1 files changed, 75 insertions, 0 deletions
diff --git a/src/diff_patch.h b/src/diff_patch.h
new file mode 100644
index 000000000..7de6e1e5b
--- /dev/null
+++ b/src/diff_patch.h
@@ -0,0 +1,75 @@
+/*
+ * 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_diff_patch_h__
+#define INCLUDE_diff_patch_h__
+
+#include "common.h"
+#include "diff.h"
+#include "diff_file.h"
+#include "array.h"
+
+/* cached information about a single span in a diff */
+typedef struct diff_patch_line diff_patch_line;
+struct diff_patch_line {
+	const char *ptr;
+	size_t len;
+	size_t lines, oldno, newno;
+	char origin;
+};
+
+/* cached information about a hunk in a diff */
+typedef struct diff_patch_hunk diff_patch_hunk;
+struct diff_patch_hunk {
+	git_diff_range range;
+	char   header[128];
+	size_t header_len;
+	size_t line_start;
+	size_t line_count;
+};
+
+struct git_diff_patch {
+	git_refcount rc;
+	git_diff_list *diff; /* for refcount purposes, maybe NULL for blob diffs */
+	git_diff_delta *delta;
+	size_t delta_index;
+	git_diff_file_content ofile;
+	git_diff_file_content nfile;
+	uint32_t flags;
+	git_array_t(diff_patch_hunk) hunks;
+	git_array_t(diff_patch_line) lines;
+	size_t oldno, newno;
+	size_t content_size;
+	git_pool flattened;
+};
+
+enum {
+	GIT_DIFF_PATCH_ALLOCATED   = (1 << 0),
+	GIT_DIFF_PATCH_INITIALIZED = (1 << 1),
+	GIT_DIFF_PATCH_LOADED      = (1 << 2),
+	GIT_DIFF_PATCH_DIFFABLE    = (1 << 3),
+	GIT_DIFF_PATCH_DIFFED      = (1 << 4),
+	GIT_DIFF_PATCH_FLATTENED   = (1 << 5),
+};
+
+typedef struct git_diff_output git_diff_output;
+struct git_diff_output {
+	/* these callbacks are issued with the diff data */
+	git_diff_file_cb file_cb;
+	git_diff_hunk_cb hunk_cb;
+	git_diff_data_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_diff_output *output, git_diff_patch *patch);
+};
+
+#endif