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midx: drop unused parameters from add_midx_to_chain()

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When loading a chained midx, we build up an array of hashes, one per
layer of the chain. But since the chain is also represented by the
linked list of multi_pack_index structs, nobody actually reads this
array. We pass it to add_midx_to_chain(), but the parameters are
completely ignored.

So we can drop those unused parameters. And then we can see that its
sole caller, load_midx_chain_fd_st(), only cares about one layer hash at a
time (for parsing each line and feeding it to the single-layer midx
code). So we can replace the array with a single object_id on the stack.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jeff King
2024-08-13 01:02:16 -04:00
committed by Junio C Hamano
parent fcb2205b77
commit 1784522a1f
1 changed files with 5 additions and 9 deletions
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14
midx.c
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@ -264,9 +264,7 @@ static int open_multi_pack_index_chain(const char *chain_file,
}
static int add_midx_to_chain(struct multi_pack_index *midx,
struct multi_pack_index *midx_chain,
struct object_id *oids,
int n)
struct multi_pack_index *midx_chain)
{
if (midx_chain) {
if (unsigned_add_overflows(midx_chain->num_packs,
@ -300,21 +298,20 @@ static struct multi_pack_index *load_midx_chain_fd_st(const char *object_dir,
{
struct multi_pack_index *midx_chain = NULL;
struct strbuf buf = STRBUF_INIT;
struct object_id *layers = NULL;
int valid = 1;
uint32_t i, count;
FILE *fp = xfdopen(fd, "r");
count = st->st_size / (the_hash_algo->hexsz + 1);
CALLOC_ARRAY(layers, count);
for (i = 0; i < count; i++) {
struct multi_pack_index *m;
struct object_id layer;
if (strbuf_getline_lf(&buf, fp) == EOF)
break;
if (get_oid_hex(buf.buf, &layers[i])) {
if (get_oid_hex(buf.buf, &layer)) {
warning(_("invalid multi-pack-index chain: line '%s' "
"not a hash"),
buf.buf);
@ -325,12 +322,12 @@ static struct multi_pack_index *load_midx_chain_fd_st(const char *object_dir,
valid = 0;
strbuf_reset(&buf);
get_split_midx_filename_ext(&buf, object_dir, layers[i].hash,
get_split_midx_filename_ext(&buf, object_dir, layer.hash,
MIDX_EXT_MIDX);
m = load_multi_pack_index_one(object_dir, buf.buf, local);
if (m) {
if (add_midx_to_chain(m, midx_chain, layers, i)) {
if (add_midx_to_chain(m, midx_chain)) {
midx_chain = m;
valid = 1;
} else {
@ -343,7 +340,6 @@ static struct multi_pack_index *load_midx_chain_fd_st(const char *object_dir,
}
}
free(layers);
fclose(fp);
strbuf_release(&buf);