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);
}
private void InitStream(IntPtr fileStream, bool ownsHandle)
{
if (StdioFileStream.InvalidFileStream == fileStream)
{
throw new ArgumentException(Locale.GetText("Invalid file stream"), "fileStream");
}
this.file = fileStream;
this.owner = ownsHandle;
try
{
if ((long)Stdlib.fseek(this.file, (long)0, SeekFlags.SEEK_CUR) != (long)-1)
{
this.canSeek = true;
}
Stdlib.fread(IntPtr.Zero, (ulong)0, (ulong)0, this.file);
if (Stdlib.ferror(this.file) == 0)
{
this.canRead = true;
}
Stdlib.fwrite(IntPtr.Zero, (ulong)0, (ulong)0, this.file);
if (Stdlib.ferror(this.file) == 0)
{
this.canWrite = true;
}
Stdlib.clearerr(this.file);
}
catch (Exception exception)
{
throw new ArgumentException(Locale.GetText("Invalid file stream"), "fileStream");
}
GC.KeepAlive(this);
}
public override int Read([In][Out] byte[] buffer, int offset, int count)
{
unsafe
{
this.AssertNotDisposed();
this.AssertValidBuffer(buffer, offset, count);
if (!this.CanRead)
{
throw new NotSupportedException("Stream does not support reading");
}
ulong num = (ulong)0;
fixed(byte *numPointer = &buffer[offset])
{
num = Stdlib.fread(numPointer, (ulong)1, (ulong)count, this.file);
}
if (num != (long)count && Stdlib.ferror(this.file) != 0)
{
throw new IOException();
}
GC.KeepAlive(this);
return((int)num);
}
}