Added to bidi.c support functions for reordering display strings.

 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.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/dispextern.h b/src/dispextern.h
index 5cb28fa0f7a..acd7862e5dc 100644
--- a/src/dispextern.h
+++ b/src/dispextern.h
@@ -2962,6 +2962,8 @@ extern void bidi_init_it (EMACS_INT, EMACS_INT, int, struct bidi_it *);
 extern void bidi_move_to_visually_next (struct bidi_it *);
 extern void bidi_paragraph_init (bidi_dir_t, struct bidi_it *, int);
 extern int  bidi_mirror_char (int);
+extern void bidi_push_it (struct bidi_it *);
+extern void bidi_pop_it (struct bidi_it *);
 
 /* Defined in xdisp.c */