build: Split out GBoxed and Serializable

The json-gobject.c is getting pretty crowded; we should split out
the JsonBoxed API and the JsonSerialized implementation into their
separate source files.

1 files changed, 275 insertions, 0 deletions

diff --git a/json-glib/json-gboxed.c b/json-glib/json-gboxed.c
new file mode 100644
index 0000000..6dd85c4
--- /dev/null
+++ b/json-glib/json-gboxed.c
@@ -0,0 +1,275 @@
+/* json-gboxed.c - JSON GBoxed integration
+ * 
+ * This file is part of JSON-GLib
+ *
+ * Copyright (C) 2007  OpenedHand Ltd.
+ * Copyright (C) 2009  Intel Corp.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * Author:
+ *   Emmanuele Bassi  <ebassi@linux.intel.com>
+ */
+
+/**
+ * SECTION:json-gboxed
+ * @short_description: Serialize and deserialize GBoxed types
+ *
+ * FIXME
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <string.h>
+#include <stdlib.h>
+
+#include "json-types-private.h"
+#include "json-gobject.h"
+
+typedef struct _BoxedTransform  BoxedTransform;
+
+struct _BoxedTransform
+{
+  GType boxed_type;
+  gint node_type;
+
+  JsonBoxedSerializeFunc serialize;
+  JsonBoxedDeserializeFunc deserialize;
+};
+
+G_LOCK_DEFINE_STATIC (boxed_transforms);
+static GSList *boxed_transforms = NULL;
+
+static gint
+boxed_transforms_cmp (gconstpointer a,
+                      gconstpointer b)
+{
+  const BoxedTransform *ta = a;
+  const BoxedTransform *tb = b;
+
+  return tb->boxed_type - ta->boxed_type;
+}
+
+static gint
+boxed_transforms_find (gconstpointer a,
+                       gconstpointer b)
+{
+  const BoxedTransform *haystack = a;
+  const BoxedTransform *needle = b;
+
+  if (needle->node_type != -1)
+    return (haystack->boxed_type == needle->boxed_type &&
+            haystack->node_type == needle->node_type) ? 0 : 1;
+  else
+    return (haystack->boxed_type == needle->boxed_type) ? 0 : 1;
+}
+
+static BoxedTransform *
+lookup_boxed_transform (GType        gboxed_type,
+                        JsonNodeType node_type)
+{
+  BoxedTransform lookup;
+  GSList *t;
+
+  lookup.boxed_type = gboxed_type;
+  lookup.node_type = node_type;
+
+  t = g_slist_find_custom (boxed_transforms, &lookup, boxed_transforms_find);
+  if (t == NULL)
+    return NULL;
+
+  return t->data;
+}
+
+/**
+ * json_boxed_register_transform_func:
+ * @gboxed_type: a boxed type
+ * @node_type: a node type
+ * @serialize_func: (allow-none): serialization function for @boxed_type
+ *   into a #JsonNode of type @node_type; can be %NULL if @deserialize_func
+ *   is not %NULL
+ * @deserialize_func: (allow-none): deserialization function for @boxed_type
+ *   from a #JsonNode of type @node_type; can be %NULL if @serialize_func
+ *   is not %NULL
+ *
+ * Registers a serialization and deserialization functions for a #GBoxed
+ * of type @gboxed_type to and from a #JsonNode of type @node_type
+ *
+ * Since: 0.10
+ */
+void
+json_boxed_register_transform_func (GType                    gboxed_type,
+                                    JsonNodeType             node_type,
+                                    JsonBoxedSerializeFunc   serialize_func,
+                                    JsonBoxedDeserializeFunc deserialize_func)
+{
+  BoxedTransform *t;
+
+  g_return_if_fail (G_TYPE_IS_BOXED (gboxed_type));
+  g_return_if_fail (G_TYPE_IS_ABSTRACT (gboxed_type) == FALSE);
+
+  if (serialize_func == NULL)
+    g_return_if_fail (deserialize_func != NULL);
+
+  if (deserialize_func == NULL)
+    g_return_if_fail (serialize_func != NULL);
+
+  G_LOCK (boxed_transforms);
+
+  t = lookup_boxed_transform (gboxed_type, node_type);
+  if (t == NULL)
+    {
+      t = g_slice_new (BoxedTransform);
+
+      t->boxed_type = gboxed_type;
+      t->node_type = node_type;
+      t->serialize = serialize_func;
+      t->deserialize = deserialize_func;
+
+      boxed_transforms = g_slist_insert_sorted (boxed_transforms, t,
+                                                boxed_transforms_cmp);
+    }
+  else
+    g_warning ("A transformation for the boxed type %s into "
+               "JSON nodes of type %s already exists",
+               g_type_name (gboxed_type),
+               json_node_type_get_name (node_type));
+
+  G_UNLOCK (boxed_transforms);
+}
+
+/**
+ * json_boxed_can_serialize:
+ * @gboxed_type: a boxed type
+ * @node_type: (out): the #JsonNode type to which the boxed type can be
+ *   deserialized into
+ *
+ * Checks whether it is possible to serialize a #GBoxed of
+ * type @gboxed_type into a #JsonNode of type @node_type
+ *
+ * Return value: %TRUE if the type can be serialized, %FALSE otherwise
+ *
+ * Since: 0.10
+ */
+gboolean
+json_boxed_can_serialize (GType         gboxed_type,
+                          JsonNodeType *node_type)
+{
+  BoxedTransform *t;
+
+  g_return_val_if_fail (G_TYPE_IS_BOXED (gboxed_type), FALSE);
+  g_return_val_if_fail (G_TYPE_IS_ABSTRACT (gboxed_type) == FALSE, FALSE);
+
+  t = lookup_boxed_transform (gboxed_type, -1);
+  if (t != NULL && t->serialize != NULL)
+    {
+      if (node_type)
+        *node_type = t->node_type;
+
+      return TRUE;
+    }
+
+  return FALSE;
+}
+
+/**
+ * json_boxed_can_deserialize:
+ * @gboxed_type: a boxed type
+ * @node_type: a #JsonNode type
+ *
+ * Checks whether it is possible to deserialize a #GBoxed of
+ * type @gboxed_type from a #JsonNode of type @node_type
+ *
+ * Return value: %TRUE if the type can be deserialized, %FALSE otherwise
+ *
+ * Since: 0.10
+ */
+gboolean
+json_boxed_can_deserialize (GType        gboxed_type,
+                            JsonNodeType node_type)
+{
+  BoxedTransform *t;
+
+  g_return_val_if_fail (G_TYPE_IS_BOXED (gboxed_type), FALSE);
+  g_return_val_if_fail (G_TYPE_IS_ABSTRACT (gboxed_type) == FALSE, FALSE);
+
+  t = lookup_boxed_transform (gboxed_type, node_type);
+  if (t != NULL && t->deserialize != NULL)
+    return TRUE;
+
+  return FALSE;
+}
+
+/**
+ * json_boxed_serialize:
+ * @gboxed_type: a boxed type
+ * @node_type: a #JsonNode type
+ * @boxed: a pointer to a #GBoxed of type @gboxed_type
+ *
+ * Serializes @boxed, a pointer to a #GBoxed of type @gboxed_type,
+ * into a #JsonNode of type @node_type
+ *
+ * Return value: a #JsonNode with the serialization of the boxed
+ *   type, or %NULL if serialization either failed or was not
+ *   possible
+ *
+ * Since: 0.10
+ */
+JsonNode *
+json_boxed_serialize (GType          gboxed_type,
+                      JsonNodeType   node_type,
+                      gconstpointer  boxed)
+{
+  BoxedTransform *t;
+
+  g_return_val_if_fail (G_TYPE_IS_BOXED (gboxed_type), NULL);
+  g_return_val_if_fail (G_TYPE_IS_ABSTRACT (gboxed_type) == FALSE, NULL);
+  g_return_val_if_fail (boxed != NULL, NULL);
+
+  t = lookup_boxed_transform (gboxed_type, node_type);
+  if (t != NULL && t->serialize != NULL)
+    return t->serialize (boxed);
+
+  return NULL;
+}
+
+/**
+ * json_boxed_serialize:
+ * @gboxed_type: a boxed type
+ * @node: a #JsonNode
+ *
+ * Deserializes @node into @boxed, a pointer to a #GBoxed of type
+ * @gboxed_type
+ *
+ * Since: 0.10
+ */
+gpointer
+json_boxed_deserialize (GType     gboxed_type,
+                        JsonNode *node)
+{
+  JsonNodeType node_type;
+  BoxedTransform *t;
+
+  g_return_val_if_fail (G_TYPE_IS_BOXED (gboxed_type), NULL);
+  g_return_val_if_fail (G_TYPE_IS_ABSTRACT (gboxed_type) == FALSE, NULL);
+  g_return_val_if_fail (node != NULL, NULL);
+
+  node_type = json_node_get_node_type (node);
+
+  t = lookup_boxed_transform (gboxed_type, node_type);
+  if (t != NULL && t->deserialize != NULL)
+    return t->deserialize (node);
+
+  return NULL;
+}