83 lines
1.6 KiB
C
83 lines
1.6 KiB
C
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//
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// Created by ricardo on 22-12-11.
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//
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#ifndef ZIP_UNZIP_SEARCH_FILE_IO_H
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#define ZIP_UNZIP_SEARCH_FILE_IO_H
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#include "string"
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/**
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* 文件元信息
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*/
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struct MetaData
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{
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/**
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* 哈夫曼树节点数组长度
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*/
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int HuffmanNodeLength;
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/**
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* 哈夫曼树根节点长度
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*/
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int HuffmanRoot;
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/**
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* 文件中最后一个缓冲区被使用的位数
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*/
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int LastBufferUsedLength;
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};
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class FileIO
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{
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public:
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/**
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* 统计文件的字符的出现频率
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* @param fileName 文件名称
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* @return 字符频率数组 需要delete
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*/
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static int* ReadCharFrequency(const std::string& fileName);
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/**
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* 写入压缩文件
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* @param inputFile 被压缩文件名称
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* @param outputFile 输出压缩文件名称
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*/
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static void WriteZipFile(const std::string& inputFile, const std::string& outputFile);
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/**
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* 写入解压缩文件
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* @param inputFile 压缩文件名称
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* @param outputFile 解压文件名称
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*/
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static void WriteUnzipFile(const std::string& inputFile, const std::string& outputFile);
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/**
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* 计算文件的压缩率
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* @param inputFileName
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* @param outputFileName
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* @return
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*/
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static double CalculateZipRate(const std::string& inputFileName, const std::string& outputFileName);
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};
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class BinaryBuffer
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{
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public:
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explicit BinaryBuffer(std::string& inputFileName);
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~BinaryBuffer();
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char read();
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int position = 0;
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private:
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FILE* file = nullptr;
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int buffer;
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int bufferPos;
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bool readFinishedFlag;
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};
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#endif //ZIP_UNZIP_SEARCH_FILE_IO_H
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