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https://github.com/git/git
synced 2024-07-17 02:57:48 +00:00
d1cbe1e6d8
hash.h depends upon and includes repository.h, due to the definition and use of the_hash_algo (defined as the_repository->hash_algo). However, most headers trying to include hash.h are only interested in the layout of the structs like object_id. Move the parts of hash.h that do not depend upon repository.h into a new file hash-ll.h (the "low level" parts of hash.h), and adjust other files to use this new header where the convenience inline functions aren't needed. This allows hash.h and object.h to be fairly small, minimal headers. It also exposes a lot of hidden dependencies on both path.h (which was brought in by repository.h) and repository.h (which was previously implicitly brought in by object.h), so also adjust other files to be more explicit about what they depend upon. Signed-off-by: Elijah Newren <newren@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
113 lines
3 KiB
C
113 lines
3 KiB
C
#include "builtin.h"
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#include "cache.h"
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#include "gettext.h"
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#include "hash.h"
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#include "hex.h"
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#include "pack.h"
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#include "parse-options.h"
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#include "repository.h"
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static const char *const show_index_usage[] = {
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"git show-index [--object-format=<hash-algorithm>]",
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NULL
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};
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int cmd_show_index(int argc, const char **argv, const char *prefix)
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{
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int i;
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unsigned nr;
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unsigned int version;
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static unsigned int top_index[256];
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unsigned hashsz;
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const char *hash_name = NULL;
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int hash_algo;
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const struct option show_index_options[] = {
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OPT_STRING(0, "object-format", &hash_name, N_("hash-algorithm"),
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N_("specify the hash algorithm to use")),
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OPT_END()
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};
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argc = parse_options(argc, argv, prefix, show_index_options, show_index_usage, 0);
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if (hash_name) {
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hash_algo = hash_algo_by_name(hash_name);
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if (hash_algo == GIT_HASH_UNKNOWN)
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die(_("Unknown hash algorithm"));
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repo_set_hash_algo(the_repository, hash_algo);
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}
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hashsz = the_hash_algo->rawsz;
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if (fread(top_index, 2 * 4, 1, stdin) != 1)
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die("unable to read header");
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if (top_index[0] == htonl(PACK_IDX_SIGNATURE)) {
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version = ntohl(top_index[1]);
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if (version < 2 || version > 2)
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die("unknown index version");
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if (fread(top_index, 256 * 4, 1, stdin) != 1)
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die("unable to read index");
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} else {
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version = 1;
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if (fread(&top_index[2], 254 * 4, 1, stdin) != 1)
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die("unable to read index");
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}
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nr = 0;
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for (i = 0; i < 256; i++) {
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unsigned n = ntohl(top_index[i]);
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if (n < nr)
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die("corrupt index file");
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nr = n;
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}
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if (version == 1) {
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for (i = 0; i < nr; i++) {
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unsigned int offset, entry[(GIT_MAX_RAWSZ + 4) / sizeof(unsigned int)];
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if (fread(entry, 4 + hashsz, 1, stdin) != 1)
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die("unable to read entry %u/%u", i, nr);
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offset = ntohl(entry[0]);
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printf("%u %s\n", offset, hash_to_hex((void *)(entry+1)));
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}
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} else {
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unsigned off64_nr = 0;
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struct {
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struct object_id oid;
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uint32_t crc;
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uint32_t off;
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} *entries;
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ALLOC_ARRAY(entries, nr);
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for (i = 0; i < nr; i++) {
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if (fread(entries[i].oid.hash, hashsz, 1, stdin) != 1)
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die("unable to read sha1 %u/%u", i, nr);
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entries[i].oid.algo = hash_algo_by_ptr(the_hash_algo);
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}
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for (i = 0; i < nr; i++)
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if (fread(&entries[i].crc, 4, 1, stdin) != 1)
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die("unable to read crc %u/%u", i, nr);
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for (i = 0; i < nr; i++)
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if (fread(&entries[i].off, 4, 1, stdin) != 1)
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die("unable to read 32b offset %u/%u", i, nr);
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for (i = 0; i < nr; i++) {
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uint64_t offset;
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uint32_t off = ntohl(entries[i].off);
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if (!(off & 0x80000000)) {
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offset = off;
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} else {
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uint32_t off64[2];
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if ((off & 0x7fffffff) != off64_nr)
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die("inconsistent 64b offset index");
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if (fread(off64, 8, 1, stdin) != 1)
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die("unable to read 64b offset %u", off64_nr);
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offset = (((uint64_t)ntohl(off64[0])) << 32) |
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ntohl(off64[1]);
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off64_nr++;
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}
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printf("%" PRIuMAX " %s (%08"PRIx32")\n",
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(uintmax_t) offset,
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oid_to_hex(&entries[i].oid),
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ntohl(entries[i].crc));
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}
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free(entries);
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}
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return 0;
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}
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