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Annotation of 43BSDTahoe/ucb/pascal/src/yyerror.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1980 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: 
        !             7: #ifndef lint
        !             8: static char sccsid[] = "@(#)yyerror.c  5.2 (Berkeley) 5/6/86";
        !             9: #endif not lint
        !            10: 
        !            11: #include "whoami.h"
        !            12: #include "0.h"
        !            13: #include "tree_ty.h"   /* must be included for yy.h */
        !            14: #include "yy.h"
        !            15: 
        !            16: /*
        !            17:  * Yerror prints an error
        !            18:  * message and then returns
        !            19:  * NIL for the tree if needed.
        !            20:  * The error is flagged on the
        !            21:  * current line which is printed
        !            22:  * if the listing is turned off.
        !            23: #ifdef PXP
        !            24:  *
        !            25:  * As is obvious from the fooling around
        !            26:  * with fout below, the Pascal system should
        !            27:  * be changed to use the new library "lS".
        !            28: #endif
        !            29:  */
        !            30: /*VARARGS*/
        !            31: yerror(s, a1, a2, a3, a4, a5)
        !            32:        char *s;
        !            33:        char *a1, *a2, *a3, *a4, *a5;
        !            34: {
        !            35: #ifdef PI
        !            36:        char buf[256];
        !            37: #endif
        !            38:        register int i;
        !            39:        static yySerrs;
        !            40: #ifdef PXP
        !            41:        int ofout;
        !            42: #endif
        !            43: 
        !            44:        if (errpfx == 'w' && opt('w') != 0) {
        !            45:                errpfx = 'E';
        !            46:                return;
        !            47:        }
        !            48:        /* no continuations allowed here */
        !            49:        if (errpfx == ' ')
        !            50:                errpfx = 'E';
        !            51: #ifdef PXP
        !            52:        flush();
        !            53:        ofout = fout[0];
        !            54:        fout[0] = errout;
        !            55: #endif
        !            56:        yyResume = 0;
        !            57: #ifdef PI
        !            58:        geterr((int) s, buf);
        !            59:        s = buf;
        !            60: #endif
        !            61:        yysync();
        !            62:        pchr(errpfx);
        !            63:        pchr(' ');
        !            64:        for (i = 3; i < yyecol; i++)
        !            65:                pchr('-');
        !            66:        printf("^--- ");
        !            67: /*
        !            68:        if (yyecol > 60)
        !            69:                printf("\n\t");
        !            70: */
        !            71:        printf(s, a1, a2, a3, a4, a5);
        !            72:        pchr('\n');
        !            73:        if (errpfx == 'E')
        !            74: #ifdef PI
        !            75:                eflg = TRUE, codeoff();
        !            76: #endif
        !            77: #ifdef PXP
        !            78:                eflg = TRUE;
        !            79: #endif
        !            80:        errpfx = 'E';
        !            81:        yySerrs++;
        !            82:        if (yySerrs >= MAXSYNERR) {
        !            83:                yySerrs = 0;
        !            84:                yerror("Too many syntax errors - QUIT");
        !            85:                pexit(ERRS);
        !            86:        }
        !            87: #ifdef PXP
        !            88:        flush();
        !            89:        fout[0] = ofout;
        !            90:        return (0);
        !            91: #endif
        !            92: }
        !            93: 
        !            94: /*
        !            95:  * A bracketing error message
        !            96:  */
        !            97: brerror(where, what)
        !            98:        int where;
        !            99:        char *what;
        !           100: {
        !           101: 
        !           102:        if (where == 0) {
        !           103:                line = yyeline;
        !           104:                setpfx(' ');
        !           105:                error("End matched %s on line %d", what, (char *) where);
        !           106:                return;
        !           107:        }
        !           108:        if (where < 0)
        !           109:                where = -where;
        !           110:        yerror("Inserted keyword end matching %s on line %d", what, (char *) where);
        !           111: }

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