sequence.c: Start to refactor sequence operations for reuse among types.

1 files changed, 25 insertions, 0 deletions

diff --git a/py/sequence.c b/py/sequence.c
new file mode 100644
index 0000000000..af3c61af6e
--- /dev/null
+++ b/py/sequence.c
@@ -0,0 +1,25 @@
+#include <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+#include <assert.h>
+
+#include "nlr.h"
+#include "misc.h"
+#include "mpconfig.h"
+#include "mpqstr.h"
+#include "obj.h"
+#include "map.h"
+#include "runtime0.h"
+#include "runtime.h"
+
+// Helpers for sequence types
+
+// Implements backend of sequence * integer operation. Assumes elements are
+// memory-adjacent in sequence.
+void mp_seq_multiply(const void *items, uint item_sz, uint len, uint times, void *dest) {
+    for (int i = 0; i < times; i++) {
+        uint copy_sz = item_sz * len;
+        memcpy(dest, items, copy_sz);
+        dest = (char*)dest + copy_sz;
+    }
+}