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cache-tree: fix strbuf growth in prime_cache_tree_rec() 

Use size_t to store the original length of the strbuf tree_len, as
that's the correct type.

Don't double the allocated size of the strbuf when adding a subdirectory
name.  And the chance of the trailing slash fitting in the slack left by
strbuf_add() is very high, so stop pre-growing the strbuf at all.

Suggested-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: René Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
René Scharfe 2023-02-10 21:20:30 +01:00 committed by Junio C Hamano
parent 844ede312b
commit 93ea118bed
1 changed files with 1 additions and 2 deletions
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3
cache-tree.c
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@ -760,7 +760,7 @@ static void prime_cache_tree_rec(struct repository *r,
struct tree_desc desc;
struct name_entry entry;
int cnt;
int base_path_len = tree_path->len;
size_t base_path_len = tree_path->len;
oidcpy(&it->oid, &tree->object.oid);
@ -785,7 +785,6 @@ static void prime_cache_tree_rec(struct repository *r,
*/
if (r->index->sparse_index) {
strbuf_setlen(tree_path, base_path_len);
strbuf_grow(tree_path, base_path_len + entry.pathlen + 1);
strbuf_add(tree_path, entry.path, entry.pathlen);
strbuf_addch(tree_path, '/');
}