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object-file.c: use "enum" return type for unpack_loose_header()

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In a preceding commit we changed and documented unpack_loose_header()
from its previous behavior of returning any negative value or zero, to
only -1 or 0.

Let's add an "enum unpack_loose_header_result" type and use it for
these return values, and have the compiler assert that we're
exhaustively covering all of them.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Ævar Arnfjörð Bjarmason
2021-10-01 11:16:49 +02:00
committed by Junio C Hamano
parent 01cab97679
commit 3b6a8db3b0
3 changed files with 49 additions and 27 deletions
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23
streaming.c
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@ -229,17 +229,16 @@ static int open_istream_loose(struct git_istream *st, struct repository *r,
st->u.loose.mapped = map_loose_object(r, oid, &st->u.loose.mapsize);
if (!st->u.loose.mapped)
return -1;
if ((unpack_loose_header(&st->z,
st->u.loose.mapped,
st->u.loose.mapsize,
st->u.loose.hdr,
sizeof(st->u.loose.hdr),
NULL) < 0) ||
(parse_loose_header(st->u.loose.hdr, &oi, 0) < 0)) {
git_inflate_end(&st->z);
munmap(st->u.loose.mapped, st->u.loose.mapsize);
return -1;
switch (unpack_loose_header(&st->z, st->u.loose.mapped,
st->u.loose.mapsize, st->u.loose.hdr,
sizeof(st->u.loose.hdr), NULL)) {
case ULHR_OK:
break;
case ULHR_BAD:
goto error;
}
if (parse_loose_header(st->u.loose.hdr, &oi, 0) < 0)
goto error;
st->u.loose.hdr_used = strlen(st->u.loose.hdr) + 1;
st->u.loose.hdr_avail = st->z.total_out;
@ -248,6 +247,10 @@ static int open_istream_loose(struct git_istream *st, struct repository *r,
st->read = read_istream_loose;
return 0;
error:
git_inflate_end(&st->z);
munmap(st->u.loose.mapped, st->u.loose.mapsize);
return -1;
}