1 files changed, 96 insertions, 0 deletions
diff --git a/libbanshee/engine/array.c b/libbanshee/engine/array.c
new file mode 100644
index 00000000000..be297533fa6
--- /dev/null
+++ b/libbanshee/engine/array.c
@@ -0,0 +1,96 @@
+/*
+ * Copyright (c) 2000-2001
+ *      The Regents of the University of California.  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.
+ * 3. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
+ *
+ */
+
+#include <regions.h>
+#include <assert.h>
+#include <limits.h>
+#include "array.h"
+
+struct array {
+  region sameregion r;
+  void *sameregion data;
+  size_t elemsize;
+  type_t elemtype;
+  size_t nelems, nalloc;
+};
+
+struct array *new_array(region r, size_t initialsize,
+			size_t typesize, type_t typeinfo)
+{
+  struct array *a = ralloc(r, struct array);
+
+  a->r = r;
+  a->data = typed_rarrayalloc(r, initialsize, typesize, typeinfo);
+  a->elemsize = typesize;
+  a->elemtype = typeinfo;
+  a->nelems = 0;
+  a->nalloc = initialsize;
+
+  return a;
+}
+
+void *array_extend(struct array *a, int by)
+{
+  size_t oldelems = a->nelems;
+
+  if (by < 0)
+    assert(((unsigned int)-by) <= a->nelems && by != INT_MIN);
+  else if (a->nelems + by > a->nalloc)
+    {
+      size_t newsize = a->nalloc * 2 + by;
+      void *newdata = typed_rarrayalloc(a->r, newsize, a->elemsize, a->elemtype);
+
+      /* XXX: could work harder to support really large array sizes
+	 (this code will fail for a->nalloc >= (max(size_t)-by)/2) */
+      assert(newsize > a->nalloc); /* die when we get really big */
+      typed_rarraycopy(newdata, a->data, a->nelems, a->elemsize, a->elemtype);
+      a->data = newdata;
+      a->nalloc = newsize;
+    }
+  a->nelems += by;
+
+  return (char *)a->data + a->elemsize * oldelems;
+}
+
+void array_reset(struct array *a)
+{
+  a->nelems = 0;
+}
+
+size_t array_length(struct array *a)
+{
+  return a->nelems;
+}
+
+void *array_data(struct array *a)
+{
+  return a->data;
+}
+