From be6d8be91e133e98117025062df0e63aaf87efd2 Mon Sep 17 00:00:00 2001
From: Damien George
Date: Fri, 5 Dec 2014 23:13:52 +0000
Subject: py: Rename mp_obj_int_get to mp_obj_int_get_truncated; fix
 struct.pack.

mp_obj_int_get_truncated is used as a "fast path" int accessor that
doesn't check for overflow and returns the int truncated to the machine
word size, ie mp_int_t.

Use mp_obj_int_get_truncated to fix struct.pack when packing maximum word
sized values.

Addresses issues #779 and #998.
---
 tests/basics/struct1.py | 12 ++++++++++++
 1 file changed, 12 insertions(+)

(limited to 'tests')

diff --git a/tests/basics/struct1.py b/tests/basics/struct1.py
index c3049c55d..cebffc142 100644
--- a/tests/basics/struct1.py
+++ b/tests/basics/struct1.py
@@ -25,3 +25,15 @@ print(struct.pack("<6sH", b"foo", 10000))
 s = struct.pack("BHBI", 10, 100, 200, 300)
 v = struct.unpack("BHBI", s)
 print(v == (10, 100, 200, 300))
+
+# check maximum pack on 32-bit machine
+print(struct.pack("<I", 2**32 - 1))
+print(struct.pack("<I", 0xffffffff))
+
+# fails on 32-bit machine
+#print(struct.pack("<Q", 2**64 - 1))
+#print(struct.pack("<Q", 0xffffffffffffffff))
+
+# check maximum unpack
+print(struct.unpack("<I", b"\xff\xff\xff\xff"))
+print(struct.unpack("<Q", b"\xff\xff\xff\xff\xff\xff\xff\xff"))
-- 
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