1 files changed, 60 insertions, 19 deletions

diff --git a/hex.c b/hex.c
index 7850a8879d..4f64d34696 100644
--- a/hex.c
+++ b/hex.c
@@ -47,32 +47,76 @@ int hex_to_bytes(unsigned char *binary, const char *hex, size_t len)
 	return 0;
 }
 
-int get_sha1_hex(const char *hex, unsigned char *sha1)
+static int get_hash_hex_algop(const char *hex, unsigned char *hash,
+			      const struct git_hash_algo *algop)
 {
 	int i;
-	for (i = 0; i < the_hash_algo->rawsz; i++) {
+	for (i = 0; i < algop->rawsz; i++) {
 		int val = hex2chr(hex);
 		if (val < 0)
 			return -1;
-		*sha1++ = val;
+		*hash++ = val;
 		hex += 2;
 	}
 	return 0;
 }
 
+int get_sha1_hex(const char *hex, unsigned char *sha1)
+{
+	return get_hash_hex_algop(hex, sha1, the_hash_algo);
+}
+
+int get_oid_hex_algop(const char *hex, struct object_id *oid,
+		      const struct git_hash_algo *algop)
+{
+	int ret = get_hash_hex_algop(hex, oid->hash, algop);
+	if (!ret)
+		oid_set_algo(oid, algop);
+	return ret;
+}
+
+/*
+ * NOTE: This function relies on hash algorithms being in order from shortest
+ * length to longest length.
+ */
+int get_oid_hex_any(const char *hex, struct object_id *oid)
+{
+	int i;
+	for (i = GIT_HASH_NALGOS - 1; i > 0; i--) {
+		if (!get_oid_hex_algop(hex, oid, &hash_algos[i]))
+			return i;
+	}
+	return GIT_HASH_UNKNOWN;
+}
+
 int get_oid_hex(const char *hex, struct object_id *oid)
 {
-	return get_sha1_hex(hex, oid->hash);
+	return get_oid_hex_algop(hex, oid, the_hash_algo);
 }
 
-int parse_oid_hex(const char *hex, struct object_id *oid, const char **end)
+int parse_oid_hex_algop(const char *hex, struct object_id *oid,
+			const char **end,
+			const struct git_hash_algo *algop)
 {
-	int ret = get_oid_hex(hex, oid);
+	int ret = get_oid_hex_algop(hex, oid, algop);
 	if (!ret)
-		*end = hex + the_hash_algo->hexsz;
+		*end = hex + algop->hexsz;
+	return ret;
+}
+
+int parse_oid_hex_any(const char *hex, struct object_id *oid, const char **end)
+{
+	int ret = get_oid_hex_any(hex, oid);
+	if (ret)
+		*end = hex + hash_algos[ret].hexsz;
 	return ret;
 }
 
+int parse_oid_hex(const char *hex, struct object_id *oid, const char **end)
+{
+	return parse_oid_hex_algop(hex, oid, end, the_hash_algo);
+}
+
 char *hash_to_hex_algop_r(char *buffer, const unsigned char *hash,
 			  const struct git_hash_algo *algop)
 {
@@ -80,6 +124,13 @@ char *hash_to_hex_algop_r(char *buffer, const unsigned char *hash,
 	char *buf = buffer;
 	int i;
 
+	/*
+	 * Our struct object_id has been memset to 0, so default to printing
+	 * using the default hash.
+	 */
+	if (algop == &hash_algos[0])
+		algop = the_hash_algo;
+
 	for (i = 0; i < algop->rawsz; i++) {
 		unsigned int val = *hash++;
 		*buf++ = hex[val >> 4];
@@ -90,14 +141,9 @@ char *hash_to_hex_algop_r(char *buffer, const unsigned char *hash,
 	return buffer;
 }
 
-char *sha1_to_hex_r(char *buffer, const unsigned char *sha1)
-{
-	return hash_to_hex_algop_r(buffer, sha1, &hash_algos[GIT_HASH_SHA1]);
-}
-
 char *oid_to_hex_r(char *buffer, const struct object_id *oid)
 {
-	return hash_to_hex_algop_r(buffer, oid->hash, the_hash_algo);
+	return hash_to_hex_algop_r(buffer, oid->hash, &hash_algos[oid->algo]);
 }
 
 char *hash_to_hex_algop(const unsigned char *hash, const struct git_hash_algo *algop)
@@ -108,11 +154,6 @@ char *hash_to_hex_algop(const unsigned char *hash, const struct git_hash_algo *a
 	return hash_to_hex_algop_r(hexbuffer[bufno], hash, algop);
 }
 
-char *sha1_to_hex(const unsigned char *sha1)
-{
-	return hash_to_hex_algop(sha1, &hash_algos[GIT_HASH_SHA1]);
-}
-
 char *hash_to_hex(const unsigned char *hash)
 {
 	return hash_to_hex_algop(hash, the_hash_algo);
@@ -120,5 +161,5 @@ char *hash_to_hex(const unsigned char *hash)
 
 char *oid_to_hex(const struct object_id *oid)
 {
-	return hash_to_hex_algop(oid->hash, the_hash_algo);
+	return hash_to_hex_algop(oid->hash, &hash_algos[oid->algo]);
 }