1.stdint.h头文件
这段代码是GNU C库(glibc)中<stdint.h>
头文件的一部分,它定义了C99标准中的固定宽度整数类型及其相关的宏。这些类型和宏确保了在不同平台上编写的程序能够以一致的方式处理整数数据,而不必担心底层硬件的具体实现细节。以下是对这段代码的详细解析:
1. 版权声明
/* Copyright (C) 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
这段声明指出了该文件是GNU C库的一部分,并且遵循GNU较宽松公共许可证(LGPL)
1 这意味着你可以自由地分发、修改和使用这个文件,但必须遵守LGPL的条款。特别是,如果你对这个文件进行了修改并发布了修改后的版本,你必须提供修改的源代码,并确保用户能够重新链接他们的程序。
2. 头文件保护
#ifndef _STDINT_H
#define _STDINT_H 1
这是典型的头