| private serial_getports ( RJCP.IO.Ports.Native.Unix.SafeSerialHandle handle ) : IntPtr | ||
| handle | RJCP.IO.Ports.Native.Unix.SafeSerialHandle | |
| 리턴 | IntPtr | |
public PortDescription[] serial_getports(SafeSerialHandle handle)
{
// The portdesc is an array of two string pointers, where the last element is zero
IntPtr portdesc;
#if !NETSTANDARD2_0
portdesc = UnsafeNativeMethods.serial_getports(handle);
#else
try
{
portdesc = UnsafeNativeMethods.serial_getports(handle);
} catch (Exception ex) {
// Ugly hack as .NET Standard doesn't have EntryPointNotFoundException, so if we
// get any exception, we raise this one instead. To remove if it ever becomes
// available.
throw new EntryPointNotFoundException(ex.Message, ex);
}
#endif
errno = Marshal.GetLastWin32Error();
if (portdesc.Equals(IntPtr.Zero))
{
return(null);
}
// Get the number of ports in the system.
int portNum = 0;
IntPtr portName;
do
{
portName = Marshal.ReadIntPtr(portdesc, portNum * 2 * IntPtr.Size);
if (portName != IntPtr.Zero)
{
portNum++;
}
} while (portName != IntPtr.Zero);
// Copy them into our struct
PortDescription[] ports = new PortDescription[portNum];
for (int i = 0; i < portNum; i++)
{
IntPtr portPtr = Marshal.ReadIntPtr(portdesc, i * 2 * IntPtr.Size);
string port = Marshal.PtrToStringAnsi(portPtr);
IntPtr descPtr = Marshal.ReadIntPtr(portdesc, i * 2 * IntPtr.Size + IntPtr.Size);
string desc;
if (descPtr.Equals(IntPtr.Zero))
{
desc = string.Empty;
}
else
{
desc = Marshal.PtrToStringAnsi(descPtr);
}
ports[i] = new PortDescription(port, desc);
}
return(ports);
}
public PortDescription[] serial_getports(IntPtr handle)
{
// The portdesc is an array of two string pointers, where the last element is zero
IntPtr portdesc = UnsafeNativeMethods.serial_getports(handle);
errno = Marshal.GetLastWin32Error();
if (portdesc.Equals(IntPtr.Zero))
{
return(null);
}
// Get the number of ports in the system.
int portNum = 0;
IntPtr portName;
do
{
portName = Marshal.ReadIntPtr(portdesc, portNum * 2 * IntPtr.Size);
if (portName != IntPtr.Zero)
{
portNum++;
}
} while (portName != IntPtr.Zero);
// Copy them into our struct
PortDescription[] ports = new PortDescription[portNum];
for (int i = 0; i < portNum; i++)
{
IntPtr portPtr = Marshal.ReadIntPtr(portdesc, i * 2 * IntPtr.Size);
string port = Marshal.PtrToStringAnsi(portPtr);
IntPtr descPtr = Marshal.ReadIntPtr(portdesc, i * 2 * IntPtr.Size + IntPtr.Size);
string desc;
if (descPtr.Equals(IntPtr.Zero))
{
desc = string.Empty;
}
else
{
desc = Marshal.PtrToStringAnsi(descPtr);
}
ports[i] = new PortDescription(port, desc);
}
return(ports);
}