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