V2EX big-endian

Big-endian

Definition / 释义

(计算机)大端序:一种字节序(byte order)表示方式,在多字节数据(如 16/32/64 位整数)中,最高有效字节(MSB)存放在最低内存地址。常用于网络协议中(也称 network byte order)。另有相对概念 little-endian(小端序)。

Pronunciation / 发音

/b ndin/

Examples / 例句

Many network protocols use big-endian byte order.
许多网络协议使用大端序的字节顺序。

When parsing a binary file, you must know whether the 32-bit integers are stored in big-endian format; otherwise, the values will be interpreted incorrectly across different systems.
解析二进制文件时,你必须知道 32 位整数是否以大端序存储;否则在不同系统上数值会被错误解读。

Etymology / 词源

endian 一词源自乔纳森斯威夫特(Jonathan Swift)的讽刺小说《格列佛游记》(Gulliver’s Travels)中关于“从大头还是小头打鸡蛋”的争论(Big-Endians vs Little-Endians)。计算机科学家借用这一对立来命名两种相反的字节序:big-endian(大端)little-endian(小端)。

Related Words / 相关词

Literary Works / 文学与著作例证

  • Gulliver’s Travels(《格列佛游记》) “Big-Endians / Little-Endians”的讽刺设定是术语来源
  • IETF RFC 1700: Assigned Numbers 提及 big-endian 与网络字节序相关概念
  • IETF RFC 791: Internet Protocol 将多字节字段按网络字节序(传统上为大端序)进行规定与描述
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