| /* |
| 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); |
| } |
| |
| |
| |