diff options
Diffstat (limited to 'libc/wchar/wcslcat.c')
| -rw-r--r-- | libc/wchar/wcslcat.c | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/libc/wchar/wcslcat.c b/libc/wchar/wcslcat.c new file mode 100644 index 0000000..f5f1e1e --- /dev/null +++ b/libc/wchar/wcslcat.c @@ -0,0 +1,74 @@ +/* + * 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$"); + +#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(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 */ +} |