Commit Graph

4 Commits

Author SHA1 Message Date
Jeff Epler
1671977ca4 py/parsenum: Fix parsing LLONG_MIN in longlong configuration.
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Re-organize `mp_parse_num_integer()` (for longlong) slightly so that the
most negative 64-bit integer can be parsed.

Fixes issue #17932.

Signed-off-by: Jeff Epler <jepler@gmail.com>
2025-08-28 11:31:03 +10:00
Yoctopuce dev
3c69277ba9 py/objint_longlong: Fix overflow check in mp_obj_int_get_checked.
This is to fix an outstanding TODO.  The test cases is using a range as
this will exist in all builds, but `mp_obj_get_int` is used in many
different parts of code where an overflow is more likely to occur.

Signed-off-by: Yoctopuce dev <dev@yoctopuce.com>
2025-07-29 00:27:01 +10:00
Angus Gratton
516aa02104 py/objint_longlong: Add arithmetic overflow checks.
Long long big integer support now raises an exception on overflow rather
than returning an undefined result.

Also adds an error when shifting by a negative value.

The new arithmetic checks are added in the misc.h header.

This work was funded through GitHub Sponsors.

Signed-off-by: Angus Gratton <angus@redyak.com.au>
2025-07-18 00:12:05 +10:00
Angus Gratton
2d8d64059f tests: Add specific tests for "long long" 64-bit bigints.
These will run on all ports which support them, but importantly
they'll also run on ports that don't support arbitrary precision
but do support 64-bit long ints.

Includes some test workarounds to account for things which will overflow
once "long long" big integers overflow (added in follow-up commit):

- uctypes_array_load_store test was failing already, now won't parse.
- all the ffi_int tests contain 64-bit unsigned values, that won't parse
  as long long.

This work was funded through GitHub Sponsors.

Signed-off-by: Angus Gratton <angus@redyak.com.au>
2025-07-18 00:10:44 +10:00