GitLab

 src/bidi.c (bidi_push_it, bidi_pop_it): New functions.
 (bidi_initialize): Initialize the bidi cache start stack pointer.
 (bidi_cache_ensure_space): New function, refactored from part of
 bidi_cache_iterator_state.
 src/dispextern.h (bidi_push_it, bidi_pop_it): Add prototypes.