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Annotation of 42BSD/usr.lib/lib2648/rdchar.c, revision 1.1

1.1     ! root        1: /*     rdchar.c        4.1     83/03/09        */
        !             2: /*
        !             3:  * rdchar: returns a readable representation of an ASCII char, using ^ notation.
        !             4:  */
        !             5: 
        !             6: #include <ctype.h>
        !             7: 
        !             8: char *rdchar(c)
        !             9: char c;
        !            10: {
        !            11:        static char ret[4];
        !            12:        register char *p;
        !            13: 
        !            14:        /*
        !            15:         * Due to a bug in isprint, this prints spaces as ^`, but this is OK
        !            16:         * because we want something to show up on the screen.
        !            17:         */
        !            18:        ret[0] = ((c&0377) > 0177) ? '\'' : ' ';
        !            19:        c &= 0177;
        !            20:        ret[1] = isprint(c) ? ' ' : '^';
        !            21:        ret[2] = isprint(c) ?  c  : c^0100;
        !            22:        ret[3] = 0;
        !            23:        for (p=ret; *p==' '; p++)
        !            24:                ;
        !            25:        return (p);
        !            26: }

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