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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 "sci/sci.h"
#include "sci/resource.h"
#include "sci/engine/state.h"
#include "sci/engine/kernel_types.h"
#include "sci/engine/kernel.h"
namespace Sci {
// Loads arbitrary resources of type 'restype' with resource numbers 'resnrs'
// This implementation ignores all resource numbers except the first one.
reg_t kLoad(EngineState *s, int, int argc, reg_t *argv) {
int restype = argv[0].toUint16();
int resnr = argv[1].toUint16();
// Request to dynamically allocate hunk memory for later use
if (restype == kResourceTypeMemory)
return kalloc(s->segMan, "kLoad()", resnr);
return make_reg(0, ((restype << 11) | resnr)); // Return the resource identifier as handle
}
reg_t kLock(EngineState *s, int, int argc, reg_t *argv) {
int state = argc > 2 ? argv[2].toUint16() : 1;
ResourceType type = (ResourceType)(argv[0].toUint16() & 0x7f);
ResourceId id = ResourceId(type, argv[1].toUint16());
Resource *which;
switch (state) {
case 1 :
s->resMan->findResource(id, 1);
break;
case 0 :
which = s->resMan->findResource(id, 0);
if (which)
s->resMan->unlockResource(which);
else {
if (id.type == kResourceTypeInvalid)
warning("[resMan] Attempt to unlock resource %i of invalid type %i", id.number, type);
else
warning("[resMan] Attempt to unlock non-existant resource %s", id.toString().c_str());
}
break;
}
return s->r_acc;
}
// Unloads an arbitrary resource of type 'restype' with resource numbber 'resnr'
reg_t kUnLoad(EngineState *s, int, int argc, reg_t *argv) {
int restype = argv[0].toUint16();
reg_t resnr = argv[1];
if (restype == kResourceTypeMemory)
kfree(s->segMan, resnr);
return s->r_acc;
}
reg_t kResCheck(EngineState *s, int, int argc, reg_t *argv) {
Resource *res = NULL;
ResourceType restype = (ResourceType)(argv[0].toUint16() & 0x7f);
if ((restype == kResourceTypeAudio36) || (restype == kResourceTypeSync36)) {
if (argc >= 6) {
uint noun = argv[2].toUint16() & 0xff;
uint verb = argv[3].toUint16() & 0xff;
uint cond = argv[4].toUint16() & 0xff;
uint seq = argv[5].toUint16() & 0xff;
res = s->resMan->testResource(ResourceId(restype, argv[1].toUint16(), noun, verb, cond, seq));
}
} else {
res = s->resMan->testResource(ResourceId(restype, argv[1].toUint16()));
}
return make_reg(0, res != NULL);
}
reg_t kClone(EngineState *s, int, int argc, reg_t *argv) {
reg_t parent_addr = argv[0];
Object *parent_obj = s->segMan->getObject(parent_addr);
reg_t clone_addr;
Clone *clone_obj; // same as Object*
if (!parent_obj) {
error("Attempt to clone non-object/class at %04x:%04x failed", PRINT_REG(parent_addr));
return NULL_REG;
}
debugC(2, kDebugLevelMemory, "Attempting to clone from %04x:%04x\n", PRINT_REG(parent_addr));
clone_obj = s->segMan->allocateClone(&clone_addr);
if (!clone_obj) {
error("Cloning %04x:%04x failed-- internal error", PRINT_REG(parent_addr));
return NULL_REG;
}
*clone_obj = *parent_obj;
clone_obj->_flags = 0;
// Mark as clone
clone_obj->setInfoSelector(make_reg(0, SCRIPT_INFO_CLONE));
clone_obj->setSpeciesSelector(clone_obj->_pos);
if (parent_obj->isClass())
clone_obj->setSuperClassSelector(parent_obj->_pos);
s->segMan->getScript(parent_obj->_pos.segment)->incrementLockers();
s->segMan->getScript(clone_obj->_pos.segment)->incrementLockers();
return clone_addr;
}
extern void _k_view_list_mark_free(EngineState *s, reg_t off);
reg_t kDisposeClone(EngineState *s, int, int argc, reg_t *argv) {
SegManager *segMan = s->segMan;
reg_t victim_addr = argv[0];
Clone *victim_obj = s->segMan->getObject(victim_addr);
uint16 underBits;
if (!victim_obj) {
error("Attempt to dispose non-class/object at %04x:%04x",
PRINT_REG(victim_addr));
return s->r_acc;
}
if (victim_obj->getInfoSelector().offset != SCRIPT_INFO_CLONE) {
//warning("Attempt to dispose something other than a clone at %04x", offset);
// SCI silently ignores this behaviour; some games actually depend on it
return s->r_acc;
}
underBits = GET_SEL32V(victim_addr, underBits);
if (underBits) {
warning("Clone %04x:%04x was cleared with underBits set", PRINT_REG(victim_addr));
}
#if 0
if (s->dyn_views) { // Free any widget associated with the clone
GfxWidget *widget = gfxw_set_id(gfxw_remove_ID(s->dyn_views, offset), GFXW_NO_ID);
if (widget && s->bg_widgets)
s->bg_widgets->add(GFXWC(s->bg_widgets), widget);
}
#endif
victim_obj->_flags |= OBJECT_FLAG_FREED;
_k_view_list_mark_free(s, victim_addr); // Free on view list, if neccessary
return s->r_acc;
}
// Returns script dispatch address index in the supplied script
reg_t kScriptID(EngineState *s, int, int argc, reg_t *argv) {
int script = argv[0].toUint16();
int index = (argc > 1) ? argv[1].toUint16() : 0;
if (argv[0].segment)
return argv[0];
SegmentId scriptSeg = s->segMan->getScriptSegment(script, SCRIPT_GET_LOAD);
Script *scr;
if (!scriptSeg)
return NULL_REG;
scr = s->segMan->getScript(scriptSeg);
if (!scr->_numExports) {
// FIXME: Is this fatal? This occurs in SQ4CD
warning("Script 0x%x does not have a dispatch table", script);
return NULL_REG;
}
if (index > scr->_numExports) {
error("Dispatch index too big: %d > %d", index, scr->_numExports);
return NULL_REG;
}
return make_reg(scriptSeg, s->segMan->validateExportFunc(index, scriptSeg));
}
reg_t kDisposeScript(EngineState *s, int, int argc, reg_t *argv) {
int script = argv[0].offset;
// Work around QfG1 graveyard bug
if (argv[0].segment)
return s->r_acc;
int id = s->segMan->getScriptSegment(script);
Script *scr = s->segMan->getScriptIfLoaded(id);
if (scr) {
if (s->_executionStack.back().addr.pc.segment != id)
scr->setLockers(1);
}
script_uninstantiate(s->segMan, script);
s->_executionStackPosChanged = true;
if (argc != 2) {
return s->r_acc;
} else {
// This exists in the KQ5CD interpreter, but a test case hasn't been found yet
warning("kDisposeScript called with 2 parameters, still untested");
return argv[1];
}
}
reg_t kIsObject(EngineState *s, int, int argc, reg_t *argv) {
if (argv[0].offset == 0xffff) // Treated specially
return NULL_REG;
else
return make_reg(0, s->segMan->isHeapObject(argv[0]));
}
reg_t kRespondsTo(EngineState *s, int, int argc, reg_t *argv) {
reg_t obj = argv[0];
int selector = argv[1].toUint16();
return make_reg(0, s->segMan->isHeapObject(obj) && lookup_selector(s->segMan, obj, selector, NULL, NULL) != kSelectorNone);
}
} // End of namespace Sci
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