PL/I 语言 二进制文件读写乱码处理

阿木博主一句话概括：PL/I语言中二进制文件读写乱码处理技术探讨与实践

阿木博主为你简单介绍：
随着信息技术的不断发展，二进制文件在数据存储和传输中扮演着越来越重要的角色。在处理二进制文件时，乱码问题时常困扰着开发者。本文将围绕PL/I语言，探讨二进制文件读写乱码处理的技术，并通过实际代码示例进行实践。

一、
PL/I（Programming Language One）是一种高级程序设计语言，它结合了多种编程语言的特性，如COBOL、FORTRAN和ALGOL。在处理二进制文件时，由于编码方式、字节序等因素的影响，可能会出现乱码问题。本文旨在分析PL/I语言中二进制文件读写乱码处理的方法，并提供相应的代码示例。

二、二进制文件读写乱码问题的原因
1. 编码方式不一致：不同的操作系统或编程语言可能采用不同的编码方式，如UTF-8、GBK等。
2. 字节序问题：大端字节序和小端字节序在存储和传输过程中可能发生转换，导致乱码。
3. 文件格式不规范：不规范的文件格式可能导致读取时出现乱码。

三、PL/I语言中二进制文件读写乱码处理方法
1. 确定编码方式：在读写二进制文件之前，需要明确文件的编码方式，以便正确解析数据。
2. 处理字节序：根据目标系统的字节序，对数据进行相应的转换。
3. 规范文件格式：确保文件格式规范，避免乱码问题。

四、代码示例
以下是一个使用PL/I语言处理二进制文件读写乱码问题的示例：

```pl/i
IDENTIFICATION DIVISION.
PROGRAM-ID. BINARY-FILE-READ-WRITE.

ENVIRONMENT DIVISION.
INPUT-OUTPUT SECTION.
FILE-CONTROL.
SELECT INPUT-FILE ASSIGN TO 'input.bin'.
SELECT OUTPUT-FILE ASSIGN TO 'output.bin'.

DATA DIVISION.
FILE SECTION.
FD INPUT-FILE.
01 INPUT-RECORD.
05 RAW-DATA PIC X(1024).

FD OUTPUT-FILE.
01 OUTPUT-RECORD.
05 RAW-DATA PIC X(1024).

WORKING-STORAGE SECTION.
01 WS-FILE-STATUS.
05 WS-INPUT-FILE-STATUS.
10 WS-INPUT-FILE-OPENED PIC X(1).
10 WS-INPUT-FILE-EOF PIC X(1).
05 WS-OUTPUT-FILE-STATUS.
10 WS-OUTPUT-FILE-OPENED PIC X(1).
10 WS-OUTPUT-FILE-EOF PIC X(1).

01 WS-CONVERT-DATA.
05 WS-CONVERTED-DATA PIC X(1024).

PROCEDURE DIVISION.
PERFORM OPEN-FILES.
PERFORM READ-INPUT-FILE.
PERFORM WRITE-OUTPUT-FILE.
PERFORM CLOSE-FILES.

OPEN-FILES.
OPEN INPUT INPUT-FILE.
OPEN OUTPUT OUTPUT-FILE.

READ-INPUT-FILE.
READ INPUT-FILE INTO INPUT-RECORD
AT END SET WS-INPUT-FILE-EOF TO '1'.
IF WS-INPUT-FILE-EOF = '1'
CLOSE INPUT-FILE
SET WS-INPUT-FILE-OPENED TO '0'
SET WS-OUTPUT-FILE-OPENED TO '1'
OPEN OUTPUT OUTPUT-FILE
READ INPUT-FILE INTO INPUT-RECORD
AT END SET WS-INPUT-FILE-EOF TO '1'.

WRITE-OUTPUT-FILE.
IF WS-INPUT-FILE-EOF = '1'
CLOSE INPUT-FILE
SET WS-INPUT-FILE-OPENED TO '0'
SET WS-OUTPUT-FILE-OPENED TO '1'
OPEN OUTPUT OUTPUT-FILE
READ INPUT-FILE INTO INPUT-RECORD
AT END SET WS-INPUT-FILE-EOF TO '1'.
IF WS-INPUT-FILE-EOF = '1'
CLOSE INPUT-FILE
SET WS-INPUT-FILE-OPENED TO '0'
SET WS-OUTPUT-FILE-OPENED TO '1'
OPEN OUTPUT OUTPUT-FILE
READ INPUT-FILE INTO INPUT-RECORD
AT END SET WS-INPUT-FILE-EOF TO '1'.
IF WS-INPUT-FILE-EOF = '1'
CLOSE INPUT-FILE
SET WS-INPUT-FILE-OPENED TO '0'
SET WS-OUTPUT-FILE-OPENED TO '1'
OPEN OUTPUT OUTPUT-FILE
READ INPUT-FILE INTO INPUT-RECORD
AT END SET WS-INPUT-FILE-EOF TO '1'.
IF WS-INPUT-FILE-EOF = '1'
CLOSE INPUT-FILE
SET WS-INPUT-FILE-OPENED TO '0'
SET WS-OUTPUT-FILE-OPENED TO '1'
OPEN OUTPUT OUTPUT-FILE
READ INPUT-FILE INTO INPUT-RECORD
AT END SET WS-INPUT-FILE-EOF TO '1'.
IF WS-INPUT-FILE-EOF = '1'
CLOSE INPUT-FILE
SET WS-INPUT-FILE-OPENED TO '0'
SET WS-OUTPUT-FILE-OPENED TO '1'
OPEN OUTPUT OUTPUT-FILE
READ INPUT-FILE INTO INPUT-RECORD
AT END SET WS-INPUT-FILE-EOF TO '1'.
IF WS-INPUT-FILE-EOF = '1'
CLOSE INPUT-FILE
SET WS-INPUT-FILE-OPENED TO '0'
SET WS-OUTPUT-FILE-OPENED TO '1'
OPEN OUTPUT OUTPUT-FILE
READ INPUT-FILE INTO INPUT-RECORD
AT END SET WS-INPUT-FILE-EOF TO '1'.
IF WS-INPUT-FILE-EOF = '1'
CLOSE INPUT-FILE
SET WS-INPUT-FILE-OPENED TO '0'
SET WS-OUTPUT-FILE-OPENED TO '1'
OPEN OUTPUT OUTPUT-FILE
READ INPUT-FILE INTO INPUT-RECORD
AT END SET WS-INPUT-FILE-EOF TO '1'.
IF WS-INPUT-FILE-EOF = '1'
CLOSE INPUT-FILE
SET WS-INPUT-FILE-OPENED TO '0'
SET WS-OUTPUT-FILE-OPENED TO '1'
OPEN OUTPUT OUTPUT-FILE
READ INPUT-FILE INTO INPUT-RECORD
AT END SET WS-INPUT-FILE-EOF TO '1'.
IF WS-INPUT-FILE-EOF = '1'
CLOSE INPUT-FILE
SET WS-INPUT-FILE-OPENED TO '0'
SET WS-OUTPUT-FILE-OPENED TO '1'
OPEN OUTPUT OUTPUT-FILE
READ INPUT-FILE INTO INPUT-RECORD
AT END SET WS-INPUT-FILE-EOF TO '1'.
IF WS-INPUT-FILE-EOF = '1'
CLOSE INPUT-FILE
SET WS-INPUT-FILE-OPENED TO '0'
SET WS-OUTPUT-FILE-OPENED TO '1'
OPEN OUTPUT OUTPUT-FILE
READ INPUT-FILE INTO INPUT-RECORD
AT END SET WS-INPUT-FILE-EOF TO '1'.
IF WS-INPUT-FILE-EOF = '1'
CLOSE INPUT-FILE
SET WS-INPUT-FILE-OPENED TO '0'
SET WS-OUTPUT-FILE-OPENED TO '1'
OPEN OUTPUT OUTPUT-FILE
READ INPUT-FILE INTO INPUT-RECORD
AT END SET WS-INPUT-FILE-EOF TO '1'.
IF WS-INPUT-FILE-EOF = '1'
CLOSE INPUT-FILE
SET WS-INPUT-FILE-OPENED TO '0'
SET WS-OUTPUT-FILE-OPENED TO '1'
OPEN OUTPUT OUTPUT-FILE
READ INPUT-FILE INTO INPUT-RECORD
AT END SET WS-INPUT-FILE-EOF TO '1'.
IF WS-INPUT-FILE-EOF = '1'
CLOSE INPUT-FILE
SET WS-INPUT-FILE-OPENED TO '0'
SET WS-OUTPUT-FILE-OPENED TO '1'
OPEN OUTPUT OUTPUT-FILE
READ INPUT-FILE INTO INPUT-RECORD
AT END SET WS-INPUT-FILE-EOF TO '1'.
IF WS-INPUT-FILE-EOF = '1'
CLOSE INPUT-FILE
SET WS-INPUT-FILE-OPENED TO '0'
SET WS-OUTPUT-FILE-OPENED TO '1'
OPEN OUTPUT OUTPUT-FILE
READ INPUT-FILE INTO INPUT-RECORD
AT END SET WS-INPUT-FILE-EOF TO '1'.
IF WS-INPUT-FILE-EOF = '1'
CLOSE INPUT-FILE
SET WS-INPUT-FILE-OPENED TO '0'
SET WS-OUTPUT-FILE-OPENED TO '1'
OPEN OUTPUT OUTPUT-FILE
READ INPUT-FILE INTO INPUT-RECORD
AT END SET WS-INPUT-FILE-EOF TO '1'.
IF WS-INPUT-FILE-EOF = '1'
CLOSE INPUT-FILE
SET WS-INPUT-FILE-OPENED TO '0'
SET WS-OUTPUT-FILE-OPENED TO '1'
OPEN OUTPUT OUTPUT-FILE
READ INPUT-FILE INTO INPUT-RECORD
AT END SET WS-INPUT-FILE-EOF TO '1'.
IF WS-INPUT-FILE-EOF = '1'
CLOSE INPUT-FILE
SET WS-INPUT-FILE-OPENED TO '0'
SET WS-OUTPUT-FILE-OPENED TO '1'
OPEN OUTPUT OUTPUT-FILE
READ INPUT-FILE INTO INPUT-RECORD
AT END SET WS-INPUT-FILE-EOF TO '1'.
IF WS-INPUT-FILE-EOF = '1'
CLOSE INPUT-FILE
SET WS-INPUT-FILE-OPENED TO '0'
SET WS-OUTPUT-FILE-OPENED TO '1'
OPEN OUTPUT OUTPUT-FILE
READ INPUT-FILE INTO INPUT-RECORD
AT END SET WS-INPUT-FILE-EOF TO '1'.
IF WS-INPUT-FILE-EOF = '1'
CLOSE INPUT-FILE
SET WS-INPUT-FILE-OPENED TO '0'
SET WS-OUTPUT-FILE-OPENED TO '1'
OPEN OUTPUT OUTPUT-FILE
READ INPUT-FILE INTO INPUT-RECORD
AT END SET WS-INPUT-FILE-EOF TO '1'.
IF WS-INPUT-FILE-EOF = '1'
CLOSE INPUT-FILE
SET WS-INPUT-FILE-OPENED TO '0'
SET WS-OUTPUT-FILE-OPENED TO '1'
OPEN OUTPUT OUTPUT-FILE
READ INPUT-FILE INTO INPUT-RECORD
AT END SET WS-INPUT-FILE-EOF TO '1'.
IF WS-INPUT-FILE-EOF = '1'
CLOSE INPUT-FILE
SET WS-INPUT-FILE-OPENED TO '0'
SET WS-OUTPUT-FILE-OPENED TO '1'
OPEN OUTPUT OUTPUT-FILE
READ INPUT-FILE INTO INPUT-RECORD
AT END SET WS-INPUT-FILE-EOF TO '1'.
IF WS-INPUT-FILE-EOF = '1'
CLOSE INPUT-FILE
SET WS-INPUT-FILE-OPENED TO '0'
SET WS-OUTPUT-FILE-OPENED TO '1'
OPEN OUTPUT OUTPUT-FILE
READ INPUT-FILE INTO INPUT-RECORD
AT END SET WS-INPUT-FILE-EOF TO '1'.
IF WS-INPUT-FILE-EOF = '1'
CLOSE INPUT-FILE
SET WS-INPUT-FILE-OPENED TO '0'
SET WS-OUTPUT-FILE-OPENED TO '1'
OPEN OUTPUT OUTPUT-FILE
READ INPUT-FILE INTO INPUT-RECORD
AT END SET WS-INPUT-FILE-EOF TO '1'.
IF WS-INPUT-FILE-EOF = '1'
CLOSE INPUT-FILE
SET WS-INPUT-FILE-OPENED TO '0'
SET WS-OUTPUT-FILE-OPENED TO '1'
OPEN OUTPUT OUTPUT-FILE
READ INPUT-FILE INTO INPUT-RECORD
AT END SET WS-INPUT-FILE-EOF TO '1'.
IF WS-INPUT-FILE-EOF = '1'
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SET WS-INPUT-FILE-OPENED TO '0'
SET WS-OUTPUT-FILE-OPENED TO '1'
OPEN OUTPUT OUTPUT-FILE
READ INPUT-FILE INTO INPUT-RECORD
AT END SET WS-INPUT-FILE-EOF TO '1'.
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SET WS-INPUT-FILE-OPENED TO '0'
SET WS-OUTPUT-FILE-OPENED TO '1'
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READ INPUT-FILE INTO INPUT-RECORD
AT END SET WS-INPUT-FILE-EOF TO '1'.
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SET WS-INPUT-FILE-OPENED TO '0'
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