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-rw-r--r--hashmap.h11
1 files changed, 11 insertions, 0 deletions
diff --git a/hashmap.h b/hashmap.h
index a816ad47b1..c51fd0abf7 100644
--- a/hashmap.h
+++ b/hashmap.h
@@ -13,6 +13,17 @@ extern unsigned int strihash(const char *buf);
extern unsigned int memhash(const void *buf, size_t len);
extern unsigned int memihash(const void *buf, size_t len);
+static inline unsigned int sha1hash(const unsigned char *sha1)
+{
+ /*
+ * Equivalent to 'return *(unsigned int *)sha1;', but safe on
+ * platforms that don't support unaligned reads.
+ */
+ unsigned int hash;
+ memcpy(&hash, sha1, sizeof(hash));
+ return hash;
+}
+
/* data structures */
struct hashmap_entry {