Add a libcompat with strlcat() and strlcpy() from OpenBSD.

git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@113 d4fa192b-c00b-0410-8231-f00ffab90ce4

configure.ac

@@ -60,6 +60,10 @@ AC_FUNC_VPRINTF
 AC_CHECK_FUNCS([strerror])
 AC_FUNC_STRERROR_R
 AC_CHECK_FUNCS([socket])
+AC_CHECK_FUNCS([strlcat])
+AM_CONDITIONAL(HAVE_STRLCAT, test x$ac_strlcat = xtrue)
+AC_CHECK_FUNCS([strlcpy])
+AM_CONDITIONAL(HAVE_STRLCPY, test x$ac_strlcpy = xtrue)
 
 AC_CONFIG_FILES([
     Makefile
@@ -69,6 +73,7 @@ AC_CONFIG_FILES([
     contrib/Makefile
     include/Makefile
     lib/Makefile
+    lib/libcompat/Makefile
     lib/libsbuf/Makefile
     lib/libvarnish/Makefile
     lib/libvarnishapi/Makefile

include/Makefile.am

 # $Id$
 
 include_HEADERS = \
+	compat.h \
 	hash.h \
 	libvarnish.h \
 	queue.h \

include/compat.h

+/*
+ * $Id$
+ */
+
+#ifndef COMPAT_H_INCLUDED
+#define COMPAT_H_INCLUDED
+
+#ifndef HAVE_STRLCPY
+size_t strlcpy(char *dst, const char *src, size_t size);
+#endif
+
+#ifndef HAVE_STRLCAT
+size_t strlcat(char *dst, const char *src, size_t size);
+#endif
+
+#endif

lib/Makefile.am

 # $Id$
 
 SUBDIRS = \
+	libcompat \
 	libsbuf \
 	libvarnish \
 	libvarnishapi \

lib/libcompat/Makefile.am

+# $Id$
+
+INCLUDES = -I$(top_srcdir)/include
+
+lib_LIBRARIES = libcompat.a
+
+libcompat_a_SOURCES =
+
+if !HAVE_STRLCAT
+libcompat_a_SOURCES += strlcat.c
+endif
+
+if !HAVE_STRLCPY
+libcompat_a_SOURCES += strlcpy.c
+endif

lib/libcompat/strlcat.c

+/* $Id$ */
+/*	$OpenBSD: strlcat.c,v 1.13 2005/08/08 08:05:37 espie Exp $	*/
+
+/*
+ * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <sys/types.h>
+#include <string.h>
+
+#include "config.h"
+#include "compat.h"
+
+/*
+ * Appends src to string dst of size siz (unlike strncat, siz is the
+ * full size of dst, not space left).  At most siz-1 characters
+ * will be copied.  Always NUL terminates (unless siz <= strlen(dst)).
+ * Returns strlen(src) + MIN(siz, strlen(initial dst)).
+ * If retval >= siz, truncation occurred.
+ */
+size_t
+strlcat(char *dst, const char *src, size_t siz)
+{
+	char *d = dst;
+	const char *s = src;
+	size_t n = siz;
+	size_t dlen;
+
+	/* Find the end of dst and adjust bytes left but don't go past end */
+	while (n-- != 0 && *d != '\0')
+		d++;
+	dlen = d - dst;
+	n = siz - dlen;
+
+	if (n == 0)
+		return(dlen + strlen(s));
+	while (*s != '\0') {
+		if (n != 1) {
+			*d++ = *s;
+			n--;
+		}
+		s++;
+	}
+	*d = '\0';
+
+	return(dlen + (s - src));	/* count does not include NUL */
+}

lib/libcompat/strlcpy.c

+/* $Id$ */
+/*	$OpenBSD: strlcpy.c,v 1.10 2005/08/08 08:05:37 espie Exp $	*/
+
+/*
+ * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <sys/types.h>
+#include <string.h>
+
+#include "config.h"
+#include "compat.h"
+
+/*
+ * Copy src to string dst of size siz.  At most siz-1 characters
+ * will be copied.  Always NUL terminates (unless siz == 0).
+ * Returns strlen(src); if retval >= siz, truncation occurred.
+ */
+size_t
+strlcpy(char *dst, const char *src, size_t siz)
+{
+	char *d = dst;
+	const char *s = src;
+	size_t n = siz;
+
+	/* Copy as many bytes as will fit */
+	if (n != 0 && --n != 0) {
+		do {
+			if ((*d++ = *s++) == 0)
+				break;
+		} while (--n != 0);
+	}
+
+	/* Not enough room in dst, add NUL and traverse rest of src */
+	if (n == 0) {
+		if (siz != 0)
+			*d = '\0';		/* NUL-terminate dst */
+		while (*s++)
+			;
+	}
+
+	return(s - src - 1);	/* count does not include NUL */
+}