1e74101e4STim J. Robbins /*- 287275e43STim J. Robbins * Copyright (c) 2002-2004 Tim J. Robbins. 3e74101e4STim J. Robbins * All rights reserved. 4e74101e4STim J. Robbins * 5*3c87aa1dSDavid Chisnall * Copyright (c) 2011 The FreeBSD Foundation 6*3c87aa1dSDavid Chisnall * All rights reserved. 7*3c87aa1dSDavid Chisnall * Portions of this software were developed by David Chisnall 8*3c87aa1dSDavid Chisnall * under sponsorship from the FreeBSD Foundation. 9*3c87aa1dSDavid Chisnall * 10e74101e4STim J. Robbins * Redistribution and use in source and binary forms, with or without 11e74101e4STim J. Robbins * modification, are permitted provided that the following conditions 12e74101e4STim J. Robbins * are met: 13e74101e4STim J. Robbins * 1. Redistributions of source code must retain the above copyright 14e74101e4STim J. Robbins * notice, this list of conditions and the following disclaimer. 15e74101e4STim J. Robbins * 2. Redistributions in binary form must reproduce the above copyright 16e74101e4STim J. Robbins * notice, this list of conditions and the following disclaimer in the 17e74101e4STim J. Robbins * documentation and/or other materials provided with the distribution. 18e74101e4STim J. Robbins * 19e74101e4STim J. Robbins * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 20e74101e4STim J. Robbins * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21e74101e4STim J. Robbins * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22e74101e4STim J. Robbins * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 23e74101e4STim J. Robbins * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24e74101e4STim J. Robbins * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25e74101e4STim J. Robbins * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26e74101e4STim J. Robbins * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27e74101e4STim J. Robbins * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28e74101e4STim J. Robbins * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29e74101e4STim J. Robbins * SUCH DAMAGE. 30e74101e4STim J. Robbins */ 31e74101e4STim J. Robbins 32e74101e4STim J. Robbins #include <sys/cdefs.h> 33e74101e4STim J. Robbins __FBSDID("$FreeBSD$"); 34e74101e4STim J. Robbins 35e74101e4STim J. Robbins #include "namespace.h" 36e74101e4STim J. Robbins #include <errno.h> 37e74101e4STim J. Robbins #include <stdio.h> 3824990dfaSTim J. Robbins #include <stdlib.h> 39e74101e4STim J. Robbins #include <wchar.h> 40e74101e4STim J. Robbins #include "un-namespace.h" 41e74101e4STim J. Robbins #include "libc_private.h" 42e74101e4STim J. Robbins #include "local.h" 43f9ceea9bSTim J. Robbins #include "mblocal.h" 44*3c87aa1dSDavid Chisnall #include "xlocale_private.h" 45e74101e4STim J. Robbins 468f030a44STim J. Robbins /* 478f030a44STim J. Robbins * MT-safe version. 488f030a44STim J. Robbins */ 498f030a44STim J. Robbins wint_t 50*3c87aa1dSDavid Chisnall fgetwc_l(FILE *fp, locale_t locale) 518f030a44STim J. Robbins { 528f030a44STim J. Robbins wint_t r; 53*3c87aa1dSDavid Chisnall FIX_LOCALE(locale); 548f030a44STim J. Robbins 558f030a44STim J. Robbins FLOCKFILE(fp); 568f030a44STim J. Robbins ORIENT(fp, 1); 57*3c87aa1dSDavid Chisnall r = __fgetwc(fp, locale); 588f030a44STim J. Robbins FUNLOCKFILE(fp); 598f030a44STim J. Robbins 608f030a44STim J. Robbins return (r); 618f030a44STim J. Robbins } 62*3c87aa1dSDavid Chisnall wint_t 63*3c87aa1dSDavid Chisnall fgetwc(FILE *fp) 64*3c87aa1dSDavid Chisnall { 65*3c87aa1dSDavid Chisnall return fgetwc_l(fp, __get_locale()); 66*3c87aa1dSDavid Chisnall } 678f030a44STim J. Robbins 68fcc51917STim J. Robbins /* 69fcc51917STim J. Robbins * Non-MT-safe version. 70fcc51917STim J. Robbins */ 71fcc51917STim J. Robbins wint_t 72*3c87aa1dSDavid Chisnall __fgetwc(FILE *fp, locale_t locale) 730b7bc802STim J. Robbins { 7424990dfaSTim J. Robbins wchar_t wc; 75d6ed810aSTim J. Robbins size_t nconv; 76*3c87aa1dSDavid Chisnall struct xlocale_ctype *l = XLOCALE_CTYPE(locale); 77e74101e4STim J. Robbins 78d6ed810aSTim J. Robbins if (fp->_r <= 0 && __srefill(fp)) 7924990dfaSTim J. Robbins return (WEOF); 80fcc51917STim J. Robbins if (MB_CUR_MAX == 1) { 81fcc51917STim J. Robbins /* Fast path for single-byte encodings. */ 82fcc51917STim J. Robbins wc = *fp->_p++; 83fcc51917STim J. Robbins fp->_r--; 84fcc51917STim J. Robbins return (wc); 85fcc51917STim J. Robbins } 86d6ed810aSTim J. Robbins do { 87*3c87aa1dSDavid Chisnall nconv = l->__mbrtowc(&wc, fp->_p, fp->_r, &fp->_mbstate); 88d6ed810aSTim J. Robbins if (nconv == (size_t)-1) 8924990dfaSTim J. Robbins break; 90d6ed810aSTim J. Robbins else if (nconv == (size_t)-2) 9187275e43STim J. Robbins continue; 92d6ed810aSTim J. Robbins else if (nconv == 0) { 93d6ed810aSTim J. Robbins /* 94d6ed810aSTim J. Robbins * Assume that the only valid representation of 95d6ed810aSTim J. Robbins * the null wide character is a single null byte. 96d6ed810aSTim J. Robbins */ 97d6ed810aSTim J. Robbins fp->_p++; 98d6ed810aSTim J. Robbins fp->_r--; 9987275e43STim J. Robbins return (L'\0'); 100d6ed810aSTim J. Robbins } else { 101d6ed810aSTim J. Robbins fp->_p += nconv; 102d6ed810aSTim J. Robbins fp->_r -= nconv; 10387275e43STim J. Robbins return (wc); 10424990dfaSTim J. Robbins } 105d6ed810aSTim J. Robbins } while (__srefill(fp) == 0); 1066180233fSTim J. Robbins fp->_flags |= __SERR; 10787275e43STim J. Robbins errno = EILSEQ; 10824990dfaSTim J. Robbins return (WEOF); 109e74101e4STim J. Robbins } 110