UNIX 6th Ed. - /usr/source/yacc/source/y0.c

   1: # define _actsize 1500
   2: # define _memsize 3500
   3: # define _nstates 400
   4: # define _nterms 95
   5: # define _nprod 250
   6: # define _nnonterm 100
   7: # define _tempsize 400
   8: # define _cnamsz 2000
   9: # define _lsetsize 200
  10: # define _wsetsize 150
  11: 
  12: # define _tbitset 6
  13: 
  14: int tbitset;  /* size of lookahed sets */
  15: int nolook 0; /* flag to suppress lookahead computations */
  16: struct looksets { int lset[ _tbitset ]; } ;
  17: struct item { int *pitem; } ;
  18: 
  19: /* this file contains the definitions for most externally known data */
  20: 
  21: int nstate 0;       /* number of states */
  22: struct item *pstate[_nstates];  /* pointers to the descriptions of the states */
  23: int apstate[_nstates];  /* index to the actions for the states */
  24: int tystate[_nstates];  /* contains type information about the states */
  25: int stsize _nstates;    /* maximum number of states, at present */
  26: int memsiz _memsize;    /* maximum size for productions and states */
  27: int mem0[_memsize] ; /* production storage */
  28: int *mem mem0;
  29: int amem[_actsize];  /* action table storage */
  30: int actsiz _actsize; /* action table size */
  31: int memact 0;       /* next free action table position */
  32: int nprod 1;    /* number of productions */
  33: int *prdptr[_nprod];    /* pointers to descriptions of productions */
  34: int prdlim _nprod ;  /* the maximum number of productions */
  35:     /* levprd - productions levels to break conflicts */
  36: int levprd[_nprod] {0,0};
  37:   /* last two bits code associativity:
  38:        0 = no definition
  39:        1 = left associative
  40:        2 = binary
  41:        3 = right associative
  42:      bit 04 is 1 if the production has an action
  43:      the high 13 bits have the production level
  44:      */
  45: int nterms 0;   /* number of terminals */
  46: int tlim _nterms ; /* the maximum number of terminals */
  47: /*	the ascii representations of the terminals	*/
  48: int extval 0;  /* start of output values */
  49: struct sxxx1 {char *name; int value;} trmset[_nterms];
  50: char cnames[_cnamsz];
  51: int cnamsz _cnamsz;
  52: char *cnamp;
  53: int maxtmp _tempsize;   /* the size of the temp1 array */
  54: int temp1[_tempsize]; /* temporary storage, indexed by terms + nterms or states */
  55: int temp2[_nnonterm]; /* temporary storage indexed by nonterminals */
  56: int trmlev[_nterms];    /* vector with the precedence of the terminals */
  57:   /* The levels are the same as for levprd, but bit 04 is always 0 */
  58: /* the ascii representations of the nonterminals */
  59: struct sxxx2 { char *name; } nontrst[_nnonterm];
  60: int ntlim _nnonterm ; /* limit to the number of nonterminals */
  61: int indgo[_nstates];        /* index to the stored goto table */
  62: int ***pres; /* vector of pointers to the productions yielding each nonterminal */
  63: struct looksets **pfirst; /* vector of pointers to first sets for each nonterminal */
  64: int *pempty 0 ; /* table of nonterminals nontrivially deriving e */
  65: int nnonter -1; /* the number of nonterminals */
  66: int lastred 0;  /* the number of the last reduction of a state */
  67: int ftable;     /* y.tab.c file */
  68: int foutput;        /* y.output file */
  69: int arrndx; /* used in the output of arrays on y.tab.c */
  70: int zzcwset 0;
  71: int zzpairs 0;
  72: int zzgoent 0;
  73: int zzgobest 0;
  74: int zzacent 0;
  75: int zzacsave 0;
  76: int zznsave 0;
  77: int zzclose 0;
  78: int zzsrconf 0;
  79: int zzrrconf 0;
  80: char *ctokn;
  81: int lineno 1; /* current input line number */
  82: int peekc -1; /* look-ahead character */
  83: int tstates[ _nterms ]; /* states generated by terminal gotos */
  84: int ntstates[ _nnonterm ]; /* states generated by nonterminal gotos */
  85: int mstates[ _nstates ]; /* chain of overflows of term/nonterm generation lists  */
  86: 
  87: struct looksets clset;
  88: struct looksets lkst [ _lsetsize ];
  89: int nlset 0; /* next lookahead set index */
  90: int lsetsz _lsetsize; /* number of lookahead sets */
  91: 
  92: struct wset { int *pitem, flag, ws[_tbitset]; } wsets[ _wsetsize ];
  93: int cwset;
  94: int wssize _wsetsize;
  95: 
  96: int numbval;  /* the value of an input number */
  97: int rflag 0;  /* ratfor flag */
  98: int oflag 0;  /* optimization flag */
  99: 
 100: int ndefout 3;  /* number of defined symbols output */
 101: int nerrors 0;  /* number of errors */
 102: int fatfl 1;    /* if on, error is fatal */
 103: int machine;   /* has a number describing the machine */

Defined variables

Defined struct's

Defined macros