Libc-320.tar.gz

[apple/libc.git] / string / FreeBSD / wcslcat.c

diff --git a/string/FreeBSD/wcslcat.c b/string/FreeBSD/wcslcat.c
new file mode 100644 (file)
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+++ b/string/FreeBSD/wcslcat.c
@@ -0,0 +1,77 @@
+/*
+ * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
+ * All rights reserved.
+ *
+ * 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. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED ``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 AUTHOR 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.
+ *
+ *     from OpenBSD: strlcat.c,v 1.3 2000/11/24 11:10:02 itojun Exp
+ */
+
+#include <sys/cdefs.h>
+#if 0
+#if defined(LIBC_SCCS) && !defined(lint)
+__RCSID("$NetBSD: wcslcat.c,v 1.1 2000/12/23 23:14:36 itojun Exp $");
+#endif /* LIBC_SCCS and not lint */
+#endif
+__FBSDID("$FreeBSD: src/lib/libc/string/wcslcat.c,v 1.6 2002/09/21 00:29:23 tjr Exp $");
+
+#include <sys/types.h>
+#include <wchar.h>
+
+/*
+ * Appends src to string dst of size siz (unlike wcsncat, siz is the
+ * full size of dst, not space left).  At most siz-1 characters
+ * will be copied.  Always NUL terminates (unless siz == 0).
+ * Returns wcslen(initial dst) + wcslen(src); if retval >= siz,
+ * truncation occurred.
+ */
+size_t
+wcslcat(dst, src, siz)
+       wchar_t *dst;
+       const wchar_t *src;
+       size_t siz;
+{
+       wchar_t *d = dst;
+       const wchar_t *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 (*d != '\0' && n-- != 0)
+               d++;
+       dlen = d - dst;
+       n = siz - dlen;
+
+       if (n == 0)
+               return(dlen + wcslen(s));
+       while (*s != '\0') {
+               if (n != 1) {
+                       *d++ = *s;
+                       n--;
+               }
+               s++;
+       }
+       *d = '\0';
+
+       return(dlen + (s - src));       /* count does not include NUL */
+}