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Diffstat (limited to 'lib/libutils/isoc/newlib/strnlen.c')
-rw-r--r-- | lib/libutils/isoc/newlib/strnlen.c | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/lib/libutils/isoc/newlib/strnlen.c b/lib/libutils/isoc/newlib/strnlen.c new file mode 100644 index 0000000..4793b14 --- /dev/null +++ b/lib/libutils/isoc/newlib/strnlen.c @@ -0,0 +1,80 @@ +/* + * Copyright (c) 1994-2009 Red Hat, Inc. + * 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. Neither the name of the copyright holder nor the names of its + * contributors may be used to endorse or promote products derived from this + * software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT HOLDER OR CONTRIBUTORS 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. + */ + +/* +FUNCTION + <<strnlen>>---character string length + +INDEX + strnlen + +ANSI_SYNOPSIS + #include <string.h> + size_t strnlen(const char *<[str]>, size_t <[n]>); + +TRAD_SYNOPSIS + #include <string.h> + size_t strnlen(<[str]>, <[n]>) + char *<[src]>; + size_t <[n]>; + +DESCRIPTION + The <<strnlen>> function works out the length of the string + starting at <<*<[str]>>> by counting chararacters until it + reaches a NUL character or the maximum: <[n]> number of + characters have been inspected. + +RETURNS + <<strnlen>> returns the character count or <[n]>. + +PORTABILITY +<<strnlen>> is a GNU extension. + +<<strnlen>> requires no supporting OS subroutines. + +*/ + +#undef __STRICT_ANSI__ +#include "_ansi.h" +#include <string.h> + +size_t +_DEFUN (strnlen, (str, n), + _CONST char *str _AND + size_t n) +{ + _CONST char *start = str; + + while (n-- > 0 && *str) + str++; + + return str - start; +} |