introduce `git_diff_from_buffer` to parse diffs

Parse diff files into a `git_diff` structure.

1 files changed, 29 insertions, 0 deletions

diff --git a/src/patch_parse.h b/src/patch_parse.h
index d5e86073f..da56dad7c 100644
--- a/src/patch_parse.h
+++ b/src/patch_parse.h
@@ -7,6 +7,31 @@
 #ifndef INCLUDE_patch_parse_h__
 #define INCLUDE_patch_parse_h__
 
+typedef struct {
+	git_refcount rc;
+
+	/* Original content buffer */
+	const char *content;
+	size_t content_len;
+
+	git_patch_options opts;
+
+	/* The remaining (unparsed) buffer */
+	const char *remain;
+	size_t remain_len;
+
+	const char *line;
+	size_t line_len;
+	size_t line_num;
+} git_patch_parse_ctx;
+
+extern git_patch_parse_ctx *git_patch_parse_ctx_init(
+	const char *content,
+	size_t content_len,
+	const git_patch_options *opts);
+
+extern void git_patch_parse_ctx_free(git_patch_parse_ctx *ctx);
+
 /**
  * Create a patch for a single file from the contents of a patch buffer.
  *
@@ -22,4 +47,8 @@ extern int git_patch_from_buffer(
 	size_t contents_len,
 	const git_patch_options *opts);
 
+extern int git_patch_parse(
+	git_patch **out,
+	git_patch_parse_ctx *ctx);
+
 #endif