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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/system.h"
#include "sci/sci.h"
#include "sci/debug.h"
#include "sci/engine/state.h"
#include "sci/engine/kernel.h"
#include "sci/engine/gc.h"
#include "sci/gui/gui.h"
namespace Sci {
reg_t kRestartGame(EngineState *s, int argc, reg_t *argv) {
s->restarting_flags |= SCI_GAME_IS_RESTARTING_NOW;
s->restarting_flags &= ~SCI_GAME_WAS_RESTARTED_AT_LEAST_ONCE; // This appears to help
shrink_execution_stack(s, s->execution_stack_base + 1);
script_abort_flag = 1; // Force vm to abort ASAP
return NULL_REG;
}
/* kGameIsRestarting():
** Returns the restarting_flag in acc
*/
reg_t kGameIsRestarting(EngineState *s, int argc, reg_t *argv) {
s->r_acc = make_reg(0, (s->restarting_flags & SCI_GAME_WAS_RESTARTED));
if (argc) { // Only happens during replay
if (!argv[0].toUint16()) // Set restarting flag
s->restarting_flags &= ~SCI_GAME_WAS_RESTARTED;
}
return s->r_acc;
}
reg_t kHaveMouse(EngineState *s, int argc, reg_t *argv) {
return SIGNAL_REG;
}
enum kMemoryInfoFunc {
K_MEMORYINFO_LARGEST_HEAP_BLOCK = 0, // Largest heap block available
K_MEMORYINFO_FREE_HEAP = 1, // Total free heap memory
K_MEMORYINFO_LARGEST_HUNK_BLOCK = 2, // Largest available hunk memory block
K_MEMORYINFO_FREE_HUNK = 3, // Amount of free DOS paragraphs
K_MEMORYINFO_TOTAL_HUNK = 4 // Total amount of hunk memory (SCI01)
};
reg_t kMemoryInfo(EngineState *s, int argc, reg_t *argv) {
const uint16 size = 0x7fff; // Must not be 0xffff, or some memory calculations will overflow
switch (argv[0].offset) {
case K_MEMORYINFO_LARGEST_HEAP_BLOCK:
// In order to prevent "Memory fragmented" dialogs from
// popping up in some games, we must return FREE_HEAP - 2 here.
return make_reg(0, size - 2);
case K_MEMORYINFO_FREE_HEAP:
case K_MEMORYINFO_LARGEST_HUNK_BLOCK:
case K_MEMORYINFO_FREE_HUNK:
case K_MEMORYINFO_TOTAL_HUNK:
return make_reg(0, size);
default:
warning("Unknown MemoryInfo operation: %04x", argv[0].offset);
}
return NULL_REG;
}
reg_t kFlushResources(EngineState *s, int argc, reg_t *argv) {
run_gc(s);
debugC(2, kDebugLevelRoom, "Entering room number %d", argv[0].toUint16());
return s->r_acc;
}
reg_t kSetDebug(EngineState *s, int argc, reg_t *argv) {
printf("Debug mode activated\n");
g_debugState.seeking = kDebugSeekNothing;
g_debugState.runningStep = 0;
return s->r_acc;
}
enum {
K_NEW_GETTIME_TICKS = 0,
K_NEW_GETTIME_TIME_12HOUR = 1,
K_NEW_GETTIME_TIME_24HOUR = 2,
K_NEW_GETTIME_DATE = 3
};
reg_t kGetTime(EngineState *s, int argc, reg_t *argv) {
TimeDate loc_time;
uint32 elapsedTime;
int retval = 0; // Avoid spurious warning
g_system->getTimeAndDate(loc_time);
elapsedTime = g_system->getMillis() - s->game_start_time;
int mode = (argc > 0) ? argv[0].toUint16() : 0;
if (getSciVersion() <= SCI_VERSION_0_LATE && mode > 1)
warning("kGetTime called in SCI0 with mode %d (expected 0 or 1)", mode);
switch (mode) {
case K_NEW_GETTIME_TICKS :
retval = elapsedTime * 60 / 1000;
debugC(2, kDebugLevelTime, "GetTime(elapsed) returns %d", retval);
break;
case K_NEW_GETTIME_TIME_12HOUR :
retval = ((loc_time.tm_hour % 12) << 12) | (loc_time.tm_min << 6) | (loc_time.tm_sec);
debugC(2, kDebugLevelTime, "GetTime(12h) returns %d", retval);
break;
case K_NEW_GETTIME_TIME_24HOUR :
retval = (loc_time.tm_hour << 11) | (loc_time.tm_min << 5) | (loc_time.tm_sec >> 1);
debugC(2, kDebugLevelTime, "GetTime(24h) returns %d", retval);
break;
case K_NEW_GETTIME_DATE :
retval = loc_time.tm_mday | ((loc_time.tm_mon + 1) << 5) | (((loc_time.tm_year + 1900) & 0x7f) << 9);
debugC(2, kDebugLevelTime, "GetTime(date) returns %d", retval);
break;
default:
warning("Attempt to use unknown GetTime mode %d", mode);
break;
}
return make_reg(0, retval);
}
enum {
K_MEMORY_ALLOCATE_CRITICAL = 1,
K_MEMORY_ALLOCATE_NONCRITICAL = 2,
K_MEMORY_FREE = 3,
K_MEMORY_MEMCPY = 4,
K_MEMORY_PEEK = 5,
K_MEMORY_POKE = 6
};
reg_t kMemory(EngineState *s, int argc, reg_t *argv) {
switch (argv[0].toUint16()) {
case K_MEMORY_ALLOCATE_CRITICAL :
if (!s->_segMan->allocDynmem(argv[1].toUint16(), "kMemory() critical", &s->r_acc)) {
error("Critical heap allocation failed");
}
break;
case K_MEMORY_ALLOCATE_NONCRITICAL :
s->_segMan->allocDynmem(argv[1].toUint16(), "kMemory() non-critical", &s->r_acc);
break;
case K_MEMORY_FREE :
if (s->_segMan->freeDynmem(argv[1])) {
error("Attempt to kMemory::free() non-dynmem pointer %04x:%04x", PRINT_REG(argv[1]));
}
break;
case K_MEMORY_MEMCPY : {
int size = argv[3].toUint16();
s->_segMan->memcpy(argv[1], argv[2], size);
break;
}
case K_MEMORY_PEEK : {
SegmentRef ref = s->_segMan->dereference(argv[1]);
if (!ref.isValid() || ref.maxSize < 2) {
// This occurs in KQ5CD when interacting with certain objects
warning("Attempt to peek invalid memory at %04x:%04x", PRINT_REG(argv[1]));
return s->r_acc;
}
if (ref.isRaw)
return make_reg(0, (int16)READ_LE_UINT16(ref.raw));
else
return *(ref.reg);
break;
}
case K_MEMORY_POKE : {
SegmentRef ref = s->_segMan->dereference(argv[1]);
if (!ref.isValid() || ref.maxSize < 2) {
warning("Attempt to poke invalid memory at %04x:%04x", PRINT_REG(argv[1]));
return s->r_acc;
}
if (ref.isRaw) {
if (argv[2].segment) {
error("Attempt to poke memory reference %04x:%04x to %04x:%04x", PRINT_REG(argv[2]), PRINT_REG(argv[1]));
return s->r_acc;
}
WRITE_LE_UINT16(ref.raw, argv[2].offset);
} else
*(ref.reg) = argv[2];
break;
}
}
return s->r_acc;
}
reg_t kPlatform(EngineState *s, int argc, reg_t *argv) {
if (argc == 1) {
if (argv[0].toUint16() == 4)
if (((SciEngine*)g_engine)->getPlatform() == Common::kPlatformWindows)
return make_reg(0, 2);
else
return make_reg(0, 1);
else if (argv[0].toUint16() == 5)
warning("kPlatform(5)"); // TODO: return 1 based on some variable
else if (argv[0].toUint16() == 6)
warning("kPlatform(6)"); // TODO: return some variable
else if (argv[0].toUint16() == 7 && ((SciEngine*)g_engine)->getPlatform() == Common::kPlatformWindows)
return make_reg(0, 1);
}
return NULL_REG;
}
} // End of namespace Sci
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