| 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) %G%"; |
| 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 | } |