1 files changed, 102 insertions, 0 deletions
diff --git a/hash.h b/hash.h
new file mode 100644
index 0000000..615ae06
--- /dev/null
+++ b/hash.h
@@ -0,0 +1,102 @@
+#ifndef HASH_H
+#define HASH_H
+
+#include "hash-ll.h"
+#include "repository.h"
+
+#define the_hash_algo the_repository->hash_algo
+
+static inline int hashcmp(const unsigned char *sha1, const unsigned char *sha2)
+{
+	return hashcmp_algop(sha1, sha2, the_hash_algo);
+}
+
+static inline int oidcmp(const struct object_id *oid1, const struct object_id *oid2)
+{
+	const struct git_hash_algo *algop;
+	if (!oid1->algo)
+		algop = the_hash_algo;
+	else
+		algop = &hash_algos[oid1->algo];
+	return hashcmp_algop(oid1->hash, oid2->hash, algop);
+}
+
+static inline int hasheq(const unsigned char *sha1, const unsigned char *sha2)
+{
+	return hasheq_algop(sha1, sha2, the_hash_algo);
+}
+
+static inline int oideq(const struct object_id *oid1, const struct object_id *oid2)
+{
+	const struct git_hash_algo *algop;
+	if (!oid1->algo)
+		algop = the_hash_algo;
+	else
+		algop = &hash_algos[oid1->algo];
+	return hasheq_algop(oid1->hash, oid2->hash, algop);
+}
+
+static inline int is_null_oid(const struct object_id *oid)
+{
+	return oideq(oid, null_oid());
+}
+
+static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src)
+{
+	memcpy(sha_dst, sha_src, the_hash_algo->rawsz);
+}
+
+/* Like oidcpy() but zero-pads the unused bytes in dst's hash array. */
+static inline void oidcpy_with_padding(struct object_id *dst,
+				       const struct object_id *src)
+{
+	size_t hashsz;
+
+	if (!src->algo)
+		hashsz = the_hash_algo->rawsz;
+	else
+		hashsz = hash_algos[src->algo].rawsz;
+
+	memcpy(dst->hash, src->hash, hashsz);
+	memset(dst->hash + hashsz, 0, GIT_MAX_RAWSZ - hashsz);
+	dst->algo = src->algo;
+}
+
+static inline void hashclr(unsigned char *hash)
+{
+	memset(hash, 0, the_hash_algo->rawsz);
+}
+
+static inline void oidclr(struct object_id *oid)
+{
+	memset(oid->hash, 0, GIT_MAX_RAWSZ);
+	oid->algo = hash_algo_by_ptr(the_hash_algo);
+}
+
+static inline void oidread(struct object_id *oid, const unsigned char *hash)
+{
+	memcpy(oid->hash, hash, the_hash_algo->rawsz);
+	oid->algo = hash_algo_by_ptr(the_hash_algo);
+}
+
+static inline int is_empty_blob_sha1(const unsigned char *sha1)
+{
+	return hasheq(sha1, the_hash_algo->empty_blob->hash);
+}
+
+static inline int is_empty_blob_oid(const struct object_id *oid)
+{
+	return oideq(oid, the_hash_algo->empty_blob);
+}
+
+static inline int is_empty_tree_sha1(const unsigned char *sha1)
+{
+	return hasheq(sha1, the_hash_algo->empty_tree->hash);
+}
+
+static inline int is_empty_tree_oid(const struct object_id *oid)
+{
+	return oideq(oid, the_hash_algo->empty_tree);
+}
+
+#endif