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Make use of the tree cache

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Taking advantage of the tree cache, git_tree_create_fromindex becomes
comparable in speed to git write-tree when the cache is available.

Signed-off-by: Carlos Martín Nieto <carlos@cmartin.tk>
This commit is contained in:
Carlos Martín Nieto 2011-09-24 17:06:52 +02:00 committed by Vicent Marti
parent 3ba69ba8a4
commit 8255c69b10
1 changed files with 30 additions and 0 deletions
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30
src/tree.c
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@ -204,12 +204,37 @@ int git_tree__parse(git_tree *tree, git_odb_object *obj)
return tree_parse_buffer(tree, (char *)obj->raw.data, (char *)obj->raw.data + obj->raw.len);
}
static unsigned int find_next_dir(const char *dirname, git_index *index, unsigned int start)
{
unsigned int i, entries = git_index_entrycount(index);
size_t dirlen;
dirlen = strlen(dirname);
for (i = start; i < entries; ++i) {
git_index_entry *entry = git_index_get(index, i);
if (strlen(entry->path) < dirlen ||
memcmp(entry->path, dirname, dirlen) ||
(dirlen > 0 && entry->path[dirlen] != '/')) {
break;
}
}
return i;
}
static int write_tree(git_oid *oid, git_index *index, const char *dirname, unsigned int start)
{
git_treebuilder *bld = NULL;
unsigned int i, entries = git_index_entrycount(index);
int error;
size_t dirname_len = strlen(dirname);
const git_tree_cache *cache;
cache = git_tree_cache_get(index->tree, dirname);
if (cache != NULL && cache->entries >= 0){
git_oid_cpy(oid, &cache->oid);
return find_next_dir(dirname, index, start);
}
error = git_treebuilder_create(&bld, NULL);
if (bld == NULL) {
@ -308,6 +333,11 @@ int git_tree_create_fromindex(git_oid *oid, git_index *index)
if (index->repository == NULL)
return git__throw(GIT_EBAREINDEX, "Failed to create tree. The index file is not backed up by an existing repository");
if (index->tree != NULL && index->tree->entries >= 0) {
git_oid_cpy(oid, &index->tree->oid);
return GIT_SUCCESS;
}
/* The tree cache didn't help us */
error = write_tree(oid, index, "", 0);
return (error < GIT_SUCCESS) ? git__rethrow(error, "Failed to create tree") : GIT_SUCCESS;