1 files changed, 40 insertions, 0 deletions
diff --git a/rdoff/collectn.c b/rdoff/collectn.c
new file mode 100644
index 0000000..c265c95
--- /dev/null
+++ b/rdoff/collectn.c
@@ -0,0 +1,40 @@
+/* collectn.c	Implements variable length pointer arrays [collections]
+ *
+ * This file is public domain.
+ */
+
+#include "collectn.h"
+#include <stdlib.h>
+
+void collection_init(Collection * c)
+{
+  int i;
+
+  for (i = 0; i < 32; i++) c->p[i] = NULL;
+  c->next = NULL;
+}
+
+void ** colln(Collection * c, int index)
+{
+  while (index >= 32) {
+    index -= 32;
+    if (c->next == NULL) {
+      c->next = malloc(sizeof(Collection));
+      collection_init(c->next);
+    }
+    c = c->next;
+  }
+  return &(c->p[index]);
+}
+
+void collection_reset(Collection *c)
+{
+  int i;
+  if (c->next) {
+    collection_reset(c->next);
+    free(c->next);
+  }
+
+  c->next = NULL;
+  for (i = 0; i < 32; i++) c->p[i] = NULL;
+}