File: memoryview_slice_size.py

package info (click to toggle)
micropython 1.25.0%2Bds-1
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 48,944 kB
  • sloc: ansic: 317,850; python: 59,539; xml: 4,241; makefile: 3,530; sh: 1,421; javascript: 744; asm: 681; cpp: 45; exp: 11; pascal: 6
file content (27 lines) | stat: -rw-r--r-- 594 bytes parent folder | download
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
# test memoryview slicing beyond the limit of what memoryview can internally index

try:
    from sys import maxsize
    from uctypes import bytearray_at

    memoryview
except:
    print("SKIP")
    raise SystemExit

if maxsize <= 0xFFFF_FFFF:
    slice_max = 0xFF_FFFF
else:
    slice_max = 0xFF_FFFF_FFFF_FFFF

buf = bytearray_at(0, slice_max + 2)
mv = memoryview(buf)

# this should work
print(mv[slice_max : slice_max + 1])

# this should overflow the internal index for memoryview slicing
try:
    print(mv[slice_max + 1 : slice_max + 2])
except OverflowError:
    print("OverflowError")