C#结构到字节数组的编组方式与Delphi中打包记录的编组方式相同
我有一个用Delphi 2007编写的遗留应用程序,它生成如下字节数组:C#结构到字节数组的编组方式与Delphi中打包记录的编组方式相同,c#,arrays,delphi,struct,marshalling,C#,Arrays,Delphi,Struct,Marshalling,我有一个用Delphi 2007编写的遗留应用程序,它生成如下字节数组: command_data = packed record direction : word; name : array [0..9] of char; end; command_header = packed record length : word; data1 : word; data2 : cardinal; end
command_data = packed record
direction : word;
name : array [0..9] of char;
end;
command_header = packed record
length : word;
data1 : word;
data2 : cardinal;
end;
command_data_container = packed record
data : command_data;
containerId : word;
end;
function Generate(name: string)boolean;
var
header : command_header;
container : command_data_container;
charArrayName: array [0..9] of char;
begin
charArrayName = array [0..9] of char;
for I := 0 to Length(name) - 1 do begin
charArrayName[i] := name[i+1];
end;
charArrayName[i+1] := #0;
header.length := sizeof(header) + sizeof(container);
header.data1 := 0;
header.data2 := 1;
container.data.direction := 1;
container.data.name := charArrayName;
container.containerId := 1;
stream := TMemoryStream.Create;
stream.WriteBuffer(header, SizeOf(header));
stream.WriteBuffer(container, SizeOf(container));
//...
end;
我需要用C#重写这部分。到目前为止,我已经做到了:
[StructLayout(LayoutKind.Sequential, Pack = 1)]
unsafe struct command_data
{
public ushort direction;
public fixed char name[10];
}
[StructLayout(LayoutKind.Sequential, Pack = 1)]
unsafe struct command_header
{
public ushort length;
public ushort data1;
public ulong data2;
}
[StructLayout(LayoutKind.Sequential, Pack = 1)]
struct command_data_container
{
public command_data data;
public ushort containerId;
}
public bool Generate(string name)
{
name = name + Char.MinValue; // Add null terminator.
char[] charArrayName = agentId.ToCharArray();
unsafe
{
command_header header;
command_data_container command;
header.data1 = 0;
header.data2 = 1;
header.length = (ushort)(sizeof(command_header) + sizeof(command_data_container));
command.data.direction = 1;
*command.data.name = charArrayName[0];
for (int i = 1; i < charArrayName.Length; i++)
{
*(command.data.name + i) = charArrayName[i];
}
command.containerId = 1;
var headerBytes = StructToBytes<command_header>(header);
var commandBytes = StructToBytes<command_data_container>(command);
byte[] combined = new byte[headerBytes.Length + commandBytes.Length];
Buffer.BlockCopy(headerBytes, 0, combined, 0, headerBytes.Length);
Buffer.BlockCopy(commandBytes, 0, combined, headerBytes.Length, commandBytes.Length);
//combined should have the same data as the stream in the delphi code
}
}
public static byte[] StructToBytes<T>(T structure) where T : struct
{
int size = Marshal.SizeOf(structure);
byte[] rawData = new byte[size];
GCHandle handle = GCHandle.Alloc(rawData, GCHandleType.Pinned);
try
{
IntPtr rawDataPtr = handle.AddrOfPinnedObject();
Marshal.StructureToPtr(structure, rawDataPtr, false);
}
finally
{
handle.Free();
}
return rawData;
}
[StructLayout(LayoutKind.Sequential,Pack=1)]
不安全的结构命令\u数据
{
公共卫生服务方向;
公共固定字符名[10];
}
[StructLayout(LayoutKind.Sequential,Pack=1)]
不安全的结构命令\u头
{
公共长度;
公共卫生数据1;
公共乌龙数据2;
}
[StructLayout(LayoutKind.Sequential,Pack=1)]
结构命令\u数据\u容器
{
公共命令数据;
公共集装箱运输;
}
公共布尔生成(字符串名称)
{
name=name+Char.MinValue;//添加空终止符。
char[]charArrayName=agentId.ToCharArray();
不安全的
{
命令头;
命令\数据\容器命令;
header.data1=0;
header.data2=1;
header.length=(ushort)(sizeof(命令头)+sizeof(命令数据容器));
command.data.direction=1;
*command.data.name=charArrayName[0];
for(int i=1;i
我尝试了几种方法将结构转换为字节数组,但没有一种方法能再现与Delphi代码相同的结果
StructToBytes方法借用自此:
我还尝试了其他一些编组方法,但没有任何效果。
我做了什么错事?< /P>你知道Delphi 2007 char是ANSICAR,C中是Unicode?Car中的char是两个字节,而C++中是一个字节。因此在c#中使用:新字节[10]。阵列也必须以“\0”(0x00)终止。我通常使用:Encoding.UTF8.GetBytes(“JohnSmith\0”);如果必须用C#重写,那么为什么要关心互操作和编组?只需生成相同数量的字节。不难。我同意这里的@Rudy。直接写入字节流更简单。显然,这里的大问题是已经确定的围绕char的大小问题。我还想指出的是,您的Delphi代码已经具备了缓冲区溢出的条件。@jdweng
编码。这里的默认值与Delphi代码相匹配。我没有看到任何证据表明输入字符串是UTF-8编码的。ANSI是Delphi2007的标准。这里有一些解释会很好
[StructLayout(LayoutKind.Sequential, Pack = 1, CharSet = CharSet.Ansi)]
struct command_data
{
public ushort direction;
[MarshalAs( UnmanagedType.ByValTStr, SizeConst = 10)]
public string name;
}