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Annotation of 43BSD/ucb/pascal/eyacc/ey.h, revision 1.1

1.1     ! root        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();

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