stuff

1 files changed, 23 insertions, 0 deletions

diff --git a/lib/cbit/cqueue.c b/lib/cbit/cqueue.c
new file mode 100644
index 0000000..aebc265
--- /dev/null
+++ b/lib/cbit/cqueue.c
@@ -0,0 +1,23 @@
+#include "circle.h"
+
+void cqueue_realloc_internal(struct cqueue_internal *ci,
+                             size_t new_capacity_bytes) {
+    char *storage = (char *) malloc(new_capacity_bytes);
+    char *new_write_ptr;
+    if (c->write_ptr >= c->read_ptr) {
+        size_t diff = c->write_ptr - c->read_ptr;
+        memcpy(storage, c->read_ptr, diff);
+        new_write_ptr = storage + diff;
+    } else {
+        size_t diff1 = c->end - c->read_ptr;
+        size_t diff2 = c->write_ptr - c->start;
+        memcpy(storage, c->read_ptr, diff1);
+        char *tmp = storage + diff1;
+        memcpy(tmp, c->start, diff2);
+        new_write_ptr = tmp + diff2;
+    }
+    c->start = storage;
+    c->end = storage + new_capacity_bytes;
+    c->read_ptr = storage;
+    c->write_ptr = new_write_ptr;
+}