package dtoa

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Converts OCaml floats into strings, using the efficient Grisu3 algorithm

Install 

dune-project
 Dependency

github.com Readme Changelog Edit opam file Versions (5)

Authors

  1. M
    Marshall Roch <mroch@fb.com>

Maintainers

  1. M
    Marshall Roch <mroch@fb.com>

Sources

dtoa-0.1.tar.gz
sha256=7501ae1806147660a71634494f9dd5eccfedbbd387c5f3a44173e4e289fdb08b
md5=40cb786876812a7e70ab5a7cf4094829

Description

A library for converting floats to strings (doubles to ascii, "d to a").

This is a (partial) port of Google's double-conversion library from C++ to C.

Added to opam-repository:

README

ocaml-dtoa

This library provides a function that converts OCaml floats into strings, using the efficient Grisu3 algorithm.

The Grisu3 algorithm is described in "Printing Floating-Point Numbers Quickly And Accurately with Integers" by Florian Loitsch.

The implementation is adapted from double-conversion.

Current Status

Currently, this library exposes three functions:

  • ecma_string_of_float : float -> string: formats the float according to the ECMAScript specification's implementation of Number.prototype.toString. Notably, the output of this function is valid JSON.
  • shortest_string_of_float : float -> string: formats the float as compactly as possible, for example returning 123e6 instead of 123000000 or 1.23e+08.
  • g_fmt : float -> string: formats the float in the same way as David M. Gay's g_fmt.

The underlying fast_dtoa() function computes the significand and exponent, which are formatted by the above functions in dtoa_stubs.c. It is a port of the double-conversion library from C++ to C.

Many features of double-conversion are still missing. Patches are welcome!

License

ocaml-dtoa is BSD-licensed. We also provide an additional patent grant.

Author

ocaml-dtoa was created by Facebook for the Flow project.

Dependencies (5)

  1. topkg build & >= "0.9.0" & < "1.1.0"
  2. ocb-stubblr build
  3. ocamlbuild build
  4. ocamlfind build
  5. ocaml >= "4.01.0"

Dev Dependencies (1)

  1. ounit with-test & >= "2.0.0"

Optional Dependencies

None

Used by

None

Conflicts

None

Build status

Results of building dtoa with each compiler on check.ci.ocaml.org, run of against opam-repository 8a77e58. All results for this package.

Each result links to its build log. To keep crawlers from overloading the site, build logs require a GitHub sign-in (see ocurrent/opam-health-check). On your first log, GitHub asks you to “Authorize opam-health-check”, the OCurrent app that runs these checks; it sees only your public profile, not your repositories. The sign-in lasts 30 days.

This version is not in the latest run; the versions below are.

Version OCaml 4.11 OCaml 4.14 OCaml 5.2 OCaml 5.4 OCaml 5.5
0.3.3 good good good good good
  • good Package successfully built
  • partial One of the dependencies failed to build
  • bad Package failed to build
  • n/a Package is not available in this environment
  • internal Internal failure