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/*
* This source file is part of libRocket, the HTML/CSS Interface Middleware
*
* For the latest information, see http://www.librocket.com
*
* Copyright (c) 2008-2010 CodePoint Ltd, Shift Technology Ltd
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
*/
#include "precompiled.h"
#include "../../Include/Rocket/Core/Stream.h"
#include <algorithm>
#include <stdio.h>
namespace Rocket {
namespace Core {
const size_t READ_BLOCK_SIZE = 1024;
Stream::Stream() : ReferenceCountable(1)
{
stream_mode = 0;
}
Stream::~Stream()
{
}
void Stream::Close()
{
stream_mode = 0;
}
// Returns the mode the stream was opened in.
int Stream::GetStreamMode() const
{
return stream_mode;
}
// Returns the source url (if available)
const URL& Stream::GetSourceURL() const
{
return url;
}
bool Stream::IsEOS() const
{
return Tell() >= Length();
}
size_t Stream::Peek(void* buffer, size_t bytes) const
{
size_t pos = Tell();
size_t read = Read( buffer, bytes );
Seek( (long)pos, SEEK_SET );
return read;
}
// Read from one stream into another
size_t Stream::Read(Stream* stream, size_t bytes) const
{
byte buffer[ READ_BLOCK_SIZE ];
size_t total_bytes_read = 0;
while (total_bytes_read < bytes)
{
size_t bytes_read = this->Read(buffer, Core::Math::Min(READ_BLOCK_SIZE, bytes - total_bytes_read));
if (bytes_read < 1)
return total_bytes_read;
stream->Write(buffer, bytes_read);
total_bytes_read += bytes_read;
}
return total_bytes_read;
}
// Read from one stream into another
size_t Stream::Read(String& string, size_t bytes) const
{
size_t string_size = string.Length();
string.Resize(string_size + bytes + 1);
size_t read = Read(&string[string_size], bytes);
string[string_size + read] = '\0';
string.Resize(string_size + read);
return read;
}
/// Write to this stream from another stream
size_t Stream::Write(const Stream* stream, size_t bytes)
{
return stream->Read(this, bytes);
}
size_t Stream::Write(const char* string)
{
return Write(string, strlen(string));
}
size_t Stream::Write(const String& string)
{
return Write(string.CString(), string.Length());
}
// Push onto the front of the stream
size_t Stream::PushFront(const void* ROCKET_UNUSED_PARAMETER(buffer), size_t ROCKET_UNUSED_PARAMETER(bytes))
{
ROCKET_UNUSED(buffer);
ROCKET_UNUSED(bytes);
ROCKET_ERRORMSG("No generic way to PushFront to a stream.");
return false;
}
// Push onto the back of the stream
size_t Stream::PushBack(const void* buffer, size_t bytes)
{
size_t pos = Tell();
Seek(0, SEEK_END);
size_t wrote = Write(buffer, bytes);
Seek((long)pos, SEEK_SET);
return wrote;
}
// Push onto the front of the stream
size_t Stream::PopFront(size_t ROCKET_UNUSED_PARAMETER(bytes))
{
ROCKET_UNUSED(bytes);
ROCKET_ERRORMSG("No generic way to PopFront from a stream.");
return 0;
}
// Push onto the back of the stream
size_t Stream::PopBack(size_t bytes)
{
return Truncate(Length() - bytes);
}
// Sets the mode on the stream; should be called by a stream when it is opened.
void Stream::SetStreamDetails(const URL& _url, int _stream_mode)
{
url = _url;
stream_mode = _stream_mode;
}
// Deletes the stream.
void Stream::OnReferenceDeactivate()
{
Close();
delete this;
}
}
}
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