hash: move SHA1 implementations into 'sha1/' folder

As we will include additional hash algorithms in the future due
to upstream git discussing a move away from SHA1, we should
accomodate for that and prepare for the move. As a first step,
move all SHA1 implementations into a common subdirectory.

Also, create a SHA1-specific header file that lives inside the
hash folder. This header will contain the SHA1-specific header
includes, function declarations and the SHA1 context structure.

1 files changed, 19 insertions, 0 deletions

diff --git a/src/hash/sha1/generic.h b/src/hash/sha1/generic.h
new file mode 100644
index 000000000..041b9ef68
--- /dev/null
+++ b/src/hash/sha1/generic.h
@@ -0,0 +1,19 @@
+/*
+ * 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_sha1_generic_h__
+#define INCLUDE_hash_sha1_generic_h__
+
+#include "hash.h"
+
+struct git_hash_ctx {
+	unsigned long long size;
+	unsigned int H[5];
+	unsigned int W[16];
+};
+
+#endif