[llvm-profdata] Add SaturatingAdd/SaturatingMultiply Helper Functions

[oota-llvm.git] / include / llvm / Support / MemoryBuffer.h

diff --git a/include/llvm/Support/MemoryBuffer.h b/include/llvm/Support/MemoryBuffer.h
index a8dc9d7613e8c49a8141e3bbc4c1d445e9d5dfde..d6ff69d50f591482e7a6eceda60910db51a2c909 100644 (file)
--- a/include/llvm/Support/MemoryBuffer.h
+++ b/include/llvm/Support/MemoryBuffer.h
@@ -17,11 +17,9 @@
 #include "llvm-c/Support.h"
 #include "llvm/ADT/Twine.h"
 #include "llvm/Support/CBindingWrapping.h"
-#include "llvm/Support/Compiler.h"
 #include "llvm/Support/DataTypes.h"
 #include "llvm/Support/ErrorOr.h"
 #include <memory>
-#include <system_error>
 
 namespace llvm {
 class MemoryBufferRef;
@@ -40,8 +38,8 @@ class MemoryBuffer {
   const char *BufferStart; // Start of the buffer.
   const char *BufferEnd;   // End of the buffer.
 
-  MemoryBuffer(const MemoryBuffer &) LLVM_DELETED_FUNCTION;
-  MemoryBuffer &operator=(const MemoryBuffer &) LLVM_DELETED_FUNCTION;
+  MemoryBuffer(const MemoryBuffer &) = delete;
+  MemoryBuffer &operator=(const MemoryBuffer &) = delete;
 protected:
   MemoryBuffer() {}
   void init(const char *BufStart, const char *BufEnd,
@@ -78,13 +76,9 @@ public:
   /// Given an already-open file descriptor, map some slice of it into a
   /// MemoryBuffer. The slice is specified by an \p Offset and \p MapSize.
   /// Since this is in the middle of a file, the buffer is not null terminated.
-  ///
-  /// \param IsVolatileSize Set to true to indicate that the file size may be
-  /// changing, e.g. when libclang tries to parse while the user is
-  /// editing/updating the file.
   static ErrorOr<std::unique_ptr<MemoryBuffer>>
   getOpenFileSlice(int FD, const Twine &Filename, uint64_t MapSize,
-                   int64_t Offset, bool IsVolatileSize = false);
+                   int64_t Offset);
 
   /// Given an already-open file descriptor, read the file and return a
   /// MemoryBuffer.
@@ -128,7 +122,12 @@ public:
   /// Open the specified file as a MemoryBuffer, or open stdin if the Filename
   /// is "-".
   static ErrorOr<std::unique_ptr<MemoryBuffer>>
-  getFileOrSTDIN(const Twine &Filename, int64_t FileSize = -1);
+  getFileOrSTDIN(const Twine &Filename, int64_t FileSize = -1,
+                 bool RequiresNullTerminator = true);
+
+  /// Map a subrange of the specified file as a MemoryBuffer.
+  static ErrorOr<std::unique_ptr<MemoryBuffer>>
+  getFileSlice(const Twine &Filename, uint64_t MapSize, uint64_t Offset);
 
   //===--------------------------------------------------------------------===//
   // Provided for performance analysis.
@@ -153,6 +152,8 @@ class MemoryBufferRef {
 
 public:
   MemoryBufferRef() {}
+  MemoryBufferRef(MemoryBuffer& Buffer)
+      : Buffer(Buffer.getBuffer()), Identifier(Buffer.getBufferIdentifier()) {}
   MemoryBufferRef(StringRef Buffer, StringRef Identifier)
       : Buffer(Buffer), Identifier(Identifier) {}