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/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. */
  22 LLVMBool LLVMParseBitcode(LLVMMemoryBufferRef MemBuf,
  23                           LLVMModuleRef *OutModule, char **OutMessage) {
  24   return LLVMParseBitcodeInContext(wrap(&getGlobalContext()), MemBuf, OutModule,
  25                                    OutMessage);
  26 }
  27
  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. */
  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
  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. */
  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. */
  83 LLVMBool LLVMGetBitcodeModuleProvider(LLVMMemoryBufferRef MemBuf,
  84                                       LLVMModuleProviderRef *OutMP,
  85                                       char **OutMessage) {
  86   return LLVMGetBitcodeModuleProviderInContext(LLVMGetGlobalContext(), MemBuf,
  87                                                OutMP, OutMessage);
  88 }