Snobol4 语言 实战 二进制文件差异比较实战

Snobol4amuwap 发布于 4 天前 2 次阅读

Snobol4【1】 语言实战：二进制文件差异比较【2】实战

Snobol4 是一种古老的编程语言，最初由 Stephen C. Johnson 在1962年设计，主要用于文本处理。尽管 Snobol4 在现代编程语言中并不常见，但它的一些概念和特性仍然具有一定的研究价值。本文将探讨如何使用 Snobol4 语言实现二进制文件差异比较的功能，这是一种在系统管理和软件开发中常见的任务。

Snobol4 简介

Snobol4 是 Snobol 系列语言的第四个版本，它具有以下特点：

- 文本处理能力：Snobol4 非常适合处理文本数据，包括模式匹配【3】、替换【4】和搜索【5】。
- 动态数据结构【6】：Snobol4 支持动态数据结构，如列表和表。
- 过程式编程【7】：Snobol4 支持过程式编程，允许使用循环和条件语句。

二进制文件差异比较的挑战

二进制文件差异比较是一个复杂的任务，因为二进制文件不包含人类可读的文本信息。以下是一些挑战：

- 字节级比较【8】：需要逐字节比较两个文件，以确定它们是否相同。
- 文件大小差异【9】：如果文件大小不同，则它们肯定不同。
- 内容差异【10】：即使文件大小相同，也需要检查每个字节是否相同。

Snobol4 实现二进制文件差异比较

以下是一个使用 Snobol4 实现二进制文件差异比较的示例代码。请注意，由于 Snobol4 的特性和限制，以下代码可能需要根据实际环境进行调整。

```snobol
:DIFF COMPARE
'FILE1' FILE1
'FILE2' FILE2
0 FILE1-POS
0 FILE2-POS
0 FILE1-LEN
0 FILE2-LEN
0 FILE1-READ
0 FILE2-READ

FILE1-POS FILE1-POS + 1
FILE2-POS FILE2-POS + 1

FILE1-LEN FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1-POS FILE1