Move lib/utf16-ucs4.h to gettext-tools/lib/utf16-ucs4.h.

1 files changed, 63 insertions, 0 deletions

diff --git a/gettext-tools/lib/utf16-ucs4.h b/gettext-tools/lib/utf16-ucs4.h
new file mode 100644
index 0000000..48caab4
--- /dev/null
+++ b/gettext-tools/lib/utf16-ucs4.h
@@ -0,0 +1,63 @@
+/* Conversion UTF-16 to UCS-4.
+   Copyright (C) 2001-2002 Free Software Foundation, Inc.
+   Written by Bruno Haible <haible@clisp.cons.org>, 2001.
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, 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 General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+
+
+#include <stddef.h>
+
+/* Return the length (number of units) of the first character in S, putting
+   its 'ucs4_t' representation in *PUC.  */
+static int
+u16_mbtouc_aux (unsigned int *puc, const unsigned short *s, size_t n)
+{
+  unsigned short c = *s;
+
+  if (c < 0xdc00)
+    {
+      if (n >= 2)
+        {
+          if (s[1] >= 0xdc00 && s[1] < 0xe000)
+            {
+              *puc = 0x10000 + ((c - 0xd800) << 10) + (s[1] - 0xdc00);
+              return 2;
+            }
+          /* invalid multibyte character */
+        }
+      else
+        {
+          /* incomplete multibyte character */
+          *puc = 0xfffd;
+          return n;
+        }
+    }
+  /* invalid multibyte character */
+  *puc = 0xfffd;
+  return 1;
+}
+static inline int
+u16_mbtouc (unsigned int *puc, const unsigned short *s, size_t n)
+{
+  unsigned short c = *s;
+
+  if (c < 0xd800 || c >= 0xe000)
+    {
+      *puc = c;
+      return 1;
+    }
+  else
+    return u16_mbtouc_aux (puc, s, n);
+}