1 files changed, 92 insertions, 0 deletions
diff --git a/net/disk_cache/blockfile/addr.cc b/net/disk_cache/blockfile/addr.cc
new file mode 100644
index 0000000..ab418c4
--- /dev/null
+++ b/net/disk_cache/blockfile/addr.cc
@@ -0,0 +1,92 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "net/disk_cache/blockfile/addr.h"
+
+#include "base/logging.h"
+
+namespace disk_cache {
+
+int Addr::start_block() const {
+  DCHECK(is_block_file());
+  return value_ & kStartBlockMask;
+}
+
+int Addr::num_blocks() const {
+  DCHECK(is_block_file() || !value_);
+  return ((value_ & kNumBlocksMask) >> kNumBlocksOffset) + 1;
+}
+
+bool Addr::SetFileNumber(int file_number) {
+  DCHECK(is_separate_file());
+  if (file_number & ~kFileNameMask)
+    return false;
+  value_ = kInitializedMask | file_number;
+  return true;
+}
+
+bool Addr::SanityCheckV2() const {
+  if (!is_initialized())
+    return !value_;
+
+  if (file_type() > BLOCK_4K)
+    return false;
+
+  if (is_separate_file())
+    return true;
+
+  return !reserved_bits();
+}
+
+bool Addr::SanityCheckV3() const {
+  if (!is_initialized())
+    return !value_;
+
+  // For actual entries, SanityCheckForEntryV3 should be used.
+  if (file_type() > BLOCK_FILES)
+    return false;
+
+  if (is_separate_file())
+    return true;
+
+  return !reserved_bits();
+}
+
+bool Addr::SanityCheckForEntryV2() const {
+  if (!SanityCheckV2() || !is_initialized())
+    return false;
+
+  if (is_separate_file() || file_type() != BLOCK_256)
+    return false;
+
+  return true;
+}
+
+bool Addr::SanityCheckForEntryV3() const {
+  if (!is_initialized())
+    return false;
+
+  if (reserved_bits())
+    return false;
+
+  if (file_type() != BLOCK_ENTRIES && file_type() != BLOCK_EVICTED)
+    return false;
+
+  if (num_blocks() != 1)
+    return false;
+
+  return true;
+}
+
+bool Addr::SanityCheckForRankings() const {
+  if (!SanityCheckV2() || !is_initialized())
+    return false;
+
+  if (is_separate_file() || file_type() != RANKINGS || num_blocks() != 1)
+    return false;
+
+  return true;
+}
+
+}  // namespace disk_cache