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" 38f9ceea9bSTim J. Robbins #include "mblocal.h" 39e74101e4STim J. Robbins 408f030a44STim J. Robbins /* 418f030a44STim J. Robbins * MT-safe version. 428f030a44STim J. Robbins */ 438f030a44STim J. Robbins wint_t 448f030a44STim J. Robbins fgetwc(FILE *fp) 458f030a44STim J. Robbins { 468f030a44STim J. Robbins wint_t r; 478f030a44STim J. Robbins 488f030a44STim J. Robbins FLOCKFILE(fp); 498f030a44STim J. Robbins ORIENT(fp, 1); 508f030a44STim J. Robbins r = __fgetwc(fp); 518f030a44STim J. Robbins FUNLOCKFILE(fp); 528f030a44STim J. Robbins 538f030a44STim J. Robbins return (r); 548f030a44STim J. Robbins } 558f030a44STim J. Robbins 56fcc51917STim J. Robbins /* 57fcc51917STim J. Robbins * Non-MT-safe version. 58fcc51917STim J. Robbins */ 59fcc51917STim J. Robbins wint_t 60fcc51917STim J. Robbins __fgetwc(FILE *fp) 610b7bc802STim J. Robbins { 6224990dfaSTim J. Robbins wchar_t wc; 63d6ed810aSTim J. Robbins size_t nconv; 64e74101e4STim J. Robbins 65d6ed810aSTim J. Robbins if (fp->_r <= 0 && __srefill(fp)) 6624990dfaSTim J. Robbins return (WEOF); 67fcc51917STim J. Robbins if (MB_CUR_MAX == 1) { 68fcc51917STim J. Robbins /* Fast path for single-byte encodings. */ 69fcc51917STim J. Robbins wc = *fp->_p++; 70fcc51917STim J. Robbins fp->_r--; 71fcc51917STim J. Robbins return (wc); 72fcc51917STim J. Robbins } 73d6ed810aSTim J. Robbins do { 74f9ceea9bSTim J. Robbins nconv = __mbrtowc(&wc, fp->_p, fp->_r, &fp->_extra->mbstate); 75d6ed810aSTim J. Robbins if (nconv == (size_t)-1) 7624990dfaSTim J. Robbins break; 77d6ed810aSTim J. Robbins else if (nconv == (size_t)-2) 7887275e43STim J. Robbins continue; 79d6ed810aSTim J. Robbins else if (nconv == 0) { 80d6ed810aSTim J. Robbins /* 81d6ed810aSTim J. Robbins * Assume that the only valid representation of 82d6ed810aSTim J. Robbins * the null wide character is a single null byte. 83d6ed810aSTim J. Robbins */ 84d6ed810aSTim J. Robbins fp->_p++; 85d6ed810aSTim J. Robbins fp->_r--; 8687275e43STim J. Robbins return (L'\0'); 87d6ed810aSTim J. Robbins } else { 88d6ed810aSTim J. Robbins fp->_p += nconv; 89d6ed810aSTim J. Robbins fp->_r -= nconv; 9087275e43STim J. Robbins return (wc); 9124990dfaSTim J. Robbins } 92d6ed810aSTim J. Robbins } while (__srefill(fp) == 0); 936180233fSTim J. Robbins fp->_flags |= __SERR; 9487275e43STim J. Robbins errno = EILSEQ; 9524990dfaSTim J. Robbins return (WEOF); 96e74101e4STim J. Robbins } 97