lib/Bitcode/Reader/BitReader.cpp

   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 }