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Annotation of 41BSD/cmd/eyacc/ey.h, revision 1.1

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

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