Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@xxxxxxxxx>
---
builtin/index-pack.c | 95 ++++++++++++++++++++++++++++++++++++++++++++++++++--
1 file changed, 92 insertions(+), 3 deletions(-)
diff --git a/builtin/index-pack.c b/builtin/index-pack.c
index db2370d..210b78d 100644
--- a/builtin/index-pack.c
+++ b/builtin/index-pack.c
@@ -304,6 +304,30 @@ static uintmax_t read_varint(void)
return val;
}
+static const unsigned char *read_sha1ref(void)
+{
+ unsigned int index = read_varint();
+ if (!index) {
+ static unsigned char sha1[20];
+ hashcpy(sha1, fill_and_use(20));
+ return sha1;
+ }
+ index--;
+ if (index >= nr_objects)
+ bad_object(consumed_bytes,
+ _("bad index in read_sha1ref"));
+ return sha1_table + index * 20;
+}
+
+static const unsigned char *read_dictref(struct packv4_dict *dict)
+{
+ unsigned int index = read_varint();
+ if (index >= dict->nb_entries)
+ bad_object(consumed_bytes,
+ _("bad index in read_dictref"));
+ return dict->data + dict->offsets[index];
+}
+
static void *read_data(int size)
{
const int max = sizeof(input_buffer);
@@ -484,6 +508,59 @@ static void read_and_inflate(unsigned long offset,
git_SHA1_Final(sha1, ctx);
}
+static void *unpack_commit_v4(unsigned int offset,
+ unsigned long size,
+ unsigned char *sha1)
+{
+ unsigned int nb_parents;
+ const unsigned char *committer, *author, *ident;
+ unsigned long author_time, committer_time;
+ git_SHA_CTX ctx;
+ char hdr[32];
+ int hdrlen;
+ int16_t committer_tz, author_tz;
+ struct strbuf dst;
+
+ strbuf_init(&dst, size);
+
+ strbuf_addf(&dst, "tree %s\n", sha1_to_hex(read_sha1ref()));
+ nb_parents = read_varint();
+ while (nb_parents--)
+ strbuf_addf(&dst, "parent %s\n", sha1_to_hex(read_sha1ref()));
+
+ committer_time = read_varint();
+ ident = read_dictref(name_dict);
+ committer_tz = (ident[0] << 8) | ident[1];
+ committer = ident + 2;
+
+ author_time = read_varint();
+ ident = read_dictref(name_dict);
+ author_tz = (ident[0] << 8) | ident[1];
+ author = ident + 2;
+
+ if (author_time & 1)
+ author_time = committer_time + (author_time >> 1);
+ else
+ author_time = committer_time - (author_time >> 1);
+
+ strbuf_addf(&dst,
+ "author %s %lu %+05d\n"
+ "committer %s %lu %+05d\n",
+ author, author_time, author_tz,
+ committer, committer_time, committer_tz);
+
+ if (dst.len > size)
+ bad_object(offset, _("bad commit"));
+
+ hdrlen = sprintf(hdr, "commit %lu", size) + 1;
+ git_SHA1_Init(&ctx);
+ git_SHA1_Update(&ctx, hdr, hdrlen);
+ git_SHA1_Update(&ctx, dst.buf, dst.len);
+ read_and_inflate(offset, dst.buf + dst.len, size - dst.len,
+ 0, &ctx, sha1);
+ return dst.buf;
+}
+
static void *unpack_entry_data(unsigned long offset, unsigned long size,
enum object_type type, unsigned char *sha1)
{
@@ -493,6 +570,9 @@ static void *unpack_entry_data(unsigned long offset, unsigned long size,
char hdr[32];
int hdrlen;
+ if (type == OBJ_PV4_COMMIT)
+ return unpack_commit_v4(offset, size, sha1);
+
if (!is_delta_type(type)) {
hdrlen = sprintf(hdr, "%s %lu", typename(type), size) + 1;
git_SHA1_Init(&c);
@@ -536,7 +616,13 @@ static void *unpack_raw_entry(struct object_entry *obj,
obj->idx.offset = consumed_bytes;
input_crc32 = crc32(0, NULL, 0);
- read_typesize_v2(obj);
+ if (packv4) {
+ val = read_varint();
+ obj->type = val & 15;
+ obj->size = val >> 4;
+ } else
+ read_typesize_v2(obj);
+ obj->real_type = obj->type;
switch (obj->type) {
case OBJ_REF_DELTA:
@@ -554,6 +640,10 @@ static void *unpack_raw_entry(struct object_entry *obj,
case OBJ_BLOB:
case OBJ_TAG:
break;
+
+ case OBJ_PV4_COMMIT:
+ obj->real_type = OBJ_COMMIT;
+ break;
default:
bad_object(obj->idx.offset, _("unknown object type %d"), obj->type);
}
@@ -1092,7 +1182,6 @@ static void parse_pack_objects(unsigned char *sha1)
for (i = 0; i < nr_objects; i++) {
struct object_entry *obj = &objects[i];
void *data = unpack_raw_entry(obj, &delta->base, obj->idx.sha1);
- obj->real_type = obj->type;
if (is_delta_type(obj->type)) {
nr_deltas++;
delta->obj_no = i;
@@ -1104,7 +1193,7 @@ static void parse_pack_objects(unsigned char *sha1)
check_against_sha1table(obj);
} else {
check_against_sha1table(obj);
- sha1_object(data, NULL, obj->size, obj->type,
+ sha1_object(data, NULL, obj->size, obj->real_type,
obj->idx.sha1);
}
free(data);
--
1.8.2.83.gc99314b
--
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