Adds a modified copy of talk/base to webrtc/base. It is the first step in migrating talk/base to webrtc/base.

BUG=N/A
R=andrew@webrtc.org, wu@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/12199004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@6107 4adac7df-926f-26a2-2b94-8c16560cd09d

webrtc/base/diskcache_win32.cc

@@ -0,0 +1,86 @@
+/*
+ *  Copyright 2006 The WebRTC Project Authors. All rights reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "webrtc/base/win32.h"
+#include <shellapi.h>
+#include <shlobj.h>
+#include <tchar.h>
+
+#include <time.h>
+
+#include "webrtc/base/common.h"
+#include "webrtc/base/diskcache.h"
+#include "webrtc/base/pathutils.h"
+#include "webrtc/base/stream.h"
+#include "webrtc/base/stringencode.h"
+#include "webrtc/base/stringutils.h"
+
+#include "webrtc/base/diskcache_win32.h"
+
+namespace rtc {
+
+bool DiskCacheWin32::InitializeEntries() {
+  // Note: We could store the cache information in a separate file, for faster
+  // initialization.  Figuring it out empirically works, too.
+
+  std::wstring path16 = ToUtf16(folder_);
+  path16.append(1, '*');
+
+  WIN32_FIND_DATA find_data;
+  HANDLE find_handle = FindFirstFile(path16.c_str(), &find_data);
+  if (find_handle != INVALID_HANDLE_VALUE) {
+    do {
+      size_t index;
+      std::string id;
+      if (!FilenameToId(ToUtf8(find_data.cFileName), &id, &index))
+        continue;
+
+      Entry* entry = GetOrCreateEntry(id, true);
+      entry->size += find_data.nFileSizeLow;
+      total_size_ += find_data.nFileSizeLow;
+      entry->streams = _max(entry->streams, index + 1);
+      FileTimeToUnixTime(find_data.ftLastWriteTime, &entry->last_modified);
+
+    } while (FindNextFile(find_handle, &find_data));
+
+    FindClose(find_handle);
+  }
+
+  return true;
+}
+
+bool DiskCacheWin32::PurgeFiles() {
+  std::wstring path16 = ToUtf16(folder_);
+  path16.append(1, '*');
+  path16.append(1, '\0');
+
+  SHFILEOPSTRUCT file_op = { 0 };
+  file_op.wFunc = FO_DELETE;
+  file_op.pFrom = path16.c_str();
+  file_op.fFlags = FOF_NOCONFIRMATION | FOF_NOERRORUI | FOF_SILENT
+                   | FOF_NORECURSION | FOF_FILESONLY;
+  if (0 != SHFileOperation(&file_op)) {
+    LOG_F(LS_ERROR) << "Couldn't delete cache files";
+    return false;
+  }
+
+  return true;
+}
+
+bool DiskCacheWin32::FileExists(const std::string& filename) const {
+  DWORD result = ::GetFileAttributes(ToUtf16(filename).c_str());
+  return (INVALID_FILE_ATTRIBUTES != result);
+}
+
+bool DiskCacheWin32::DeleteFile(const std::string& filename) const {
+  return ::DeleteFile(ToUtf16(filename).c_str()) != 0;
+}
+
+}