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Annotation of 43BSD/usr.lib/lib2648/rdchar.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[] = "@(#)rdchar.c   5.1 (Berkeley) 4/26/85";
        !             9: #endif not lint
        !            10: 
        !            11: /*
        !            12:  * rdchar: returns a readable representation of an ASCII char, using ^ notation.
        !            13:  */
        !            14: 
        !            15: #include <ctype.h>
        !            16: 
        !            17: char *rdchar(c)
        !            18: char c;
        !            19: {
        !            20:        static char ret[4];
        !            21:        register char *p;
        !            22: 
        !            23:        /*
        !            24:         * Due to a bug in isprint, this prints spaces as ^`, but this is OK
        !            25:         * because we want something to show up on the screen.
        !            26:         */
        !            27:        ret[0] = ((c&0377) > 0177) ? '\'' : ' ';
        !            28:        c &= 0177;
        !            29:        ret[1] = isprint(c) ? ' ' : '^';
        !            30:        ret[2] = isprint(c) ?  c  : c^0100;
        !            31:        ret[3] = 0;
        !            32:        for (p=ret; *p==' '; p++)
        !            33:                ;
        !            34:        return (p);
        !            35: }

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