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Refactor catv. Move visible() from stty to libbb.

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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>
This commit is contained in:
Bartosz Golaszewski
2013-07-30 06:29:42 +02:00
committed by Denys Vlasenko
parent d0bc708cb5
commit 79c618c411
5 changed files with 51 additions and 58 deletions
Download Patch File Download Diff File Expand all files Collapse all files

39
coreutils/stty.c
View File

@@ -781,36 +781,6 @@ struct globals {
G.max_col = 80; \
} while (0)
/* Return a string that is the printable representation of character CH */
/* Adapted from 'cat' by Torbjorn Granlund */
static const char *visible(unsigned ch)
{
char *bpout = G.buf;
if (ch == _POSIX_VDISABLE)
return "<undef>";
if (ch >= 128) {
ch -= 128;
*bpout++ = 'M';
*bpout++ = '-';
}
if (ch < 32) {
*bpout++ = '^';
*bpout++ = ch + 64;
} else if (ch < 127) {
*bpout++ = ch;
} else {
*bpout++ = '^';
*bpout++ = '?';
}
*bpout = '\0';
return G.buf;
}
static void set_speed_or_die(enum speed_setting type, const char *arg,
struct termios *mode)
{
@@ -1038,6 +1008,7 @@ static void do_display(const struct termios *mode, int all)
#endif
for (i = 0; i != CIDX_min; ++i) {
char ch;
/* If swtch is the same as susp, don't print both */
#if VSWTCH == VSUSP
if (i == CIDX_swtch)
@@ -1051,8 +1022,12 @@ static void do_display(const struct termios *mode, int all)
continue;
}
#endif
wrapf("%s = %s;", nth_string(control_name, i),
visible(mode->c_cc[control_info[i].offset]));
ch = mode->c_cc[control_info[i].offset];
if (ch == _POSIX_VDISABLE)
strcpy(G.buf, "<undef>");
else
visible(ch, G.buf, 0);
wrapf("%s = %s;", nth_string(control_name, i), G.buf);
}
#if VEOF == VMIN
if ((mode->c_lflag & ICANON) == 0)