Mirror from SNAPKITTYWEST: runtime/stdlib/bytes.py

runtime/stdlib/bytes.py

@@ -0,0 +1,24 @@
+from runtime.types import Bytes, Integer, InvalidArgument
+
+def bytes_from_list(lst) -> Bytes:
+    return Bytes(bytes([x.value if isinstance(x, Integer) else int(x) for x in lst]))
+
+def len_bytes(b: Bytes) -> Integer:
+    return Integer(len(b.data))
+
+def get_byte(b: Bytes, idx: Integer) -> Integer:
+    if idx.value < 0 or idx.value >= len(b.data):
+        raise InvalidArgument("byte index out of range")
+    return Integer(b.data[idx.value])
+
+def slice_bytes(b: Bytes, start: Integer, end: Integer) -> Bytes:
+    return Bytes(b.data[start.value:end.value])
+
+def concat_bytes(*parts) -> Bytes:
+    result = b''
+    for p in parts:
+        if isinstance(p, Bytes):
+            result += p.data
+        else:
+            raise InvalidArgument("concat expects Bytes")
+    return Bytes(result)