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/Support/MemoryBuffer.h"
13 #include <string>
14 #include <cstring>
15 
16 using namespace llvm;
17 
18 /* Builds a module from the bitcode in the specified memory buffer, returning a
19    reference to the module via the OutModule parameter. Returns 0 on success.
20    Optionally returns a human-readable error message via OutMessage. */
21 int LLVMParseBitcode(LLVMMemoryBufferRef MemBuf,
22                      LLVMModuleRef *OutModule, char **OutMessage) {
23   std::string Message;
24 
25   *OutModule = wrap(ParseBitcodeFile(unwrap(MemBuf), &Message));
26   if (!*OutModule) {
27     if (OutMessage)
28       *OutMessage = strdup(Message.c_str());
29     return 1;
30   }
31 
32   return 0;
33 }
34 
35 /* Reads a module from the specified path, returning via the OutModule parameter
36    a module provider which performs lazy deserialization. Returns 0 on success.
37    Optionally returns a human-readable error message via OutMessage. */
38 int LLVMGetBitcodeModuleProvider(LLVMMemoryBufferRef MemBuf,
39                                  LLVMModuleProviderRef *OutMP,
40                                  char **OutMessage) {
41   std::string Message;
42 
43   *OutMP = wrap(getBitcodeModuleProvider(unwrap(MemBuf), &Message));
44   if (!*OutMP) {
45     if (OutMessage)
46       *OutMessage = strdup(Message.c_str());
47     return 1;
48   }
49 
50   return 0;
51 }
52