Roland Reichwein 9765cbf764 Fix format: float zero-padding, nested replacement width, octal alternate form, and extreme doubles (#1442) ... format.h: - Fix float zero-padding ({:010f}): output sign first, then zero-fill, then the unsigned formatted value, matching std::format behavior. - Fix nested replacement fields ({:{}d}): consume the value's auto-index in parse_format_spec before parsing nested width/precision fields, so auto-indexing order matches the C++ standard. - Fix {:#o} with value 0: produce "0" instead of "00" by skipping the octal prefix when the value is zero. - Fix format_floating_default overflow for extreme doubles (DBL_MIN, DBL_MAX): fall back to scientific notation for values >= 1e18 or tiny positives < 1e-6, delegating to format_floating_e. - Fix format_floating_e precision loss: replace iterative multiply-by-10 normalization loop with O(1) log10/pow/floor computation. - Add resolve_nested_replacements helper to extract width/precision from format args at formatting time. test_format.cpp: - Add tests for float zero-padding, nested replacement width, octal alternate form with zero, float sign/width/alignment, negative floats, scientific notation for large/small values, default-to-scientific switch, positive zero, brace escaping, and integer limits. format.h + platform.h: - log10l fix for different toolchain support: Define ETL_FORMAT_NO_LONG_DOUBLE_MATH in the profile if libm doesn't provide log10l. This is identified by linker error missing this symbol. It was identified with the llvm/clang cross toolchain for ARM.		2026-05-26 04:19:42 +01:00
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etl	Fix format: float zero-padding, nested replacement width, octal alternate form, and extreme doubles (#1442)	2026-05-26 04:19:42 +01:00