Mercurial > vba-linux

     1 #include <cstdio>

     2 #include <cstdlib>

     3 #include <malloc.h>

     4 #include <string>

     5 #include <cassert>

     6 #include <cctype>

     7 #include <cmath>

     8 #include <ctime>

     9 

    10 #include <vector>

    11 #include <map>

    12 #include <string>

    13 #include <algorithm>

    14 

    15 using namespace std;

    16 

    17 #ifdef __linux

    18 #include <unistd.h> // for unlink

    19 #include <sys/types.h>

    20 #include <sys/wait.h>

    21 #endif

    22 #if (defined(WIN32) && !defined(SDL))

    23 #include <direct.h>

    24 #include "../win32/stdafx.h"

    25 #include "../win32/Input.h"

    26 #include "../win32/MainWnd.h"

    27 #include "../win32/VBA.h"

    28 #include "../win32/LuaOpenDialog.h"

    29 #else

    30 #define stricmp strcasecmp

    31 #define strnicmp strncasecmp

    32 #endif

    33 

    34 #include "../Port.h"

    35 #include "System.h"

    36 #include "movie.h"

    37 #include "../gba/GBA.h"

    38 #include "../gba/GBAGlobals.h"

    39 #include "../gb/GB.h"

    40 #include "../gb/gbGlobals.h"

    41 #include "../gba/GBASound.h"

    42 

    43 #ifdef _WIN32

    44 #include "../win32/Sound.h"

    45 //#include "../win32/WinMiscUtil.h"

    46 extern CString winGetSavestateFilename(const CString &LogicalRomName, int nID);

    47 #else

    48 #endif

    49 

    50 extern "C"

    51 {

    52 #include "../lua/lua.h"

    53 #include "../lua/lauxlib.h"

    54 #include "../lua/lualib.h"

    55 #include "../lua/lstate.h"

    56 }

    57 #include "vbalua.h"

    58 

    59 #include "../SFMT/SFMT.c"

    60 

    61 static void (*info_print)(int uid, const char *str);

    62 static void (*info_onstart)(int uid);

    63 static void (*info_onstop)(int uid);

    64 static int	info_uid;

    65 

    66 #ifndef countof

    67 #define countof(a)  (sizeof(a) / sizeof(a[0]))

    68 #endif

    69 

    70 static lua_State *LUA;

    71 

    72 // Are we running any code right now?

    73 static char *luaScriptName = NULL;

    74 

    75 // Are we running any code right now?

    76 static bool8 luaRunning = false;

    77 

    78 // True at the frame boundary, false otherwise.

    79 static bool8 frameBoundary = false;

    80 

    81 // The execution speed we're running at.

    82 static enum { SPEED_NORMAL, SPEED_NOTHROTTLE, SPEED_TURBO, SPEED_MAXIMUM } speedmode = SPEED_NORMAL;

    83 

    84 // Rerecord count skip mode

    85 static bool8 skipRerecords = false;

    86 

    87 // Used by the registry to find our functions

    88 static const char *frameAdvanceThread = "VBA.FrameAdvance";

    89 static const char *guiCallbackTable	  = "VBA.GUI";

    90 

    91 // True if there's a thread waiting to run after a run of frame-advance.

    92 static bool8 frameAdvanceWaiting = false;

    93 

    94 // We save our pause status in the case of a natural death.

    95 //static bool8 wasPaused = false;

    96 

    97 // Transparency strength. 255=opaque, 0=so transparent it's invisible

    98 static int transparencyModifier = 255;

    99 

   100 // Our joypads.

   101 static uint32 lua_joypads[4];

   102 static uint8  lua_joypads_used = 0;

   103 

   104 static bool8  gui_used = false;

   105 static uint8 *gui_data = NULL;          // BGRA

   106 

   107 // Protects Lua calls from going nuts.

   108 // We set this to a big number like 1000 and decrement it

   109 // over time. The script gets knifed once this reaches zero.

   110 static int numTries;

   111 

   112 // number of registered memory functions (1 per hooked byte)

   113 static unsigned int numMemHooks;

   114 

   115 // Look in inputglobal.h for macros named like BUTTON_MASK_UP to determine the order.

   116 static const char *button_mappings[] = {

   117   "A", "B", "select", "start", "right", "left", "up", "down", "R", "L"

   118 };

   119 

   120 #ifdef _MSC_VER

   121 #define snprintf _snprintf

   122 #define vscprintf _vscprintf

   123 #else

   124 #define stricmp strcasecmp

   125 #define strnicmp strncasecmp

   126 #define __forceinline __attribute__((always_inline))

   127 #endif

   128 

   129 static const char *luaCallIDStrings[] =

   130   {

   131     "CALL_BEFOREEMULATION",

   132     "CALL_AFTEREMULATION",

   133     "CALL_BEFOREEXIT"

   134   };

   135 

   136 //make sure we have the right number of strings

   137 CTASSERT(sizeof(luaCallIDStrings) / sizeof(*luaCallIDStrings) == LUACALL_COUNT)

   138 

   139 static const char *luaMemHookTypeStrings [] =

   140 {

   141   "MEMHOOK_WRITE",

   142   "MEMHOOK_READ",

   143   "MEMHOOK_EXEC",

   144 

   145   "MEMHOOK_WRITE_SUB",

   146   "MEMHOOK_READ_SUB",

   147   "MEMHOOK_EXEC_SUB",

   148 };

   149 

   150 //make sure we have the right number of strings

   151 CTASSERT(sizeof(luaMemHookTypeStrings) / sizeof(*luaMemHookTypeStrings) ==  LUAMEMHOOK_COUNT)

   152 

   153 static char *rawToCString(lua_State * L, int idx = 0);

   154 static const char *toCString(lua_State *L, int idx = 0);

   155 

   156 // GBA memory I/O functions copied from win32/MemoryViewerDlg.cpp

   157 static inline u8 CPUReadByteQuick(u32 addr)

   158 {

   159   return ::map[addr >> 24].address[addr & ::map[addr >> 24].mask];

   160 }

   161 

   162 static inline void CPUWriteByteQuick(u32 addr, u8 b)

   163 {

   164   ::map[addr >> 24].address[addr & ::map[addr >> 24].mask] = b;

   165 }

   166 

   167 static inline u16 CPUReadHalfWordQuick(u32 addr)

   168 {

   169   return *((u16 *) &::map[addr >> 24].address[addr & ::map[addr >> 24].mask]);

   170 }

   171 

   172 static inline void CPUWriteHalfWordQuick(u32 addr, u16 b)

   173 {

   174   *((u16 *) &::map[addr >> 24].address[addr & ::map[addr >> 24].mask]) = b;

   175 }

   176 

   177 static inline u32 CPUReadMemoryQuick(u32 addr)

   178 {

   179   return *((u32 *) &::map[addr >> 24].address[addr & ::map[addr >> 24].mask]);

   180 }

   181 

   182 static inline void CPUWriteMemoryQuick(u32 addr, u32 b)

   183 {

   184   *((u32 *) &::map[addr >> 24].address[addr & ::map[addr >> 24].mask]) = b;

   185 }

   186 

   187 // GB

   188 static inline u8 gbReadMemoryQuick8(u16 addr)

   189 {

   190   return gbReadMemoryQuick(addr);

   191 }

   192 

   193 static inline void gbWriteMemoryQuick8(u16 addr, u8 b)

   194 {

   195   gbWriteMemoryQuick(addr, b);

   196 }

   197 

   198 static inline u16 gbReadMemoryQuick16(u16 addr)

   199 {

   200   return (gbReadMemoryQuick(addr + 1) << 8) | gbReadMemoryQuick(addr);

   201 }

   202 

   203 static inline void gbWriteMemoryQuick16(u16 addr, u16 b)

   204 {

   205   gbWriteMemoryQuick(addr, b & 0xff);

   206   gbWriteMemoryQuick(addr + 1, (b >> 8) & 0xff);

   207 }

   208 

   209 static inline u32 gbReadMemoryQuick32(u16 addr)

   210 {

   211   return (gbReadMemoryQuick(addr + 3) << 24) |

   212     (gbReadMemoryQuick(addr + 2) << 16) |

   213     (gbReadMemoryQuick(addr + 1) << 8) |

   214     gbReadMemoryQuick(addr);

   215 }

   216 

   217 static inline void gbWriteMemoryQuick32(u16 addr, u32 b)

   218 {

   219   gbWriteMemoryQuick(addr, b & 0xff);

   220   gbWriteMemoryQuick(addr + 1, (b >> 8) & 0xff);

   221   gbWriteMemoryQuick(addr + 2, (b >> 16) & 0xff);

   222   gbWriteMemoryQuick(addr + 1, (b >> 24) & 0xff);

   223 }

   224 

   225 static inline u8 gbReadROMQuick8(u32 addr)

   226 {

   227   return gbReadROMQuick(addr & gbRomSizeMask);

   228 }

   229 

   230 static inline u8 gbReadROMQuick16(u32 addr)

   231 {

   232   return (gbReadROMQuick(addr+1 & gbRomSizeMask) << 8) | gbReadROMQuick(addr & gbRomSizeMask);

   233 }

   234 

   235 static inline u8 gbReadROMQuick32(u32 addr)

   236 {

   237   return (gbReadROMQuick(addr+3 & gbRomSizeMask) << 24) |

   238     (gbReadROMQuick(addr+2 & gbRomSizeMask) << 16) |

   239     (gbReadROMQuick(addr+1 & gbRomSizeMask) << 8) |

   240     gbReadROMQuick(addr & gbRomSizeMask);

   241 }

   242 

   243 typedef void (*GetColorFunc)(const uint8 *, uint8 *, uint8 *, uint8 *);

   244 typedef void (*SetColorFunc)(uint8 *, uint8, uint8, uint8);

   245 

   246 static void getColor16(const uint8 *s, uint8 *r, uint8 *g, uint8 *b)

   247 {

   248   u16 v = *(const uint16 *)s;

   249   *r = ((v >> systemBlueShift) & 0x001f) << 3;

   250   *g = ((v >> systemGreenShift) & 0x001f) << 3;

   251   *b = ((v >> systemRedShift) & 0x001f) << 3;

   252 }

   253 

   254 static void getColor24(const uint8 *s, uint8 *r, uint8 *g, uint8 *b)

   255 {

   256   if (systemRedShift > systemBlueShift)

   257     *b = s[0], *g = s[1], *r = s[2];

   258   else

   259     *r = s[0], *g = s[1], *b = s[2];

   260 }

   261 

   262 static void getColor32(const uint8 *s, uint8 *r, uint8 *g, uint8 *b)

   263 {

   264   u32 v = *(const uint32 *)s;

   265   *b = ((v >> systemBlueShift) & 0x001f) << 3;

   266   *g = ((v >> systemGreenShift) & 0x001f) << 3;

   267   *r = ((v >> systemRedShift) & 0x001f) << 3;

   268 }

   269 

   270 static void setColor16(uint8 *s, uint8 r, uint8 g, uint8 b)

   271 {

   272   *(uint16 *)s = ((b >> 3) & 0x01f) <<

   273     systemBlueShift |

   274     ((g >> 3) & 0x01f) <<

   275     systemGreenShift |

   276     ((r >> 3) & 0x01f) <<

   277     systemRedShift;

   278 }

   279 

   280 static void setColor24(uint8 *s, uint8 r, uint8 g, uint8 b)

   281 {

   282   if (systemRedShift > systemBlueShift)

   283     s[0] = b, s[1] = g, s[2] = r;

   284   else

   285     s[0] = r, s[1] = g, s[2] = b;

   286 }

   287 

   288 static void setColor32(uint8 *s, uint8 r, uint8 g, uint8 b)

   289 {

   290   *(uint32 *)s = ((b >> 3) & 0x01f) <<

   291     systemBlueShift |

   292     ((g >> 3) & 0x01f) <<

   293     systemGreenShift |

   294     ((r >> 3) & 0x01f) <<

   295     systemRedShift;

   296 }

   297 

   298 static bool getColorIOFunc(int depth, GetColorFunc *getColor, SetColorFunc *setColor)

   299 {

   300   switch (depth)

   301     {

   302     case 16:

   303       if (getColor)

   304 	*getColor = getColor16;

   305       if (setColor)

   306 	*setColor = setColor16;

   307       return true;

   308     case 24:

   309       if (getColor)

   310 	*getColor = getColor24;

   311       if (setColor)

   312 	*setColor = setColor24;

   313       return true;

   314     case 32:

   315       if (getColor)

   316 	*getColor = getColor32;

   317       if (setColor)

   318 	*setColor = setColor32;

   319       return true;

   320     default:

   321       return false;

   322     }

   323 }

   324 

   325 /**

   326  * Resets emulator speed / pause states after script exit.

   327  */

   328 static void VBALuaOnStop(void)

   329 {

   330   luaRunning		 = false;

   331   lua_joypads_used = 0;

   332   gui_used		 = false;

   333   //if (wasPaused)

   334   //	systemSetPause(true);

   335 }

   336 

   337 /**

   338  * Asks Lua if it wants control of the emulator's speed.

   339  * Returns 0 if no, 1 if yes. If yes, we also tamper with the

   340  * IPPU's settings for speed ourselves, so the calling code

   341  * need not do anything.

   342  */

   343 int VBALuaSpeed(void)

   344 {

   345   if (!LUA || !luaRunning)

   346     return 0;

   347 

   348   //printf("%d\n", speedmode);

   349   switch (speedmode)

   350     {

   351       /*

   352 	case SPEED_NORMAL:

   353 	return 0;

   354 	case SPEED_NOTHROTTLE:

   355 	IPPU.RenderThisFrame = true;

   356 	return 1;

   357 

   358 	case SPEED_TURBO:

   359 	IPPU.SkippedFrames++;

   360 	if (IPPU.SkippedFrames >= 40) {

   361 	IPPU.SkippedFrames = 0;

   362 	IPPU.RenderThisFrame = true;

   363 	}

   364 	else

   365 	IPPU.RenderThisFrame = false;

   366 	return 1;

   367 

   368 	// In mode 3, SkippedFrames is set to zero so that the frame

   369 	// skipping code doesn't try anything funny.

   370 	case SPEED_MAXIMUM:

   371 	IPPU.SkippedFrames=0;

   372 	IPPU.RenderThisFrame = false;

   373 	return 1;

   374       */

   375     case 0: // FIXME: to get rid of the warning

   376     default:

   377       assert(false);

   378       return 0;

   379     }

   380 }

   381 

   382 ///////////////////////////

   383 // vba.speedmode(string mode)

   384 //

   385 //   Takes control of the emulation speed

   386 //   of the system. Normal is normal speed (60fps, 50 for PAL),

   387 //   nothrottle disables speed control but renders every frame,

   388 //   turbo renders only a few frames in order to speed up emulation,

   389 

   390 //   maximum renders no frames

   391 static int vba_speedmode(lua_State *L)

   392 {

   393   const char *mode = luaL_checkstring(L, 1);

   394 

   395   if (strcasecmp(mode, "normal") == 0)

   396     {

   397       speedmode = SPEED_NORMAL;

   398     }

   399   else if (strcasecmp(mode, "nothrottle") == 0)

   400     {

   401       speedmode = SPEED_NOTHROTTLE;

   402     }

   403   else if (strcasecmp(mode, "turbo") == 0)

   404     {

   405       speedmode = SPEED_TURBO;

   406     }

   407   else if (strcasecmp(mode, "maximum") == 0)

   408     {

   409       speedmode = SPEED_MAXIMUM;

   410     }

   411   else

   412     luaL_error(L, "Invalid mode %s to vba.speedmode", mode);

   413 

   414   //printf("new speed mode:  %d\n", speedmode);

   415   return 0;

   416 }

   417 

   418 // vba.frameadvnace()

   419 //

   420 //  Executes a frame advance. Occurs by yielding the coroutine, then re-running

   421 

   422 //  when we break out.

   423 static int vba_frameadvance(lua_State *L)

   424 {

   425   // We're going to sleep for a frame-advance. Take notes.

   426   if (frameAdvanceWaiting)

   427     return luaL_error(L, "can't call vba.frameadvance() from here");

   428 

   429   frameAdvanceWaiting = true;

   430 

   431   // Don't do this! The user won't like us sending their emulator out of control!

   432   //	Settings.FrameAdvance = true;

   433   // Now we can yield to the main

   434   return lua_yield(L, 0);

   435 

   436   // It's actually rather disappointing...

   437 }

   438 

   439 // vba.pause()

   440 //

   441 //  Pauses the emulator, function "waits" until the user unpauses.

   442 //  This function MAY be called from a non-frame boundary, but the frame

   443 

   444 //  finishes executing anwyays. In this case, the function returns immediately.

   445 static int vba_pause(lua_State *L)

   446 {

   447   systemSetPause(true);

   448   speedmode = SPEED_NORMAL;

   449 

   450   // Return control if we're midway through a frame. We can't pause here.

   451   if (frameAdvanceWaiting)

   452     {

   453       return 0;

   454     }

   455 

   456   // If it's on a frame boundary, we also yield.

   457   frameAdvanceWaiting = true;

   458   return lua_yield(L, 0);

   459 }

   460 

   461 static int vba_registerbefore(lua_State *L)

   462 {

   463   if (!lua_isnil(L, 1))

   464     luaL_checktype(L, 1, LUA_TFUNCTION);

   465   lua_settop(L, 1);

   466   lua_getfield(L, LUA_REGISTRYINDEX, luaCallIDStrings[LUACALL_BEFOREEMULATION]);

   467   lua_insert(L, 1);

   468   lua_setfield(L, LUA_REGISTRYINDEX, luaCallIDStrings[LUACALL_BEFOREEMULATION]);

   469 

   470   //StopScriptIfFinished(luaStateToUIDMap[L]);

   471   return 1;

   472 }

   473 

   474 static int vba_registerafter(lua_State *L)

   475 {

   476   if (!lua_isnil(L, 1))

   477     luaL_checktype(L, 1, LUA_TFUNCTION);

   478   lua_settop(L, 1);

   479   lua_getfield(L, LUA_REGISTRYINDEX, luaCallIDStrings[LUACALL_AFTEREMULATION]);

   480   lua_insert(L, 1);

   481   lua_setfield(L, LUA_REGISTRYINDEX, luaCallIDStrings[LUACALL_AFTEREMULATION]);

   482 

   483   //StopScriptIfFinished(luaStateToUIDMap[L]);

   484   return 1;

   485 }

   486 

   487 static int vba_registerexit(lua_State *L)

   488 {

   489   if (!lua_isnil(L, 1))

   490     luaL_checktype(L, 1, LUA_TFUNCTION);

   491   lua_settop(L, 1);

   492   lua_getfield(L, LUA_REGISTRYINDEX, luaCallIDStrings[LUACALL_BEFOREEXIT]);

   493   lua_insert(L, 1);

   494   lua_setfield(L, LUA_REGISTRYINDEX, luaCallIDStrings[LUACALL_BEFOREEXIT]);

   495 

   496   //StopScriptIfFinished(luaStateToUIDMap[L]);

   497   return 1;

   498 }

   499 

   500 static inline bool isalphaorunderscore(char c)

   501 {

   502   return isalpha(c) || c == '_';

   503 }

   504 

   505 static std::vector<const void *> s_tableAddressStack; // prevents infinite recursion of a table within a table (when cycle is

   506                                                       // found, print something like table:parent)

   507 static std::vector<const void *> s_metacallStack; // prevents infinite recursion if something's __tostring returns another table

   508                                                   // that contains that something (when cycle is found, print the inner result

   509                                                   // without using __tostring)

   510 

   511 #define APPENDPRINT { int _n = snprintf(ptr, remaining,

   512 #define END ); if (_n >= 0) { ptr += _n; remaining -= _n; } else { remaining = 0; } }

   513 static void toCStringConverter(lua_State *L, int i, char * &ptr, int &remaining)

   514 {

   515   if (remaining <= 0)

   516     return;

   517 

   518   const char *str = ptr; // for debugging

   519 

   520   // if there is a __tostring metamethod then call it

   521   int usedMeta = luaL_callmeta(L, i, "__tostring");

   522   if (usedMeta)

   523     {

   524       std::vector<const void *>::const_iterator foundCycleIter = std::find(s_metacallStack.begin(), s_metacallStack.end(), lua_topointer(L, i));

   525       if (foundCycleIter != s_metacallStack.end())

   526         {

   527 	  lua_pop(L, 1);

   528 	  usedMeta = false;

   529 	}

   530       else

   531         {

   532 	  s_metacallStack.push_back(lua_topointer(L, i));

   533 	  i = lua_gettop(L);

   534 	}

   535     }

   536 

   537   switch (lua_type(L, i))

   538     {

   539     case LUA_TNONE:

   540       break;

   541     case LUA_TNIL:

   542       APPENDPRINT "nil" END break;

   543     case LUA_TBOOLEAN:

   544       APPENDPRINT lua_toboolean(L, i) ? "true" : "false" END break;

   545     case LUA_TSTRING : APPENDPRINT "%s", lua_tostring(L, i) END break;

   546     case LUA_TNUMBER:

   547       APPENDPRINT "%.12Lg", lua_tonumber(L, i) END break;

   548     case LUA_TFUNCTION:

   549       if ((L->base + i - 1)->value.gc->cl.c.isC)

   550 	{

   551 	  //lua_CFunction func = lua_tocfunction(L, i);

   552 	  //std::map<lua_CFunction, const char*>::iterator iter = s_cFuncInfoMap.find(func);

   553 	  //if(iter == s_cFuncInfoMap.end())

   554 	  goto defcase;

   555 	  //APPENDPRINT "function(%s)", iter->second END

   556 	}

   557       else

   558 	{

   559 	  APPENDPRINT "function(" END

   560 	    Proto * p = (L->base + i - 1)->value.gc->cl.l.p;

   561 	  int numParams = p->numparams + (p->is_vararg ? 1 : 0);

   562 	  for (int n = 0; n < p->numparams; n++)

   563 	    {

   564 	      APPENDPRINT "%s", getstr(p->locvars[n].varname) END

   565 		if (n != numParams - 1)

   566 		  APPENDPRINT "," END

   567 		    }

   568 	  if (p->is_vararg)

   569 	    APPENDPRINT "..." END

   570 	      APPENDPRINT ")" END

   571 	      }

   572       break;

   573     defcase: default:

   574       APPENDPRINT "%s:%p", luaL_typename(L, i), lua_topointer(L, i) END break;

   575     case LUA_TTABLE:

   576       {

   577 	// first make sure there's enough stack space

   578 	if (!lua_checkstack(L, 4))

   579 	  {

   580 	    // note that even if lua_checkstack never returns false,

   581 	    // that doesn't mean we didn't need to call it,

   582 	    // because calling it retrieves stack space past LUA_MINSTACK

   583 	    goto defcase;

   584 	  }

   585 

   586 	std::vector<const void *>::const_iterator foundCycleIter =

   587 	  std::find(s_tableAddressStack.begin(), s_tableAddressStack.end(), lua_topointer(L, i));

   588 	if (foundCycleIter != s_tableAddressStack.end())

   589 	  {

   590 	    int parentNum = s_tableAddressStack.end() - foundCycleIter;

   591 	    if (parentNum > 1)

   592 	      APPENDPRINT "%s:parent^%d", luaL_typename(L, i), parentNum END

   593 	      else

   594 		APPENDPRINT "%s:parent", luaL_typename(L, i) END

   595 		  }

   596 	else

   597 	  {

   598 	    s_tableAddressStack.push_back(lua_topointer(L, i));

   599 	    struct Scope { ~Scope(){ s_tableAddressStack. pop_back(); } } scope;

   600 

   601 	    APPENDPRINT "{" END

   602 

   603 	      lua_pushnil(L); // first key

   604 	    int		   keyIndex = lua_gettop(L);

   605 	    int		   valueIndex = keyIndex + 1;

   606 	    bool	   first = true;

   607 	    bool	   skipKey = true; // true if we're still in the "array part" of the table

   608 	    lua_Number arrayIndex = (lua_Number)0;

   609 	    while (lua_next(L, i))

   610 	      {

   611 		if (first)

   612 		  first = false;

   613 		else

   614 		  APPENDPRINT ", " END

   615 		    if (skipKey)

   616 		      {

   617 			arrayIndex += (lua_Number)1;

   618 			bool keyIsNumber = (lua_type(L, keyIndex) == LUA_TNUMBER);

   619 			skipKey = keyIsNumber && (lua_tonumber(L, keyIndex) == arrayIndex);

   620 		      }

   621 		if (!skipKey)

   622 		  {

   623 		    bool keyIsString = (lua_type(L, keyIndex) == LUA_TSTRING);

   624 		    bool invalidLuaIdentifier = (!keyIsString || !isalphaorunderscore(*lua_tostring(L, keyIndex)));

   625 		    if (invalidLuaIdentifier)

   626 		      if (keyIsString)

   627 			APPENDPRINT "['" END

   628 			else

   629 			  APPENDPRINT "[" END

   630 

   631 			    toCStringConverter(L, keyIndex, ptr, remaining);

   632 		    // key

   633 

   634 		    if (invalidLuaIdentifier)

   635 		      if (keyIsString)

   636 			APPENDPRINT "']=" END

   637 			else

   638 			  APPENDPRINT "]=" END

   639 			  else

   640 			    APPENDPRINT "=" END

   641 			      }

   642 

   643 		bool valueIsString = (lua_type(L, valueIndex) == LUA_TSTRING);

   644 		if (valueIsString)

   645 		  APPENDPRINT "'" END

   646 

   647 		    toCStringConverter(L, valueIndex, ptr, remaining);  // value

   648 

   649 		if (valueIsString)

   650 		  APPENDPRINT "'" END

   651 

   652 		    lua_pop(L, 1);

   653 

   654 		if (remaining <= 0)

   655 		  {

   656 		    lua_settop(L, keyIndex - 1); // stack might not be clean yet if we're breaking

   657 		    // early

   658 		    break;

   659 		  }

   660 	      }

   661 	    APPENDPRINT "}" END

   662 	      }

   663       }

   664       break;

   665     }

   666 

   667   if (usedMeta)

   668     {

   669       s_metacallStack.pop_back();

   670       lua_pop(L, 1);

   671     }

   672 }

   673 

   674 static const int s_tempStrMaxLen = 64 * 1024;

   675 static char s_tempStr [s_tempStrMaxLen];

   676 

   677 static char *rawToCString(lua_State *L, int idx)

   678 {

   679   int a = idx > 0 ? idx : 1;

   680   int n = idx > 0 ? idx : lua_gettop(L);

   681 

   682   char *ptr = s_tempStr;

   683   *ptr = 0;

   684 

   685   int remaining = s_tempStrMaxLen;

   686   for (int i = a; i <= n; i++)

   687     {

   688       toCStringConverter(L, i, ptr, remaining);

   689       if (i != n)

   690 	APPENDPRINT " " END

   691 	  }

   692 

   693   if (remaining < 3)

   694     {

   695       while (remaining < 6)

   696 	remaining++, ptr--;

   697       APPENDPRINT "..." END

   698 	}

   699   APPENDPRINT "\r\n" END

   700     // the trailing newline is so print() can avoid having to do wasteful things to print its newline

   701     // (string copying would be wasteful and calling info.print() twice can be extremely slow)

   702     // at the cost of functions that don't want the newline needing to trim off the last two characters

   703     // (which is a very fast operation and thus acceptable in this case)

   704 

   705     return s_tempStr;

   706 }

   707 #undef APPENDPRINT

   708 #undef END

   709 

   710 // replacement for luaB_tostring() that is able to show the contents of tables (and formats numbers better, and show function

   711 // prototypes)

   712 // can be called directly from lua via tostring(), assuming tostring hasn't been reassigned

   713 static int tostring(lua_State *L)

   714 {

   715   char *str = rawToCString(L);

   716   str[strlen(str) - 2] = 0; // hack: trim off the \r\n (which is there to simplify the print function's

   717   // task)

   718   lua_pushstring(L, str);

   719   return 1;

   720 }

   721 

   722 // like rawToCString, but will check if the global Lua function tostring()

   723 // has been replaced with a custom function, and call that instead if so

   724 static const char *toCString(lua_State *L, int idx)

   725 {

   726   int a = idx > 0 ? idx : 1;

   727   int n = idx > 0 ? idx : lua_gettop(L);

   728   lua_getglobal(L, "tostring");

   729   lua_CFunction cf = lua_tocfunction(L, -1);

   730   if (cf == tostring || lua_isnil(L, -1)) // optimization: if using our own C tostring function, we can

   731     // bypass the call through Lua and all the string object

   732     // allocation that would entail

   733     {

   734       lua_pop(L, 1);

   735       return rawToCString(L, idx);

   736     }

   737   else // if the user overrided the tostring function, we have to actually call it and store the

   738     // temporarily allocated string it returns

   739     {

   740       lua_pushstring(L, "");

   741       for (int i = a; i <= n; i++)

   742 	{

   743 	  lua_pushvalue(L, -2); // function to be called

   744 	  lua_pushvalue(L, i); // value to print

   745 	  lua_call(L, 1, 1);

   746 	  if (lua_tostring(L, -1) == NULL)

   747 	    luaL_error(L, LUA_QL("tostring") " must return a string to " LUA_QL("print"));

   748 	  lua_pushstring(L, (i < n) ? " " : "\r\n");

   749 	  lua_concat(L, 3);

   750 	}

   751       const char *str = lua_tostring(L, -1);

   752       strncpy(s_tempStr, str, s_tempStrMaxLen);

   753       s_tempStr[s_tempStrMaxLen - 1] = 0;

   754       lua_pop(L, 2);

   755       return s_tempStr;

   756     }

   757 }

   758 

   759 // replacement for luaB_print() that goes to the appropriate textbox instead of stdout

   760 static int print(lua_State *L)

   761 {

   762   const char *str = toCString(L);

   763 

   764   int uid = info_uid; //luaStateToUIDMap[L->l_G->mainthread];

   765   //LuaContextInfo& info = GetCurrentInfo();

   766 

   767   if (info_print)

   768     info_print(uid, str);

   769   else

   770     puts(str);

   771 

   772   //worry(L, 100);

   773   return 0;

   774 }

   775 

   776 static int printerror(lua_State *L, int idx)

   777 {

   778   lua_checkstack(L, lua_gettop(L) + 4);

   779 

   780   if (idx < 0)

   781     idx = lua_gettop(L) + 1 + idx;

   782 

   783   const char *str = rawToCString(L, idx);

   784 

   785   int uid = info_uid; //luaStateToUIDMap[L->l_G->mainthread];

   786   //LuaContextInfo& info = GetCurrentInfo();

   787 

   788   if (info_print)

   789     info_print(uid, str);

   790   else

   791     fputs(str, stderr);

   792 

   793   //worry(L, 100);

   794   return 0;

   795 }

   796 

   797 // vba.message(string msg)

   798 //

   799 //  Displays the given message on the screen.

   800 static int vba_message(lua_State *L)

   801 {

   802   const char *msg = luaL_checkstring(L, 1);

   803   systemScreenMessage(msg);

   804 

   805   return 0;

   806 }

   807 

   808 // provides an easy way to copy a table from Lua

   809 // (simple assignment only makes an alias, but sometimes an independent table is desired)

   810 // currently this function only performs a shallow copy,

   811 // but I think it should be changed to do a deep copy (possibly of configurable depth?)

   812 // that maintains the internal table reference structure

   813 static int copytable(lua_State *L)

   814 {

   815   int origIndex = 1; // we only care about the first argument

   816   int origType = lua_type(L, origIndex);

   817   if (origType == LUA_TNIL)

   818     {

   819       lua_pushnil(L);

   820       return 1;

   821     }

   822   if (origType != LUA_TTABLE)

   823     {

   824       luaL_typerror(L, 1, lua_typename(L, LUA_TTABLE));

   825       lua_pushnil(L);

   826       return 1;

   827     }

   828 

   829   lua_createtable(L, lua_objlen(L, 1), 0);

   830   int copyIndex = lua_gettop(L);

   831 

   832   lua_pushnil(L); // first key

   833   int keyIndex = lua_gettop(L);

   834   int valueIndex = keyIndex + 1;

   835 

   836   while (lua_next(L, origIndex))

   837     {

   838       lua_pushvalue(L, keyIndex);

   839       lua_pushvalue(L, valueIndex);

   840       lua_rawset(L, copyIndex); // copytable[key] = value

   841       lua_pop(L, 1);

   842     }

   843 

   844   // copy the reference to the metatable as well, if any

   845   if (lua_getmetatable(L, origIndex))

   846     lua_setmetatable(L, copyIndex);

   847 

   848   return 1; // return the new table

   849 }

   850 

   851 // because print traditionally shows the address of tables,

   852 // and the print function I provide instead shows the contents of tables,

   853 // I also provide this function

   854 // (otherwise there would be no way to see a table's address, AFAICT)

   855 static int addressof(lua_State *L)

   856 {

   857   const void *ptr = lua_topointer(L, -1);

   858   lua_pushinteger(L, (lua_Integer)ptr);

   859   return 1;

   860 }

   861 

   862 struct registerPointerMap

   863 {

   864   const char *  registerName;

   865   unsigned int *pointer;

   866   int dataSize;

   867 };

   868 

   869 #define RPM_ENTRY(name, var)			\

   870   { name, (unsigned int *)&var, sizeof(var)	\

   871       }						\

   872     ,

   873 

   874 extern gbRegister AF;

   875 extern gbRegister BC;

   876 extern gbRegister DE;

   877 extern gbRegister HL;

   878 extern gbRegister SP;

   879 extern gbRegister PC;

   880 extern u16 IFF;

   881 

   882 registerPointerMap regPointerMap [] = {

   883   // gba registers

   884   RPM_ENTRY("r0",	  reg[0].I)

   885   RPM_ENTRY("r1",	  reg[1].I)

   886   RPM_ENTRY("r2",	  reg[2].I)

   887   RPM_ENTRY("r3",	  reg[3].I)

   888   RPM_ENTRY("r4",	  reg[4].I)

   889   RPM_ENTRY("r5",	  reg[5].I)

   890   RPM_ENTRY("r6",	  reg[6].I)

   891   RPM_ENTRY("r7",	  reg[7].I)

   892   RPM_ENTRY("r8",	  reg[8].I)

   893   RPM_ENTRY("r9",	  reg[9].I)

   894   RPM_ENTRY("r10",  reg[10].I)

   895   RPM_ENTRY("r11",  reg[11].I)

   896   RPM_ENTRY("r12",  reg[12].I)

   897   RPM_ENTRY("r13",  reg[13].I)

   898   RPM_ENTRY("r14",  reg[14].I)

   899   RPM_ENTRY("r15",  reg[15].I)

   900   RPM_ENTRY("cpsr", reg[16].I)

   901   RPM_ENTRY("spsr", reg[17].I)

   902   // gb registers

   903   RPM_ENTRY("a",	  AF.B.B1)

   904   RPM_ENTRY("f",	  AF.B.B0)

   905   RPM_ENTRY("b",	  BC.B.B1)

   906   RPM_ENTRY("c",	  BC.B.B0)

   907   RPM_ENTRY("d",	  DE.B.B1)

   908   RPM_ENTRY("e",	  DE.B.B0)

   909   RPM_ENTRY("h",	  HL.B.B1)

   910   RPM_ENTRY("l",	  HL.B.B0)

   911   RPM_ENTRY("af",	  AF.W)

   912   RPM_ENTRY("bc",	  BC.W)

   913   RPM_ENTRY("de",	  DE.W)

   914   RPM_ENTRY("hl",	  HL.W)

   915   RPM_ENTRY("sp",	  SP.W)

   916   RPM_ENTRY("pc",	  PC.W)

   917   {}

   918 };

   919 

   920 struct cpuToRegisterMap

   921 {

   922   const char *cpuName;

   923   registerPointerMap *rpmap;

   924 }

   925   cpuToRegisterMaps [] =

   926     {

   927       { "", regPointerMap },

   928     };

   929 

   930 //DEFINE_LUA_FUNCTION(memory_getregister, "cpu_dot_registername_string")

   931 static int memory_getregister(lua_State *L)

   932 {

   933   const char *qualifiedRegisterName = luaL_checkstring(L, 1);

   934   lua_settop(L, 0);

   935   for (int cpu = 0; cpu < sizeof(cpuToRegisterMaps) / sizeof(*cpuToRegisterMaps); cpu++)

   936     {

   937       cpuToRegisterMap ctrm = cpuToRegisterMaps[cpu];

   938       int cpuNameLen		  = strlen(ctrm.cpuName);

   939       if (!strnicmp(qualifiedRegisterName, ctrm.cpuName, cpuNameLen))

   940 	{

   941 	  qualifiedRegisterName += cpuNameLen;

   942 	  for (int reg = 0; ctrm.rpmap[reg].dataSize; reg++)

   943 	    {

   944 	      registerPointerMap rpm = ctrm.rpmap[reg];

   945 	      if (!stricmp(qualifiedRegisterName, rpm.registerName))

   946 		{

   947 		  switch (rpm.dataSize)

   948 		    {

   949 		    default:

   950 		    case 1:

   951 		      lua_pushinteger(L, *(unsigned char *)rpm.pointer); break;

   952 		    case 2:

   953 		      lua_pushinteger(L, *(unsigned short *)rpm.pointer); break;

   954 		    case 4:

   955 		      lua_pushinteger(L, *(unsigned long *)rpm.pointer); break;

   956 		    }

   957 		  return 1;

   958 		}

   959 	    }

   960 	  lua_pushnil(L);

   961 	  return 1;

   962 	}

   963     }

   964   lua_pushnil(L);

   965   return 1;

   966 }

   967 

   968 //DEFINE_LUA_FUNCTION(memory_setregister, "cpu_dot_registername_string,value")

   969 static int memory_setregister(lua_State *L)

   970 {

   971   const char *  qualifiedRegisterName = luaL_checkstring(L, 1);

   972   unsigned long value = (unsigned long)(luaL_checkinteger(L, 2));

   973   lua_settop(L, 0);

   974   for (int cpu = 0; cpu < sizeof(cpuToRegisterMaps) / sizeof(*cpuToRegisterMaps); cpu++)

   975     {

   976       cpuToRegisterMap ctrm = cpuToRegisterMaps[cpu];

   977       int cpuNameLen		  = strlen(ctrm.cpuName);

   978       if (!strnicmp(qualifiedRegisterName, ctrm.cpuName, cpuNameLen))

   979 	{

   980 	  qualifiedRegisterName += cpuNameLen;

   981 	  for (int reg = 0; ctrm.rpmap[reg].dataSize; reg++)

   982 	    {

   983 	      registerPointerMap rpm = ctrm.rpmap[reg];

   984 	      if (!stricmp(qualifiedRegisterName, rpm.registerName))

   985 		{

   986 		  switch (rpm.dataSize)

   987 		    {

   988 		    default:

   989 		    case 1:

   990 		      *(unsigned char *)rpm.pointer = (unsigned char)(value & 0xFF); break;

   991 		    case 2:

   992 		      *(unsigned short *)rpm.pointer = (unsigned short)(value & 0xFFFF); break;

   993 		    case 4:

   994 		      *(unsigned long *)rpm.pointer = value; break;

   995 		    }

   996 		  return 0;

   997 		}

   998 	    }

   999 	  return 0;

  1000 	}

  1001     }

  1002   return 0;

  1003 }

  1004 

  1005 void HandleCallbackError(lua_State *L)

  1006 {

  1007   if (L->errfunc || L->errorJmp)

  1008     luaL_error(L, "%s", lua_tostring(L, -1));

  1009   else

  1010     {

  1011       lua_pushnil(LUA);

  1012       lua_setfield(LUA, LUA_REGISTRYINDEX, guiCallbackTable);

  1013 

  1014       // Error?

  1015       //#if (defined(WIN32) && !defined(SDL))

  1016       //		info_print(info_uid, lua_tostring(LUA, -1)); //Clear_Sound_Buffer();

  1017       // AfxGetApp()->m_pMainWnd->MessageBox(lua_tostring(LUA, -1), "Lua run error", MB_OK | MB_ICONSTOP);

  1018       //#else

  1019       //		fprintf(stderr, "Lua thread bombed out: %s\n", lua_tostring(LUA, -1));

  1020       //#endif

  1021       printerror(LUA, -1);

  1022       VBALuaStop();

  1023     }

  1024 }

  1025 

  1026 void CallRegisteredLuaFunctions(LuaCallID calltype)

  1027 {

  1028   assert((unsigned int)calltype < (unsigned int)LUACALL_COUNT);

  1029 

  1030   const char *idstring = luaCallIDStrings[calltype];

  1031 

  1032   if (!LUA)

  1033     return;

  1034 

  1035   lua_settop(LUA, 0);

  1036   lua_getfield(LUA, LUA_REGISTRYINDEX, idstring);

  1037 

  1038   int errorcode = 0;

  1039   if (lua_isfunction(LUA, -1))

  1040     {

  1041       errorcode = lua_pcall(LUA, 0, 0, 0);

  1042       if (errorcode)

  1043 	HandleCallbackError(LUA);

  1044     }

  1045   else

  1046     {

  1047       lua_pop(LUA, 1);

  1048     }

  1049 }

  1050 

  1051 // the purpose of this structure is to provide a way of

  1052 // QUICKLY determining whether a memory address range has a hook associated with it,

  1053 // with a bias toward fast rejection because the majority of addresses will not be hooked.

  1054 // (it must not use any part of Lua or perform any per-script operations,

  1055 //  otherwise it would definitely be too slow.)

  1056 // calculating the regions when a hook is added/removed may be slow,

  1057 // but this is an intentional tradeoff to obtain a high speed of checking during later execution

  1058 struct TieredRegion

  1059 {

  1060   template<unsigned int maxGap>

  1061   struct Region

  1062   {

  1063     struct Island

  1064     {

  1065       unsigned int	   start;

  1066       unsigned int	   end;

  1067       __forceinline bool Contains(unsigned int address, int size) const { return address < end && address + size > start; }

  1068     };

  1069     std::vector<Island> islands;

  1070 

  1071     void Calculate(const std::vector<unsigned int> &bytes)

  1072     {

  1073       islands. clear();

  1074 

  1075       unsigned int lastEnd = ~0;

  1076 

  1077       std::vector<unsigned int>::const_iterator iter = bytes.begin();

  1078       std::vector<unsigned int>::const_iterator end  = bytes.end();

  1079       for (; iter != end; ++iter)

  1080 	{

  1081 	  unsigned int addr = *iter;

  1082 	  if (addr < lastEnd || addr > lastEnd + (long long)maxGap)

  1083 	    {

  1084 	      islands. push_back(Island());

  1085 	      islands. back().start = addr;

  1086 	    }

  1087 	  islands.back(). end = addr + 1;

  1088 	  lastEnd = addr + 1;

  1089 	}

  1090     }

  1091 

  1092     bool Contains(unsigned int address, int size) const

  1093     {

  1094       for (size_t i = 0; i != islands.size(); ++i)

  1095 	{

  1096 	  if (islands[i].Contains(address, size))

  1097 	    return true;

  1098 	}

  1099       return false;

  1100     }

  1101   };

  1102 

  1103   Region<0xFFFFFFFF> broad;

  1104   Region<0x1000>	   mid;

  1105   Region<0>		   narrow;

  1106 

  1107   void Calculate(std::vector<unsigned int> &bytes)

  1108   {

  1109     std:: sort(bytes.begin(), bytes.end());

  1110 

  1111     broad.	Calculate(bytes);

  1112     mid.	Calculate(bytes);

  1113     narrow. Calculate(bytes);

  1114   }

  1115 

  1116   TieredRegion()

  1117   {

  1118     std::vector <unsigned int> temp;

  1119     Calculate(temp);

  1120   }

  1121 

  1122   __forceinline int NotEmpty()

  1123   {

  1124     return broad.islands.size();

  1125   }

  1126 

  1127   // note: it is illegal to call this if NotEmpty() returns 0

  1128   __forceinline bool Contains(unsigned int address, int size)

  1129   {

  1130     return broad.islands[0].Contains(address, size) &&

  1131       mid.Contains(address, size) &&

  1132       narrow.Contains(address, size);

  1133   }

  1134 };

  1135 TieredRegion hookedRegions [LUAMEMHOOK_COUNT];

  1136 

  1137 static void CalculateMemHookRegions(LuaMemHookType hookType)

  1138 {

  1139   std::vector<unsigned int> hookedBytes;

  1140   //	std::map<int, LuaContextInfo*>::iterator iter = luaContextInfo.begin();

  1141   //	std::map<int, LuaContextInfo*>::iterator end = luaContextInfo.end();

  1142   //	while(iter != end)

  1143   //	{

  1144   //		LuaContextInfo& info = *iter->second;

  1145   if (/*info.*/ numMemHooks)

  1146     {

  1147       lua_State *L = LUA /*info.L*/;

  1148       if (L)

  1149 	{

  1150 	  lua_settop(L, 0);

  1151 	  lua_getfield(L, LUA_REGISTRYINDEX, luaMemHookTypeStrings[hookType]);

  1152 	  lua_pushnil(L);

  1153 	  while (lua_next(L, -2))

  1154 	    {

  1155 	      if (lua_isfunction(L, -1))

  1156 		{

  1157 		  unsigned int addr = lua_tointeger(L, -2);

  1158 		  hookedBytes.push_back(addr);

  1159 		}

  1160 	      lua_pop(L, 1);

  1161 	    }

  1162 	  lua_settop(L, 0);

  1163 	}

  1164     }

  1165   //		++iter;

  1166   //	}

  1167   hookedRegions[hookType].Calculate(hookedBytes);

  1168 }

  1169 

  1170 static void CallRegisteredLuaMemHook_LuaMatch(unsigned int address, int size, unsigned int value, LuaMemHookType hookType)

  1171 {

  1172   //	std::map<int, LuaContextInfo*>::iterator iter = luaContextInfo.begin();

  1173   //	std::map<int, LuaContextInfo*>::iterator end = luaContextInfo.end();

  1174   //	while(iter != end)

  1175   //	{

  1176   //		LuaContextInfo& info = *iter->second;

  1177   if (/*info.*/ numMemHooks)

  1178     {

  1179       lua_State *L = LUA /*info.L*/;

  1180       if (L /* && !info.panic*/)

  1181 	{

  1182 #ifdef USE_INFO_STACK

  1183 	  infoStack.insert(infoStack.begin(), &info);

  1184 	  struct Scope { ~Scope(){ infoStack. erase(infoStack.begin()); } } scope;

  1185 #endif

  1186 	  lua_settop(L, 0);

  1187 	  lua_getfield(L, LUA_REGISTRYINDEX, luaMemHookTypeStrings[hookType]);

  1188 	  for (int i = address; i != address + size; i++)

  1189 	    {

  1190 	      lua_rawgeti(L, -1, i);

  1191 	      if (lua_isfunction(L, -1))

  1192 		{

  1193 		  bool wasRunning = (luaRunning != 0) /*info.running*/;

  1194 		  luaRunning /*info.running*/ = true;

  1195 		  //RefreshScriptSpeedStatus();

  1196 		  lua_pushinteger(L, address);

  1197 		  lua_pushinteger(L, size);

  1198 		  int errorcode = lua_pcall(L, 2, 0, 0);

  1199 		  luaRunning /*info.running*/ = wasRunning;

  1200 		  //RefreshScriptSpeedStatus();

  1201 		  if (errorcode)

  1202 		    {

  1203 		      HandleCallbackError(L);

  1204 		      //int uid = iter->first;

  1205 		      //HandleCallbackError(L,info,uid,true);

  1206 		    }

  1207 		  break;

  1208 		}

  1209 	      else

  1210 		{

  1211 		  lua_pop(L, 1);

  1212 		}

  1213 	    }

  1214 	  lua_settop(L, 0);

  1215 	}

  1216     }

  1217   //		++iter;

  1218   //	}

  1219 }

  1220 

  1221 void CallRegisteredLuaMemHook(unsigned int address, int size, unsigned int value, LuaMemHookType hookType)

  1222 {

  1223   // performance critical! (called VERY frequently)

  1224   // I suggest timing a large number of calls to this function in Release if you change anything in here,

  1225   // before and after, because even the most innocent change can make it become 30% to 400% slower.

  1226   // a good amount to test is: 100000000 calls with no hook set, and another 100000000 with a hook set.

  1227   // (on my system that consistently took 200 ms total in the former case and 350 ms total in the latter

  1228   // case)

  1229   if (hookedRegions[hookType].NotEmpty())

  1230     {

  1231       //if((hookType <= LUAMEMHOOK_EXEC) && (address >= 0xE00000))

  1232       //	address |= 0xFF0000; // account for mirroring of RAM

  1233       if (hookedRegions[hookType].Contains(address, size))

  1234 	CallRegisteredLuaMemHook_LuaMatch(address, size, value, hookType);  // something has hooked this

  1235       // specific address

  1236     }

  1237 }

  1238 

  1239 static int memory_registerHook(lua_State *L, LuaMemHookType hookType, int defaultSize)

  1240 {

  1241   // get first argument: address

  1242   unsigned int addr = luaL_checkinteger(L, 1);

  1243   //if((addr & ~0xFFFFFF) == ~0xFFFFFF)

  1244   //	addr &= 0xFFFFFF;

  1245 

  1246   // get optional second argument: size

  1247   int size	= defaultSize;

  1248   int funcIdx = 2;

  1249   if (lua_isnumber(L, 2))

  1250     {

  1251       size = luaL_checkinteger(L, 2);

  1252       if (size < 0)

  1253 	{

  1254 	  size  = -size;

  1255 	  addr -= size;

  1256 	}

  1257       funcIdx++;

  1258     }

  1259 

  1260   // check last argument: callback function

  1261   bool clearing = lua_isnil(L, funcIdx);

  1262   if (!clearing)

  1263     luaL_checktype(L, funcIdx, LUA_TFUNCTION);

  1264   lua_settop(L, funcIdx);

  1265 

  1266   // get the address-to-callback table for this hook type of the current script

  1267   lua_getfield(L, LUA_REGISTRYINDEX, luaMemHookTypeStrings[hookType]);

  1268 

  1269   // count how many callback functions we'll be displacing

  1270   int numFuncsAfter  = clearing ? 0 : size;

  1271   int numFuncsBefore = 0;

  1272   for (unsigned int i = addr; i != addr + size; i++)

  1273     {

  1274       lua_rawgeti(L, -1, i);

  1275       if (lua_isfunction(L, -1))

  1276 	numFuncsBefore++;

  1277       lua_pop(L, 1);

  1278     }

  1279 

  1280   // put the callback function in the address slots

  1281   for (unsigned int i = addr; i != addr + size; i++)

  1282     {

  1283       lua_pushvalue(L, -2);

  1284       lua_rawseti(L, -2, i);

  1285     }

  1286 

  1287   // adjust the count of active hooks

  1288   //LuaContextInfo& info = GetCurrentInfo();

  1289   /*info.*/ numMemHooks += numFuncsAfter - numFuncsBefore;

  1290 

  1291   // re-cache regions of hooked memory across all scripts

  1292   CalculateMemHookRegions(hookType);

  1293 

  1294   //StopScriptIfFinished(luaStateToUIDMap[L]);

  1295   return 0;

  1296 }

  1297 

  1298 LuaMemHookType MatchHookTypeToCPU(lua_State *L, LuaMemHookType hookType)

  1299 {

  1300   int cpuID = 0;

  1301 

  1302   int cpunameIndex = 0;

  1303   if (lua_type(L, 2) == LUA_TSTRING)

  1304     cpunameIndex = 2;

  1305   else if (lua_type(L, 3) == LUA_TSTRING)

  1306     cpunameIndex = 3;

  1307 

  1308   if (cpunameIndex)

  1309     {

  1310       const char *cpuName = lua_tostring(L, cpunameIndex);

  1311       if (!stricmp(cpuName, "sub"))

  1312 	cpuID = 1;

  1313       lua_remove(L, cpunameIndex);

  1314     }

  1315 

  1316   switch (cpuID)

  1317     {

  1318     case 0:

  1319       return hookType;

  1320 

  1321     case 1:

  1322       switch (hookType)

  1323 	{

  1324 	case LUAMEMHOOK_WRITE:

  1325 	  return LUAMEMHOOK_WRITE_SUB;

  1326 	case LUAMEMHOOK_READ:

  1327 	  return LUAMEMHOOK_READ_SUB;

  1328 	case LUAMEMHOOK_EXEC:

  1329 	  return LUAMEMHOOK_EXEC_SUB;

  1330 	}

  1331     }

  1332   return hookType;

  1333 }

  1334 

  1335 static int memory_registerwrite(lua_State *L)

  1336 {

  1337   return memory_registerHook(L, MatchHookTypeToCPU(L, LUAMEMHOOK_WRITE), 1);

  1338 }

  1339 

  1340 static int memory_registerread(lua_State *L)

  1341 {

  1342   return memory_registerHook(L, MatchHookTypeToCPU(L, LUAMEMHOOK_READ), 1);

  1343 }

  1344 

  1345 static int memory_registerexec(lua_State *L)

  1346 {

  1347   return memory_registerHook(L, MatchHookTypeToCPU(L, LUAMEMHOOK_EXEC), 1);

  1348 }

  1349 

  1350 //int vba.lagcount

  1351 //

  1352 

  1353 //Returns the lagcounter variable

  1354 static int vba_getlagcount(lua_State *L)

  1355 {

  1356   lua_pushinteger(L, systemCounters.lagCount);

  1357   return 1;

  1358 }

  1359 

  1360 //int vba.lagged

  1361 //

  1362 //Returns true if the current frame is a lag frame

  1363 static int vba_lagged(lua_State *L)

  1364 {

  1365   lua_pushboolean(L, systemCounters.laggedLast);

  1366   return 1;

  1367 }

  1368 

  1369 // boolean vba.emulating()

  1370 int vba_emulating(lua_State *L)

  1371 {

  1372   lua_pushboolean(L, systemIsEmulating());

  1373   return 1;

  1374 }

  1375 

  1376 int movie_isactive(lua_State *L)

  1377 {

  1378   lua_pushboolean(L, VBAMovieActive());

  1379   return 1;

  1380 }

  1381 

  1382 int movie_isrecording(lua_State *L)

  1383 {

  1384   lua_pushboolean(L, VBAMovieRecording());

  1385   return 1;

  1386 }

  1387 

  1388 int movie_isplaying(lua_State *L)

  1389 {

  1390   lua_pushboolean(L, VBAMoviePlaying());

  1391   return 1;

  1392 }

  1393 

  1394 int movie_getlength(lua_State *L)

  1395 {

  1396   if (VBAMovieActive())

  1397     lua_pushinteger(L, VBAMovieGetLength());

  1398   else

  1399     lua_pushinteger(L, 0);

  1400   return 1;

  1401 }

  1402 

  1403 static int memory_readbyte(lua_State *L)

  1404 {

  1405   u32 addr;

  1406   u8	val;

  1407 

  1408   addr = luaL_checkinteger(L, 1);

  1409   if (systemIsRunningGBA())

  1410     {

  1411       val = CPUReadByteQuick(addr);

  1412     }

  1413   else

  1414     {

  1415       val = gbReadMemoryQuick8(addr);

  1416     }

  1417 

  1418   lua_pushinteger(L, val);

  1419   return 1;

  1420 }

  1421 

  1422 static int memory_readbytesigned(lua_State *L)

  1423 {

  1424   u32 addr;

  1425   s8	val;

  1426 

  1427   addr = luaL_checkinteger(L, 1);

  1428   if (systemIsRunningGBA())

  1429     {

  1430       val = (s8) CPUReadByteQuick(addr);

  1431     }

  1432   else

  1433     {

  1434       val = (s8) gbReadMemoryQuick8(addr);

  1435     }

  1436 

  1437   lua_pushinteger(L, val);

  1438   return 1;

  1439 }

  1440 

  1441 static int memory_readword(lua_State *L)

  1442 {

  1443   u32 addr;

  1444   u16 val;

  1445 

  1446   addr = luaL_checkinteger(L, 1);

  1447   if (systemIsRunningGBA())

  1448     {

  1449       val = CPUReadHalfWordQuick(addr);

  1450     }

  1451   else

  1452     {

  1453       val = gbReadMemoryQuick16(addr & 0x0000FFFF);

  1454     }

  1455 

  1456   lua_pushinteger(L, val);

  1457   return 1;

  1458 }

  1459 

  1460 static int memory_readwordsigned(lua_State *L)

  1461 {

  1462   u32 addr;

  1463   s16 val;

  1464 

  1465   addr = luaL_checkinteger(L, 1);

  1466   if (systemIsRunningGBA())

  1467     {

  1468       val = (s16) CPUReadHalfWordQuick(addr);

  1469     }

  1470   else

  1471     {

  1472       val = (s16) gbReadMemoryQuick16(addr);

  1473     }

  1474 

  1475   lua_pushinteger(L, val);

  1476   return 1;

  1477 }

  1478 

  1479 static int memory_readdword(lua_State *L)

  1480 {

  1481   u32 addr;

  1482   u32 val;

  1483 

  1484   addr = luaL_checkinteger(L, 1);

  1485   if (systemIsRunningGBA())

  1486     {

  1487       val = CPUReadMemoryQuick(addr);

  1488     }

  1489   else

  1490     {

  1491       val = gbReadMemoryQuick32(addr & 0x0000FFFF);

  1492     }

  1493 

  1494   // lua_pushinteger doesn't work properly for 32bit system, does it?

  1495   if (val >= 0x80000000 && sizeof(int) <= 4)

  1496     lua_pushnumber(L, val);

  1497   else

  1498     lua_pushinteger(L, val);

  1499   return 1;

  1500 }

  1501 

  1502 static int memory_readdwordsigned(lua_State *L)

  1503 {

  1504   u32 addr;

  1505   s32 val;

  1506 

  1507   addr = luaL_checkinteger(L, 1);

  1508   if (systemIsRunningGBA())

  1509     {

  1510       val = (s32) CPUReadMemoryQuick(addr);

  1511     }

  1512   else

  1513     {

  1514       val = (s32) gbReadMemoryQuick32(addr);

  1515     }

  1516 

  1517   lua_pushinteger(L, val);

  1518   return 1;

  1519 }

  1520 

  1521 static int memory_readbyterange(lua_State *L)

  1522 {

  1523   uint32 address = luaL_checkinteger(L, 1);

  1524   int	   length  = luaL_checkinteger(L, 2);

  1525 

  1526   if (length < 0)

  1527     {

  1528       address += length;

  1529       length	 = -length;

  1530     }

  1531 

  1532   // push the array

  1533   lua_createtable(L, abs(length), 0);

  1534 

  1535   // put all the values into the (1-based) array

  1536   for (int a = address, n = 1; n <= length; a++, n++)

  1537     {

  1538       unsigned char value;

  1539 

  1540       if (systemIsRunningGBA())

  1541 	{

  1542 	  value = CPUReadByteQuick(a);

  1543 	}

  1544       else

  1545 	{

  1546 	  value = gbReadMemoryQuick8(a);

  1547 	}

  1548 

  1549       lua_pushinteger(L, value);

  1550       lua_rawseti(L, -2, n);

  1551     }

  1552 

  1553   return 1;

  1554 }

  1555 

  1556 static int memory_writebyte(lua_State *L)

  1557 {

  1558   u32 addr;

  1559   int val;

  1560 

  1561   addr = luaL_checkinteger(L, 1);

  1562   val	 = luaL_checkinteger(L, 2);

  1563   if (systemIsRunningGBA())

  1564     {

  1565       CPUWriteByteQuick(addr, val);

  1566     }

  1567   else

  1568     {

  1569       gbWriteMemoryQuick8(addr, val);

  1570     }

  1571 

  1572   CallRegisteredLuaMemHook(addr, 1, val, LUAMEMHOOK_WRITE);

  1573   return 0;

  1574 }

  1575 

  1576 static int memory_writeword(lua_State *L)

  1577 {

  1578   u32 addr;

  1579   int val;

  1580 

  1581   addr = luaL_checkinteger(L, 1);

  1582   val	 = luaL_checkinteger(L, 2);

  1583   if (systemIsRunningGBA())

  1584     {

  1585       CPUWriteHalfWordQuick(addr, val);

  1586     }

  1587   else

  1588     {

  1589       gbWriteMemoryQuick16(addr, val);

  1590     }

  1591 

  1592   CallRegisteredLuaMemHook(addr, 2, val, LUAMEMHOOK_WRITE);

  1593   return 0;

  1594 }

  1595 

  1596 static int memory_writedword(lua_State *L)

  1597 {

  1598   u32 addr;

  1599   int val;

  1600 

  1601   addr = luaL_checkinteger(L, 1);

  1602   val	 = luaL_checkinteger(L, 2);

  1603   if (systemIsRunningGBA())

  1604     {

  1605       CPUWriteMemoryQuick(addr, val);

  1606     }

  1607   else

  1608     {

  1609       gbWriteMemoryQuick32(addr, val);

  1610     }

  1611 

  1612   CallRegisteredLuaMemHook(addr, 4, val, LUAMEMHOOK_WRITE);

  1613   return 0;

  1614 }

  1615 

  1616 static int memory_gbromreadbyte(lua_State *L)

  1617 {

  1618   u32 addr;

  1619   u8	val;

  1620 

  1621   addr = luaL_checkinteger(L, 1);

  1622   if (systemIsRunningGBA())

  1623     {

  1624       lua_pushnil(L);

  1625       return 1;

  1626     }

  1627   else

  1628     {

  1629       val = gbReadROMQuick8(addr);

  1630     }

  1631 

  1632   lua_pushinteger(L, val);

  1633   return 1;

  1634 }

  1635 

  1636 static int memory_gbromreadbytesigned(lua_State *L)

  1637 {

  1638   u32 addr;

  1639   s8	val;

  1640 

  1641   addr = luaL_checkinteger(L, 1);

  1642   if (systemIsRunningGBA())

  1643     {

  1644       lua_pushnil(L);

  1645       return 1;

  1646     }

  1647   else

  1648     {

  1649       val = (s8) gbReadROMQuick8(addr);

  1650     }

  1651 

  1652   lua_pushinteger(L, val);

  1653   return 1;

  1654 }

  1655 

  1656 static int memory_gbromreadword(lua_State *L)

  1657 {

  1658   u32 addr;

  1659   u16 val;

  1660 

  1661   addr = luaL_checkinteger(L, 1);

  1662   if (systemIsRunningGBA())

  1663     {

  1664       lua_pushnil(L);

  1665       return 1;

  1666     }

  1667   else

  1668     {

  1669       val = gbReadROMQuick16(addr);

  1670     }

  1671 

  1672   lua_pushinteger(L, val);

  1673   return 1;

  1674 }

  1675 

  1676 static int memory_gbromreadwordsigned(lua_State *L)

  1677 {

  1678   u32 addr;

  1679   s16 val;

  1680 

  1681   addr = luaL_checkinteger(L, 1);

  1682   if (systemIsRunningGBA())

  1683     {

  1684       lua_pushnil(L);

  1685       return 1;

  1686     }

  1687   else

  1688     {

  1689       val = (s16) gbReadROMQuick16(addr);

  1690     }

  1691 

  1692   lua_pushinteger(L, val);

  1693   return 1;

  1694 }

  1695 

  1696 static int memory_gbromreaddword(lua_State *L)

  1697 {

  1698   u32 addr;

  1699   u32 val;

  1700 

  1701   addr = luaL_checkinteger(L, 1);

  1702   if (systemIsRunningGBA())

  1703     {

  1704       lua_pushnil(L);

  1705       return 1;

  1706     }

  1707   else

  1708     {

  1709       val = gbReadROMQuick32(addr);

  1710     }

  1711 

  1712   // lua_pushinteger doesn't work properly for 32bit system, does it?

  1713   if (val >= 0x80000000 && sizeof(int) <= 4)

  1714     lua_pushnumber(L, val);

  1715   else

  1716     lua_pushinteger(L, val);

  1717   return 1;

  1718 }

  1719 

  1720 static int memory_gbromreaddwordsigned(lua_State *L)

  1721 {

  1722   u32 addr;

  1723   s32 val;

  1724 

  1725   addr = luaL_checkinteger(L, 1);

  1726   if (systemIsRunningGBA())

  1727     {

  1728       lua_pushnil(L);

  1729       return 1;

  1730     }

  1731   else

  1732     {

  1733       val = (s32) gbReadROMQuick32(addr);

  1734     }

  1735 

  1736   lua_pushinteger(L, val);

  1737   return 1;

  1738 }

  1739 

  1740 static int memory_gbromreadbyterange(lua_State *L)

  1741 {

  1742   uint32 address = luaL_checkinteger(L, 1);

  1743   int	   length  = luaL_checkinteger(L, 2);

  1744 

  1745   if (length < 0)

  1746     {

  1747       address += length;

  1748       length	 = -length;

  1749     }

  1750 

  1751   // push the array

  1752   lua_createtable(L, abs(length), 0);

  1753 

  1754   // put all the values into the (1-based) array

  1755   for (int a = address, n = 1; n <= length; a++, n++)

  1756     {

  1757       unsigned char value;

  1758 

  1759       if (systemIsRunningGBA())

  1760 	{

  1761 	  lua_pushnil(L);

  1762 	  return 1;

  1763 	}

  1764       else

  1765 	{

  1766 	  value = gbReadROMQuick8(a);

  1767 	}

  1768 

  1769       lua_pushinteger(L, value);

  1770       lua_rawseti(L, -2, n);

  1771     }

  1772 

  1773   return 1;

  1774 }

  1775 

  1776 // table joypad.get(int which = 1)

  1777 //

  1778 //  Reads the joypads as inputted by the user.

  1779 static int joy_get_internal(lua_State *L, bool reportUp, bool reportDown)

  1780 {

  1781   // Reads the joypads as inputted by the user

  1782   int which = luaL_checkinteger(L, 1);

  1783 

  1784   if (which < 0 || which > 4)

  1785     {

  1786       luaL_error(L, "Invalid input port (valid range 0-4, specified %d)", which);

  1787     }

  1788 

  1789   uint32 buttons = systemGetOriginalJoypad(which - 1, false);

  1790 

  1791   lua_newtable(L);

  1792 

  1793   int i;

  1794   for (i = 0; i < 10; i++)

  1795     {

  1796       bool pressed = (buttons & (1 << i)) != 0;

  1797       if ((pressed && reportDown) || (!pressed && reportUp))

  1798 	{

  1799 	  lua_pushboolean(L, pressed);

  1800 	  lua_setfield(L, -2, button_mappings[i]);

  1801 	}

  1802     }

  1803 

  1804   return 1;

  1805 }

  1806 

  1807 // joypad.get(which)

  1808 // returns a table of every game button,

  1809 // true meaning currently-held and false meaning not-currently-held

  1810 // (as of last frame boundary)

  1811 // this WILL read input from a currently-playing movie

  1812 static int joypad_get(lua_State *L)

  1813 {

  1814   return joy_get_internal(L, true, true);

  1815 }

  1816 

  1817 // joypad.getdown(which)

  1818 // returns a table of every game button that is currently held

  1819 static int joypad_getdown(lua_State *L)

  1820 {

  1821   return joy_get_internal(L, false, true);

  1822 }

  1823 

  1824 // joypad.getup(which)

  1825 // returns a table of every game button that is not currently held

  1826 static int joypad_getup(lua_State *L)

  1827 {

  1828   return joy_get_internal(L, true, false);

  1829 }

  1830 

  1831 // joypad.set(int which, table buttons)

  1832 //

  1833 //   Sets the given buttons to be pressed during the next

  1834 //   frame advance. The table should have the right

  1835 

  1836 //   keys (no pun intended) set.

  1837 static int joypad_set(lua_State *L)

  1838 {

  1839   // Which joypad we're tampering with

  1840   int which = luaL_checkinteger(L, 1);

  1841   if (which < 0 || which > 4)

  1842     {

  1843       luaL_error(L, "Invalid output port (valid range 0-4, specified %d)", which);

  1844     }

  1845 

  1846   if (which == 0)

  1847     which = systemGetDefaultJoypad();

  1848 

  1849   // And the table of buttons.

  1850   luaL_checktype(L, 2, LUA_TTABLE);

  1851 

  1852   // Set up for taking control of the indicated controller

  1853   lua_joypads_used	  |= 1 << (which - 1);

  1854   lua_joypads[which - 1] = 0;

  1855 

  1856   for (int i = 0; i < 10; i++)

  1857     {

  1858       const char *name = button_mappings[i];

  1859       lua_getfield(L, 2, name);

  1860       if (!lua_isnil(L, -1))

  1861 	{

  1862 	  bool pressed = lua_toboolean(L, -1) != 0;

  1863 	  if (pressed)

  1864 	    lua_joypads[which - 1] |= 1 << i;

  1865 	  else

  1866 	    lua_joypads[which - 1] &= ~(1 << i);

  1867 	}

  1868       lua_pop(L, 1);

  1869     }

  1870 

  1871   return 0;

  1872 }

  1873 

  1874 // Helper function to convert a savestate object to the filename it represents.

  1875 static const char *savestateobj2filename(lua_State *L, int offset)

  1876 {

  1877   // First we get the metatable of the indicated object

  1878   int result = lua_getmetatable(L, offset);

  1879 

  1880   if (!result)

  1881     luaL_error(L, "object not a savestate object");

  1882 

  1883   // Also check that the type entry is set

  1884   lua_getfield(L, -1, "__metatable");

  1885   if (strcmp(lua_tostring(L, -1), "vba Savestate") != 0)

  1886     luaL_error(L, "object not a savestate object");

  1887   lua_pop(L, 1);

  1888 

  1889   // Now, get the field we want

  1890   lua_getfield(L, -1, "filename");

  1891 

  1892   // Return it

  1893   return lua_tostring(L, -1);

  1894 }

  1895 

  1896 // Helper function for garbage collection.

  1897 static int savestate_gc(lua_State *L)

  1898 {

  1899   // The object we're collecting is on top of the stack

  1900   lua_getmetatable(L, 1);

  1901 

  1902   // Get the filename

  1903   const char *filename;

  1904   lua_getfield(L, -1, "filename");

  1905   filename = lua_tostring(L, -1);

  1906 

  1907   // Delete the file

  1908   remove(filename);

  1909 

  1910   // We exit, and the garbage collector takes care of the rest.

  1911   // Edit: Visual Studio needs a return value anyway, so returns 0.

  1912   return 0;

  1913 }

  1914 

  1915 // object savestate.create(int which = nil)

  1916 //

  1917 //  Creates an object used for savestates.

  1918 //  The object can be associated with a player-accessible savestate

  1919 

  1920 //  ("which" between 1 and 12) or not (which == nil).

  1921 static int savestate_create(lua_State *L)

  1922 {

  1923   int which = -1;

  1924   if (lua_gettop(L) >= 1)

  1925     {

  1926       which = luaL_checkinteger(L, 1);

  1927       if (which < 1 || which > 12)

  1928 	{

  1929 	  luaL_error(L, "invalid player's savestate %d", which);

  1930 	}

  1931     }

  1932 

  1933   char stateName[2048];

  1934 

  1935   if (which > 0)

  1936     {

  1937       // Find an appropriate filename. This is OS specific, unfortunately.

  1938 #if (defined(WIN32) && !defined(SDL))

  1939       CString stateName = winGetSavestateFilename(theApp.gameFilename, which);

  1940 #else

  1941       extern char saveDir[2048];

  1942       extern char filename[2048];

  1943       extern char *sdlGetFilename(char *name);

  1944 

  1945       if (saveDir[0])

  1946 	sprintf(stateName, "%s/%s%d.sgm", saveDir, sdlGetFilename(filename), which);

  1947       else

  1948 	sprintf(stateName, "%s%d.sgm", filename, which);

  1949 #endif

  1950     }

  1951   else

  1952     {

  1953       char *stateNameTemp = tempnam(NULL, "snlua");

  1954       strcpy(stateName, stateNameTemp);

  1955       if (stateNameTemp)

  1956 	free(stateNameTemp);

  1957     }

  1958 

  1959   // Our "object". We don't care about the type, we just need the memory and GC services.

  1960   lua_newuserdata(L, 1);

  1961 

  1962   // The metatable we use, protected from Lua and contains garbage collection info and stuff.

  1963   lua_newtable(L);

  1964 

  1965   // First, we must protect it

  1966   lua_pushstring(L, "vba Savestate");

  1967   lua_setfield(L, -2, "__metatable");

  1968 

  1969   // Now we need to save the file itself.

  1970   lua_pushstring(L, stateName);

  1971   lua_setfield(L, -2, "filename");

  1972 

  1973   // If it's an anonymous savestate, we must delete the file from disk should it be gargage collected

  1974   if (which < 0)

  1975     {

  1976       lua_pushcfunction(L, savestate_gc);

  1977       lua_setfield(L, -2, "__gc");

  1978     }

  1979 

  1980   // Set the metatable

  1981   lua_setmetatable(L, -2);

  1982 

  1983   // Awesome. Return the object

  1984   return 1;

  1985 }

  1986 

  1987 // savestate.save(object state)

  1988 //

  1989 

  1990 //   Saves a state to the given object.

  1991 static int savestate_save(lua_State *L)

  1992 {

  1993   const char *filename = savestateobj2filename(L, 1);

  1994 

  1995   //	printf("saving %s\n", filename);

  1996   // Save states are very expensive. They take time.

  1997   numTries--;

  1998 

  1999   bool8 retvalue = theEmulator.emuWriteState ? theEmulator.emuWriteState(filename) : false;

  2000   if (!retvalue)

  2001     {

  2002       // Uh oh

  2003       luaL_error(L, "savestate failed");

  2004     }

  2005 

  2006   return 0;

  2007 }

  2008 

  2009 // savestate.load(object state)

  2010 //

  2011 

  2012 //   Loads the given state

  2013 static int savestate_load(lua_State *L)

  2014 {

  2015   const char *filename = savestateobj2filename(L, 1);

  2016 

  2017   numTries--;

  2018 

  2019   //	printf("loading %s\n", filename);

  2020   bool8 retvalue = theEmulator.emuReadState ? theEmulator.emuReadState(filename) : false;

  2021   if (!retvalue)

  2022     {

  2023       // Uh oh

  2024       luaL_error(L, "loadstate failed");

  2025     }

  2026 

  2027   return 0;

  2028 }

  2029 

  2030 // int vba.framecount()

  2031 //

  2032 

  2033 //   Gets the frame counter for the movie, or the number of frames since last reset.

  2034 int vba_framecount(lua_State *L)

  2035 {

  2036   if (!VBAMovieActive())

  2037     {

  2038       lua_pushinteger(L, systemCounters.frameCount);

  2039     }

  2040   else

  2041     {

  2042       lua_pushinteger(L, VBAMovieGetFrameCounter());

  2043     }

  2044 

  2045   return 1;

  2046 }

  2047 

  2048 //string movie.getauthor

  2049 //

  2050 

  2051 // returns author info field of .vbm file

  2052 int movie_getauthor(lua_State *L)

  2053 {

  2054   if (!VBAMovieActive())

  2055     {

  2056       //lua_pushnil(L);

  2057       lua_pushstring(L, "");

  2058       return 1;

  2059     }

  2060 

  2061   lua_pushstring(L, VBAMovieGetAuthorInfo().c_str());

  2062   return 1;

  2063 }

  2064 

  2065 //string movie.filename

  2066 int movie_getfilename(lua_State *L)

  2067 {

  2068   if (!VBAMovieActive())

  2069     {

  2070       //lua_pushnil(L);

  2071       lua_pushstring(L, "");

  2072       return 1;

  2073     }

  2074 

  2075   lua_pushstring(L, VBAMovieGetFilename().c_str());

  2076   return 1;

  2077 }

  2078 

  2079 // string movie.mode()

  2080 //

  2081 

  2082 //   "record", "playback" or nil

  2083 int movie_getmode(lua_State *L)

  2084 {

  2085   assert(!VBAMovieLoading());

  2086   if (!VBAMovieActive())

  2087     {

  2088       lua_pushnil(L);

  2089       return 1;

  2090     }

  2091 

  2092   if (VBAMovieRecording())

  2093     lua_pushstring(L, "record");

  2094   else

  2095     lua_pushstring(L, "playback");

  2096   return 1;

  2097 }

  2098 

  2099 static int movie_rerecordcount(lua_State *L)

  2100 {

  2101   if (VBAMovieActive())

  2102     lua_pushinteger(L, VBAMovieGetRerecordCount());

  2103   else

  2104     lua_pushinteger(L, 0);

  2105   return 1;

  2106 }

  2107 

  2108 static int movie_setrerecordcount(lua_State *L)

  2109 {

  2110   if (VBAMovieActive())

  2111     VBAMovieSetRerecordCount(luaL_checkinteger(L, 1));

  2112   return 0;

  2113 }

  2114 

  2115 static int movie_rerecordcounting(lua_State *L)

  2116 {

  2117   if (lua_gettop(L) == 0)

  2118     luaL_error(L, "no parameters specified");

  2119 

  2120   skipRerecords = lua_toboolean(L, 1);

  2121   return 0;

  2122 }

  2123 

  2124 // movie.stop()

  2125 //

  2126 

  2127 //   Stops movie playback/recording. Bombs out if movie is not running.

  2128 static int movie_stop(lua_State *L)

  2129 {

  2130   if (!VBAMovieActive())

  2131     luaL_error(L, "no movie");

  2132 

  2133   VBAMovieStop(false);

  2134   return 0;

  2135 }

  2136 

  2137 #define LUA_SCREEN_WIDTH    256

  2138 #define LUA_SCREEN_HEIGHT   239

  2139 

  2140 // Common code by the gui library: make sure the screen array is ready

  2141 static void gui_prepare(void)

  2142 {

  2143   if (!gui_data)

  2144     gui_data = (uint8 *)malloc(LUA_SCREEN_WIDTH * LUA_SCREEN_HEIGHT * 4);

  2145   if (!gui_used)

  2146     memset(gui_data, 0, LUA_SCREEN_WIDTH * LUA_SCREEN_HEIGHT * 4);

  2147   gui_used = true;

  2148 }

  2149 

  2150 // pixform for lua graphics

  2151 #define BUILD_PIXEL_ARGB8888(A, R, G, B)    (((int)(A) << 24) | ((int)(R) << 16) | ((int)(G) << 8) | (int)(B))

  2152 #define DECOMPOSE_PIXEL_ARGB8888(PIX, A, R, G, B)	\

  2153   {							\

  2154     (A) = ((PIX) >> 24) & 0xff;				\

  2155     (R) = ((PIX) >> 16) & 0xff;				\

  2156     (G) = ((PIX) >> 8) & 0xff;				\

  2157     (B) = (PIX) & 0xff;					\

  2158   }

  2159 #define LUA_BUILD_PIXEL     BUILD_PIXEL_ARGB8888

  2160 #define LUA_DECOMPOSE_PIXEL DECOMPOSE_PIXEL_ARGB8888

  2161 #define LUA_PIXEL_A(PIX) (((PIX) >> 24) & 0xff)

  2162 #define LUA_PIXEL_R(PIX) (((PIX) >> 16) & 0xff)

  2163 #define LUA_PIXEL_G(PIX) (((PIX) >> 8) & 0xff)

  2164 #define LUA_PIXEL_B(PIX) ((PIX) & 0xff)

  2165 

  2166 template<class T>

  2167 static void swap(T &one, T &two)

  2168 {

  2169   T temp = one;

  2170   one = two;

  2171   two = temp;

  2172 }

  2173 

  2174 // write a pixel to buffer

  2175 static inline void blend32(uint32 *dstPixel, uint32 colour)

  2176 {

  2177   uint8 *dst = (uint8 *)dstPixel;

  2178   int	   a, r, g, b;

  2179   LUA_DECOMPOSE_PIXEL(colour, a, r, g, b);

  2180 

  2181   if (a == 255 || dst[3] == 0)

  2182     {

  2183       // direct copy

  2184       *(uint32 *) (dst) = colour;

  2185     }

  2186   else if (a == 0)

  2187     {

  2188       // do not copy

  2189     }

  2190   else

  2191     {

  2192       // alpha-blending

  2193       int a_dst = ((255 - a) * dst[3] + 128) / 255;

  2194       int a_new = a + a_dst;

  2195 

  2196       dst[0] = (uint8) (((dst[0] * a_dst + b * a) + (a_new / 2)) / a_new);

  2197       dst[1] = (uint8) (((dst[1] * a_dst + g * a) + (a_new / 2)) / a_new);

  2198       dst[2] = (uint8) (((dst[2] * a_dst + r * a) + (a_new / 2)) / a_new);

  2199       dst[3] = (uint8) a_new;

  2200     }

  2201 }

  2202 

  2203 // check if a pixel is in the lua canvas

  2204 static inline bool gui_check_boundary(int x, int y)

  2205 {

  2206   return !(x < 0 || x >= LUA_SCREEN_WIDTH || y < 0 || y >= LUA_SCREEN_HEIGHT);

  2207 }

  2208 

  2209 // check if any part of a box is in the lua canvas

  2210 static inline bool gui_checkbox(int x1, int y1, int x2, int y2)

  2211 {

  2212   if ((x1 <  0 && x2 <  0)

  2213       || (x1 >= LUA_SCREEN_WIDTH && x2 >= LUA_SCREEN_WIDTH)

  2214       || (y1 <  0 && y2 <  0)

  2215       || (y1 >= LUA_SCREEN_HEIGHT && y2 >= LUA_SCREEN_HEIGHT))

  2216     return false;

  2217   return true;

  2218 }

  2219 

  2220 // write a pixel to gui_data (do not check boundaries for speedup)

  2221 static inline void gui_drawpixel_fast(int x, int y, uint32 colour)

  2222 {

  2223   //gui_prepare();

  2224   blend32((uint32 *) &gui_data[(y * LUA_SCREEN_WIDTH + x) * 4], colour);

  2225 }

  2226 

  2227 // write a pixel to gui_data (check boundaries)

  2228 static inline void gui_drawpixel_internal(int x, int y, uint32 colour)

  2229 {

  2230   //gui_prepare();

  2231   if (gui_check_boundary(x, y))

  2232     gui_drawpixel_fast(x, y, colour);

  2233 }

  2234 

  2235 // draw a line on gui_data (checks boundaries)

  2236 static void gui_drawline_internal(int x1, int y1, int x2, int y2, bool lastPixel, uint32 colour)

  2237 {

  2238   //gui_prepare();

  2239   // Note: New version of Bresenham's Line Algorithm

  2240   //

  2241   //

  2242   // http://groups.google.co.jp/group/rec.games.roguelike.development/browse_thread/thread/345f4c42c3b25858/29e07a3af3a450e6?show_docid=29e07a3af3a450e6

  2243   int swappedx = 0;

  2244   int swappedy = 0;

  2245 

  2246   int xtemp = x1 - x2;

  2247   int ytemp = y1 - y2;

  2248   if (xtemp == 0 && ytemp == 0)

  2249     {

  2250       gui_drawpixel_internal(x1, y1, colour);

  2251       return;

  2252     }

  2253 

  2254   if (xtemp < 0)

  2255     {

  2256       xtemp	 = -xtemp;

  2257       swappedx = 1;

  2258     }

  2259 

  2260   if (ytemp < 0)

  2261     {

  2262       ytemp	 = -ytemp;

  2263       swappedy = 1;

  2264     }

  2265 

  2266   int delta_x = xtemp << 1;

  2267   int delta_y = ytemp << 1;

  2268 

  2269   signed char ix = x1 > x2 ? 1 : -1;

  2270   signed char iy = y1 > y2 ? 1 : -1;

  2271 

  2272   if (lastPixel)

  2273     gui_drawpixel_internal(x2, y2, colour);

  2274 

  2275   if (delta_x >= delta_y)

  2276     {

  2277       int error = delta_y - (delta_x >> 1);

  2278 

  2279       while (x2 != x1)

  2280 	{

  2281 	  if (error == 0 && !swappedx)

  2282 	    gui_drawpixel_internal(x2 + ix, y2, colour);

  2283 	  if (error >= 0)

  2284 	    {

  2285 	      if (error || (ix > 0))

  2286 		{

  2287 		  y2	  += iy;

  2288 		  error -= delta_x;

  2289 		}

  2290 	    }

  2291 

  2292 	  x2 += ix;

  2293 	  gui_drawpixel_internal(x2, y2, colour);

  2294 	  if (error == 0 && swappedx)

  2295 	    gui_drawpixel_internal(x2, y2 + iy, colour);

  2296 	  error += delta_y;

  2297 	}

  2298     }

  2299   else

  2300     {

  2301       int error = delta_x - (delta_y >> 1);

  2302 

  2303       while (y2 != y1)

  2304 	{

  2305 	  if (error == 0 && !swappedy)

  2306 	    gui_drawpixel_internal(x2, y2 + iy, colour);

  2307 	  if (error >= 0)

  2308 	    {

  2309 	      if (error || (iy > 0))

  2310 		{

  2311 		  x2	  += ix;

  2312 		  error -= delta_y;

  2313 		}

  2314 	    }

  2315 

  2316 	  y2 += iy;

  2317 	  gui_drawpixel_internal(x2, y2, colour);

  2318 	  if (error == 0 && swappedy)

  2319 	    gui_drawpixel_internal(x2 + ix, y2, colour);

  2320 	  error += delta_x;

  2321 	}

  2322     }

  2323 }

  2324 

  2325 // draw a rect on gui_data

  2326 static void gui_drawbox_internal(int x1, int y1, int x2, int y2, uint32 colour)

  2327 {

  2328   if (x1 > x2)

  2329     std::swap(x1, x2);

  2330   if (y1 > y2)

  2331     std::swap(y1, y2);

  2332   if (x1 < 0)

  2333     x1 = -1;

  2334   if (y1 < 0)

  2335     y1 = -1;

  2336   if (x2 >= LUA_SCREEN_WIDTH)

  2337     x2 = LUA_SCREEN_WIDTH;

  2338   if (y2 >= LUA_SCREEN_HEIGHT)

  2339     y2 = LUA_SCREEN_HEIGHT;

  2340 

  2341   if (!gui_checkbox(x1, y1, x2, y2))

  2342     return;

  2343 

  2344   //gui_prepare();

  2345   gui_drawline_internal(x1, y1, x2, y1, true, colour);

  2346   gui_drawline_internal(x1, y2, x2, y2, true, colour);

  2347   gui_drawline_internal(x1, y1, x1, y2, true, colour);

  2348   gui_drawline_internal(x2, y1, x2, y2, true, colour);

  2349 }

  2350 

  2351 // draw a circle on gui_data

  2352 static void gui_drawcircle_internal(int x0, int y0, int radius, uint32 colour)

  2353 {

  2354   //gui_prepare();

  2355   if (radius < 0)

  2356     radius = -radius;

  2357   if (radius == 0)

  2358     return;

  2359   if (radius == 1)

  2360     {

  2361       gui_drawpixel_internal(x0, y0, colour);

  2362       return;

  2363     }

  2364 

  2365   // http://en.wikipedia.org/wiki/Midpoint_circle_algorithm

  2366   int f	  = 1 - radius;

  2367   int ddF_x = 1;

  2368   int ddF_y = -2 * radius;

  2369   int x	  = 0;

  2370   int y	  = radius;

  2371 

  2372   if (!gui_checkbox(x0 - radius, y0 - radius, x0 + radius, y0 + radius))

  2373     return;

  2374 

  2375   gui_drawpixel_internal(x0, y0 + radius, colour);

  2376   gui_drawpixel_internal(x0, y0 - radius, colour);

  2377   gui_drawpixel_internal(x0 + radius, y0, colour);

  2378   gui_drawpixel_internal(x0 - radius, y0, colour);

  2379 

  2380   // same pixel shouldn't be drawed twice,

  2381   // because each pixel has opacity.

  2382   // so now the routine gets ugly.

  2383   while (true)

  2384     {

  2385       assert(ddF_x == 2 * x + 1);

  2386       assert(ddF_y == -2 * y);

  2387       assert(f == x * x + y * y - radius * radius + 2 * x - y + 1);

  2388       if (f >= 0)

  2389 	{

  2390 	  y--;

  2391 	  ddF_y += 2;

  2392 	  f	  += ddF_y;

  2393 	}

  2394 

  2395       x++;

  2396       ddF_x += 2;

  2397       f	  += ddF_x;

  2398       if (x < y)

  2399 	{

  2400 	  gui_drawpixel_internal(x0 + x, y0 + y, colour);

  2401 	  gui_drawpixel_internal(x0 - x, y0 + y, colour);

  2402 	  gui_drawpixel_internal(x0 + x, y0 - y, colour);

  2403 	  gui_drawpixel_internal(x0 - x, y0 - y, colour);

  2404 	  gui_drawpixel_internal(x0 + y, y0 + x, colour);

  2405 	  gui_drawpixel_internal(x0 - y, y0 + x, colour);

  2406 	  gui_drawpixel_internal(x0 + y, y0 - x, colour);

  2407 	  gui_drawpixel_internal(x0 - y, y0 - x, colour);

  2408 	}

  2409       else if (x == y)

  2410 	{

  2411 	  gui_drawpixel_internal(x0 + x, y0 + y, colour);

  2412 	  gui_drawpixel_internal(x0 - x, y0 + y, colour);

  2413 	  gui_drawpixel_internal(x0 + x, y0 - y, colour);

  2414 	  gui_drawpixel_internal(x0 - x, y0 - y, colour);

  2415 	  break;

  2416 	}

  2417       else

  2418 	break;

  2419     }

  2420 }

  2421 

  2422 // draw fill rect on gui_data

  2423 static void gui_fillbox_internal(int x1, int y1, int x2, int y2, uint32 colour)

  2424 {

  2425   if (x1 > x2)

  2426     std::swap(x1, x2);

  2427   if (y1 > y2)

  2428     std::swap(y1, y2);

  2429   if (x1 < 0)

  2430     x1 = 0;

  2431   if (y1 < 0)

  2432     y1 = 0;

  2433   if (x2 >= LUA_SCREEN_WIDTH)

  2434     x2 = LUA_SCREEN_WIDTH - 1;

  2435   if (y2 >= LUA_SCREEN_HEIGHT)

  2436     y2 = LUA_SCREEN_HEIGHT - 1;

  2437 

  2438   //gui_prepare();

  2439   int ix, iy;

  2440   for (iy = y1; iy <= y2; iy++)

  2441     {

  2442       for (ix = x1; ix <= x2; ix++)

  2443 	{

  2444 	  gui_drawpixel_fast(ix, iy, colour);

  2445 	}

  2446     }

  2447 }

  2448 

  2449 // fill a circle on gui_data

  2450 static void gui_fillcircle_internal(int x0, int y0, int radius, uint32 colour)

  2451 {

  2452   //gui_prepare();

  2453   if (radius < 0)

  2454     radius = -radius;

  2455   if (radius == 0)

  2456     return;

  2457   if (radius == 1)

  2458     {

  2459       gui_drawpixel_internal(x0, y0, colour);

  2460       return;

  2461     }

  2462 

  2463   // http://en.wikipedia.org/wiki/Midpoint_circle_algorithm

  2464   int f	  = 1 - radius;

  2465   int ddF_x = 1;

  2466   int ddF_y = -2 * radius;

  2467   int x	  = 0;

  2468   int y	  = radius;

  2469 

  2470   if (!gui_checkbox(x0 - radius, y0 - radius, x0 + radius, y0 + radius))

  2471     return;

  2472 

  2473   gui_drawline_internal(x0, y0 - radius, x0, y0 + radius, true, colour);

  2474 

  2475   while (true)

  2476     {

  2477       assert(ddF_x == 2 * x + 1);

  2478       assert(ddF_y == -2 * y);

  2479       assert(f == x * x + y * y - radius * radius + 2 * x - y + 1);

  2480       if (f >= 0)

  2481 	{

  2482 	  y--;

  2483 	  ddF_y += 2;

  2484 	  f	  += ddF_y;

  2485 	}

  2486 

  2487       x++;

  2488       ddF_x += 2;

  2489       f	  += ddF_x;

  2490 

  2491       if (x < y)

  2492 	{

  2493 	  gui_drawline_internal(x0 + x, y0 - y, x0 + x, y0 + y, true, colour);

  2494 	  gui_drawline_internal(x0 - x, y0 - y, x0 - x, y0 + y, true, colour);

  2495 	  if (f >= 0)

  2496 	    {

  2497 	      gui_drawline_internal(x0 + y, y0 - x, x0 + y, y0 + x, true, colour);

  2498 	      gui_drawline_internal(x0 - y, y0 - x, x0 - y, y0 + x, true, colour);

  2499 	    }

  2500 	}

  2501       else if (x == y)

  2502 	{

  2503 	  gui_drawline_internal(x0 + x, y0 - y, x0 + x, y0 + y, true, colour);

  2504 	  gui_drawline_internal(x0 - x, y0 - y, x0 - x, y0 + y, true, colour);

  2505 	  break;

  2506 	}

  2507       else

  2508 	break;

  2509     }

  2510 }

  2511 

  2512 // Helper for a simple hex parser

  2513 static int hex2int(lua_State *L, char c)

  2514 {

  2515   if (c >= '0' && c <= '9')

  2516     return c - '0';

  2517   if (c >= 'a' && c <= 'f')

  2518     return c - 'a' + 10;

  2519   if (c >= 'A' && c <= 'F')

  2520     return c - 'A' + 10;

  2521   return luaL_error(L, "invalid hex in colour");

  2522 }

  2523 

  2524 static const struct ColorMapping

  2525 {

  2526   const char *name;

  2527   int			value;

  2528 }

  2529   s_colorMapping[] =

  2530     {

  2531       { "white",		0xFFFFFFFF		  },

  2532       { "black",		0x000000FF		  },

  2533       { "clear",		0x00000000		  },

  2534       { "gray",		0x7F7F7FFF		  },

  2535       { "grey",		0x7F7F7FFF		  },

  2536       { "red",		0xFF0000FF		  },

  2537       { "orange",		0xFF7F00FF		  },

  2538       { "yellow",		0xFFFF00FF		  },

  2539       { "chartreuse", 0x7FFF00FF		  },

  2540       { "green",		0x00FF00FF		  },

  2541       { "teal",		0x00FF7FFF		  },

  2542       { "cyan",		0x00FFFFFF		  },

  2543       { "blue",		0x0000FFFF		  },

  2544       { "purple",		0x7F00FFFF		  },

  2545       { "magenta",	0xFF00FFFF		  },

  2546     };

  2547 

  2548 /**

  2549  * Converts an integer or a string on the stack at the given

  2550  * offset to a RGB32 colour. Several encodings are supported.

  2551  * The user may construct their own RGB value, given a simple colour name,

  2552  * or an HTML-style "#09abcd" colour. 16 bit reduction doesn't occur at this time.

  2553  */

  2554 static inline bool str2colour(uint32 *colour, lua_State *L, const char *str)

  2555 {

  2556   if (str[0] == '#')

  2557     {

  2558       int color;

  2559       sscanf(str + 1, "%X", &color);

  2560 

  2561       int len		= strlen(str + 1);

  2562       int missing = max(0, 8 - len);

  2563       color <<= missing << 2;

  2564       if (missing >= 2)

  2565 	color |= 0xFF;

  2566       *colour = color;

  2567       return true;

  2568     }

  2569   else

  2570     {

  2571       if (!strnicmp(str, "rand", 4))

  2572 	{

  2573 	  *colour = gen_rand32() | 0xFF; //((rand()*255/RAND_MAX) << 8) | ((rand()*255/RAND_MAX) << 16) |

  2574 	  // ((rand()*255/RAND_MAX) << 24) | 0xFF;

  2575 	  return true;

  2576 	}

  2577 

  2578       for (int i = 0; i < sizeof(s_colorMapping) / sizeof(*s_colorMapping); i++)

  2579 	{

  2580 	  if (!stricmp(str, s_colorMapping[i].name))

  2581 	    {

  2582 	      *colour = s_colorMapping[i].value;

  2583 	      return true;

  2584 	    }

  2585 	}

  2586     }

  2587 

  2588   return false;

  2589 }

  2590 

  2591 static inline uint32 gui_getcolour_wrapped(lua_State *L, int offset, bool hasDefaultValue, uint32 defaultColour)

  2592 {

  2593   switch (lua_type(L, offset))

  2594     {

  2595     case LUA_TSTRING:

  2596       {

  2597 	const char *str = lua_tostring(L, offset);

  2598 	uint32		colour;

  2599 

  2600 	if (str2colour(&colour, L, str))

  2601 	  return colour;

  2602 	else

  2603 	  {

  2604 	    if (hasDefaultValue)

  2605 	      return defaultColour;

  2606 	    else

  2607 	      return luaL_error(L, "unknown colour %s", str);

  2608 	  }

  2609       }

  2610 

  2611     case LUA_TNUMBER:

  2612       {

  2613 	uint32 colour = (uint32) lua_tointeger(L, offset);

  2614 	return colour;

  2615       }

  2616 

  2617     case LUA_TTABLE:

  2618       {

  2619 	int color = 0xFF;

  2620 	lua_pushnil(L); // first key

  2621 	int	 keyIndex	= lua_gettop(L);

  2622 	int	 valueIndex = keyIndex + 1;

  2623 	bool first		= true;

  2624 	while (lua_next(L, offset))

  2625 	  {

  2626 	    bool keyIsString = (lua_type(L, keyIndex) == LUA_TSTRING);

  2627 	    bool keyIsNumber = (lua_type(L, keyIndex) == LUA_TNUMBER);

  2628 	    int	 key		 = keyIsString ? tolower(*lua_tostring(L, keyIndex)) : (keyIsNumber ? lua_tointeger(L, keyIndex) : 0);

  2629 	    int	 value		 = lua_tointeger(L, valueIndex);

  2630 	    if (value < 0) value = 0;

  2631 	    if (value > 255) value = 255;

  2632 	    switch (key)

  2633 	      {

  2634 	      case 1:

  2635 	      case 'r':

  2636 		color |= value << 24; break;

  2637 	      case 2:

  2638 	      case 'g':

  2639 		color |= value << 16; break;

  2640 	      case 3:

  2641 	      case 'b':

  2642 		color |= value << 8; break;

  2643 	      case 4:

  2644 	      case 'a':

  2645 		color = (color & ~0xFF) | value; break;

  2646 	      }

  2647 	    lua_pop(L, 1);

  2648 	  }

  2649 	return color;

  2650       }   break;

  2651 

  2652     case LUA_TFUNCTION:

  2653       luaL_error(L, "invalid colour"); // NYI

  2654       return 0;

  2655 

  2656     default:

  2657       if (hasDefaultValue)

  2658 	return defaultColour;

  2659       else

  2660 	return luaL_error(L, "invalid colour");

  2661     }

  2662 }

  2663 

  2664 static uint32 gui_getcolour(lua_State *L, int offset)

  2665 {

  2666   uint32 colour;

  2667   int	   a, r, g, b;

  2668 

  2669   colour = gui_getcolour_wrapped(L, offset, false, 0);

  2670   a	   = ((colour & 0xff) * transparencyModifier) / 255;

  2671   if (a > 255)

  2672     a = 255;

  2673   b = (colour >> 8) & 0xff;

  2674   g = (colour >> 16) & 0xff;

  2675   r = (colour >> 24) & 0xff;

  2676   return LUA_BUILD_PIXEL(a, r, g, b);

  2677 }

  2678 

  2679 static uint32 gui_optcolour(lua_State *L, int offset, uint32 defaultColour)

  2680 {

  2681   uint32 colour;

  2682   int	   a, r, g, b;

  2683   uint8  defA, defB, defG, defR;

  2684 

  2685   LUA_DECOMPOSE_PIXEL(defaultColour, defA, defR, defG, defB);

  2686   defaultColour = (defR << 24) | (defG << 16) | (defB << 8) | defA;

  2687 

  2688   colour = gui_getcolour_wrapped(L, offset, true, defaultColour);

  2689   a	   = ((colour & 0xff) * transparencyModifier) / 255;

  2690   if (a > 255)

  2691     a = 255;

  2692   b = (colour >> 8) & 0xff;

  2693   g = (colour >> 16) & 0xff;

  2694   r = (colour >> 24) & 0xff;

  2695   return LUA_BUILD_PIXEL(a, r, g, b);

  2696 }

  2697 

  2698 // gui.drawpixel(x,y,colour)

  2699 static int gui_drawpixel(lua_State *L)

  2700 {

  2701   int x = luaL_checkinteger(L, 1);

  2702   int y = luaL_checkinteger(L, 2);

  2703 

  2704   uint32 colour = gui_getcolour(L, 3);

  2705 

  2706   //	if (!gui_check_boundary(x, y))

  2707   //		luaL_error(L,"bad coordinates");

  2708   gui_prepare();

  2709 

  2710   gui_drawpixel_internal(x, y, colour);

  2711 

  2712   return 0;

  2713 }

  2714 

  2715 // gui.drawline(x1,y1,x2,y2,color,skipFirst)

  2716 static int gui_drawline(lua_State *L)

  2717 {

  2718   int	   x1, y1, x2, y2;

  2719   uint32 color;

  2720   x1	  = luaL_checkinteger(L, 1);

  2721   y1	  = luaL_checkinteger(L, 2);

  2722   x2	  = luaL_checkinteger(L, 3);

  2723   y2	  = luaL_checkinteger(L, 4);

  2724   color = gui_optcolour(L, 5, LUA_BUILD_PIXEL(255, 255, 255, 255));

  2725   int skipFirst = lua_toboolean(L, 6);

  2726 

  2727   gui_prepare();

  2728 

  2729   gui_drawline_internal(x2, y2, x1, y1, !skipFirst, color);

  2730 

  2731   return 0;

  2732 }

  2733 

  2734 // gui.drawbox(x1, y1, x2, y2, fillcolor, outlinecolor)

  2735 static int gui_drawbox(lua_State *L)

  2736 {

  2737   int	   x1, y1, x2, y2;

  2738   uint32 fillcolor;

  2739   uint32 outlinecolor;

  2740 

  2741   x1 = luaL_checkinteger(L, 1);

  2742   y1 = luaL_checkinteger(L, 2);

  2743   x2 = luaL_checkinteger(L, 3);

  2744   y2 = luaL_checkinteger(L, 4);

  2745   fillcolor	 = gui_optcolour(L, 5, LUA_BUILD_PIXEL(63, 255, 255, 255));

  2746   outlinecolor = gui_optcolour(L, 6, LUA_BUILD_PIXEL(255, LUA_PIXEL_R(fillcolor), LUA_PIXEL_G(fillcolor), LUA_PIXEL_B(fillcolor)));

  2747 

  2748   if (x1 > x2)

  2749     std::swap(x1, x2);

  2750   if (y1 > y2)

  2751     std::swap(y1, y2);

  2752 

  2753   gui_prepare();

  2754 

  2755   gui_drawbox_internal(x1, y1, x2, y2, outlinecolor);

  2756   if ((x2 - x1) >= 2 && (y2 - y1) >= 2)

  2757     gui_fillbox_internal(x1 + 1, y1 + 1, x2 - 1, y2 - 1, fillcolor);

  2758 

  2759   return 0;

  2760 }

  2761 

  2762 // gui.drawcircle(x0, y0, radius, colour)

  2763 static int gui_drawcircle(lua_State *L)

  2764 {

  2765   int	   x, y, r;

  2766   uint32 colour;

  2767 

  2768   x	   = luaL_checkinteger(L, 1);

  2769   y	   = luaL_checkinteger(L, 2);

  2770   r	   = luaL_checkinteger(L, 3);

  2771   colour = gui_getcolour(L, 4);

  2772 

  2773   gui_prepare();

  2774 

  2775   gui_drawcircle_internal(x, y, r, colour);

  2776 

  2777   return 0;

  2778 }

  2779 

  2780 // gui.fillbox(x1, y1, x2, y2, colour)

  2781 static int gui_fillbox(lua_State *L)

  2782 {

  2783   int	   x1, y1, x2, y2;

  2784   uint32 colour;

  2785 

  2786   x1	   = luaL_checkinteger(L, 1);

  2787   y1	   = luaL_checkinteger(L, 2);

  2788   x2	   = luaL_checkinteger(L, 3);

  2789   y2	   = luaL_checkinteger(L, 4);

  2790   colour = gui_getcolour(L, 5);

  2791 

  2792   //	if (!gui_check_boundary(x1, y1))

  2793   //		luaL_error(L,"bad coordinates");

  2794   //

  2795   //	if (!gui_check_boundary(x2, y2))

  2796   //		luaL_error(L,"bad coordinates");

  2797   gui_prepare();

  2798 

  2799   if (!gui_checkbox(x1, y1, x2, y2))

  2800     return 0;

  2801 

  2802   gui_fillbox_internal(x1, y1, x2, y2, colour);

  2803 

  2804   return 0;

  2805 }

  2806 

  2807 // gui.fillcircle(x0, y0, radius, colour)

  2808 static int gui_fillcircle(lua_State *L)

  2809 {

  2810   int	   x, y, r;

  2811   uint32 colour;

  2812 

  2813   x	   = luaL_checkinteger(L, 1);

  2814   y	   = luaL_checkinteger(L, 2);

  2815   r	   = luaL_checkinteger(L, 3);

  2816   colour = gui_getcolour(L, 4);

  2817 

  2818   gui_prepare();

  2819 

  2820   gui_fillcircle_internal(x, y, r, colour);

  2821 

  2822   return 0;

  2823 }

  2824 

  2825 static int gui_getpixel(lua_State *L)

  2826 {

  2827   int x = luaL_checkinteger(L, 1);

  2828   int y = luaL_checkinteger(L, 2);

  2829 

  2830   int pixWidth   = 240, pixHeight = 160;

  2831   int scrWidth   = 240, scrHeight = 160;

  2832   int scrOffsetX = 0, scrOffsetY = 0;

  2833   int pitch;

  2834   if (!systemIsRunningGBA())

  2835     {

  2836       if (gbBorderOn)

  2837 	{

  2838 	  pixWidth   = 256, pixHeight = 224;

  2839 	  scrOffsetX = 48, scrOffsetY = 40;

  2840 	}

  2841       else

  2842 	{

  2843 	  pixWidth = 160, pixHeight = 144;

  2844 	}

  2845       scrWidth = 160, scrHeight = 144;

  2846     }

  2847   pitch = pixWidth * (systemColorDepth / 8) + (systemColorDepth == 24 ? 0 : 4);

  2848   scrOffsetY++; // don't know why it's needed

  2849 

  2850   if (!(x >= 0 && y >= 0 && x < scrWidth && y < scrHeight) /*!gui_check_boundary(x,y)*/)

  2851     {

  2852       lua_pushinteger(L, 0);

  2853       lua_pushinteger(L, 0);

  2854       lua_pushinteger(L, 0);

  2855     }

  2856   else

  2857     {

  2858       switch (systemColorDepth)

  2859 	{

  2860 	case 16:

  2861 	  {

  2862 	    uint16 *screen	 = (uint16 *) (&pix[scrOffsetY * pitch + scrOffsetX * 2]);

  2863 	    uint16	pixColor = screen[y * pitch / 2 + x];

  2864 	    lua_pushinteger(L, (pixColor >> 8) & 0xF8); // red

  2865 	    lua_pushinteger(L, (pixColor >> 3) & 0xFC); // green

  2866 	    lua_pushinteger(L, (pixColor << 3) & 0xF8); // blue

  2867 	  }

  2868 	  break;

  2869 	case 24:

  2870 	  {

  2871 	    uint8 *screen = &pix[scrOffsetY * pitch + scrOffsetX * 3];

  2872 	    lua_pushinteger(L, screen[y * pitch + x * 3 + 2]); // red

  2873 	    lua_pushinteger(L, screen[y * pitch + x * 3 + 1]); // green

  2874 	    lua_pushinteger(L, screen[y * pitch + x * 3 + 0]); // blue

  2875 	  }

  2876 	  break;

  2877 	case 32:

  2878 	  {

  2879 	    uint8 *screen = &pix[scrOffsetY * pitch + scrOffsetX * 4];

  2880 	    lua_pushinteger(L, screen[y * pitch + x * 4 + 2]); // red

  2881 	    lua_pushinteger(L, screen[y * pitch + x * 4 + 1]); // green

  2882 	    lua_pushinteger(L, screen[y * pitch + x * 4 + 0]); // blue

  2883 	  }

  2884 	  break;

  2885 	default:

  2886 	  lua_pushinteger(L, 0);

  2887 	  lua_pushinteger(L, 0);

  2888 	  lua_pushinteger(L, 0);

  2889 	  break;

  2890 	}

  2891     }

  2892   return 3;

  2893 }

  2894 

  2895 static int gui_parsecolor(lua_State *L)

  2896 {

  2897   int	   r, g, b, a;

  2898   uint32 color = gui_getcolour(L, 1);

  2899   LUA_DECOMPOSE_PIXEL(color, a, r, g, b);

  2900   lua_pushinteger(L, r);

  2901   lua_pushinteger(L, g);

  2902   lua_pushinteger(L, b);

  2903   lua_pushinteger(L, a);

  2904   return 4;

  2905 }

  2906 

  2907 // gui.gdscreenshot()

  2908 //

  2909 //  Returns a screen shot as a string in gd's v1 file format.

  2910 //  This allows us to make screen shots available without gd installed locally.

  2911 //  Users can also just grab pixels via substring selection.

  2912 //

  2913 //  I think...  Does lua support grabbing byte values from a string? // yes, string.byte(str,offset)

  2914 //  Well, either way, just install gd and do what you like with it.

  2915 //  It really is easier that way.

  2916 

  2917 // example: gd.createFromGdStr(gui.gdscreenshot()):png("outputimage.png")

  2918 static int gui_gdscreenshot(lua_State *L)

  2919 {

  2920   int xofs = 0, yofs = 0, ppl = 240, width = 240, height = 160;

  2921   if (!systemIsRunningGBA())

  2922     {

  2923       if (gbBorderOn)

  2924 	xofs = 48, yofs = 40, ppl = 256;

  2925       else

  2926 	ppl = 160;

  2927       width = 160, height = 144;

  2928     }

  2929 

  2930   yofs++;

  2931 

  2932   //int pitch = (((ppl * systemColorDepth + 7)>>3)+3)&~3;

  2933   int	   pitch  = ppl * (systemColorDepth / 8) + (systemColorDepth == 24 ? 0 : 4);

  2934   uint8 *screen = &pix[yofs * pitch + xofs * (systemColorDepth / 8)];

  2935 

  2936   int	  size = 11 + width * height * 4;

  2937   char *str  = new char[size + 1];

  2938   str[size] = 0;

  2939 

  2940   unsigned char *ptr = (unsigned char *)str;

  2941 

  2942   // GD format header for truecolor image (11 bytes)

  2943   *ptr++ = (65534 >> 8) & 0xFF;

  2944   *ptr++ = (65534) & 0xFF;

  2945   *ptr++ = (width >> 8) & 0xFF;

  2946   *ptr++ = (width) & 0xFF;

  2947   *ptr++ = (height >> 8) & 0xFF;

  2948   *ptr++ = (height) & 0xFF;

  2949   *ptr++ = 1;

  2950   *ptr++ = 255;

  2951   *ptr++ = 255;

  2952   *ptr++ = 255;

  2953   *ptr++ = 255;

  2954 

  2955   GetColorFunc getColor;

  2956   getColorIOFunc(systemColorDepth, &getColor, NULL);

  2957 

  2958   int x, y;

  2959   for (y = 0; y < height; y++)

  2960     {

  2961       uint8 *s = &screen[y * pitch];

  2962       for (x = 0; x < width; x++, s += systemColorDepth / 8)

  2963 	{

  2964 	  uint8 r, g, b;

  2965 	  getColor(s, &r, &g, &b);

  2966 

  2967 	  *ptr++ = 0;

  2968 	  *ptr++ = r;

  2969 	  *ptr++ = g;

  2970 	  *ptr++ = b;

  2971 	}

  2972     }

  2973 

  2974   lua_pushlstring(L, str, size);

  2975   delete[] str;

  2976   return 1;

  2977 }

  2978 

  2979 // gui.opacity(number alphaValue)

  2980 // sets the transparency of subsequent draw calls

  2981 // 0.0 is completely transparent, 1.0 is completely opaque

  2982 // non-integer values are supported and meaningful, as are values greater than 1.0

  2983 // it is not necessary to use this function to get transparency (or the less-recommended gui.transparency() either),

  2984 // because you can provide an alpha value in the color argument of each draw call.

  2985 

  2986 // however, it can be convenient to be able to globally modify the drawing transparency

  2987 static int gui_setopacity(lua_State *L)

  2988 {

  2989   double opacF = luaL_checknumber(L, 1);

  2990   transparencyModifier = (int)(opacF * 255);

  2991   if (transparencyModifier < 0)

  2992     transparencyModifier = 0;

  2993   return 0;

  2994 }

  2995 

  2996 // gui.transparency(int strength)

  2997 //

  2998 

  2999 //  0 = solid,

  3000 static int gui_transparency(lua_State *L)

  3001 {

  3002   double trans = luaL_checknumber(L, 1);

  3003   transparencyModifier = (int)((4.0 - trans) / 4.0 * 255);

  3004   if (transparencyModifier < 0)

  3005     transparencyModifier = 0;

  3006   return 0;

  3007 }

  3008 

  3009 static const uint32 Small_Font_Data[] =

  3010   {

  3011     0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, // 32

  3012     0x00000000, 0x00000300, 0x00000400, 0x00000500, 0x00000000, 0x00000700, 0x00000000, // 33	!

  3013     0x00000000, 0x00040002, 0x00050003, 0x00000000, 0x00000000, 0x00000000, 0x00000000, // 34	"

  3014     0x00000000, 0x00040002, 0x00050403, 0x00060004, 0x00070605, 0x00080006, 0x00000000, // 35	#

  3015     0x00000000, 0x00040300, 0x00000403, 0x00000500, 0x00070600, 0x00000706, 0x00000000, // 36	$

  3016     0x00000000, 0x00000002, 0x00050000, 0x00000500, 0x00000005, 0x00080000, 0x00000000, // 37	%

  3017     0x00000000, 0x00000300, 0x00050003, 0x00000500, 0x00070005, 0x00080700, 0x00000000, // 38	&

  3018     0x00000000, 0x00000300, 0x00000400, 0x00000000, 0x00000000, 0x00000000, 0x00000000, // 39	'

  3019     0x00000000, 0x00000300, 0x00000003, 0x00000004, 0x00000005, 0x00000700, 0x00000000, // 40	(

  3020     0x00000000, 0x00000300, 0x00050000, 0x00060000, 0x00070000, 0x00000700, 0x00000000, // 41	)

  3021     0x00000000, 0x00000000, 0x00000400, 0x00060504, 0x00000600, 0x00080006, 0x00000000, // 42	*

  3022     0x00000000, 0x00000000, 0x00000400, 0x00060504, 0x00000600, 0x00000000, 0x00000000, // 43	+

  3023     0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000600, 0x00000700, 0x00000007, // 44	,

  3024     0x00000000, 0x00000000, 0x00000000, 0x00060504, 0x00000000, 0x00000000, 0x00000000, // 45	-

  3025     0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000700, 0x00000000, // 46	.

  3026     0x00030000, 0x00040000, 0x00000400, 0x00000500, 0x00000005, 0x00000006, 0x00000000, // 47	/

  3027     0x00000000, 0x00000300, 0x00050003, 0x00060004, 0x00070005, 0x00000700, 0x00000000, // 48	0

  3028     0x00000000, 0x00000300, 0x00000403, 0x00000500, 0x00000600, 0x00000700, 0x00000000, // 49	1

  3029     0x00000000, 0x00000302, 0x00050000, 0x00000500, 0x00000005, 0x00080706, 0x00000000, // 50	2

  3030     0x00000000, 0x00000302, 0x00050000, 0x00000504, 0x00070000, 0x00000706, 0x00000000, // 51	3

  3031     0x00000000, 0x00000300, 0x00000003, 0x00060004, 0x00070605, 0x00080000, 0x00000000, // 52	4

  3032     0x00000000, 0x00040302, 0x00000003, 0x00000504, 0x00070000, 0x00000706, 0x00000000, // 53	5

  3033     0x00000000, 0x00000300, 0x00000003, 0x00000504, 0x00070005, 0x00000700, 0x00000000, // 54	6

  3034     0x00000000, 0x00040302, 0x00050000, 0x00000500, 0x00000600, 0x00000700, 0x00000000, // 55	7

  3035     0x00000000, 0x00000300, 0x00050003, 0x00000500, 0x00070005, 0x00000700, 0x00000000, // 56	8

  3036     0x00000000, 0x00000300, 0x00050003, 0x00060500, 0x00070000, 0x00000700, 0x00000000, // 57	9

  3037     0x00000000, 0x00000000, 0x00000400, 0x00000000, 0x00000000, 0x00000700, 0x00000000, // 58	:

  3038     0x00000000, 0x00000000, 0x00000000, 0x00000500, 0x00000000, 0x00000700, 0x00000007, // 59	;

  3039     0x00000000, 0x00040000, 0x00000400, 0x00000004, 0x00000600, 0x00080000, 0x00000000, // 60	<

  3040     0x00000000, 0x00000000, 0x00050403, 0x00000000, 0x00070605, 0x00000000, 0x00000000, // 61	=

  3041     0x00000000, 0x00000002, 0x00000400, 0x00060000, 0x00000600, 0x00000006, 0x00000000, // 62	>

  3042     0x00000000, 0x00000302, 0x00050000, 0x00000500, 0x00000000, 0x00000700, 0x00000000, // 63	?

  3043     0x00000000, 0x00000300, 0x00050400, 0x00060004, 0x00070600, 0x00000000, 0x00000000, // 64	@

  3044     0x00000000, 0x00000300, 0x00050003, 0x00060504, 0x00070005, 0x00080006, 0x00000000, // 65	A

  3045     0x00000000, 0x00000302, 0x00050003, 0x00000504, 0x00070005, 0x00000706, 0x00000000, // 66	B

  3046     0x00000000, 0x00040300, 0x00000003, 0x00000004, 0x00000005, 0x00080700, 0x00000000, // 67	C

  3047     0x00000000, 0x00000302, 0x00050003, 0x00060004, 0x00070005, 0x00000706, 0x00000000, // 68	D

  3048     0x00000000, 0x00040302, 0x00000003, 0x00000504, 0x00000005, 0x00080706, 0x00000000, // 69	E

  3049     0x00000000, 0x00040302, 0x00000003, 0x00000504, 0x00000005, 0x00000006, 0x00000000, // 70	F

  3050     0x00000000, 0x00040300, 0x00000003, 0x00060004, 0x00070005, 0x00080700, 0x00000000, // 71	G

  3051     0x00000000, 0x00040002, 0x00050003, 0x00060504, 0x00070005, 0x00080006, 0x00000000, // 72	H

  3052     0x00000000, 0x00000300, 0x00000400, 0x00000500, 0x00000600, 0x00000700, 0x00000000, // 73	I

  3053     0x00000000, 0x00040000, 0x00050000, 0x00060000, 0x00070005, 0x00000700, 0x00000000, // 74	J

  3054     0x00000000, 0x00040002, 0x00050003, 0x00000504, 0x00070005, 0x00080006, 0x00000000, // 75	K

  3055     0x00000000, 0x00000002, 0x00000003, 0x00000004, 0x00000005, 0x00080706, 0x00000000, // 76	l

  3056     0x00000000, 0x00040002, 0x00050403, 0x00060004, 0x00070005, 0x00080006, 0x00000000, // 77	M

  3057     0x00000000, 0x00000302, 0x00050003, 0x00060004, 0x00070005, 0x00080006, 0x00000000, // 78	N

  3058     0x00000000, 0x00040302, 0x00050003, 0x00060004, 0x00070005, 0x00080706, 0x00000000, // 79	O

  3059     0x00000000, 0x00000302, 0x00050003, 0x00000504, 0x00000005, 0x00000006, 0x00000000, // 80	P

  3060     0x00000000, 0x00040302, 0x00050003, 0x00060004, 0x00070005, 0x00080706, 0x00090000, // 81	Q

  3061     0x00000000, 0x00000302, 0x00050003, 0x00000504, 0x00070005, 0x00080006, 0x00000000, // 82	R

  3062     0x00000000, 0x00040300, 0x00000003, 0x00000500, 0x00070000, 0x00000706, 0x00000000, // 83	S

  3063     0x00000000, 0x00040302, 0x00000400, 0x00000500, 0x00000600, 0x00000700, 0x00000000, // 84	T

  3064     0x00000000, 0x00040002, 0x00050003, 0x00060004, 0x00070005, 0x00080706, 0x00000000, // 85	U

  3065     0x00000000, 0x00040002, 0x00050003, 0x00060004, 0x00000600, 0x00000700, 0x00000000, // 86	V

  3066     0x00000000, 0x00040002, 0x00050003, 0x00060004, 0x00070605, 0x00080006, 0x00000000, // 87	W

  3067     0x00000000, 0x00040002, 0x00050003, 0x00000500, 0x00070005, 0x00080006, 0x00000000, // 88	X

  3068     0x00000000, 0x00040002, 0x00050003, 0x00000500, 0x00000600, 0x00000700, 0x00000000, // 89	Y

  3069     0x00000000, 0x00040302, 0x00050000, 0x00000500, 0x00000005, 0x00080706, 0x00000000, // 90	Z

  3070     0x00000000, 0x00040300, 0x00000400, 0x00000500, 0x00000600, 0x00080700, 0x00000000, // 91	[

  3071     0x00000000, 0x00000002, 0x00000400, 0x00000500, 0x00070000, 0x00080000, 0x00000000, // 92	'\'

  3072     0x00000000, 0x00000302, 0x00000400, 0x00000500, 0x00000600, 0x00000706, 0x00000000, // 93	]

  3073     0x00000000, 0x00000300, 0x00050003, 0x00000000, 0x00000000, 0x00000000, 0x00000000, // 94	^

  3074     0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00080706, 0x00000000, // 95	_

  3075     0x00000000, 0x00000002, 0x00000400, 0x00000000, 0x00000000, 0x00000000, 0x00000000, // 96	`

  3076     0x00000000, 0x00000000, 0x00050400, 0x00060004, 0x00070005, 0x00080700, 0x00000000, // 97	a

  3077     0x00000000, 0x00000002, 0x00000003, 0x00000504, 0x00070005, 0x00000706, 0x00000000, // 98	b

  3078     0x00000000, 0x00000000, 0x00050400, 0x00000004, 0x00000005, 0x00080700, 0x00000000, // 99	c

  3079     0x00000000, 0x00040000, 0x00050000, 0x00060500, 0x00070005, 0x00080700, 0x00000000, // 100	d

  3080     0x00000000, 0x00000000, 0x00050400, 0x00060504, 0x00000005, 0x00080700, 0x00000000, // 101	e

  3081     0x00000000, 0x00040300, 0x00000003, 0x00000504, 0x00000005, 0x00000006, 0x00000000, // 102	f

  3082     0x00000000, 0x00000000, 0x00050400, 0x00060004, 0x00070600, 0x00080000, 0x00000807, // 103	g

  3083     0x00000000, 0x00000002, 0x00000003, 0x00000504, 0x00070005, 0x00080006, 0x00000000, // 104	h

  3084     0x00000000, 0x00000300, 0x00000000, 0x00000500, 0x00000600, 0x00000700, 0x00000000, // 105	i

  3085     0x00000000, 0x00000300, 0x00000000, 0x00000500, 0x00000600, 0x00000700, 0x00000007, // 106	j

  3086     0x00000000, 0x00000002, 0x00000003, 0x00060004, 0x00000605, 0x00080006, 0x00000000, // 107	k

  3087     0x00000000, 0x00000300, 0x00000400, 0x00000500, 0x00000600, 0x00080000, 0x00000000, // 108	l

  3088     0x00000000, 0x00000000, 0x00050003, 0x00060504, 0x00070005, 0x00080006, 0x00000000, // 109	m

  3089     0x00000000, 0x00000000, 0x00000403, 0x00060004, 0x00070005, 0x00080006, 0x00000000, // 110	n

  3090     0x00000000, 0x00000000, 0x00000400, 0x00060004, 0x00070005, 0x00000700, 0x00000000, // 111	o

  3091     0x00000000, 0x00000000, 0x00000400, 0x00060004, 0x00000605, 0x00000006, 0x00000007, // 112	p

  3092     0x00000000, 0x00000000, 0x00000400, 0x00060004, 0x00070600, 0x00080000, 0x00090000, // 113	q

  3093     0x00000000, 0x00000000, 0x00050003, 0x00000504, 0x00000005, 0x00000006, 0x00000000, // 114	r

  3094     0x00000000, 0x00000000, 0x00050400, 0x00000004, 0x00070600, 0x00000706, 0x00000000, // 115	s

  3095     0x00000000, 0x00000300, 0x00050403, 0x00000500, 0x00000600, 0x00080000, 0x00000000, // 116	t

  3096     0x00000000, 0x00000000, 0x00050003, 0x00060004, 0x00070005, 0x00080700, 0x00000000, // 117	u

  3097     0x00000000, 0x00000000, 0x00050003, 0x00060004, 0x00070005, 0x00000700, 0x00000000, // 118	v

  3098     0x00000000, 0x00000000, 0x00050003, 0x00060004, 0x00070605, 0x00080006, 0x00000000, // 119	w

  3099     0x00000000, 0x00000000, 0x00050003, 0x00000500, 0x00070005, 0x00080006, 0x00000000, // 120	x

  3100     0x00000000, 0x00000000, 0x00050003, 0x00060004, 0x00000600, 0x00000700, 0x00000007, // 121	y

  3101     0x00000000, 0x00000000, 0x00050403, 0x00000500, 0x00000005, 0x00080706, 0x00000000, // 122	z

  3102     0x00000000, 0x00040300, 0x00000400, 0x00000504, 0x00000600, 0x00080700, 0x00000000, // 123	{

  3103     0x00000000, 0x00000300, 0x00000400, 0x00000000, 0x00000600, 0x00000700, 0x00000000, // 124	|

  3104     0x00000000, 0x00000302, 0x00000400, 0x00060500, 0x00000600, 0x00000706, 0x00000000, // 125	}

  3105     0x00000000, 0x00000302, 0x00050000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, // 126	~

  3106     0x00000000, 0x00000000, 0x00000400, 0x00060004, 0x00070605, 0x00000000, 0x00000000, // 127	

  3107     0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,

  3108   };

  3109 

  3110 static void PutTextInternal(const char *str, int len, short x, short y, int color, int backcolor)

  3111 {

  3112   int Opac	 = (color >> 24) & 0xFF;

  3113   int backOpac = (backcolor >> 24) & 0xFF;

  3114   int origX	 = x;

  3115 

  3116   if (!Opac && !backOpac)

  3117     return;

  3118 

  3119   while (*str && len && y < LUA_SCREEN_HEIGHT)

  3120     {

  3121       int c = *str++;

  3122       while (x > LUA_SCREEN_WIDTH && c != '\n')

  3123 	{

  3124 	  c = *str;

  3125 	  if (c == '\0')

  3126 	    break;

  3127 	  str++;

  3128 	}

  3129 

  3130       if (c == '\n')

  3131 	{

  3132 	  x  = origX;

  3133 	  y += 8;

  3134 	  continue;

  3135 	}

  3136       else if (c == '\t') // just in case

  3137 	{

  3138 	  const int tabSpace = 8;

  3139 	  x += (tabSpace - (((x - origX) / 4) % tabSpace)) * 4;

  3140 	  continue;

  3141 	}

  3142 

  3143       if ((unsigned int)(c - 32) >= 96)

  3144 	continue;

  3145 

  3146       const unsigned char *Cur_Glyph = (const unsigned char *) &Small_Font_Data + (c - 32) * 7 * 4;

  3147 

  3148       for (int y2 = 0; y2 < 8; y2++)

  3149 	{

  3150 	  unsigned int glyphLine = *((unsigned int *)Cur_Glyph + y2);

  3151 	  for (int x2 = -1; x2 < 4; x2++)

  3152 	    {

  3153 	      int shift	  = x2 << 3;

  3154 	      int mask	  = 0xFF << shift;

  3155 	      int intensity = (glyphLine & mask) >> shift;

  3156 

  3157 	      if (intensity && x2 >= 0 && y2 < 7)

  3158 		{

  3159 		  //int xdraw = max(0,min(LUA_SCREEN_WIDTH - 1,x+x2));

  3160 		  //int ydraw = max(0,min(LUA_SCREEN_HEIGHT - 1,y+y2));

  3161 		  //gui_drawpixel_fast(xdraw, ydraw, color);

  3162 		  gui_drawpixel_internal(x + x2, y + y2, color);

  3163 		}

  3164 	      else if (backOpac)

  3165 		{

  3166 		  for (int y3 = max(0, y2 - 1); y3 <= min(6, y2 + 1); y3++)

  3167 		    {

  3168 		      unsigned int glyphLine = *((unsigned int *)Cur_Glyph + y3);

  3169 		      for (int x3 = max(0, x2 - 1); x3 <= min(3, x2 + 1); x3++)

  3170 			{

  3171 			  int shift = x3 << 3;

  3172 			  int mask  = 0xFF << shift;

  3173 			  intensity |= (glyphLine & mask) >> shift;

  3174 			  if (intensity)

  3175 			    goto draw_outline;  // speedup?

  3176 			}

  3177 		    }

  3178 

  3179 		draw_outline:

  3180 		  if (intensity)

  3181 		    {

  3182 		      //int xdraw = max(0,min(LUA_SCREEN_WIDTH - 1,x+x2));

  3183 		      //int ydraw = max(0,min(LUA_SCREEN_HEIGHT - 1,y+y2));

  3184 		      //gui_drawpixel_fast(xdraw, ydraw, backcolor);

  3185 		      gui_drawpixel_internal(x + x2, y + y2, backcolor);

  3186 		    }

  3187 		}

  3188 	    }

  3189 	}

  3190 

  3191       x += 4;

  3192       len--;

  3193     }

  3194 }

  3195 

  3196 static int strlinelen(const char *string)

  3197 {

  3198   const char *s = string;

  3199   while (*s && *s != '\n')

  3200     s++;

  3201   if (*s)

  3202     s++;

  3203   return s - string;

  3204 }

  3205 

  3206 static void LuaDisplayString(const char *string, int y, int x, uint32 color, uint32 outlineColor)

  3207 {

  3208   if (!string)

  3209     return;

  3210 

  3211   gui_prepare();

  3212 

  3213   PutTextInternal(string, strlen(string), x, y, color, outlineColor);

  3214 

  3215   /*

  3216     const char* ptr = string;

  3217     while(*ptr && y < LUA_SCREEN_HEIGHT)

  3218     {

  3219     int len = strlinelen(ptr);

  3220     int skip = 0;

  3221     if(len < 1) len = 1;

  3222 

  3223     // break up the line if it's too long to display otherwise

  3224     if(len > 63)

  3225     {

  3226     len = 63;

  3227     const char* ptr2 = ptr + len-1;

  3228     for(int j = len-1; j; j--, ptr2--)

  3229     {

  3230     if(*ptr2 == ' ' || *ptr2 == '\t')

  3231     {

  3232     len = j;

  3233     skip = 1;

  3234     break;

  3235     }

  3236     }

  3237     }

  3238 

  3239     int xl = 0;

  3240     int yl = 0;

  3241     int xh = (LUA_SCREEN_WIDTH - 1 - 1) - 4*len;

  3242     int yh = LUA_SCREEN_HEIGHT - 1;

  3243     int x2 = min(max(x,xl),xh);

  3244     int y2 = min(max(y,yl),yh);

  3245 

  3246     PutTextInternal(ptr,len,x2,y2,color,outlineColor);

  3247 

  3248     ptr += len + skip;

  3249     y += 8;

  3250     }

  3251   */

  3252 }

  3253 

  3254 // gui.text(int x, int y, string msg)

  3255 //

  3256 //  Displays the given text on the screen, using the same font and techniques as the

  3257 

  3258 //  main HUD.

  3259 static int gui_text(lua_State *L)

  3260 {

  3261   //extern int font_height;

  3262   const char *msg;

  3263   int			x, y;

  3264   uint32		colour, borderColour;

  3265 

  3266   x = luaL_checkinteger(L, 1);

  3267   y = luaL_checkinteger(L, 2);

  3268   //msg = luaL_checkstring(L, 3);

  3269   msg = toCString(L, 3);

  3270 

  3271   //	if (x < 0 || x >= LUA_SCREEN_WIDTH || y < 0 || y >= (LUA_SCREEN_HEIGHT - font_height))

  3272   //		luaL_error(L,"bad coordinates");

  3273   colour		 = gui_optcolour(L, 4, LUA_BUILD_PIXEL(255, 255, 255, 255));

  3274   borderColour = gui_optcolour(L, 5, LUA_BUILD_PIXEL(255, 0, 0, 0));

  3275 

  3276   gui_prepare();

  3277 

  3278   LuaDisplayString(msg, y, x, colour, borderColour);

  3279 

  3280   return 0;

  3281 }

  3282 

  3283 // gui.gdoverlay([int dx=0, int dy=0,] string str [, sx=0, sy=0, sw, sh] [, float alphamul=1.0])

  3284 //

  3285 //  Overlays the given image on the screen.

  3286 

  3287 // example: gui.gdoverlay(gd.createFromPng("myimage.png"):gdStr())

  3288 static int gui_gdoverlay(lua_State *L)

  3289 {

  3290   int argCount = lua_gettop(L);

  3291 

  3292   int xStartDst = 0;

  3293   int yStartDst = 0;

  3294   int xStartSrc = 0;

  3295   int yStartSrc = 0;

  3296 

  3297   int index = 1;

  3298   if (lua_type(L, index) == LUA_TNUMBER)

  3299     {

  3300       xStartDst = lua_tointeger(L, index++);

  3301       if (lua_type(L, index) == LUA_TNUMBER)

  3302 	yStartDst = lua_tointeger(L, index++);

  3303     }

  3304 

  3305   luaL_checktype(L, index, LUA_TSTRING);

  3306 

  3307   const unsigned char *ptr = (const unsigned char *)lua_tostring(L, index++);

  3308 

  3309   if (ptr[0] != 255 || (ptr[1] != 254 && ptr[1] != 255))

  3310     luaL_error(L, "bad image data");

  3311 

  3312   bool trueColor = (ptr[1] == 254);

  3313   ptr += 2;

  3314 

  3315   int imgwidth = *ptr++ << 8;

  3316   imgwidth |= *ptr++;

  3317 

  3318   int width	  = imgwidth;

  3319   int imgheight = *ptr++ << 8;

  3320   imgheight |= *ptr++;

  3321 

  3322   int height = imgheight;

  3323   if ((!trueColor && *ptr) || (trueColor && !*ptr))

  3324     luaL_error(L, "bad image data");

  3325   ptr++;

  3326 

  3327   int pitch = imgwidth * (trueColor ? 4 : 1);

  3328 

  3329   if ((argCount - index + 1) >= 4)

  3330     {

  3331       xStartSrc = luaL_checkinteger(L, index++);

  3332       yStartSrc = luaL_checkinteger(L, index++);

  3333       width	  = luaL_checkinteger(L, index++);

  3334       height	  = luaL_checkinteger(L, index++);

  3335     }

  3336 

  3337   int alphaMul = transparencyModifier;

  3338   if (lua_isnumber(L, index))

  3339     alphaMul = (int)(alphaMul * lua_tonumber(L, index++));

  3340   if (alphaMul <= 0)

  3341     return 0;

  3342 

  3343   // since there aren't that many possible opacity levels,

  3344   // do the opacity modification calculations beforehand instead of per pixel

  3345   int opacMap[256];

  3346   for (int i = 0; i < 128; i++)

  3347     {

  3348       int opac = 255 - ((i << 1) | (i & 1)); // gdAlphaMax = 127, not 255

  3349       opac = (opac * alphaMul) / 255;

  3350       if (opac < 0)

  3351 	opac = 0;

  3352       if (opac > 255)

  3353 	opac = 255;

  3354       opacMap[i] = opac;

  3355     }

  3356 

  3357   for (int i = 128; i < 256; i++)

  3358     opacMap[i] = 0;  // what should we do for them, actually?

  3359   int colorsTotal = 0;

  3360   if (!trueColor)

  3361     {

  3362       colorsTotal	 = *ptr++ << 8;

  3363       colorsTotal |= *ptr++;

  3364     }

  3365 

  3366   int transparent = *ptr++ << 24;

  3367   transparent |= *ptr++ << 16;

  3368   transparent |= *ptr++ << 8;

  3369   transparent |= *ptr++;

  3370   struct

  3371   {

  3372     uint8 r, g, b, a;

  3373   } pal[256];

  3374   if (!trueColor)

  3375     for (int i = 0; i < 256; i++)

  3376       {

  3377 	pal[i].r = *ptr++;

  3378 	pal[i].g = *ptr++;

  3379 	pal[i].b = *ptr++;

  3380 	pal[i].a = opacMap[*ptr++];

  3381       }

  3382 

  3383   // some of clippings

  3384   if (xStartSrc < 0)

  3385     {

  3386       width	  += xStartSrc;

  3387       xStartDst -= xStartSrc;

  3388       xStartSrc  = 0;

  3389     }

  3390 

  3391   if (yStartSrc < 0)

  3392     {

  3393       height	  += yStartSrc;

  3394       yStartDst -= yStartSrc;

  3395       yStartSrc  = 0;

  3396     }

  3397 

  3398   if (xStartSrc + width >= imgwidth)

  3399     width = imgwidth - xStartSrc;

  3400   if (yStartSrc + height >= imgheight)

  3401     height = imgheight - yStartSrc;

  3402   if (xStartDst < 0)

  3403     {

  3404       width += xStartDst;

  3405       if (width <= 0)

  3406 	return 0;

  3407       xStartSrc = -xStartDst;

  3408       xStartDst = 0;

  3409     }

  3410 

  3411   if (yStartDst < 0)

  3412     {

  3413       height += yStartDst;

  3414       if (height <= 0)

  3415 	return 0;

  3416       yStartSrc = -yStartDst;

  3417       yStartDst = 0;

  3418     }

  3419 

  3420   if (xStartDst + width >= LUA_SCREEN_WIDTH)

  3421     width = LUA_SCREEN_WIDTH - xStartDst;

  3422   if (yStartDst + height >= LUA_SCREEN_HEIGHT)

  3423     height = LUA_SCREEN_HEIGHT - yStartDst;

  3424   if (width <= 0 || height <= 0)

  3425     return 0;  // out of screen or invalid size

  3426   gui_prepare();

  3427 

  3428   const uint8 *pix = (const uint8 *)(&ptr[yStartSrc * pitch + (xStartSrc * (trueColor ? 4 : 1))]);

  3429   int			 bytesToNextLine = pitch - (width * (trueColor ? 4 : 1));

  3430   if (trueColor)

  3431     {

  3432       for (int y = yStartDst; y < height + yStartDst && y < LUA_SCREEN_HEIGHT; y++, pix += bytesToNextLine)

  3433 	{

  3434 	  for (int x = xStartDst; x < width + xStartDst && x < LUA_SCREEN_WIDTH; x++, pix += 4)

  3435 	    {

  3436 	      gui_drawpixel_fast(x, y, LUA_BUILD_PIXEL(opacMap[pix[0]], pix[1], pix[2], pix[3]));

  3437 	    }

  3438 	}

  3439     }

  3440   else

  3441     {

  3442       for (int y = yStartDst; y < height + yStartDst && y < LUA_SCREEN_HEIGHT; y++, pix += bytesToNextLine)

  3443 	{

  3444 	  for (int x = xStartDst; x < width + xStartDst && x < LUA_SCREEN_WIDTH; x++, pix++)

  3445 	    {

  3446 	      gui_drawpixel_fast(x, y, LUA_BUILD_PIXEL(pal[*pix].a, pal[*pix].r, pal[*pix].g, pal[*pix].b));

  3447 	    }

  3448 	}

  3449     }

  3450 

  3451   return 0;

  3452 }

  3453 

  3454 // function gui.register(function f)

  3455 //

  3456 //  This function will be called just before a graphical update.

  3457 //  More complicated, but doesn't suffer any frame delays.

  3458 //  Nil will be accepted in place of a function to erase

  3459 //  a previously registered function, and the previous function

  3460 

  3461 //  (if any) is returned, or nil if none.

  3462 static int gui_register(lua_State *L)

  3463 {

  3464   // We'll do this straight up.

  3465   // First set up the stack.

  3466   lua_settop(L, 1);

  3467 

  3468   // Verify the validity of the entry

  3469   if (!lua_isnil(L, 1))

  3470     luaL_checktype(L, 1, LUA_TFUNCTION);

  3471 

  3472   // Get the old value

  3473   lua_getfield(L, LUA_REGISTRYINDEX, guiCallbackTable);

  3474 

  3475   // Save the new value

  3476   lua_pushvalue(L, 1);

  3477   lua_setfield(L, LUA_REGISTRYINDEX, guiCallbackTable);

  3478 

  3479   // The old value is on top of the stack. Return it.

  3480   return 1;

  3481 }

  3482 

  3483 // string gui.popup(string message, [string type = "ok"])

  3484 //

  3485 

  3486 //  Popup dialog!

  3487 int gui_popup(lua_State *L)

  3488 {

  3489   const char *message = luaL_checkstring(L, 1);

  3490   const char *type	= luaL_optstring(L, 2, "ok");

  3491 

  3492 #if (defined(WIN32) && !defined(SDL))

  3493   int t;

  3494   if (strcmp(type, "ok") == 0)

  3495     t = MB_OK;

  3496   else if (strcmp(type, "yesno") == 0)

  3497     t = MB_YESNO;

  3498   else if (strcmp(type, "yesnocancel") == 0)

  3499     t = MB_YESNOCANCEL;

  3500   else

  3501     return luaL_error(L, "invalid popup type \"%s\"", type);

  3502 

  3503   theApp.winCheckFullscreen();

  3504   systemSoundClearBuffer();

  3505   int result = AfxGetApp()->m_pMainWnd->MessageBox(message, "Lua Script Pop-up", t);

  3506 

  3507   lua_settop(L, 1);

  3508 

  3509   if (t != MB_OK)

  3510     {

  3511       if (result == IDYES)

  3512 	lua_pushstring(L, "yes");

  3513       else if (result == IDNO)

  3514 	lua_pushstring(L, "no");

  3515       else if (result == IDCANCEL)

  3516 	lua_pushstring(L, "cancel");

  3517       else

  3518 	luaL_error(L, "win32 unrecognized return value %d", result);

  3519       return 1;

  3520     }

  3521 

  3522   // else, we don't care.

  3523   return 0;

  3524 #else

  3525   char *t;

  3526 #ifdef __linux

  3527   // The Linux backend has a "FromPause" variable.

  3528   // If set to 1, assume some known external event has screwed with the flow of time.

  3529   // Since this pauses the emulator waiting for a response, we set it to 1.

  3530   // FIXME: Well, actually it doesn't

  3531   //	extern int FromPause;

  3532   //	FromPause = 1;

  3533 

  3534   int pid; // appease compiler

  3535 

  3536   // Before doing any work, verify the correctness of the parameters.

  3537   if (strcmp(type, "ok") == 0)

  3538     t = "OK:100";

  3539   else if (strcmp(type, "yesno") == 0)

  3540     t = "Yes:100,No:101";

  3541   else if (strcmp(type, "yesnocancel") == 0)

  3542     t = "Yes:100,No:101,Cancel:102";

  3543   else

  3544     return luaL_error(L, "invalid popup type \"%s\"", type);

  3545 

  3546   // Can we find a copy of xmessage? Search the path.

  3547   char *path = strdup(getenv("PATH"));

  3548 

  3549   char *current = path;

  3550 

  3551   char *colon;

  3552 

  3553   int found = 0;

  3554 

  3555   while (current)

  3556     {

  3557       colon = strchr(current, ':');

  3558 

  3559       // Clip off the colon.

  3560       *colon++ = 0;

  3561 

  3562       int	  len	   = strlen(current);

  3563       char *filename = (char *)malloc(len + 12); // always give excess

  3564       snprintf(filename, len + 12, "%s/xmessage", current);

  3565 

  3566       if (access(filename, X_OK) == 0)

  3567 	{

  3568 	  free(filename);

  3569 	  found = 1;

  3570 	  break;

  3571 	}

  3572 

  3573       // Failed, move on.

  3574       current = colon;

  3575       free(filename);

  3576     }

  3577 

  3578   free(path);

  3579 

  3580   // We've found it?

  3581   if (!found)

  3582     goto use_console;

  3583 

  3584   pid = fork();

  3585   if (pid == 0)

  3586     { // I'm the virgin sacrifice

  3587       // I'm gonna be dead in a matter of microseconds anyways, so wasted memory doesn't matter to me.

  3588       // Go ahead and abuse strdup.

  3589       char *parameters[] = { "xmessage", "-buttons", t, strdup(message), NULL };

  3590 

  3591       execvp("xmessage", parameters);

  3592 

  3593       // Aw shitty

  3594       perror("exec xmessage");

  3595       exit(1);

  3596     }

  3597   else if (pid < 0) // something went wrong!!! Oh hell... use the console

  3598     goto use_console;

  3599   else

  3600     {

  3601       // We're the parent. Watch for the child.

  3602       int r;

  3603       int res = waitpid(pid, &r, 0);

  3604       if (res < 0) // wtf?

  3605 	goto use_console;

  3606 

  3607       // The return value gets copmlicated...

  3608       if (!WIFEXITED(r))

  3609 	{

  3610 	  luaL_error(L, "don't screw with my xmessage process!");

  3611 	}

  3612 

  3613       r = WEXITSTATUS(r);

  3614 

  3615       // We assume it's worked.

  3616       if (r == 0)

  3617 	{

  3618 	  return 0; // no parameters for an OK

  3619 	}

  3620 

  3621       if (r == 100)

  3622 	{

  3623 	  lua_pushstring(L, "yes");

  3624 	  return 1;

  3625 	}

  3626 

  3627       if (r == 101)

  3628 	{

  3629 	  lua_pushstring(L, "no");

  3630 	  return 1;

  3631 	}

  3632 

  3633       if (r == 102)

  3634 	{

  3635 	  lua_pushstring(L, "cancel");

  3636 	  return 1;

  3637 	}

  3638 

  3639       // Wtf?

  3640       return luaL_error(L, "popup failed due to unknown results involving xmessage (%d)", r);

  3641     }

  3642 

  3643  use_console:

  3644 #endif

  3645 

  3646   // All else has failed

  3647   if (strcmp(type, "ok") == 0)

  3648     t = "";

  3649   else if (strcmp(type, "yesno") == 0)

  3650     t = "yn";

  3651   else if (strcmp(type, "yesnocancel") == 0)

  3652     t = "ync";

  3653   else

  3654     return luaL_error(L, "invalid popup type \"%s\"", type);

  3655 

  3656   fprintf(stderr, "Lua Message: %s\n", message);

  3657 

  3658   while (true)

  3659     {

  3660       char buffer[64];

  3661 

  3662       // We don't want parameters

  3663       if (!t[0])

  3664 	{

  3665 	  fprintf(stderr, "[Press Enter]");

  3666 	  fgets(buffer, sizeof(buffer), stdin);

  3667 

  3668 	  // We're done

  3669 	  return 0;

  3670 	}

  3671 

  3672       fprintf(stderr, "(%s): ", t);

  3673       fgets(buffer, sizeof(buffer), stdin);

  3674 

  3675       // Check if the option is in the list

  3676       if (strchr(t, tolower(buffer[0])))

  3677 	{

  3678 	  switch (tolower(buffer[0]))

  3679 	    {

  3680 	    case 'y':

  3681 	      lua_pushstring(L, "yes");

  3682 	      return 1;

  3683 	    case 'n':

  3684 	      lua_pushstring(L, "no");

  3685 	      return 1;

  3686 	    case 'c':

  3687 	      lua_pushstring(L, "cancel");

  3688 	      return 1;

  3689 	    default:

  3690 	      luaL_error(L, "internal logic error in console based prompts for gui.popup");

  3691 	    }

  3692 	}

  3693 

  3694       // We fell through, so we assume the user answered wrong and prompt again.

  3695     }

  3696 

  3697   // Nothing here, since the only way out is in the loop.

  3698 #endif

  3699 }

  3700 

  3701 #if (defined(WIN32) && !defined(SDL))

  3702 const char  *s_keyToName[256] =

  3703   {

  3704     NULL,

  3705     "leftclick",

  3706     "rightclick",

  3707     NULL,

  3708     "middleclick",

  3709     NULL,

  3710     NULL,

  3711     NULL,

  3712     "backspace",

  3713     "tab",

  3714     NULL,

  3715     NULL,

  3716     NULL,

  3717     "enter",

  3718     NULL,

  3719     NULL,

  3720     "shift",       // 0x10

  3721     "control",

  3722     "alt",

  3723     "pause",

  3724     "capslock",

  3725     NULL,

  3726     NULL,

  3727     NULL,

  3728     NULL,

  3729     NULL,

  3730     NULL,

  3731     "escape",

  3732     NULL,

  3733     NULL,

  3734     NULL,

  3735     NULL,

  3736     "space",       // 0x20

  3737     "pageup",

  3738     "pagedown",

  3739     "end",

  3740     "home",

  3741     "left",

  3742     "up",

  3743     "right",

  3744     "down",

  3745     NULL,

  3746     NULL,

  3747     NULL,

  3748     NULL,

  3749     "insert",

  3750     "delete",

  3751     NULL,

  3752     "0",		   "1",			   "2",			   "3",			   "4",		   "5",		  "6",		 "7",		"8",	   "9",

  3753     NULL,		   NULL,		   NULL,		   NULL,		   NULL,	   NULL,	  NULL,

  3754     "A",		   "B",			   "C",			   "D",			   "E",		   "F",		  "G",		 "H",		"I",	   "J",

  3755     "K",		   "L",			   "M",			   "N",			   "O",		   "P",		  "Q",		 "R",		"S",	   "T",

  3756     "U",		   "V",			   "W",			   "X",			   "Y",		   "Z",

  3757     NULL,

  3758     NULL,

  3759     NULL,

  3760     NULL,

  3761     NULL,

  3762     "numpad0",	   "numpad1",	   "numpad2",	   "numpad3",	   "numpad4",  "numpad5", "numpad6", "numpad7", "numpad8", "numpad9",

  3763     "numpad*",	   "numpad+",

  3764     NULL,

  3765     "numpad-",	   "numpad.",	   "numpad/",

  3766     "F1",		   "F2",		   "F3",		   "F4",		   "F5",	   "F6",	  "F7",		 "F8",		"F9",	   "F10",	  "F11",

  3767     "F12",

  3768     "F13",		   "F14",		   "F15",		   "F16",		   "F17",	   "F18",	  "F19",	 "F20",		"F21",	   "F22",	  "F23",

  3769     "F24",

  3770     NULL,

  3771     NULL,

  3772     NULL,

  3773     NULL,

  3774     NULL,

  3775     NULL,

  3776     NULL,

  3777     NULL,

  3778     "numlock",

  3779     "scrolllock",

  3780     NULL,          // 0x92

  3781     NULL,		   NULL,		   NULL,		   NULL,		   NULL,	   NULL,	  NULL,		 NULL,		NULL,	   NULL,	  NULL,

  3782     NULL,		   NULL,		   NULL,		   NULL,		   NULL,	   NULL,	  NULL,		 NULL,		NULL,	   NULL,

  3783     NULL,		   NULL,		   NULL,		   NULL,		   NULL,	   NULL,	  NULL,		 NULL,		NULL,

  3784     NULL,		   NULL,		   NULL,		   NULL,		   NULL,	   NULL,	  NULL,		 NULL,

  3785     NULL,          // 0xB9

  3786     "semicolon",

  3787     "plus",

  3788     "comma",

  3789     "minus",

  3790     "period",

  3791     "slash",

  3792     "tilde",

  3793     NULL,          // 0xC1

  3794     NULL,		   NULL,		   NULL,		   NULL,		   NULL,	   NULL,	  NULL,		 NULL,		NULL,

  3795     NULL,		   NULL,		   NULL,		   NULL,		   NULL,	   NULL,	  NULL,		 NULL,

  3796     NULL,		   NULL,		   NULL,		   NULL,		   NULL,	   NULL,	  NULL,

  3797     NULL,          // 0xDA

  3798     "leftbracket",

  3799     "backslash",

  3800     "rightbracket",

  3801     "quote",

  3802   };

  3803 #endif

  3804 

  3805 // input.get()

  3806 // takes no input, returns a lua table of entries representing the current input state,

  3807 // independent of the joypad buttons the emulated game thinks are pressed

  3808 // for example:

  3809 //   if the user is holding the W key and the left mouse button

  3810 //   and has the mouse at the bottom-right corner of the game screen,

  3811 

  3812 //   then this would return {W=true, leftclick=true, xmouse=255, ymouse=223}

  3813 static int input_getcurrentinputstatus(lua_State *L)

  3814 {

  3815   lua_newtable(L);

  3816 

  3817 #if (defined(WIN32) && !defined(SDL))

  3818   // keyboard and mouse button status

  3819   {

  3820     unsigned char keys[256];

  3821     if (true /*!GUI.BackgroundInput*/) // TODO: background input

  3822       {

  3823 	if (GetKeyboardState(keys))

  3824 	  {

  3825 	    for (int i = 1; i < 255; i++)

  3826 	      {

  3827 		int mask = (i == VK_CAPITAL || i == VK_NUMLOCK || i == VK_SCROLL) ? 0x01 : 0x80;

  3828 		if (keys[i] & mask)

  3829 		  {

  3830 		    const char *name = s_keyToName[i];

  3831 		    if (name)

  3832 		      {

  3833 			lua_pushboolean(L, true);

  3834 			lua_setfield(L, -2, name);

  3835 		      }

  3836 		  }

  3837 	      }

  3838 	  }

  3839       }

  3840     else // use a slightly different method that will detect background input:

  3841       {

  3842 	for (int i = 1; i < 255; i++)

  3843 	  {

  3844 	    const char *name = s_keyToName[i];

  3845 	    if (name)

  3846 	      {

  3847 		int active;

  3848 		if (i == VK_CAPITAL || i == VK_NUMLOCK || i == VK_SCROLL)

  3849 		  active = GetKeyState(i) & 0x01;

  3850 		else

  3851 		  active = GetAsyncKeyState(i) & 0x8000;

  3852 		if (active)

  3853 		  {

  3854 		    lua_pushboolean(L, true);

  3855 		    lua_setfield(L, -2, name);

  3856 		  }

  3857 	      }

  3858 	  }

  3859       }

  3860   }

  3861 

  3862   // mouse position in game screen pixel coordinates

  3863   {

  3864     POINT mouse;

  3865 

  3866     int xofs = 0, yofs = 0, width = 240, height = 160;

  3867     if (!systemIsRunningGBA())

  3868       {

  3869 	if (gbBorderOn)

  3870 	  width = 256, height = 224, xofs = 48, yofs = 40;

  3871 	else

  3872 	  width = 160, height = 144;

  3873       }

  3874 

  3875     GetCursorPos(&mouse);

  3876     AfxGetApp()->m_pMainWnd->ScreenToClient(&mouse);

  3877 

  3878     // game screen is always fully stretched to window size,

  3879     // with no aspect rate correction, or something like that.

  3880     RECT clientRect;

  3881     AfxGetApp()->m_pMainWnd->GetClientRect(&clientRect);

  3882 

  3883     int wndWidth  = clientRect.right - clientRect.left;

  3884     int wndHeight = clientRect.bottom - clientRect.top;

  3885     mouse.x = (LONG) (mouse.x * ((float)width / wndWidth)) - xofs;

  3886     mouse.y = (LONG) (mouse.y * ((float)height / wndHeight)) - yofs;

  3887 

  3888     lua_pushinteger(L, mouse.x);

  3889     lua_setfield(L, -2, "xmouse");

  3890     lua_pushinteger(L, mouse.y);

  3891     lua_setfield(L, -2, "ymouse");

  3892   }

  3893 

  3894 #else

  3895   // NYI (well, return an empty table)

  3896 #endif

  3897   return 1;

  3898 }

  3899 

  3900 static int avi_framecount(lua_State *L)

  3901 {

  3902 #ifdef WIN32

  3903   if (theApp.aviRecorder != NULL)

  3904     {

  3905       lua_pushinteger(L, theApp.aviRecorder->videoFrames());

  3906     }

  3907   else

  3908 #endif

  3909     {

  3910       lua_pushinteger(L, 0);

  3911     }

  3912   return 1;

  3913 }

  3914 

  3915 static int avi_pause(lua_State *L)

  3916 {

  3917 #ifdef WIN32

  3918   if (theApp.aviRecorder != NULL)

  3919     theApp.aviRecorder->Pause(true);

  3920 #endif

  3921   return 1;

  3922 }

  3923 

  3924 static int avi_resume(lua_State *L)

  3925 {

  3926 #ifdef WIN32

  3927   if (theApp.aviRecorder != NULL)

  3928     theApp.aviRecorder->Pause(false);

  3929 #endif

  3930   return 1;

  3931 }

  3932 

  3933 static int sound_get(lua_State *L)

  3934 {

  3935   extern int32 soundLevel1;

  3936   extern int32 soundLevel2;

  3937   extern int32 soundBalance;

  3938   extern int32 soundMasterOn;

  3939   extern int32 soundVIN;

  3940   extern int32 sound1On;

  3941   extern int32 sound1EnvelopeVolume;

  3942   extern int32 sound2On;

  3943   extern int32 sound2EnvelopeVolume;

  3944   extern int32 sound3On;

  3945   extern int32 sound3OutputLevel;

  3946   extern int32 sound3Bank;

  3947   extern int32 sound3DataSize;

  3948   extern int32 sound3ForcedOutput;

  3949   extern int32 sound4On;

  3950   extern int32 sound4EnvelopeVolume;

  3951   extern u8 sound3WaveRam[0x20];

  3952 

  3953   int freqReg;

  3954   double freq;

  3955   double leftvolscale;

  3956   double rightvolscale;

  3957   double panpot;

  3958   bool gba = systemIsRunningGBA();

  3959   u8* gbMem = gba ? ioMem : gbMemory;

  3960   const int rNR10 = gba ? 0x60 : 0xff10;

  3961   const int rNR11 = gba ? 0x62 : 0xff11;

  3962   const int rNR12 = gba ? 0x63 : 0xff12;

  3963   const int rNR13 = gba ? 0x64 : 0xff13;

  3964   const int rNR14 = gba ? 0x65 : 0xff14;

  3965   const int rNR21 = gba ? 0x68 : 0xff16;

  3966   const int rNR22 = gba ? 0x69 : 0xff17;

  3967   const int rNR23 = gba ? 0x6c : 0xff18;

  3968   const int rNR24 = gba ? 0x6d : 0xff19;

  3969   const int rNR30 = gba ? 0x70 : 0xff1a;

  3970   const int rNR31 = gba ? 0x72 : 0xff1b;

  3971   const int rNR32 = gba ? 0x73 : 0xff1c;

  3972   const int rNR33 = gba ? 0x74 : 0xff1d;

  3973   const int rNR34 = gba ? 0x75 : 0xff1e;

  3974   const int rNR41 = gba ? 0x78 : 0xff20;

  3975   const int rNR42 = gba ? 0x79 : 0xff21;

  3976   const int rNR43 = gba ? 0x7c : 0xff22;

  3977   const int rNR44 = gba ? 0x7d : 0xff23;

  3978   const int rNR50 = gba ? 0x80 : 0xff24;

  3979   const int rNR51 = gba ? 0x81 : 0xff25;

  3980   const int rNR52 = gba ? 0x84 : 0xff26;

  3981   const int rWAVE_RAM = gba ? 0x90 : 0xff30;

  3982 

  3983   const int32 _soundVIN = 0x88; // gba ? 0x88 : soundVIN;

  3984   const bool soundVINLeft = ((_soundVIN & 0x80) != 0);

  3985   const bool soundVINRight = ((_soundVIN & 0x08) != 0);

  3986 

  3987   lua_newtable(L);

  3988 

  3989   // square1

  3990   lua_newtable(L);

  3991   if(sound1On == 0 || soundMasterOn == 0)

  3992     {

  3993       lua_pushnumber(L, 0.0);

  3994       panpot = 0.5;

  3995     }

  3996   else

  3997     {

  3998       double envVolume = sound1EnvelopeVolume / 15.0;

  3999       if (soundVINLeft && (soundBalance & 0x10) != 0)

  4000 	leftvolscale = ((soundLevel2 / 7.0) * envVolume);

  4001       else

  4002 	leftvolscale = 0.0;

  4003       if (soundVINRight && (soundBalance & 0x01) != 0)

  4004 	rightvolscale = ((soundLevel1 / 7.0) * envVolume);

  4005       else

  4006 	rightvolscale = 0.0;

  4007       if ((leftvolscale + rightvolscale) != 0)

  4008 	panpot = rightvolscale / (leftvolscale + rightvolscale);

  4009       else

  4010 	panpot = 0.5;

  4011       lua_pushnumber(L, (leftvolscale + rightvolscale) / 2.0);

  4012     }

  4013   lua_setfield(L, -2, "volume");

  4014   lua_pushnumber(L, panpot);

  4015   lua_setfield(L, -2, "panpot");

  4016   freqReg = (((int)(gbMem[rNR14] & 7) << 8) | gbMem[rNR13]);

  4017   freq = 131072.0 / (2048 - freqReg);

  4018   lua_pushnumber(L, freq);

  4019   lua_setfield(L, -2, "frequency");

  4020   lua_pushnumber(L, (log(freq / 440.0) * 12 / log(2.0)) + 69);

  4021   lua_setfield(L, -2, "midikey");

  4022   lua_pushinteger(L, (gbMem[rNR11] & 0xC0) >> 6);

  4023   lua_setfield(L, -2, "duty");

  4024   lua_newtable(L);

  4025   lua_pushinteger(L, freqReg);

  4026   lua_setfield(L, -2, "frequency");

  4027   lua_setfield(L, -2, "regs");

  4028   lua_setfield(L, -2, "square1");

  4029   // square2

  4030   lua_newtable(L);

  4031   if(sound2On == 0 || soundMasterOn == 0)

  4032     {

  4033       lua_pushnumber(L, 0.0);

  4034       panpot = 0.5;

  4035     }

  4036   else

  4037     {

  4038       double envVolume = sound2EnvelopeVolume / 15.0;

  4039       if (soundVINLeft && (soundBalance & 0x20) != 0)

  4040 	leftvolscale = ((soundLevel2 / 7.0) * envVolume);

  4041       else

  4042 	leftvolscale = 0.0;

  4043       if (soundVINRight && (soundBalance & 0x02) != 0)

  4044 	rightvolscale = ((soundLevel1 / 7.0) * envVolume);

  4045       else

  4046 	rightvolscale = 0.0;

  4047       if ((leftvolscale + rightvolscale) != 0)

  4048 	panpot = rightvolscale / (leftvolscale + rightvolscale);

  4049       else

  4050 	panpot = 0.5;

  4051       lua_pushnumber(L, (leftvolscale + rightvolscale) / 2.0);

  4052     }

  4053   lua_setfield(L, -2, "volume");

  4054   lua_pushnumber(L, panpot);

  4055   lua_setfield(L, -2, "panpot");

  4056   freqReg = (((int)(gbMem[rNR24] & 7) << 8) | gbMem[rNR23]);

  4057   freq = 131072.0 / (2048 - freqReg);

  4058   lua_pushnumber(L, freq);

  4059   lua_setfield(L, -2, "frequency");

  4060   lua_pushnumber(L, (log(freq / 440.0) * 12 / log(2.0)) + 69);

  4061   lua_setfield(L, -2, "midikey");

  4062   lua_pushinteger(L, (gbMem[rNR21] & 0xC0) >> 6);

  4063   lua_setfield(L, -2, "duty");

  4064   lua_newtable(L);

  4065   lua_pushinteger(L, freqReg);

  4066   lua_setfield(L, -2, "frequency");

  4067   lua_setfield(L, -2, "regs");

  4068   lua_setfield(L, -2, "square2");

  4069   // wavememory

  4070   lua_newtable(L);

  4071   if(sound3On == 0 || soundMasterOn == 0)

  4072     {

  4073       lua_pushnumber(L, 0.0);

  4074       panpot = 0.5;

  4075     }

  4076   else

  4077     {

  4078       double envVolume;

  4079       if (gba && sound3ForcedOutput != 0)

  4080 	envVolume = 0.75;

  4081       else

  4082 	{

  4083 	  double volTable[4] = { 0.0, 1.0, 0.5, 0.25 };

  4084 	  envVolume = volTable[sound3OutputLevel & 3];

  4085 	}

  4086 

  4087       if (soundVINLeft && (soundBalance & 0x40) != 0)

  4088 	leftvolscale = ((soundLevel2 / 7.0) * envVolume);

  4089       else

  4090 	leftvolscale = 0.0;

  4091       if (soundVINRight && (soundBalance & 0x04) != 0)

  4092 	rightvolscale = ((soundLevel1 / 7.0) * envVolume);

  4093       else

  4094 	rightvolscale = 0.0;

  4095       if ((leftvolscale + rightvolscale) != 0)

  4096 	panpot = rightvolscale / (leftvolscale + rightvolscale);

  4097       else

  4098 	panpot = 0.5;

  4099       lua_pushnumber(L, (leftvolscale + rightvolscale) / 2.0);

  4100     }

  4101   lua_setfield(L, -2, "volume");

  4102   lua_pushnumber(L, panpot);

  4103   lua_setfield(L, -2, "panpot");

  4104   int waveMemSamples = 32;

  4105   if (gba)

  4106     {

  4107       lua_pushlstring(L, (const char *) &sound3WaveRam[sound3Bank * 0x10], sound3DataSize ? 0x20 : 0x10);

  4108       waveMemSamples = sound3DataSize ? 64 : 32;

  4109     }

  4110   else

  4111     {

  4112       lua_pushlstring(L, (const char *) &gbMem[rWAVE_RAM], 0x10);

  4113     }

  4114   lua_setfield(L, -2, "waveform");

  4115   freqReg = (((int)(gbMem[rNR34] & 7) << 8) | gbMem[rNR33]);

  4116   freq = 2097152.0 / (waveMemSamples * (2048 - freqReg));

  4117   lua_pushnumber(L, freq);

  4118   lua_setfield(L, -2, "frequency");

  4119   lua_pushnumber(L, (log(freq / 440.0) * 12 / log(2.0)) + 69);

  4120   lua_setfield(L, -2, "midikey");

  4121   lua_newtable(L);

  4122   lua_pushinteger(L, freqReg);

  4123   lua_setfield(L, -2, "frequency");

  4124   lua_setfield(L, -2, "regs");

  4125   lua_setfield(L, -2, "wavememory");

  4126   // noise

  4127   lua_newtable(L);

  4128   if(sound4On == 0 || soundMasterOn == 0)

  4129     {

  4130       lua_pushnumber(L, 0.0);

  4131       panpot = 0.5;

  4132     }

  4133   else

  4134     {

  4135       double envVolume = sound4EnvelopeVolume / 15.0;

  4136       if (soundVINLeft && (soundBalance & 0x80) != 0)

  4137 	leftvolscale = ((soundLevel2 / 7.0) * envVolume);

  4138       else

  4139 	leftvolscale = 0.0;

  4140       if (soundVINRight && (soundBalance & 0x08) != 0)

  4141 	rightvolscale = ((soundLevel1 / 7.0) * envVolume);

  4142       else

  4143 	rightvolscale = 0.0;

  4144       if ((leftvolscale + rightvolscale) != 0)

  4145 	panpot = rightvolscale / (leftvolscale + rightvolscale);

  4146       else

  4147 	panpot = 0.5;

  4148       lua_pushnumber(L, (leftvolscale + rightvolscale) / 2.0);

  4149     }

  4150   lua_setfield(L, -2, "volume");

  4151   lua_pushnumber(L, panpot);

  4152   lua_setfield(L, -2, "panpot");

  4153   const int gbNoiseFreqTable[8] = { 1, 2, 4, 6, 8, 10, 12, 14 };

  4154   freqReg = gbNoiseFreqTable[gbMem[rNR43] & 7] << (1 + (gbMem[rNR43] >> 4));

  4155   lua_pushboolean(L, (gbMem[rNR43] & 8) != 0);

  4156   lua_setfield(L, -2, "short");

  4157   freq = 1048576.0 / freqReg;

  4158   lua_pushnumber(L, freq);

  4159   lua_setfield(L, -2, "frequency");

  4160   lua_pushnumber(L, (log(freq / 440.0) * 12 / log(2.0)) + 69);

  4161   lua_setfield(L, -2, "midikey");

  4162   lua_newtable(L);

  4163   lua_pushinteger(L, freqReg);

  4164   lua_setfield(L, -2, "frequency");

  4165   lua_setfield(L, -2, "regs");

  4166   lua_setfield(L, -2, "noise");

  4167 

  4168   return 1;

  4169 }

  4170 

  4171 // same as math.random, but uses SFMT instead of C rand()

  4172 // FIXME: this function doesn't care multi-instance,

  4173 

  4174 //        original math.random either though (Lua 5.1)

  4175 static int sfmt_random(lua_State *L)

  4176 {

  4177   lua_Number r = (lua_Number) genrand_real2();

  4178   switch (lua_gettop(L))

  4179     { // check number of arguments

  4180     case 0:

  4181       { // no arguments

  4182 	lua_pushnumber(L, r); // Number between 0 and 1

  4183 	break;

  4184       }

  4185 

  4186     case 1:

  4187       { // only upper limit

  4188 	int u = luaL_checkint(L, 1);

  4189 	luaL_argcheck(L, 1 <= u, 1, "interval is empty");

  4190 	lua_pushnumber(L, floor(r * u) + 1); // int between 1 and `u'

  4191 	break;

  4192       }

  4193 

  4194     case 2:

  4195       { // lower and upper limits

  4196 	int l = luaL_checkint(L, 1);

  4197 	int u = luaL_checkint(L, 2);

  4198 	luaL_argcheck(L, l <= u, 2, "interval is empty");

  4199 	lua_pushnumber(L, floor(r * (u - l + 1)) + l); // int between `l' and `u'

  4200 	break;

  4201       }

  4202 

  4203     default:

  4204       return luaL_error(L, "wrong number of arguments");

  4205     }

  4206 

  4207   return 1;

  4208 }

  4209 

  4210 // same as math.randomseed, but uses SFMT instead of C srand()

  4211 // FIXME: this function doesn't care multi-instance,

  4212 

  4213 //        original math.randomseed either though (Lua 5.1)

  4214 static int sfmt_randomseed(lua_State *L)

  4215 {

  4216   init_gen_rand(luaL_checkint(L, 1));

  4217   return 0;

  4218 }

  4219 

  4220 // the following bit operations are ported from LuaBitOp 1.0.1,

  4221 // because it can handle the sign bit (bit 31) correctly.

  4222 

  4223 /*

  4224 ** Lua BitOp -- a bit operations library for Lua 5.1.

  4225 ** http://bitop.luajit.org/

  4226 **

  4227 ** Copyright (C) 2008-2009 Mike Pall. All rights reserved.

  4228 **

  4229 ** Permission is hereby granted, free of charge, to any person obtaining

  4230 ** a copy of this software and associated documentation files (the

  4231 ** "Software"), to deal in the Software without restriction, including

  4232 ** without limitation the rights to use, copy, modify, merge, publish,

  4233 ** distribute, sublicense, and/or sell copies of the Software, and to

  4234 ** permit persons to whom the Software is furnished to do so, subject to

  4235 ** the following conditions:

  4236 **

  4237 ** The above copyright notice and this permission notice shall be

  4238 ** included in all copies or substantial portions of the Software.

  4239 **

  4240 ** THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

  4241 ** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

  4242 ** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.

  4243 ** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY

  4244 ** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,

  4245 ** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE

  4246 ** SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

  4247 **

  4248 ** [ MIT license: http://www.opensource.org/licenses/mit-license.php ]

  4249 */

  4250 

  4251 #ifdef _MSC_VER

  4252 /* MSVC is stuck in the last century and doesn't have C99's stdint.h. */

  4253 typedef __int32			 int32_t;

  4254 typedef unsigned __int32 uint32_t;

  4255 typedef unsigned __int64 uint64_t;

  4256 #else

  4257 #include <stdint.h>

  4258 #endif

  4259 

  4260 typedef int32_t	 SBits;

  4261 typedef uint32_t UBits;

  4262 

  4263 typedef union

  4264 {

  4265   lua_Number n;

  4266 #ifdef LUA_NUMBER_DOUBLE

  4267   uint64_t b;

  4268 #else

  4269   UBits b;

  4270 #endif

  4271 } BitNum;

  4272 

  4273 /* Convert argument to bit type. */

  4274 static UBits barg(lua_State *L, int idx)

  4275 {

  4276   BitNum bn;

  4277   UBits  b;

  4278   bn.n = lua_tonumber(L, idx);

  4279 #if defined(LUA_NUMBER_DOUBLE)

  4280   bn.n += 6755399441055744.0; /* 2^52+2^51 */

  4281 #ifdef SWAPPED_DOUBLE

  4282   b = (UBits)(bn.b >> 32);

  4283 #else

  4284   b = (UBits)(bn.b & 0xffffffff);

  4285 #endif

  4286 #elif defined(LUA_NUMBER_INT) || defined(LUA_NUMBER_LONG) ||		\

  4287   defined(LUA_NUMBER_LONGLONG) || defined(LUA_NUMBER_LONG_LONG) ||	\

  4288   defined(LUA_NUMBER_LLONG)

  4289   if (sizeof(UBits) == sizeof(lua_Number))

  4290     b = bn.b;

  4291   else

  4292     b = (UBits)(SBits)bn.n;

  4293 #elif defined(LUA_NUMBER_FLOAT)

  4294 #error "A 'float' lua_Number type is incompatible with this library"

  4295 #else

  4296 #error "Unknown number type, check LUA_NUMBER_* in luaconf.h"

  4297 #endif

  4298   if (b == 0 && !lua_isnumber(L, idx))

  4299     luaL_typerror(L, idx, "number");

  4300   return b;

  4301 }

  4302 

  4303 /* Return bit type. */

  4304 #define BRET(b)  lua_pushnumber(L, (lua_Number)(SBits)(b)); return 1;

  4305 

  4306 static int bit_tobit(lua_State *L) { BRET(barg(L, 1)) }

  4307 static int bit_bnot(lua_State *L) { BRET(~barg(L, 1)) }

  4308 

  4309 #define BIT_OP(func, opr)					\

  4310   static int func(lua_State * L) { int i; UBits b = barg(L, 1); \

  4311     for (i = lua_gettop(L); i > 1; i--)				\

  4312       b opr barg(L, i); BRET(b) }

  4313 BIT_OP(bit_band, &= )

  4314 BIT_OP(bit_bor, |= )

  4315 BIT_OP(bit_bxor, ^= )

  4316 

  4317 #define bshl(b, n)  (b << n)

  4318 #define bshr(b, n)  (b >> n)

  4319 #define bsar(b, n)  ((SBits)b >> n)

  4320 #define brol(b, n)  ((b << n) | (b >> (32 - n)))

  4321 #define bror(b, n)  ((b << (32 - n)) | (b >> n))

  4322 #define BIT_SH(func, fn)						\

  4323   static int func(lua_State * L) {					\

  4324     UBits b = barg(L, 1); UBits n = barg(L, 2) & 31; BRET(fn(b, n)) }

  4325 BIT_SH(bit_lshift, bshl)

  4326 BIT_SH(bit_rshift, bshr)

  4327 BIT_SH(bit_arshift, bsar)

  4328 BIT_SH(bit_rol, brol)

  4329 BIT_SH(bit_ror, bror)

  4330 

  4331 static int bit_bswap(lua_State *L)

  4332 {

  4333   UBits b = barg(L, 1);

  4334   b = (b >> 24) | ((b >> 8) & 0xff00) | ((b & 0xff00) << 8) | (b << 24);

  4335   BRET(b)

  4336     }

  4337 

  4338 static int bit_tohex(lua_State *L)

  4339 {

  4340   UBits		b		  = barg(L, 1);

  4341   SBits		n		  = lua_isnone(L, 2) ? 8 : (SBits)barg(L, 2);

  4342   const char *hexdigits = "0123456789abcdef";

  4343   char		buf[8];

  4344   int			i;

  4345   if (n < 0) { n = -n; hexdigits = "0123456789ABCDEF"; }

  4346   if (n > 8) n = 8;

  4347   for (i = (int)n; --i >= 0; )

  4348     {

  4349       buf[i] = hexdigits[b & 15]; b >>= 4;

  4350     }

  4351   lua_pushlstring(L, buf, (size_t)n);

  4352   return 1;

  4353 }

  4354 

  4355 static const struct luaL_Reg bit_funcs[] = {

  4356   { "tobit",	 bit_tobit	 },

  4357   { "bnot",	 bit_bnot	 },

  4358   { "band",	 bit_band	 },

  4359   { "bor",	 bit_bor	 },

  4360   { "bxor",	 bit_bxor	 },

  4361   { "lshift",	 bit_lshift	 },

  4362   { "rshift",	 bit_rshift	 },

  4363   { "arshift", bit_arshift },

  4364   { "rol",	 bit_rol	 },

  4365   { "ror",	 bit_ror	 },

  4366   { "bswap",	 bit_bswap	 },

  4367   { "tohex",	 bit_tohex	 },

  4368   { NULL,		 NULL		 }

  4369 };

  4370 

  4371 /* Signed right-shifts are implementation-defined per C89/C99.

  4372 ** But the de facto standard are arithmetic right-shifts on two's

  4373 ** complement CPUs. This behaviour is required here, so test for it.

  4374 */

  4375 #define BAD_SAR     (bsar(-8, 2) != (SBits) - 2)

  4376 

  4377 bool luabitop_validate(lua_State *L) // originally named as luaopen_bit

  4378 {

  4379   UBits b;

  4380   lua_pushnumber(L, (lua_Number)1437217655L);

  4381   b = barg(L, -1);

  4382   if (b != (UBits)1437217655L || BAD_SAR) /* Perform a simple self-test. */

  4383     {

  4384       const char *msg = "compiled with incompatible luaconf.h";

  4385 #ifdef LUA_NUMBER_DOUBLE

  4386 #ifdef WIN32

  4387       if (b == (UBits)1610612736L)

  4388 	msg = "use D3DCREATE_FPU_PRESERVE with DirectX";

  4389 #endif

  4390       if (b == (UBits)1127743488L)

  4391 	msg = "not compiled with SWAPPED_DOUBLE";

  4392 #endif

  4393       if (BAD_SAR)

  4394 	msg = "arithmetic right-shift broken";

  4395       luaL_error(L, "bit library self-test failed (%s)", msg);

  4396       return false;

  4397     }

  4398   return true;

  4399 }

  4400 

  4401 // LuaBitOp ends here

  4402 

  4403 static int bit_bshift_emulua(lua_State *L)

  4404 {

  4405   int shift = luaL_checkinteger(L, 2);

  4406   if (shift < 0)

  4407     {

  4408       lua_pushinteger(L, -shift);

  4409       lua_replace(L, 2);

  4410       return bit_lshift(L);

  4411     }

  4412   else

  4413     return bit_rshift(L);

  4414 }

  4415 

  4416 static int bitbit(lua_State *L)

  4417 {

  4418   int rv		= 0;

  4419   int numArgs = lua_gettop(L);

  4420   for (int i = 1; i <= numArgs; i++)

  4421     {

  4422       int where = luaL_checkinteger(L, i);

  4423       if (where >= 0 && where < 32)

  4424 	rv |= (1 << where);

  4425     }

  4426   lua_settop(L, 0);

  4427   BRET(rv);

  4428 }

  4429 

  4430 // The function called periodically to ensure Lua doesn't run amok.

  4431 static void VBALuaHookFunction(lua_State *L, lua_Debug *dbg)

  4432 {

  4433   if (numTries-- == 0)

  4434     {

  4435       int kill = 0;

  4436 

  4437 #if (defined(WIN32) && !defined(SDL))

  4438       // Uh oh

  4439       theApp.winCheckFullscreen();

  4440       systemSoundClearBuffer();

  4441       int ret = AfxGetApp()->m_pMainWnd->MessageBox(

  4442 						    "The Lua script running has been running a long time. It may have gone crazy. Kill it?\n\n(No = don't check anymore either)",

  4443 						    "Lua Script Gone Nuts?",

  4444 						    MB_YESNO);

  4445 

  4446       if (ret == IDYES)

  4447 	{

  4448 	  kill = 1;

  4449 	}

  4450 

  4451 #else

  4452       fprintf(

  4453 	      stderr,

  4454 	      "The Lua script running has been running a long time.\nIt may have gone crazy. Kill it? (I won't ask again if you say No)\n");

  4455 

  4456       char buffer[64];

  4457       while (true)

  4458 	{

  4459 	  fprintf(stderr, "(y/n): ");

  4460 	  fgets(buffer, sizeof(buffer), stdin);

  4461 	  if (buffer[0] == 'y' || buffer[0] == 'Y')

  4462 	    {

  4463 	      kill = 1;

  4464 	      break;

  4465 	    }

  4466 

  4467 	  if (buffer[0] == 'n' || buffer[0] == 'N')

  4468 	    break;

  4469 	}

  4470 #endif

  4471       if (kill)

  4472 	{

  4473 	  luaL_error(L, "Killed by user request.");

  4474 	  VBALuaOnStop();

  4475 	}

  4476 

  4477       // else, kill the debug hook.

  4478       lua_sethook(L, NULL, 0, 0);

  4479     }

  4480 }

  4481 

  4482 static const struct luaL_reg vbalib[] = {

  4483   //	{"speedmode", vba_speedmode},	// TODO: NYI

  4484   { "frameadvance",	vba_frameadvance	  },

  4485   { "pause",			vba_pause			  },

  4486   { "framecount",		vba_framecount		  },

  4487   { "lagcount",		vba_getlagcount		  },

  4488   { "lagged",			vba_lagged			  },

  4489   { "emulating",		vba_emulating		  },

  4490   { "registerbefore", vba_registerbefore	  },

  4491   { "registerafter",	vba_registerafter	  },

  4492   { "registerexit",	vba_registerexit	  },

  4493   { "message",		vba_message			  },

  4494   { "print",			print				  }, // sure, why not

  4495   { NULL,				NULL				  }

  4496 };

  4497 

  4498 static const struct luaL_reg memorylib[] = {

  4499   { "readbyte",				memory_readbyte				},

  4500   { "readbytesigned",			memory_readbytesigned		},

  4501   { "readword",				memory_readword				},

  4502   { "readwordsigned",			memory_readwordsigned		},

  4503   { "readdword",				memory_readdword			},

  4504   { "readdwordsigned",		memory_readdwordsigned		},

  4505   { "readbyterange",			memory_readbyterange		},

  4506   { "writebyte",				memory_writebyte			},

  4507   { "writeword",				memory_writeword			},

  4508   { "writedword",				memory_writedword			},

  4509   { "getregister",			memory_getregister			},

  4510   { "setregister",			memory_setregister			},

  4511   { "gbromreadbyte",			memory_gbromreadbyte		},

  4512   { "gbromreadbytesigned",	memory_gbromreadbytesigned	},

  4513   { "gbromreadword",			memory_gbromreadword		},

  4514   { "gbromreadwordsigned",	memory_gbromreadwordsigned	},

  4515   { "gbromreaddword",			memory_gbromreaddword		},

  4516   { "gbromreaddwordsigned",	memory_gbromreaddwordsigned	},

  4517   { "gbromreadbyterange",		memory_gbromreadbyterange	},

  4518 

  4519   // alternate naming scheme for word and double-word and unsigned

  4520   { "readbyteunsigned",		memory_readbyte				},

  4521   { "readwordunsigned",		memory_readword				},

  4522   { "readdwordunsigned",		memory_readdword			},

  4523   { "readshort",				memory_readword				},

  4524   { "readshortunsigned",		memory_readword				},

  4525   { "readshortsigned",		memory_readwordsigned		},

  4526   { "readlong",				memory_readdword			},

  4527   { "readlongunsigned",		memory_readdword			},

  4528   { "readlongsigned",			memory_readdwordsigned		},

  4529   { "writeshort",				memory_writeword			},

  4530   { "writelong",				memory_writedword			},

  4531   { "gbromreadbyteunsigned",	memory_gbromreadbyte		},

  4532   { "gbromreadwordunsigned",	memory_gbromreadword		},

  4533   { "gbromreaddwordunsigned",	memory_gbromreaddword		},

  4534   { "gbromreadshort",			memory_gbromreadword		},

  4535   { "gbromreadshortunsigned",	memory_gbromreadword		},

  4536   { "gbromreadshortsigned",	memory_gbromreadwordsigned	},

  4537   { "gbromreadlong",			memory_gbromreaddword		},

  4538   { "gbromreadlongunsigned",	memory_gbromreaddword		},

  4539   { "gbromreadlongsigned",	memory_gbromreaddwordsigned	},

  4540 

  4541   // memory hooks

  4542   { "registerwrite",	   memory_registerwrite			 },

  4543   //{"registerread", memory_registerread},

  4544   { "registerexec",	   memory_registerexec			 },

  4545   // alternate names

  4546   { "register",		   memory_registerwrite			 },

  4547   { "registerrun",	   memory_registerexec			 },

  4548   { "registerexecute",   memory_registerexec			 },

  4549 

  4550   { NULL,				   NULL							 }

  4551 };

  4552 

  4553 static const struct luaL_reg joypadlib[] = {

  4554   { "get",	  joypad_get	  },

  4555   { "getdown",  joypad_getdown  },

  4556   { "getup",	  joypad_getup	  },

  4557   { "set",	  joypad_set	  },

  4558 

  4559   // alternative names

  4560   { "read",	  joypad_get	  },

  4561   { "write",	  joypad_set	  },

  4562   { "readdown", joypad_getdown  },

  4563   { "readup",	  joypad_getup	  },

  4564   { NULL,		  NULL			  }

  4565 };

  4566 

  4567 static const struct luaL_reg savestatelib[] = {

  4568   { "create", savestate_create },

  4569   { "save",	savestate_save	 },

  4570   { "load",	savestate_load	 },

  4571 

  4572   { NULL,		NULL			 }

  4573 };

  4574 

  4575 static const struct luaL_reg movielib[] = {

  4576   { "active",			  movie_isactive				},

  4577   { "recording",		  movie_isrecording				},

  4578   { "playing",		  movie_isplaying				},

  4579   { "mode",			  movie_getmode					},

  4580 

  4581   { "length",			  movie_getlength				},

  4582   { "author",			  movie_getauthor				},

  4583   { "name",			  movie_getfilename				},

  4584   { "rerecordcount",	  movie_rerecordcount			},

  4585   { "setrerecordcount", movie_setrerecordcount		},

  4586 

  4587   { "rerecordcounting", movie_rerecordcounting		},

  4588   { "framecount",		  vba_framecount				}, // for those familiar with

  4589   // other emulators that have

  4590   // movie.framecount()

  4591   // instead of

  4592   // emulatorname.framecount()

  4593 

  4594   { "stop",			  movie_stop					},

  4595 

  4596   // alternative names

  4597   { "close",			  movie_stop					},

  4598   { "getauthor",		  movie_getauthor				},

  4599   { "getname",		  movie_getfilename				},

  4600   { NULL,				  NULL							}

  4601 };

  4602 

  4603 static const struct luaL_reg guilib[] = {

  4604   { "register",	  gui_register		   },

  4605   { "text",		  gui_text			   },

  4606   { "box",		  gui_drawbox		   },

  4607   { "line",		  gui_drawline		   },

  4608   { "pixel",		  gui_drawpixel		   },

  4609   { "opacity",	  gui_setopacity	   },

  4610   { "transparency", gui_transparency	   },

  4611   { "popup",		  gui_popup			   },

  4612   { "parsecolor",	  gui_parsecolor	   },

  4613   { "gdscreenshot", gui_gdscreenshot	   },

  4614   { "gdoverlay",	  gui_gdoverlay		   },

  4615   { "getpixel",	  gui_getpixel		   },

  4616 

  4617   // alternative names

  4618   { "drawtext",	  gui_text			   },

  4619   { "drawbox",	  gui_drawbox		   },

  4620   { "drawline",	  gui_drawline		   },

  4621   { "drawpixel",	  gui_drawpixel		   },

  4622   { "setpixel",	  gui_drawpixel		   },

  4623   { "writepixel",	  gui_drawpixel		   },

  4624   { "rect",		  gui_drawbox		   },

  4625   { "drawrect",	  gui_drawbox		   },

  4626   { "drawimage",	  gui_gdoverlay		   },

  4627   { "image",		  gui_gdoverlay		   },

  4628   { "readpixel",	  gui_getpixel		   },

  4629   { NULL,			  NULL				   }

  4630 };

  4631 

  4632 static const struct luaL_reg inputlib[] = {

  4633   { "get",  input_getcurrentinputstatus  },

  4634 

  4635   // alternative names

  4636   { "read", input_getcurrentinputstatus  },

  4637   { NULL,	  NULL						   }

  4638 };

  4639 

  4640 static const struct luaL_reg soundlib[] = {

  4641   { "get",  sound_get                    },

  4642 

  4643   // alternative names

  4644   { NULL,	  NULL						   }

  4645 };

  4646 

  4647 // gocha: since vba dumps avi so badly,

  4648 // I add avilib as a workaround for enhanced video encoding.

  4649 static const struct luaL_reg avilib[] = {

  4650   { "framecount", avi_framecount },

  4651   { "pause",		avi_pause	   },

  4652   { "resume",		avi_resume	   },

  4653   { NULL,			NULL		   }

  4654 };

  4655 

  4656 void CallExitFunction(void)

  4657 {

  4658   if (!LUA)

  4659     return;

  4660 

  4661   lua_settop(LUA, 0);

  4662   lua_getfield(LUA, LUA_REGISTRYINDEX, luaCallIDStrings[LUACALL_BEFOREEXIT]);

  4663 

  4664   int errorcode = 0;

  4665   if (lua_isfunction(LUA, -1))

  4666     {

  4667       errorcode = lua_pcall(LUA, 0, 0, 0);

  4668     }

  4669 

  4670   if (errorcode)

  4671     HandleCallbackError(LUA);

  4672 }

  4673 

  4674 void VBALuaFrameBoundary(void)

  4675 {

  4676   //	printf("Lua Frame\n");

  4677 

  4678   lua_joypads_used = 0;

  4679 

  4680   // HA!

  4681   if (!LUA || !luaRunning)

  4682     return;

  4683 

  4684   // Our function needs calling

  4685   lua_settop(LUA, 0);

  4686   lua_getfield(LUA, LUA_REGISTRYINDEX, frameAdvanceThread);

  4687 

  4688   lua_State *thread = lua_tothread(LUA, 1);

  4689 

  4690   // Lua calling C must know that we're busy inside a frame boundary

  4691   frameBoundary		= true;

  4692   frameAdvanceWaiting = false;

  4693 

  4694   numTries = 1000;

  4695 

  4696   int result = lua_resume(thread, 0);

  4697 

  4698   if (result == LUA_YIELD)

  4699     {

  4700       // Okay, we're fine with that.

  4701     }

  4702   else if (result != 0)

  4703     {

  4704       // Done execution by bad causes

  4705       VBALuaOnStop();

  4706       lua_pushnil(LUA);

  4707       lua_setfield(LUA, LUA_REGISTRYINDEX, frameAdvanceThread);

  4708       lua_pushnil(LUA);

  4709       lua_setfield(LUA, LUA_REGISTRYINDEX, guiCallbackTable);

  4710 

  4711       // Error?

  4712       //#if (defined(WIN32) && !defined(SDL))

  4713       //		info_print(info_uid, lua_tostring(thread, -1)); //Clear_Sound_Buffer();

  4714       // AfxGetApp()->m_pMainWnd->MessageBox(lua_tostring(thread, -1), "Lua run error", MB_OK | MB_ICONSTOP);

  4715       //#else

  4716       //		fprintf(stderr, "Lua thread bombed out: %s\n", lua_tostring(thread, -1));

  4717       //#endif

  4718       printerror(thread, -1);

  4719     }

  4720   else

  4721     {

  4722       VBALuaOnStop();

  4723       printf("Script died of natural causes.\n");

  4724     }

  4725 

  4726   // Past here, VBA actually runs, so any Lua code is called mid-frame. We must

  4727   // not do anything too stupid, so let ourselves know.

  4728   frameBoundary = false;

  4729 

  4730   if (!frameAdvanceWaiting)

  4731     {

  4732       VBALuaOnStop();

  4733     }

  4734 }

  4735 

  4736 /**

  4737  * Loads and runs the given Lua script.

  4738  * The emulator MUST be paused for this function to be

  4739  * called. Otherwise, all frame boundary assumptions go out the window.

  4740  *

  4741  * Returns true on success, false on failure.

  4742  */

  4743 int VBALoadLuaCode(const char *filename)

  4744 {

  4745   static bool sfmtInitialized = false;

  4746   if (!sfmtInitialized)

  4747     {

  4748       init_gen_rand((unsigned)time(NULL));

  4749       sfmtInitialized = true;

  4750     }

  4751 

  4752   if (filename != luaScriptName)

  4753     {

  4754       if (luaScriptName)

  4755 	free(luaScriptName);

  4756       luaScriptName = strdup(filename);

  4757     }

  4758 

  4759   //stop any lua we might already have had running

  4760   VBALuaStop();

  4761 

  4762   // Set current directory from filename (for dofile)

  4763   char  dir[_MAX_PATH];

  4764   char *slash, *backslash;

  4765   strcpy(dir, filename);

  4766   slash	  = strrchr(dir, '/');

  4767   backslash = strrchr(dir, '\\');

  4768   if (!slash || (backslash && backslash < slash))

  4769     slash = backslash;

  4770   if (slash)

  4771     {

  4772       slash[1] = '\0'; // keep slash itself for some reasons

  4773       chdir(dir);

  4774     }

  4775 

  4776   if (!LUA)

  4777     {

  4778       LUA = lua_open();

  4779       luaL_openlibs(LUA);

  4780 

  4781       luaL_register(LUA, "emu", vbalib); // added for better cross-emulator compatibility

  4782       luaL_register(LUA, "vba", vbalib); // kept for backward compatibility

  4783       luaL_register(LUA, "memory", memorylib);

  4784       luaL_register(LUA, "joypad", joypadlib);

  4785       luaL_register(LUA, "savestate", savestatelib);

  4786       luaL_register(LUA, "movie", movielib);

  4787       luaL_register(LUA, "gui", guilib);

  4788       luaL_register(LUA, "input", inputlib);

  4789       luaL_register(LUA, "sound", soundlib);

  4790       luaL_register(LUA, "bit", bit_funcs); // LuaBitOp library

  4791       luaL_register(LUA, "avi", avilib); // workaround for enhanced video encoding

  4792       lua_settop(LUA, 0); // clean the stack, because each call to luaL_register leaves a table on top

  4793 

  4794       // register a few utility functions outside of libraries (in the global namespace)

  4795       lua_register(LUA, "print", print);

  4796       lua_register(LUA, "tostring", tostring);

  4797       lua_register(LUA, "addressof", addressof);

  4798       lua_register(LUA, "copytable", copytable);

  4799 

  4800       // old bit operation functions

  4801       lua_register(LUA, "AND", bit_band);

  4802       lua_register(LUA, "OR", bit_bor);

  4803       lua_register(LUA, "XOR", bit_bxor);

  4804       lua_register(LUA, "SHIFT", bit_bshift_emulua);

  4805       lua_register(LUA, "BIT", bitbit);

  4806 

  4807       luabitop_validate(LUA);

  4808 

  4809       lua_pushstring(LUA, "math");

  4810       lua_gettable(LUA, LUA_GLOBALSINDEX);

  4811       lua_pushcfunction(LUA, sfmt_random);

  4812       lua_setfield(LUA, -2, "random");

  4813       lua_pushcfunction(LUA, sfmt_randomseed);

  4814       lua_setfield(LUA, -2, "randomseed");

  4815       lua_settop(LUA, 0);

  4816 

  4817       // push arrays for storing hook functions in

  4818       for (int i = 0; i < LUAMEMHOOK_COUNT; i++)

  4819 	{

  4820 	  lua_newtable(LUA);

  4821 	  lua_setfield(LUA, LUA_REGISTRYINDEX, luaMemHookTypeStrings[i]);

  4822 	}

  4823     }

  4824 

  4825   // We make our thread NOW because we want it at the bottom of the stack.

  4826   // If all goes wrong, we let the garbage collector remove it.

  4827   lua_State *thread = lua_newthread(LUA);

  4828 

  4829   // Load the data

  4830   int result = luaL_loadfile(LUA, filename);

  4831 

  4832   if (result)

  4833     {

  4834       //#if (defined(WIN32) && !defined(SDL))

  4835       //		info_print(info_uid, lua_tostring(LUA, -1)); //Clear_Sound_Buffer();

  4836       // AfxGetApp()->m_pMainWnd->MessageBox(lua_tostring(LUA, -1), "Lua load error", MB_OK | MB_ICONSTOP);

  4837       //#else

  4838       //		fprintf(stderr, "Failed to compile file: %s\n", lua_tostring(LUA, -1));

  4839       //#endif

  4840       printerror(LUA, -1);

  4841 

  4842       // Wipe the stack. Our thread

  4843       lua_settop(LUA, 0);

  4844       return 0; // Oh shit.

  4845     }

  4846 

  4847   // Get our function into it

  4848   lua_xmove(LUA, thread, 1);

  4849 

  4850   // Save the thread to the registry. This is why I make the thread FIRST.

  4851   lua_setfield(LUA, LUA_REGISTRYINDEX, frameAdvanceThread);

  4852 

  4853   // Initialize settings

  4854   luaRunning = true;

  4855   skipRerecords		 = false;

  4856   numMemHooks			 = 0;

  4857   transparencyModifier = 255; // opaque

  4858   lua_joypads_used	 = 0; // not used

  4859   //wasPaused = systemIsPaused();

  4860   //systemSetPause(false);

  4861 

  4862   // Set up our protection hook to be executed once every 10,000 bytecode instructions.

  4863   lua_sethook(thread, VBALuaHookFunction, LUA_MASKCOUNT, 10000);

  4864 

  4865 #ifdef WIN32

  4866   info_print	 = PrintToWindowConsole;

  4867   info_onstart = WinLuaOnStart;

  4868   info_onstop	 = WinLuaOnStop;

  4869   if (!LuaConsoleHWnd)

  4870     LuaConsoleHWnd = CreateDialog(AfxGetInstanceHandle(), MAKEINTRESOURCE(IDD_LUA),

  4871 				  AfxGetMainWnd()->GetSafeHwnd(), (DLGPROC) DlgLuaScriptDialog);

  4872   info_uid = (int)LuaConsoleHWnd;

  4873 #else

  4874   info_print	 = NULL;

  4875   info_onstart = NULL;

  4876   info_onstop	 = NULL;

  4877 #endif

  4878   if (info_onstart)

  4879     info_onstart(info_uid);

  4880 

  4881   // And run it right now. :)

  4882   VBALuaFrameBoundary();

  4883   systemRenderFrame();

  4884 

  4885   // We're done.

  4886   return 1;

  4887 }

  4888 

  4889 /**

  4890  * Equivalent to repeating the last VBALoadLuaCode() call.

  4891  */

  4892 int VBAReloadLuaCode(void)

  4893 {

  4894   if (!luaScriptName)

  4895     {

  4896       systemScreenMessage("There's no script to reload.");

  4897       return 0;

  4898     }

  4899   else

  4900     return VBALoadLuaCode(luaScriptName);

  4901 }

  4902 

  4903 /**

  4904  * Terminates a running Lua script by killing the whole Lua engine.

  4905  *

  4906  * Always safe to call, except from within a lua call itself (duh).

  4907  *

  4908  */

  4909 void VBALuaStop(void)

  4910 {

  4911   //already killed

  4912   if (!LUA)

  4913     return;

  4914 

  4915   //execute the user's shutdown callbacks

  4916   CallExitFunction();

  4917 

  4918   /*info.*/ numMemHooks = 0;

  4919   for (int i = 0; i < LUAMEMHOOK_COUNT; i++)

  4920     CalculateMemHookRegions((LuaMemHookType)i);

  4921 

  4922   //sometimes iup uninitializes com

  4923   //MBG TODO - test whether this is really necessary. i dont think it is

  4924 #if (defined(WIN32) && !defined(SDL))

  4925   CoInitialize(0);

  4926 #endif

  4927 

  4928   if (info_onstop)

  4929     info_onstop(info_uid);

  4930 

  4931   //lua_gc(LUA,LUA_GCCOLLECT,0);

  4932   lua_close(LUA); // this invokes our garbage collectors for us

  4933   LUA = NULL;

  4934   VBALuaOnStop();

  4935 }

  4936 

  4937 /**

  4938  * Returns true if there is a Lua script running.

  4939  *

  4940  */

  4941 int VBALuaRunning(void)

  4942 {

  4943   // FIXME: return false when no callback functions are registered.

  4944   return (int) (LUA != NULL); // should return true if callback functions are active.

  4945 }

  4946 

  4947 /**

  4948  * Returns true if Lua would like to steal the given joypad control.

  4949  *

  4950  * Range is 0 through 3

  4951  */

  4952 int VBALuaUsingJoypad(int which)

  4953 {

  4954   if (which < 0 || which > 3)

  4955     which = systemGetDefaultJoypad();

  4956   return lua_joypads_used & (1 << which);

  4957 }

  4958 

  4959 /**

  4960  * Reads the buttons Lua is feeding for the given joypad, in the same

  4961  * format as the OS-specific code.

  4962  *

  4963  * <del>This function must not be called more than once per frame. </del>Ideally exactly once

  4964  * per frame (if VBALuaUsingJoypad says it's safe to do so)

  4965  */

  4966 int VBALuaReadJoypad(int which)

  4967 {

  4968   if (which < 0 || which > 3)

  4969     which = systemGetDefaultJoypad();

  4970 

  4971   //lua_joypads_used &= ~(1 << which);

  4972   return lua_joypads[which];

  4973 }

  4974 

  4975 /**

  4976  * If this function returns true, the movie code should NOT increment

  4977  * the rerecord count for a load-state.

  4978  *

  4979  * This function will not return true if a script is not running.

  4980  */

  4981 bool8 VBALuaRerecordCountSkip(void)

  4982 {

  4983   // FIXME: return true if (there are any active callback functions && skipRerecords)

  4984   return LUA && luaRunning && skipRerecords;

  4985 }

  4986 

  4987 /**

  4988  * Given a screen with the indicated resolution,

  4989  * draw the current GUI onto it.

  4990  */

  4991 void VBALuaGui(uint8 *screen, int ppl, int width, int height)

  4992 {

  4993   if (!LUA /* || !luaRunning*/)

  4994     return;

  4995 

  4996   // First, check if we're being called by anybody

  4997   lua_getfield(LUA, LUA_REGISTRYINDEX, guiCallbackTable);

  4998 

  4999   if (lua_isfunction(LUA, -1))

  5000     {

  5001       // We call it now

  5002       numTries = 1000;

  5003 

  5004       int ret = lua_pcall(LUA, 0, 0, 0);

  5005       if (ret != 0)

  5006 	{

  5007 	  // This is grounds for trashing the function

  5008 	  // Note: This must be done before the messagebox pops up,

  5009 	  //       otherwise the messagebox will cause a paint event which causes a weird

  5010 	  //       infinite call sequence that makes Snes9x silently exit with error code 3,

  5011 	  //       if a Lua GUI function crashes. (nitsuja)

  5012 	  lua_pushnil(LUA);

  5013 	  lua_setfield(LUA, LUA_REGISTRYINDEX, guiCallbackTable);

  5014 

  5015 	  //#if (defined(WIN32) && !defined(SDL))

  5016 	  //			info_print(info_uid, lua_tostring(LUA, -1)); //AfxGetApp()->m_pMainWnd->MessageBox(lua_tostring(LUA, -1), "Lua Error

  5017 	  // in GUI function", MB_OK);

  5018 	  //#else

  5019 	  //			fprintf(stderr, "Lua error in gui.register function: %s\n", lua_tostring(LUA, -1));

  5020 	  //#endif

  5021 	  printerror(LUA, -1);

  5022 	}

  5023     }

  5024 

  5025   // And wreak the stack

  5026   lua_settop(LUA, 0);

  5027 

  5028   if (!gui_used)

  5029     return;

  5030 

  5031   gui_used = false;

  5032 

  5033   int x, y;

  5034 

  5035   //int pitch = (((ppl * systemColorDepth + 7)>>3)+3)&~3;

  5036   int pitch = ppl * (systemColorDepth / 8) + (systemColorDepth == 24 ? 0 : 4);

  5037 

  5038   if (width > LUA_SCREEN_WIDTH)

  5039     width = LUA_SCREEN_WIDTH;

  5040   if (height > LUA_SCREEN_HEIGHT)

  5041     height = LUA_SCREEN_HEIGHT;

  5042 

  5043   GetColorFunc getColor;

  5044   SetColorFunc setColor;

  5045   getColorIOFunc(systemColorDepth, &getColor, &setColor);

  5046 

  5047   for (y = 0; y < height; y++)

  5048     {

  5049       uint8 *scr = &screen[y * pitch];

  5050       for (x = 0; x < width; x++, scr += systemColorDepth / 8)

  5051 	{

  5052 	  const uint8 gui_alpha = gui_data[(y * LUA_SCREEN_WIDTH + x) * 4 + 3];

  5053 	  if (gui_alpha == 0)

  5054 	    {

  5055 	      // do nothing

  5056 	      continue;

  5057 	    }

  5058 

  5059 	  const uint8 gui_red	  = gui_data[(y * LUA_SCREEN_WIDTH + x) * 4 + 2];

  5060 	  const uint8 gui_green = gui_data[(y * LUA_SCREEN_WIDTH + x) * 4 + 1];

  5061 	  const uint8 gui_blue  = gui_data[(y * LUA_SCREEN_WIDTH + x) * 4];

  5062 	  int			red, green, blue;

  5063 

  5064 	  if (gui_alpha == 255)

  5065 	    {

  5066 	      // direct copy

  5067 	      red	  = gui_red;

  5068 	      green = gui_green;

  5069 	      blue  = gui_blue;

  5070 	    }

  5071 	  else

  5072 	    {

  5073 	      // alpha-blending

  5074 	      uint8 scr_red, scr_green, scr_blue;

  5075 	      getColor(scr, &scr_red, &scr_green, &scr_blue);

  5076 	      red	  = (((int)gui_red - scr_red) * gui_alpha / 255 + scr_red) & 255;

  5077 	      green = (((int)gui_green - scr_green) * gui_alpha / 255 + scr_green) & 255;

  5078 	      blue  = (((int)gui_blue - scr_blue) * gui_alpha / 255 + scr_blue) & 255;

  5079 	    }

  5080 

  5081 	  setColor(scr, (uint8) red, (uint8) green, (uint8) blue);

  5082 	}

  5083     }

  5084 

  5085   return;

  5086 }

  5087 

  5088 void VBALuaClearGui(void)

  5089 {

  5090   gui_used = false;

  5091 }

  5092 

  5093 lua_State *VBAGetLuaState()

  5094 {

  5095   return LUA;

  5096 }

  5097 

  5098 char *VBAGetLuaScriptName()

  5099 {

  5100   return luaScriptName;

  5101 }

  5102
author	Robert McIntyre <rlm@mit.edu>
date	Sun, 04 Mar 2012 21:09:22 -0600
parents	59790d015f25
children