LLVM API Documentation
00001 //===-- ExternalFunctions.cpp - Implement External Functions --------------===// 00002 // 00003 // The LLVM Compiler Infrastructure 00004 // 00005 // This file was developed by the LLVM research group and is distributed under 00006 // the University of Illinois Open Source License. See LICENSE.TXT for details. 00007 // 00008 //===----------------------------------------------------------------------===// 00009 // 00010 // This file contains both code to deal with invoking "external" functions, but 00011 // also contains code that implements "exported" external functions. 00012 // 00013 // External functions in the interpreter are implemented by 00014 // using the system's dynamic loader to look up the address of the function 00015 // we want to invoke. If a function is found, then one of the 00016 // many lle_* wrapper functions in this file will translate its arguments from 00017 // GenericValues to the types the function is actually expecting, before the 00018 // function is called. 00019 // 00020 //===----------------------------------------------------------------------===// 00021 00022 #include "Interpreter.h" 00023 #include "llvm/DerivedTypes.h" 00024 #include "llvm/Module.h" 00025 #include "llvm/System/DynamicLibrary.h" 00026 #include "llvm/Target/TargetData.h" 00027 #include <cmath> 00028 #include <csignal> 00029 #include <map> 00030 using std::vector; 00031 00032 using namespace llvm; 00033 00034 typedef GenericValue (*ExFunc)(FunctionType *, const vector<GenericValue> &); 00035 static std::map<const Function *, ExFunc> Functions; 00036 static std::map<std::string, ExFunc> FuncNames; 00037 00038 static Interpreter *TheInterpreter; 00039 00040 static char getTypeID(const Type *Ty) { 00041 switch (Ty->getTypeID()) { 00042 case Type::VoidTyID: return 'V'; 00043 case Type::BoolTyID: return 'o'; 00044 case Type::UByteTyID: return 'B'; 00045 case Type::SByteTyID: return 'b'; 00046 case Type::UShortTyID: return 'S'; 00047 case Type::ShortTyID: return 's'; 00048 case Type::UIntTyID: return 'I'; 00049 case Type::IntTyID: return 'i'; 00050 case Type::ULongTyID: return 'L'; 00051 case Type::LongTyID: return 'l'; 00052 case Type::FloatTyID: return 'F'; 00053 case Type::DoubleTyID: return 'D'; 00054 case Type::PointerTyID: return 'P'; 00055 case Type::FunctionTyID: return 'M'; 00056 case Type::StructTyID: return 'T'; 00057 case Type::ArrayTyID: return 'A'; 00058 case Type::OpaqueTyID: return 'O'; 00059 default: return 'U'; 00060 } 00061 } 00062 00063 static ExFunc lookupFunction(const Function *F) { 00064 // Function not found, look it up... start by figuring out what the 00065 // composite function name should be. 00066 std::string ExtName = "lle_"; 00067 const FunctionType *FT = F->getFunctionType(); 00068 for (unsigned i = 0, e = FT->getNumContainedTypes(); i != e; ++i) 00069 ExtName += getTypeID(FT->getContainedType(i)); 00070 ExtName += "_" + F->getName(); 00071 00072 ExFunc FnPtr = FuncNames[ExtName]; 00073 if (FnPtr == 0) 00074 FnPtr = (ExFunc)sys::DynamicLibrary::SearchForAddressOfSymbol(ExtName); 00075 if (FnPtr == 0) 00076 FnPtr = FuncNames["lle_X_"+F->getName()]; 00077 if (FnPtr == 0) // Try calling a generic function... if it exists... 00078 FnPtr = (ExFunc)sys::DynamicLibrary::SearchForAddressOfSymbol( 00079 ("lle_X_"+F->getName()).c_str()); 00080 if (FnPtr != 0) 00081 Functions.insert(std::make_pair(F, FnPtr)); // Cache for later 00082 return FnPtr; 00083 } 00084 00085 GenericValue Interpreter::callExternalFunction(Function *F, 00086 const std::vector<GenericValue> &ArgVals) { 00087 TheInterpreter = this; 00088 00089 // Do a lookup to see if the function is in our cache... this should just be a 00090 // deferred annotation! 00091 std::map<const Function *, ExFunc>::iterator FI = Functions.find(F); 00092 ExFunc Fn = (FI == Functions.end()) ? lookupFunction(F) : FI->second; 00093 if (Fn == 0) { 00094 std::cout << "Tried to execute an unknown external function: " 00095 << F->getType()->getDescription() << " " << F->getName() << "\n"; 00096 if (F->getName() == "__main") 00097 return GenericValue(); 00098 abort(); 00099 } 00100 00101 // TODO: FIXME when types are not const! 00102 GenericValue Result = Fn(const_cast<FunctionType*>(F->getFunctionType()), 00103 ArgVals); 00104 return Result; 00105 } 00106 00107 00108 //===----------------------------------------------------------------------===// 00109 // Functions "exported" to the running application... 00110 // 00111 extern "C" { // Don't add C++ manglings to llvm mangling :) 00112 00113 // void putchar(sbyte) 00114 GenericValue lle_Vb_putchar(FunctionType *M, const vector<GenericValue> &Args) { 00115 std::cout << Args[0].SByteVal; 00116 return GenericValue(); 00117 } 00118 00119 // int putchar(int) 00120 GenericValue lle_ii_putchar(FunctionType *M, const vector<GenericValue> &Args) { 00121 std::cout << ((char)Args[0].IntVal) << std::flush; 00122 return Args[0]; 00123 } 00124 00125 // void putchar(ubyte) 00126 GenericValue lle_VB_putchar(FunctionType *M, const vector<GenericValue> &Args) { 00127 std::cout << Args[0].SByteVal << std::flush; 00128 return Args[0]; 00129 } 00130 00131 // void atexit(Function*) 00132 GenericValue lle_X_atexit(FunctionType *M, const vector<GenericValue> &Args) { 00133 assert(Args.size() == 1); 00134 TheInterpreter->addAtExitHandler((Function*)GVTOP(Args[0])); 00135 GenericValue GV; 00136 GV.IntVal = 0; 00137 return GV; 00138 } 00139 00140 // void exit(int) 00141 GenericValue lle_X_exit(FunctionType *M, const vector<GenericValue> &Args) { 00142 TheInterpreter->exitCalled(Args[0]); 00143 return GenericValue(); 00144 } 00145 00146 // void abort(void) 00147 GenericValue lle_X_abort(FunctionType *M, const vector<GenericValue> &Args) { 00148 raise (SIGABRT); 00149 return GenericValue(); 00150 } 00151 00152 // void *malloc(uint) 00153 GenericValue lle_X_malloc(FunctionType *M, const vector<GenericValue> &Args) { 00154 assert(Args.size() == 1 && "Malloc expects one argument!"); 00155 return PTOGV(malloc(Args[0].UIntVal)); 00156 } 00157 00158 // void *calloc(uint, uint) 00159 GenericValue lle_X_calloc(FunctionType *M, const vector<GenericValue> &Args) { 00160 assert(Args.size() == 2 && "calloc expects two arguments!"); 00161 return PTOGV(calloc(Args[0].UIntVal, Args[1].UIntVal)); 00162 } 00163 00164 // void free(void *) 00165 GenericValue lle_X_free(FunctionType *M, const vector<GenericValue> &Args) { 00166 assert(Args.size() == 1); 00167 free(GVTOP(Args[0])); 00168 return GenericValue(); 00169 } 00170 00171 // int atoi(char *) 00172 GenericValue lle_X_atoi(FunctionType *M, const vector<GenericValue> &Args) { 00173 assert(Args.size() == 1); 00174 GenericValue GV; 00175 GV.IntVal = atoi((char*)GVTOP(Args[0])); 00176 return GV; 00177 } 00178 00179 // double pow(double, double) 00180 GenericValue lle_X_pow(FunctionType *M, const vector<GenericValue> &Args) { 00181 assert(Args.size() == 2); 00182 GenericValue GV; 00183 GV.DoubleVal = pow(Args[0].DoubleVal, Args[1].DoubleVal); 00184 return GV; 00185 } 00186 00187 // double exp(double) 00188 GenericValue lle_X_exp(FunctionType *M, const vector<GenericValue> &Args) { 00189 assert(Args.size() == 1); 00190 GenericValue GV; 00191 GV.DoubleVal = exp(Args[0].DoubleVal); 00192 return GV; 00193 } 00194 00195 // double sqrt(double) 00196 GenericValue lle_X_sqrt(FunctionType *M, const vector<GenericValue> &Args) { 00197 assert(Args.size() == 1); 00198 GenericValue GV; 00199 GV.DoubleVal = sqrt(Args[0].DoubleVal); 00200 return GV; 00201 } 00202 00203 // double log(double) 00204 GenericValue lle_X_log(FunctionType *M, const vector<GenericValue> &Args) { 00205 assert(Args.size() == 1); 00206 GenericValue GV; 00207 GV.DoubleVal = log(Args[0].DoubleVal); 00208 return GV; 00209 } 00210 00211 // double floor(double) 00212 GenericValue lle_X_floor(FunctionType *M, const vector<GenericValue> &Args) { 00213 assert(Args.size() == 1); 00214 GenericValue GV; 00215 GV.DoubleVal = floor(Args[0].DoubleVal); 00216 return GV; 00217 } 00218 00219 #ifdef HAVE_RAND48 00220 00221 // double drand48() 00222 GenericValue lle_X_drand48(FunctionType *M, const vector<GenericValue> &Args) { 00223 assert(Args.size() == 0); 00224 GenericValue GV; 00225 GV.DoubleVal = drand48(); 00226 return GV; 00227 } 00228 00229 // long lrand48() 00230 GenericValue lle_X_lrand48(FunctionType *M, const vector<GenericValue> &Args) { 00231 assert(Args.size() == 0); 00232 GenericValue GV; 00233 GV.IntVal = lrand48(); 00234 return GV; 00235 } 00236 00237 // void srand48(long) 00238 GenericValue lle_X_srand48(FunctionType *M, const vector<GenericValue> &Args) { 00239 assert(Args.size() == 1); 00240 srand48(Args[0].IntVal); 00241 return GenericValue(); 00242 } 00243 00244 #endif 00245 00246 // int rand() 00247 GenericValue lle_X_rand(FunctionType *M, const vector<GenericValue> &Args) { 00248 assert(Args.size() == 0); 00249 GenericValue GV; 00250 GV.IntVal = rand(); 00251 return GV; 00252 } 00253 00254 // void srand(uint) 00255 GenericValue lle_X_srand(FunctionType *M, const vector<GenericValue> &Args) { 00256 assert(Args.size() == 1); 00257 srand(Args[0].UIntVal); 00258 return GenericValue(); 00259 } 00260 00261 // int puts(const char*) 00262 GenericValue lle_X_puts(FunctionType *M, const vector<GenericValue> &Args) { 00263 assert(Args.size() == 1); 00264 GenericValue GV; 00265 GV.IntVal = puts((char*)GVTOP(Args[0])); 00266 return GV; 00267 } 00268 00269 // int sprintf(sbyte *, sbyte *, ...) - a very rough implementation to make 00270 // output useful. 00271 GenericValue lle_X_sprintf(FunctionType *M, const vector<GenericValue> &Args) { 00272 char *OutputBuffer = (char *)GVTOP(Args[0]); 00273 const char *FmtStr = (const char *)GVTOP(Args[1]); 00274 unsigned ArgNo = 2; 00275 00276 // printf should return # chars printed. This is completely incorrect, but 00277 // close enough for now. 00278 GenericValue GV; GV.IntVal = strlen(FmtStr); 00279 while (1) { 00280 switch (*FmtStr) { 00281 case 0: return GV; // Null terminator... 00282 default: // Normal nonspecial character 00283 sprintf(OutputBuffer++, "%c", *FmtStr++); 00284 break; 00285 case '\\': { // Handle escape codes 00286 sprintf(OutputBuffer, "%c%c", *FmtStr, *(FmtStr+1)); 00287 FmtStr += 2; OutputBuffer += 2; 00288 break; 00289 } 00290 case '%': { // Handle format specifiers 00291 char FmtBuf[100] = "", Buffer[1000] = ""; 00292 char *FB = FmtBuf; 00293 *FB++ = *FmtStr++; 00294 char Last = *FB++ = *FmtStr++; 00295 unsigned HowLong = 0; 00296 while (Last != 'c' && Last != 'd' && Last != 'i' && Last != 'u' && 00297 Last != 'o' && Last != 'x' && Last != 'X' && Last != 'e' && 00298 Last != 'E' && Last != 'g' && Last != 'G' && Last != 'f' && 00299 Last != 'p' && Last != 's' && Last != '%') { 00300 if (Last == 'l' || Last == 'L') HowLong++; // Keep track of l's 00301 Last = *FB++ = *FmtStr++; 00302 } 00303 *FB = 0; 00304 00305 switch (Last) { 00306 case '%': 00307 sprintf(Buffer, FmtBuf); break; 00308 case 'c': 00309 sprintf(Buffer, FmtBuf, Args[ArgNo++].IntVal); break; 00310 case 'd': case 'i': 00311 case 'u': case 'o': 00312 case 'x': case 'X': 00313 if (HowLong >= 1) { 00314 if (HowLong == 1 && 00315 TheInterpreter->getModule().getPointerSize()==Module::Pointer64 && 00316 sizeof(long) < sizeof(long long)) { 00317 // Make sure we use %lld with a 64 bit argument because we might be 00318 // compiling LLI on a 32 bit compiler. 00319 unsigned Size = strlen(FmtBuf); 00320 FmtBuf[Size] = FmtBuf[Size-1]; 00321 FmtBuf[Size+1] = 0; 00322 FmtBuf[Size-1] = 'l'; 00323 } 00324 sprintf(Buffer, FmtBuf, Args[ArgNo++].ULongVal); 00325 } else 00326 sprintf(Buffer, FmtBuf, Args[ArgNo++].IntVal); break; 00327 case 'e': case 'E': case 'g': case 'G': case 'f': 00328 sprintf(Buffer, FmtBuf, Args[ArgNo++].DoubleVal); break; 00329 case 'p': 00330 sprintf(Buffer, FmtBuf, (void*)GVTOP(Args[ArgNo++])); break; 00331 case 's': 00332 sprintf(Buffer, FmtBuf, (char*)GVTOP(Args[ArgNo++])); break; 00333 default: std::cout << "<unknown printf code '" << *FmtStr << "'!>"; 00334 ArgNo++; break; 00335 } 00336 strcpy(OutputBuffer, Buffer); 00337 OutputBuffer += strlen(Buffer); 00338 } 00339 break; 00340 } 00341 } 00342 } 00343 00344 // int printf(sbyte *, ...) - a very rough implementation to make output useful. 00345 GenericValue lle_X_printf(FunctionType *M, const vector<GenericValue> &Args) { 00346 char Buffer[10000]; 00347 vector<GenericValue> NewArgs; 00348 NewArgs.push_back(PTOGV(Buffer)); 00349 NewArgs.insert(NewArgs.end(), Args.begin(), Args.end()); 00350 GenericValue GV = lle_X_sprintf(M, NewArgs); 00351 std::cout << Buffer; 00352 return GV; 00353 } 00354 00355 static void ByteswapSCANFResults(const char *Fmt, void *Arg0, void *Arg1, 00356 void *Arg2, void *Arg3, void *Arg4, void *Arg5, 00357 void *Arg6, void *Arg7, void *Arg8) { 00358 void *Args[] = { Arg0, Arg1, Arg2, Arg3, Arg4, Arg5, Arg6, Arg7, Arg8, 0 }; 00359 00360 // Loop over the format string, munging read values as appropriate (performs 00361 // byteswaps as necessary). 00362 unsigned ArgNo = 0; 00363 while (*Fmt) { 00364 if (*Fmt++ == '%') { 00365 // Read any flag characters that may be present... 00366 bool Suppress = false; 00367 bool Half = false; 00368 bool Long = false; 00369 bool LongLong = false; // long long or long double 00370 00371 while (1) { 00372 switch (*Fmt++) { 00373 case '*': Suppress = true; break; 00374 case 'a': /*Allocate = true;*/ break; // We don't need to track this 00375 case 'h': Half = true; break; 00376 case 'l': Long = true; break; 00377 case 'q': 00378 case 'L': LongLong = true; break; 00379 default: 00380 if (Fmt[-1] > '9' || Fmt[-1] < '0') // Ignore field width specs 00381 goto Out; 00382 } 00383 } 00384 Out: 00385 00386 // Read the conversion character 00387 if (!Suppress && Fmt[-1] != '%') { // Nothing to do? 00388 unsigned Size = 0; 00389 const Type *Ty = 0; 00390 00391 switch (Fmt[-1]) { 00392 case 'i': case 'o': case 'u': case 'x': case 'X': case 'n': case 'p': 00393 case 'd': 00394 if (Long || LongLong) { 00395 Size = 8; Ty = Type::ULongTy; 00396 } else if (Half) { 00397 Size = 4; Ty = Type::UShortTy; 00398 } else { 00399 Size = 4; Ty = Type::UIntTy; 00400 } 00401 break; 00402 00403 case 'e': case 'g': case 'E': 00404 case 'f': 00405 if (Long || LongLong) { 00406 Size = 8; Ty = Type::DoubleTy; 00407 } else { 00408 Size = 4; Ty = Type::FloatTy; 00409 } 00410 break; 00411 00412 case 's': case 'c': case '[': // No byteswap needed 00413 Size = 1; 00414 Ty = Type::SByteTy; 00415 break; 00416 00417 default: break; 00418 } 00419 00420 if (Size) { 00421 GenericValue GV; 00422 void *Arg = Args[ArgNo++]; 00423 memcpy(&GV, Arg, Size); 00424 TheInterpreter->StoreValueToMemory(GV, (GenericValue*)Arg, Ty); 00425 } 00426 } 00427 } 00428 } 00429 } 00430 00431 // int sscanf(const char *format, ...); 00432 GenericValue lle_X_sscanf(FunctionType *M, const vector<GenericValue> &args) { 00433 assert(args.size() < 10 && "Only handle up to 10 args to sscanf right now!"); 00434 00435 char *Args[10]; 00436 for (unsigned i = 0; i < args.size(); ++i) 00437 Args[i] = (char*)GVTOP(args[i]); 00438 00439 GenericValue GV; 00440 GV.IntVal = sscanf(Args[0], Args[1], Args[2], Args[3], Args[4], 00441 Args[5], Args[6], Args[7], Args[8], Args[9]); 00442 ByteswapSCANFResults(Args[1], Args[2], Args[3], Args[4], 00443 Args[5], Args[6], Args[7], Args[8], Args[9], 0); 00444 return GV; 00445 } 00446 00447 // int scanf(const char *format, ...); 00448 GenericValue lle_X_scanf(FunctionType *M, const vector<GenericValue> &args) { 00449 assert(args.size() < 10 && "Only handle up to 10 args to scanf right now!"); 00450 00451 char *Args[10]; 00452 for (unsigned i = 0; i < args.size(); ++i) 00453 Args[i] = (char*)GVTOP(args[i]); 00454 00455 GenericValue GV; 00456 GV.IntVal = scanf(Args[0], Args[1], Args[2], Args[3], Args[4], 00457 Args[5], Args[6], Args[7], Args[8], Args[9]); 00458 ByteswapSCANFResults(Args[0], Args[1], Args[2], Args[3], Args[4], 00459 Args[5], Args[6], Args[7], Args[8], Args[9]); 00460 return GV; 00461 } 00462 00463 00464 // int clock(void) - Profiling implementation 00465 GenericValue lle_i_clock(FunctionType *M, const vector<GenericValue> &Args) { 00466 extern unsigned int clock(void); 00467 GenericValue GV; GV.IntVal = clock(); 00468 return GV; 00469 } 00470 00471 00472 //===----------------------------------------------------------------------===// 00473 // String Functions... 00474 //===----------------------------------------------------------------------===// 00475 00476 // int strcmp(const char *S1, const char *S2); 00477 GenericValue lle_X_strcmp(FunctionType *M, const vector<GenericValue> &Args) { 00478 assert(Args.size() == 2); 00479 GenericValue Ret; 00480 Ret.IntVal = strcmp((char*)GVTOP(Args[0]), (char*)GVTOP(Args[1])); 00481 return Ret; 00482 } 00483 00484 // char *strcat(char *Dest, const char *src); 00485 GenericValue lle_X_strcat(FunctionType *M, const vector<GenericValue> &Args) { 00486 assert(Args.size() == 2); 00487 return PTOGV(strcat((char*)GVTOP(Args[0]), (char*)GVTOP(Args[1]))); 00488 } 00489 00490 // char *strcpy(char *Dest, const char *src); 00491 GenericValue lle_X_strcpy(FunctionType *M, const vector<GenericValue> &Args) { 00492 assert(Args.size() == 2); 00493 return PTOGV(strcpy((char*)GVTOP(Args[0]), (char*)GVTOP(Args[1]))); 00494 } 00495 00496 static GenericValue size_t_to_GV (size_t n) { 00497 GenericValue Ret; 00498 if (sizeof (size_t) == sizeof (uint64_t)) { 00499 Ret.ULongVal = n; 00500 } else { 00501 assert (sizeof (size_t) == sizeof (unsigned int)); 00502 Ret.UIntVal = n; 00503 } 00504 return Ret; 00505 } 00506 00507 static size_t GV_to_size_t (GenericValue GV) { 00508 size_t count; 00509 if (sizeof (size_t) == sizeof (uint64_t)) { 00510 count = (size_t)GV.ULongVal; 00511 } else { 00512 assert (sizeof (size_t) == sizeof (unsigned int)); 00513 count = (size_t)GV.UIntVal; 00514 } 00515 return count; 00516 } 00517 00518 // size_t strlen(const char *src); 00519 GenericValue lle_X_strlen(FunctionType *M, const vector<GenericValue> &Args) { 00520 assert(Args.size() == 1); 00521 size_t strlenResult = strlen ((char *) GVTOP (Args[0])); 00522 return size_t_to_GV (strlenResult); 00523 } 00524 00525 // char *strdup(const char *src); 00526 GenericValue lle_X_strdup(FunctionType *M, const vector<GenericValue> &Args) { 00527 assert(Args.size() == 1); 00528 return PTOGV(strdup((char*)GVTOP(Args[0]))); 00529 } 00530 00531 // char *__strdup(const char *src); 00532 GenericValue lle_X___strdup(FunctionType *M, const vector<GenericValue> &Args) { 00533 assert(Args.size() == 1); 00534 return PTOGV(strdup((char*)GVTOP(Args[0]))); 00535 } 00536 00537 // void *memset(void *S, int C, size_t N) 00538 GenericValue lle_X_memset(FunctionType *M, const vector<GenericValue> &Args) { 00539 assert(Args.size() == 3); 00540 size_t count = GV_to_size_t (Args[2]); 00541 return PTOGV(memset(GVTOP(Args[0]), Args[1].IntVal, count)); 00542 } 00543 00544 // void *memcpy(void *Dest, void *src, size_t Size); 00545 GenericValue lle_X_memcpy(FunctionType *M, const vector<GenericValue> &Args) { 00546 assert(Args.size() == 3); 00547 size_t count = GV_to_size_t (Args[2]); 00548 return PTOGV(memcpy((char*)GVTOP(Args[0]), (char*)GVTOP(Args[1]), count)); 00549 } 00550 00551 //===----------------------------------------------------------------------===// 00552 // IO Functions... 00553 //===----------------------------------------------------------------------===// 00554 00555 // getFILE - Turn a pointer in the host address space into a legit pointer in 00556 // the interpreter address space. This is an identity transformation. 00557 #define getFILE(ptr) ((FILE*)ptr) 00558 00559 // FILE *fopen(const char *filename, const char *mode); 00560 GenericValue lle_X_fopen(FunctionType *M, const vector<GenericValue> &Args) { 00561 assert(Args.size() == 2); 00562 return PTOGV(fopen((const char *)GVTOP(Args[0]), 00563 (const char *)GVTOP(Args[1]))); 00564 } 00565 00566 // int fclose(FILE *F); 00567 GenericValue lle_X_fclose(FunctionType *M, const vector<GenericValue> &Args) { 00568 assert(Args.size() == 1); 00569 GenericValue GV; 00570 GV.IntVal = fclose(getFILE(GVTOP(Args[0]))); 00571 return GV; 00572 } 00573 00574 // int feof(FILE *stream); 00575 GenericValue lle_X_feof(FunctionType *M, const vector<GenericValue> &Args) { 00576 assert(Args.size() == 1); 00577 GenericValue GV; 00578 00579 GV.IntVal = feof(getFILE(GVTOP(Args[0]))); 00580 return GV; 00581 } 00582 00583 // size_t fread(void *ptr, size_t size, size_t nitems, FILE *stream); 00584 GenericValue lle_X_fread(FunctionType *M, const vector<GenericValue> &Args) { 00585 assert(Args.size() == 4); 00586 size_t result; 00587 00588 result = fread((void*)GVTOP(Args[0]), GV_to_size_t (Args[1]), 00589 GV_to_size_t (Args[2]), getFILE(GVTOP(Args[3]))); 00590 return size_t_to_GV (result); 00591 } 00592 00593 // size_t fwrite(const void *ptr, size_t size, size_t nitems, FILE *stream); 00594 GenericValue lle_X_fwrite(FunctionType *M, const vector<GenericValue> &Args) { 00595 assert(Args.size() == 4); 00596 size_t result; 00597 00598 result = fwrite((void*)GVTOP(Args[0]), GV_to_size_t (Args[1]), 00599 GV_to_size_t (Args[2]), getFILE(GVTOP(Args[3]))); 00600 return size_t_to_GV (result); 00601 } 00602 00603 // char *fgets(char *s, int n, FILE *stream); 00604 GenericValue lle_X_fgets(FunctionType *M, const vector<GenericValue> &Args) { 00605 assert(Args.size() == 3); 00606 return GVTOP(fgets((char*)GVTOP(Args[0]), Args[1].IntVal, 00607 getFILE(GVTOP(Args[2])))); 00608 } 00609 00610 // FILE *freopen(const char *path, const char *mode, FILE *stream); 00611 GenericValue lle_X_freopen(FunctionType *M, const vector<GenericValue> &Args) { 00612 assert(Args.size() == 3); 00613 return PTOGV(freopen((char*)GVTOP(Args[0]), (char*)GVTOP(Args[1]), 00614 getFILE(GVTOP(Args[2])))); 00615 } 00616 00617 // int fflush(FILE *stream); 00618 GenericValue lle_X_fflush(FunctionType *M, const vector<GenericValue> &Args) { 00619 assert(Args.size() == 1); 00620 GenericValue GV; 00621 GV.IntVal = fflush(getFILE(GVTOP(Args[0]))); 00622 return GV; 00623 } 00624 00625 // int getc(FILE *stream); 00626 GenericValue lle_X_getc(FunctionType *M, const vector<GenericValue> &Args) { 00627 assert(Args.size() == 1); 00628 GenericValue GV; 00629 GV.IntVal = getc(getFILE(GVTOP(Args[0]))); 00630 return GV; 00631 } 00632 00633 // int _IO_getc(FILE *stream); 00634 GenericValue lle_X__IO_getc(FunctionType *F, const vector<GenericValue> &Args) { 00635 return lle_X_getc(F, Args); 00636 } 00637 00638 // int fputc(int C, FILE *stream); 00639 GenericValue lle_X_fputc(FunctionType *M, const vector<GenericValue> &Args) { 00640 assert(Args.size() == 2); 00641 GenericValue GV; 00642 GV.IntVal = fputc(Args[0].IntVal, getFILE(GVTOP(Args[1]))); 00643 return GV; 00644 } 00645 00646 // int ungetc(int C, FILE *stream); 00647 GenericValue lle_X_ungetc(FunctionType *M, const vector<GenericValue> &Args) { 00648 assert(Args.size() == 2); 00649 GenericValue GV; 00650 GV.IntVal = ungetc(Args[0].IntVal, getFILE(GVTOP(Args[1]))); 00651 return GV; 00652 } 00653 00654 // int ferror (FILE *stream); 00655 GenericValue lle_X_ferror(FunctionType *M, const vector<GenericValue> &Args) { 00656 assert(Args.size() == 1); 00657 GenericValue GV; 00658 GV.IntVal = ferror (getFILE(GVTOP(Args[0]))); 00659 return GV; 00660 } 00661 00662 // int fprintf(FILE *,sbyte *, ...) - a very rough implementation to make output 00663 // useful. 00664 GenericValue lle_X_fprintf(FunctionType *M, const vector<GenericValue> &Args) { 00665 assert(Args.size() >= 2); 00666 char Buffer[10000]; 00667 vector<GenericValue> NewArgs; 00668 NewArgs.push_back(PTOGV(Buffer)); 00669 NewArgs.insert(NewArgs.end(), Args.begin()+1, Args.end()); 00670 GenericValue GV = lle_X_sprintf(M, NewArgs); 00671 00672 fputs(Buffer, getFILE(GVTOP(Args[0]))); 00673 return GV; 00674 } 00675 00676 } // End extern "C" 00677 00678 00679 void Interpreter::initializeExternalFunctions() { 00680 FuncNames["lle_Vb_putchar"] = lle_Vb_putchar; 00681 FuncNames["lle_ii_putchar"] = lle_ii_putchar; 00682 FuncNames["lle_VB_putchar"] = lle_VB_putchar; 00683 FuncNames["lle_X_exit"] = lle_X_exit; 00684 FuncNames["lle_X_abort"] = lle_X_abort; 00685 FuncNames["lle_X_malloc"] = lle_X_malloc; 00686 FuncNames["lle_X_calloc"] = lle_X_calloc; 00687 FuncNames["lle_X_free"] = lle_X_free; 00688 FuncNames["lle_X_atoi"] = lle_X_atoi; 00689 FuncNames["lle_X_pow"] = lle_X_pow; 00690 FuncNames["lle_X_exp"] = lle_X_exp; 00691 FuncNames["lle_X_log"] = lle_X_log; 00692 FuncNames["lle_X_floor"] = lle_X_floor; 00693 FuncNames["lle_X_srand"] = lle_X_srand; 00694 FuncNames["lle_X_rand"] = lle_X_rand; 00695 #ifdef HAVE_RAND48 00696 FuncNames["lle_X_drand48"] = lle_X_drand48; 00697 FuncNames["lle_X_srand48"] = lle_X_srand48; 00698 FuncNames["lle_X_lrand48"] = lle_X_lrand48; 00699 #endif 00700 FuncNames["lle_X_sqrt"] = lle_X_sqrt; 00701 FuncNames["lle_X_puts"] = lle_X_puts; 00702 FuncNames["lle_X_printf"] = lle_X_printf; 00703 FuncNames["lle_X_sprintf"] = lle_X_sprintf; 00704 FuncNames["lle_X_sscanf"] = lle_X_sscanf; 00705 FuncNames["lle_X_scanf"] = lle_X_scanf; 00706 FuncNames["lle_i_clock"] = lle_i_clock; 00707 00708 FuncNames["lle_X_strcmp"] = lle_X_strcmp; 00709 FuncNames["lle_X_strcat"] = lle_X_strcat; 00710 FuncNames["lle_X_strcpy"] = lle_X_strcpy; 00711 FuncNames["lle_X_strlen"] = lle_X_strlen; 00712 FuncNames["lle_X___strdup"] = lle_X___strdup; 00713 FuncNames["lle_X_memset"] = lle_X_memset; 00714 FuncNames["lle_X_memcpy"] = lle_X_memcpy; 00715 00716 FuncNames["lle_X_fopen"] = lle_X_fopen; 00717 FuncNames["lle_X_fclose"] = lle_X_fclose; 00718 FuncNames["lle_X_feof"] = lle_X_feof; 00719 FuncNames["lle_X_fread"] = lle_X_fread; 00720 FuncNames["lle_X_fwrite"] = lle_X_fwrite; 00721 FuncNames["lle_X_fgets"] = lle_X_fgets; 00722 FuncNames["lle_X_fflush"] = lle_X_fflush; 00723 FuncNames["lle_X_fgetc"] = lle_X_getc; 00724 FuncNames["lle_X_getc"] = lle_X_getc; 00725 FuncNames["lle_X__IO_getc"] = lle_X__IO_getc; 00726 FuncNames["lle_X_fputc"] = lle_X_fputc; 00727 FuncNames["lle_X_ungetc"] = lle_X_ungetc; 00728 FuncNames["lle_X_fprintf"] = lle_X_fprintf; 00729 FuncNames["lle_X_freopen"] = lle_X_freopen; 00730 } 00731