4.3BSD - /usr/src/ucb/pascal/eyacc/ey.h

   1: /*
   2:  * Copyright (c) 1979 Regents of the University of California.
   3:  * All rights reserved.  The Berkeley software License Agreement
   4:  * specifies the terms and conditions for redistribution.
   5:  *
   6:  *	@(#)ey.h	5.1 (Berkeley) 4/29/85
   7:  */
   8: 
   9: #include <stdio.h>
  10: /*  MANIFEST CONSTANT DEFINITIONS */
  11: 
  12: # define NTBASE 010000
  13: 
  14:   /* internal codes for error and accept actions */
  15: 
  16: # define ERRCODE  8190
  17: # define ACCEPTCODE 8191
  18: 
  19: # define errfileno stderr      /* file number for erros and reduction message */
  20: # define _tbitset 6  /* 16*_tbitset - 1 >= _nterms */
  21: 
  22: extern int tbitset;  /* number of wds of lookahead vector */
  23: extern int nolook;  /* flag to turn off lookahed computations */
  24: struct looksets { int lset[ _tbitset ]; } ;
  25: struct item { int *pitem; struct looksets *look; } ;
  26: 
  27:   /* output actions */
  28: 
  29: # define ERRACT 4096
  30: # define SHIFTACT 8192
  31: # define REDUCACT 12288
  32: # define ACCEPTACT 16384
  33: 
  34: # define _REGISTER register
  35: 
  36: extern int nstate ;     /* number of states */
  37: extern struct item *pstate[];   /* pointers to the descriptions of the states */
  38: extern int apstate[];       /* index to actions in amem by state */
  39: extern int actsiz;      /* size of the action table array */
  40: extern int tystate[];   /* contains type information about the states */
  41:   /* 0 = simple state, completely generated
  42:      1 = state awaiting generation
  43:      2 = state with an empty production in closure
  44:      */
  45: extern int stsize ; /* maximum number of states, at present */
  46: extern int memsiz ; /* maximum size for productions and states */
  47: extern int mem0[] ; /* added production */
  48: extern int *mem ;
  49: extern int amem[];  /* action table storage */
  50: extern int actsiz;  /* action table size */
  51: extern int memact ;     /* next free action table position */
  52: extern int nprod ;  /* number of productions */
  53: extern int *prdptr[];   /* pointers to descriptions of productions */
  54: extern int prdlim; /* the number of productions allowed */
  55: extern int levprd[] ;   /* contains production levels to break conflicts */
  56:   /* last two bits code associativity:
  57:        0 = no definition
  58:        1 = left associative
  59:        2 = binary
  60:        3 = right associative
  61:      bit 04 is 1 if the production has an action
  62:      the high 13 bits have the production level
  63:      */
  64: extern int nterms ; /* number of terminals */
  65: extern int nerrors; /* number of errors */
  66: extern int fatfl;   /* if on, error is fatal */
  67:   /*	the ascii representations of the terminals	*/
  68: extern int extval;  /* start of output values */
  69: extern struct sxxx1 {char *name; int value;} trmset[];
  70: extern char cnames[];
  71: extern int cnamsz;
  72: extern char *cnamp;
  73: extern int maxtmp ; /* the size of the temp arrays */
  74:  /* temporary vectors, indexable by states, terms, or nterms */
  75: extern int temp1[];
  76: extern int temp2[];
  77: extern int trmlev[];    /* vector with the precedence of the terminals */
  78:   /* The levels are the same as for levprd, but bit 04 is always 0 */
  79:   /* the ascii representations of the nonterminals */
  80: extern struct sxxx2 { char *name; } nontrst[];
  81: extern int indgo[];     /* index to the stored goto table */
  82: extern int ***pres; /* vector of pointers to the productions yielding each nonterminal */
  83: extern struct looksets **pfirst; /* vector of pointers to first sets for each nonterminal */
  84: extern char *pempty; /* table of nonterminals nontrivially deriving e */
  85: extern char stateflags[]; /* flags defining properties of a state (see below) */
  86: #define GENLAMBDA   1   /* the state can nontrivially derive lambda */
  87: #define SINGLE_NT   2   /* the state has a single nonterminal before its dot */
  88: #define NEEDSREDUCE 4   /* the state needs a full reduce state generated */
  89: extern struct looksets lastate[]; /* saved lookahead sets */
  90: extern unsigned char lookstate[]; /* index mapping states to saved lookaheads */
  91: extern int savedlook; /* number of saved lookahead sets used */
  92: extern int maxlastate; /* maximum number of saved lookahead sets */
  93: extern int nnonter ;    /* the number of nonterminals */
  94: extern int lastred ;    /* the number of the last reduction of a state */
  95: extern FILE *ftable;        /* y.tab.c file */
  96: extern FILE *foutput;       /* y.output file */
  97: extern FILE *cin;       /* current input file */
  98: extern FILE *cout;      /* current output file */
  99: extern int arrndx;
 100: extern int zzcwset;
 101: extern int zzpairs ;
 102: extern int zzgoent ;
 103: extern int zzgobest ;
 104: extern int zzacent ;
 105: extern int zzacsave ;
 106: extern int zznsave ;
 107: extern int zzclose ;
 108: extern int zzrrconf ;
 109: extern int zzsrconf ;
 110: extern char *ctokn;
 111: struct {int **ppi;} ;
 112: extern int ntlim ;  /* maximum number of nonterminals */
 113: extern int tlim ;   /* maximum number of terminals */
 114: extern int lineno; /* current line number */
 115: extern int peekc; /* look-ahead character */
 116: extern int tstates[];
 117: extern int ntstates[];
 118: extern int mstates[];
 119: 
 120: extern struct looksets clset;
 121: extern struct looksets lkst[];
 122: extern int nlset;  /* next lookahead set index */
 123: extern int lsetsz; /* number of lookahead sets */
 124: 
 125: extern struct wset { int *pitem, flag, ws[ _tbitset ]; } wsets[];
 126: extern int cwset;
 127: extern int wssize;
 128: extern int lambdarule; /* index to rule that derives lambda */
 129: 
 130: extern int numbval;  /* the value of an input number */
 131: extern int rflag;  /* ratfor flag */
 132: extern int oflag;  /* optimization flag */
 133: extern int ndefout;  /* number of defined symbols output */
 134: 
 135: extern int machine;
 136: 
 137: # define UNIX 1
 138: # define GCOS 2
 139: # define IBM 3
 140: 
 141: struct looksets *flset();

Defined struct's

Defined macros

Usage of this include