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Annotation of 42BSD/usr.lib/lib2648/rdchar.c, revision 1.1.1.1

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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