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Annotation of 42BSD/ucb/pascal/pxp/yyerror.c, revision 1.1

1.1     ! root        1: static char *sccsid = "@(#)yyerror.c   1.2 (Berkeley) 5/11/83";
        !             2: /* Copyright (c) 1979 Regents of the University of California */
        !             3: /*
        !             4:  * pi - Pascal interpreter code translator
        !             5:  *
        !             6:  * Charles Haley, Bill Joy UCB
        !             7:  * Version 1.2 January 1979
        !             8:  *
        !             9:  *
        !            10:  * pxp - Pascal execution profiler
        !            11:  *
        !            12:  * Bill Joy UCB
        !            13:  * Version 1.2 January 1979
        !            14:  */
        !            15: 
        !            16: #include "whoami.h"
        !            17: #include "0.h"
        !            18: #include "yy.h"
        !            19: 
        !            20: /*
        !            21:  * Yerror prints an error
        !            22:  * message and then returns
        !            23:  * NIL for the tree if needed.
        !            24:  * The error is flagged on the
        !            25:  * current line which is printed
        !            26:  * if the listing is turned off.
        !            27: #ifdef PXP
        !            28:  *
        !            29:  * As is obvious from the fooling around
        !            30:  * with fout below, the Pascal system should
        !            31:  * be changed to use the new library "lS".
        !            32: #endif
        !            33:  */
        !            34: yerror(s, a1, a2, a3, a4, a5)
        !            35:        char *s;
        !            36: {
        !            37: #ifdef PI
        !            38:        char buf[256];
        !            39: #endif
        !            40:        register int i, j;
        !            41:        static yySerrs;
        !            42: #ifdef PXP
        !            43: /*
        !            44:        int ofout;
        !            45: */
        !            46: #endif
        !            47: 
        !            48:        if (errpfx == 'w' && opt('w') != 0)
        !            49:                return;
        !            50: #ifdef PXP
        !            51: /*
        !            52:        flush();
        !            53:        ofout = fout[0];
        !            54:        fout[0] = errout;
        !            55: */
        !            56: #endif
        !            57:        yyResume = 0;
        !            58: #ifdef PI
        !            59:        geterr(s, buf);
        !            60:        s = buf;
        !            61: #endif
        !            62:        yysync();
        !            63:        putc(errpfx, stderr);
        !            64:        putc(' ', stderr);
        !            65:        for (i = 3; i < yyecol; i++)
        !            66:                putc('-', stderr);
        !            67:        fprintf(stderr, "^--- ");
        !            68: /*
        !            69:        if (yyecol > 60)
        !            70:                printf("\n\t");
        !            71: */
        !            72:        fprintf(stderr, s, a1, a2, a3, a4, a5);
        !            73:        putc('\n', stderr);
        !            74:        if (errpfx == 'E')
        !            75: #ifdef PI
        !            76:                eflg++, cgenflg++;
        !            77: #endif
        !            78: #ifdef PXP
        !            79:                eflg++;
        !            80: #endif
        !            81:        errpfx = 'E';
        !            82:        yySerrs++;
        !            83:        if (yySerrs >= MAXSYNERR) {
        !            84:                yySerrs = 0;
        !            85:                yerror("Too many syntax errors - QUIT");
        !            86:                pexit(ERRS);
        !            87:        }
        !            88: #ifdef PXP
        !            89: /*
        !            90:        flush();
        !            91:        fout[0] = ofout;
        !            92: */
        !            93:        return (0);
        !            94: #endif
        !            95: }
        !            96: 
        !            97: /*
        !            98:  * A bracketing error message
        !            99:  */
        !           100: brerror(where, what)
        !           101:        int where;
        !           102:        char *what;
        !           103: {
        !           104: 
        !           105:        if (where == 0) {
        !           106:                line = yyeline;
        !           107:                setpfx(' ');
        !           108:                error("End matched %s on line %d", what, where);
        !           109:                return;
        !           110:        }
        !           111:        if (where < 0)
        !           112:                where = -where;
        !           113:        yerror("Inserted keyword end matching %s on line %d", what, where);
        !           114: }

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