diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-06-26 02:59:31 +0400 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-06-26 02:59:31 +0400 |
commit | 745369583105c8a048a765f8b5cbf7e7ebd1f982 (patch) | |
tree | ebe7f828b440ddc514810c01da7b902ce7c2ed67 | |
parent | d38c3721a1813048a6c7c1597b0c2e5b18517f9d (diff) |
git-unpack-objects: start parsing the actual packed data
So far we just print out the type and size.
-rw-r--r-- | unpack-objects.c | 63 |
1 files changed, 58 insertions, 5 deletions
diff --git a/unpack-objects.c b/unpack-objects.c index 73d0c2d632..7b175c9a49 100644 --- a/unpack-objects.c +++ b/unpack-objects.c @@ -1,5 +1,7 @@ #include "cache.h" +#include "object.h" +static int dry_run; static int nr_entries; static const char *base_name; static const char unpack_usage[] = "git-unpack-objects basename"; @@ -9,6 +11,9 @@ struct pack_entry { unsigned char sha1[20]; }; +static void *pack_base; +static unsigned long pack_size; + static struct pack_entry **pack_list; static void *map_file(const char *suffix, unsigned long *sizep) @@ -63,7 +68,7 @@ static int check_index(void *index, unsigned long idx_size) nr = n; } if (idx_size != 4*256 + nr * 24) { - printf("idx_size=%d, expected %d (%d)\n", idx_size, 4*256 + nr * 24, nr); + printf("idx_size=%lu, expected %u (%u)\n", idx_size, 4*256 + nr * 24, nr); return error("wrong index file size"); } @@ -78,17 +83,64 @@ static int check_index(void *index, unsigned long idx_size) return 0; } +static void unpack_entry(struct pack_entry *entry) +{ + unsigned long size; + unsigned long offset; + unsigned char *pack; + + /* Have we done this one already due to deltas based on it? */ + if (lookup_object(entry->sha1)) + return; + + offset = ntohl(entry->offset); + if (offset > pack_size - 5) + die("object offset outside of pack file"); + pack = pack_base + offset; + offset = pack_size - offset; + switch (*pack) { + case 'C': case 'T': case 'B': + size = (pack[1] << 24) + (pack[2] << 16) + (pack[3] << 8) + pack[4]; + printf("%s %c %lu\n", sha1_to_hex(entry->sha1), *pack, size); + break; + case 'D': + printf("%s D", sha1_to_hex(entry->sha1)); + printf(" %s\n", sha1_to_hex(pack+1)); + break; + default: + die("corrupted pack file"); + } +} + +/* + * We unpack from the end, older files first. Now, usually + * there are deltas etc, so we'll not actually write the + * objects in that order, but we might as well try.. + */ +static void unpack_all(void) +{ + int i = nr_entries; + + while (--i >= 0) { + struct pack_entry *entry = pack_list[i]; + unpack_entry(entry); + } +} + int main(int argc, char **argv) { int i; - unsigned long idx_size, pack_size; - void *index, *pack; + unsigned long idx_size; + void *index; for (i = 1 ; i < argc; i++) { const char *arg = argv[i]; if (*arg == '-') { - /* Maybe we'll have some flags here some day.. */ + if (!strcmp(arg, "-n")) { + dry_run = 1; + continue; + } usage(unpack_usage); } if (base_name) @@ -98,8 +150,9 @@ int main(int argc, char **argv) if (!base_name) usage(unpack_usage); index = map_file("idx", &idx_size); - pack = map_file("pack", &pack_size); + pack_base = map_file("pack", &pack_size); if (check_index(index, idx_size) < 0) die("bad index file"); + unpack_all(); return 0; } |