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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.
+ *
+ * $URL$
+ * $Id$
+ *
+ */
+
+#ifndef SCI_ENGINE_OBJECT_H
+#define SCI_ENGINE_OBJECT_H
+
+#include "common/array.h"
+#include "common/serializer.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,
+ 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;
+ _baseMethod = 0;
+ _methodCount = 0;
+ _propertyOffsetsSci3 = 0;
+ }
+
+ ~Object() { }
+
+ reg_t getSpeciesSelector() const {
+ if (getSciVersion() <= SCI_VERSION_2_1)
+ return _variables[_offset];
+ else // SCI3
+ return _speciesSelectorSci3;
+ }
+
+ void setSpeciesSelector(reg_t value) {
+ if (getSciVersion() <= SCI_VERSION_2_1)
+ _variables[_offset] = value;
+ else // SCI3
+ _speciesSelectorSci3 = value;
+ }
+
+ reg_t getSuperClassSelector() const {
+ if (getSciVersion() <= SCI_VERSION_2_1)
+ return _variables[_offset + 1];
+ else // SCI3
+ return _superClassPosSci3;
+ }
+
+ void setSuperClassSelector(reg_t value) {
+ if (getSciVersion() <= SCI_VERSION_2_1)
+ _variables[_offset + 1] = value;
+ else // SCI3
+ _superClassPosSci3 = value;
+ }
+
+ reg_t getInfoSelector() const {
+ if (getSciVersion() <= SCI_VERSION_2_1)
+ return _variables[_offset + 2];
+ else // SCI3
+ return _infoSelectorSci3;
+ }
+
+ void setInfoSelector(reg_t info) {
+ if (getSciVersion() <= SCI_VERSION_2_1)
+ _variables[_offset + 2] = info;
+ else // SCI3
+ _infoSelectorSci3 = info;
+ }
+
+ // No setter for the -info- selector
+
+ reg_t getNameSelector() const {
+ if (getSciVersion() <= SCI_VERSION_2_1)
+ 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_2_1)
+ 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_2_1)
+ _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_2_1)
+ return _variables[4];
+ else // SCI3
+ return make_reg(0, READ_SCI11ENDIAN_UINT16(_baseObj + 6));
+ }
+
+ void setClassScriptSelector(reg_t value) {
+ if (getSciVersion() <= SCI_VERSION_2_1)
+ _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.segment, READ_SCI11ENDIAN_UINT16(_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 READ_SCI11ENDIAN_UINT16(_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().offset & 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 : NULL;
+ _baseVars = obj ? obj->_baseVars : NULL;
+ }
+
+ bool relocateSci0Sci21(SegmentId segment, int location, size_t scriptSize);
+ bool relocateSci3(SegmentId segment, int 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 */
+ const uint16 *_baseMethod; /**< Pointer to the method selector area for this object */
+ const uint16 *_propertyOffsetsSci3;
+
+ 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_SEGMENT_H