1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
|
{-# LANGUAGE CPP, MagicHash, Rank2Types #-}
-- |
-- Module : Data.Double.Conversion.Text
-- Copyright : (c) 2011 MailRank, Inc.
--
-- License : BSD-style
-- Maintainer : bos@serpentine.com
-- Stability : experimental
-- Portability : GHC
--
-- This module left now only for compatibility and should not be used
-- in new projects.
-- Please, use Convertable type class from Data.Double.Conversion.Convertable
--
-- It is espesially recommended to convert a large amount of numbers via text builder
-- using methods of Convertable type class. It is about 10-15x faster.
--
-- Fast, efficient support for converting between double precision
-- floating point values and text.
--
-- These functions are about 30 times faster than the default 'show'
-- implementation for the 'Double' type.
module Data.Double.Conversion.Text
(
toExponential
, toFixed
, toPrecision
, toShortest
) where
import qualified Data.Double.Conversion.Convertable
import Data.Text.Internal (Text)
-- | Compute a representation in exponential format with the requested
-- number of digits after the decimal point. The last emitted digit is
-- rounded. If -1 digits are requested, then the shortest exponential
-- representation is computed.
toExponential :: Int -> Double -> Text
toExponential = Data.Double.Conversion.Convertable.toExponential
-- | Compute a decimal representation with a fixed number of digits
-- after the decimal point. The last emitted digit is rounded.
toFixed :: Int -> Double -> Text
toFixed = Data.Double.Conversion.Convertable.toFixed
-- | Compute the shortest string of digits that correctly represent
-- the input number.
toShortest :: Double -> Text
toShortest = Data.Double.Conversion.Convertable.toShortest
-- | Compute @precision@ leading digits of the given value either in
-- exponential or decimal format. The last computed digit is rounded.
toPrecision :: Int -> Double -> Text
toPrecision = Data.Double.Conversion.Convertable.toPrecision
|
