index-pack: hash non-delta objects while reading from stream

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/builtin/index-pack.c b/builtin/index-pack.c
index dc2cfe6e6f63b6628f8a358f2f3b3e65c14e3b8d..a74485653794220e9a01515f1b233bc06cee5f2f 100644 (file)
--- a/builtin/index-pack.c
+++ b/builtin/index-pack.c
@@ -384,11 +384,27 @@ static void unlink_base_data(struct base_data *c)
        free_base_data(c);
 }
 
-static void *unpack_entry_data(unsigned long offset, unsigned long size)
+static int is_delta_type(enum object_type type)
+{
+       return (type == OBJ_REF_DELTA || type == OBJ_OFS_DELTA);
+}
+
+static void *unpack_entry_data(unsigned long offset, unsigned long size,
+                              enum object_type type, unsigned char *sha1)
 {
        int status;
        git_zstream stream;
        void *buf = xmalloc(size);
+       git_SHA_CTX c;
+       char hdr[32];
+       int hdrlen;
+
+       if (!is_delta_type(type)) {
+               hdrlen = sprintf(hdr, "%s %lu", typename(type), size) + 1;
+               git_SHA1_Init(&c);
+               git_SHA1_Update(&c, hdr, hdrlen);
+       } else
+               sha1 = NULL;
 
        memset(&stream, 0, sizeof(stream));
        git_inflate_init(&stream);
@@ -396,18 +412,25 @@ static void *unpack_entry_data(unsigned long offset, unsigned long size)
        stream.avail_out = size;
 
        do {
+               unsigned char *last_out = stream.next_out;
                stream.next_in = fill(1);
                stream.avail_in = input_len;
                status = git_inflate(&stream, 0);
                use(input_len - stream.avail_in);
+               if (sha1)
+                       git_SHA1_Update(&c, last_out, stream.next_out - last_out);
        } while (status == Z_OK);
        if (stream.total_out != size || status != Z_STREAM_END)
                bad_object(offset, _("inflate returned %d"), status);
        git_inflate_end(&stream);
+       if (sha1)
+               git_SHA1_Final(sha1, &c);
        return buf;
 }
 
-static void *unpack_raw_entry(struct object_entry *obj, union delta_base *delta_base)
+static void *unpack_raw_entry(struct object_entry *obj,
+                             union delta_base *delta_base,
+                             unsigned char *sha1)
 {
        unsigned char *p;
        unsigned long size, c;
@@ -467,7 +490,7 @@ static void *unpack_raw_entry(struct object_entry *obj, union delta_base *delta_
        }
        obj->hdr_size = consumed_bytes - obj->idx.offset;
 
-       data = unpack_entry_data(obj->idx.offset, obj->size);
+       data = unpack_entry_data(obj->idx.offset, obj->size, obj->type, sha1);
        obj->idx.crc32 = input_crc32;
        return data;
 }
@@ -569,9 +592,8 @@ static void find_delta_children(const union delta_base *base,
 }
 
 static void sha1_object(const void *data, unsigned long size,
-                       enum object_type type, unsigned char *sha1)
+                       enum object_type type, const unsigned char *sha1)
 {
-       hash_sha1_file(data, size, typename(type), sha1);
        read_lock();
        if (has_sha1_file(sha1)) {
                void *has_data;
@@ -627,11 +649,6 @@ static void sha1_object(const void *data, unsigned long size,
        }
 }
 
-static int is_delta_type(enum object_type type)
-{
-       return (type == OBJ_REF_DELTA || type == OBJ_OFS_DELTA);
-}
-
 /*
  * This function is part of find_unresolved_deltas(). There are two
  * walkers going in the opposite ways.
@@ -711,6 +728,8 @@ static void resolve_delta(struct object_entry *delta_obj,
        free(delta_data);
        if (!result->data)
                bad_object(delta_obj->idx.offset, _("failed to apply delta"));
+       hash_sha1_file(result->data, result->size,
+                      typename(delta_obj->real_type), delta_obj->idx.sha1);
        sha1_object(result->data, result->size, delta_obj->real_type,
                    delta_obj->idx.sha1);
        counter_lock();
@@ -851,7 +870,7 @@ static void parse_pack_objects(unsigned char *sha1)
                                nr_objects);
        for (i = 0; i < nr_objects; i++) {
                struct object_entry *obj = &objects[i];
-               void *data = unpack_raw_entry(obj, &delta->base);
+               void *data = unpack_raw_entry(obj, &delta->base, obj->idx.sha1);
                obj->real_type = obj->type;
                if (is_delta_type(obj->type)) {
                        nr_deltas++;