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sort_in_topological_order(): avoid setting a commit flag

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We used to set the TOPOSORT flag of commits during the topological
sorting, but we can just as well use the member "indegree" for it:
indegree is now incremented by 1 in the cases where the commit used
to have the TOPOSORT flag.

This is the same behavior as before, since indegree could not be
non-zero when TOPOSORT was unset.

Incidentally, this fixes the bug in show-branch where the 8th column
was not shown: show-branch sorts the commits in topological order,
assuming that all the commit flags are available for show-branch's
private matters.

But this was not true: TOPOSORT was identical to the flag corresponding
to the 8th ref.  So the flags for the 8th column were unset by the
topological sorting.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Johannes Schindelin
2008-07-23 01:51:36 +01:00
committed by Junio C Hamano
parent b1264da863
commit 11ee57bc4c
3 changed files with 65 additions and 8 deletions
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13
commit.c
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@ -428,8 +428,7 @@ void sort_in_topological_order(struct commit_list ** list, int lifo)
/* Mark them and clear the indegree */
for (next = orig; next; next = next->next) {
struct commit *commit = next->item;
commit->object.flags |= TOPOSORT;
commit->indegree = 0;
commit->indegree = 1;
}
/* update the indegree */
@ -438,7 +437,7 @@ void sort_in_topological_order(struct commit_list ** list, int lifo)
while (parents) {
struct commit *parent = parents->item;
if (parent->object.flags & TOPOSORT)
if (parent->indegree)
parent->indegree++;
parents = parents->next;
}
@ -456,7 +455,7 @@ void sort_in_topological_order(struct commit_list ** list, int lifo)
for (next = orig; next; next = next->next) {
struct commit *commit = next->item;
if (!commit->indegree)
if (commit->indegree == 1)
insert = &commit_list_insert(commit, insert)->next;
}
@ -478,7 +477,7 @@ void sort_in_topological_order(struct commit_list ** list, int lifo)
for (parents = commit->parents; parents ; parents = parents->next) {
struct commit *parent=parents->item;
if (!(parent->object.flags & TOPOSORT))
if (!parent->indegree)
continue;
/*
@ -486,7 +485,7 @@ void sort_in_topological_order(struct commit_list ** list, int lifo)
* when all their children have been emitted thereby
* guaranteeing topological order.
*/
if (!--parent->indegree) {
if (--parent->indegree == 1) {
if (!lifo)
insert_by_date(parent, &work);
else
@ -497,7 +496,7 @@ void sort_in_topological_order(struct commit_list ** list, int lifo)
* work_item is a commit all of whose children
* have already been emitted. we can emit it now.
*/
commit->object.flags &= ~TOPOSORT;
commit->indegree = 0;
*pptr = work_item;
pptr = &work_item->next;
}