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revision: --skip=<n>

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This adds --skip=<n> option to revision traversal machinery.
Documentation and test were added by Robert Fitzsimons.

Signed-off-by: Robert Fitzsimons <robfitz@273k.net>
Signed-off-by: Junio C Hamano <junkio@cox.net>
This commit is contained in:
Junio C Hamano
2006-12-19 18:25:32 -08:00
parent 54851157ac
commit d5db6c9ee7
4 changed files with 89 additions and 14 deletions
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46
revision.c
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@ -523,6 +523,7 @@ void init_revisions(struct rev_info *revs, const char *prefix)
revs->prefix = prefix;
revs->max_age = -1;
revs->min_age = -1;
revs->skip_count = -1;
revs->max_count = -1;
revs->prune_fn = NULL;
@ -759,6 +760,10 @@ int setup_revisions(int argc, const char **argv, struct rev_info *revs, const ch
revs->max_count = atoi(arg + 12);
continue;
}
if (!strncmp(arg, "--skip=", 7)) {
revs->skip_count = atoi(arg + 7);
continue;
}
/* accept -<digit>, like traditional "head" */
if ((*arg == '-') && isdigit(arg[1])) {
revs->max_count = atoi(arg + 1);
@ -1122,23 +1127,11 @@ static int commit_match(struct commit *commit, struct rev_info *opt)
commit->buffer, strlen(commit->buffer));
}
struct commit *get_revision(struct rev_info *revs)
static struct commit *get_revision_1(struct rev_info *revs)
{
struct commit_list *list = revs->commits;
if (!list)
if (!revs->commits)
return NULL;
/* Check the max_count ... */
switch (revs->max_count) {
case -1:
break;
case 0:
return NULL;
default:
revs->max_count--;
}
do {
struct commit_list *entry = revs->commits;
struct commit *commit = entry->item;
@ -1205,3 +1198,28 @@ struct commit *get_revision(struct rev_info *revs)
} while (revs->commits);
return NULL;
}
struct commit *get_revision(struct rev_info *revs)
{
struct commit *c = NULL;
if (0 < revs->skip_count) {
while ((c = get_revision_1(revs)) != NULL) {
if (revs->skip_count-- <= 0)
break;
}
}
/* Check the max_count ... */
switch (revs->max_count) {
case -1:
break;
case 0:
return NULL;
default:
revs->max_count--;
}
if (c)
return c;
return get_revision_1(revs);
}