private static int GetPeriBase()
{
var fp = Stdlib.fopen(DeviceTreePath, DeviceTreeAccessMode);
if (fp == IntPtr.Zero)
{
return(0);
}
var buf = new byte[4];
// get peri base from device tree
Stdlib.fseek(fp, 4, SeekFlags.SEEK_SET);
var periBase = 0;
if (Stdlib.fread(buf, 1, (ulong)buf.Length, fp) == (ulong)buf.Length)
{
periBase = buf[0] << 24 | buf[1] << 16 | buf[2] << 8 | buf[3] << 0;
}
Stdlib.fclose(fp);
return(periBase);
}
public PosixFileHandler(string path, string mode)
{
FileHandle = Stdlib.fopen(path, mode);
if (FileHandle == IntPtr.Zero)
{
Errno err = Stdlib.GetLastError();
throw new FileIOException(err, path);
}
}
private static bool FileExists(string file)
{
bool zero = false;
IntPtr intPtr = Stdlib.fopen(file, "r");
zero = intPtr != IntPtr.Zero;
if (intPtr != IntPtr.Zero)
{
Stdlib.fclose(intPtr);
}
return(zero);
}
private static IntPtr Fopen(string path, string mode)
{
if (path == null)
{
throw new ArgumentNullException("path");
}
if (path.Length == 0)
{
throw new ArgumentException("path");
}
if (mode == null)
{
throw new ArgumentNullException("mode");
}
IntPtr intPtr = Stdlib.fopen(path, mode);
if (intPtr == IntPtr.Zero)
{
throw new DirectoryNotFoundException("path", UnixMarshal.CreateExceptionForLastError());
}
return(intPtr);
}