1e74101e4STim J. Robbins /*- 2e74101e4STim J. Robbins * Copyright (c) 2002 Tim J. Robbins. 3e74101e4STim J. Robbins * All rights reserved. 4e74101e4STim J. Robbins * 5e74101e4STim J. Robbins * Redistribution and use in source and binary forms, with or without 6e74101e4STim J. Robbins * modification, are permitted provided that the following conditions 7e74101e4STim J. Robbins * are met: 8e74101e4STim J. Robbins * 1. Redistributions of source code must retain the above copyright 9e74101e4STim J. Robbins * notice, this list of conditions and the following disclaimer. 10e74101e4STim J. Robbins * 2. Redistributions in binary form must reproduce the above copyright 11e74101e4STim J. Robbins * notice, this list of conditions and the following disclaimer in the 12e74101e4STim J. Robbins * documentation and/or other materials provided with the distribution. 13e74101e4STim J. Robbins * 14e74101e4STim J. Robbins * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15e74101e4STim J. Robbins * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16e74101e4STim J. Robbins * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17e74101e4STim J. Robbins * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18e74101e4STim J. Robbins * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19e74101e4STim J. Robbins * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20e74101e4STim J. Robbins * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21e74101e4STim J. Robbins * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22e74101e4STim J. Robbins * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23e74101e4STim J. Robbins * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24e74101e4STim J. Robbins * SUCH DAMAGE. 25e74101e4STim J. Robbins */ 26e74101e4STim J. Robbins 27e74101e4STim J. Robbins #include <sys/cdefs.h> 28e74101e4STim J. Robbins __FBSDID("$FreeBSD$"); 29e74101e4STim J. Robbins 30e74101e4STim J. Robbins #include "namespace.h" 31e74101e4STim J. Robbins #include <errno.h> 32e74101e4STim J. Robbins #include <stdio.h> 3324990dfaSTim J. Robbins #include <stdlib.h> 34e74101e4STim J. Robbins #include <wchar.h> 35e74101e4STim J. Robbins #include "un-namespace.h" 36e74101e4STim J. Robbins #include "libc_private.h" 37e74101e4STim J. Robbins #include "local.h" 38e74101e4STim J. Robbins 390b7bc802STim J. Robbins static __inline wint_t __fgetwc_nbf(FILE *); 400b7bc802STim J. Robbins 418f030a44STim J. Robbins /* 428f030a44STim J. Robbins * Non-MT-safe version. 438f030a44STim J. Robbins */ 44e74101e4STim J. Robbins wint_t 458f030a44STim J. Robbins __fgetwc(FILE *fp) 46e74101e4STim J. Robbins { 470b7bc802STim J. Robbins wint_t wc; 480b7bc802STim J. Robbins 490b7bc802STim J. Robbins if (MB_CUR_MAX == 1) { 500b7bc802STim J. Robbins /* 510b7bc802STim J. Robbins * Assume we're using a single-byte locale. A safer test 520b7bc802STim J. Robbins * might be to check _CurrentRuneLocale->encoding. 530b7bc802STim J. Robbins */ 540b7bc802STim J. Robbins wc = (wint_t)__sgetc(fp); 550b7bc802STim J. Robbins } else 560b7bc802STim J. Robbins wc = __fgetwc_nbf(fp); 570b7bc802STim J. Robbins 580b7bc802STim J. Robbins return (wc); 590b7bc802STim J. Robbins } 600b7bc802STim J. Robbins 618f030a44STim J. Robbins /* 628f030a44STim J. Robbins * MT-safe version. 638f030a44STim J. Robbins */ 648f030a44STim J. Robbins wint_t 658f030a44STim J. Robbins fgetwc(FILE *fp) 668f030a44STim J. Robbins { 678f030a44STim J. Robbins wint_t r; 688f030a44STim J. Robbins 698f030a44STim J. Robbins FLOCKFILE(fp); 708f030a44STim J. Robbins ORIENT(fp, 1); 718f030a44STim J. Robbins r = __fgetwc(fp); 728f030a44STim J. Robbins FUNLOCKFILE(fp); 738f030a44STim J. Robbins 748f030a44STim J. Robbins return (r); 758f030a44STim J. Robbins } 768f030a44STim J. Robbins 770b7bc802STim J. Robbins static __inline wint_t 780b7bc802STim J. Robbins __fgetwc_nbf(FILE *fp) 790b7bc802STim J. Robbins { 8024990dfaSTim J. Robbins char buf[MB_LEN_MAX]; 8124990dfaSTim J. Robbins mbstate_t mbs; 8224990dfaSTim J. Robbins size_t n, nconv; 8324990dfaSTim J. Robbins int c; 8424990dfaSTim J. Robbins wchar_t wc; 85e74101e4STim J. Robbins 8624990dfaSTim J. Robbins n = 0; 8724990dfaSTim J. Robbins while (n < MB_CUR_MAX) { 880b7bc802STim J. Robbins if ((c = __sgetc(fp)) == EOF) { 8924990dfaSTim J. Robbins if (n == 0) 9024990dfaSTim J. Robbins return (WEOF); 9124990dfaSTim J. Robbins break; 9224990dfaSTim J. Robbins } 9324990dfaSTim J. Robbins buf[n++] = (char)c; 9424990dfaSTim J. Robbins memset(&mbs, 0, sizeof(mbs)); 9524990dfaSTim J. Robbins nconv = mbrtowc(&wc, buf, n, &mbs); 9624990dfaSTim J. Robbins if (nconv == n) 97e74101e4STim J. Robbins return (wc); 9824990dfaSTim J. Robbins else if (nconv == 0) 9924990dfaSTim J. Robbins return (L'\0'); 100bddc6280STim J. Robbins else if (nconv == (size_t)-1) 10124990dfaSTim J. Robbins break; 10224990dfaSTim J. Robbins } 10324990dfaSTim J. Robbins 10424990dfaSTim J. Robbins while (n-- != 0) 1058f030a44STim J. Robbins __ungetc((unsigned char)buf[n], fp); 10624990dfaSTim J. Robbins errno = EILSEQ; 10724990dfaSTim J. Robbins return (WEOF); 108e74101e4STim J. Robbins } 109