The read-cache implementation defines this static function,
but it is a generally useful concept in git. Let's give
the empty blob the same treatment as the empty tree,
providing both hex and binary forms of the sha1.
Signed-off-by: Jeff King <peff@xxxxxxxx>
---
cache.h | 13 +++++++++++++
read-cache.c | 10 ----------
2 files changed, 13 insertions(+), 10 deletions(-)
diff --git a/cache.h b/cache.h
index e5e1aa4..5280574 100644
--- a/cache.h
+++ b/cache.h
@@ -708,6 +708,19 @@ static inline void hashclr(unsigned char *hash)
#define EMPTY_TREE_SHA1_BIN \
((const unsigned char *) EMPTY_TREE_SHA1_BIN_LITERAL)
+#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)
+
+static inline int is_empty_blob_sha1(const unsigned char *sha1)
+{
+ return !hashcmp(sha1, EMPTY_BLOB_SHA1_BIN);
+}
+
int git_mkstemp(char *path, size_t n, const char *template);
int git_mkstemps(char *path, size_t n, const char *template, int suffix_len);
diff --git a/read-cache.c b/read-cache.c
index 274e54b..6c8f395 100644
--- a/read-cache.c
+++ b/read-cache.c
@@ -157,16 +157,6 @@ static int ce_modified_check_fs(struct cache_entry *ce, struct stat *st)
return 0;
}
-static int is_empty_blob_sha1(const unsigned char *sha1)
-{
- static const unsigned char empty_blob_sha1[20] = {
- 0xe6,0x9d,0xe2,0x9b,0xb2,0xd1,0xd6,0x43,0x4b,0x8b,
- 0x29,0xae,0x77,0x5a,0xd8,0xc2,0xe4,0x8c,0x53,0x91
- };
-
- return !hashcmp(sha1, empty_blob_sha1);
-}
-
static int ce_match_stat_basic(struct cache_entry *ce, struct stat *st)
{
unsigned int changed = 0;
--
1.7.10.rc0.9.gdcbe9
--
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