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[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.18.0/] [newlib/] [libc/] [string/] [wcsnlen.c] - Rev 307
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/* FUNCTION <<wcsnlen>>---get fixed-size wide-character string length INDEX wcsnlen ANSI_SYNOPSIS #include <wchar.h> size_t wcsnlen(const wchar_t *<[s]>, size_t <[maxlen]>); TRAD_SYNOPSIS #include <wchar.h> size_t wcsnlen(<[s]>, <[maxlen]>) wchar_t *<[s]>; size_t <[maxlen]>; DESCRIPTION The <<wcsnlen>> function computes the number of wide-character codes in the wide-character string pointed to by <[s]> not including the terminating L'\0' wide character but at most <[maxlen]> wide characters. RETURNS <<wcsnlen>> returns the length of <[s]> if it is less then <[maxlen]>, or <[maxlen]> if there is no L'\0' wide character in first <[maxlen]> characters. PORTABILITY <<wcsnlen>> is a GNU extension. <<wcsnlen>> requires no supporting OS subroutines. */ /* * Copyright (c) 2003, Artem B. Bityuckiy (dedekind@mail.ru). * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the above copyright notice, * this condition statement, and the following disclaimer are retained * in any redistributions of the source code. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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. */ #include <_ansi.h> #include <sys/types.h> #include <wchar.h> size_t _DEFUN(wcsnlen, (s, maxlen), _CONST wchar_t *s _AND size_t maxlen) { _CONST wchar_t *p; p = s; while (*p && maxlen-- > 0) p++; return (size_t)(p - s); }
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