Add some BLI helpers needed by asset branch.

`BLI_strncpy_ensure_pad()` is also useful with current master code.

The two others (`BLI_strcmp_ignore_pad()` and `BLI_filelist_duplicate()`)
are only used in asset branch currently, but think they could be useful
in other places too, and simplifies handling of asset branch & future patch review.

Reviewers: campbellbarton

Reviewed By: campbellbarton

Differential Revision: https://developer.blender.org/D965

1 files changed, 34 insertions, 1 deletions

diff --git a/source/blender/blenlib/intern/storage.c b/source/blender/blenlib/intern/storage.c
index c062d62bca5..78057b1655f 100644
--- a/source/blender/blenlib/intern/storage.c
+++ b/source/blender/blenlib/intern/storage.c
@@ -409,7 +409,40 @@ unsigned int BLI_dir_contents(const char *dirname,  struct direntry **filelist)
 	return dir_ctx.nrfiles;
 }
 
-/* frees storage for an array of direntries, including the array itself. */
+/**
+ * Deep-duplicate of an array of direntries, including the array itself.
+ *
+ * \param dup_poin If given, called for each non-NULL direntry->poin. Otherwise, pointer is always simply copied over.
+ */
+void BLI_filelist_duplicate(
+        struct direntry **dest_filelist, struct direntry *src_filelist, unsigned int nrentries,
+        void *(*dup_poin)(void *))
+{
+	unsigned int i;
+
+	*dest_filelist = malloc(sizeof(**dest_filelist) * (size_t)(nrentries));
+	for (i = 0; i < nrentries; ++i) {
+		struct direntry * const src = &src_filelist[i];
+		struct direntry *dest = &(*dest_filelist)[i];
+		*dest = *src;
+		if (dest->image) {
+			dest->image = IMB_dupImBuf(src->image);
+		}
+		if (dest->relname) {
+			dest->relname = MEM_dupallocN(src->relname);
+		}
+		if (dest->path) {
+			dest->path = MEM_dupallocN(src->path);
+		}
+		if (dest->poin && dup_poin) {
+			dest->poin = dup_poin(src->poin);
+		}
+	}
+}
+
+/**
+ * frees storage for an array of direntries, including the array itself.
+ */
 void BLI_free_filelist(struct direntry *filelist, unsigned int nrentries)
 {
 	unsigned int i;