1e74101e4STim J. Robbins /*- 287275e43STim J. Robbins * Copyright (c) 2002-2004 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 398f030a44STim J. Robbins /* 408f030a44STim J. Robbins * MT-safe version. 418f030a44STim J. Robbins */ 428f030a44STim J. Robbins wint_t 438f030a44STim J. Robbins fgetwc(FILE *fp) 448f030a44STim J. Robbins { 458f030a44STim J. Robbins wint_t r; 468f030a44STim J. Robbins 478f030a44STim J. Robbins FLOCKFILE(fp); 488f030a44STim J. Robbins ORIENT(fp, 1); 498f030a44STim J. Robbins r = __fgetwc(fp); 508f030a44STim J. Robbins FUNLOCKFILE(fp); 518f030a44STim J. Robbins 528f030a44STim J. Robbins return (r); 538f030a44STim J. Robbins } 548f030a44STim J. Robbins 55fcc51917STim J. Robbins /* 56fcc51917STim J. Robbins * Non-MT-safe version. 57fcc51917STim J. Robbins */ 58fcc51917STim J. Robbins wint_t 59fcc51917STim J. Robbins __fgetwc(FILE *fp) 600b7bc802STim J. Robbins { 6124990dfaSTim J. Robbins wchar_t wc; 62d6ed810aSTim J. Robbins size_t nconv; 63e74101e4STim J. Robbins 64d6ed810aSTim J. Robbins if (fp->_r <= 0 && __srefill(fp)) 6524990dfaSTim J. Robbins return (WEOF); 66fcc51917STim J. Robbins if (MB_CUR_MAX == 1) { 67fcc51917STim J. Robbins /* Fast path for single-byte encodings. */ 68fcc51917STim J. Robbins wc = *fp->_p++; 69fcc51917STim J. Robbins fp->_r--; 70fcc51917STim J. Robbins return (wc); 71fcc51917STim J. Robbins } 72d6ed810aSTim J. Robbins do { 73d6ed810aSTim J. Robbins nconv = mbrtowc(&wc, fp->_p, fp->_r, &fp->_extra->mbstate); 74d6ed810aSTim J. Robbins if (nconv == (size_t)-1) 7524990dfaSTim J. Robbins break; 76d6ed810aSTim J. Robbins else if (nconv == (size_t)-2) 7787275e43STim J. Robbins continue; 78d6ed810aSTim J. Robbins else if (nconv == 0) { 79d6ed810aSTim J. Robbins /* 80d6ed810aSTim J. Robbins * Assume that the only valid representation of 81d6ed810aSTim J. Robbins * the null wide character is a single null byte. 82d6ed810aSTim J. Robbins */ 83d6ed810aSTim J. Robbins fp->_p++; 84d6ed810aSTim J. Robbins fp->_r--; 8587275e43STim J. Robbins return (L'\0'); 86d6ed810aSTim J. Robbins } else { 87d6ed810aSTim J. Robbins fp->_p += nconv; 88d6ed810aSTim J. Robbins fp->_r -= nconv; 8987275e43STim J. Robbins return (wc); 9024990dfaSTim J. Robbins } 91d6ed810aSTim J. Robbins } while (__srefill(fp) == 0); 926180233fSTim J. Robbins fp->_flags |= __SERR; 9387275e43STim J. Robbins errno = EILSEQ; 9424990dfaSTim J. Robbins return (WEOF); 95e74101e4STim J. Robbins } 96