radix-ecmascript

Allows conversion to radix representation for floating-point types (f32 and f64) in pure Rust, just like in ECMAScript ((0.5).toString(16), (0.5).toString(36) etc.).

This library implements ECMAScript Language Specification Section 9.8.1 "ToString Applied to the Number Type".

Add as a dependency

cargo add radix-ecmascript

Example

use radix_ecmascript::ToRadixStr;

fn main() {
    println!("{}", (0.123).to_radix_str(16).unwrap());
}

This will print 0.1f7ced916872b. The same can be achieved via calling (0.123).toString(16) in JavaScript.

Note in this example that we unwrap the Result<String, InvalidBaseError>. In a real case, you should probably have proper error propagation, however it's good to know that to_radix_str will only return an InvalidBaseError if the given base is outside the valid range (radix_ecmascript::MIN_BASE and radix_ecmascript::MAX_BASE), so if you're passing in a constant you can safely unwrap the error.

Contributing

When contributing, please make sensible contributions in your pull requests. You also need to include the copyright template in any new files you create. The following template is for JetBrains IDE's, however you can add the header to files manually (if required) with minor modifications. You should also add your own name.

Copyright (c) $originalComment.match("Copyright \(c\) (\d+)", 1, "-", "$today.year")$today.year Levi-Michael Taylor. All rights reserved.

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

This library implements logic found in Google's open-source V8 library, specifically:
* double.h (https://github.com/v8/v8/blob/f83601408c3207211bc8eb82a8802b01fd82c775/src/numbers/double.h)
* DoubleToRadixCString (https://github.com/v8/v8/blob/f83601408c3207211bc8eb82a8802b01fd82c775/src/numbers/conversions.cc#L1269)
Copyright 2014, the V8 project authors. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
* Redistributions of source code must retain the above copyright
   notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above
   copyright notice, this list of conditions and the following
   disclaimer in the documentation and/or other materials provided
   with the distribution.
* Neither the name of Google Inc. nor the names of its
   contributors may be used to endorse or promote products derived
   from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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This license can also be found at: https://github.com/v8/v8/blob/f83601408c3207211bc8eb82a8802b01fd82c775/LICENSE