hash: set, copy, and use algo field in struct object_id

index c8f03d8aee..0e85e448ed 100644 --- a/hash.h +++ b/hash.h @@ -192,36 +192,56 @@ static inline int hash_algo_by_ptr(const struct git_hash_algo *p) extern const struct object_id null_oid; -static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2) +static inline int hashcmp_algop(const unsigned char *sha1, const unsigned char *sha2, const struct git_hash_algo *algop) { /* * Teach the compiler that there are only two possibilities of hash size * here, so that it can optimize for this case as much as possible. */ - if (the_hash_algo->rawsz == GIT_MAX_RAWSZ) + if (algop->rawsz == GIT_MAX_RAWSZ) return memcmp(sha1, sha2, GIT_MAX_RAWSZ); return memcmp(sha1, sha2, GIT_SHA1_RAWSZ); } +static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2) +{ + return hashcmp_algop(sha1, sha2, the_hash_algo); +} + static inline int oidcmp(const struct object_id *oid1, const struct object_id *oid2) { - return hashcmp(oid1->hash, oid2->hash); + const struct git_hash_algo *algop; + if (!oid1->algo) + algop = the_hash_algo; + else + algop = &hash_algos[oid1->algo]; + return hashcmp_algop(oid1->hash, oid2->hash, algop); } -static inline int hasheq(const unsigned char *sha1, const unsigned char *sha2) +static inline int hasheq_algop(const unsigned char *sha1, const unsigned char *sha2, const struct git_hash_algo *algop) { /* * We write this here instead of deferring to hashcmp so that the * compiler can properly inline it and avoid calling memcmp. */ - if (the_hash_algo->rawsz == GIT_MAX_RAWSZ) + if (algop->rawsz == GIT_MAX_RAWSZ) return !memcmp(sha1, sha2, GIT_MAX_RAWSZ); return !memcmp(sha1, sha2, GIT_SHA1_RAWSZ); } +static inline int hasheq(const unsigned char *sha1, const unsigned char *sha2) +{ + return hasheq_algop(sha1, sha2, the_hash_algo); +} + static inline int oideq(const struct object_id *oid1, const struct object_id *oid2) { - return hasheq(oid1->hash, oid2->hash); + const struct git_hash_algo *algop; + if (!oid1->algo) + algop = the_hash_algo; + else + algop = &hash_algos[oid1->algo]; + return hasheq_algop(oid1->hash, oid2->hash, algop); } static inline int is_null_oid(const struct object_id *oid) @@ -237,6 +257,7 @@ static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src) static inline void oidcpy(struct object_id *dst, const struct object_id *src) { memcpy(dst->hash, src->hash, GIT_MAX_RAWSZ); + dst->algo = src->algo; } static inline struct object_id *oiddup(const struct object_id *src) @@ -254,11 +275,13 @@ static inline void hashclr(unsigned char *hash) static inline void oidclr(struct object_id *oid) { memset(oid->hash, 0, GIT_MAX_RAWSZ); + oid->algo = hash_algo_by_ptr(the_hash_algo); } static inline void oidread(struct object_id *oid, const unsigned char *hash) { memcpy(oid->hash, hash, the_hash_algo->rawsz); + oid->algo = hash_algo_by_ptr(the_hash_algo); } static inline int is_empty_blob_sha1(const unsigned char *sha1) @@ -281,6 +304,11 @@ static inline int is_empty_tree_oid(const struct object_id *oid) return oideq(oid, the_hash_algo->empty_tree); } +static inline void oid_set_algo(struct object_id *oid, const struct git_hash_algo *algop) +{ + oid->algo = hash_algo_by_ptr(algop); +} + const char *empty_tree_oid_hex(void); const char *empty_blob_oid_hex(void);

index da51e64929..e7af18fe55 100644 --- a/hex.c +++ b/hex.c @@ -69,7 +69,10 @@ int get_sha1_hex(const char *hex, unsigned char *sha1) int get_oid_hex_algop(const char *hex, struct object_id *oid, const struct git_hash_algo *algop) { - return get_hash_hex_algop(hex, oid->hash, algop); + int ret = get_hash_hex_algop(hex, oid->hash, algop); + if (!ret) + oid_set_algo(oid, algop); + return ret; } /* @@ -80,7 +83,7 @@ int get_oid_hex_any(const char *hex, struct object_id *oid) { int i; for (i = GIT_HASH_NALGOS - 1; i > 0; i--) { - if (!get_hash_hex_algop(hex, oid->hash, &hash_algos[i])) + if (!get_oid_hex_algop(hex, oid, &hash_algos[i])) return i; } return GIT_HASH_UNKNOWN; @@ -95,7 +98,7 @@ int parse_oid_hex_algop(const char *hex, struct object_id *oid, const char **end, const struct git_hash_algo *algop) { - int ret = get_hash_hex_algop(hex, oid->hash, algop); + int ret = get_oid_hex_algop(hex, oid, algop); if (!ret) *end = hex + algop->hexsz; return ret;

index a44b25858f..135ea13ba1 100644 --- a/notes.c +++ b/notes.c @@ -455,6 +455,8 @@ static void load_subtree(struct notes_tree *t, struct leaf_node *subtree, CALLOC_ARRAY(l, 1); oidcpy(&l->key_oid, &object_oid); oidcpy(&l->val_oid, &entry.oid); + oid_set_algo(&l->key_oid, the_hash_algo); + oid_set_algo(&l->val_oid, the_hash_algo); if (note_tree_insert(t, node, n, l, type, combine_notes_concatenate)) die("Failed to load %s %s into notes tree " @@ -484,6 +486,7 @@ handle_non_note: strbuf_addch(&non_note_path, '/'); } strbuf_addstr(&non_note_path, entry.path); + oid_set_algo(&entry.oid, the_hash_algo); add_non_note(t, strbuf_detach(&non_note_path, NULL), entry.mode, entry.oid.hash); }

index 1d8c82fa99..d4ba0c4a4f 100644 --- a/object-file.c +++ b/object-file.c @@ -57,16 +57,20 @@ const struct object_id null_oid; static const struct object_id empty_tree_oid = { - EMPTY_TREE_SHA1_BIN_LITERAL + .hash = EMPTY_TREE_SHA1_BIN_LITERAL, + .algo = GIT_HASH_SHA1, }; static const struct object_id empty_blob_oid = { - EMPTY_BLOB_SHA1_BIN_LITERAL + .hash = EMPTY_BLOB_SHA1_BIN_LITERAL, + .algo = GIT_HASH_SHA1, }; static const struct object_id empty_tree_oid_sha256 = { - EMPTY_TREE_SHA256_BIN_LITERAL + .hash = EMPTY_TREE_SHA256_BIN_LITERAL, + .algo = GIT_HASH_SHA256, }; static const struct object_id empty_blob_oid_sha256 = { - EMPTY_BLOB_SHA256_BIN_LITERAL + .hash = EMPTY_BLOB_SHA256_BIN_LITERAL, + .algo = GIT_HASH_SHA256, }; static void git_hash_sha1_init(git_hash_ctx *ctx) @@ -93,6 +97,7 @@ static void git_hash_sha1_final_oid(struct object_id *oid, git_hash_ctx *ctx) { git_SHA1_Final(oid->hash, &ctx->sha1); memset(oid->hash + GIT_SHA1_RAWSZ, 0, GIT_MAX_RAWSZ - GIT_SHA1_RAWSZ); + oid->algo = GIT_HASH_SHA1; } @@ -124,6 +129,7 @@ static void git_hash_sha256_final_oid(struct object_id *oid, git_hash_ctx *ctx) * but keep it in case we extend the hash size again. */ memset(oid->hash + GIT_SHA256_RAWSZ, 0, GIT_MAX_RAWSZ - GIT_SHA256_RAWSZ); + oid->algo = GIT_HASH_SHA256; } static void git_hash_unknown_init(git_hash_ctx *ctx) @@ -2340,6 +2346,7 @@ int for_each_file_in_obj_subdir(unsigned int subdir_nr, if (namelen == the_hash_algo->hexsz - 2 && !hex_to_bytes(oid.hash + 1, de->d_name, the_hash_algo->rawsz - 1)) { + oid_set_algo(&oid, the_hash_algo); if (obj_cb) { r = obj_cb(&oid, path->buf, data); if (r)