Gecko [ c.stage.kornherr.net ]

Name	Size	Permission	Date
binary.js	2.84 KB	-rw-r--r--	2022-10-26 12:30
bool.js	971 B	-rw-r--r--	2022-10-26 12:30
float.js	2.41 KB	-rw-r--r--	2022-10-26 12:30
int.js	3.6 KB	-rw-r--r--	2022-10-26 12:30
map.js	190 B	-rw-r--r--	2022-10-26 12:30
merge.js	230 B	-rw-r--r--	2022-10-26 12:30
null.js	808 B	-rw-r--r--	2022-10-26 12:30
omap.js	1023 B	-rw-r--r--	2022-10-26 12:30
pairs.js	1.06 KB	-rw-r--r--	2022-10-26 12:30
seq.js	191 B	-rw-r--r--	2022-10-26 12:30
set.js	547 B	-rw-r--r--	2022-10-26 12:30
str.js	189 B	-rw-r--r--	2022-10-26 12:30
timestamp.js	2.51 KB	-rw-r--r--	2022-10-26 12:30

Rename

'use strict';

var common = require('../common');
var Type   = require('../type');

var YAML_FLOAT_PATTERN = new RegExp(
  // 2.5e4, 2.5 and integers
  '^(?:[-+]?(?:[0-9][0-9_]*)(?:\\.[0-9_]*)?(?:[eE][-+]?[0-9]+)?' +
  // .2e4, .2
  // special case, seems not from spec
  '|\\.[0-9_]+(?:[eE][-+]?[0-9]+)?' +
  // .inf
  '|[-+]?\\.(?:inf|Inf|INF)' +
  // .nan
  '|\\.(?:nan|NaN|NAN))$');

function resolveYamlFloat(data) {
  if (data === null) return false;

if (!YAML_FLOAT_PATTERN.test(data) ||
      // Quick hack to not allow integers end with `_`
      // Probably should update regexp & check speed
      data[data.length - 1] === '_') {
    return false;
  }

return true;
}

function constructYamlFloat(data) {
  var value, sign;

value  = data.replace(/_/g, '').toLowerCase();
  sign   = value[0] === '-' ? -1 : 1;

if ('+-'.indexOf(value[0]) >= 0) {
    value = value.slice(1);
  }

if (value === '.inf') {
    return (sign === 1) ? Number.POSITIVE_INFINITY : Number.NEGATIVE_INFINITY;

} else if (value === '.nan') {
    return NaN;
  }
  return sign * parseFloat(value, 10);
}

var SCIENTIFIC_WITHOUT_DOT = /^[-+]?[0-9]+e/;

function representYamlFloat(object, style) {
  var res;

if (isNaN(object)) {
    switch (style) {
      case 'lowercase': return '.nan';
      case 'uppercase': return '.NAN';
      case 'camelcase': return '.NaN';
    }
  } else if (Number.POSITIVE_INFINITY === object) {
    switch (style) {
      case 'lowercase': return '.inf';
      case 'uppercase': return '.INF';
      case 'camelcase': return '.Inf';
    }
  } else if (Number.NEGATIVE_INFINITY === object) {
    switch (style) {
      case 'lowercase': return '-.inf';
      case 'uppercase': return '-.INF';
      case 'camelcase': return '-.Inf';
    }
  } else if (common.isNegativeZero(object)) {
    return '-0.0';
  }

res = object.toString(10);

// JS stringifier can build scientific format without dots: 5e-100,
  // while YAML requres dot: 5.e-100. Fix it with simple hack

return SCIENTIFIC_WITHOUT_DOT.test(res) ? res.replace('e', '.e') : res;
}

function isFloat(object) {
  return (Object.prototype.toString.call(object) === '[object Number]') &&
         (object % 1 !== 0 || common.isNegativeZero(object));
}

module.exports = new Type('tag:yaml.org,2002:float', {
  kind: 'scalar',
  resolve: resolveYamlFloat,
  construct: constructYamlFloat,
  predicate: isFloat,
  represent: representYamlFloat,
  defaultStyle: 'lowercase'
});