1 /* Binary mode I/O. 2 Copyright (C) 2001, 2003, 2005, 2008-2020 Free Software Foundation, Inc. 3 4 This program is free software: you can redistribute it and/or modify 5 it under the terms of the GNU General Public License as published by 6 the Free Software Foundation; either version 3 of the License, or 7 (at your option) any later version. 8 9 This program is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 GNU General Public License for more details. 13 14 You should have received a copy of the GNU General Public License 15 along with this program. If not, see <https://www.gnu.org/licenses/>. */ 16 17 #ifndef _BINARY_H 18 #define _BINARY_H 19 20 /* For systems that distinguish between text and binary I/O. 21 O_BINARY is guaranteed by the gnulib <fcntl.h>. */ 22 #include <fcntl.h> 23 24 /* The MSVC7 <stdio.h> doesn't like to be included after '#define fileno ...', 25 so we include it here first. */ 26 #include <stdio.h> 27 28 #ifndef _GL_INLINE_HEADER_BEGIN 29 #error "Please include config.h first." 30 #endif 31 _GL_INLINE_HEADER_BEGIN 32 #ifndef BINARY_IO_INLINE 33 # define BINARY_IO_INLINE _GL_INLINE 34 #endif 35 36 #if O_BINARY 37 # if defined __EMX__ || defined __DJGPP__ || defined __CYGWIN__ 38 # include <io.h> /* declares setmode() */ 39 # define __gl_setmode setmode 40 # else 41 # define __gl_setmode _setmode 42 # undef fileno 43 # define fileno _fileno 44 # endif 45 #else 46 /* On reasonable systems, binary I/O is the only choice. */ 47 /* Use a function rather than a macro, to avoid gcc warnings 48 "warning: statement with no effect". */ 49 BINARY_IO_INLINE int 50 __gl_setmode (int fd _GL_UNUSED, int mode _GL_UNUSED) 51 { 52 return O_BINARY; 53 } 54 #endif 55 56 /* Set FD's mode to MODE, which should be either O_TEXT or O_BINARY. 57 Return the old mode if successful, -1 (setting errno) on failure. 58 Ordinarily this function would be called 'setmode', since that is 59 its name on MS-Windows, but it is called 'set_binary_mode' here 60 to avoid colliding with a BSD function of another name. */ 61 62 #if defined __DJGPP__ || defined __EMX__ 63 extern int set_binary_mode (int fd, int mode); 64 #else 65 BINARY_IO_INLINE int 66 set_binary_mode (int fd, int mode) 67 { 68 return __gl_setmode (fd, mode); 69 } 70 #endif 71 72 /* This macro is obsolescent. */ 73 #define SET_BINARY(fd) ((void) set_binary_mode (fd, O_BINARY)) 74 75 _GL_INLINE_HEADER_END 76 77 #endif /* _BINARY_H */ 78