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write_pack_header(): a helper function

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Factor out a small logic out of the private write_pack_file() function
in builtin/pack-objects.c

Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Junio C Hamano 2011-10-28 11:40:48 -07:00
parent e8e1c29021
commit c0ad465725
3 changed files with 17 additions and 6 deletions
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9
builtin/pack-objects.c
View File

@ -571,7 +571,6 @@ static void write_pack_file(void)
uint32_t i = 0, j;
struct sha1file *f;
off_t offset;
struct pack_header hdr;
uint32_t nr_remaining = nr_result;
time_t last_mtime = 0;
struct object_entry **write_order;
@ -596,11 +595,9 @@ static void write_pack_file(void)
f = sha1fd(fd, pack_tmp_name);
}
hdr.hdr_signature = htonl(PACK_SIGNATURE);
hdr.hdr_version = htonl(PACK_VERSION);
hdr.hdr_entries = htonl(nr_remaining);
sha1write(f, &hdr, sizeof(hdr));
offset = sizeof(hdr);
offset = write_pack_header(f, nr_remaining);
if (!offset)
die_errno("unable to write pack header");
nr_written = 0;
for (; i < nr_objects; i++) {
struct object_entry *e = write_order[i];

12
pack-write.c
View File

@ -178,6 +178,18 @@ const char *write_idx_file(const char *index_name, struct pack_idx_entry **objec
return index_name;
}
off_t write_pack_header(struct sha1file *f, uint32_t nr_entries)
{
struct pack_header hdr;
hdr.hdr_signature = htonl(PACK_SIGNATURE);
hdr.hdr_version = htonl(PACK_VERSION);
hdr.hdr_entries = htonl(nr_entries);
if (sha1write(f, &hdr, sizeof(hdr)))
return 0;
return sizeof(hdr);
}
/*
* Update pack header with object_count and compute new SHA1 for pack data
* associated to pack_fd, and write that SHA1 at the end. That new SHA1

2
pack.h
View File

@ -2,6 +2,7 @@
#define PACK_H
#include "object.h"
#include "csum-file.h"
/*
* Packed object header
@ -74,6 +75,7 @@ extern const char *write_idx_file(const char *index_name, struct pack_idx_entry
extern int check_pack_crc(struct packed_git *p, struct pack_window **w_curs, off_t offset, off_t len, unsigned int nr);
extern int verify_pack_index(struct packed_git *);
extern int verify_pack(struct packed_git *);
extern off_t write_pack_header(struct sha1file *f, uint32_t);
extern void fixup_pack_header_footer(int, unsigned char *, const char *, uint32_t, unsigned char *, off_t);
extern char *index_pack_lockfile(int fd);
extern int encode_in_pack_object_header(enum object_type, uintmax_t, unsigned char *);