summaryrefslogtreecommitdiff
path: root/lib/unistr/u16-uctomb.c
diff options
context:
space:
mode:
authorAndreas Rottmann <a.rottmann@gmx.at>2009-09-14 12:32:44 +0200
committerAndreas Rottmann <a.rottmann@gmx.at>2009-09-14 12:32:44 +0200
commitfa095a4504cbe668e4244547e2c141597bea4ecf (patch)
tree06135820a286ffec47804e75fbf8a147e92acd2e /lib/unistr/u16-uctomb.c
Imported Upstream version 0.9.1upstream/0.9.1
Diffstat (limited to 'lib/unistr/u16-uctomb.c')
-rw-r--r--lib/unistr/u16-uctomb.c72
1 files changed, 72 insertions, 0 deletions
diff --git a/lib/unistr/u16-uctomb.c b/lib/unistr/u16-uctomb.c
new file mode 100644
index 00000000..6ac5ada5
--- /dev/null
+++ b/lib/unistr/u16-uctomb.c
@@ -0,0 +1,72 @@
+/* Store a character in UTF-16 string.
+ Copyright (C) 2002, 2005-2006, 2009 Free Software Foundation, Inc.
+ Written by Bruno Haible <bruno@clisp.org>, 2002.
+
+ This program is free software: you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published
+ by the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+#include <config.h>
+
+#if defined IN_LIBUNISTRING
+/* Tell unistr.h to declare u16_uctomb as 'extern', not 'static inline'. */
+# include "unistring-notinline.h"
+#endif
+
+/* Specification. */
+#include "unistr.h"
+
+#if !HAVE_INLINE
+
+int
+u16_uctomb (uint16_t *s, ucs4_t uc, int n)
+{
+ if (uc < 0xd800)
+ {
+ if (n > 0)
+ {
+ s[0] = uc;
+ return 1;
+ }
+ /* else return -2, below. */
+ }
+ else if (uc < 0x10000)
+ {
+ if (uc >= 0xe000)
+ {
+ if (n >= 1)
+ {
+ s[0] = uc;
+ return 1;
+ }
+ }
+ else
+ return -1;
+ }
+ else
+ {
+ if (uc < 0x110000)
+ {
+ if (n >= 2)
+ {
+ s[0] = 0xd800 + ((uc - 0x10000) >> 10);
+ s[1] = 0xdc00 + ((uc - 0x10000) & 0x3ff);
+ return 2;
+ }
+ }
+ else
+ return -1;
+ }
+ return -2;
+}
+
+#endif