17438fc3aSTim J. Robbins /*- 274f90defSTim J. Robbins * Copyright (c) 2002-2004 Tim J. Robbins. 3b85aa4e3STim J. Robbins * All rights reserved. 47438fc3aSTim J. Robbins * 57438fc3aSTim J. Robbins * Redistribution and use in source and binary forms, with or without 67438fc3aSTim J. Robbins * modification, are permitted provided that the following conditions 77438fc3aSTim J. Robbins * are met: 87438fc3aSTim J. Robbins * 1. Redistributions of source code must retain the above copyright 97438fc3aSTim J. Robbins * notice, this list of conditions and the following disclaimer. 107438fc3aSTim J. Robbins * 2. Redistributions in binary form must reproduce the above copyright 117438fc3aSTim J. Robbins * notice, this list of conditions and the following disclaimer in the 127438fc3aSTim J. Robbins * documentation and/or other materials provided with the distribution. 137438fc3aSTim J. Robbins * 14b85aa4e3STim J. Robbins * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 157438fc3aSTim J. Robbins * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 167438fc3aSTim J. Robbins * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17b85aa4e3STim J. Robbins * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 187438fc3aSTim J. Robbins * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 197438fc3aSTim J. Robbins * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 207438fc3aSTim J. Robbins * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 217438fc3aSTim J. Robbins * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 227438fc3aSTim J. Robbins * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 237438fc3aSTim J. Robbins * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 247438fc3aSTim J. Robbins * SUCH DAMAGE. 257438fc3aSTim J. Robbins */ 267438fc3aSTim J. Robbins 277438fc3aSTim J. Robbins #include <sys/cdefs.h> 287438fc3aSTim J. Robbins __FBSDID("$FreeBSD$"); 297438fc3aSTim J. Robbins 3074f90defSTim J. Robbins #include <errno.h> 3174f90defSTim J. Robbins #include <limits.h> 32b6f33850STim J. Robbins #include <stdlib.h> 3374f90defSTim J. Robbins #include <wchar.h> 347438fc3aSTim J. Robbins 357438fc3aSTim J. Robbins int 36b6f33850STim J. Robbins mblen(const char *s, size_t n) 377438fc3aSTim J. Robbins { 3874f90defSTim J. Robbins static const mbstate_t initial; 3974f90defSTim J. Robbins static mbstate_t mbs; 4074f90defSTim J. Robbins size_t rval; 417438fc3aSTim J. Robbins 4274f90defSTim J. Robbins if (s == NULL) { 4374f90defSTim J. Robbins /* No support for state dependent encodings. */ 4474f90defSTim J. Robbins mbs = initial; 4574f90defSTim J. Robbins return (0); 4674f90defSTim J. Robbins } 4774f90defSTim J. Robbins rval = mbrtowc(NULL, s, n, &mbs); 4874f90defSTim J. Robbins if (rval == (size_t)-1 || rval == (size_t)-2) 4974f90defSTim J. Robbins return (-1); 5074f90defSTim J. Robbins if (rval > INT_MAX) { 5174f90defSTim J. Robbins errno = ERANGE; 5274f90defSTim J. Robbins return (-1); 5374f90defSTim J. Robbins } 5474f90defSTim J. Robbins return ((int)rval); 557438fc3aSTim J. Robbins } 56