make is_empty_blob_sha1 available everywhere
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@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Jeff King committed
Mar 22, 2012 at 14:53 UTC
f8582cad8d11cae15e73fe5213b6180ee4b9fcce
2 files changed
+13
-10
cache.h
+13
@@ -708,6 +708,19 @@ static inline void hashclr(unsigned char *hash)
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#define EMPTY_TREE_SHA1_BIN \
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((const unsigned char *) EMPTY_TREE_SHA1_BIN_LITERAL)
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+#define EMPTY_BLOB_SHA1_HEX \
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+ "e69de29bb2d1d6434b8b29ae775ad8c2e48c5391"
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+#define EMPTY_BLOB_SHA1_BIN_LITERAL \
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+ "\xe6\x9d\xe2\x9b\xb2\xd1\xd6\x43\x4b\x8b" \
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+ "\x29\xae\x77\x5a\xd8\xc2\xe4\x8c\x53\x91"
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+#define EMPTY_BLOB_SHA1_BIN \
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+ ((const unsigned char *) EMPTY_BLOB_SHA1_BIN_LITERAL)
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+
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+static inline int is_empty_blob_sha1(const unsigned char *sha1)
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+{
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+ return !hashcmp(sha1, EMPTY_BLOB_SHA1_BIN);
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+}
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+
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int git_mkstemp(char *path, size_t n, const char *template);
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int git_mkstemps(char *path, size_t n, const char *template, int suffix_len);
read-cache.c
-10
@@ -157,16 +157,6 @@ static int ce_modified_check_fs(struct cache_entry *ce, struct stat *st)
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return 0;
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}
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-static int is_empty_blob_sha1(const unsigned char *sha1)
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-{
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- static const unsigned char empty_blob_sha1[20] = {
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- 0xe6,0x9d,0xe2,0x9b,0xb2,0xd1,0xd6,0x43,0x4b,0x8b,
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- 0x29,0xae,0x77,0x5a,0xd8,0xc2,0xe4,0x8c,0x53,0x91
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- };
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-
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- return !hashcmp(sha1, empty_blob_sha1);
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-}
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-
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static int ce_match_stat_basic(struct cache_entry *ce, struct stat *st)
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{
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unsigned int changed = 0;