diff options
Diffstat (limited to 'show-index.c')
| -rw-r--r-- | show-index.c | 76 |
1 files changed, 67 insertions, 9 deletions
diff --git a/show-index.c b/show-index.c index a30a2de5d1..5a9eed7fd8 100644 --- a/show-index.c +++ b/show-index.c @@ -1,14 +1,33 @@ #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 entry[6]; + unsigned int version; static unsigned int top_index[256]; - if (fread(top_index, sizeof(top_index), 1, stdin) != 1) - die("unable to read index"); + git_setup_gettext(); + + 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]); @@ -16,13 +35,52 @@ int main(int argc, char **argv) die("corrupt index file"); nr = n; } - for (i = 0; i < nr; i++) { - unsigned offset; + if (version == 1) { + for (i = 0; i < nr; i++) { + unsigned int offset, entry[6]; - if (fread(entry, 24, 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))); + 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 = xmalloc(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; } |