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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
/*
* This file is based on WME Lite.
* http://dead-code.org/redir.php?target=wmelite
* Copyright (c) 2011 Jan Nedoma
*/
#include "dcgf.h"
#include "BPackage.h"
#include "BPkgFile.h"
#include "BGame.h"
#include "BFileManager.h"
#include "common/util.h"
#if _DEBUG
#pragma comment(lib, "zlib_d.lib")
#else
#pragma comment(lib, "zlib.lib")
#endif
extern "C" {
#include "zlib.h"
}
namespace WinterMute {
//////////////////////////////////////////////////////////////////////////
CBPkgFile::CBPkgFile(CBGame *inGame): CBFile(inGame) {
m_FileEntry = NULL;
m_File = NULL;
m_Compressed = false;
m_Stream.zalloc = (alloc_func)0;
m_Stream.zfree = (free_func)0;
m_Stream.opaque = (voidpf)0;
m_InflateInit = false;
}
//////////////////////////////////////////////////////////////////////////
CBPkgFile::~CBPkgFile() {
Close();
}
//////////////////////////////////////////////////////////////////////////
HRESULT CBPkgFile::Open(Common::String Filename) {
Close();
char fileName[MAX_PATH];
strcpy(fileName, Filename.c_str());
// correct slashes
for (int i = 0; i < strlen(fileName); i++) {
if (fileName[i] == '/') fileName[i] = '\\';
}
m_FileEntry = Game->m_FileManager->GetPackageEntry(fileName);
if (!m_FileEntry) return E_FAIL;
m_File = m_FileEntry->m_Package->GetFilePointer();
if (!m_File) return E_FAIL;
m_Compressed = (m_FileEntry->m_CompressedLength != 0);
m_Size = m_FileEntry->m_Length;
SeekToPos(0);
return S_OK;
}
//////////////////////////////////////////////////////////////////////////
HRESULT CBPkgFile::Close() {
if (m_FileEntry) {
m_FileEntry->m_Package->CloseFilePointer(m_File);
m_FileEntry = NULL;
}
m_File = NULL;
m_Pos = 0;
m_Size = 0;
if (m_InflateInit) inflateEnd(&m_Stream);
m_InflateInit = false;
return S_OK;
}
//////////////////////////////////////////////////////////////////////////
HRESULT CBPkgFile::Read(void *Buffer, uint32 Size) {
if (!m_FileEntry) return E_FAIL;
HRESULT ret = S_OK;
if (m_Pos + Size > m_Size) {
Size = m_Size - m_Pos;
if (Size == 0) return E_FAIL;
}
if (m_Compressed) {
uint32 InitOut = m_Stream.total_out;
m_Stream.avail_out = Size;
m_Stream.next_out = (byte *)Buffer;
while (m_Stream.total_out - InitOut < Size && m_Stream.total_in < m_FileEntry->m_CompressedLength) {
// needs to read more data?
if (m_Stream.avail_in == 0) {
m_Stream.avail_in = MIN((long unsigned int)COMPRESSED_BUFFER_SIZE, m_FileEntry->m_CompressedLength - m_Stream.total_in); // TODO: long unsigned int????
m_FileEntry->m_Package->Read(m_File, m_FileEntry->m_Offset + m_Stream.total_in, m_CompBuffer, m_Stream.avail_in);
m_Stream.next_in = m_CompBuffer;
}
int res = inflate(&m_Stream, Z_SYNC_FLUSH);
if (res != Z_OK && res != Z_STREAM_END) {
Game->LOG(0, "zlib error: %d", res);
ret = E_FAIL;
break;
}
}
} else {
ret = m_FileEntry->m_Package->Read(m_File, m_FileEntry->m_Offset + m_Pos, (byte *)Buffer, Size);
}
m_Pos += Size;
return ret;
}
//////////////////////////////////////////////////////////////////////////
HRESULT CBPkgFile::Seek(uint32 Pos, TSeek Origin) {
if (!m_FileEntry) return E_FAIL;
uint32 NewPos = 0;
switch (Origin) {
case SEEK_TO_BEGIN:
NewPos = Pos;
break;
case SEEK_TO_END:
NewPos = m_Size + Pos;
break;
case SEEK_TO_CURRENT:
NewPos = m_Pos + Pos;
break;
}
if (NewPos < 0 || NewPos > m_Size) return E_FAIL;
return SeekToPos(NewPos);
}
#define STREAM_BUFFER_SIZE 4096
//////////////////////////////////////////////////////////////////////////
HRESULT CBPkgFile::SeekToPos(uint32 NewPos) {
HRESULT ret = S_OK;
// seek compressed stream to NewPos
if (m_Compressed) {
byte StreamBuffer[STREAM_BUFFER_SIZE];
if (m_InflateInit) inflateEnd(&m_Stream);
m_InflateInit = false;
m_Stream.avail_in = 0;
m_Stream.next_in = m_CompBuffer;
m_Stream.avail_out = MIN((uint32)STREAM_BUFFER_SIZE, NewPos); //TODO: remove cast.
m_Stream.next_out = StreamBuffer;
inflateInit(&m_Stream);
m_InflateInit = true;
while (m_Stream.total_out < NewPos && m_Stream.total_in < m_FileEntry->m_CompressedLength) {
// needs to read more data?
if (m_Stream.avail_in == 0) {
m_Stream.avail_in = MIN((long unsigned int)COMPRESSED_BUFFER_SIZE, m_FileEntry->m_CompressedLength - m_Stream.total_in); // TODO: long unsigned int???
m_FileEntry->m_Package->Read(m_File, m_FileEntry->m_Offset + m_Stream.total_in, m_CompBuffer, m_Stream.avail_in);
m_Stream.next_in = m_CompBuffer;
}
// needs more space?
if (m_Stream.avail_out == 0) {
m_Stream.next_out = StreamBuffer;
m_Stream.avail_out = MIN((long unsigned int)STREAM_BUFFER_SIZE, NewPos - m_Stream.total_out); // TODO: long unsigned int???.
}
// stream on!
int res = inflate(&m_Stream, Z_SYNC_FLUSH);
if (res != Z_OK && res != Z_STREAM_END) {
ret = E_FAIL;
break;
}
}
}
m_Pos = NewPos;
return ret;
}
} // end of namespace WinterMute
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