c# - zlib从C++到C#(如何将byte []转换为流，并将流转换为byte [])

我的任务是使用zlib解压缩数据包(接收到的数据包)，然后使用算法从数据中制作图片

好消息是我已经用C++编写了代码，但是任务是用C#编写代码

C++

        //Read the first values of the packet received

        DWORD image[200 * 64] = {0}; //used for algoritm(width always = 200 and height always == 64)
        int imgIndex = 0; //used for algoritm
        unsigned char rawbytes_[131072] = {0}; //read below
        unsigned char * rawbytes = rawbytes_; //destrination parameter for decompression(ptr)
        compressed = r.Read<WORD>(); //the length of the compressed bytes(picture)
        uncompressed = r.Read<WORD>(); //the length that should be after decompression
        width = r.Read<WORD>(); //the width of the picture
        height = r.Read<WORD>(); //the height of the picture

        LPBYTE ptr = r.GetCurrentStream(); //the bytes(file that must be decompressed)

        outLen = uncompressed; //copy the len into another variable

        //Decompress

        if(uncompress((Bytef*)rawbytes, &outLen, ptr, compressed) != Z_OK)
        {
            printf("Could not uncompress the image code.\n");
            Disconnect();
            return;
        }

        //Algoritm to make up the picture
        // Loop through the data
        for(int c = 0; c < (int)height; ++c)
        {
            for(int r = 0; r < (int)width; ++r)
            {
                imgIndex = (height - 1 - c) * width + r;
                image[imgIndex] = 0xFF000000;
                if(-((1 << (0xFF & (r & 0x80000007))) & rawbytes[((c * width + r) >> 3)]))
                    image[imgIndex] = 0xFFFFFFFF;
            }
        }

我正在尝试使用zlib.NET进行此操作，但是所有演示都具有要解压缩的代码(C#)

    private void decompressFile(string inFile, string outFile)
    {
        System.IO.FileStream outFileStream = new System.IO.FileStream(outFile, System.IO.FileMode.Create);
        zlib.ZOutputStream outZStream = new zlib.ZOutputStream(outFileStream);
        System.IO.FileStream inFileStream = new System.IO.FileStream(inFile, System.IO.FileMode.Open);
        try
        {
            CopyStream(inFileStream, outZStream);
        }
        finally
        {
            outZStream.Close();
            outFileStream.Close();
            inFileStream.Close();
        }
    }

    public static void CopyStream(System.IO.Stream input, System.IO.Stream output)
    {
        byte[] buffer = new byte[2000];
        int len;
        while ((len = input.Read(buffer, 0, 2000)) > 0)
        {
            output.Write(buffer, 0, len);
        }
        output.Flush();
    }

我的问题:我不想在解压缩后保存文件，因为我必须使用C++代码中显示的算法。

如何将byte []数组转换为与C#zlib代码中的流相似的流以解压缩数据，然后如何将流转换回字节数组？

另外，如何将zlib.NET代码更改为不保存文件？

最佳答案

只需使用MemoryStreams而不是FileStreams:

// Assuming inputData is a byte[]
MemoryStream input = new MemoryStream(inputData);
MemoryStream output = new MemoryStream();

然后，您可以随后使用output.ToArray()取出字节数组。

请注意，通常最好使用using语句而不是单个try/finally块-否则，如果第一次调用Close失败，则将不会进行其余操作。您可以像这样嵌套它们:

using (MemoryStream output = new MemoryStream())
using (Stream outZStream = new zlib.ZOutputStream(output))
using (Stream input = new MemoryStream(bytes))
{
    CopyStream(inFileStream, outZStream);
    return output.ToArray();
}

关于c# - zlib从C++到C#(如何将byte []转换为流，并将流转换为byte [])，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/737258/