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| author | brian m. carlson <sandals@crustytoothpaste.net> | 2020-02-22 20:17:27 (GMT) |
|---|---|---|
| committer | Junio C Hamano <gitster@pobox.com> | 2020-02-24 17:33:21 (GMT) |
| commit | 768e30ea27c58aa69893e10b96ba5ba5680dc3cf (patch) | |
| tree | eed6e6b8db5bcef9ee99aa7e1fd675da3e6e7e54 /sha1-file.c | |
| parent | 207899137dd75916f65bb9988ccf0559760427d6 (diff) | |
| download | git-768e30ea27c58aa69893e10b96ba5ba5680dc3cf.zip git-768e30ea27c58aa69893e10b96ba5ba5680dc3cf.tar.gz git-768e30ea27c58aa69893e10b96ba5ba5680dc3cf.tar.bz2 | |
hash: implement and use a context cloning function
For all of our SHA-1 implementations and most of our SHA-256
implementations, the hash context we use is a real struct. For these
implementations, it's possible to copy a hash context by making a copy
of the struct.
However, for our libgcrypt implementation, our hash context is a
pointer. Consequently, copying it does not lead to an independent hash
context like we intended.
Fortunately, however, libgcrypt provides us with a handy function to
copy hash contexts. Let's add a cloning function to the hash algorithm
API, and use it in the one place we need to make a hash context copy.
With this change, our libgcrypt SHA-256 implementation is fully
functional with all of our other hash implementations.
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'sha1-file.c')
| -rw-r--r-- | sha1-file.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/sha1-file.c b/sha1-file.c index d785de8..c36ca5a 100644 --- a/sha1-file.c +++ b/sha1-file.c @@ -74,6 +74,11 @@ static void git_hash_sha1_init(git_hash_ctx *ctx) git_SHA1_Init(&ctx->sha1); } +static void git_hash_sha1_clone(git_hash_ctx *dst, const git_hash_ctx *src) +{ + git_SHA1_Clone(&dst->sha1, &src->sha1); +} + static void git_hash_sha1_update(git_hash_ctx *ctx, const void *data, size_t len) { git_SHA1_Update(&ctx->sha1, data, len); @@ -90,6 +95,11 @@ static void git_hash_sha256_init(git_hash_ctx *ctx) git_SHA256_Init(&ctx->sha256); } +static void git_hash_sha256_clone(git_hash_ctx *dst, const git_hash_ctx *src) +{ + git_SHA256_Clone(&dst->sha256, &src->sha256); +} + static void git_hash_sha256_update(git_hash_ctx *ctx, const void *data, size_t len) { git_SHA256_Update(&ctx->sha256, data, len); @@ -105,6 +115,11 @@ static void git_hash_unknown_init(git_hash_ctx *ctx) BUG("trying to init unknown hash"); } +static void git_hash_unknown_clone(git_hash_ctx *dst, const git_hash_ctx *src) +{ + BUG("trying to clone unknown hash"); +} + static void git_hash_unknown_update(git_hash_ctx *ctx, const void *data, size_t len) { BUG("trying to update unknown hash"); @@ -123,6 +138,7 @@ const struct git_hash_algo hash_algos[GIT_HASH_NALGOS] = { 0, 0, git_hash_unknown_init, + git_hash_unknown_clone, git_hash_unknown_update, git_hash_unknown_final, NULL, @@ -136,6 +152,7 @@ const struct git_hash_algo hash_algos[GIT_HASH_NALGOS] = { GIT_SHA1_HEXSZ, GIT_SHA1_BLKSZ, git_hash_sha1_init, + git_hash_sha1_clone, git_hash_sha1_update, git_hash_sha1_final, &empty_tree_oid, @@ -149,6 +166,7 @@ const struct git_hash_algo hash_algos[GIT_HASH_NALGOS] = { GIT_SHA256_HEXSZ, GIT_SHA256_BLKSZ, git_hash_sha256_init, + git_hash_sha256_clone, git_hash_sha256_update, git_hash_sha256_final, &empty_tree_oid_sha256, |