00001
00002
00005 #include <squirrel.h>
00006 #include <stdarg.h>
00007 #include "../stdafx.h"
00008 #include "../debug.h"
00009 #include "squirrel.hpp"
00010 #include "squirrel_std.hpp"
00011 #include "../fileio_func.h"
00012 #include <sqstdaux.h>
00013 #include <../squirrel/sqpcheader.h>
00014 #include <../squirrel/sqvm.h>
00015
00016 void Squirrel::CompileError(HSQUIRRELVM vm, const SQChar *desc, const SQChar *source, SQInteger line, SQInteger column)
00017 {
00018 SQChar buf[1024];
00019
00020 #ifdef _SQ64
00021 scsnprintf(buf, lengthof(buf), _SC("Error %s:%ld/%ld: %s"), source, line, column, desc);
00022 #else
00023 scsnprintf(buf, lengthof(buf), _SC("Error %s:%d/%d: %s"), source, line, column, desc);
00024 #endif
00025
00026
00027 Squirrel *engine = (Squirrel *)sq_getforeignptr(vm);
00028 engine->crashed = true;
00029 SQPrintFunc *func = engine->print_func;
00030 if (func == NULL) {
00031 scfprintf(stderr, _SC("%s"), buf);
00032 } else {
00033 (*func)(true, buf);
00034 }
00035 }
00036
00037 void Squirrel::ErrorPrintFunc(HSQUIRRELVM vm, const SQChar *s, ...)
00038 {
00039 va_list arglist;
00040 SQChar buf[1024];
00041
00042 va_start(arglist, s);
00043 scvsnprintf(buf, lengthof(buf), s, arglist);
00044 va_end(arglist);
00045
00046
00047 SQPrintFunc *func = ((Squirrel *)sq_getforeignptr(vm))->print_func;
00048 if (func == NULL) {
00049 scfprintf(stderr, _SC("%s"), buf);
00050 } else {
00051 (*func)(true, buf);
00052 }
00053 }
00054
00055 void Squirrel::RunError(HSQUIRRELVM vm, const SQChar *error)
00056 {
00057
00058 SQPRINTFUNCTION pf = sq_getprintfunc(vm);
00059 sq_setprintfunc(vm, &Squirrel::ErrorPrintFunc);
00060
00061
00062 SQChar buf[1024];
00063 scsnprintf(buf, lengthof(buf), _SC("Your script made an error: %s\n"), error);
00064 Squirrel *engine = (Squirrel *)sq_getforeignptr(vm);
00065 engine->crashed = true;
00066 SQPrintFunc *func = engine->print_func;
00067 if (func == NULL) {
00068 scfprintf(stderr, _SC("%s"), buf);
00069 } else {
00070 (*func)(true, buf);
00071 }
00072
00073
00074 sqstd_printcallstack(vm);
00075
00076 sq_setprintfunc(vm, pf);
00077 }
00078
00079 SQInteger Squirrel::_RunError(HSQUIRRELVM vm)
00080 {
00081 const SQChar *sErr = 0;
00082
00083 if (sq_gettop(vm) >= 1) {
00084 if (SQ_SUCCEEDED(sq_getstring(vm, -1, &sErr))) {
00085 Squirrel::RunError(vm, sErr);
00086 return 0;
00087 }
00088 }
00089
00090 Squirrel::RunError(vm, _SC("unknown error"));
00091 return 0;
00092 }
00093
00094 void Squirrel::PrintFunc(HSQUIRRELVM vm, const SQChar *s, ...)
00095 {
00096 va_list arglist;
00097 SQChar buf[1024];
00098
00099 va_start(arglist, s);
00100 scvsnprintf(buf, lengthof(buf) - 2, s, arglist);
00101 va_end(arglist);
00102 scstrcat(buf, _SC("\n"));
00103
00104
00105 SQPrintFunc *func = ((Squirrel *)sq_getforeignptr(vm))->print_func;
00106 if (func == NULL) {
00107 scprintf(_SC("%s"), buf);
00108 } else {
00109 (*func)(false, buf);
00110 }
00111 }
00112
00113 void Squirrel::AddMethod(const char *method_name, SQFUNCTION proc, uint nparam, const char *params, void *userdata, int size)
00114 {
00115 sq_pushstring(this->vm, OTTD2FS(method_name), -1);
00116
00117 if (size != 0) {
00118 void *ptr = sq_newuserdata(vm, size);
00119 memcpy(ptr, userdata, size);
00120 }
00121
00122 sq_newclosure(this->vm, proc, size != 0 ? 1 : 0);
00123 if (nparam != 0) sq_setparamscheck(this->vm, nparam, OTTD2FS(params));
00124 sq_setnativeclosurename(this->vm, -1, OTTD2FS(method_name));
00125 sq_newslot(this->vm, -3, SQFalse);
00126 }
00127
00128 void Squirrel::AddConst(const char *var_name, int value)
00129 {
00130 sq_pushstring(this->vm, OTTD2FS(var_name), -1);
00131 sq_pushinteger(this->vm, value);
00132 sq_newslot(this->vm, -3, SQTrue);
00133 }
00134
00135 void Squirrel::AddClassBegin(const char *class_name)
00136 {
00137 sq_pushroottable(this->vm);
00138 sq_pushstring(this->vm, OTTD2FS(class_name), -1);
00139 sq_newclass(this->vm, SQFalse);
00140 }
00141
00142 void Squirrel::AddClassBegin(const char *class_name, const char *parent_class)
00143 {
00144 sq_pushroottable(this->vm);
00145 sq_pushstring(this->vm, OTTD2FS(class_name), -1);
00146 sq_pushstring(this->vm, OTTD2FS(parent_class), -1);
00147 if (SQ_FAILED(sq_get(this->vm, -3))) {
00148 DEBUG(misc, 0, "[squirrel] Failed to initialize class '%s' based on parent class '%s'", class_name, parent_class);
00149 DEBUG(misc, 0, "[squirrel] Make sure that '%s' exists before trying to define '%s'", parent_class, class_name);
00150 return;
00151 }
00152 sq_newclass(this->vm, SQTrue);
00153 }
00154
00155 void Squirrel::AddClassEnd()
00156 {
00157 sq_newslot(vm, -3, SQFalse);
00158 sq_pop(vm, 1);
00159 }
00160
00161 bool Squirrel::MethodExists(HSQOBJECT instance, const char *method_name)
00162 {
00163 assert(!this->crashed);
00164 int top = sq_gettop(this->vm);
00165
00166 sq_pushobject(this->vm, instance);
00167
00168 sq_pushstring(this->vm, OTTD2FS(method_name), -1);
00169 if (SQ_FAILED(sq_get(this->vm, -2))) {
00170 sq_settop(this->vm, top);
00171 return false;
00172 }
00173 sq_settop(this->vm, top);
00174 return true;
00175 }
00176
00177 bool Squirrel::Resume(int suspend)
00178 {
00179 assert(!this->crashed);
00180 sq_resumecatch(this->vm, suspend);
00181 return this->vm->_suspended != 0;
00182 }
00183
00184 void Squirrel::CollectGarbage()
00185 {
00186 sq_collectgarbage(this->vm);
00187 }
00188
00189 bool Squirrel::CallMethod(HSQOBJECT instance, const char *method_name, HSQOBJECT *ret, int suspend)
00190 {
00191 assert(!this->crashed);
00192
00193
00194
00195 SQInteger last_target = this->vm->_suspended_target;
00196
00197 int top = sq_gettop(this->vm);
00198
00199 sq_pushobject(this->vm, instance);
00200
00201 sq_pushstring(this->vm, OTTD2FS(method_name), -1);
00202 if (SQ_FAILED(sq_get(this->vm, -2))) {
00203 DEBUG(misc, 0, "[squirrel] Could not find '%s' in the class", method_name);
00204 sq_settop(this->vm, top);
00205 return false;
00206 }
00207
00208 sq_pushobject(this->vm, instance);
00209 if (SQ_FAILED(sq_call(this->vm, 1, ret == NULL ? SQFalse : SQTrue, SQTrue, suspend))) return false;
00210 if (ret != NULL) sq_getstackobj(vm, -1, ret);
00211
00212
00213 if (suspend == -1) sq_settop(this->vm, top);
00214
00215 this->vm->_suspended_target = last_target;
00216
00217 return true;
00218 }
00219
00220 bool Squirrel::CallStringMethodStrdup(HSQOBJECT instance, const char *method_name, const char **res, int suspend)
00221 {
00222 HSQOBJECT ret;
00223 if (!this->CallMethod(instance, method_name, &ret, suspend)) return false;
00224 if (ret._type != OT_STRING) return false;
00225 *res = strdup(ObjectToString(&ret));
00226 return true;
00227 }
00228
00229 bool Squirrel::CallIntegerMethod(HSQOBJECT instance, const char *method_name, int *res, int suspend)
00230 {
00231 HSQOBJECT ret;
00232 if (!this->CallMethod(instance, method_name, &ret, suspend)) return false;
00233 if (ret._type != OT_INTEGER) return false;
00234 *res = ObjectToInteger(&ret);
00235 return true;
00236 }
00237
00238 bool Squirrel::CreateClassInstanceVM(HSQUIRRELVM vm, const char *class_name, void *real_instance, HSQOBJECT *instance, SQRELEASEHOOK release_hook)
00239 {
00240 int oldtop = sq_gettop(vm);
00241
00242
00243 sq_pushroottable(vm);
00244 sq_pushstring(vm, OTTD2FS(class_name), -1);
00245 if (SQ_FAILED(sq_get(vm, -2))) {
00246 DEBUG(misc, 0, "[squirrel] Failed to find class by the name '%s'", class_name);
00247 sq_settop(vm, oldtop);
00248 return false;
00249 }
00250
00251
00252 if (SQ_FAILED(sq_createinstance(vm, -1))) {
00253 DEBUG(misc, 0, "[squirrel] Failed to create instance for class '%s'", class_name);
00254 sq_settop(vm, oldtop);
00255 return false;
00256 }
00257
00258 if (instance != NULL) {
00259
00260 sq_getstackobj(vm, -1, instance);
00261
00262 sq_addref(vm, instance);
00263 }
00264 sq_remove(vm, -2);
00265 sq_remove(vm, -2);
00266
00267
00268 sq_setinstanceup(vm, -1, real_instance);
00269 if (release_hook != NULL) sq_setreleasehook(vm, -1, release_hook);
00270
00271 if (instance != NULL) sq_settop(vm, oldtop);
00272
00273 return true;
00274 }
00275
00276 bool Squirrel::CreateClassInstance(const char *class_name, void *real_instance, HSQOBJECT *instance)
00277 {
00278 return Squirrel::CreateClassInstanceVM(this->vm, class_name, real_instance, instance, NULL);
00279 }
00280
00281 Squirrel::Squirrel()
00282 {
00283 this->vm = sq_open(1024);
00284 this->print_func = NULL;
00285 this->global_pointer = NULL;
00286 this->crashed = false;
00287
00288
00289 sq_setcompilererrorhandler(this->vm, &Squirrel::CompileError);
00290 sq_notifyallexceptions(this->vm, SQTrue);
00291
00292 sq_setprintfunc(this->vm, &Squirrel::PrintFunc);
00293
00294 sq_newclosure(this->vm, &Squirrel::_RunError, 0);
00295 sq_seterrorhandler(this->vm);
00296
00297
00298 sq_setforeignptr(this->vm, this);
00299
00300 sq_pushroottable(this->vm);
00301 squirrel_register_global_std(this);
00302 }
00303
00304 class SQFile {
00305 private:
00306 FILE *file;
00307 size_t size;
00308 size_t pos;
00309
00310 public:
00311 SQFile(FILE *file, size_t size) : file(file), size(size), pos(0) {}
00312
00313 size_t Read(void *buf, size_t elemsize, size_t count)
00314 {
00315 assert(elemsize != 0);
00316 if (this->pos + (elemsize * count) > this->size) {
00317 count = (this->size - this->pos) / elemsize;
00318 }
00319 if (count == 0) return 0;
00320 size_t ret = fread(buf, elemsize, count, this->file);
00321 this->pos += ret * elemsize;
00322 return ret;
00323 }
00324 };
00325
00326 static SQInteger _io_file_lexfeed_ASCII(SQUserPointer file)
00327 {
00328 char c;
00329 if (((SQFile *)file)->Read(&c, sizeof(c), 1) > 0) return c;
00330 return 0;
00331 }
00332
00333 static SQInteger _io_file_lexfeed_UTF8(SQUserPointer file)
00334 {
00335 static const SQInteger utf8_lengths[16] =
00336 {
00337 1, 1, 1, 1, 1, 1, 1, 1,
00338 0, 0, 0, 0,
00339 2, 2,
00340 3,
00341 4
00342 };
00343 static unsigned char byte_masks[5] = {0, 0, 0x1F, 0x0F, 0x07};
00344 unsigned char inchar;
00345 SQInteger c = 0;
00346 if (((SQFile *)file)->Read(&inchar, sizeof(inchar), 1) != 1) return 0;
00347 c = inchar;
00348
00349 if (c >= 0x80) {
00350 SQInteger tmp;
00351 SQInteger codelen = utf8_lengths[c >> 4];
00352 if (codelen == 0) return 0;
00353
00354 tmp = c & byte_masks[codelen];
00355 for (SQInteger n = 0; n < codelen - 1; n++) {
00356 tmp <<= 6;
00357 if (((SQFile *)file)->Read(&inchar, sizeof(inchar), 1) != 1) return 0;
00358 tmp |= inchar & 0x3F;
00359 }
00360 c = tmp;
00361 }
00362 return c;
00363 }
00364
00365 static SQInteger _io_file_lexfeed_UCS2_LE(SQUserPointer file)
00366 {
00367 wchar_t c;
00368 if (((SQFile *)file)->Read(&c, sizeof(c), 1) > 0) return (SQChar)c;
00369 return 0;
00370 }
00371
00372 static SQInteger _io_file_lexfeed_UCS2_BE(SQUserPointer file)
00373 {
00374 unsigned short c;
00375 if (((SQFile *)file)->Read(&c, sizeof(c), 1) > 0) {
00376 c = ((c >> 8) & 0x00FF)| ((c << 8) & 0xFF00);
00377 return (SQChar)c;
00378 }
00379 return 0;
00380 }
00381
00382 static SQInteger _io_file_read(SQUserPointer file, SQUserPointer buf, SQInteger size)
00383 {
00384 SQInteger ret = ((SQFile *)file)->Read(buf, 1, size);
00385 if (ret == 0) return -1;
00386 return ret;
00387 }
00388
00389 SQRESULT Squirrel::LoadFile(HSQUIRRELVM vm, const char *filename, SQBool printerror)
00390 {
00391 size_t size;
00392 FILE *file = FioFOpenFile(filename, "rb", AI_DIR, &size);
00393 SQInteger ret;
00394 unsigned short us;
00395 unsigned char uc;
00396 SQLEXREADFUNC func;
00397
00398 if (file != NULL) {
00399 SQFile f(file, size);
00400 ret = fread(&us, 1, sizeof(us), file);
00401
00402 if (ret != 2) us = 0;
00403
00404 switch (us) {
00405 case SQ_BYTECODE_STREAM_TAG: {
00406 fseek(file, -2, SEEK_CUR);
00407 if (SQ_SUCCEEDED(sq_readclosure(vm, _io_file_read, &f))) {
00408 FioFCloseFile(file);
00409 return SQ_OK;
00410 }
00411 FioFCloseFile(file);
00412 return sq_throwerror(vm, _SC("Couldn't read bytecode"));
00413 }
00414 case 0xFFFE: func = _io_file_lexfeed_UCS2_BE; break;
00415 case 0xFEFF: func = _io_file_lexfeed_UCS2_LE; break;
00416 case 0xBBEF:
00417 if (fread(&uc, 1, sizeof(uc), file) == 0) {
00418 FioFCloseFile(file);
00419 return sq_throwerror(vm, _SC("I/O error"));
00420 }
00421 if (uc != 0xBF) {
00422 FioFCloseFile(file);
00423 return sq_throwerror(vm, _SC("Unrecognized encoding"));
00424 }
00425 func = _io_file_lexfeed_UTF8;
00426 break;
00427 default: func = _io_file_lexfeed_ASCII; fseek(file, -2, SEEK_CUR); break;
00428 }
00429
00430 if (SQ_SUCCEEDED(sq_compile(vm, func, &f, OTTD2FS(filename), printerror))) {
00431 FioFCloseFile(file);
00432 return SQ_OK;
00433 }
00434 FioFCloseFile(file);
00435 return SQ_ERROR;
00436 }
00437 return sq_throwerror(vm, _SC("cannot open the file"));
00438 }
00439
00440 bool Squirrel::LoadScript(HSQUIRRELVM vm, const char *script, bool in_root)
00441 {
00442
00443 if (in_root) sq_pushroottable(vm);
00444
00445
00446 if (SQ_SUCCEEDED(LoadFile(vm, script, SQTrue))) {
00447 sq_push(vm, -2);
00448 if (SQ_SUCCEEDED(sq_call(vm, 1, SQFalse, SQTrue))) {
00449 sq_pop(vm, 1);
00450 return true;
00451 }
00452 }
00453
00454 DEBUG(misc, 0, "[squirrel] Failed to compile '%s'", script);
00455 return false;
00456 }
00457
00458 bool Squirrel::LoadScript(const char *script)
00459 {
00460 return LoadScript(this->vm, script);
00461 }
00462
00463 Squirrel::~Squirrel()
00464 {
00465
00466 sq_pop(this->vm, 1);
00467 sq_close(this->vm);
00468 }
00469
00470 void Squirrel::InsertResult(bool result)
00471 {
00472 sq_pushbool(this->vm, result);
00473 vm->GetAt(vm->_stackbase + vm->_suspended_target) = vm->GetUp(-1);
00474 vm->Pop();
00475 }
00476
00477 void Squirrel::InsertResult(int result)
00478 {
00479 sq_pushinteger(this->vm, result);
00480 vm->GetAt(vm->_stackbase + vm->_suspended_target) = vm->GetUp(-1);
00481 vm->Pop();
00482 }
00483
00484 void Squirrel::DecreaseOps(HSQUIRRELVM vm, int ops)
00485 {
00486 vm->DecreaseOps(ops);
00487 }
00488
00489 bool Squirrel::IsSuspended()
00490 {
00491 return this->vm->_suspended != 0;
00492 }
00493
00494 bool Squirrel::HasScriptCrashed()
00495 {
00496 return this->crashed;
00497 }
00498
00499 void Squirrel::ResetCrashed()
00500 {
00501 this->crashed = false;
00502 }