1 files changed, 45 insertions, 0 deletions
diff --git a/rdoff/collectn.c b/rdoff/collectn.c
new file mode 100644
index 0000000..317c528
--- /dev/null
+++ b/rdoff/collectn.c
@@ -0,0 +1,45 @@
+/*
+ * collectn.c - implements variable length pointer arrays [collections].
+ *
+ * This file is public domain.
+ */
+
+#include "compiler.h"
+#include <stdlib.h>
+#include "collectn.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;
+}