1 //===-- BitReader.cpp -----------------------------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 #include "llvm-c/BitReader.h" 11 #include "llvm/Bitcode/ReaderWriter.h" 12 #include "llvm/IR/LLVMContext.h" 13 #include "llvm/IR/Module.h" 14 #include "llvm/Support/MemoryBuffer.h" 15 #include <cstring> 16 #include <string> 17 18 using namespace llvm; 19 20 /* Builds a module from the bitcode in the specified memory buffer, returning a 21 reference to the module via the OutModule parameter. Returns 0 on success. 22 Optionally returns a human-readable error message via OutMessage. */ 23 LLVMBool LLVMParseBitcode(LLVMMemoryBufferRef MemBuf, 24 LLVMModuleRef *OutModule, char **OutMessage) { 25 return LLVMParseBitcodeInContext(wrap(&getGlobalContext()), MemBuf, OutModule, 26 OutMessage); 27 } 28 29 LLVMBool LLVMParseBitcodeInContext(LLVMContextRef ContextRef, 30 LLVMMemoryBufferRef MemBuf, 31 LLVMModuleRef *OutModule, 32 char **OutMessage) { 33 ErrorOr<Module *> ModuleOrErr = 34 parseBitcodeFile(unwrap(MemBuf), *unwrap(ContextRef)); 35 if (std::error_code EC = ModuleOrErr.getError()) { 36 if (OutMessage) 37 *OutMessage = strdup(EC.message().c_str()); 38 *OutModule = wrap((Module*)nullptr); 39 return 1; 40 } 41 42 *OutModule = wrap(ModuleOrErr.get()); 43 return 0; 44 } 45 46 /* Reads a module from the specified path, returning via the OutModule parameter 47 a module provider which performs lazy deserialization. Returns 0 on success. 48 Optionally returns a human-readable error message via OutMessage. */ 49 LLVMBool LLVMGetBitcodeModuleInContext(LLVMContextRef ContextRef, 50 LLVMMemoryBufferRef MemBuf, 51 LLVMModuleRef *OutM, 52 char **OutMessage) { 53 std::string Message; 54 ErrorOr<Module *> ModuleOrErr = 55 getLazyBitcodeModule(unwrap(MemBuf), *unwrap(ContextRef)); 56 57 if (std::error_code EC = ModuleOrErr.getError()) { 58 *OutM = wrap((Module *)nullptr); 59 if (OutMessage) 60 *OutMessage = strdup(EC.message().c_str()); 61 return 1; 62 } 63 64 *OutM = wrap(ModuleOrErr.get()); 65 66 return 0; 67 68 } 69 70 LLVMBool LLVMGetBitcodeModule(LLVMMemoryBufferRef MemBuf, LLVMModuleRef *OutM, 71 char **OutMessage) { 72 return LLVMGetBitcodeModuleInContext(LLVMGetGlobalContext(), MemBuf, OutM, 73 OutMessage); 74 } 75 76 /* Deprecated: Use LLVMGetBitcodeModuleInContext instead. */ 77 LLVMBool LLVMGetBitcodeModuleProviderInContext(LLVMContextRef ContextRef, 78 LLVMMemoryBufferRef MemBuf, 79 LLVMModuleProviderRef *OutMP, 80 char **OutMessage) { 81 return LLVMGetBitcodeModuleInContext(ContextRef, MemBuf, 82 reinterpret_cast<LLVMModuleRef*>(OutMP), 83 OutMessage); 84 } 85 86 /* Deprecated: Use LLVMGetBitcodeModule instead. */ 87 LLVMBool LLVMGetBitcodeModuleProvider(LLVMMemoryBufferRef MemBuf, 88 LLVMModuleProviderRef *OutMP, 89 char **OutMessage) { 90 return LLVMGetBitcodeModuleProviderInContext(LLVMGetGlobalContext(), MemBuf, 91 OutMP, OutMessage); 92 } 93
