+#include <stdio.h>
+#include <string.h>
+#include <glib-object.h>
+
+#include "serializable.h"
+#include "exportable.h"
+#include "music.h"
+#include "upkg.h"
+
+#define U_MUSIC_GET_PRIV(o) \
+ G_TYPE_INSTANCE_GET_PRIVATE(o, U_MUSIC_TYPE, struct music_priv)
+
+struct music_priv {
+ unsigned type;
+
+ struct upkg_file *f;
+ size_t base, len;
+
+ unsigned char buf[2048];
+ unsigned long nbuf;
+};
+
+static void serializable_init(UPkgSerializable *s);
+static void exportable_init(UPkgExportable *e);
+
+G_DEFINE_TYPE_WITH_CODE(UMusic, u_music, G_TYPE_OBJECT,
+ G_IMPLEMENT_INTERFACE(UPKG_TYPE_SERIALIZABLE, serializable_init)
+ G_IMPLEMENT_INTERFACE(UPKG_TYPE_EXPORTABLE, exportable_init)
+);
+
+static int export(GObject *o, FILE *f)
+{
+ struct music_priv *priv = U_MUSIC_GET_PRIV(o);
+ size_t left = priv->len, rc;
+
+ unsigned char buf[1024];
+
+ if (upkg_export_seek(priv->f, priv->base, SEEK_SET) != 0)
+ return -1;
+
+ while (left > 0) {
+ rc = upkg_export_read(priv->f, buf, MIN(left, sizeof buf));
+ if (rc == 0)
+ return -1;
+ if (fwrite(buf, 1, rc, f) != rc)
+ return -1;
+ left -= rc;
+ }
+
+ return 0;
+}
+
+static int export_name(GObject *o, char *buf, size_t n)
+{
+ struct music_priv *priv = U_MUSIC_GET_PRIV(o);
+
+ return snprintf(buf, n, "%s", priv->f->name);
+}
+
+static void exportable_init(UPkgExportable *e)
+{
+ e->export = export;
+ e->export_name = export_name;
+}
+
+static int deserialize(GObject *o, struct upkg_file *f)
+{
+ struct music_priv *priv = U_MUSIC_GET_PRIV(o);
+ UMusic *m = U_MUSIC(o);
+ long size;
+
+ size_t rc;
+
+ priv->nbuf = upkg_export_read(f, priv->buf, sizeof priv->buf);
+ priv->base = 0;
+
+ /* Random field #1 */
+ if (priv->nbuf - priv->base < 2)
+ return -1;
+ // unpack_16_le(priv->buf+0);
+ priv->base += 2;
+
+ if (f->pkg->version > 61) {
+ /* Random field #2 */
+ if (priv->nbuf - priv->base < 4)
+ return -1;
+ // unpack_32_le(priv->buf+2);
+ priv->base += 4;
+ }
+
+ rc = upkg_decode_index(&size, priv->buf+priv->base, priv->nbuf-priv->base);
+ if (rc == 0 || size < 0)
+ return -1;
+
+ priv->base += rc;
+ priv->len = size;
+
+ priv->nbuf -= priv->base;
+ memmove(priv->buf, priv->buf+priv->base, priv->nbuf);
+
+ priv->f = f;
+ return 0;
+}
+
+static void serializable_init(UPkgSerializable *s)
+{
+ s->deserialize = deserialize;
+}
+
+static void u_music_init(UMusic *o)
+{
+}
+
+static void u_music_class_init(UMusicClass *class)
+{
+ g_type_class_add_private(class, sizeof (struct music_priv));
+}