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00012 #include <stdarg.h>
00013 #include "../stdafx.h"
00014 #include "../debug.h"
00015 #include "squirrel_std.hpp"
00016 #include "../fileio_func.h"
00017 #include <sqstdaux.h>
00018 #include <../squirrel/sqpcheader.h>
00019 #include <../squirrel/sqvm.h>
00020
00021 void Squirrel::CompileError(HSQUIRRELVM vm, const SQChar *desc, const SQChar *source, SQInteger line, SQInteger column)
00022 {
00023 SQChar buf[1024];
00024
00025 #ifdef _SQ64
00026 scsnprintf(buf, lengthof(buf), _SC("Error %s:%ld/%ld: %s"), source, line, column, desc);
00027 #else
00028 scsnprintf(buf, lengthof(buf), _SC("Error %s:%d/%d: %s"), source, line, column, desc);
00029 #endif
00030
00031
00032 Squirrel *engine = (Squirrel *)sq_getforeignptr(vm);
00033 engine->crashed = true;
00034 SQPrintFunc *func = engine->print_func;
00035 if (func == NULL) {
00036 scfprintf(stderr, _SC("%s"), buf);
00037 } else {
00038 (*func)(true, buf);
00039 }
00040 }
00041
00042 void Squirrel::ErrorPrintFunc(HSQUIRRELVM vm, const SQChar *s, ...)
00043 {
00044 va_list arglist;
00045 SQChar buf[1024];
00046
00047 va_start(arglist, s);
00048 scvsnprintf(buf, lengthof(buf), s, arglist);
00049 va_end(arglist);
00050
00051
00052 SQPrintFunc *func = ((Squirrel *)sq_getforeignptr(vm))->print_func;
00053 if (func == NULL) {
00054 scfprintf(stderr, _SC("%s"), buf);
00055 } else {
00056 (*func)(true, buf);
00057 }
00058 }
00059
00060 void Squirrel::RunError(HSQUIRRELVM vm, const SQChar *error)
00061 {
00062
00063 SQPRINTFUNCTION pf = sq_getprintfunc(vm);
00064 sq_setprintfunc(vm, &Squirrel::ErrorPrintFunc);
00065
00066
00067 SQChar buf[1024];
00068 scsnprintf(buf, lengthof(buf), _SC("Your script made an error: %s\n"), error);
00069 Squirrel *engine = (Squirrel *)sq_getforeignptr(vm);
00070 SQPrintFunc *func = engine->print_func;
00071 if (func == NULL) {
00072 scfprintf(stderr, _SC("%s"), buf);
00073 } else {
00074 (*func)(true, buf);
00075 }
00076
00077
00078 sqstd_printcallstack(vm);
00079
00080 sq_setprintfunc(vm, pf);
00081 }
00082
00083 SQInteger Squirrel::_RunError(HSQUIRRELVM vm)
00084 {
00085 const SQChar *sErr = 0;
00086
00087 if (sq_gettop(vm) >= 1) {
00088 if (SQ_SUCCEEDED(sq_getstring(vm, -1, &sErr))) {
00089 Squirrel::RunError(vm, sErr);
00090 return 0;
00091 }
00092 }
00093
00094 Squirrel::RunError(vm, _SC("unknown error"));
00095 return 0;
00096 }
00097
00098 void Squirrel::PrintFunc(HSQUIRRELVM vm, const SQChar *s, ...)
00099 {
00100 va_list arglist;
00101 SQChar buf[1024];
00102
00103 va_start(arglist, s);
00104 scvsnprintf(buf, lengthof(buf) - 2, s, arglist);
00105 va_end(arglist);
00106 scstrcat(buf, _SC("\n"));
00107
00108
00109 SQPrintFunc *func = ((Squirrel *)sq_getforeignptr(vm))->print_func;
00110 if (func == NULL) {
00111 scprintf(_SC("%s"), buf);
00112 } else {
00113 (*func)(false, buf);
00114 }
00115 }
00116
00117 void Squirrel::AddMethod(const char *method_name, SQFUNCTION proc, uint nparam, const char *params, void *userdata, int size)
00118 {
00119 sq_pushstring(this->vm, OTTD2SQ(method_name), -1);
00120
00121 if (size != 0) {
00122 void *ptr = sq_newuserdata(vm, size);
00123 memcpy(ptr, userdata, size);
00124 }
00125
00126 sq_newclosure(this->vm, proc, size != 0 ? 1 : 0);
00127 if (nparam != 0) sq_setparamscheck(this->vm, nparam, OTTD2SQ(params));
00128 sq_setnativeclosurename(this->vm, -1, OTTD2SQ(method_name));
00129 sq_newslot(this->vm, -3, SQFalse);
00130 }
00131
00132 void Squirrel::AddConst(const char *var_name, int value)
00133 {
00134 sq_pushstring(this->vm, OTTD2SQ(var_name), -1);
00135 sq_pushinteger(this->vm, value);
00136 sq_newslot(this->vm, -3, SQTrue);
00137 }
00138
00139 void Squirrel::AddConst(const char *var_name, bool value)
00140 {
00141 sq_pushstring(this->vm, OTTD2SQ(var_name), -1);
00142 sq_pushbool(this->vm, value);
00143 sq_newslot(this->vm, -3, SQTrue);
00144 }
00145
00146 void Squirrel::AddClassBegin(const char *class_name)
00147 {
00148 sq_pushroottable(this->vm);
00149 sq_pushstring(this->vm, OTTD2SQ(class_name), -1);
00150 sq_newclass(this->vm, SQFalse);
00151 }
00152
00153 void Squirrel::AddClassBegin(const char *class_name, const char *parent_class)
00154 {
00155 sq_pushroottable(this->vm);
00156 sq_pushstring(this->vm, OTTD2SQ(class_name), -1);
00157 sq_pushstring(this->vm, OTTD2SQ(parent_class), -1);
00158 if (SQ_FAILED(sq_get(this->vm, -3))) {
00159 DEBUG(misc, 0, "[squirrel] Failed to initialize class '%s' based on parent class '%s'", class_name, parent_class);
00160 DEBUG(misc, 0, "[squirrel] Make sure that '%s' exists before trying to define '%s'", parent_class, class_name);
00161 return;
00162 }
00163 sq_newclass(this->vm, SQTrue);
00164 }
00165
00166 void Squirrel::AddClassEnd()
00167 {
00168 sq_newslot(vm, -3, SQFalse);
00169 sq_pop(vm, 1);
00170 }
00171
00172 bool Squirrel::MethodExists(HSQOBJECT instance, const char *method_name)
00173 {
00174 assert(!this->crashed);
00175 int top = sq_gettop(this->vm);
00176
00177 sq_pushobject(this->vm, instance);
00178
00179 sq_pushstring(this->vm, OTTD2SQ(method_name), -1);
00180 if (SQ_FAILED(sq_get(this->vm, -2))) {
00181 sq_settop(this->vm, top);
00182 return false;
00183 }
00184 sq_settop(this->vm, top);
00185 return true;
00186 }
00187
00188 bool Squirrel::Resume(int suspend)
00189 {
00190 assert(!this->crashed);
00191
00192
00193 if (this->overdrawn_ops > 0 && suspend > 0) {
00194 this->overdrawn_ops -= suspend;
00195
00196 if (this->overdrawn_ops >= 0) return true;
00197
00198
00199 suspend = -this->overdrawn_ops;
00200 }
00201
00202 this->crashed = !sq_resumecatch(this->vm, suspend);
00203 this->overdrawn_ops = -this->vm->_ops_till_suspend;
00204 return this->vm->_suspended != 0;
00205 }
00206
00207 void Squirrel::ResumeError()
00208 {
00209 assert(!this->crashed);
00210 sq_resumeerror(this->vm);
00211 }
00212
00213 void Squirrel::CollectGarbage()
00214 {
00215 sq_collectgarbage(this->vm);
00216 }
00217
00218 bool Squirrel::CallMethod(HSQOBJECT instance, const char *method_name, HSQOBJECT *ret, int suspend)
00219 {
00220 assert(!this->crashed);
00221
00222
00223
00224 SQInteger last_target = this->vm->_suspended_target;
00225
00226 int top = sq_gettop(this->vm);
00227
00228 sq_pushobject(this->vm, instance);
00229
00230 sq_pushstring(this->vm, OTTD2SQ(method_name), -1);
00231 if (SQ_FAILED(sq_get(this->vm, -2))) {
00232 DEBUG(misc, 0, "[squirrel] Could not find '%s' in the class", method_name);
00233 sq_settop(this->vm, top);
00234 return false;
00235 }
00236
00237 sq_pushobject(this->vm, instance);
00238 if (SQ_FAILED(sq_call(this->vm, 1, ret == NULL ? SQFalse : SQTrue, SQTrue, suspend))) return false;
00239 if (ret != NULL) sq_getstackobj(vm, -1, ret);
00240
00241
00242 if (suspend == -1 || !this->IsSuspended()) sq_settop(this->vm, top);
00243
00244 this->vm->_suspended_target = last_target;
00245
00246 return true;
00247 }
00248
00249 bool Squirrel::CallStringMethodStrdup(HSQOBJECT instance, const char *method_name, const char **res, int suspend)
00250 {
00251 HSQOBJECT ret;
00252 if (!this->CallMethod(instance, method_name, &ret, suspend)) return false;
00253 if (ret._type != OT_STRING) return false;
00254 *res = strdup(ObjectToString(&ret));
00255 return true;
00256 }
00257
00258 bool Squirrel::CallIntegerMethod(HSQOBJECT instance, const char *method_name, int *res, int suspend)
00259 {
00260 HSQOBJECT ret;
00261 if (!this->CallMethod(instance, method_name, &ret, suspend)) return false;
00262 if (ret._type != OT_INTEGER) return false;
00263 *res = ObjectToInteger(&ret);
00264 return true;
00265 }
00266
00267 bool Squirrel::CallBoolMethod(HSQOBJECT instance, const char *method_name, bool *res, int suspend)
00268 {
00269 HSQOBJECT ret;
00270 if (!this->CallMethod(instance, method_name, &ret, suspend)) return false;
00271 if (ret._type != OT_BOOL) return false;
00272 *res = ObjectToBool(&ret);
00273 return true;
00274 }
00275
00276 bool Squirrel::CreateClassInstanceVM(HSQUIRRELVM vm, const char *class_name, void *real_instance, HSQOBJECT *instance, SQRELEASEHOOK release_hook)
00277 {
00278 int oldtop = sq_gettop(vm);
00279
00280
00281 sq_pushroottable(vm);
00282 sq_pushstring(vm, OTTD2SQ(class_name), -1);
00283 if (SQ_FAILED(sq_get(vm, -2))) {
00284 DEBUG(misc, 0, "[squirrel] Failed to find class by the name '%s'", class_name);
00285 sq_settop(vm, oldtop);
00286 return false;
00287 }
00288
00289
00290 if (SQ_FAILED(sq_createinstance(vm, -1))) {
00291 DEBUG(misc, 0, "[squirrel] Failed to create instance for class '%s'", class_name);
00292 sq_settop(vm, oldtop);
00293 return false;
00294 }
00295
00296 if (instance != NULL) {
00297
00298 sq_getstackobj(vm, -1, instance);
00299
00300 sq_addref(vm, instance);
00301 }
00302 sq_remove(vm, -2);
00303 sq_remove(vm, -2);
00304
00305
00306 sq_setinstanceup(vm, -1, real_instance);
00307 if (release_hook != NULL) sq_setreleasehook(vm, -1, release_hook);
00308
00309 if (instance != NULL) sq_settop(vm, oldtop);
00310
00311 return true;
00312 }
00313
00314 bool Squirrel::CreateClassInstance(const char *class_name, void *real_instance, HSQOBJECT *instance)
00315 {
00316 return Squirrel::CreateClassInstanceVM(this->vm, class_name, real_instance, instance, NULL);
00317 }
00318
00319 Squirrel::Squirrel()
00320 {
00321 this->vm = sq_open(1024);
00322 this->print_func = NULL;
00323 this->global_pointer = NULL;
00324 this->crashed = false;
00325 this->overdrawn_ops = 0;
00326
00327
00328 sq_setcompilererrorhandler(this->vm, &Squirrel::CompileError);
00329 sq_notifyallexceptions(this->vm, SQTrue);
00330
00331 sq_setprintfunc(this->vm, &Squirrel::PrintFunc);
00332
00333 sq_newclosure(this->vm, &Squirrel::_RunError, 0);
00334 sq_seterrorhandler(this->vm);
00335
00336
00337 sq_setforeignptr(this->vm, this);
00338
00339 sq_pushroottable(this->vm);
00340 squirrel_register_global_std(this);
00341 }
00342
00343 class SQFile {
00344 private:
00345 FILE *file;
00346 size_t size;
00347 size_t pos;
00348
00349 public:
00350 SQFile(FILE *file, size_t size) : file(file), size(size), pos(0) {}
00351
00352 size_t Read(void *buf, size_t elemsize, size_t count)
00353 {
00354 assert(elemsize != 0);
00355 if (this->pos + (elemsize * count) > this->size) {
00356 count = (this->size - this->pos) / elemsize;
00357 }
00358 if (count == 0) return 0;
00359 size_t ret = fread(buf, elemsize, count, this->file);
00360 this->pos += ret * elemsize;
00361 return ret;
00362 }
00363 };
00364
00365 static SQInteger _io_file_lexfeed_ASCII(SQUserPointer file)
00366 {
00367 char c;
00368 if (((SQFile *)file)->Read(&c, sizeof(c), 1) > 0) return c;
00369 return 0;
00370 }
00371
00372 static SQInteger _io_file_lexfeed_UTF8(SQUserPointer file)
00373 {
00374 static const SQInteger utf8_lengths[16] =
00375 {
00376 1, 1, 1, 1, 1, 1, 1, 1,
00377 0, 0, 0, 0,
00378 2, 2,
00379 3,
00380 4
00381 };
00382 static unsigned char byte_masks[5] = {0, 0, 0x1F, 0x0F, 0x07};
00383 unsigned char inchar;
00384 SQInteger c = 0;
00385 if (((SQFile *)file)->Read(&inchar, sizeof(inchar), 1) != 1) return 0;
00386 c = inchar;
00387
00388 if (c >= 0x80) {
00389 SQInteger tmp;
00390 SQInteger codelen = utf8_lengths[c >> 4];
00391 if (codelen == 0) return 0;
00392
00393 tmp = c & byte_masks[codelen];
00394 for (SQInteger n = 0; n < codelen - 1; n++) {
00395 tmp <<= 6;
00396 if (((SQFile *)file)->Read(&inchar, sizeof(inchar), 1) != 1) return 0;
00397 tmp |= inchar & 0x3F;
00398 }
00399 c = tmp;
00400 }
00401 return c;
00402 }
00403
00404 static SQInteger _io_file_lexfeed_UCS2_LE(SQUserPointer file)
00405 {
00406 wchar_t c;
00407 if (((SQFile *)file)->Read(&c, sizeof(c), 1) > 0) return (SQChar)c;
00408 return 0;
00409 }
00410
00411 static SQInteger _io_file_lexfeed_UCS2_BE(SQUserPointer file)
00412 {
00413 unsigned short c;
00414 if (((SQFile *)file)->Read(&c, sizeof(c), 1) > 0) {
00415 c = ((c >> 8) & 0x00FF)| ((c << 8) & 0xFF00);
00416 return (SQChar)c;
00417 }
00418 return 0;
00419 }
00420
00421 static SQInteger _io_file_read(SQUserPointer file, SQUserPointer buf, SQInteger size)
00422 {
00423 SQInteger ret = ((SQFile *)file)->Read(buf, 1, size);
00424 if (ret == 0) return -1;
00425 return ret;
00426 }
00427
00428 SQRESULT Squirrel::LoadFile(HSQUIRRELVM vm, const char *filename, SQBool printerror)
00429 {
00430 size_t size;
00431 FILE *file = FioFOpenFile(filename, "rb", AI_DIR, &size);
00432 SQInteger ret;
00433 unsigned short us;
00434 unsigned char uc;
00435 SQLEXREADFUNC func;
00436
00437 if (file != NULL) {
00438 SQFile f(file, size);
00439 ret = fread(&us, 1, sizeof(us), file);
00440
00441 if (ret != 2) us = 0;
00442
00443 switch (us) {
00444 case SQ_BYTECODE_STREAM_TAG: {
00445 fseek(file, -2, SEEK_CUR);
00446 if (SQ_SUCCEEDED(sq_readclosure(vm, _io_file_read, &f))) {
00447 FioFCloseFile(file);
00448 return SQ_OK;
00449 }
00450 FioFCloseFile(file);
00451 return sq_throwerror(vm, _SC("Couldn't read bytecode"));
00452 }
00453 case 0xFFFE: func = _io_file_lexfeed_UCS2_BE; break;
00454 case 0xFEFF: func = _io_file_lexfeed_UCS2_LE; break;
00455 case 0xBBEF:
00456 if (fread(&uc, 1, sizeof(uc), file) == 0) {
00457 FioFCloseFile(file);
00458 return sq_throwerror(vm, _SC("I/O error"));
00459 }
00460 if (uc != 0xBF) {
00461 FioFCloseFile(file);
00462 return sq_throwerror(vm, _SC("Unrecognized encoding"));
00463 }
00464 func = _io_file_lexfeed_UTF8;
00465 break;
00466 default: func = _io_file_lexfeed_ASCII; fseek(file, -2, SEEK_CUR); break;
00467 }
00468
00469 if (SQ_SUCCEEDED(sq_compile(vm, func, &f, OTTD2SQ(filename), printerror))) {
00470 FioFCloseFile(file);
00471 return SQ_OK;
00472 }
00473 FioFCloseFile(file);
00474 return SQ_ERROR;
00475 }
00476 return sq_throwerror(vm, _SC("cannot open the file"));
00477 }
00478
00479 bool Squirrel::LoadScript(HSQUIRRELVM vm, const char *script, bool in_root)
00480 {
00481
00482 if (in_root) sq_pushroottable(vm);
00483
00484
00485 if (SQ_SUCCEEDED(LoadFile(vm, script, SQTrue))) {
00486 sq_push(vm, -2);
00487 if (SQ_SUCCEEDED(sq_call(vm, 1, SQFalse, SQTrue, 100000))) {
00488 sq_pop(vm, 1);
00489 return true;
00490 }
00491 }
00492
00493 DEBUG(misc, 0, "[squirrel] Failed to compile '%s'", script);
00494 return false;
00495 }
00496
00497 bool Squirrel::LoadScript(const char *script)
00498 {
00499 return LoadScript(this->vm, script);
00500 }
00501
00502 Squirrel::~Squirrel()
00503 {
00504
00505 sq_pop(this->vm, 1);
00506 sq_close(this->vm);
00507 }
00508
00509 void Squirrel::InsertResult(bool result)
00510 {
00511 sq_pushbool(this->vm, result);
00512 vm->GetAt(vm->_stackbase + vm->_suspended_target) = vm->GetUp(-1);
00513 vm->Pop();
00514 }
00515
00516 void Squirrel::InsertResult(int result)
00517 {
00518 sq_pushinteger(this->vm, result);
00519 vm->GetAt(vm->_stackbase + vm->_suspended_target) = vm->GetUp(-1);
00520 vm->Pop();
00521 }
00522
00523 void Squirrel::DecreaseOps(HSQUIRRELVM vm, int ops)
00524 {
00525 vm->DecreaseOps(ops);
00526 }
00527
00528 bool Squirrel::IsSuspended()
00529 {
00530 return this->vm->_suspended != 0;
00531 }
00532
00533 bool Squirrel::HasScriptCrashed()
00534 {
00535 return this->crashed;
00536 }
00537
00538 void Squirrel::ResetCrashed()
00539 {
00540 this->crashed = false;
00541 }
00542
00543 void Squirrel::CrashOccurred()
00544 {
00545 this->crashed = true;
00546 }
00547
00548 bool Squirrel::CanSuspend()
00549 {
00550 return sq_can_suspend(this->vm);
00551 }