| public Seek ( long offset, SeekOrigin origin ) : void | ||
| offset | long | |
| origin | SeekOrigin | |
| return | void | |
private static void Seek(RubyIO /*!*/ self, long pos, int seekOrigin)
{
if (seekOrigin < 0 || seekOrigin > 2)
{
throw RubyExceptions.CreateArgumentError("Invalid argument");
}
if (self.IsConsoleDescriptor())
{
throw new Errno.BadFileDescriptorError();
}
// TODO: make sure we assert stream is not actually closed
if (self.Closed)
{
throw RubyExceptions.CreateArgumentError("trying to seek on a non-existent stream?");
}
SeekOrigin origin = SeekOrigin.Current;
if (seekOrigin == SEEK_SET)
{
origin = SeekOrigin.Begin;
}
else if (seekOrigin == SEEK_END)
{
origin = SeekOrigin.End;
}
self.Seek(pos, origin);
}
public static void Pos(RubyIO /*!*/ self, [DefaultProtocol] int value)
{
if (self.IsConsoleDescriptor())
{
throw new Errno.BadFileDescriptorError();
}
self.Seek(value, SeekOrigin.Begin);
}
public static MutableString /*!*/ Read(RubyClass /*!*/ self,
[DefaultProtocol, NotNull] MutableString /*!*/ path, [DefaultProtocol] int length, [DefaultProtocol, Optional] int offset)
{
if (offset < 0)
{
throw new Errno.InvalidError();
}
if (length < 0)
{
throw RubyExceptions.CreateArgumentError(String.Format("negative length {0} given", length));
}
using (RubyIO io = OpenFileForRead(self.Context, path)) {
if (offset > 0)
{
io.Seek(offset, SeekOrigin.Begin);
}
return(Read(io, length, null));
}
}
public static void Pos(RubyIO/*!*/ self, [DefaultProtocol]IntegerValue pos) {
self.Seek(pos.ToInt64(), SeekOrigin.Begin);
}
public static object SysSeek(RubyIO/*!*/ self, [DefaultProtocol]IntegerValue pos, [DefaultProtocol, DefaultParameterValue(SEEK_SET)]int seekOrigin) {
self.Flush();
self.Seek(pos.ToInt64(), RubyIO.ToSeekOrigin(seekOrigin));
return pos.ToObject();
}
public static int Seek(RubyIO/*!*/ self, [DefaultProtocol]IntegerValue pos, [DefaultProtocol, DefaultParameterValue(SEEK_SET)]int seekOrigin) {
self.Seek(pos.ToInt64(), RubyIO.ToSeekOrigin(seekOrigin));
return 0;
}
public static void Rewind(RubyContext/*!*/ context, RubyIO/*!*/ self) {
self.Seek(0, SeekOrigin.Begin);
self.LineNumber = 0;
}
public static void Pos(RubyIO/*!*/ self, [DefaultProtocol]int value) {
if (self.IsConsoleDescriptor()) {
throw new Errno.BadFileDescriptorError();
}
self.Seek(value, SeekOrigin.Begin);
}
private static void Seek(RubyIO/*!*/ self, long pos, int seekOrigin) {
if (seekOrigin < 0 || seekOrigin > 2) {
throw RubyExceptions.CreateArgumentError("Invalid argument");
}
if (self.IsConsoleDescriptor()) {
throw new Errno.BadFileDescriptorError();
}
// TODO: make sure we assert stream is not actually closed
if (self.Closed) {
throw RubyExceptions.CreateArgumentError("trying to seek on a non-existent stream?");
}
SeekOrigin origin = SeekOrigin.Current;
if (seekOrigin == SEEK_SET) {
origin = SeekOrigin.Begin;
} else if (seekOrigin == SEEK_END) {
origin = SeekOrigin.End;
}
self.Seek(pos, origin);
}
public static void Pos(RubyIO /*!*/ self, [DefaultProtocol] IntegerValue pos)
{
self.Seek(pos.ToInt64(), SeekOrigin.Begin);
}
public static object SysSeek(RubyIO /*!*/ self, [DefaultProtocol] IntegerValue pos, [DefaultProtocol, DefaultParameterValue(SEEK_SET)] int seekOrigin)
{
self.Flush();
self.Seek(pos.ToInt64(), RubyIO.ToSeekOrigin(seekOrigin));
return(pos.ToObject());
}
public static int Seek(RubyIO /*!*/ self, [DefaultProtocol] IntegerValue pos, [DefaultProtocol, DefaultParameterValue(SEEK_SET)] int seekOrigin)
{
self.Seek(pos.ToInt64(), RubyIO.ToSeekOrigin(seekOrigin));
return(0);
}
public static void Rewind(RubyContext /*!*/ context, RubyIO /*!*/ self)
{
self.Seek(0, SeekOrigin.Begin);
self.LineNumber = 0;
}