mirror of
https://github.com/git/git.git
synced 2024-12-27 18:54:38 +08:00
be8e172e9f
In this code path, we use sha1_to_hex to display the contents of a v1 pack index. While we plan to switch to v3 indices for SHA-256, the v1 pack indices still function, so to support both algorithms, switch sha1_to_hex to hash_to_hex. Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
88 lines
2.3 KiB
C
88 lines
2.3 KiB
C
#include "builtin.h"
|
|
#include "cache.h"
|
|
#include "pack.h"
|
|
|
|
static const char show_index_usage[] =
|
|
"git show-index";
|
|
|
|
int cmd_show_index(int argc, const char **argv, const char *prefix)
|
|
{
|
|
int i;
|
|
unsigned nr;
|
|
unsigned int version;
|
|
static unsigned int top_index[256];
|
|
const unsigned hashsz = the_hash_algo->rawsz;
|
|
|
|
if (argc != 1)
|
|
usage(show_index_usage);
|
|
if (fread(top_index, 2 * 4, 1, stdin) != 1)
|
|
die("unable to read header");
|
|
if (top_index[0] == htonl(PACK_IDX_SIGNATURE)) {
|
|
version = ntohl(top_index[1]);
|
|
if (version < 2 || version > 2)
|
|
die("unknown index version");
|
|
if (fread(top_index, 256 * 4, 1, stdin) != 1)
|
|
die("unable to read index");
|
|
} else {
|
|
version = 1;
|
|
if (fread(&top_index[2], 254 * 4, 1, stdin) != 1)
|
|
die("unable to read index");
|
|
}
|
|
nr = 0;
|
|
for (i = 0; i < 256; i++) {
|
|
unsigned n = ntohl(top_index[i]);
|
|
if (n < nr)
|
|
die("corrupt index file");
|
|
nr = n;
|
|
}
|
|
if (version == 1) {
|
|
for (i = 0; i < nr; i++) {
|
|
unsigned int offset, entry[(GIT_MAX_RAWSZ + 4) / sizeof(unsigned int)];
|
|
|
|
if (fread(entry, 4 + hashsz, 1, stdin) != 1)
|
|
die("unable to read entry %u/%u", i, nr);
|
|
offset = ntohl(entry[0]);
|
|
printf("%u %s\n", offset, hash_to_hex((void *)(entry+1)));
|
|
}
|
|
} else {
|
|
unsigned off64_nr = 0;
|
|
struct {
|
|
struct object_id oid;
|
|
uint32_t crc;
|
|
uint32_t off;
|
|
} *entries;
|
|
ALLOC_ARRAY(entries, nr);
|
|
for (i = 0; i < nr; i++)
|
|
if (fread(entries[i].oid.hash, hashsz, 1, stdin) != 1)
|
|
die("unable to read sha1 %u/%u", i, nr);
|
|
for (i = 0; i < nr; i++)
|
|
if (fread(&entries[i].crc, 4, 1, stdin) != 1)
|
|
die("unable to read crc %u/%u", i, nr);
|
|
for (i = 0; i < nr; i++)
|
|
if (fread(&entries[i].off, 4, 1, stdin) != 1)
|
|
die("unable to read 32b offset %u/%u", i, nr);
|
|
for (i = 0; i < nr; i++) {
|
|
uint64_t offset;
|
|
uint32_t off = ntohl(entries[i].off);
|
|
if (!(off & 0x80000000)) {
|
|
offset = off;
|
|
} else {
|
|
uint32_t off64[2];
|
|
if ((off & 0x7fffffff) != off64_nr)
|
|
die("inconsistent 64b offset index");
|
|
if (fread(off64, 8, 1, stdin) != 1)
|
|
die("unable to read 64b offset %u", off64_nr);
|
|
offset = (((uint64_t)ntohl(off64[0])) << 32) |
|
|
ntohl(off64[1]);
|
|
off64_nr++;
|
|
}
|
|
printf("%" PRIuMAX " %s (%08"PRIx32")\n",
|
|
(uintmax_t) offset,
|
|
oid_to_hex(&entries[i].oid),
|
|
ntohl(entries[i].crc));
|
|
}
|
|
free(entries);
|
|
}
|
|
return 0;
|
|
}
|