LibIPC: Add a simple IPC::Dictionary type (String key -> String value)

1 files changed, 60 insertions, 0 deletions

diff --git a/Libraries/LibIPC/Dictionary.h b/Libraries/LibIPC/Dictionary.h
new file mode 100644
index 0000000000..f272ec9165
--- /dev/null
+++ b/Libraries/LibIPC/Dictionary.h
@@ -0,0 +1,60 @@
+/*
+ * Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+
+#include <AK/HashMap.h>
+#include <AK/String.h>
+
+namespace IPC {
+
+class Dictionary {
+public:
+    Dictionary() {}
+
+    bool is_empty() const { return m_entries.is_empty(); }
+    size_t size() const { return m_entries.size(); }
+
+    void add(String key, String value)
+    {
+        m_entries.set(move(key), move(value));
+    }
+
+    template<typename Callback>
+    void for_each_entry(Callback callback) const
+    {
+        for (auto& it : m_entries) {
+            callback(it.key, it.value);
+        }
+    }
+
+    const HashMap<String, String>& entries() const { return m_entries; }
+
+private:
+    HashMap<String, String> m_entries;
+};
+
+}