Lerking/micropython
1
0
Fork 0
mirror of https://github.com/micropython/micropython.git synced 2026-01-07 20:50:14 +01:00
Code Issues Actions 27 Packages Projects Releases Wiki Activity

py: Rename mp_obj_int_get to mp_obj_int_get_truncated; fix struct.pack.

Browse Source 
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.
This commit is contained in:
Damien George
2014-12-05 23:13:52 +00:00
parent 451a087075
commit be6d8be91e
13 changed files with 37 additions and 20 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
tests/basics/struct1.py
View File

@@ -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"))