1 files changed, 69 insertions, 0 deletions
diff --git a/src/libgit2/patch_generate.h b/src/libgit2/patch_generate.h
new file mode 100644
index 000000000..56e3e9df4
--- /dev/null
+++ b/src/libgit2/patch_generate.h
@@ -0,0 +1,69 @@
+/*
+ * 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_patch_generate_h__
+#define INCLUDE_patch_generate_h__
+
+#include "common.h"
+
+#include "diff.h"
+#include "diff_file.h"
+#include "patch.h"
+
+enum {
+	GIT_PATCH_GENERATED_ALLOCATED = (1 << 0),
+	GIT_PATCH_GENERATED_INITIALIZED = (1 << 1),
+	GIT_PATCH_GENERATED_LOADED = (1 << 2),
+	/* the two sides are different */
+	GIT_PATCH_GENERATED_DIFFABLE = (1 << 3),
+	/* the difference between the two sides has been computed */
+	GIT_PATCH_GENERATED_DIFFED = (1 << 4),
+	GIT_PATCH_GENERATED_FLATTENED = (1 << 5)
+};
+
+struct git_patch_generated {
+	struct git_patch base;
+
+	git_diff *diff; /* for refcount purposes, maybe NULL for blob diffs */
+	size_t delta_index;
+	git_diff_file_content ofile;
+	git_diff_file_content nfile;
+	uint32_t flags;
+	git_pool flattened;
+};
+
+typedef struct git_patch_generated git_patch_generated;
+
+extern git_diff_driver *git_patch_generated_driver(git_patch_generated *);
+
+extern int git_patch_generated_old_data(
+	char **, long *, git_patch_generated *);
+extern int git_patch_generated_new_data(
+	char **, long *, git_patch_generated *);
+extern int git_patch_generated_from_diff(
+	git_patch **, git_diff *, size_t);
+
+typedef struct git_patch_generated_output git_patch_generated_output;
+
+struct git_patch_generated_output {
+	/* these callbacks are issued with the diff data */
+	git_diff_file_cb file_cb;
+	git_diff_binary_cb binary_cb;
+	git_diff_hunk_cb hunk_cb;
+	git_diff_line_cb data_cb;
+	void *payload;
+
+	/* this records the actual error in cases where it may be obscured */
+	int error;
+
+	/* this callback is used to do the diff and drive the other callbacks.
+	 * see diff_xdiff.h for how to use this in practice for now.
+	 */
+	int (*diff_cb)(git_patch_generated_output *output,
+		git_patch_generated *patch);
+};
+
+#endif