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Annotation of 42BSD/ucb/eyacc/ey.h, revision 1.1

1.1     ! root        1: /*     static  char *sccsid = "@(#)ey.h        4.2 (Berkeley) 8/30/82"; */
        !             2: /* (c) 1979 Regents of the University of California */
        !             3: #include <stdio.h>
        !             4: /*  MANIFEST CONSTANT DEFINITIONS */
        !             5: 
        !             6: # define NTBASE 010000
        !             7: 
        !             8:   /* internal codes for error and accept actions */
        !             9: 
        !            10: # define ERRCODE  8190
        !            11: # define ACCEPTCODE 8191
        !            12: 
        !            13: # define errfileno stderr      /* file number for erros and reduction message */
        !            14: # define _tbitset 6  /* 16*_tbitset - 1 >= _nterms */
        !            15: 
        !            16: extern int tbitset;  /* number of wds of lookahead vector */
        !            17: extern int nolook;  /* flag to turn off lookahed computations */
        !            18: struct looksets { int lset[ _tbitset ]; } ;
        !            19: struct item { int *pitem; struct looksets *look; } ;
        !            20: 
        !            21:   /* output actions */
        !            22: 
        !            23: # define ERRACT 4096
        !            24: # define SHIFTACT 8192
        !            25: # define REDUCACT 12288
        !            26: # define ACCEPTACT 16384
        !            27: 
        !            28: # define _REGISTER register
        !            29: 
        !            30: extern int nstate ;            /* number of states */
        !            31: extern struct item *pstate[];  /* pointers to the descriptions of the states */
        !            32: extern int apstate[];          /* index to actions in amem by state */
        !            33: extern int actsiz;     /* size of the action table array */
        !            34: extern int tystate[];  /* contains type information about the states */
        !            35:   /* 0 = simple state, completely generated
        !            36:      1 = state awaiting generation
        !            37:      2 = state with an empty production in closure 
        !            38:      */
        !            39: extern int stsize ;    /* maximum number of states, at present */
        !            40: extern int memsiz ;    /* maximum size for productions and states */
        !            41: extern int mem0[] ; /* added production */
        !            42: extern int *mem ;
        !            43: extern int amem[];  /* action table storage */
        !            44: extern int actsiz;  /* action table size */
        !            45: extern int memact ;            /* next free action table position */
        !            46: extern int nprod ;     /* number of productions */
        !            47: extern int *prdptr[];  /* pointers to descriptions of productions */
        !            48: extern int prdlim; /* the number of productions allowed */
        !            49: extern int levprd[] ;  /* contains production levels to break conflicts */
        !            50:   /* last two bits code associativity:
        !            51:        0 = no definition
        !            52:        1 = left associative
        !            53:        2 = binary
        !            54:        3 = right associative
        !            55:      bit 04 is 1 if the production has an action
        !            56:      the high 13 bits have the production level
        !            57:      */
        !            58: extern int nterms ;    /* number of terminals */
        !            59: extern int nerrors;    /* number of errors */
        !            60: extern int fatfl;      /* if on, error is fatal */
        !            61:   /*   the ascii representations of the terminals      */
        !            62: extern int extval;  /* start of output values */
        !            63: extern struct sxxx1 {char *name; int value;} trmset[];
        !            64: extern char cnames[];
        !            65: extern int cnamsz;
        !            66: extern char *cnamp;
        !            67: extern int maxtmp ;    /* the size of the temp arrays */
        !            68:  /* temporary vectors, indexable by states, terms, or nterms */
        !            69: extern int temp1[];
        !            70: extern int temp2[];
        !            71: extern int trmlev[];   /* vector with the precedence of the terminals */
        !            72:   /* The levels are the same as for levprd, but bit 04 is always 0 */
        !            73:   /* the ascii representations of the nonterminals */
        !            74: extern struct sxxx2 { char *name; } nontrst[];
        !            75: extern int indgo[];            /* index to the stored goto table */
        !            76: extern int ***pres; /* vector of pointers to the productions yielding each nonterminal */
        !            77: extern struct looksets **pfirst; /* vector of pointers to first sets for each nonterminal */
        !            78: extern char *pempty; /* table of nonterminals nontrivially deriving e */
        !            79: extern char stateflags[]; /* flags defining properties of a state (see below) */
        !            80: #define GENLAMBDA   1  /* the state can nontrivially derive lambda */
        !            81: #define SINGLE_NT   2  /* the state has a single nonterminal before its dot */
        !            82: #define NEEDSREDUCE 4  /* the state needs a full reduce state generated */
        !            83: extern struct looksets lastate[]; /* saved lookahead sets */
        !            84: extern unsigned char lookstate[]; /* index mapping states to saved lookaheads */
        !            85: extern int savedlook; /* number of saved lookahead sets used */
        !            86: extern int maxlastate; /* maximum number of saved lookahead sets */
        !            87: extern int nnonter ;   /* the number of nonterminals */
        !            88: extern int lastred ;   /* the number of the last reduction of a state */
        !            89: extern FILE *ftable;           /* y.tab.c file */
        !            90: extern FILE *foutput;          /* y.output file */
        !            91: extern FILE *cin;              /* current input file */
        !            92: extern FILE *cout;             /* current output file */
        !            93: extern int arrndx;
        !            94: extern int zzcwset;
        !            95: extern int zzpairs ;
        !            96: extern int zzgoent ;
        !            97: extern int zzgobest ;
        !            98: extern int zzacent ;
        !            99: extern int zzacsave ;
        !           100: extern int zznsave ;
        !           101: extern int zzclose ;
        !           102: extern int zzrrconf ;
        !           103: extern int zzsrconf ;
        !           104: extern char *ctokn;
        !           105: struct {int **ppi;} ;
        !           106: extern int ntlim ;     /* maximum number of nonterminals */
        !           107: extern int tlim ;      /* maximum number of terminals */
        !           108: extern int lineno; /* current line number */
        !           109: extern int peekc; /* look-ahead character */
        !           110: extern int tstates[];
        !           111: extern int ntstates[];
        !           112: extern int mstates[];
        !           113: 
        !           114: extern struct looksets clset;
        !           115: extern struct looksets lkst[];
        !           116: extern int nlset;  /* next lookahead set index */
        !           117: extern int lsetsz; /* number of lookahead sets */
        !           118: 
        !           119: extern struct wset { int *pitem, flag, ws[ _tbitset ]; } wsets[];
        !           120: extern int cwset;
        !           121: extern int wssize;
        !           122: extern int lambdarule; /* index to rule that derives lambda */
        !           123: 
        !           124: extern int numbval;  /* the value of an input number */
        !           125: extern int rflag;  /* ratfor flag */
        !           126: extern int oflag;  /* optimization flag */
        !           127: extern int ndefout;  /* number of defined symbols output */
        !           128: 
        !           129: extern int machine;
        !           130: 
        !           131: # define UNIX 1
        !           132: # define GCOS 2
        !           133: # define IBM 3
        !           134: 
        !           135: struct looksets *flset();

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