Mercurial > gnulib
view lib/binary-io.h @ 40212:8da9577294da
unistr/*, uniconv/*: Fix undefined behaviour.
Reported by Jeffrey Walton <noloader@gmail.com>.
* lib/unistr/u-cpy.h (FUNC): Don't invoke memcpy with a zero size.
* lib/unistr/u-cpy-alloc.h (FUNC): Likewise.
* lib/uniconv/u8-conv-from-enc.c (u8_conv_from_encoding): Likewise.
* lib/uniconv/u8-conv-to-enc.c (u8_conv_to_encoding): Likewise.
author | Bruno Haible <bruno@clisp.org> |
---|---|
date | Sat, 09 Mar 2019 00:01:47 +0100 |
parents | b06060465f09 |
children |
line wrap: on
line source
/* Binary mode I/O. Copyright (C) 2001, 2003, 2005, 2008-2019 Free Software Foundation, Inc. This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <https://www.gnu.org/licenses/>. */ #ifndef _BINARY_H #define _BINARY_H /* For systems that distinguish between text and binary I/O. O_BINARY is guaranteed by the gnulib <fcntl.h>. */ #include <fcntl.h> /* The MSVC7 <stdio.h> doesn't like to be included after '#define fileno ...', so we include it here first. */ #include <stdio.h> #ifndef _GL_INLINE_HEADER_BEGIN #error "Please include config.h first." #endif _GL_INLINE_HEADER_BEGIN #ifndef BINARY_IO_INLINE # define BINARY_IO_INLINE _GL_INLINE #endif #if O_BINARY # if defined __EMX__ || defined __DJGPP__ || defined __CYGWIN__ # include <io.h> /* declares setmode() */ # define __gl_setmode setmode # else # define __gl_setmode _setmode # undef fileno # define fileno _fileno # endif #else /* On reasonable systems, binary I/O is the only choice. */ /* Use a function rather than a macro, to avoid gcc warnings "warning: statement with no effect". */ BINARY_IO_INLINE int __gl_setmode (int fd _GL_UNUSED, int mode _GL_UNUSED) { return O_BINARY; } #endif #if defined __DJGPP__ || defined __EMX__ extern int __gl_setmode_check (int); #else BINARY_IO_INLINE int __gl_setmode_check (int fd _GL_UNUSED) { return 0; } #endif /* Set FD's mode to MODE, which should be either O_TEXT or O_BINARY. Return the old mode if successful, -1 (setting errno) on failure. Ordinarily this function would be called 'setmode', since that is its name on MS-Windows, but it is called 'set_binary_mode' here to avoid colliding with a BSD function of another name. */ BINARY_IO_INLINE int set_binary_mode (int fd, int mode) { int r = __gl_setmode_check (fd); return r != 0 ? r : __gl_setmode (fd, mode); } /* This macro is obsolescent. */ #define SET_BINARY(fd) ((void) set_binary_mode (fd, O_BINARY)) _GL_INLINE_HEADER_END #endif /* _BINARY_H */