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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 this->crashed = !sq_resumecatch(this->vm, suspend);
00192 return this->vm->_suspended != 0;
00193 }
00194
00195 void Squirrel::ResumeError()
00196 {
00197 assert(!this->crashed);
00198 sq_resumeerror(this->vm);
00199 }
00200
00201 void Squirrel::CollectGarbage()
00202 {
00203 sq_collectgarbage(this->vm);
00204 }
00205
00206 bool Squirrel::CallMethod(HSQOBJECT instance, const char *method_name, HSQOBJECT *ret, int suspend)
00207 {
00208 assert(!this->crashed);
00209
00210
00211
00212 SQInteger last_target = this->vm->_suspended_target;
00213
00214 int top = sq_gettop(this->vm);
00215
00216 sq_pushobject(this->vm, instance);
00217
00218 sq_pushstring(this->vm, OTTD2SQ(method_name), -1);
00219 if (SQ_FAILED(sq_get(this->vm, -2))) {
00220 DEBUG(misc, 0, "[squirrel] Could not find '%s' in the class", method_name);
00221 sq_settop(this->vm, top);
00222 return false;
00223 }
00224
00225 sq_pushobject(this->vm, instance);
00226 if (SQ_FAILED(sq_call(this->vm, 1, ret == NULL ? SQFalse : SQTrue, SQTrue, suspend))) return false;
00227 if (ret != NULL) sq_getstackobj(vm, -1, ret);
00228
00229
00230 if (suspend == -1 || !this->IsSuspended()) sq_settop(this->vm, top);
00231
00232 this->vm->_suspended_target = last_target;
00233
00234 return true;
00235 }
00236
00237 bool Squirrel::CallStringMethodStrdup(HSQOBJECT instance, const char *method_name, const char **res, int suspend)
00238 {
00239 HSQOBJECT ret;
00240 if (!this->CallMethod(instance, method_name, &ret, suspend)) return false;
00241 if (ret._type != OT_STRING) return false;
00242 *res = strdup(ObjectToString(&ret));
00243 return true;
00244 }
00245
00246 bool Squirrel::CallIntegerMethod(HSQOBJECT instance, const char *method_name, int *res, int suspend)
00247 {
00248 HSQOBJECT ret;
00249 if (!this->CallMethod(instance, method_name, &ret, suspend)) return false;
00250 if (ret._type != OT_INTEGER) return false;
00251 *res = ObjectToInteger(&ret);
00252 return true;
00253 }
00254
00255 bool Squirrel::CallBoolMethod(HSQOBJECT instance, const char *method_name, bool *res, int suspend)
00256 {
00257 HSQOBJECT ret;
00258 if (!this->CallMethod(instance, method_name, &ret, suspend)) return false;
00259 if (ret._type != OT_BOOL) return false;
00260 *res = ObjectToBool(&ret);
00261 return true;
00262 }
00263
00264 bool Squirrel::CreateClassInstanceVM(HSQUIRRELVM vm, const char *class_name, void *real_instance, HSQOBJECT *instance, SQRELEASEHOOK release_hook)
00265 {
00266 int oldtop = sq_gettop(vm);
00267
00268
00269 sq_pushroottable(vm);
00270 sq_pushstring(vm, OTTD2SQ(class_name), -1);
00271 if (SQ_FAILED(sq_get(vm, -2))) {
00272 DEBUG(misc, 0, "[squirrel] Failed to find class by the name '%s'", class_name);
00273 sq_settop(vm, oldtop);
00274 return false;
00275 }
00276
00277
00278 if (SQ_FAILED(sq_createinstance(vm, -1))) {
00279 DEBUG(misc, 0, "[squirrel] Failed to create instance for class '%s'", class_name);
00280 sq_settop(vm, oldtop);
00281 return false;
00282 }
00283
00284 if (instance != NULL) {
00285
00286 sq_getstackobj(vm, -1, instance);
00287
00288 sq_addref(vm, instance);
00289 }
00290 sq_remove(vm, -2);
00291 sq_remove(vm, -2);
00292
00293
00294 sq_setinstanceup(vm, -1, real_instance);
00295 if (release_hook != NULL) sq_setreleasehook(vm, -1, release_hook);
00296
00297 if (instance != NULL) sq_settop(vm, oldtop);
00298
00299 return true;
00300 }
00301
00302 bool Squirrel::CreateClassInstance(const char *class_name, void *real_instance, HSQOBJECT *instance)
00303 {
00304 return Squirrel::CreateClassInstanceVM(this->vm, class_name, real_instance, instance, NULL);
00305 }
00306
00307 Squirrel::Squirrel()
00308 {
00309 this->vm = sq_open(1024);
00310 this->print_func = NULL;
00311 this->global_pointer = NULL;
00312 this->crashed = false;
00313
00314
00315 sq_setcompilererrorhandler(this->vm, &Squirrel::CompileError);
00316 sq_notifyallexceptions(this->vm, SQTrue);
00317
00318 sq_setprintfunc(this->vm, &Squirrel::PrintFunc);
00319
00320 sq_newclosure(this->vm, &Squirrel::_RunError, 0);
00321 sq_seterrorhandler(this->vm);
00322
00323
00324 sq_setforeignptr(this->vm, this);
00325
00326 sq_pushroottable(this->vm);
00327 squirrel_register_global_std(this);
00328 }
00329
00330 class SQFile {
00331 private:
00332 FILE *file;
00333 size_t size;
00334 size_t pos;
00335
00336 public:
00337 SQFile(FILE *file, size_t size) : file(file), size(size), pos(0) {}
00338
00339 size_t Read(void *buf, size_t elemsize, size_t count)
00340 {
00341 assert(elemsize != 0);
00342 if (this->pos + (elemsize * count) > this->size) {
00343 count = (this->size - this->pos) / elemsize;
00344 }
00345 if (count == 0) return 0;
00346 size_t ret = fread(buf, elemsize, count, this->file);
00347 this->pos += ret * elemsize;
00348 return ret;
00349 }
00350 };
00351
00352 static SQInteger _io_file_lexfeed_ASCII(SQUserPointer file)
00353 {
00354 char c;
00355 if (((SQFile *)file)->Read(&c, sizeof(c), 1) > 0) return c;
00356 return 0;
00357 }
00358
00359 static SQInteger _io_file_lexfeed_UTF8(SQUserPointer file)
00360 {
00361 static const SQInteger utf8_lengths[16] =
00362 {
00363 1, 1, 1, 1, 1, 1, 1, 1,
00364 0, 0, 0, 0,
00365 2, 2,
00366 3,
00367 4
00368 };
00369 static unsigned char byte_masks[5] = {0, 0, 0x1F, 0x0F, 0x07};
00370 unsigned char inchar;
00371 SQInteger c = 0;
00372 if (((SQFile *)file)->Read(&inchar, sizeof(inchar), 1) != 1) return 0;
00373 c = inchar;
00374
00375 if (c >= 0x80) {
00376 SQInteger tmp;
00377 SQInteger codelen = utf8_lengths[c >> 4];
00378 if (codelen == 0) return 0;
00379
00380 tmp = c & byte_masks[codelen];
00381 for (SQInteger n = 0; n < codelen - 1; n++) {
00382 tmp <<= 6;
00383 if (((SQFile *)file)->Read(&inchar, sizeof(inchar), 1) != 1) return 0;
00384 tmp |= inchar & 0x3F;
00385 }
00386 c = tmp;
00387 }
00388 return c;
00389 }
00390
00391 static SQInteger _io_file_lexfeed_UCS2_LE(SQUserPointer file)
00392 {
00393 wchar_t c;
00394 if (((SQFile *)file)->Read(&c, sizeof(c), 1) > 0) return (SQChar)c;
00395 return 0;
00396 }
00397
00398 static SQInteger _io_file_lexfeed_UCS2_BE(SQUserPointer file)
00399 {
00400 unsigned short c;
00401 if (((SQFile *)file)->Read(&c, sizeof(c), 1) > 0) {
00402 c = ((c >> 8) & 0x00FF)| ((c << 8) & 0xFF00);
00403 return (SQChar)c;
00404 }
00405 return 0;
00406 }
00407
00408 static SQInteger _io_file_read(SQUserPointer file, SQUserPointer buf, SQInteger size)
00409 {
00410 SQInteger ret = ((SQFile *)file)->Read(buf, 1, size);
00411 if (ret == 0) return -1;
00412 return ret;
00413 }
00414
00415 SQRESULT Squirrel::LoadFile(HSQUIRRELVM vm, const char *filename, SQBool printerror)
00416 {
00417 size_t size;
00418 FILE *file = FioFOpenFile(filename, "rb", AI_DIR, &size);
00419 SQInteger ret;
00420 unsigned short us;
00421 unsigned char uc;
00422 SQLEXREADFUNC func;
00423
00424 if (file != NULL) {
00425 SQFile f(file, size);
00426 ret = fread(&us, 1, sizeof(us), file);
00427
00428 if (ret != 2) us = 0;
00429
00430 switch (us) {
00431 case SQ_BYTECODE_STREAM_TAG: {
00432 fseek(file, -2, SEEK_CUR);
00433 if (SQ_SUCCEEDED(sq_readclosure(vm, _io_file_read, &f))) {
00434 FioFCloseFile(file);
00435 return SQ_OK;
00436 }
00437 FioFCloseFile(file);
00438 return sq_throwerror(vm, _SC("Couldn't read bytecode"));
00439 }
00440 case 0xFFFE: func = _io_file_lexfeed_UCS2_BE; break;
00441 case 0xFEFF: func = _io_file_lexfeed_UCS2_LE; break;
00442 case 0xBBEF:
00443 if (fread(&uc, 1, sizeof(uc), file) == 0) {
00444 FioFCloseFile(file);
00445 return sq_throwerror(vm, _SC("I/O error"));
00446 }
00447 if (uc != 0xBF) {
00448 FioFCloseFile(file);
00449 return sq_throwerror(vm, _SC("Unrecognized encoding"));
00450 }
00451 func = _io_file_lexfeed_UTF8;
00452 break;
00453 default: func = _io_file_lexfeed_ASCII; fseek(file, -2, SEEK_CUR); break;
00454 }
00455
00456 if (SQ_SUCCEEDED(sq_compile(vm, func, &f, OTTD2SQ(filename), printerror))) {
00457 FioFCloseFile(file);
00458 return SQ_OK;
00459 }
00460 FioFCloseFile(file);
00461 return SQ_ERROR;
00462 }
00463 return sq_throwerror(vm, _SC("cannot open the file"));
00464 }
00465
00466 bool Squirrel::LoadScript(HSQUIRRELVM vm, const char *script, bool in_root)
00467 {
00468
00469 if (in_root) sq_pushroottable(vm);
00470
00471
00472 if (SQ_SUCCEEDED(LoadFile(vm, script, SQTrue))) {
00473 sq_push(vm, -2);
00474 if (SQ_SUCCEEDED(sq_call(vm, 1, SQFalse, SQTrue, 100000))) {
00475 sq_pop(vm, 1);
00476 return true;
00477 }
00478 }
00479
00480 DEBUG(misc, 0, "[squirrel] Failed to compile '%s'", script);
00481 return false;
00482 }
00483
00484 bool Squirrel::LoadScript(const char *script)
00485 {
00486 return LoadScript(this->vm, script);
00487 }
00488
00489 Squirrel::~Squirrel()
00490 {
00491
00492 sq_pop(this->vm, 1);
00493 sq_close(this->vm);
00494 }
00495
00496 void Squirrel::InsertResult(bool result)
00497 {
00498 sq_pushbool(this->vm, result);
00499 vm->GetAt(vm->_stackbase + vm->_suspended_target) = vm->GetUp(-1);
00500 vm->Pop();
00501 }
00502
00503 void Squirrel::InsertResult(int result)
00504 {
00505 sq_pushinteger(this->vm, result);
00506 vm->GetAt(vm->_stackbase + vm->_suspended_target) = vm->GetUp(-1);
00507 vm->Pop();
00508 }
00509
00510 void Squirrel::DecreaseOps(HSQUIRRELVM vm, int ops)
00511 {
00512 vm->DecreaseOps(ops);
00513 }
00514
00515 bool Squirrel::IsSuspended()
00516 {
00517 return this->vm->_suspended != 0;
00518 }
00519
00520 bool Squirrel::HasScriptCrashed()
00521 {
00522 return this->crashed;
00523 }
00524
00525 void Squirrel::ResetCrashed()
00526 {
00527 this->crashed = false;
00528 }
00529
00530 void Squirrel::CrashOccurred()
00531 {
00532 this->crashed = true;
00533 }
00534
00535 bool Squirrel::CanSuspend()
00536 {
00537 return sq_can_suspend(this->vm);
00538 }