dovecot-1.2: Added some UTF16_ macros for helping UTF-16 convers...

dovecot at dovecot.org dovecot at dovecot.org
Sat Nov 1 21:12:05 EET 2008


details:   http://hg.dovecot.org/dovecot-1.2/rev/fcce76948c8a
changeset: 8378:fcce76948c8a
user:      Timo Sirainen <tss at iki.fi>
date:      Sat Nov 01 21:07:12 2008 +0200
description:
Added some UTF16_ macros for helping UTF-16 conversions.

diffstat:

1 file changed, 18 insertions(+)
src/lib/unichar.h |   18 ++++++++++++++++++

diffs (28 lines):

diff -r a76540e6d773 -r fcce76948c8a src/lib/unichar.h
--- a/src/lib/unichar.h	Sat Nov 01 18:23:17 2008 +0200
+++ b/src/lib/unichar.h	Sat Nov 01 21:07:12 2008 +0200
@@ -3,6 +3,24 @@
 
 /* Character used to replace invalid input. */
 #define UNICODE_REPLACEMENT_CHAR 0xfffd
+
+/* Characters >= base require surrogates */
+#define UTF16_SURROGATE_BASE 0x10000
+
+#define UTF16_SURROGATE_SHIFT 10
+#define UTF16_SURROGATE_MASK 0x03ff
+#define UTF16_SURROGATE_HIGH_FIRST 0xd800
+#define UTF16_SURROGATE_HIGH_LAST 0xdbff
+#define UTF16_SURROGATE_HIGH_MAX 0xdfff
+#define UTF16_SURROGATE_LOW_FIRST 0xdc00
+#define UTF16_SURROGATE_LOW_LAST 0xdfff
+
+#define UTF16_SURROGATE_HIGH(chr) \
+	(UTF16_SURROGATE_HIGH_FIRST + \
+	 (((chr) - UTF16_SURROGATE_BASE) >> UTF16_SURROGATE_SHIFT))
+#define UTF16_SURROGATE_LOW(chr) \
+	(UTF16_SURROGATE_LOW_FIRST + \
+	 (((chr) - UTF16_SURROGATE_BASE) & UTF16_SURROGATE_MASK))
 
 typedef uint32_t unichar_t;
 ARRAY_DEFINE_TYPE(unichars, unichar_t);


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