Yukihiro "Matz" Matsumoto 8f259fb560 mruby-bigint, mruby-numeric-ext: fix Integer#pow with negative modulus ...

Support negative modulus in Integer#pow(exp, mod) with proper Ruby
semantics. Previously, negative modulus caused an infinite loop in
Barrett reduction. Now:

- Use absolute value of modulus for computation
- Apply signed modulo adjustment (result + m for non-zero result
  when m is negative)
- Add early return for zero base with positive exponent (0^n = 0)

Co-authored-by: Claude <noreply@anthropic.com>

2025-12-30 16:25:49 +09:00

..

numeric_ext.c

mruby-bigint, mruby-numeric-ext: fix Integer#pow with negative modulus

2025-12-30 16:25:49 +09:00