mirror of
https://github.com/libretro/scummvm.git
synced 2024-12-25 03:07:06 +00:00
374 lines
8.6 KiB
C++
374 lines
8.6 KiB
C++
/* 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"
|
|
|
|
namespace Gob {
|
|
|
|
Variables::Variables(uint32 size) {
|
|
_size = size;
|
|
|
|
_vars = new byte[_size];
|
|
_sizes = new byte[_size];
|
|
|
|
clear();
|
|
}
|
|
|
|
Variables::~Variables() {
|
|
delete[] _vars;
|
|
delete[] _sizes;
|
|
}
|
|
|
|
uint32 Variables::getSize() const {
|
|
return _size;
|
|
}
|
|
|
|
void Variables::clear() {
|
|
memset(_vars, 0, _size);
|
|
|
|
// All variables are 32 bit wide per default
|
|
memset(_sizes, 0, _size);
|
|
for (uint32 i = 0; i < _size; i += 4)
|
|
_sizes[i] = kSize32;
|
|
}
|
|
|
|
void Variables::clearSize(uint32 offset) {
|
|
uint32 inVar = offset % 4;
|
|
uint32 varOff = (offset >> 2) << 2;
|
|
|
|
// Clearing out the old size
|
|
for (uint32 i = 0; i < 4; i++) {
|
|
if (_sizes[varOff + i] == kSize32)
|
|
_sizes[varOff + i] = kSize8;
|
|
else if ((inVar == (i + 1)) && (_sizes[varOff + i] == kSize16))
|
|
_sizes[varOff + i] = kSize8;
|
|
}
|
|
}
|
|
|
|
void Variables::writeSize(uint32 offset, byte n) {
|
|
clearSize(offset);
|
|
|
|
_sizes[offset] = n;
|
|
// Setting following bytes of size to 8 bit, for easy clearing out afterwards
|
|
for (; n > 0; n--)
|
|
_sizes[offset + n] = kSize8;
|
|
}
|
|
|
|
void Variables::writeSizeString(uint32 offset, uint32 length) {
|
|
clearSize(offset);
|
|
|
|
memset(_sizes + offset, kSize8, length);
|
|
}
|
|
|
|
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);
|
|
writeSize(offset, kSize8);
|
|
}
|
|
|
|
void Variables::writeOff16(uint32 offset, uint16 value) {
|
|
write16(_vars + offset, value);
|
|
writeSize(offset, kSize16);
|
|
}
|
|
|
|
void Variables::writeOff32(uint32 offset, uint32 value) {
|
|
write32(_vars + offset, value);
|
|
writeSize(offset, kSize32);
|
|
}
|
|
|
|
void Variables::writeOffString(uint32 offset, const char *value) {
|
|
strcpy((char *) (_vars + offset), value);
|
|
writeSizeString(offset, strlen(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, uint32 n) {
|
|
return getAddressOff8(var * 4, n);
|
|
}
|
|
|
|
const uint16 *Variables::getAddressVar16(uint32 var) const {
|
|
return getAddressOff16(var * 4);
|
|
}
|
|
|
|
uint16 *Variables::getAddressVar16(uint32 var, uint32 n) {
|
|
return getAddressOff16(var * 4, n);
|
|
}
|
|
|
|
const uint32 *Variables::getAddressVar32(uint32 var) const {
|
|
return getAddressOff32(var * 4);
|
|
}
|
|
|
|
uint32 *Variables::getAddressVar32(uint32 var, uint32 n) {
|
|
return getAddressOff32(var * 4, n);
|
|
}
|
|
|
|
const char *Variables::getAddressVarString(uint32 var) const {
|
|
return getAddressOffString(var * 4);
|
|
}
|
|
|
|
char *Variables::getAddressVarString(uint32 var, uint32 n) {
|
|
return getAddressOffString(var * 4, n);
|
|
}
|
|
|
|
const uint8 *Variables::getAddressOff8(uint32 offset) const {
|
|
return ((const uint8 *) (_vars + offset));
|
|
}
|
|
|
|
uint8 *Variables::getAddressOff8(uint32 offset, uint32 n) {
|
|
for (uint32 i = 0; i < n; i++)
|
|
writeSize(offset + i, kSize8);
|
|
|
|
return ((uint8 *) (_vars + offset));
|
|
}
|
|
|
|
const uint16 *Variables::getAddressOff16(uint32 offset) const {
|
|
return ((const uint16 *) (_vars + offset));
|
|
}
|
|
|
|
uint16 *Variables::getAddressOff16(uint32 offset, uint32 n) {
|
|
for (uint32 i = 0; i < n; i++)
|
|
writeSize(offset + i * 2, kSize16);
|
|
|
|
return ((uint16 *) (_vars + offset));
|
|
}
|
|
|
|
const uint32 *Variables::getAddressOff32(uint32 offset) const {
|
|
return ((const uint32 *) (_vars + offset));
|
|
}
|
|
|
|
uint32 *Variables::getAddressOff32(uint32 offset, uint32 n) {
|
|
for (uint32 i = 0; i < n; i++)
|
|
writeSize(offset + i * 4, kSize32);
|
|
|
|
return ((uint32 *) (_vars + offset));
|
|
}
|
|
|
|
const char *Variables::getAddressOffString(uint32 offset) const {
|
|
return ((const char *) (_vars + offset));
|
|
}
|
|
|
|
char *Variables::getAddressOffString(uint32 offset, uint32 n) {
|
|
writeSizeString(offset, (n == 0xFFFFFFFF) ? strlen((char *) (_vars + offset)) : n);
|
|
|
|
return ((char *) (_vars + offset));
|
|
}
|
|
|
|
bool Variables::copyTo(uint32 offset, byte *variables, byte *sizes, uint32 n) const {
|
|
if ((offset + n) > _size)
|
|
return false;
|
|
|
|
if (variables)
|
|
memcpy(variables, _vars + offset, n);
|
|
if (sizes)
|
|
memcpy(sizes, _sizes + offset, n);
|
|
|
|
return true;
|
|
}
|
|
|
|
bool Variables::copyFrom(uint32 offset, const byte *variables, const byte *sizes, uint32 n) {
|
|
if (((offset + n) > _size) || !variables || !sizes)
|
|
return false;
|
|
|
|
memcpy(_vars + offset, variables, n);
|
|
memcpy(_sizes + offset, sizes, 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
|