27963980d
Denis Vlasenko
2007-12-30
Subject
adding libbb/printable.c
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libbb/printable.c+34 -0
| @@ -0,0 +1,34 @@ | |
| + | /* vi: set sw=4 ts=4: */ |
| + | /* |
| + | * Utility routines. |
| + | * |
| + | * Copyright (C) 2007 Denis Vlasenko |
| + | * |
| + | * Licensed under GPL version 2, see file LICENSE in this tarball for details. |
| + | */ |
| + | |
| + | #include "libbb.h" |
| + | |
| + | void fputc_printable(int ch, FILE *file) |
| + | { |
| + | if ((ch & (0x80 + PRINTABLE_META)) == (0x80 + PRINTABLE_META)) { |
| + | fputs("M-", file); |
| + | ch &= 0x7f; |
| + | } |
| + | ch = (unsigned char) ch; |
| + | if (ch == 0x9b) { |
| + | /* VT100's CSI, aka Meta-ESC, is not printable on vt-100 */ |
| + | ch = '{'; |
| + | goto print_caret; |
| + | } |
| + | if (ch < ' ') { |
| + | ch += '@'; |
| + | goto print_caret; |
| + | } |
| + | if (ch == 0x7f) { |
| + | ch = '?'; |
| + | print_caret: |
| + | fputc('^', file); |
| + | } |
| + | fputc(ch, file); |
| + | } |