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Annotation of 41BSD/cmd/pi/yyerror.c, revision 1.1

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

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