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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.
*
* $URL$
* $Id$
*
*/
#include "common/endian.h"
#include "gob/gob.h"
#include "gob/variables.h"
#include "gob/helper.h"
namespace Gob {
Variables::Variables(uint32 size) {
_size = size;
_vars = new byte[_size];
clear();
}
Variables::~Variables() {
delete[] _vars;
}
uint32 Variables::getSize() const {
return _size;
}
void Variables::clear() {
memset(_vars, 0, _size);
}
void Variables::writeVar8(uint32 var, uint8 value) {
writeOff8(var * 4, value);
}
void Variables::writeVar16(uint32 var, uint16 value) {
writeOff16(var * 4, value);
}
void Variables::writeVar32(uint32 var, uint32 value) {
writeOff32(var * 4, value);
}
void Variables::writeVarString(uint32 var, const char *value) {
writeOffString(var * 4, value);
}
void Variables::writeOff8(uint32 offset, uint8 value) {
write8(_vars + offset, value);
}
void Variables::writeOff16(uint32 offset, uint16 value) {
write16(_vars + offset, value);
}
void Variables::writeOff32(uint32 offset, uint32 value) {
write32(_vars + offset, value);
}
void Variables::writeOffString(uint32 offset, const char *value) {
strcpy((char *) (_vars + offset), value);
}
uint8 Variables::readVar8(uint32 var) const {
return readOff8(var * 4);
}
uint16 Variables::readVar16(uint32 var) const {
return readOff16(var * 4);
}
uint32 Variables::readVar32(uint32 var) const {
return readOff32(var * 4);
}
void Variables::readVarString(uint32 var, char *value, uint32 length) {
readOffString(var * 4, value, length);
}
uint8 Variables::readOff8(uint32 offset) const {
return read8(_vars + offset);
}
uint16 Variables::readOff16(uint32 offset) const {
return read16(_vars + offset);
}
uint32 Variables::readOff32(uint32 offset) const {
return read32(_vars + offset);
}
void Variables::readOffString(uint32 offset, char *value, uint32 length) {
strncpy0(value, (const char *) (_vars + offset), length - 1);
}
const uint8 *Variables::getAddressVar8(uint32 var) const {
return getAddressOff8(var * 4);
}
uint8 *Variables::getAddressVar8(uint32 var) {
return getAddressOff8(var * 4);
}
const char *Variables::getAddressVarString(uint32 var) const {
return getAddressOffString(var * 4);
}
char *Variables::getAddressVarString(uint32 var) {
return getAddressOffString(var * 4);
}
const uint8 *Variables::getAddressOff8(uint32 offset) const {
return ((const uint8 *) (_vars + offset));
}
uint8 *Variables::getAddressOff8(uint32 offset) {
return ((uint8 *) (_vars + offset));
}
const char *Variables::getAddressOffString(uint32 offset) const {
return ((const char *) (_vars + offset));
}
char *Variables::getAddressOffString(uint32 offset) {
return ((char *) (_vars + offset));
}
bool Variables::copyTo(uint32 offset, byte *variables, uint32 n) const {
if ((offset + n) > _size)
return false;
if (variables)
memcpy(variables, _vars + offset, n);
return true;
}
bool Variables::copyFrom(uint32 offset, const byte *variables, uint32 n) {
if (((offset + n) > _size) || !variables)
return false;
memcpy(_vars + offset, variables, n);
return true;
}
VariablesLE::VariablesLE(uint32 size) : Variables(size) {
}
VariablesLE::~VariablesLE() {
}
void VariablesLE::write8(byte *buf, uint8 data) const {
*buf = (byte) data;
}
void VariablesLE::write16(byte *buf, uint16 data) const {
WRITE_LE_UINT16(buf, data);
}
void VariablesLE::write32(byte *buf, uint32 data) const {
WRITE_LE_UINT32(buf, data);
}
uint8 VariablesLE::read8(const byte *buf) const {
return (uint8) *buf;
}
uint16 VariablesLE::read16(const byte *buf) const {
return READ_LE_UINT16(buf);
}
uint32 VariablesLE::read32(const byte *buf) const {
return READ_LE_UINT32(buf);
}
VariablesBE::VariablesBE(uint32 size) : Variables(size) {
}
VariablesBE::~VariablesBE() {
}
void VariablesBE::write8(byte *buf, uint8 data) const {
*buf = (byte) data;
}
void VariablesBE::write16(byte *buf, uint16 data) const {
WRITE_BE_UINT16(buf, data);
}
void VariablesBE::write32(byte *buf, uint32 data) const {
WRITE_BE_UINT32(buf, data);
}
uint8 VariablesBE::read8(const byte *buf) const {
return (uint8) *buf;
}
uint16 VariablesBE::read16(const byte *buf) const {
return READ_BE_UINT16(buf);
}
uint32 VariablesBE::read32(const byte *buf) const {
return READ_BE_UINT32(buf);
}
VariableReference::VariableReference() {
_vars = 0;
_offset = 0;
}
VariableReference::VariableReference(Variables &vars, uint32 offset, Variables::Type type) {
set(vars, offset, type);
}
VariableReference::~VariableReference() {
}
void VariableReference::set(Variables &vars, uint32 offset, Variables::Type type) {
_vars = &vars;
_offset = offset;
_type = type;
}
VariableReference &VariableReference::operator=(uint32 value) {
if (_vars) {
switch (_type) {
case Variables::kVariableType8:
_vars->writeOff8(_offset, (uint8) value);
break;
case Variables::kVariableType16:
_vars->writeOff16(_offset, (uint16) value);
break;
case Variables::kVariableType32:
_vars->writeOff32(_offset, value);
break;
}
}
return *this;
}
VariableReference::operator uint32() {
if (_vars) {
switch (_type) {
case Variables::kVariableType8:
return (uint32) _vars->readOff8(_offset);
case Variables::kVariableType16:
return (uint32) _vars->readOff16(_offset);
case Variables::kVariableType32:
return _vars->readOff32(_offset);
}
}
return 0;
}
VariableReference &VariableReference::operator+=(uint32 value) {
return (*this = (*this + value));
}
VariableReference &VariableReference::operator*=(uint32 value) {
return (*this = (*this * value));
}
} // End of namespace Gob
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