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ref-cache: use 'size_t' instead of int for length

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The commit 090eb5336c (refs: selectively set prefix in the seek
functions, 2025-07-15) modified the ref-cache iterator to support
seeking to a specified marker without setting the prefix.

The commit adds and uses an integer 'len' to capture the length of the
seek marker to compare with the entries of a given directory. Since the
type of the variable is 'int', this is met with a typecast of converting
a `strlen` to 'int' so it can be assigned to the 'len' variable.

This is whole operation is a bit wrong:
1. Since the 'len' variable is eventually used in a 'strncmp', it should
have been of type 'size_t'.
2. This also truncates the value provided from 'strlen' to an int, which
could cause a large refname to produce a negative number.

Let's do the correct thing here and simply use 'size_t' for `len`.

Signed-off-by: Karthik Nayak <karthik.188@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Karthik Nayak
2025-07-28 22:20:46 +02:00
committed by Junio C Hamano
parent 9201261a70
commit 65855751d1
1 changed files with 3 additions and 2 deletions
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5
refs/ref-cache.c
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@@ -498,13 +498,14 @@ static int cache_ref_iterator_seek(struct ref_iterator *ref_iterator,
* indexing to each level as needed.
*/
do {
int len, idx;
int idx;
size_t len;
int cmp = 0;
sort_ref_dir(dir);
slash = strchr(slash, '/');
len = slash ? slash - refname : (int)strlen(refname);
len = slash ? (size_t)(slash - refname) : strlen(refname);
for (idx = 0; idx < dir->nr; idx++) {
cmp = strncmp(refname, dir->entries[idx]->name, len);