[NaCl SDK] Refactor FakeHtml5FsFilesystem and FakeHtml5FsNode.

native_client_sdk/src/tests/nacl_io_test/fake_ppapi/fake_node.cc

Index: native_client_sdk/src/tests/nacl_io_test/fake_ppapi/fake_node.cc
diff --git a/native_client_sdk/src/tests/nacl_io_test/fake_ppapi/fake_node.cc b/native_client_sdk/src/tests/nacl_io_test/fake_ppapi/fake_node.cc
new file mode 100644
index 0000000000000000000000000000000000000000..744fb0b2d282574ac9c850db72d5b088ca9a028c
--- /dev/null
+++ b/native_client_sdk/src/tests/nacl_io_test/fake_ppapi/fake_node.cc
@@ -0,0 +1,69 @@
+// Copyright 2016 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 "fake_ppapi/fake_node.h"
+
+#include <string.h>
+
+#include <algorithm>
+
+#include <ppapi/c/pp_errors.h>
+
+FakeNode::FakeNode(const PP_FileInfo& info) : info_(info) {}
+
+FakeNode::FakeNode(const PP_FileInfo& info,
+                   const std::vector<uint8_t>& contents)
+    : info_(info), contents_(contents) {}
+
+FakeNode::FakeNode(const PP_FileInfo& info, const std::string& contents)
+    : info_(info) {
+  std::copy(contents.begin(), contents.end(), std::back_inserter(contents_));
+}
+
+int32_t FakeNode::Read(int64_t offset, char* buffer, int32_t bytes_to_read) {
+  if (offset < 0)
+    return PP_ERROR_FAILED;
+
+  bytes_to_read =
+      std::max(0, std::min<int32_t>(bytes_to_read, contents_.size() - offset));
+  memcpy(buffer, contents_.data() + offset, bytes_to_read);
+  return bytes_to_read;
+}
+
+int32_t FakeNode::Write(int64_t offset,
+                        const char* buffer,
+                        int32_t bytes_to_write) {
+  if (offset < 0)
+    return PP_ERROR_FAILED;
+
+  size_t new_size = offset + bytes_to_write;
+  if (new_size > contents_.size())
+    contents_.resize(new_size);
+
+  memcpy(contents_.data() + offset, buffer, bytes_to_write);
+  info_.size = new_size;
+  return bytes_to_write;
+}
+
+int32_t FakeNode::Append(const char* buffer, int32_t bytes_to_write) {
+  return Write(contents_.size(), buffer, bytes_to_write);
+}
+
+int32_t FakeNode::SetLength(int64_t length) {
+  contents_.resize(length);
+  info_.size = length;
+  return PP_OK;
+}
+
+void FakeNode::GetInfo(PP_FileInfo* out_info) {
+  *out_info = info_;
+}
+
+bool FakeNode::IsRegular() const {
+  return info_.type == PP_FILETYPE_REGULAR;
+}
+
+bool FakeNode::IsDirectory() const {
+  return info_.type == PP_FILETYPE_DIRECTORY;
+}