| 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 | } |