1 files changed, 136 insertions, 0 deletions
diff --git a/src/unit-category.c b/src/unit-category.c
new file mode 100644
index 0000000..56a90e2
--- /dev/null
+++ b/src/unit-category.c
@@ -0,0 +1,136 @@
+/*
+ * Copyright (C) 1987-2008 Sun Microsystems, Inc. All Rights Reserved.
+ * Copyright (C) 2008-2011 Robert Ancell.
+ * 
+ * This program is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by the Free Software
+ * Foundation, either version 2 of the License, or (at your option) any later
+ * version. See http://www.gnu.org/copyleft/gpl.html the full text of the
+ * license.
+ */
+
+#include <string.h>
+
+#include "unit-category.h"
+
+struct UnitCategoryPrivate
+{
+    gchar *name;
+    gchar *display_name;
+    GList *units;
+};
+
+G_DEFINE_TYPE (UnitCategory, unit_category, G_TYPE_OBJECT);
+
+
+UnitCategory *
+unit_category_new(const gchar *name, const gchar *display_name)
+{
+    UnitCategory *category = g_object_new(unit_category_get_type(), NULL);
+    category->priv->name = g_strdup(name);
+    category->priv->display_name = g_strdup(display_name);
+    return category;
+}
+
+
+const gchar *
+unit_category_get_name(UnitCategory *category)
+{
+    g_return_val_if_fail (category != NULL, NULL);
+    return category->priv->name;
+}
+
+
+const gchar *
+unit_category_get_display_name(UnitCategory *category)
+{
+    g_return_val_if_fail (category != NULL, NULL);
+    return category->priv->display_name;
+}
+
+
+void
+unit_category_add_unit(UnitCategory *category, Unit *unit)
+{
+    g_return_if_fail (category != NULL);
+    g_return_if_fail (unit != NULL);
+    category->priv->units = g_list_append(category->priv->units, g_object_ref(unit));
+}
+
+
+Unit *
+unit_category_get_unit_by_name(UnitCategory *category, const gchar *name)
+{
+    GList *iter;
+
+    g_return_val_if_fail (category != NULL, NULL);
+    g_return_val_if_fail (name != NULL, NULL);
+
+    for (iter = category->priv->units; iter; iter = iter->next)
+    {
+        Unit *unit = iter->data;
+        if (strcmp(unit_get_name(unit), name) == 0)
+            return unit;
+    }
+  
+    return NULL;
+}
+
+
+Unit *
+unit_category_get_unit_by_symbol(UnitCategory *category, const gchar *symbol)
+{
+    GList *iter;
+
+    g_return_val_if_fail (category != NULL, NULL);
+    g_return_val_if_fail (symbol != NULL, NULL);
+
+    for (iter = category->priv->units; iter; iter = iter->next) {
+        Unit *unit = iter->data;
+        if (unit_matches_symbol(unit, symbol))
+            return unit;
+    }
+
+    return NULL;
+}
+
+
+const GList *
+unit_category_get_units(UnitCategory *category)
+{
+    g_return_val_if_fail (category != NULL, NULL);
+    return category->priv->units;
+}
+
+
+gboolean
+unit_category_convert(UnitCategory *category, const MPNumber *x, Unit *x_units, Unit *z_units, MPNumber *z)
+{
+    MPNumber t;
+
+    g_return_val_if_fail (category != NULL, FALSE);
+    g_return_val_if_fail (x_units != NULL, FALSE);
+    g_return_val_if_fail (z_units != NULL, FALSE);
+    g_return_val_if_fail (z != NULL, FALSE);
+
+    if (!unit_convert_from(x_units, x, &t))
+        return FALSE;
+    if (!unit_convert_to(z_units, &t, z))
+        return FALSE;
+
+    return TRUE;
+}
+
+
+static void
+unit_category_class_init(UnitCategoryClass *klass)
+{
+    g_type_class_add_private(klass, sizeof(UnitCategoryPrivate));
+}
+
+
+static void
+unit_category_init(UnitCategory *category)
+{
+    category->priv = G_TYPE_INSTANCE_GET_PRIVATE(category, unit_category_get_type(), UnitCategoryPrivate);
+}