Code generation for extensions api

tools/json_schema_compiler/util.cc

Index: tools/json_schema_compiler/util.cc
diff --git a/tools/json_schema_compiler/util.cc b/tools/json_schema_compiler/util.cc
new file mode 100644
index 0000000000000000000000000000000000000000..38e6b30674e75bb39bdae1d90314390fb1d32d94
--- /dev/null
+++ b/tools/json_schema_compiler/util.cc
@@ -0,0 +1,82 @@
+// 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 "tools/json_schema_compiler/util.h"
+
+#include "base/values.h"
+
+namespace json_schema_compiler {
+namespace util {
+
+bool GetStrings(
+    const base::DictionaryValue& from,
+    const std::string& name,
+    std::vector<std::string>* out) {
+  base::ListValue* list = NULL;
+  if (!from.GetListWithoutPathExpansion(name, &list))
+    return false;
+
+  std::string string;
+  for (size_t i = 0; i < list->GetSize(); ++i) {
+    if (!list->GetString(i, &string))
+      return false;
+    out->push_back(string);
+  }
+
+  return true;
+}
+
+bool GetOptionalStrings(
+    const base::DictionaryValue& from,
+    const std::string& name,
+    scoped_ptr<std::vector<std::string> >* out) {
+  base::ListValue* list = NULL;
+  {
+    base::Value* maybe_list = NULL;
+    // Since |name| is optional, its absence is acceptable. However, anything
+    // other than a ListValue is not.
+    if (!from.GetWithoutPathExpansion(name, &maybe_list))
+      return true;
+    if (!maybe_list->IsType(base::Value::TYPE_LIST))
+      return false;
+    list = static_cast<base::ListValue*>(maybe_list);
+  }
+
+  out->reset(new std::vector<std::string>());
+  std::string string;
+  for (size_t i = 0; i < list->GetSize(); ++i) {
+    if (!list->GetString(i, &string)) {
+      out->reset();
+      return false;
+    }
+    (*out)->push_back(string);
+  }
+
+  return true;
+}
+
+void SetStrings(
+    const std::vector<std::string>& from,
+    const std::string& name,
+    base::DictionaryValue* out) {
+  base::ListValue* list = new base::ListValue();
+  out->SetWithoutPathExpansion(name, list);
+  for (std::vector<std::string>::const_iterator it = from.begin();
+      it != from.end(); ++it) {
+    list->Append(base::Value::CreateStringValue(*it));
+  }
+}
+
+void SetOptionalStrings(
+    const scoped_ptr<std::vector<std::string> >& from,
+    const std::string& name,
+    base::DictionaryValue* out) {
+  if (!from.get())
+    return;
+
+  SetStrings(*from, name, out);
+}
+
+}  // namespace api_util
+}  // namespace extensions