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Annotation of 43BSDReno/old/lib2648/rdchar.c, revision 1.1.1.1

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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