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avoid asking ?alloc() for zero bytes.

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Avoid asking for zero bytes when that change simplifies overall
logic.  Later we would change the wrapper to ask for 1 byte on
platforms that return NULL for zero byte request.

Signed-off-by: Junio C Hamano <junkio@cox.net>
This commit is contained in:
Junio C Hamano
2005-12-26 12:34:56 -08:00
parent 7d6fb370bc
commit 7e4a2a8483
6 changed files with 39 additions and 19 deletions
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22
index-pack.c
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@ -352,18 +352,24 @@ static int sha1_compare(const void *_a, const void *_b)
static void write_index_file(const char *index_name, unsigned char *sha1)
{
struct sha1file *f;
struct object_entry **sorted_by_sha =
xcalloc(nr_objects, sizeof(struct object_entry *));
struct object_entry **list = sorted_by_sha;
struct object_entry **last = sorted_by_sha + nr_objects;
struct object_entry **sorted_by_sha, **list, **last;
unsigned int array[256];
int i;
SHA_CTX ctx;
for (i = 0; i < nr_objects; ++i)
sorted_by_sha[i] = &objects[i];
qsort(sorted_by_sha, nr_objects, sizeof(sorted_by_sha[0]),
sha1_compare);
if (nr_objects) {
sorted_by_sha =
xcalloc(nr_objects, sizeof(struct object_entry *));
list = sorted_by_sha;
last = sorted_by_sha + nr_objects;
for (i = 0; i < nr_objects; ++i)
sorted_by_sha[i] = &objects[i];
qsort(sorted_by_sha, nr_objects, sizeof(sorted_by_sha[0]),
sha1_compare);
}
else
sorted_by_sha = list = last = NULL;
unlink(index_name);
f = sha1create("%s", index_name);