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builtin-grep: support -c (--count).

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Signed-off-by: Junio C Hamano <junkio@cox.net>
This commit is contained in:
Junio C Hamano 2006-05-02 15:40:49 -07:00
parent f9b9faf6f8
commit 2c866cf1c2
1 changed files with 20 additions and 1 deletions
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21
builtin-grep.c
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@ -88,6 +88,7 @@ struct grep_opt {
unsigned linenum:1;
unsigned invert:1;
unsigned name_only:1;
unsigned count:1;
int regflags;
unsigned pre_context;
unsigned post_context;
@ -149,6 +150,7 @@ static int grep_buffer(struct grep_opt *opt, const char *name,
unsigned last_hit = 0;
unsigned last_shown = 0;
const char *hunk_mark = "";
unsigned count = 0;
if (opt->pre_context)
prev = xcalloc(opt->pre_context, sizeof(*prev));
@ -179,12 +181,16 @@ static int grep_buffer(struct grep_opt *opt, const char *name,
if (opt->invert)
hit = !hit;
if (hit) {
count++;
if (opt->name_only) {
printf("%s\n", name);
return 1;
}
/* Hit at this line. If we haven't shown the
* pre-context lines, we would need to show them.
* When asked to do "count", this still show
* the context which is nonsense, but the user
* deserves to get that ;-).
*/
if (opt->pre_context) {
unsigned from;
@ -206,7 +212,8 @@ static int grep_buffer(struct grep_opt *opt, const char *name,
}
if (last_shown && lno != last_shown + 1)
printf(hunk_mark);
show_line(opt, bol, eol, name, lno, ':');
if (!opt->count)
show_line(opt, bol, eol, name, lno, ':');
last_shown = last_hit = lno;
}
else if (last_hit &&
@ -230,6 +237,13 @@ static int grep_buffer(struct grep_opt *opt, const char *name,
left--;
lno++;
}
/* NEEDSWORK:
* The real "grep -c foo *.c" gives many "bar.c:0" lines,
* which feels mostly useless but sometimes useful. Maybe
* make it another option? For now suppress them.
*/
if (opt->count && count)
printf("%s:%u\n", name, count);
return !!last_hit;
}
@ -442,6 +456,11 @@ int cmd_grep(int argc, const char **argv, char **envp)
opt.name_only = 1;
continue;
}
if (!strcmp("-c", arg) ||
!strcmp("--count", arg)) {
opt.count = 1;
continue;
}
if (!strncmp("-A", arg, 2) ||
!strncmp("-B", arg, 2) ||
!strncmp("-C", arg, 2) ||