LibCore: Put all classes in the Core namespace and remove the leading C

I've been wanting to do this for a long time. It's time we start being
consistent about how this stuff works.

The new convention is:

- "LibFoo" is a userspace library that provides the "Foo" namespace.

That's it :^) This was pretty tedious to convert and I didn't even
start on LibGUI yet. But it's coming up next.

Applications/SystemMonitor/DevicesModel.cpp

@@ -121,8 +121,8 @@ GVariant DevicesModel::data(const GModelIndex& index, Role) const
 
 void DevicesModel::update()
 {
-    auto proc_devices = CFile::construct("/proc/devices");
-    if (!proc_devices->open(CIODevice::OpenMode::ReadOnly))
+    auto proc_devices = Core::File::construct("/proc/devices");
+    if (!proc_devices->open(Core::IODevice::OpenMode::ReadOnly))
         ASSERT_NOT_REACHED();
 
     auto json = JsonValue::from_string(proc_devices->read_all()).as_array();
@@ -148,7 +148,7 @@ void DevicesModel::update()
     });
 
     auto fill_in_paths_from_dir = [this](const String& dir) {
-        CDirIterator dir_iter { dir, CDirIterator::Flags::SkipDots };
+        Core::DirIterator dir_iter { dir, Core::DirIterator::Flags::SkipDots };
         while (dir_iter.has_next()) {
             auto name = dir_iter.next_path();
             auto path = String::format("%s/%s", dir.characters(), name.characters());

Applications/SystemMonitor/MemoryStatsWidget.cpp

@@ -93,8 +93,8 @@ static inline size_t bytes_to_kb(size_t bytes)
 
 void MemoryStatsWidget::refresh()
 {
-    auto proc_memstat = CFile::construct("/proc/memstat");
-    if (!proc_memstat->open(CIODevice::OpenMode::ReadOnly))
+    auto proc_memstat = Core::File::construct("/proc/memstat");
+    if (!proc_memstat->open(Core::IODevice::OpenMode::ReadOnly))
         ASSERT_NOT_REACHED();
 
     auto file_contents = proc_memstat->read_all();

Applications/SystemMonitor/NetworkStatisticsWidget.cpp

@@ -81,7 +81,7 @@ NetworkStatisticsWidget::NetworkStatisticsWidget(GWidget* parent)
         net_tcp_fields.empend("bytes_out", "Bytes Out", TextAlignment::CenterRight);
         m_socket_table_view->set_model(GJsonArrayModel::create("/proc/net/tcp", move(net_tcp_fields)));
 
-        m_update_timer = CTimer::construct(
+        m_update_timer = Core::Timer::construct(
             1000, [this] {
                 update_models();
             },

Applications/SystemMonitor/NetworkStatisticsWidget.h

@@ -42,5 +42,5 @@ private:
 
     RefPtr<GTableView> m_adapter_table_view;
     RefPtr<GTableView> m_socket_table_view;
-    RefPtr<CTimer> m_update_timer;
+    RefPtr<Core::Timer> m_update_timer;
 };

Applications/SystemMonitor/ProcessMemoryMapWidget.cpp

@@ -73,7 +73,7 @@ ProcessMemoryMapWidget::ProcessMemoryMapWidget(GWidget* parent)
     m_json_model = GJsonArrayModel::create({}, move(pid_vm_fields));
     m_table_view->set_model(GSortingProxyModel::create(*m_json_model));
     m_table_view->model()->set_key_column_and_sort_order(0, GSortOrder::Ascending);
-    m_timer = CTimer::construct(1000, [this] { refresh(); }, this);
+    m_timer = Core::Timer::construct(1000, [this] { refresh(); }, this);
 }
 
 ProcessMemoryMapWidget::~ProcessMemoryMapWidget()

Applications/SystemMonitor/ProcessMemoryMapWidget.h

@@ -28,7 +28,10 @@
 
 #include <LibGUI/GWidget.h>
 
-class CTimer;
+namespace Core {
+class Timer;
+}
+
 class GJsonArrayModel;
 class GTableView;
 
@@ -45,5 +48,5 @@ private:
     RefPtr<GTableView> m_table_view;
     RefPtr<GJsonArrayModel> m_json_model;
     pid_t m_pid { -1 };
-    RefPtr<CTimer> m_timer;
+    RefPtr<Core::Timer> m_timer;
 };

Applications/SystemMonitor/ProcessModel.cpp

@@ -335,7 +335,7 @@ GVariant ProcessModel::data(const GModelIndex& index, Role role) const
 
 void ProcessModel::update()
 {
-    auto all_processes = CProcessStatisticsReader::get_all();
+    auto all_processes = Core::ProcessStatisticsReader::get_all();
 
     unsigned last_sum_times_scheduled = 0;
     for (auto& it : m_threads)

Applications/SystemMonitor/ProcessStacksWidget.cpp

@@ -37,7 +37,7 @@ ProcessStacksWidget::ProcessStacksWidget(GWidget* parent)
     m_stacks_editor = GTextEditor::construct(GTextEditor::Type::MultiLine, this);
     m_stacks_editor->set_readonly(true);
 
-    m_timer = CTimer::construct(1000, [this] { refresh(); }, this);
+    m_timer = Core::Timer::construct(1000, [this] { refresh(); }, this);
 }
 
 ProcessStacksWidget::~ProcessStacksWidget()
@@ -54,8 +54,8 @@ void ProcessStacksWidget::set_pid(pid_t pid)
 
 void ProcessStacksWidget::refresh()
 {
-    auto file = CFile::construct(String::format("/proc/%d/stack", m_pid));
-    if (!file->open(CIODevice::ReadOnly)) {
+    auto file = Core::File::construct(String::format("/proc/%d/stack", m_pid));
+    if (!file->open(Core::IODevice::ReadOnly)) {
         m_stacks_editor->set_text(String::format("Unable to open %s", file->filename().characters()));
         return;
     }

Applications/SystemMonitor/ProcessStacksWidget.h

@@ -29,7 +29,9 @@
 #include <LibGUI/GTextEditor.h>
 #include <LibGUI/GWidget.h>
 
-class CTimer;
+namespace Core {
+class Timer;
+}
 
 class ProcessStacksWidget final : public GWidget {
     C_OBJECT(ProcessStacksWidget)
@@ -43,5 +45,5 @@ public:
 private:
     pid_t m_pid { -1 };
     RefPtr<GTextEditor> m_stacks_editor;
-    RefPtr<CTimer> m_timer;
+    RefPtr<Core::Timer> m_timer;
 };

Applications/SystemMonitor/main.cpp

@@ -146,7 +146,7 @@ int main(int argc, char** argv)
     toolbar->set_has_frame(false);
     auto process_table_view = ProcessTableView::construct(process_table_container);
 
-    auto refresh_timer = CTimer::construct(1000, [&] {
+    auto refresh_timer = Core::Timer::construct(1000, [&] {
         process_table_view->refresh();
         if (auto* memory_stats_widget = MemoryStatsWidget::the())
             memory_stats_widget->refresh();