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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 <time.h> // FIXME: For struct tm
#include "common/system.h"
#include "sci/sci.h"
#include "sci/engine/intmap.h"
#include "sci/engine/gc.h"
#include "sci/engine/kernel.h"
#include "sci/resource.h"
#include "sci/engine/state.h"
#include "sci/gfx/operations.h"
#include "sci/engine/kernel_types.h"
namespace Sci {
#define SCI_MAPPED_UNKNOWN_KFUNCTIONS_NR 0x75
// kfunct_mappers below doubles for unknown kfunctions
static int sci_max_allowed_unknown_kernel_functions[] = {
0,
0x72, // SCI0
0x7b, // SCI01/EGA
0x7b, // SCI01/VGA
0x7b, // SCI01/VGA ODD
0x7b, // SCI1/EARLY
0x7b, // SCI1/LATE
0x7b, // SCI1.1
#ifdef ENABLE_SCI32
0x0, // SCI32
#endif
};
#define DEFUN(nm, cname, sig) {KF_NEW, nm, cname, sig}
#define NOFUN(nm) {KF_NONE, nm, NULL, NULL}
SciKernelFunction kfunct_mappers[] = {
/*00*/ DEFUN("Load", kLoad, "iii*"),
/*01*/ DEFUN("UnLoad", kUnLoad, "i.*"),
/*02*/ DEFUN("ScriptID", kScriptID, "Ioi*"),
/*03*/ DEFUN("DisposeScript", kDisposeScript, "Oi"), // Work around QfG1 bug
/*04*/ DEFUN("Clone", kClone, "o"),
/*05*/ DEFUN("DisposeClone", kDisposeClone, "o"),
/*06*/ DEFUN("IsObject", kIsObject, "."),
/*07*/ DEFUN("RespondsTo", kRespondsTo, ".i"),
/*08*/ DEFUN("DrawPic", kDrawPic, "i*"),
/*09*/ DEFUN("Show", kShow, "i"),
/*0a*/ DEFUN("PicNotValid", kPicNotValid, "i*"),
/*0b*/ DEFUN("Animate", kAnimate, "LI*"), // More like (li?)?
/*0c*/ DEFUN("SetNowSeen", kSetNowSeen, "oi*"), // The second parameter is ignored
/*0d*/ DEFUN("NumLoops", kNumLoops, "o"),
/*0e*/ DEFUN("NumCels", kNumCels, "o"),
/*0f*/ DEFUN("CelWide", kCelWide, "iOiOi"),
/*10*/ DEFUN("CelHigh", kCelHigh, "iOiOi"),
/*11*/ DEFUN("DrawCel", kDrawCel, "iiiiii*"),
/*12*/ DEFUN("AddToPic", kAddToPic, "Il*"),
/*13*/ DEFUN("NewWindow", kNewWindow, "iiiiZRi*"),
/*14*/ DEFUN("GetPort", kGetPort, ""),
/*15*/ DEFUN("SetPort", kSetPort, "ii*"),
/*16*/ DEFUN("DisposeWindow", kDisposeWindow, "ii*"),
/*17*/ DEFUN("DrawControl", kDrawControl, "o"),
/*18*/ DEFUN("HiliteControl", kHiliteControl, "o"),
/*19*/ DEFUN("EditControl", kEditControl, "ZoZo"),
/*1a*/ DEFUN("TextSize", kTextSize, "rZrii*r*"),
/*1b*/ DEFUN("Display", kDisplay, ".*"),
/*1c*/ DEFUN("GetEvent", kGetEvent, "io"),
/*1d*/ DEFUN("GlobalToLocal", kGlobalToLocal, "o"),
/*1e*/ DEFUN("LocalToGlobal", kLocalToGlobal, "o"),
/*1f*/ DEFUN("MapKeyToDir", kMapKeyToDir, "o"),
/*20*/ DEFUN("DrawMenuBar", kDrawMenuBar, "i"),
/*21*/ DEFUN("MenuSelect", kMenuSelect, "oi*"),
/*22*/ DEFUN("AddMenu", kAddMenu, "rr"),
/*23*/ DEFUN("DrawStatus", kDrawStatus, "Zri*"),
/*24*/ DEFUN("Parse", kParse, "ro"),
/*25*/ DEFUN("Said", kSaid, "Zr"),
/*26*/ DEFUN("SetSynonyms", kSetSynonyms, "o"),
/*27*/ DEFUN("HaveMouse", kHaveMouse, ""),
/*28*/ DEFUN("SetCursor", kSetCursor, "i*"),
// FIXME: The number 0x28 occurs twice :-)
/*28*/ DEFUN("MoveCursor", kMoveCursor, "ii*"),
/*29*/ DEFUN("FOpen", kFOpen, "ri"),
/*2a*/ DEFUN("FPuts", kFPuts, "ir"),
/*2b*/ DEFUN("FGets", kFGets, "rii"),
/*2c*/ DEFUN("FClose", kFClose, "i"),
/*2d*/ DEFUN("SaveGame", kSaveGame, "rirr*"),
/*2e*/ DEFUN("RestoreGame", kRestoreGame, "rir*"),
/*2f*/ DEFUN("RestartGame", kRestartGame, ""),
/*30*/ DEFUN("GameIsRestarting", kGameIsRestarting, "i*"),
/*31*/ DEFUN("DoSound", kDoSound, "iIo*"),
/*32*/ DEFUN("NewList", kNewList, ""),
/*33*/ DEFUN("DisposeList", kDisposeList, "l"),
/*34*/ DEFUN("NewNode", kNewNode, ".."),
/*35*/ DEFUN("FirstNode", kFirstNode, "Zl"),
/*36*/ DEFUN("LastNode", kLastNode, "l"),
/*37*/ DEFUN("EmptyList", kEmptyList, "l"),
/*38*/ DEFUN("NextNode", kNextNode, "n!"),
/*39*/ DEFUN("PrevNode", kPrevNode, "n"),
/*3a*/ DEFUN("NodeValue", kNodeValue, "Zn!"),
/*3b*/ DEFUN("AddAfter", kAddAfter, "lnn"),
/*3c*/ DEFUN("AddToFront", kAddToFront, "ln"),
/*3d*/ DEFUN("AddToEnd", kAddToEnd, "ln"),
/*3e*/ DEFUN("FindKey", kFindKey, "l."),
/*3f*/ DEFUN("DeleteKey", kDeleteKey, "l."),
/*40*/ DEFUN("Random", kRandom, "i*"),
/*41*/ DEFUN("Abs", kAbs, "Oi"),
/*42*/ DEFUN("Sqrt", kSqrt, "i"),
/*43*/ DEFUN("GetAngle", kGetAngle, "iiii"),
/*44*/ DEFUN("GetDistance", kGetDistance, "iiiii*"),
/*45*/ DEFUN("Wait", kWait, "i"),
/*46*/ DEFUN("GetTime", kGetTime, "i*"),
/*47*/ DEFUN("StrEnd", kStrEnd, "r"),
/*48*/ DEFUN("StrCat", kStrCat, "rr"),
/*49*/ DEFUN("StrCmp", kStrCmp, "rri*"),
/*4a*/ DEFUN("StrLen", kStrLen, "r"),
/*4b*/ DEFUN("StrCpy", kStrCpy, "rri*"),
/*4c*/ DEFUN("Format", kFormat, "r.*"),
/*4d*/ DEFUN("GetFarText", kGetFarText, "iir"),
/*4e*/ DEFUN("ReadNumber", kReadNumber, "r"),
/*4f*/ DEFUN("BaseSetter", kBaseSetter, "o"),
/*50*/ DEFUN("DirLoop", kDirLoop, "oi"),
// Opcode 51 is defined twice for a reason. Older SCI versions
// call CanBeHere, whereas newer ones its inverse, CantBeHere
/*51*/ DEFUN("CanBeHere", kCanBeHere, "ol*"),
/*51*/ DEFUN("CantBeHere", kCanBeHere, "ol*"),
/*52*/ DEFUN("OnControl", kOnControl, "i*"),
/*53*/ DEFUN("InitBresen", kInitBresen, "oi*"),
/*54*/ DEFUN("DoBresen", kDoBresen, "o"),
/*55*/ DEFUN("DoAvoider", kDoAvoider, "o"),
/*56*/ DEFUN("SetJump", kSetJump, "oiii"),
/*57*/ DEFUN("SetDebug", kSetDebug, "i*"),
/*58*/ NOFUN("InspectObj"),
/*59*/ NOFUN("ShowSends"),
/*5a*/ NOFUN("ShowObjs"),
/*5b*/ NOFUN("ShowFree"),
/*5c*/ DEFUN("MemoryInfo", kMemoryInfo, "i"),
/*5d*/ NOFUN("StackUsage"),
/*5e*/ NOFUN("Profiler"),
/*5f*/ DEFUN("GetMenu", kGetMenu, "i."),
/*60*/ DEFUN("SetMenu", kSetMenu, "i.*"),
/*61*/ DEFUN("GetSaveFiles", kGetSaveFiles, "rrr"),
/*62*/ DEFUN("GetCWD", kGetCWD, "r"),
/*63*/ DEFUN("CheckFreeSpace", kCheckFreeSpace, "r"),
/*64*/ DEFUN("ValidPath", kValidPath, "r"),
/*65*/ DEFUN("CoordPri", kCoordPri, "i"),
/*66*/ DEFUN("StrAt", kStrAt, "rii*"),
/*67*/ DEFUN("DeviceInfo", kDeviceInfo, "i.*"),
/*68*/ DEFUN("GetSaveDir", kGetSaveDir, ""),
/*69*/ DEFUN("CheckSaveGame", kCheckSaveGame, ".*"),
/*6a*/ DEFUN("ShakeScreen", kShakeScreen, "ii*"),
/*6b*/ DEFUN("FlushResources", kFlushResources, "i"),
/*6c*/ DEFUN("TimesSin", kTimesSin, "ii"),
/*6d*/ DEFUN("TimesCos", kTimesCos, "ii"),
/*6e*/ DEFUN("6e", kTimesSin, "ii"),
/*6f*/ DEFUN("6f", kTimesCos, "ii"),
/*70*/ DEFUN("Graph", kGraph, ".*"),
/*71*/ DEFUN("Joystick", kJoystick, ".*"),
/*72*/ NOFUN(NULL),
/*73*/ NOFUN(NULL),
// Experimental functions
/*74*/ DEFUN("FileIO", kFileIO, "i.*"),
/*(?)*/ DEFUN("Memory", kMemory, "i.*"),
/*(?)*/ DEFUN("Sort", kSort, "ooo"),
/*(?)*/ DEFUN("AvoidPath", kAvoidPath, "ii.*"),
/*(?)*/ DEFUN("Lock", kLock, "iii*"),
/*(?)*/ DEFUN("Palette", kPalette, "i.*"),
/*(?)*/ DEFUN("IsItSkip", kIsItSkip, "iiiii"),
// Non-experimental Functions without a fixed ID
DEFUN("CosMult", kTimesCos, "ii"),
DEFUN("SinMult", kTimesSin, "ii"),
/*(?)*/ DEFUN("CosDiv", kCosDiv, "ii"),
/*(?)*/ DEFUN("PriCoord", kPriCoord, "i"),
/*(?)*/ DEFUN("SinDiv", kSinDiv, "ii"),
/*(?)*/ DEFUN("TimesCot", kTimesCot, "ii"),
/*(?)*/ DEFUN("TimesTan", kTimesTan, "ii"),
DEFUN("Message", kMessage, ".*"),
DEFUN("DoAudio", kDoAudio, ".*"),
DEFUN("DoSync", kDoSync, ".*"),
// Special and NOP stuff
{KF_NEW, NULL, k_Unknown, NULL},
{KF_TERMINATOR, NULL, NULL, NULL} // Terminator
};
static const char *argtype_description[] = { "Undetermined (WTF?)", "List", "Node", "Object", "Reference", "Arithmetic" };
int kernel_oops(EngineState *s, const char *file, int line, const char *reason) {
sciprintf("Kernel Oops in file %s, line %d: %s\n", file, line, reason);
fprintf(stderr, "Kernel Oops in file %s, line %d: %s\n", file, line, reason);
script_debug_flag = script_error_flag = 1;
return 0;
}
// Allocates a set amount of memory for a specified use and returns a handle to it.
reg_t kalloc(EngineState *s, const char *type, int space) {
reg_t reg;
s->seg_manager->alloc_hunk_entry(type, space, ®);
SCIkdebug(SCIkMEM, "Allocated %d at hunk "PREG" (%s)\n", space, PRINT_REG(reg), type);
return reg;
}
bool has_kernel_function(EngineState *s, const char *kname) {
Common::StringList::const_iterator it
= Common::find(s->_kernelNames.begin(), s->_kernelNames.end(), kname);
return (it != s->_kernelNames.end());
}
// Returns a pointer to the memory indicated by the specified handle
byte *kmem(EngineState *s, reg_t handle) {
HunkTable *ht = (HunkTable *)GET_SEGMENT(*s->seg_manager, handle.segment, MEM_OBJ_HUNK);
if (!ht || !ENTRY_IS_VALID(ht, handle.offset)) {
error("Error: kmem() with invalid handle\n");
return NULL;
}
return (byte *)ht->_table[handle.offset].mem;
}
// Frees the specified handle. Returns 0 on success, 1 otherwise.
int kfree(EngineState *s, reg_t handle) {
s->seg_manager->free_hunk_entry(handle);
return 0;
}
char *old_save_dir;
reg_t kRestartGame(EngineState *s, int funct_nr, int argc, reg_t *argv) {
char *deref_save_dir = (char*)kernel_dereference_bulk_pointer(s, s->save_dir_copy, 1);
old_save_dir = strdup(deref_save_dir);
s->restarting_flags |= SCI_GAME_IS_RESTARTING_NOW;
s->restarting_flags &= ~SCI_GAME_WAS_RESTARTED_AT_LEAST_ONCE; // This appears to help
s->execution_stack_pos = s->execution_stack_base;
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) {
char *deref_save_dir = (char*)kernel_dereference_bulk_pointer(s, s->save_dir_copy, 1);
if (old_save_dir && deref_save_dir) {
strcpy(deref_save_dir, old_save_dir);
free(old_save_dir);
old_save_dir = NULL;
}
s->r_acc = make_reg(0, (s->restarting_flags & SCI_GAME_WAS_RESTARTED));
if (argc) { // Only happens during replay
if (!UKPV(0)) // 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);
}
reg_t kMemoryInfo(EngineState *s, int funct_nr, int argc, reg_t *argv) {
switch (argv[0].offset) {
case 0: // Total free heap memory
case 1: // Largest heap block available
case 2: // Largest available hunk memory block
case 3: // Total amount of hunk memory
case 4: // Amount of free DOS paragraphs- SCI01
return make_reg(0, 0x7fff); // Must not be 0xffff, or some memory calculations will overflow
default:
warning("Unknown MemoryInfo operation: %04x", argv[0].offset);
}
return NULL_REG;
}
reg_t k_Unknown(EngineState *s, int funct_nr, int argc, reg_t *argv) {
if (funct_nr >= SCI_MAPPED_UNKNOWN_KFUNCTIONS_NR) {
warning("Unhandled Unknown function %04x", funct_nr);
return NULL_REG;
} else {
switch (kfunct_mappers[funct_nr].type) {
case KF_NEW:
return kfunct_mappers[funct_nr].fun(s, funct_nr, argc, argv);
case KF_NONE:
default:
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", UKPV(0));
return s->r_acc;
}
reg_t kSetDebug(EngineState *s, int funct_nr, int argc, reg_t *argv) {
sciprintf("Debug mode activated\n");
script_debug_flag = 1; // Enter debug mode
_debug_seeking = _debug_step_running = 0;
return s->r_acc;
}
#define _K_NEW_GETTIME_TICKS 0
#define _K_NEW_GETTIME_TIME_12HOUR 1
#define _K_NEW_GETTIME_TIME_24HOUR 2
#define _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 (argc && s->flags & GF_SCI0_OLDGETTIME) { // Use old semantics
retval = loc_time.tm_sec + loc_time.tm_min * 60 + (loc_time.tm_hour % 12) * 3600;
debugC(2, kDebugLevelTime, "GetTime(timeofday) returns %d", retval);
return make_reg(0, retval);
}
int mode = UKPV_OR_ALT(0, 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 :
loc_time.tm_hour %= 12;
retval = (loc_time.tm_min << 6) | (loc_time.tm_hour << 12) | (loc_time.tm_sec);
debugC(2, kDebugLevelTime, "GetTime(12h) returns %d", retval);
break;
case _K_NEW_GETTIME_TIME_24HOUR :
retval = (loc_time.tm_min << 5) | (loc_time.tm_sec >> 1) | (loc_time.tm_hour << 11);
debugC(2, kDebugLevelTime, "GetTime(24h) returns %d", retval);
break;
case _K_NEW_GETTIME_DATE :
retval = ((loc_time.tm_mon + 1) << 5) | loc_time.tm_mday | (((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);
}
#define K_MEMORY_ALLOCATE_CRITICAL 1
#define K_MEMORY_ALLOCATE_NONCRITICAL 2
#define K_MEMORY_FREE 3
#define K_MEMORY_MEMCPY 4
#define K_MEMORY_PEEK 5
#define K_MEMORY_POKE 6
reg_t kMemory(EngineState *s, int funct_nr, int argc, reg_t *argv) {
switch (UKPV(0)) {
case K_MEMORY_ALLOCATE_CRITICAL :
if (!s->seg_manager->allocDynmem(UKPV(1), "kMemory() critical", &s->r_acc)) {
error("Critical heap allocation failed\n");
script_error_flag = script_debug_flag = 1;
}
return s->r_acc;
break;
case K_MEMORY_ALLOCATE_NONCRITICAL :
s->seg_manager->allocDynmem(UKPV(1), "kMemory() non-critical", &s->r_acc);
break;
case K_MEMORY_FREE :
if (s->seg_manager->freeDynmem(argv[1])) {
error("Attempt to kMemory::free() non-dynmem pointer "PREG"!\n", PRINT_REG(argv[1]));
}
break;
case K_MEMORY_MEMCPY : {
int size = UKPV(3);
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 ("PREG") invalid/memory region too small", PRINT_REG(argv[1]));
}
if (!src) {
warning(" src ptr ("PREG") 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) {
error("Attempt to poke invalid memory at "PREG"!\n", PRINT_REG(argv[1]));
return s->r_acc;
}
if (s->seg_manager->_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) {
error("Attempt to poke invalid memory at "PREG"!\n", PRINT_REG(argv[1]));
return s->r_acc;
}
if (s->seg_manager->_heap[argv[1].segment]->getType() == MEM_OBJ_LOCALS)
*((reg_t *) ref) = argv[2];
else {
if (argv[2].segment) {
error("Attempt to poke memory reference "PREG" to "PREG"!\n", 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) {
int i;
sciprintf("Unimplemented syscall: %s[%x](", s->_kernelNames[funct_nr].c_str(), funct_nr);
for (i = 0; i < argc; i++) {
sciprintf(PREG, PRINT_REG(argv[i]));
if (i + 1 < argc) sciprintf(", ");
}
sciprintf(")\n");
return NULL_REG;
}
reg_t kNOP(EngineState *s, int funct_nr, int argc, reg_t *argv) {
warning("Kernel function 0x%02x invoked: unmapped", funct_nr);
if (s->_kfuncTable[funct_nr].orig_name != SCRIPT_UNKNOWN_FUNCTION_STRING) {
warning(" (but its name is known to be %s)", s->_kfuncTable[funct_nr].orig_name.c_str());
}
return NULL_REG;
}
void kernel_compile_signature(const char **s) {
const char *src = *s;
char *result;
int ellipsis = 0;
char v;
int index = 0;
if (!src)
return; // NULL signature: Nothing to do
result = (char*)malloc(strlen(*s) + 1);
while (*src) {
char c;
v = 0;
if (ellipsis) {
error("Failed compiling kernel function signature '%s': non-terminal ellipsis '%c'\n", *s, *src);
}
do {
char cc;
cc = c = *src++;
if (c >= 'A' || c <= 'Z')
cc = c | KSIG_SPEC_SUM_DONE;
switch (cc) {
case KSIG_SPEC_LIST:
v |= KSIG_LIST;
break;
case KSIG_SPEC_NODE:
v |= KSIG_NODE;
break;
case KSIG_SPEC_REF:
v |= KSIG_REF;
break;
case KSIG_SPEC_OBJECT:
v |= KSIG_OBJECT;
break;
case KSIG_SPEC_ARITHMETIC:
v |= KSIG_ARITHMETIC;
break;
case KSIG_SPEC_NULL:
v |= KSIG_NULL;
break;
case KSIG_SPEC_ANY:
v |= KSIG_ANY;
break;
case KSIG_SPEC_ALLOW_INV:
v |= KSIG_ALLOW_INV;
break;
case KSIG_SPEC_ELLIPSIS:
v |= KSIG_ELLIPSIS;
ellipsis = 1;
break;
default: {
error("INTERNAL ERROR when compiling kernel function signature '%s': (%02x) not understood (aka"
" '%c')\n", *s, c, c);
}
}
} while (*src && (*src == KSIG_SPEC_ALLOW_INV || *src == KSIG_SPEC_ELLIPSIS || (c < 'a' && c != KSIG_SPEC_ANY)));
// To handle sum types
result[index++] = v;
}
result[index] = 0;
*s = result; // Write back
}
int script_map_kernel(EngineState *s) {
int mapped = 0;
int ignored = 0;
uint functions_nr = s->_kernelNames.size();
uint max_functions_nr = sci_max_allowed_unknown_kernel_functions[s->resmgr->_sciVersion];
if (functions_nr < max_functions_nr) {
warning("SCI version believed to have %d kernel"
" functions, but only %d reported-- filling up remaining %d",
max_functions_nr, functions_nr, max_functions_nr - functions_nr);
functions_nr = max_functions_nr;
}
s->_kfuncTable.resize(functions_nr);
for (uint functnr = 0; functnr < functions_nr; functnr++) {
int seeker, found = -1;
Common::String sought_name;
if (functnr < s->_kernelNames.size())
sought_name = s->_kernelNames[functnr];
if (!sought_name.empty())
for (seeker = 0; (found == -1) && kfunct_mappers[seeker].type != KF_TERMINATOR; seeker++)
if (kfunct_mappers[seeker].name && sought_name == kfunct_mappers[seeker].name)
found = seeker; // Found a kernel function with the same name!
if (found == -1) {
if (!sought_name.empty()) {
warning("Kernel function %s[%x] unmapped", s->_kernelNames[functnr].c_str(), functnr);
s->_kfuncTable[functnr].fun = kNOP;
} else {
warning("Flagging kernel function %x as unknown", functnr);
s->_kfuncTable[functnr].fun = k_Unknown;
}
s->_kfuncTable[functnr].signature = NULL;
s->_kfuncTable[functnr].orig_name = sought_name;
} else
switch (kfunct_mappers[found].type) {
case KF_NONE:
s->_kfuncTable[functnr].signature = NULL;
++ignored;
break;
case KF_NEW:
s->_kfuncTable[functnr].fun = kfunct_mappers[found].fun;
s->_kfuncTable[functnr].signature = kfunct_mappers[found].signature;
s->_kfuncTable[functnr].orig_name.clear();
kernel_compile_signature(&(s->_kfuncTable[functnr].signature));
++mapped;
break;
}
} // for all functions requesting to be mapped
sciprintf("Handled %d/%d kernel functions, mapping %d", mapped + ignored, s->_kernelNames.size(), mapped);
if (ignored)
sciprintf(" and ignoring %d", ignored);
sciprintf(".\n");
return 0;
}
int determine_reg_type(EngineState *s, reg_t reg, int allow_invalid) {
MemObject *mobj;
if (!reg.segment) {
if (!reg.offset)
return KSIG_ARITHMETIC | KSIG_NULL;
return KSIG_ARITHMETIC;
}
if ((reg.segment >= s->seg_manager->_heap.size()) || !s->seg_manager->_heap[reg.segment])
return 0; // Invalid
mobj = s->seg_manager->_heap[reg.segment];
switch (mobj->getType()) {
case MEM_OBJ_SCRIPT:
if (reg.offset <= (*(Script *)mobj).buf_size && reg.offset >= -SCRIPT_OBJECT_MAGIC_OFFSET
&& RAW_IS_OBJECT((*(Script *)mobj).buf + reg.offset)) {
int idx = RAW_GET_CLASS_INDEX((Script *)mobj, reg);
if (idx >= 0 && (uint)idx < (*(Script *)mobj)._objects.size())
return KSIG_OBJECT;
else
return KSIG_REF;
} else
return KSIG_REF;
case MEM_OBJ_CLONES:
if (allow_invalid || ENTRY_IS_VALID((CloneTable *)mobj, reg.offset))
return KSIG_OBJECT;
else
return KSIG_OBJECT | KSIG_INVALID;
case MEM_OBJ_LOCALS:
if (allow_invalid || reg.offset < (*(LocalVariables *)mobj)._locals.size() * sizeof(reg_t))
return KSIG_REF;
else
return KSIG_REF | KSIG_INVALID;
case MEM_OBJ_STACK:
if (allow_invalid || reg.offset < (*(DataStack *)mobj).nr * sizeof(reg_t))
return KSIG_REF;
else
return KSIG_REF | KSIG_INVALID;
case MEM_OBJ_SYS_STRINGS:
if (allow_invalid || (reg.offset < SYS_STRINGS_MAX
&& (*(SystemStrings *)mobj).strings[reg.offset].name))
return KSIG_REF;
else
return KSIG_REF | KSIG_INVALID;
case MEM_OBJ_LISTS:
if (allow_invalid || ENTRY_IS_VALID((ListTable *)mobj, reg.offset))
return KSIG_LIST;
else
return KSIG_LIST | KSIG_INVALID;
case MEM_OBJ_NODES:
if (allow_invalid || ENTRY_IS_VALID((NodeTable *)mobj, reg.offset))
return KSIG_NODE;
else
return KSIG_NODE | KSIG_INVALID;
case MEM_OBJ_DYNMEM:
if (allow_invalid || reg.offset < (*(DynMem *)mobj)._size)
return KSIG_REF;
else
return KSIG_REF | KSIG_INVALID;
default:
return 0;
}
}
const char *kernel_argtype_description(int type) {
type &= ~KSIG_INVALID;
return argtype_description[sci_ffs(type)];
}
int kernel_matches_signature(EngineState *s, const char *sig, int argc, reg_t *argv) {
if (!sig)
return 1;
while (*sig && argc) {
if ((*sig & KSIG_ANY) != KSIG_ANY) {
int type = determine_reg_type(s, *argv, *sig & KSIG_ALLOW_INV);
if (!type) {
sciprintf("[KERN] Could not determine type of ref "PREG"; failing signature check\n", PRINT_REG(*argv));
return 0;
}
if (type & KSIG_INVALID) {
sciprintf("[KERN] ref "PREG" was determined to be a %s, but the reference itself is invalid\n",
PRINT_REG(*argv), kernel_argtype_description(type));
return 0;
}
if (!(type & *sig))
return 0;
}
if (!(*sig & KSIG_ELLIPSIS))
++sig;
++argv;
--argc;
}
if (argc)
return 0; // Too many arguments
else
return (*sig == 0 || (*sig & KSIG_ELLIPSIS));
}
static void *_kernel_dereference_pointer(EngineState *s, reg_t pointer, int entries, int align) {
int maxsize;
void *retval = s->seg_manager->dereference(pointer, &maxsize);
if (pointer.offset & (align - 1)) {
error("Unaligned pointer read: "PREG" expected with %d alignment!\n", PRINT_REG(pointer), align);
return NULL;
}
if (entries > maxsize) {
error("Trying to dereference pointer "PREG" beyond end of segment!\n", PRINT_REG(pointer));
return NULL;
}
return retval;
}
byte *kernel_dereference_bulk_pointer(EngineState *s, reg_t pointer, int entries) {
return (byte*)_kernel_dereference_pointer(s, pointer, entries, 1);
}
reg_t *kernel_dereference_reg_pointer(EngineState *s, reg_t pointer, int entries) {
return (reg_t*)_kernel_dereference_pointer(s, pointer, entries, sizeof(reg_t));
}
} // End of namespace Sci
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