A function to parse floating point hexadecimal strings as defined by the WebAssembly specification
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A JavaScript function to parse floating point hexadecimals as defined by the WebAssembly specification.
``javascript
import parseHexFloat from 'webassembly-floating-point-hex-parser'
parseHexFloat('0x1p-1') // 0.5
parseHexFloat('0x1.921fb54442d18p+2') // 6.283185307179586
`
This module is tested in two ways. The first one is through a small set of test cases that can be found in test/regular.test.js. The second one is non-deterministic (sometimes called fuzzing):
1. Generate a random IEEE754 double precision value x.y
1. Compute its representation in floating point hexadecimal format using the C standard library function printf since C supports this format.parseHexFloat(y) === x
1. Give both values to JS testcase and see if .
By default one npm test run tests 100 random samples. If you want to do more, you can set the environment variable FUZZ_AMOUNT` to whatever number of runs you'd like. Because it uses one child process for each sample, it is really slow though. For more details about the randomized tests see the source.
* maurobringolf.ch/2017/12/hexadecimal-floating-point-notation/