Draft: apps APIs in Pepper

ppapi/cpp/dev/string_wrapper_dev.cc

Index: ppapi/cpp/dev/string_wrapper_dev.cc
diff --git a/ppapi/cpp/dev/string_wrapper_dev.cc b/ppapi/cpp/dev/string_wrapper_dev.cc
new file mode 100644
index 0000000000000000000000000000000000000000..e26e259797c23b94e011453aa20e7b484881bf42
--- /dev/null
+++ b/ppapi/cpp/dev/string_wrapper_dev.cc
@@ -0,0 +1,74 @@
+// Copyright (c) 2013 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 "ppapi/cpp/dev/string_wrapper_dev.h"
+
+#include "ppapi/cpp/logging.h"
+#include "ppapi/cpp/var.h"
+
+namespace pp {
+namespace internal {
+
+StringWrapper::StringWrapper(PP_Var* storage, NotOwned)
+    : storage_(storage, NOT_OWNED) {
+  // TODO(yzshen): consider what if the value is not correct.
+  PP_DCHECK(storage_->type == PP_VARTYPE_UNDEFINED);
+}
+
+StringWrapper::StringWrapper(const std::string& value) {
+  *storage_ = Var(value).Detach();
+}
+  
+StringWrapper::StringWrapper(const StringWrapper& other) {
+  // Add one ref.
+  *storage_ = Var(*other.storage_).Detach();
+}
+
+StringWrapper::~StringWrapper() {
+  Var auto_release(PASS_REF, *storage_);
+  *storage_ = PP_MakeUndefined();
+}
+
+StringWrapper& StringWrapper::operator=(const StringWrapper& other) {
+  return operator=(*other.storage_);
+}
+
+StringWrapper& StringWrapper::operator=(const PP_Var& other) {
+  if (storage_.get() == &other)
+    return *this;
+
+  Var auto_release(PASS_REF, *storage_);
+  // Add one ref.
+  *storage_ = Var(other).Detach();
+  return *this;
+}
+
+bool StringWrapper::is_set() const {
+  PP_DCHECK(storage_->type == PP_VARTYPE_STRING ||
+            storage_->type == PP_VARTYPE_UNDEFINED);
+  return storage_->type == PP_VARTYPE_STRING;
+}
+
+void StringWrapper::unset() {
+  Var auto_release(PASS_REF, *storage_);
+  *storage_ = PP_MakeUndefined();
+}
+
+std::string StringWrapper::get() const {
+  Var var(*storage_);
+  if (var.is_string()) {
+    return var.AsString();
+  } else {
+    PP_NOTREACHED();
+    return std::string();
+  }
+}
+
+void StringWrapper::set(const std::string& value) {
+  Var auto_release(PASS_REF, *storage_);
+  *storage_ = Var(value).Detach();
+}
+
+}  // namespace internal
+}  // namespace pp