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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/LLVMContext.h"
13 #include "llvm/Support/MemoryBuffer.h"
14 #include <string>
15 #include <cstring>
16 
17 using namespace llvm;
18 
19 /* Builds a module from the bitcode in the specified memory buffer, returning a
20    reference to the module via the OutModule parameter. Returns 0 on success.
21    Optionally returns a human-readable error message via OutMessage. */
LLVMParseBitcode(LLVMMemoryBufferRef MemBuf,LLVMModuleRef * OutModule,char ** OutMessage)22 LLVMBool LLVMParseBitcode(LLVMMemoryBufferRef MemBuf,
23                           LLVMModuleRef *OutModule, char **OutMessage) {
24   return LLVMParseBitcodeInContext(wrap(&getGlobalContext()), MemBuf, OutModule,
25                                    OutMessage);
26 }
27 
LLVMParseBitcodeInContext(LLVMContextRef ContextRef,LLVMMemoryBufferRef MemBuf,LLVMModuleRef * OutModule,char ** OutMessage)28 LLVMBool LLVMParseBitcodeInContext(LLVMContextRef ContextRef,
29                                    LLVMMemoryBufferRef MemBuf,
30                                    LLVMModuleRef *OutModule,
31                                    char **OutMessage) {
32   std::string Message;
33 
34   *OutModule = wrap(ParseBitcodeFile(unwrap(MemBuf), *unwrap(ContextRef),
35                                      &Message));
36   if (!*OutModule) {
37     if (OutMessage)
38       *OutMessage = strdup(Message.c_str());
39     return 1;
40   }
41 
42   return 0;
43 }
44 
45 /* Reads a module from the specified path, returning via the OutModule parameter
46    a module provider which performs lazy deserialization. Returns 0 on success.
47    Optionally returns a human-readable error message via OutMessage. */
LLVMGetBitcodeModuleInContext(LLVMContextRef ContextRef,LLVMMemoryBufferRef MemBuf,LLVMModuleRef * OutM,char ** OutMessage)48 LLVMBool LLVMGetBitcodeModuleInContext(LLVMContextRef ContextRef,
49                                        LLVMMemoryBufferRef MemBuf,
50                                        LLVMModuleRef *OutM,
51                                        char **OutMessage) {
52   std::string Message;
53 
54   *OutM = wrap(getLazyBitcodeModule(unwrap(MemBuf), *unwrap(ContextRef),
55                                     &Message));
56   if (!*OutM) {
57     if (OutMessage)
58       *OutMessage = strdup(Message.c_str());
59     return 1;
60   }
61 
62   return 0;
63 
64 }
65 
LLVMGetBitcodeModule(LLVMMemoryBufferRef MemBuf,LLVMModuleRef * OutM,char ** OutMessage)66 LLVMBool LLVMGetBitcodeModule(LLVMMemoryBufferRef MemBuf, LLVMModuleRef *OutM,
67                               char **OutMessage) {
68   return LLVMGetBitcodeModuleInContext(LLVMGetGlobalContext(), MemBuf, OutM,
69                                        OutMessage);
70 }
71 
72 /* Deprecated: Use LLVMGetBitcodeModuleInContext instead. */
LLVMGetBitcodeModuleProviderInContext(LLVMContextRef ContextRef,LLVMMemoryBufferRef MemBuf,LLVMModuleProviderRef * OutMP,char ** OutMessage)73 LLVMBool LLVMGetBitcodeModuleProviderInContext(LLVMContextRef ContextRef,
74                                                LLVMMemoryBufferRef MemBuf,
75                                                LLVMModuleProviderRef *OutMP,
76                                                char **OutMessage) {
77   return LLVMGetBitcodeModuleInContext(ContextRef, MemBuf,
78                                        reinterpret_cast<LLVMModuleRef*>(OutMP),
79                                        OutMessage);
80 }
81 
82 /* Deprecated: Use LLVMGetBitcodeModule instead. */
LLVMGetBitcodeModuleProvider(LLVMMemoryBufferRef MemBuf,LLVMModuleProviderRef * OutMP,char ** OutMessage)83 LLVMBool LLVMGetBitcodeModuleProvider(LLVMMemoryBufferRef MemBuf,
84                                       LLVMModuleProviderRef *OutMP,
85                                       char **OutMessage) {
86   return LLVMGetBitcodeModuleProviderInContext(LLVMGetGlobalContext(), MemBuf,
87                                                OutMP, OutMessage);
88 }
89