Expose patch serialization to git_buf

Returning library-allocated strings from libgit2 works fine on Linux,
but may cause problems on Windows because there is no one C Runtime that
everything links against. With libgit2 not exposing its own allocator,
freeing the string is a gamble.

git_patch_to_str already serializes to a buffer, then returns the
underlying memory. Expose the functionality directly, so callers can use
the git_buf_free function to free the memory later.

1 files changed, 10 insertions, 0 deletions

diff --git a/include/git2/patch.h b/include/git2/patch.h
index e09f625c0..e5dd5d8d4 100644
--- a/include/git2/patch.h
+++ b/include/git2/patch.h
@@ -242,6 +242,16 @@ GIT_EXTERN(int) git_patch_to_str(
 	char **string,
 	git_patch *patch);
 
+/**
+ * Get the content of a patch as a single diff text.
+ *
+ * @param out The git_buf to be filled in
+ * @param patch A git_patch representing changes to one file
+ * @return 0 on success, <0 on failure.
+ */
+GIT_EXTERN(int) git_patch_to_buf(
+	git_buf *out,
+	git_patch *patch);
 
 GIT_END_DECL