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| author | Jacob Keller <jacob.keller@gmail.com> | 2016-08-31 16:27:18 -0700 |
|---|---|---|
| committer | Junio C Hamano <gitster@pobox.com> | 2016-08-31 18:07:08 -0700 |
| commit | 8576fde6cb4013a41d162e33f7a0046a5ea6801e (patch) | |
| tree | a94696726b0bb8535aa4d52e03b881e3804ad220 /cache.h | |
| parent | a42d7b6a5b5addcce01f483547ad96825c7a96e0 (diff) | |
| download | git-8576fde6cb4013a41d162e33f7a0046a5ea6801e.tar.gz git-8576fde6cb4013a41d162e33f7a0046a5ea6801e.tar.xz | |
cache: add empty_tree_oid object and helper function
Similar to is_null_oid(), and is_empty_blob_sha1() add an
empty_tree_oid along with helper function is_empty_tree_oid(). For
completeness, also add an "is_empty_tree_sha1()",
"is_empty_blob_sha1()", "is_empty_tree_oid()" and "is_empty_blob_oid()"
helpers.
To ensure we only get one singleton, implement EMPTY_BLOB_SHA1_BIN as
simply getting the hash of empty_blob_oid structure.
Signed-off-by: Jacob Keller <jacob.keller@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'cache.h')
| -rw-r--r-- | cache.h | 25 |
1 files changed, 21 insertions, 4 deletions
@@ -953,22 +953,39 @@ static inline void oidclr(struct object_id *oid) #define EMPTY_TREE_SHA1_BIN_LITERAL \ "\x4b\x82\x5d\xc6\x42\xcb\x6e\xb9\xa0\x60" \ "\xe5\x4b\xf8\xd6\x92\x88\xfb\xee\x49\x04" -#define EMPTY_TREE_SHA1_BIN \ - ((const unsigned char *) EMPTY_TREE_SHA1_BIN_LITERAL) +extern const struct object_id empty_tree_oid; +#define EMPTY_TREE_SHA1_BIN (empty_tree_oid.hash) #define EMPTY_BLOB_SHA1_HEX \ "e69de29bb2d1d6434b8b29ae775ad8c2e48c5391" #define EMPTY_BLOB_SHA1_BIN_LITERAL \ "\xe6\x9d\xe2\x9b\xb2\xd1\xd6\x43\x4b\x8b" \ "\x29\xae\x77\x5a\xd8\xc2\xe4\x8c\x53\x91" -#define EMPTY_BLOB_SHA1_BIN \ - ((const unsigned char *) EMPTY_BLOB_SHA1_BIN_LITERAL) +extern const struct object_id empty_blob_oid; +#define EMPTY_BLOB_SHA1_BIN (empty_blob_oid.hash) + static inline int is_empty_blob_sha1(const unsigned char *sha1) { return !hashcmp(sha1, EMPTY_BLOB_SHA1_BIN); } +static inline int is_empty_blob_oid(const struct object_id *oid) +{ + return !hashcmp(oid->hash, EMPTY_BLOB_SHA1_BIN); +} + +static inline int is_empty_tree_sha1(const unsigned char *sha1) +{ + return !hashcmp(sha1, EMPTY_TREE_SHA1_BIN); +} + +static inline int is_empty_tree_oid(const struct object_id *oid) +{ + return !hashcmp(oid->hash, EMPTY_TREE_SHA1_BIN); +} + + int git_mkstemp(char *path, size_t n, const char *template); /* set default permissions by passing mode arguments to open(2) */ |