[C++11] More 'nullptr' conversion or in some cases just using a boolean check instead...

[oota-llvm.git] / include / llvm / Bitcode / ReaderWriter.h

diff --git a/include/llvm/Bitcode/ReaderWriter.h b/include/llvm/Bitcode/ReaderWriter.h
index ce975cdb8bfe0fe2d10359e9e26a30512446fac4..4c194a638d4a6760e6a6b5a7746a54c8655f16bc 100644 (file)
--- a/include/llvm/Bitcode/ReaderWriter.h
+++ b/include/llvm/Bitcode/ReaderWriter.h
@@ -11,9 +11,10 @@
 //
 //===----------------------------------------------------------------------===//
 
-#ifndef LLVM_BITCODE_H
-#define LLVM_BITCODE_H
+#ifndef LLVM_BITCODE_READERWRITER_H
+#define LLVM_BITCODE_READERWRITER_H
 
+#include "llvm/Support/ErrorOr.h"
 #include <string>
 
 namespace llvm {
@@ -25,14 +26,11 @@ namespace llvm {
   class ModulePass;
   class raw_ostream;
 
-  /// getLazyBitcodeModule - Read the header of the specified bitcode buffer
-  /// and prepare for lazy deserialization of function bodies.  If successful,
-  /// this takes ownership of 'buffer' and returns a non-null pointer.  On
-  /// error, this returns null, *does not* take ownership of Buffer, and fills
-  /// in *ErrMsg with an error description if ErrMsg is non-null.
-  Module *getLazyBitcodeModule(MemoryBuffer *Buffer,
-                               LLVMContext &Context,
-                               std::string *ErrMsg = 0);
+  /// Read the header of the specified bitcode buffer and prepare for lazy
+  /// deserialization of function bodies.  If successful, this takes ownership
+  /// of 'buffer. On error, this *does not* take ownership of Buffer.
+  ErrorOr<Module *> getLazyBitcodeModule(MemoryBuffer *Buffer,
+                                         LLVMContext &Context);
 
   /// getStreamedBitcodeModule - Read the header of the specified stream
   /// and prepare for lazy deserialization and streaming of function bodies.
@@ -41,7 +39,7 @@ namespace llvm {
   Module *getStreamedBitcodeModule(const std::string &name,
                                    DataStreamer *streamer,
                                    LLVMContext &Context,
-                                   std::string *ErrMsg = 0);
+                                   std::string *ErrMsg = nullptr);
 
   /// getBitcodeTargetTriple - Read the header of the specified bitcode
   /// buffer and extract just the triple information. If successful,
@@ -50,33 +48,24 @@ namespace llvm {
   /// if ErrMsg is non-null.
   std::string getBitcodeTargetTriple(MemoryBuffer *Buffer,
                                      LLVMContext &Context,
-                                     std::string *ErrMsg = 0);
+                                     std::string *ErrMsg = nullptr);
 
-  /// ParseBitcodeFile - Read the specified bitcode file, returning the module.
-  /// If an error occurs, this returns null and fills in *ErrMsg if it is
-  /// non-null.  This method *never* takes ownership of Buffer.
-  Module *ParseBitcodeFile(MemoryBuffer *Buffer, LLVMContext &Context,
-                           std::string *ErrMsg = 0);
+  /// Read the specified bitcode file, returning the module.
+  /// This method *never* takes ownership of Buffer.
+  ErrorOr<Module *> parseBitcodeFile(MemoryBuffer *Buffer,
+                                     LLVMContext &Context);
 
   /// WriteBitcodeToFile - Write the specified module to the specified
   /// raw output stream.  For streams where it matters, the given stream
   /// should be in "binary" mode.
   void WriteBitcodeToFile(const Module *M, raw_ostream &Out);
 
-  /// WriteBitcodeToStream - Write the specified module to the specified
-  /// raw output stream.
-  void WriteBitcodeToStream(const Module *M, BitstreamWriter &Stream);
-
-  /// createBitcodeWriterPass - Create and return a pass that writes the module
-  /// to the specified ostream.
-  ModulePass *createBitcodeWriterPass(raw_ostream &Str);
-
 
   /// isBitcodeWrapper - Return true if the given bytes are the magic bytes
   /// for an LLVM IR bitcode wrapper.
   ///
-  static inline bool isBitcodeWrapper(const unsigned char *BufPtr,
-                                      const unsigned char *BufEnd) {
+  inline bool isBitcodeWrapper(const unsigned char *BufPtr,
+                               const unsigned char *BufEnd) {
     // See if you can find the hidden message in the magic bytes :-).
     // (Hint: it's a little-endian encoding.)
     return BufPtr != BufEnd &&
@@ -89,8 +78,8 @@ namespace llvm {
   /// isRawBitcode - Return true if the given bytes are the magic bytes for
   /// raw LLVM IR bitcode (without a wrapper).
   ///
-  static inline bool isRawBitcode(const unsigned char *BufPtr,
-                                  const unsigned char *BufEnd) {
+  inline bool isRawBitcode(const unsigned char *BufPtr,
+                           const unsigned char *BufEnd) {
     // These bytes sort of have a hidden message, but it's not in
     // little-endian this time, and it's a little redundant.
     return BufPtr != BufEnd &&
@@ -103,8 +92,8 @@ namespace llvm {
   /// isBitcode - Return true if the given bytes are the magic bytes for
   /// LLVM IR bitcode, either with or without a wrapper.
   ///
-  static bool inline isBitcode(const unsigned char *BufPtr,
-                               const unsigned char *BufEnd) {
+  inline bool isBitcode(const unsigned char *BufPtr,
+                        const unsigned char *BufEnd) {
     return isBitcodeWrapper(BufPtr, BufEnd) ||
            isRawBitcode(BufPtr, BufEnd);
   }
@@ -125,9 +114,9 @@ namespace llvm {
   /// BC file.
   /// If 'VerifyBufferSize' is true, check that the buffer is large enough to
   /// contain the whole bitcode file.
-  static inline bool SkipBitcodeWrapperHeader(const unsigned char *&BufPtr,
-                                              const unsigned char *&BufEnd,
-                                              bool VerifyBufferSize) {
+  inline bool SkipBitcodeWrapperHeader(const unsigned char *&BufPtr,
+                                       const unsigned char *&BufEnd,
+                                       bool VerifyBufferSize) {
     enum {
       KnownHeaderSize = 4*4,  // Size of header we read.
       OffsetField = 2*4,      // Offset in bytes to Offset field.