Add support for MemoryBuffers that are not null terminated and add

support for creating buffers that cover only a part of a file.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127409 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 9 insertions, 4 deletions

diff --git a/include/llvm/Support/MemoryBuffer.h b/include/llvm/Support/MemoryBuffer.h
index b6243b7b10..a52dc11cff 100644
--- a/include/llvm/Support/MemoryBuffer.h
+++ b/include/llvm/Support/MemoryBuffer.h
@@ -40,7 +40,8 @@ class MemoryBuffer {
   MemoryBuffer &operator=(const MemoryBuffer &); // DO NOT IMPLEMENT
 protected:
   MemoryBuffer() {}
-  void init(const char *BufStart, const char *BufEnd);
+  void init(const char *BufStart, const char *BufEnd,
+            bool RequiresNullTerminator);
 public:
   virtual ~MemoryBuffer();
 
@@ -72,7 +73,10 @@ public:
   /// return a MemoryBuffer.
   static error_code getOpenFile(int FD, const char *Filename,
                                 OwningPtr<MemoryBuffer> &result,
-                                int64_t FileSize = -1);
+                                size_t FileSize = -1,
+                                size_t MapSize = -1,
+                                off_t Offset = 0,
+                                bool RequiresNullTerminator = true);
 
   /// getMemBuffer - Open the specified memory range as a MemoryBuffer.  Note
   /// that InputData must be null terminated.
diff --git a/include/llvm/Support/PathV1.h b/include/llvm/Support/PathV1.h
index d7753a3e71..024bb39ced 100644
--- a/include/llvm/Support/PathV1.h
+++ b/include/llvm/Support/PathV1.h
@@ -608,14 +608,15 @@ namespace sys {
       ///
       /// This API is not intended for general use, clients should use
       /// MemoryBuffer::getFile instead.
-      static const char *MapInFilePages(int FD, uint64_t FileSize);
+      static const char *MapInFilePages(int FD, size_t FileSize,
+                                        off_t Offset);
 
       /// UnMapFilePages - Free pages mapped into the current process by
       /// MapInFilePages.
       ///
       /// This API is not intended for general use, clients should use
       /// MemoryBuffer::getFile instead.
-      static void UnMapFilePages(const char *Base, uint64_t FileSize);
+      static void UnMapFilePages(const char *Base, size_t FileSize);
 
     /// @}
     /// @name Data