diff options
Diffstat (limited to 'engines/sword25/kernel/inputpersistenceblock.cpp')
| -rw-r--r-- | engines/sword25/kernel/inputpersistenceblock.cpp | 182 |
1 files changed, 182 insertions, 0 deletions
diff --git a/engines/sword25/kernel/inputpersistenceblock.cpp b/engines/sword25/kernel/inputpersistenceblock.cpp new file mode 100644 index 0000000000..b51b1037a7 --- /dev/null +++ b/engines/sword25/kernel/inputpersistenceblock.cpp @@ -0,0 +1,182 @@ +/* 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. + * + * $URL$ + * $Id$ + * + */ + +/* + * This code is based on Broken Sword 2.5 engine + * + * Copyright (c) Malte Thiesen, Daniel Queteschiner and Michael Elsdoerfer + * + * Licensed under GNU GPL v2 + * + */ + +#define BS_LOG_PREFIX "INPUTPERSISTENCEBLOCK" + +// ----------------------------------------------------------------------------- +// Includes +// ----------------------------------------------------------------------------- + +#include "sword25/kernel/inputpersistenceblock.h" + +namespace Sword25 { + +// ----------------------------------------------------------------------------- +// Constructor / Destructor +// ----------------------------------------------------------------------------- + +InputPersistenceBlock::InputPersistenceBlock(const void *Data, uint DataLength) : + m_Data(static_cast<const byte *>(Data), DataLength), + m_ErrorState(NONE) { + m_Iter = m_Data.begin(); +} + +// ----------------------------------------------------------------------------- + +InputPersistenceBlock::~InputPersistenceBlock() { + if (m_Iter != m_Data.end()) BS_LOG_WARNINGLN("Persistence block was not read to the end."); +} + +// ----------------------------------------------------------------------------- +// Reading +// ----------------------------------------------------------------------------- + +void InputPersistenceBlock::read(int16 &Value) { + signed int v; + read(v); + Value = static_cast<int16>(v); +} + +// ----------------------------------------------------------------------------- + +void InputPersistenceBlock::read(signed int &Value) { + if (CheckMarker(SINT_MARKER)) { + RawRead(&Value, sizeof(signed int)); + Value = ConvertEndianessFromStorageToSystem(Value); + } else { + Value = 0; + } +} + +// ----------------------------------------------------------------------------- + +void InputPersistenceBlock::read(uint &Value) { + if (CheckMarker(UINT_MARKER)) { + RawRead(&Value, sizeof(uint)); + Value = ConvertEndianessFromStorageToSystem(Value); + } else { + Value = 0; + } +} + +// ----------------------------------------------------------------------------- + +void InputPersistenceBlock::read(float &Value) { + if (CheckMarker(FLOAT_MARKER)) { + RawRead(&Value, sizeof(float)); + Value = ConvertEndianessFromStorageToSystem(Value); + } else { + Value = 0.0f; + } +} + +// ----------------------------------------------------------------------------- + +void InputPersistenceBlock::read(bool &Value) { + if (CheckMarker(BOOL_MARKER)) { + uint UIntBool; + RawRead(&UIntBool, sizeof(float)); + UIntBool = ConvertEndianessFromStorageToSystem(UIntBool); + Value = UIntBool == 0 ? false : true; + } else { + Value = 0.0f; + } +} + +// ----------------------------------------------------------------------------- + +void InputPersistenceBlock::read(Common::String &Value) { + Value = ""; + + if (CheckMarker(STRING_MARKER)) { + uint Size; + read(Size); + + if (CheckBlockSize(Size)) { + Value = Common::String(reinterpret_cast<const char *>(&*m_Iter), Size); + m_Iter += Size; + } + } +} + +// ----------------------------------------------------------------------------- + +void InputPersistenceBlock::read(Common::Array<byte> &Value) { + if (CheckMarker(BLOCK_MARKER)) { + uint Size; + read(Size); + + if (CheckBlockSize(Size)) { + Value = Common::Array<byte>(m_Iter, Size); + m_Iter += Size; + } + } +} + +// ----------------------------------------------------------------------------- + +void InputPersistenceBlock::RawRead(void *DestPtr, size_t Size) { + if (CheckBlockSize(Size)) { + memcpy(DestPtr, &*m_Iter, Size); + m_Iter += Size; + } +} + +// ----------------------------------------------------------------------------- + +bool InputPersistenceBlock::CheckBlockSize(int Size) { + if (m_Data.end() - m_Iter >= Size) { + return true; + } else { + m_ErrorState = END_OF_DATA; + BS_LOG_ERRORLN("Unexpected end of persistence block."); + return false; + } +} + +// ----------------------------------------------------------------------------- + +bool InputPersistenceBlock::CheckMarker(byte Marker) { + if (!isGood() || !CheckBlockSize(1)) return false; + + if (*m_Iter++ == Marker) { + return true; + } else { + m_ErrorState = OUT_OF_SYNC; + BS_LOG_ERRORLN("Wrong type marker found in persistence block."); + return false; + } +} + +} // End of namespace Sword25 |