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Annotation of 40BSD/cmd/pxp/yyerror.c, revision 1.1

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

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