diff options
| author | Bartosz Golaszewski | 2013-07-30 06:29:42 +0200 |
|---|---|---|
| committer | Denys Vlasenko | 2013-07-30 06:29:42 +0200 |
| commit | 79c618c41193eaaa092cb977f06fc112155ba92b (patch) | |
| tree | 369938db46d4691ebbcc476386c7dafdac827887 /libbb/printable.c | |
| parent | d0bc708cb52693b9ed1dab495e5f99fb8e1122f7 (diff) | |
| download | busybox-79c618c41193eaaa092cb977f06fc112155ba92b.zip busybox-79c618c41193eaaa092cb977f06fc112155ba92b.tar.gz | |
Refactor catv. Move visible() from stty to libbb.
Fixes the following TODO:
stty's visible() function and catv's guts are identical. Merge them into
an appropriate libbb function.
Also makes catv behave exactly like coreutils' cat -v e.g. it'll print 'M-^I'
instead of 'M- '.
function old new delta
visible - 70 +70
do_display 431 379 -52
catv_main 306 250 -56
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 0/2 up/down: 70/-108) Total: -38 bytes
Signed-off-by: Bartosz Golaszewski <bartekgola@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'libbb/printable.c')
| -rw-r--r-- | libbb/printable.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/libbb/printable.c b/libbb/printable.c index f6ada49..9a42343 100644 --- a/libbb/printable.c +++ b/libbb/printable.c @@ -32,3 +32,27 @@ void FAST_FUNC fputc_printable(int ch, FILE *file) } fputc(ch, file); } + +void FAST_FUNC visible(unsigned ch, char *buf, int flags) +{ + if (ch == '\t' && !(flags & VISIBLE_SHOW_TABS)) { + goto raw; + } + if (ch == '\n') { + if (flags & VISIBLE_ENDLINE) + *buf++ = '$'; + } else { + if (ch >= 128) { + ch -= 128; + *buf++ = 'M'; + *buf++ = '-'; + } + if (ch < 32 || ch == 127) { + *buf++ = '^'; + ch ^= 0x40; + } + } + raw: + *buf++ = ch; + *buf = '\0'; +} |