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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.
*
*/
#ifndef SCI_ENGINE_OBJECT_H
#define SCI_ENGINE_OBJECT_H
#include "common/array.h"
#include "common/serializer.h"
#include "common/textconsole.h"
#include "sci/sci.h" // for the SCI versions
#include "sci/engine/vm_types.h" // for reg_t
#include "sci/util.h"
namespace Sci {
class SegManager;
/** Clone has been marked as 'freed' */
enum {
OBJECT_FLAG_FREED = (1 << 0)
};
enum infoSelectorFlags {
kInfoFlagClone = 0x0001,
#ifdef ENABLE_SCI32
/**
* When set, indicates to game scripts that a screen
* item can be updated.
*/
kInfoFlagViewVisible = 0x0008, // TODO: "dirty" ?
/**
* When set, the object has an associated screen item in
* the rendering tree.
*/
kInfoFlagViewInserted = 0x0010,
#endif
kInfoFlagClass = 0x8000
};
enum ObjectOffsets {
kOffsetLocalVariables = -6,
kOffsetFunctionArea = -4,
kOffsetSelectorCounter = -2,
kOffsetSelectorSegment = 0,
kOffsetInfoSelectorSci0 = 4,
kOffsetNamePointerSci0 = 6,
kOffsetInfoSelectorSci11 = 14,
kOffsetNamePointerSci11 = 16
};
class Object {
public:
Object() {
_offset = getSciVersion() < SCI_VERSION_1_1 ? 0 : 5;
_flags = 0;
_baseObj = 0;
_baseVars = 0;
_methodCount = 0;
_propertyOffsetsSci3 = 0;
}
~Object() {
if (getSciVersion() == SCI_VERSION_3) {
// FIXME: memory leak! Commented out because of reported heap
// corruption by MSVC (e.g. in LSL7, when it starts)
//free(_baseVars);
//_baseVars = 0;
//free(_propertyOffsetsSci3);
//_propertyOffsetsSci3 = 0;
}
}
reg_t getSpeciesSelector() const {
if (getSciVersion() < SCI_VERSION_3)
return _variables[_offset];
else // SCI3
return _speciesSelectorSci3;
}
void setSpeciesSelector(reg_t value) {
if (getSciVersion() < SCI_VERSION_3)
_variables[_offset] = value;
else // SCI3
_speciesSelectorSci3 = value;
}
reg_t getSuperClassSelector() const {
if (getSciVersion() < SCI_VERSION_3)
return _variables[_offset + 1];
else // SCI3
return _superClassPosSci3;
}
void setSuperClassSelector(reg_t value) {
if (getSciVersion() < SCI_VERSION_3)
_variables[_offset + 1] = value;
else // SCI3
_superClassPosSci3 = value;
}
reg_t getInfoSelector() const {
if (getSciVersion() < SCI_VERSION_3)
return _variables[_offset + 2];
else // SCI3
return _infoSelectorSci3;
}
void setInfoSelector(reg_t info) {
if (getSciVersion() < SCI_VERSION_3)
_variables[_offset + 2] = info;
else // SCI3
_infoSelectorSci3 = info;
}
#ifdef ENABLE_SCI32
void setInfoSelectorFlag(infoSelectorFlags flag) {
if (getSciVersion() < SCI_VERSION_3) {
_variables[_offset + 2] |= flag;
} else {
_infoSelectorSci3 |= flag;
}
}
// NOTE: In real engine, -info- is treated as byte size
void clearInfoSelectorFlag(infoSelectorFlags flag) {
if (getSciVersion() < SCI_VERSION_3) {
_variables[_offset + 2] &= ~flag;
} else {
_infoSelectorSci3 &= ~flag;
}
}
#endif
reg_t getNameSelector() const {
if (getSciVersion() < SCI_VERSION_3)
return _offset + 3 < (uint16)_variables.size() ? _variables[_offset + 3] : NULL_REG;
else // SCI3
return _variables.size() ? _variables[0] : NULL_REG;
}
// No setter for the name selector
reg_t getPropDictSelector() const {
if (getSciVersion() < SCI_VERSION_3)
return _variables[2];
else
// This should never occur, this is called from a SCI1.1 - SCI2.1 only function
error("getPropDictSelector called for SCI3");
}
void setPropDictSelector(reg_t value) {
if (getSciVersion() < SCI_VERSION_3)
_variables[2] = value;
else
// This should never occur, this is called from a SCI1.1 - SCI2.1 only function
error("setPropDictSelector called for SCI3");
}
reg_t getClassScriptSelector() const {
if (getSciVersion() < SCI_VERSION_3)
return _variables[4];
else // SCI3
return make_reg(0, READ_SCI11ENDIAN_UINT16(_baseObj + 6));
}
void setClassScriptSelector(reg_t value) {
if (getSciVersion() < SCI_VERSION_3)
_variables[4] = value;
else // SCI3
// This should never occur, this is called from a SCI1.1 - SCI2.1 only function
error("setClassScriptSelector called for SCI3");
}
Selector getVarSelector(uint16 i) const { return READ_SCI11ENDIAN_UINT16(_baseVars + i); }
reg_t getFunction(uint16 i) const {
uint16 offset = (getSciVersion() < SCI_VERSION_1_1) ? _methodCount + 1 + i : i * 2 + 2;
if (getSciVersion() == SCI_VERSION_3)
offset--;
return make_reg(_pos.getSegment(), _baseMethod[offset]);
}
Selector getFuncSelector(uint16 i) const {
uint16 offset = (getSciVersion() < SCI_VERSION_1_1) ? i : i * 2 + 1;
if (getSciVersion() == SCI_VERSION_3)
offset--;
return _baseMethod[offset];
}
/**
* Determines if this object is a class and explicitly defines the
* selector as a funcselector. Does NOT say anything about the object's
* superclasses, i.e. failure may be returned even if one of the
* superclasses defines the funcselector
*/
int funcSelectorPosition(Selector sel) const {
for (uint i = 0; i < _methodCount; i++)
if (getFuncSelector(i) == sel)
return i;
return -1;
}
/**
* Determines if the object explicitly defines slc as a varselector.
* Returns -1 if not found.
*/
int locateVarSelector(SegManager *segMan, Selector slc) const;
bool isClass() const { return (getInfoSelector().getOffset() & kInfoFlagClass); }
const Object *getClass(SegManager *segMan) const;
void markAsFreed() { _flags |= OBJECT_FLAG_FREED; }
bool isFreed() const { return _flags & OBJECT_FLAG_FREED; }
uint getVarCount() const { return _variables.size(); }
void init(byte *buf, reg_t obj_pos, bool initVariables = true);
reg_t getVariable(uint var) const { return _variables[var]; }
reg_t &getVariableRef(uint var) { return _variables[var]; }
uint16 getMethodCount() const { return _methodCount; }
reg_t getPos() const { return _pos; }
void saveLoadWithSerializer(Common::Serializer &ser);
void cloneFromObject(const Object *obj) {
_baseObj = obj ? obj->_baseObj : NULL;
_baseMethod = obj ? obj->_baseMethod : Common::Array<uint16>();
_baseVars = obj ? obj->_baseVars : NULL;
}
bool relocateSci0Sci21(SegmentId segment, int location, size_t scriptSize);
bool relocateSci3(SegmentId segment, uint32 location, int offset, size_t scriptSize);
int propertyOffsetToId(SegManager *segMan, int propertyOffset) const;
void initSpecies(SegManager *segMan, reg_t addr);
void initSuperClass(SegManager *segMan, reg_t addr);
bool initBaseObject(SegManager *segMan, reg_t addr, bool doInitSuperClass = true);
void syncBaseObject(const byte *ptr) { _baseObj = ptr; }
private:
void initSelectorsSci3(const byte *buf);
const byte *_baseObj; /**< base + object offset within base */
const uint16 *_baseVars; /**< Pointer to the varselector area for this object */
Common::Array<uint16> _baseMethod; /**< Pointer to the method selector area for this object */
uint32 *_propertyOffsetsSci3; /**< This is used to enable relocation of property valuesa in SCI3 */
Common::Array<reg_t> _variables;
uint16 _methodCount;
int _flags;
uint16 _offset;
reg_t _pos; /**< Object offset within its script; for clones, this is their base */
reg_t _superClassPosSci3; /**< reg_t pointing to superclass for SCI3 */
reg_t _speciesSelectorSci3; /**< reg_t containing species "selector" for SCI3 */
reg_t _infoSelectorSci3; /**< reg_t containing info "selector" for SCI3 */
};
} // End of namespace Sci
#endif // SCI_ENGINE_OBJECT_H
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