Replace regex files with multibyte-aware version from FreeBSD.

	* Makefile.in (install-headers): Remove extra command to install
	regex.h.
	(uninstall-headers): Remove extra command to uninstall regex.h.
	* nlsfuncs.cc (collate_lcid): Make externally available to allow
	access to collation internals from regex functions.
	(collate_charset): Ditto.
	* wchar.h: Add __cplusplus guards to make C-clean.
	* include/regex.h: New file, replacing regex/regex.h.  Remove UCB
	advertising clause.
	* regex/COPYRIGHT: Accommodate BSD license.  Remove UCB advertising
	clause.
	* regex/cclass.h: Remove.
	* regex/cname.h: New file from FreeBSD.
	* regex/engine.c: Ditto.
	(NONCHAR): Tweak for Cygwin.
	* regex/engine.ih: Remove.
	* regex/mkh: Remove.
	* regex/regcomp.c: New file from FreeBSD.  Tweak slightly for Cygwin.
	Import required collate internals from nlsfunc.cc.
	(p_ere_exp): Add GNU-specific \< and \> handling for word boundaries.
	(p_simp_re): Ditto.
	(__collate_range_cmp): Define.
	(p_b_term): Use Cygwin-specific collate internals.
	(findmust): Ditto.
	* regex/regcomp.ih: Remove.
	* regex/regerror.c: New file from FreeBSD.  Fix a few compiler warnings.
	* regex/regerror.ih: Remove.
	* regex/regex.7: New file from FreeBSD.  Remove UCB advertising clause.
	* regex/regex.h: Remove.  Replaced by include/regex.h.
	* regex/regexec.c: New file from FreeBSD.  Fix a few compiler warnings.
	* regex/regfree.c: New file from FreeBSD.
	* regex/tests: Remove.
	* regex/utils.h: New file from FreeBSD.

1 files changed, 115 insertions, 57 deletions

diff --git a/winsup/cygwin/regex/regex2.h b/winsup/cygwin/regex/regex2.h
index 176038ab0..13bbf64a7 100644
--- a/winsup/cygwin/regex/regex2.h
+++ b/winsup/cygwin/regex/regex2.h
@@ -1,6 +1,42 @@
+/*-
+ * 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.
+ * 4. 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.
+ *
+ *	@(#)regex2.h	8.4 (Berkeley) 3/20/94
+ * $FreeBSD: src/lib/libc/regex/regex2.h,v 1.11 2007/01/09 00:28:04 imp Exp $
+ */
+
 /*
  * First, the stuff that ends up in the outside-world include file
- = typedef _off_t regoff_t;
+ = typedef off_t regoff_t;
  = typedef struct {
  = 	int re_magic;
  = 	size_t re_nsub;		// number of parenthesized subexpressions
@@ -36,66 +72,91 @@
  * In state representations, an operator's bit is on to signify a state
  * immediately *preceding* "execution" of that operator.
  */
-typedef long sop;		/* strip operator */
+typedef unsigned long sop;	/* strip operator */
 typedef long sopno;
-#define	OPRMASK	0x7c000000
-#define	OPDMASK	0x03ffffff
-#define	OPSHIFT	(26)
+#define	OPRMASK	0xf8000000L
+#define	OPDMASK	0x07ffffffL
+#define	OPSHIFT	((unsigned)27)
 #define	OP(n)	((n)&OPRMASK)
 #define	OPND(n)	((n)&OPDMASK)
 #define	SOP(op, opnd)	((op)|(opnd))
 /* operators			   meaning	operand			*/
 /*						(back, fwd are offsets)	*/
-#define	OEND	(1<<OPSHIFT)	/* endmarker	-			*/
-#define	OCHAR	(2<<OPSHIFT)	/* character	unsigned char		*/
-#define	OBOL	(3<<OPSHIFT)	/* left anchor	-			*/
-#define	OEOL	(4<<OPSHIFT)	/* right anchor	-			*/
-#define	OANY	(5<<OPSHIFT)	/* .		-			*/
-#define	OANYOF	(6<<OPSHIFT)	/* [...]	set number		*/
-#define	OBACK_	(7<<OPSHIFT)	/* begin \d	paren number		*/
-#define	O_BACK	(8<<OPSHIFT)	/* end \d	paren number		*/
-#define	OPLUS_	(9<<OPSHIFT)	/* + prefix	fwd to suffix		*/
-#define	O_PLUS	(10<<OPSHIFT)	/* + suffix	back to prefix		*/
-#define	OQUEST_	(11<<OPSHIFT)	/* ? prefix	fwd to suffix		*/
-#define	O_QUEST	(12<<OPSHIFT)	/* ? suffix	back to prefix		*/
-#define	OLPAREN	(13<<OPSHIFT)	/* (		fwd to )		*/
-#define	ORPAREN	(14<<OPSHIFT)	/* )		back to (		*/
-#define	OCH_	(15<<OPSHIFT)	/* begin choice	fwd to OOR2		*/
-#define	OOR1	(16<<OPSHIFT)	/* | pt. 1	back to OOR1 or OCH_	*/
-#define	OOR2	(17<<OPSHIFT)	/* | pt. 2	fwd to OOR2 or O_CH	*/
-#define	O_CH	(18<<OPSHIFT)	/* end choice	back to OOR1		*/
-#define	OBOW	(19<<OPSHIFT)	/* begin word	-			*/
-#define	OEOW	(20<<OPSHIFT)	/* end word	-			*/
+#define	OEND	(1L<<OPSHIFT)	/* endmarker	-			*/
+#define	OCHAR	(2L<<OPSHIFT)	/* character	wide character		*/
+#define	OBOL	(3L<<OPSHIFT)	/* left anchor	-			*/
+#define	OEOL	(4L<<OPSHIFT)	/* right anchor	-			*/
+#define	OANY	(5L<<OPSHIFT)	/* .		-			*/
+#define	OANYOF	(6L<<OPSHIFT)	/* [...]	set number		*/
+#define	OBACK_	(7L<<OPSHIFT)	/* begin \d	paren number		*/
+#define	O_BACK	(8L<<OPSHIFT)	/* end \d	paren number		*/
+#define	OPLUS_	(9L<<OPSHIFT)	/* + prefix	fwd to suffix		*/
+#define	O_PLUS	(10L<<OPSHIFT)	/* + suffix	back to prefix		*/
+#define	OQUEST_	(11L<<OPSHIFT)	/* ? prefix	fwd to suffix		*/
+#define	O_QUEST	(12L<<OPSHIFT)	/* ? suffix	back to prefix		*/
+#define	OLPAREN	(13L<<OPSHIFT)	/* (		fwd to )		*/
+#define	ORPAREN	(14L<<OPSHIFT)	/* )		back to (		*/
+#define	OCH_	(15L<<OPSHIFT)	/* begin choice	fwd to OOR2		*/
+#define	OOR1	(16L<<OPSHIFT)	/* | pt. 1	back to OOR1 or OCH_	*/
+#define	OOR2	(17L<<OPSHIFT)	/* | pt. 2	fwd to OOR2 or O_CH	*/
+#define	O_CH	(18L<<OPSHIFT)	/* end choice	back to OOR1		*/
+#define	OBOW	(19L<<OPSHIFT)	/* begin word	-			*/
+#define	OEOW	(20L<<OPSHIFT)	/* end word	-			*/
 
 /*
- * Structure for [] character-set representation.  Character sets are
- * done as bit vectors, grouped 8 to a byte vector for compactness.
- * The individual set therefore has both a pointer to the byte vector
- * and a mask to pick out the relevant bit of each byte.  A hash code
- * simplifies testing whether two sets could be identical.
- *
- * This will get trickier for multicharacter collating elements.  As
- * preliminary hooks for dealing with such things, we also carry along
- * a string of multi-character elements, and decide the size of the
- * vectors at run time.
+ * Structures for [] character-set representation.
  */
 typedef struct {
-	uch *ptr;		/* -> uch [csetsize] */
-	uch mask;		/* bit within array */
-	uch hash;		/* hash code */
-	size_t smultis;
-	char *multis;		/* -> char[smulti]  ab\0cd\0ef\0\0 */
+	wint_t		min;
+	wint_t		max;
+} crange;
+typedef struct {
+	unsigned char	bmp[NC / 8];
+	wctype_t	*types;
+	int		ntypes;
+	wint_t		*wides;
+	int		nwides;
+	crange		*ranges;
+	int		nranges;
+	int		invert;
+	int		icase;
 } cset;
-/* note that CHadd and CHsub are unsafe, and CHIN doesn't yield 0/1 */
-#define	CHadd(cs, c)	((cs)->ptr[(uch)(c)] |= (cs)->mask, (cs)->hash += (c))
-#define	CHsub(cs, c)	((cs)->ptr[(uch)(c)] &= ~(cs)->mask, (cs)->hash -= (c))
-#define	CHIN(cs, c)	((cs)->ptr[(uch)(c)] & (cs)->mask)
-#define	MCadd(p, cs, cp)	mcadd(p, cs, cp)	/* regcomp() internal fns */
-#define	MCsub(p, cs, cp)	mcsub(p, cs, cp)
-#define	MCin(p, cs, cp)	mcin(p, cs, cp)
 
-/* stuff for character categories */
-typedef unsigned char cat_t;
+static int
+CHIN1(cset *cs, wint_t ch)
+{
+	int i;
+
+	assert(ch >= 0);
+	if (ch < NC)
+		return (((cs->bmp[ch >> 3] & (1 << (ch & 7))) != 0) ^
+		    cs->invert);
+	for (i = 0; i < cs->nwides; i++)
+		if (ch == cs->wides[i])
+			return (!cs->invert);
+	for (i = 0; i < cs->nranges; i++)
+		if (cs->ranges[i].min <= ch && ch <= cs->ranges[i].max)
+			return (!cs->invert);
+	for (i = 0; i < cs->ntypes; i++)
+		if (iswctype(ch, cs->types[i]))
+			return (!cs->invert);
+	return (cs->invert);
+}
+
+static __inline int
+CHIN(cset *cs, wint_t ch)
+{
+
+	assert(ch >= 0);
+	if (ch < NC)
+		return (((cs->bmp[ch >> 3] & (1 << (ch & 7))) != 0) ^
+		    cs->invert);
+	else if (cs->icase)
+		return (CHIN1(cs, ch) || CHIN1(cs, towlower(ch)) ||
+		    CHIN1(cs, towupper(ch)));
+	else
+		return (CHIN1(cs, ch));
+}
 
 /*
  * main compiled-expression structure
@@ -104,10 +165,8 @@ struct re_guts {
 	int magic;
 #		define	MAGIC2	((('R'^0200)<<8)|'E')
 	sop *strip;		/* malloced area for strip */
-	int csetsize;		/* number of bits in a cset vector */
 	int ncsets;		/* number of csets in use */
 	cset *sets;		/* -> cset [ncsets] */
-	uch *setbits;		/* -> uch[csetsize][ncsets/CHAR_BIT] */
 	int cflags;		/* copy of regcomp() cflags argument */
 	sopno nstates;		/* = number of sops */
 	sopno firststate;	/* the initial OEND (normally 0) */
@@ -118,17 +177,16 @@ struct re_guts {
 #		define	BAD	04	/* something wrong */
 	int nbol;		/* number of ^ used */
 	int neol;		/* number of $ used */
-	int ncategories;	/* how many character categories */
-	cat_t *categories;	/* ->catspace[-CHAR_MIN] */
 	char *must;		/* match must contain this string */
+	int moffset;		/* latest point at which must may be located */
+	int *charjump;		/* Boyer-Moore char jump table */
+	int *matchjump;		/* Boyer-Moore match jump table */
 	int mlen;		/* length of must */
 	size_t nsub;		/* copy of re_nsub */
 	int backrefs;		/* does it use back references? */
 	sopno nplus;		/* how deep does it nest +s? */
-	/* catspace must be last */
-	cat_t catspace[1];	/* actually [NC] */
 };
 
 /* misc utilities */
-#define	OUT	(CHAR_MAX+1)	/* a non-character value */
-#define	ISWORD(c)	(isalnum((unsigned char)c) || (c) == '_')
+#define	OUT	(CHAR_MIN - 1)	/* a non-character value */
+#define ISWORD(c)       (iswalnum((uch)(c)) || (c) == '_')