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How to Efficiently Convert a C/C Data Structure from a Byte Array to a C# Struct?
How to Efficiently Convert a C/C Data Structure from a Byte Array to a C# Struct?
Jan 19, 2025 am 07:36 AM
Read C/C data structure from byte array to C#
This article describes how to fill byte array data derived from C/C structures into C# structures.
Using GCHandle and Marshal
This method is divided into three steps:
- Use
GCHandle.Allocto fix the location of the byte array in memory. - Use
Marshal.PtrToStructureto convert a fixed memory address to aNewStuffinstance. - Once the conversion is complete, use
handle.Free()to releaseGCHandle.
Simplified code:
NewStuff ByteArrayToNewStuff(byte[] bytes)
{
GCHandle handle = GCHandle.Alloc(bytes, GCHandleType.Pinned);
NewStuff stuff;
try
{
stuff = (NewStuff)Marshal.PtrToStructure(handle.AddrOfPinnedObject(), typeof(NewStuff));
}
finally
{
handle.Free();
}
return stuff;
}
Generic version:
T ByteArrayToStructure<T>(byte[] bytes) where T : struct
{
T stuff;
GCHandle handle = GCHandle.Alloc(bytes, GCHandleType.Pinned);
try
{
stuff = (T)Marshal.PtrToStructure(handle.AddrOfPinnedObject(), typeof(T));
}
finally
{
handle.Free();
}
return stuff;
}
More simplified version (requires unsafe code block):
unsafe T ByteArrayToStructure<T>(byte[] bytes) where T : struct
{
fixed (byte* ptr = &bytes[0])
{
return (T)Marshal.PtrToStructure((IntPtr)ptr, typeof(T));
}
}
BinaryReader method
Using BinaryReader may not be more performant than the Marshal method. Both methods require the data to be correctly laid out and sized to be successfully converted into a NewStuff structure.
The above is the detailed content of How to Efficiently Convert a C/C Data Structure from a Byte Array to a C# Struct?. For more information, please follow other related articles on the PHP Chinese website!
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