BLI_path: add BLI_path_append_dir (appends and ensures trailing slash)

Avoid copying the string then calling BLI_path_slash_ensure afterwards.

1 files changed, 8 insertions, 1 deletions

diff --git a/source/blender/blenlib/BLI_path_util.h b/source/blender/blenlib/BLI_path_util.h
index 9c661178322..6d411b51f85 100644
--- a/source/blender/blenlib/BLI_path_util.h
+++ b/source/blender/blenlib/BLI_path_util.h
@@ -68,8 +68,15 @@ const char *BLI_path_extension(const char *filepath) ATTR_NONNULL();
 
 /**
  * Append a filename to a dir, ensuring slash separates.
+ * \return The new length of `dst`.
  */
-void BLI_path_append(char *__restrict dst, size_t maxlen, const char *__restrict file)
+size_t BLI_path_append(char *__restrict dst, size_t maxlen, const char *__restrict file)
+    ATTR_NONNULL();
+/**
+ * A version of #BLI_path_append that ensures a trailing slash if there is space in `dst`.
+ * \return The new length of `dst`.
+ */
+size_t BLI_path_append_dir(char *__restrict dst, size_t maxlen, const char *__restrict dir)
     ATTR_NONNULL();
 
 /**