
  return x2a ? x2a->count : 0;
}

/* Return an array of pointers to all data in the table.
** The array is obtained from malloc.  Return NULL if memory allocation
** problems, or if the array is empty. */
struct symbol **Symbol_arrayof()
{
  struct symbol **array;
  int i,arrSize;
  if( x2a==0 ) return 0;
  arrSize = x2a->count;
  array = (struct symbol **)calloc(arrSize, sizeof(struct symbol *));
  if( array ){
    for(i=0; i<arrSize; i++) array[i] = x2a->tbl[i].data;
  }
  return array;
}

/* Compare two configurations */
int Configcmp(const char *_a,const char *_b)
{
  const struct config *a = (struct config *) _a;
  const struct config *b = (struct config *) _b;
  int x;
  x = a->rp->index - b->rp->index;
  if( x==0 ) x = a->dot - b->dot;
  return x;
}

/* Compare two states */
PRIVATE int statecmp(struct config *a, struct config *b)
{
  int rc;
  for(rc=0; rc==0 && a && b;  a=a->bp, b=b->bp){
    rc = a->rp->index - b->rp->index;
    if( rc==0 ) rc = a->dot - b->dot;
  }
  if( rc==0 ){
    if( a ) rc = 1;
    if( b ) rc = -1;
  }
  return rc;
}

/* Hash a state */
PRIVATE unsigned statehash(struct config *a)
{
  unsigned h=0;
  while( a ){
    h = h*571 + a->rp->index*37 + a->dot;
    a = a->bp;
  }
  return h;
}

/* Allocate a new state structure */
struct state *State_new()
{
  struct state *newstate;
  newstate = (struct state *)calloc(1, sizeof(struct state) );
  MemoryCheck(newstate);
  return newstate;
}

/* There is one instance of the following structure for each
** associative array of type "x3".
*/
struct s_x3 {
  int size;               /* The number of available slots. */
                          /*   Must be a power of 2 greater than or */
                          /*   equal to 1 */
  int count;              /* Number of currently slots filled */
  struct s_x3node *tbl;  /* The data stored here */
  struct s_x3node **ht;  /* Hash table for lookups */
};

/* There is one instance of this structure for every data element
** in an associative array of type "x3".
*/
typedef struct s_x3node {
  struct state *data;                  /* The data */
  struct config *key;                   /* The key */
  struct s_x3node *next;   /* Next entry with the same hash */
  struct s_x3node **from;  /* Previous link */
} x3node;

/* There is only one instance of the array, which is the following */
static struct s_x3 *x3a;

/* Allocate a new associative array */
void State_init(void){
  if( x3a ) return;
  x3a = (struct s_x3*)malloc( sizeof(struct s_x3) );
  if( x3a ){
    x3a->size = 128;
    x3a->count = 0;
    x3a->tbl = (x3node*)calloc(128, sizeof(x3node) + sizeof(x3node*));
    if( x3a->tbl==0 ){
      free(x3a);
      x3a = 0;
    }else{
      int i;
      x3a->ht = (x3node**)&(x3a->tbl[128]);
      for(i=0; i<128; i++) x3a->ht[i] = 0;
    }
  }
}
/* Insert a new record into the array.  Return TRUE if successful.
** Prior data with the same key is NOT overwritten */
int State_insert(struct state *data, struct config *key)
{
  x3node *np;
  unsigned h;
  unsigned ph;

  if( x3a==0 ) return 0;
  ph = statehash(key);
  h = ph & (x3a->size-1);
  np = x3a->ht[h];
  while( np ){
    if( statecmp(np->key,key)==0 ){
      /* An existing entry with the same key is found. */
      /* Fail because overwrite is not allows. */
      return 0;
    }
    np = np->next;
  }
  if( x3a->count>=x3a->size ){
    /* Need to make the hash table bigger */
    int i,arrSize;
    struct s_x3 array;
    array.size = arrSize = x3a->size*2;
    array.count = x3a->count;
    array.tbl = (x3node*)calloc(arrSize, sizeof(x3node) + sizeof(x3node*));
    if( array.tbl==0 ) return 0;  /* Fail due to malloc failure */
    array.ht = (x3node**)&(array.tbl[arrSize]);
    for(i=0; i<arrSize; i++) array.ht[i] = 0;
    for(i=0; i<x3a->count; i++){
      x3node *oldnp, *newnp;
      oldnp = &(x3a->tbl[i]);
      h = statehash(oldnp->key) & (arrSize-1);
      newnp = &(array.tbl[i]);
      if( array.ht[h] ) array.ht[h]->from = &(newnp->next);
      newnp->next = array.ht[h];
      newnp->key = oldnp->key;
      newnp->data = oldnp->data;
      newnp->from = &(array.ht[h]);
      array.ht[h] = newnp;
    }
    free(x3a->tbl);
    *x3a = array;
  }
  /* Insert the new data */
  h = ph & (x3a->size-1);
  np = &(x3a->tbl[x3a->count++]);
  np->key = key;
  np->data = data;
  if( x3a->ht[h] ) x3a->ht[h]->from = &(np->next);
  np->next = x3a->ht[h];
  x3a->ht[h] = np;
  np->from = &(x3a->ht[h]);
  return 1;
}

/* Return a pointer to data assigned to the given key.  Return NULL
** if no such key. */
struct state *State_find(struct config *key)
{
  unsigned h;
  x3node *np;

  if( x3a==0 ) return 0;
  h = statehash(key) & (x3a->size-1);
  np = x3a->ht[h];
  while( np ){
    if( statecmp(np->key,key)==0 ) break;
    np = np->next;
  }
  return np ? np->data : 0;
}

/* Return an array of pointers to all data in the table.
** The array is obtained from malloc.  Return NULL if memory allocation
** problems, or if the array is empty. */
struct state **State_arrayof(void)
{
  struct state **array;
  int i,arrSize;
  if( x3a==0 ) return 0;
  arrSize = x3a->count;
  array = (struct state **)calloc(arrSize, sizeof(struct state *));
  if( array ){
    for(i=0; i<arrSize; i++) array[i] = x3a->tbl[i].data;
  }
  return array;
}

/* Hash a configuration */
PRIVATE unsigned confighash(struct config *a)
{
  unsigned h=0;
  h = h*571 + a->rp->index*37 + a->dot;
  return h;
}

/* There is one instance of the following structure for each
** associative array of type "x4".
*/
struct s_x4 {
  int size;               /* The number of available slots. */
                          /*   Must be a power of 2 greater than or */
                          /*   equal to 1 */
  int count;              /* Number of currently slots filled */
  struct s_x4node *tbl;  /* The data stored here */
  struct s_x4node **ht;  /* Hash table for lookups */
};

/* There is one instance of this structure for every data element
** in an associative array of type "x4".
*/
typedef struct s_x4node {
  struct config *data;                  /* The data */
  struct s_x4node *next;   /* Next entry with the same hash */
  struct s_x4node **from;  /* Previous link */
} x4node;

/* There is only one instance of the array, which is the following */
static struct s_x4 *x4a;

/* Allocate a new associative array */
void Configtable_init(void){
  if( x4a ) return;
  x4a = (struct s_x4*)malloc( sizeof(struct s_x4) );
  if( x4a ){
    x4a->size = 64;
    x4a->count = 0;
    x4a->tbl = (x4node*)calloc(64, sizeof(x4node) + sizeof(x4node*));
    if( x4a->tbl==0 ){
      free(x4a);
      x4a = 0;
    }else{
      int i;
      x4a->ht = (x4node**)&(x4a->tbl[64]);
      for(i=0; i<64; i++) x4a->ht[i] = 0;
    }
  }
}
/* Insert a new record into the array.  Return TRUE if successful.
** Prior data with the same key is NOT overwritten */
int Configtable_insert(struct config *data)
{
  x4node *np;
  unsigned h;
  unsigned ph;

  if( x4a==0 ) return 0;
  ph = confighash(data);
  h = ph & (x4a->size-1);
  np = x4a->ht[h];
  while( np ){
    if( Configcmp((const char *) np->data,(const char *) data)==0 ){
      /* An existing entry with the same key is found. */
      /* Fail because overwrite is not allows. */
      return 0;
    }
    np = np->next;
  }
  if( x4a->count>=x4a->size ){
    /* Need to make the hash table bigger */
    int i,arrSize;
    struct s_x4 array;
    array.size = arrSize = x4a->size*2;
    array.count = x4a->count;
    array.tbl = (x4node*)calloc(arrSize, sizeof(x4node) + sizeof(x4node*));
    if( array.tbl==0 ) return 0;  /* Fail due to malloc failure */
    array.ht = (x4node**)&(array.tbl[arrSize]);
    for(i=0; i<arrSize; i++) array.ht[i] = 0;
    for(i=0; i<x4a->count; i++){
      x4node *oldnp, *newnp;
      oldnp = &(x4a->tbl[i]);
      h = confighash(oldnp->data) & (arrSize-1);
      newnp = &(array.tbl[i]);
      if( array.ht[h] ) array.ht[h]->from = &(newnp->next);
      newnp->next = array.ht[h];
      newnp->data = oldnp->data;
      newnp->from = &(array.ht[h]);
      array.ht[h] = newnp;
    }
    /* free(x4a->tbl); // This code was originall written for 16-bit machines.
    ** on modern machines, don't worry about freeing this trival amount of
    ** memory. */
    *x4a = array;
  }
  /* Insert the new data */
  h = ph & (x4a->size-1);
  np = &(x4a->tbl[x4a->count++]);
  np->data = data;
  if( x4a->ht[h] ) x4a->ht[h]->from = &(np->next);
  np->next = x4a->ht[h];
  x4a->ht[h] = np;
  np->from = &(x4a->ht[h]);
  return 1;
}

/* Return a pointer to data assigned to the given key.  Return NULL
** if no such key. */
struct config *Configtable_find(struct config *key)
{
  int h;
  x4node *np;

  if( x4a==0 ) return 0;
  h = confighash(key) & (x4a->size-1);
  np = x4a->ht[h];
  while( np ){
    if( Configcmp((const char *) np->data,(const char *) key)==0 ) break;
    np = np->next;
  }
  return np ? np->data : 0;
}

/* Remove all data from the table.  Pass each data to the function "f"
** as it is removed.  ("f" may be null to avoid this step.) */
void Configtable_clear(int(*f)(struct config *))
{
  int i;
  if( x4a==0 || x4a->count==0 ) return;
  if( f ) for(i=0; i<x4a->count; i++) (*f)(x4a->tbl[i].data);
  for(i=0; i<x4a->size; i++) x4a->ht[i] = 0;
  x4a->count = 0;
  return;
}