Disk cache: Reference CL for the implementation of file format version 3.

net/disk_cache/mapped_file_win.cc

Index: net/disk_cache/mapped_file_win.cc
===================================================================
--- net/disk_cache/mapped_file_win.cc	(revision 199883)
+++ net/disk_cache/mapped_file_win.cc	(working copy)
@@ -28,14 +28,26 @@
   view_size_ = size;
 
   // Make sure we detect hardware failures reading the headers.
-  size_t temp_len = size ? size : 4096;
+  /*size_t temp_len = size ? size : 4096;
   scoped_ptr<char[]> temp(new char[temp_len]);
   if (!Read(temp.get(), temp_len, 0))
-    return NULL;
+    return NULL;*/
 
   return buffer_;
 }
 
+bool MappedFile::InitNoMap(const base::FilePath& name) {
+  DCHECK(!init_);
+  if (init_ || !File::Init(name))
+    return false;
+
+  buffer_ = NULL;
+  section_ = NULL;
+  view_size_ = 0;
+  init_ = true;
+  return true;
+}
+
 MappedFile::~MappedFile() {
   if (!init_)
     return;
@@ -59,6 +71,20 @@
   return Write(block->buffer(), block->size(), offset);
 }
 
+bool MappedFile::Load(const FileBlock* block,
+                      FileIOCallback* callback,
+                      bool* completed) {
+  size_t offset = block->offset() + view_size_;
+  return Read(block->buffer(), block->size(), offset, callback, completed);
+}
+
+bool MappedFile::Store(const FileBlock* block,
+                       FileIOCallback* callback,
+                       bool* completed) {
+  size_t offset = block->offset() + view_size_;
+  return Write(block->buffer(), block->size(), offset, callback, completed);
+}
+
 void MappedFile::Flush() {
 }