RNA: support extracting names from paths without allocating memory

Support extracting identifiers RNA paths into fixed size buffer
since the maximum size of the identifier is known all cases.

- Add BLI_str_unescape_ex to support limiting the destination buffer.
- Add BLI_str_quoted_substr to copy values into a fixed size buffer.

1 files changed, 4 insertions, 5 deletions

diff --git a/source/blender/editors/animation/keyframes_general.c b/source/blender/editors/animation/keyframes_general.c
index 9f3fe239113..ec33a42af3b 100644
--- a/source/blender/editors/animation/keyframes_general.c
+++ b/source/blender/editors/animation/keyframes_general.c
@@ -761,11 +761,10 @@ short copy_animedit_keys(bAnimContext *ac, ListBase *anim_data)
     if ((aci->id_type == ID_OB) && (((Object *)aci->id)->type == OB_ARMATURE) && aci->rna_path) {
       Object *ob = (Object *)aci->id;
 
-      char *bone_name = BLI_str_quoted_substrN(aci->rna_path, "pose.bones[");
-      if (bone_name) {
-        bPoseChannel *pchan = BKE_pose_channel_find_name(ob->pose, bone_name);
-        MEM_freeN(bone_name);
-
+      bPoseChannel *pchan;
+      char bone_name[sizeof(pchan->name)];
+      if (BLI_str_quoted_substr(aci->rna_path, "pose.bones[", bone_name, sizeof(bone_name))) {
+        pchan = BKE_pose_channel_find_name(ob->pose, bone_name);
         if (pchan) {
           aci->is_bone = true;
         }