From 9a4521cada37e06f5c5840060ced1c430b0b2abb Mon Sep 17 00:00:00 2001 From: Kenichi Handa Date: Tue, 30 Dec 2008 23:42:15 +0000 Subject: [PATCH] (CHAR_VARIATION_SELECTOR_P): New macro. (CHAR_SURROGATE_PAIR_P): New macro. --- src/character.h | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/src/character.h b/src/character.h index 34e696e5083..a766b767eb3 100644 --- a/src/character.h +++ b/src/character.h @@ -610,6 +610,26 @@ extern char unibyte_has_multibyte_table[256]; ? ASCII_CHAR_WIDTH (c) \ : XINT (CHAR_TABLE_REF (Vchar_width_table, c))) +/* If C is a variation selector, return the index numnber of the + variation selector (1..256). Otherwise, return 0. */ + +#define CHAR_VARIATION_SELECTOR_P(c) \ + ((c) < 0xFE00 ? 0 \ + : (c) <= 0xFE0F ? (c) - 0xFE00 + 1 \ + : (c) < 0xE0100 ? 0 \ + : (c) <= 0xE01EF ? (c) - 0xE0100 + 17 \ + : 0) + +/* If C is a high surrogate, return 1. If C is a low surrogate, + return 0. Otherwise, return 0. */ + +#define CHAR_SURROGATE_PAIR_P(c) \ + ((c) < 0xD800 ? 0 \ + : (c) <= 0xDBFF ? 1 \ + : (c) <= 0xDFFF ? 2 \ + : 0) + + extern int char_resolve_modifier_mask P_ ((int)); extern int char_string P_ ((unsigned, unsigned char *)); extern int string_char P_ ((const unsigned char *, -- 2.30.2