| Denis Vlasenko | 2796398 | 2007-12-30 20:13:39 +0000 | [diff] [blame] | 1 | /* vi: set sw=4 ts=4: */ |
| 2 | /* |
| 3 | * Utility routines. |
| 4 | * |
| 5 | * Copyright (C) 2007 Denis Vlasenko |
| 6 | * |
| 7 | * Licensed under GPL version 2, see file LICENSE in this tarball for details. |
| 8 | */ |
| 9 | |
| 10 | #include "libbb.h" |
| 11 | |
| 12 | void fputc_printable(int ch, FILE *file) |
| 13 | { |
| 14 | if ((ch & (0x80 + PRINTABLE_META)) == (0x80 + PRINTABLE_META)) { |
| 15 | fputs("M-", file); |
| 16 | ch &= 0x7f; |
| 17 | } |
| 18 | ch = (unsigned char) ch; |
| 19 | if (ch == 0x9b) { |
| 20 | /* VT100's CSI, aka Meta-ESC, is not printable on vt-100 */ |
| 21 | ch = '{'; |
| 22 | goto print_caret; |
| 23 | } |
| 24 | if (ch < ' ') { |
| 25 | ch += '@'; |
| 26 | goto print_caret; |
| 27 | } |
| 28 | if (ch == 0x7f) { |
| 29 | ch = '?'; |
| 30 | print_caret: |
| 31 | fputc('^', file); |
| 32 | } |
| 33 | fputc(ch, file); |
| 34 | } |