Initial revision of libutf library.

Libutf is a port of Plan 9's support library for UTF-8 and Unicode.
Downloaded from http://swtch.com/plan9port/unix/libutf.tgz. No
modifications required to compile.

Change-Id: I5646bc8709bafc14039d30e28a0c69a804e78548

1 files changed, 54 insertions, 0 deletions

diff --git a/utf.h b/utf.h
new file mode 100644
index 0000000..44052f4
--- /dev/null
+++ b/utf.h
@@ -0,0 +1,54 @@
+#ifndef _UTF_H_
+#define _UTF_H_ 1
+#if defined(__cplusplus)
+extern "C" { 
+#endif
+
+typedef unsigned int Rune;	/* 32 bits */
+
+enum
+{
+	UTFmax		= 4,		/* maximum bytes per rune */
+	Runesync	= 0x80,		/* cannot represent part of a UTF sequence (<) */
+	Runeself	= 0x80,		/* rune and UTF sequences are the same (<) */
+	Runeerror	= 0xFFFD,	/* decoding error in UTF */
+	Runemax = 0x10FFFF	/* maximum rune value */
+};
+
+/* Edit .+1,/^$/ | cfn $PLAN9/src/lib9/utf/?*.c | grep -v static |grep -v __ */
+int		chartorune(Rune *rune, char *str);
+int		fullrune(char *str, int n);
+int		isalpharune(Rune c);
+int		islowerrune(Rune c);
+int		isspacerune(Rune c);
+int		istitlerune(Rune c);
+int		isupperrune(Rune c);
+int		runelen(long c);
+int		runenlen(Rune *r, int nrune);
+Rune*		runestrcat(Rune *s1, Rune *s2);
+Rune*		runestrchr(Rune *s, Rune c);
+int		runestrcmp(Rune *s1, Rune *s2);
+Rune*		runestrcpy(Rune *s1, Rune *s2);
+Rune*		runestrdup(Rune *s) ;
+Rune*		runestrecpy(Rune *s1, Rune *es1, Rune *s2);
+long		runestrlen(Rune *s);
+Rune*		runestrncat(Rune *s1, Rune *s2, long n);
+int		runestrncmp(Rune *s1, Rune *s2, long n);
+Rune*		runestrncpy(Rune *s1, Rune *s2, long n);
+Rune*		runestrrchr(Rune *s, Rune c);
+Rune*		runestrstr(Rune *s1, Rune *s2);
+int		runetochar(char *str, Rune *rune);
+Rune		tolowerrune(Rune c);
+Rune		totitlerune(Rune c);
+Rune		toupperrune(Rune c);
+char*		utfecpy(char *to, char *e, char *from);
+int		utflen(char *s);
+int		utfnlen(char *s, long m);
+char*		utfrrune(char *s, long c);
+char*		utfrune(char *s, long c);
+char*		utfutf(char *s1, char *s2);
+
+#if defined(__cplusplus)
+}
+#endif
+#endif