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. */
LLVMParseBitcode(LLVMMemoryBufferRef MemBuf,LLVMModuleRef * OutModule,char ** OutMessage)23 LLVMBool LLVMParseBitcode(LLVMMemoryBufferRef MemBuf,
24 LLVMModuleRef *OutModule, char **OutMessage) {
25 return LLVMParseBitcodeInContext(wrap(&getGlobalContext()), MemBuf, OutModule,
26 OutMessage);
27 }
28
LLVMParseBitcodeInContext(LLVMContextRef ContextRef,LLVMMemoryBufferRef MemBuf,LLVMModuleRef * OutModule,char ** OutMessage)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. */
LLVMGetBitcodeModuleInContext(LLVMContextRef ContextRef,LLVMMemoryBufferRef MemBuf,LLVMModuleRef * OutM,char ** 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
LLVMGetBitcodeModule(LLVMMemoryBufferRef MemBuf,LLVMModuleRef * OutM,char ** OutMessage)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. */
LLVMGetBitcodeModuleProviderInContext(LLVMContextRef ContextRef,LLVMMemoryBufferRef MemBuf,LLVMModuleProviderRef * OutMP,char ** OutMessage)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. */
LLVMGetBitcodeModuleProvider(LLVMMemoryBufferRef MemBuf,LLVMModuleProviderRef * OutMP,char ** OutMessage)87 LLVMBool LLVMGetBitcodeModuleProvider(LLVMMemoryBufferRef MemBuf,
88 LLVMModuleProviderRef *OutMP,
89 char **OutMessage) {
90 return LLVMGetBitcodeModuleProviderInContext(LLVMGetGlobalContext(), MemBuf,
91 OutMP, OutMessage);
92 }
93