6437624 RFE: Add ksh93 (as /usr/bin/ksh93) and libshell.so to OS/Net

6505835 AST tools and library (libpp) required for creating l10n messages for ksh93
PSARC/2006/550 Korn Shell 93 Integration
PSARC/2006/587 /etc/ksh.kshrc for ksh93
PSARC/2007/035 ksh93 Amendments
Contributed by Roland Mainz <roland.mainz@nrubsig.org>

--HG--
rename : usr/src/lib/libcmd/common/mapfile-vers => deleted_files/usr/src/lib/libcmd/common/mapfile-vers
rename : usr/src/lib/libcmd/common/placeholder.c => deleted_files/usr/src/lib/libcmd/common/placeholder.c

1 files changed, 174 insertions, 0 deletions

diff --git a/usr/src/lib/libast/common/regex/regcache.c b/usr/src/lib/libast/common/regex/regcache.c
new file mode 100644
index 0000000000..ff9554e904
--- /dev/null
+++ b/usr/src/lib/libast/common/regex/regcache.c
@@ -0,0 +1,174 @@
+/***********************************************************************
+*                                                                      *
+*               This software is part of the ast package               *
+*           Copyright (c) 1985-2007 AT&T Knowledge Ventures            *
+*                      and is licensed under the                       *
+*                  Common Public License, Version 1.0                  *
+*                      by AT&T Knowledge Ventures                      *
+*                                                                      *
+*                A copy of the License is available at                 *
+*            http://www.opensource.org/licenses/cpl1.0.txt             *
+*         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
+*                                                                      *
+*              Information and Software Systems Research               *
+*                            AT&T Research                             *
+*                           Florham Park NJ                            *
+*                                                                      *
+*                 Glenn Fowler <gsf@research.att.com>                  *
+*                  David Korn <dgk@research.att.com>                   *
+*                   Phong Vo <kpv@research.att.com>                    *
+*                                                                      *
+***********************************************************************/
+#pragma prototyped
+
+/*
+ * regcomp() regex_t cache
+ * AT&T Research
+ */
+
+#include <ast.h>
+#include <regex.h>
+
+#define CACHE		8		/* # cached re's		*/
+#define MAXPAT		256		/* max pattern length + 1	*/
+
+#define KEEP		01
+#define DROP		02
+
+typedef struct Cache_s
+{
+	regex_t		re;
+	unsigned long	serial;
+	regflags_t	reflags;
+	int		flags;
+	char		pattern[MAXPAT];
+} Cache_t;
+
+static struct State_s
+{
+	Cache_t*	cache[CACHE];
+	unsigned long	serial;
+	char*		locale;
+} matchstate;
+
+/*
+ * flush the cache
+ */
+
+static void
+flushcache(void)
+{
+	register int		i;
+
+	for (i = 0; i < elementsof(matchstate.cache); i++)
+		if (matchstate.cache[i] && matchstate.cache[i]->flags)
+		{
+			matchstate.cache[i]->flags = 0;
+			regfree(&matchstate.cache[i]->re);
+		}
+}
+
+/*
+ * return regcomp() compiled re for pattern and reflags
+ */
+
+regex_t*
+regcache(const char* pattern, regflags_t reflags, int* status)
+{
+	register Cache_t*	cp;
+	register int		i;
+	char*			s;
+	int			empty;
+	int			unused;
+	int			old;
+
+	/*
+	 * 0 pattern flushes the cache
+	 */
+
+	if (!pattern)
+	{
+		flushcache();
+		if (status)
+			*status = 0;
+		return 0;
+	}
+
+	/*
+	 * flush the cache if the locale changed
+	 * the ast setlocale() intercept maintains
+	 * persistent setlocale() return values
+	 */
+
+	if ((s = setlocale(LC_CTYPE, NiL)) != matchstate.locale)
+	{
+		matchstate.locale = s;
+		flushcache();
+	}
+
+	/*
+	 * check if the pattern is in the cache
+	 */
+
+	empty = unused = -1;
+	old = 0;
+	for (i = 0; i < elementsof(matchstate.cache); i++)
+		if (!matchstate.cache[i])
+			empty = i;
+		else if (!(matchstate.cache[i]->flags & KEEP))
+		{
+			if (matchstate.cache[i]->flags)
+			{
+				matchstate.cache[i]->flags = 0;
+				regfree(&matchstate.cache[i]->re);
+			}
+			unused = i;
+		}
+		else if (streq(matchstate.cache[i]->pattern, pattern) && matchstate.cache[i]->reflags == reflags)
+			break;
+		else if (!matchstate.cache[old] || matchstate.cache[old]->serial > matchstate.cache[i]->serial)
+			old = i;
+	if (i >= elementsof(matchstate.cache))
+	{
+		if (unused < 0)
+		{
+			if (empty < 0)
+				unused = old;
+			else
+				unused = empty;
+		}
+		if (!(cp = matchstate.cache[unused]) && !(cp = matchstate.cache[unused] = newof(0, Cache_t, 1, 0)))
+		{
+			if (status)
+				*status = REG_ESPACE;
+			return 0;
+		}
+		if (cp->flags)
+		{
+			cp->flags = 0;
+			regfree(&cp->re);
+		}
+		cp->reflags = reflags;
+		if (strlen(pattern) < sizeof(cp->pattern))
+		{
+			strcpy(cp->pattern, pattern);
+			pattern = (const char*)cp->pattern;
+			cp->flags = KEEP;
+		}
+		else
+			cp->flags = DROP;
+		if (i = regcomp(&cp->re, pattern, cp->reflags))
+		{
+			if (status)
+				*status = i;
+			cp->flags = 0;
+			return 0;
+		}
+	}
+	else
+		cp = matchstate.cache[i];
+	cp->serial = ++matchstate.serial;
+	if (status)
+		*status = 0;
+	return &cp->re;
+}