Simplify non-finite number functions and handling

[mborland]

Closes: #697

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 95.89041% with 3 lines in your changes missing coverage. Please review.

Project coverage is 99.2%. Comparing base (ae81dea) to head (55bfdeb).

Additional details and impacted files

[](https://app.codecov.io/gh/cppalliance/decimal/pull/699?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=cppalliance) ```diff @@ Coverage Diff @@ ## develop #699 +/- ## ========================================= + Coverage 99.1% 99.2% +0.1% ========================================= Files 230 230 Lines 16307 16290 -17 Branches 1742 1757 +15 ========================================= - Hits 16160 16146 -14 + Misses 147 144 -3 ``` | [Files](https://app.codecov.io/gh/cppalliance/decimal/pull/699?dropdown=coverage&src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=cppalliance) | Coverage Δ | | |---|---|---| | [include/boost/decimal/decimal128.hpp](https://app.codecov.io/gh/cppalliance/decimal/pull/699?src=pr&el=tree&filepath=include%2Fboost%2Fdecimal%2Fdecimal128.hpp&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=cppalliance#diff-aW5jbHVkZS9ib29zdC9kZWNpbWFsL2RlY2ltYWwxMjguaHBw) | `98.1% <100.0%> (+0.3%)` | :arrow_up: | | [include/boost/decimal/decimal128\_fast.hpp](https://app.codecov.io/gh/cppalliance/decimal/pull/699?src=pr&el=tree&filepath=include%2Fboost%2Fdecimal%2Fdecimal128_fast.hpp&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=cppalliance#diff-aW5jbHVkZS9ib29zdC9kZWNpbWFsL2RlY2ltYWwxMjhfZmFzdC5ocHA=) | `97.5% <100.0%> (+1.3%)` | :arrow_up: | | [include/boost/decimal/decimal32.hpp](https://app.codecov.io/gh/cppalliance/decimal/pull/699?src=pr&el=tree&filepath=include%2Fboost%2Fdecimal%2Fdecimal32.hpp&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=cppalliance#diff-aW5jbHVkZS9ib29zdC9kZWNpbWFsL2RlY2ltYWwzMi5ocHA=) | `99.8% <100.0%> (-<0.1%)` | :arrow_down: | | [include/boost/decimal/decimal64.hpp](https://app.codecov.io/gh/cppalliance/decimal/pull/699?src=pr&el=tree&filepath=include%2Fboost%2Fdecimal%2Fdecimal64.hpp&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=cppalliance#diff-aW5jbHVkZS9ib29zdC9kZWNpbWFsL2RlY2ltYWw2NC5ocHA=) | `99.3% <100.0%> (-<0.1%)` | :arrow_down: | | [include/boost/decimal/decimal32\_fast.hpp](https://app.codecov.io/gh/cppalliance/decimal/pull/699?src=pr&el=tree&filepath=include%2Fboost%2Fdecimal%2Fdecimal32_fast.hpp&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=cppalliance#diff-aW5jbHVkZS9ib29zdC9kZWNpbWFsL2RlY2ltYWwzMl9mYXN0LmhwcA==) | `97.1% <91.0%> (-<0.1%)` | :arrow_down: | | [include/boost/decimal/decimal64\_fast.hpp](https://app.codecov.io/gh/cppalliance/decimal/pull/699?src=pr&el=tree&filepath=include%2Fboost%2Fdecimal%2Fdecimal64_fast.hpp&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=cppalliance#diff-aW5jbHVkZS9ib29zdC9kZWNpbWFsL2RlY2ltYWw2NF9mYXN0LmhwcA==) | `98.6% <91.0%> (-<0.1%)` | :arrow_down: | | [include/boost/decimal/detail/cmath/fpclassify.hpp](https://app.codecov.io/gh/cppalliance/decimal/pull/699?src=pr&el=tree&filepath=include%2Fboost%2Fdecimal%2Fdetail%2Fcmath%2Ffpclassify.hpp&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=cppalliance#diff-aW5jbHVkZS9ib29zdC9kZWNpbWFsL2RldGFpbC9jbWF0aC9mcGNsYXNzaWZ5LmhwcA==) | `87.5% <66.7%> (-2.5%)` | :arrow_down: | ... and [6 files with indirect coverage changes](https://app.codecov.io/gh/cppalliance/decimal/pull/699/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=cppalliance) ------ [Continue to review full report in Codecov by Sentry](https://app.codecov.io/gh/cppalliance/decimal/pull/699?dropdown=coverage&src=pr&el=continue&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=cppalliance). > **Legend** - [Click here to learn more](https://docs.codecov.io/docs/codecov-delta?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=cppalliance) > `Δ = absolute (impact)`, `ø = not affected`, `? = missing data` > Powered by [Codecov](https://app.codecov.io/gh/cppalliance/decimal/pull/699?dropdown=coverage&src=pr&el=footer&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=cppalliance). Last update [ae81dea...55bfdeb](https://app.codecov.io/gh/cppalliance/decimal/pull/699?dropdown=coverage&src=pr&el=lastupdated&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=cppalliance). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=cppalliance).