Objective-C转C#代码疑问：固件数据块截取逻辑是否正确？

原Objective-C代码逻辑 #

原代码核心是根据不同条件截取固件数据块，逻辑如下：

NSData *blockData;

if(valid)
{
    if(sendingLast) 
    {
         blockData = rawFirmwareData;
    }
    else 
    {
        int startingPos = (currSensor.firmwareBlockIterator * 
                (ourCurrentSensor.firmwareBlockSize - headerSize));
        blockData = [rawFirmwareData subdataWithRange:NSMakeRange(startingPos, 
                    rawFirmwareData.length - startingPos)];
    }
}
else 
{
    blockData = [rawFirmwareData 
                subdataWithRange:NSMakeRange((currSensor.firmwareBlockIterator * 
               (currSensor.firmwareBlockSize - headerSize)), 
               (currSensor.firmwareBlockSize - headerSize))];   
}

拆解关键逻辑：

• 当valid为true时：
  • 若sendingLast为true，直接复用完整的rawFirmwareData
  • 若sendingLast为false，截取从startingPos到数据末尾的所有剩余内容（长度为rawFirmwareData.length - startingPos）
• 当valid为false时，固定截取长度为currSensor.firmwareBlockSize - headerSize的数据块

你的C#代码的问题 #

你在valid为true且sendingLast为false的分支里，错误地将数组长度设置为currSensor.firmwareBlockSize - headerSize，这和原Objective-C逻辑不符——原逻辑这里是取剩余全部数据，而非固定大小的块。其他分支（valid为false、valid为true且sendingLast为true）的数组处理是符合原逻辑的。

修正后的C#代码 #

byte[] blockData;

if (valid)
{
    if (sendingLast)
    {
        blockData = rawFirmwareData;
    }
    else
    {
        int blockSizeMinusHeader = currSensor.firmwareBlockSize - headerSize;
        int startingPos = currSensor.firmwareBlockIterator * blockSizeMinusHeader;
        // 计算剩余数据长度，而非固定块大小
        int remainingLength = rawFirmwareData.Length - startingPos;
        blockData = new byte[remainingLength];
        Array.Copy(rawFirmwareData, startingPos, blockData, 0, remainingLength);
    }
}
else
{
    int blockSizeMinusHeader = currSensor.firmwareBlockSize - headerSize;
    int startingPos = currSensor.firmwareBlockIterator * blockSizeMinusHeader;
    blockData = new byte[blockSizeMinusHeader];
    Array.Copy(rawFirmwareData, startingPos, blockData, 0, blockSizeMinusHeader);
}

内容的提问来源于stack exchange，提问作者appym243