a5031214c4
As the documentation says, this is primarily for debugging, and
in the longer term we should rename it to test-show-index or something.
In the meantime, just avoid xmalloc (which slurps in the rest of git), and
separating out the trivial hex functions into "hex.o".
This results in
[torvalds@nehalem git]$ size git-show-index
text data bss dec hex filename
222818 2276 112688 337782 52776 git-show-index (before)
5696 624 1264 7584 1da0 git-show-index (after)
which is a whole lot better.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
85 lines
2.2 KiB
C
85 lines
2.2 KiB
C
#include "cache.h"
|
|
#include "pack.h"
|
|
|
|
static const char show_index_usage[] =
|
|
"git show-index < <packed archive index>";
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
int i;
|
|
unsigned nr;
|
|
unsigned int version;
|
|
static unsigned int top_index[256];
|
|
|
|
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[6];
|
|
|
|
if (fread(entry, 4 + 20, 1, stdin) != 1)
|
|
die("unable to read entry %u/%u", i, nr);
|
|
offset = ntohl(entry[0]);
|
|
printf("%u %s\n", offset, sha1_to_hex((void *)(entry+1)));
|
|
}
|
|
} else {
|
|
unsigned off64_nr = 0;
|
|
struct {
|
|
unsigned char sha1[20];
|
|
uint32_t crc;
|
|
uint32_t off;
|
|
} *entries = malloc(nr * sizeof(entries[0]));
|
|
for (i = 0; i < nr; i++)
|
|
if (fread(entries[i].sha1, 20, 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,
|
|
sha1_to_hex(entries[i].sha1),
|
|
ntohl(entries[i].crc));
|
|
}
|
|
free(entries);
|
|
}
|
|
return 0;
|
|
}
|