Allow inserting non-BMP characters

* src/coding.h (UTF_16_HIGH_SURROGATE_P, UTF_16_LOW_SURROGATE_P): Move
from coding.c and document.
(surrogates_to_codepoint): New function.

* src/nsterm.m (insertText:): Properly handle surrogate pairs.

(cherry picked from commit 703ac3ea1c1ce381f385469a0e88bc29d3fe83c2)

1 files changed, 0 insertions, 7 deletions

diff --git a/src/coding.c b/src/coding.c
index b1eb2edb497..867f84de609 100644
--- a/src/coding.c
+++ b/src/coding.c
@@ -1518,13 +1518,6 @@ encode_coding_utf_8 (struct coding_system *coding)
 /* See the above "GENERAL NOTES on `detect_coding_XXX ()' functions".
    Return true if a text is encoded in one of UTF-16 based coding systems.  */
 
-#define UTF_16_HIGH_SURROGATE_P(val) \
-  (((val) & 0xFC00) == 0xD800)
-
-#define UTF_16_LOW_SURROGATE_P(val) \
-  (((val) & 0xFC00) == 0xDC00)
-
-
 static bool
 detect_coding_utf_16 (struct coding_system *coding,
                       struct coding_detection_info *detect_info)