Import libutf from http://git.suckless.org/libutf

utf.h

@@ -0,0 +1,51 @@
+/* MIT/X Consortium Copyright (c) 2012 Connor Lane Smith <cls@lubutu.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include <stddef.h>
+
+typedef int Rune;
+
+enum {
+	UTFmax    = 6,       /* maximum bytes per rune */
+	Runeself  = 0x80,    /* rune and utf are equal (<) */
+	Runeerror = 0xFFFD,  /* decoding error in utf */
+	Runemax   = 0x10FFFF /* maximum rune value */
+};
+
+int runetochar(char *, const Rune *);
+int chartorune(Rune *, const char *);
+int charntorune(Rune *, const char *, size_t);
+int runelen(const Rune);
+size_t runenlen(const Rune *, size_t);
+int fullrune(const char *, size_t);
+char *utfecpy(char *, char *, const char *);
+size_t utflen(const char *);
+size_t utfnlen(const char *, size_t);
+char *utfrune(const char *, Rune);
+char *utfrrune(const char *, Rune);
+char *utfutf(const char *, const char *);
+
+int isalpharune(Rune);
+int islowerrune(Rune);
+int isspacerune(Rune);
+int istitlerune(Rune);
+int isupperrune(Rune);
+int isdigitrune(Rune);