--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mcabber/mcabber/utf8.c	Mon Jan 18 15:36:19 2010 +0200
@@ -0,0 +1,98 @@
+/*
+ * utf8.c       -- UTF-8 routines
+ *
+ * Copyright (C) 2006 Reimar Döffinger <Reimar.Doeffinger@stud.uni-karlsruhe.de>
+ *
+ * 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 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
+ * 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 "utf8.h"
+
+char *prev_char(char *str, const char *limit)
+{
+  if (str <= limit)
+    return str;
+  str--;
+  if (utf8_mode)
+    while ((str > limit) && ((*str & 0xc0) == 0x80))
+      str--;
+  return str;
+}
+
+char *next_char(char *str)
+{
+  if (!*str)
+    return str;
+  str++;
+  if (utf8_mode)
+    while ((*str & 0xc0) == 0x80)
+      str++;
+  return str;
+}
+
+unsigned get_char(const char *str)
+{
+  unsigned char *strp = (unsigned char *)str;
+  unsigned c = *strp++;
+  unsigned mask = 0x80;
+  int len = -1;
+  if (!utf8_mode)
+    return c;
+  while (c & mask) {
+    mask >>= 1;
+    len++;
+  }
+  if (len <= 0 || len > 4)
+    goto no_utf8;
+  c &= mask - 1;
+  while ((*strp & 0xc0) == 0x80) {
+    if (len-- <= 0)
+      goto no_utf8;
+    c = (c << 6) | (*strp++ & 0x3f);
+  }
+  if (len)
+    goto no_utf8;
+  return c;
+
+no_utf8:
+  return *str;
+}
+
+char *put_char(char *str, unsigned c)
+{
+  int mask = 0xffffffc0;
+  int i = 4;
+  char code[5];
+  if (!utf8_mode || c < 128) {
+    *str++ = c;
+    return str;
+  }
+  while (c & mask) {
+    code[i--] = 0x80 | (c & 0x3f);
+    c >>= 6;
+    mask >>= 1;
+    if (i < 0) {
+      *str++ = '?';
+      return str;
+    }
+  }
+  code[i] = (mask << 1) | c;
+  for (; i < 5; i++)
+    *str++ = code[i];
+  return str;
+}
+
+/* vim: set expandtab cindent cinoptions=>2\:2(0:  For Vim users... */