Import regex from OpenBSD
Change-Id: I7ad7d907ef65e4e345f94777d730813b1270a612
diff --git a/libc/regex/cclass.h b/libc/regex/cclass.h
new file mode 100644
index 0000000..d105491
--- /dev/null
+++ b/libc/regex/cclass.h
@@ -0,0 +1,68 @@
+/* $OpenBSD: cclass.h,v 1.5 2003/06/02 20:18:36 millert Exp $ */
+
+/*-
+ * Copyright (c) 1992, 1993, 1994 Henry Spencer.
+ * Copyright (c) 1992, 1993, 1994
+ * The Regents of the University of California. All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Henry Spencer.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * @(#)cclass.h 8.3 (Berkeley) 3/20/94
+ */
+
+/* character-class table */
+static const struct cclass {
+ char *name;
+ char *chars;
+ char *multis;
+} cclasses[] = {
+ { "alnum", "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz\
+0123456789", ""} ,
+ { "alpha", "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz",
+ ""} ,
+ { "blank", " \t", ""} ,
+ { "cntrl", "\007\b\t\n\v\f\r\1\2\3\4\5\6\16\17\20\21\22\23\24\
+\25\26\27\30\31\32\33\34\35\36\37\177", ""} ,
+ { "digit", "0123456789", ""} ,
+ { "graph", "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz\
+0123456789!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~",
+ ""} ,
+ { "lower", "abcdefghijklmnopqrstuvwxyz",
+ ""} ,
+ { "print", "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz\
+0123456789!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~ ",
+ ""} ,
+ { "punct", "!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~",
+ ""} ,
+ { "space", "\t\n\v\f\r ", ""} ,
+ { "upper", "ABCDEFGHIJKLMNOPQRSTUVWXYZ",
+ ""} ,
+ { "xdigit", "0123456789ABCDEFabcdef",
+ ""} ,
+ { NULL, 0, "" }
+};