c - 如何在 C 代码中从结构的 stream_data 中解压缩位？

Question

例如

typedef struct 
{
  bool streamValid;
  dword dateTime;
  dword timeStamp;
  stream_data[800];
} RadioDataA;

例。其中 stream_data[800] 包含:

**Variable**  **Length (in bits)**
packetID        8
packetL         8
versionMajor    4
versionMinor    4
radioID         8

等..

我需要写:

void unpackData(radioDataA *streamData, MA_DataA *maData)
{
  //unpack streamData (from above) & put some of the data into maData
  //How do I read in bits of data? I know it's by groups of 8 but I don't understand how.
  //MAData is also a struct.
}

Answer 1

我不确定我是否理解正确，但你为什么不能这样做:

memcpy(maData, streamData->stream_data, sizeof(MA_DataA));

这会将字节数组中包含的数据完全复制到结构中。