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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 <time.h> // FIXME: For struct tm
#include "sci/sci.h"
#include "sci/debug.h"
#include "sci/engine/state.h"
#include "sci/engine/kernel.h"
#include "sci/engine/gc.h"
namespace Sci {
reg_t kRestartGame(EngineState *s, int funct_nr, 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 funct_nr, 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 funct_nr, int argc, reg_t *argv) {
return make_reg(0, -1);
}
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 funct_nr, int argc, reg_t *argv) {
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;
}
#define SCI_MAPPED_UNKNOWN_KFUNCTIONS_NR 0x75
// kfunct_mappers below doubles for unknown kfunctions
reg_t k_Unknown(EngineState *s, int funct_nr, int argc, reg_t *argv) {
warning("Unhandled Unknown function %04x", funct_nr);
return NULL_REG;
}
reg_t kFlushResources(EngineState *s, int funct_nr, 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 funct_nr, int argc, reg_t *argv) {
printf("Debug mode activated\n");
scriptState.seeking = kDebugSeekNothing;
scriptState.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 funct_nr, int argc, reg_t *argv) {
tm loc_time;
uint32 start_time;
int retval = 0; // Avoid spurious warning
#if 0
// Reset optimization flags: If this function is called,
// the game may be waiting for a timeout
s->kernel_opt_flags &= ~(KERNEL_OPT_FLAG_GOT_EVENT | KERNEL_OPT_FLAG_GOT_2NDEVENT);
#endif
g_system->getTimeAndDate(loc_time);
start_time = g_system->getMillis() - s->game_start_time;
if ((s->_flags & GF_SCI0_OLDGETTIME) && argc) { // Use old semantics
retval = (loc_time.tm_hour % 12) * 3600 + loc_time.tm_min * 60 + loc_time.tm_sec;
debugC(2, kDebugLevelTime, "GetTime(timeofday) returns %d", retval);
return make_reg(0, retval);
}
int mode = (argc > 0) ? argv[0].toUint16() : 0;
switch (mode) {
case _K_NEW_GETTIME_TICKS :
retval = start_time * 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 funct_nr, int argc, reg_t *argv) {
switch (argv[0].toUint16()) {
case K_MEMORY_ALLOCATE_CRITICAL :
if (!s->segmentManager->allocDynmem(argv[1].toUint16(), "kMemory() critical", &s->r_acc)) {
error("Critical heap allocation failed");
}
return s->r_acc;
break;
case K_MEMORY_ALLOCATE_NONCRITICAL :
s->segmentManager->allocDynmem(argv[1].toUint16(), "kMemory() non-critical", &s->r_acc);
break;
case K_MEMORY_FREE :
if (s->segmentManager->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();
byte *dest = kernel_dereference_bulk_pointer(s, argv[1], size);
byte *src = kernel_dereference_bulk_pointer(s, argv[2], size);
if (dest && src)
memcpy(dest, src, size);
else {
warning("Could not execute kMemory:memcpy of %d bytes:", size);
if (!dest) {
warning(" dest ptr (%04x:%04x) invalid/memory region too small", PRINT_REG(argv[1]));
}
if (!src) {
warning(" src ptr (%04x:%04x) invalid/memory region too small", PRINT_REG(argv[2]));
}
}
break;
}
case K_MEMORY_PEEK : {
byte *ref = kernel_dereference_bulk_pointer(s, argv[1], 2);
if (!ref) {
// 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 (s->segmentManager->_heap[argv[1].segment]->getType() == MEM_OBJ_LOCALS)
return *((reg_t *) ref);
else
return make_reg(0, (int16)READ_LE_UINT16(ref));
break;
}
case K_MEMORY_POKE : {
byte *ref = kernel_dereference_bulk_pointer(s, argv[1], 2);
if (!ref) {
warning("Attempt to poke invalid memory at %04x:%04x", PRINT_REG(argv[1]));
return s->r_acc;
}
if (s->segmentManager->_heap[argv[1].segment]->getType() == MEM_OBJ_LOCALS)
*((reg_t *) ref) = argv[2];
else {
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, argv[2].offset); // ?
}
}
return s->r_acc;
break;
}
}
return s->r_acc;
}
reg_t kStub(EngineState *s, int funct_nr, int argc, reg_t *argv) {
char tmpbuf[200];
sprintf(tmpbuf, "Unimplemented syscall: %s[%x] (",
((SciEngine*)g_engine)->getKernel()->getKernelName(funct_nr).c_str(), funct_nr);
for (int i = 0; i < argc; i++) {
char tmpbuf2[20];
sprintf(tmpbuf2, "%04x:%04x", PRINT_REG(argv[i]));
if (i + 1 < argc)
strcat(tmpbuf2, ", ");
strcat(tmpbuf, tmpbuf2);
}
strcat(tmpbuf, ")");
warning("%s", tmpbuf);
return NULL_REG;
}
reg_t kNOP(EngineState *s, int funct_nr, int argc, reg_t *argv) {
warning("Kernel function 0x%02x (%s) invoked: unmapped", funct_nr, ((SciEngine*)g_engine)->getKernel()->_kernelFuncs[funct_nr].orig_name.c_str());
return NULL_REG;
}
} // End of namespace Sci
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