[PATCH 05/10] compute object CRC32 with index-pack
Same as previous patch but for index-pack.
Signed-off-by: Nicolas Pitre <nico@cam.org>
---
index-pack.c | 16 +++++++++++++---
1 files changed, 13 insertions(+), 3 deletions(-)
diff --git a/index-pack.c b/index-pack.c
index 66fb0bc..d33f723 100644
--- a/index-pack.c
+++ b/index-pack.c
@@ -15,6 +15,7 @@ struct object_entry
off_t offset;
unsigned long size;
unsigned int hdr_size;
+ uint32_t crc32;
enum object_type type;
enum object_type real_type;
unsigned char sha1[20];
@@ -86,6 +87,7 @@ static unsigned char input_buffer[4096];
static unsigned int input_offset, input_len;
static off_t consumed_bytes;
static SHA_CTX input_ctx;
+static uint32_t input_crc32;
static int input_fd, output_fd, pack_fd;
/* Discard current buffer used content. */
@@ -128,6 +130,7 @@ static void use(int bytes)
{
if (bytes > input_len)
die("used more bytes than were available");
+ input_crc32 = crc32(input_crc32, input_buffer + input_offset, bytes);
input_len -= bytes;
input_offset += bytes;
@@ -224,8 +227,10 @@ static void *unpack_raw_entry(struct object_entry *obj, union delta_base *delta_
unsigned long size;
off_t base_offset;
unsigned shift;
+ void *data;
obj->offset = consumed_bytes;
+ input_crc32 = crc32(0, Z_NULL, 0);
p = fill(1);
c = *p;
@@ -276,7 +281,9 @@ static void *unpack_raw_entry(struct object_entry *obj, union delta_base *delta_
}
obj->hdr_size = consumed_bytes - obj->offset;
- return unpack_entry_data(obj->offset, obj->size);
+ data = unpack_entry_data(obj->offset, obj->size);
+ obj->crc32 = input_crc32;
+ return data;
}
static void *get_data_from_pack(struct object_entry *obj)
@@ -521,7 +528,7 @@ static void parse_pack_objects(unsigned char *sha1)
fputc('\n', stderr);
}
-static int write_compressed(int fd, void *in, unsigned int size)
+static int write_compressed(int fd, void *in, unsigned int size, uint32_t *obj_crc)
{
z_stream stream;
unsigned long maxsize;
@@ -542,6 +549,7 @@ static int write_compressed(int fd, void *in, unsigned int size)
size = stream.total_out;
write_or_die(fd, out, size);
+ *obj_crc = crc32(*obj_crc, out, size);
free(out);
return size;
}
@@ -562,8 +570,10 @@ static void append_obj_to_pack(const unsigned char *sha1, void *buf,
}
header[n++] = c;
write_or_die(output_fd, header, n);
+ obj[0].crc32 = crc32(0, Z_NULL, 0);
+ obj[0].crc32 = crc32(obj[0].crc32, header, n);
obj[1].offset = obj[0].offset + n;
- obj[1].offset += write_compressed(output_fd, buf, size);
+ obj[1].offset += write_compressed(output_fd, buf, size, &obj[0].crc32);
hashcpy(obj->sha1, sha1);
}
--
1.5.1.696.g6d352-dirty
Nicolas Pitre <nico@cam.org>