X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FSupport%2FMemoryBuffer.h;h=1f02907d9f9aec8348199fe0eec53373565fdbba;hb=525398e1376b0d61fe80a83ed2261e2e6e6ab4a3;hp=e33483cb181aca0dc811f972594730eeca00b971;hpb=333ad3f2bf2941618f8e1563da022da011e615c0;p=oota-llvm.git

diff --git a/include/llvm/Support/MemoryBuffer.h b/include/llvm/Support/MemoryBuffer.h
index e33483cb181..1f02907d9f9 100644
--- a/include/llvm/Support/MemoryBuffer.h
+++ b/include/llvm/Support/MemoryBuffer.h
@@ -15,11 +15,13 @@
 #define LLVM_SUPPORT_MEMORYBUFFER_H
 
 #include "llvm/ADT/StringRef.h"
+#include "llvm/Support/Compiler.h"
 #include "llvm/Support/DataTypes.h"
 
 namespace llvm {
 
 class error_code;
+template<class T> class OwningPtr;
 
 /// MemoryBuffer - This interface provides simple read-only access to a block
 /// of memory, and provides simple methods for reading files and standard input
@@ -35,11 +37,12 @@ class MemoryBuffer {
   const char *BufferStart; // Start of the buffer.
   const char *BufferEnd;   // End of the buffer.
 
-  MemoryBuffer(const MemoryBuffer &); // DO NOT IMPLEMENT
-  MemoryBuffer &operator=(const MemoryBuffer &); // DO NOT IMPLEMENT
+  MemoryBuffer(const MemoryBuffer &) LLVM_DELETED_FUNCTION;
+  MemoryBuffer &operator=(const MemoryBuffer &) LLVM_DELETED_FUNCTION;
 protected:
   MemoryBuffer() {}
-  void init(const char *BufStart, const char *BufEnd);
+  void init(const char *BufStart, const char *BufEnd,
+            bool RequiresNullTerminator);
 public:
   virtual ~MemoryBuffer();
 
@@ -61,22 +64,28 @@ public:
   /// MemoryBuffer if successful, otherwise returning null.  If FileSize is
   /// specified, this means that the client knows that the file exists and that
   /// it has the specified size.
-  static MemoryBuffer *getFile(StringRef Filename, error_code &ec,
-                               int64_t FileSize = -1);
-  static MemoryBuffer *getFile(const char *Filename, error_code &ec,
-                               int64_t FileSize = -1);
+  static error_code getFile(StringRef Filename, OwningPtr<MemoryBuffer> &result,
+                            int64_t FileSize = -1,
+                            bool RequiresNullTerminator = true);
+  static error_code getFile(const char *Filename,
+                            OwningPtr<MemoryBuffer> &result,
+                            int64_t FileSize = -1,
+                            bool RequiresNullTerminator = true);
 
   /// getOpenFile - Given an already-open file descriptor, read the file and
-  /// return a MemoryBuffer.  This takes ownership of the descriptor,
-  /// immediately closing it after reading the file.
-  static MemoryBuffer *getOpenFile(int FD, const char *Filename,
-                                   error_code &ec,
-                                   int64_t FileSize = -1);
+  /// return a MemoryBuffer.
+  static error_code getOpenFile(int FD, const char *Filename,
+                                OwningPtr<MemoryBuffer> &result,
+                                uint64_t FileSize = -1,
+                                uint64_t MapSize = -1,
+                                int64_t Offset = 0,
+                                bool RequiresNullTerminator = true);
 
   /// getMemBuffer - Open the specified memory range as a MemoryBuffer.  Note
-  /// that InputData must be null terminated.
+  /// that InputData must be null terminated if RequiresNullTerminator is true.
   static MemoryBuffer *getMemBuffer(StringRef InputData,
-                                    StringRef BufferName = "");
+                                    StringRef BufferName = "",
+                                    bool RequiresNullTerminator = true);
 
   /// getMemBufferCopy - Open the specified memory range as a MemoryBuffer,
   /// copying the contents and taking ownership of it.  InputData does not
@@ -99,18 +108,33 @@ public:
 
   /// getSTDIN - Read all of stdin into a file buffer, and return it.
   /// If an error occurs, this returns null and sets ec.
-  static MemoryBuffer *getSTDIN(error_code &ec);
+  static error_code getSTDIN(OwningPtr<MemoryBuffer> &result);
 
 
   /// getFileOrSTDIN - Open the specified file as a MemoryBuffer, or open stdin
   /// if the Filename is "-".  If an error occurs, this returns null and sets
   /// ec.
-  static MemoryBuffer *getFileOrSTDIN(StringRef Filename,
-                                      error_code &ec,
-                                      int64_t FileSize = -1);
-  static MemoryBuffer *getFileOrSTDIN(const char *Filename,
-                                      error_code &ec,
-                                      int64_t FileSize = -1);
+  static error_code getFileOrSTDIN(StringRef Filename,
+                                   OwningPtr<MemoryBuffer> &result,
+                                   int64_t FileSize = -1);
+  static error_code getFileOrSTDIN(const char *Filename,
+                                   OwningPtr<MemoryBuffer> &result,
+                                   int64_t FileSize = -1);
+  
+  
+  //===--------------------------------------------------------------------===//
+  // Provided for performance analysis.
+  //===--------------------------------------------------------------------===//
+
+  /// The kind of memory backing used to support the MemoryBuffer.
+  enum BufferKind {
+    MemoryBuffer_Malloc,
+    MemoryBuffer_MMap
+  };
+
+  /// Return information on the memory mechanism used to support the
+  /// MemoryBuffer.
+  virtual BufferKind getBufferKind() const = 0;  
 };
 
 } // end namespace llvm