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Diffstat (limited to 'newlib/libc/string/wcslcpy.c')
| -rw-r--r-- | newlib/libc/string/wcslcpy.c | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/newlib/libc/string/wcslcpy.c b/newlib/libc/string/wcslcpy.c new file mode 100644 index 000000000..ac7d01863 --- /dev/null +++ b/newlib/libc/string/wcslcpy.c @@ -0,0 +1,102 @@ +/* +FUNCTION + <<wcslcpy>>---copy a wide-character string to specified length + +ANSI_SYNOPSIS + #include <wchar.h> + size_t wcslcpy(wchar_t *<[dst]>, const wchar_t *<[src]>, size_t <[siz]>); + +TRAD_SYNOPSIS + #include <wchar.h> + size_t wcslcpy(<[dst]>, <[src]>, <[siz]>) + wchar_t *<[dst]>; + const wchar_t *<[src]>; + size_t <[siz]>; + +DESCRIPTION + <<wcslcpy>> copies wide-characters from <[src]> to <[dst]> + such that up to <[siz]> - 1 characters are copied. A + terminating null is appended to the result, unless <[siz]> + is zero. + +RETURNS + <<wcslcpy>> returns the number of wide-characters in <[src]>, + not including the terminating null wide-character. If the + return value is greater than or equal to <[siz]>, then + not all wide-characters were copied from <[src]> and truncation + occurred. + +PORTABILITY +No supporting OS subroutines are required. +*/ + +/* $NetBSD: wcslcpy.c,v 1.1 2000/12/23 23:14:36 itojun Exp $ */ +/* from OpenBSD: strlcpy.c,v 1.4 1999/05/01 18:56:41 millert Exp */ + +/* + * 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. + */ + +#include <_ansi.h> +#include <wchar.h> + +/* + * Copy src to string dst of size siz. At most siz-1 characters + * will be copied. Always NUL terminates (unless siz == 0). + * Returns wcslen(src); if retval >= siz, truncation occurred. + */ +size_t +_DEFUN (wcslcpy, (dst, src, siz), + wchar_t * dst _AND + _CONST wchar_t * src _AND + size_t siz) +{ + wchar_t *d = dst; + _CONST wchar_t *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 */ +} |