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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.
*
* $URL$
* $Id$
*
*/
/*
* 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"
#include "sword25/kernel/inputpersistenceblock.h"
namespace Sword25 {
InputPersistenceBlock::InputPersistenceBlock(const void *data, uint dataLength) :
_data(static_cast<const byte *>(data), dataLength),
_errorState(NONE) {
_iter = _data.begin();
}
InputPersistenceBlock::~InputPersistenceBlock() {
if (_iter != _data.end())
BS_LOG_WARNINGLN("Persistence block was not read to the end.");
}
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::readString(Common::String &value) {
value = "";
if (checkMarker(STRING_MARKER)) {
uint size;
read(size);
if (checkBlockSize(size)) {
value = Common::String(reinterpret_cast<const char *>(&*_iter), size);
_iter += size;
}
}
}
void InputPersistenceBlock::readByteArray(Common::Array<byte> &value) {
if (checkMarker(BLOCK_MARKER)) {
uint size;
read(size);
if (checkBlockSize(size)) {
value = Common::Array<byte>(_iter, size);
_iter += size;
}
}
}
void InputPersistenceBlock::rawRead(void *destPtr, size_t size) {
if (checkBlockSize(size)) {
memcpy(destPtr, &*_iter, size);
_iter += size;
}
}
bool InputPersistenceBlock::checkBlockSize(int size) {
if (_data.end() - _iter >= size) {
return true;
} else {
_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 (*_iter++ == marker) {
return true;
} else {
_errorState = OUT_OF_SYNC;
BS_LOG_ERRORLN("Wrong type marker found in persistence block.");
return false;
}
}
} // End of namespace Sword25
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