Fix locale-dependent JSON float parsing (Issue #241) #255
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strtod() respects LC_NUMERIC locale, causing JSON parsing to fail in non-C locales (French, German, etc.) where comma is the decimal separator. Implemented custom locale-independent strtod_c() parser: - Always uses '.' as decimal separator per JSON spec - Handles sign, integer, fractional, and exponent parts - No platform dependencies or thread-safety issues - Simple and portable (~87 lines) Added test_vec0_locale_independent() to verify parsing works under non-C locales. All tests pass (73 passed, 4 skipped). Fixes asg017#241 and asg017#168
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Summary
This PR syncs a commit ported from an upstream fork into this repo to fix locale-dependent JSON float parsing.
Original commit
strtod()usage when parsing JSON numeric tokens with a locale-independentstrtod_c()implementation, ensuring JSON floats are always parsed using.as the decimal separator (per JSON spec).Why it fits this repo’s guidelines/policies
.as the decimal separator; parsing should not vary based onLC_NUMERIC.strtod_l()/ global locale switching, which can be inconsistent across platforms and tricky for thread-safety.Notes (if any adaptations):
Why it’s useful here
Clocales (e.g. French/German).Testing
uv sync --directory tests(pass)make test-loadable python=./tests/.venv/bin/python(pass)Cnumeric locale and verifies JSON float parsing remains correct.