1 files changed, 46 insertions, 0 deletions
diff --git a/util/hash.h b/util/hash.h
new file mode 100644
index 000000000..b7bbdab74
--- /dev/null
+++ b/util/hash.h
@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#ifndef INCLUDE_hash_h__
+#define INCLUDE_hash_h__
+
+#include "util_common.h"
+
+#include "git2/oid.h"
+
+typedef struct {
+	void *data;
+	size_t len;
+} git_buf_vec;
+
+typedef enum {
+	GIT_HASH_ALGO_UNKNOWN = 0,
+	GIT_HASH_ALGO_SHA1,
+} git_hash_algo_t;
+
+#include "hash/sha1.h"
+
+typedef struct git_hash_ctx {
+	union {
+		git_hash_sha1_ctx sha1;
+	};
+	git_hash_algo_t algo;
+} git_hash_ctx;
+
+int git_hash_global_init(void);
+
+int git_hash_ctx_init(git_hash_ctx *ctx);
+void git_hash_ctx_cleanup(git_hash_ctx *ctx);
+
+int git_hash_init(git_hash_ctx *c);
+int git_hash_update(git_hash_ctx *c, const void *data, size_t len);
+int git_hash_final(git_oid *out, git_hash_ctx *c);
+
+int git_hash_buf(git_oid *out, const void *data, size_t len);
+int git_hash_vec(git_oid *out, git_buf_vec *vec, size_t n);
+
+#endif