artdaq_node_server  v1_00_08
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_unicodeSize.js
1 
2 var rsAstralRange = '\\ud800-\\udfff',
3  rsComboMarksRange = '\\u0300-\\u036f',
4  reComboHalfMarksRange = '\\ufe20-\\ufe2f',
5  rsComboSymbolsRange = '\\u20d0-\\u20ff',
6  rsComboRange = rsComboMarksRange + reComboHalfMarksRange + rsComboSymbolsRange,
7  rsVarRange = '\\ufe0e\\ufe0f';
8 
10 var rsAstral = '[' + rsAstralRange + ']',
11  rsCombo = '[' + rsComboRange + ']',
12  rsFitz = '\\ud83c[\\udffb-\\udfff]',
13  rsModifier = '(?:' + rsCombo + '|' + rsFitz + ')',
14  rsNonAstral = '[^' + rsAstralRange + ']',
15  rsRegional = '(?:\\ud83c[\\udde6-\\uddff]){2}',
16  rsSurrPair = '[\\ud800-\\udbff][\\udc00-\\udfff]',
17  rsZWJ = '\\u200d';
18 
20 var reOptMod = rsModifier + '?',
21  rsOptVar = '[' + rsVarRange + ']?',
22  rsOptJoin = '(?:' + rsZWJ + '(?:' + [rsNonAstral, rsRegional, rsSurrPair].join('|') + ')' + rsOptVar + reOptMod + ')*',
23  rsSeq = rsOptVar + reOptMod + rsOptJoin,
24  rsSymbol = '(?:' + [rsNonAstral + rsCombo + '?', rsCombo, rsRegional, rsSurrPair, rsAstral].join('|') + ')';
25 
27 var reUnicode = RegExp(rsFitz + '(?=' + rsFitz + ')|' + rsSymbol + rsSeq, 'g');
28 
36 function unicodeSize(string) {
37  var result = reUnicode.lastIndex = 0;
38  while (reUnicode.test(string)) {
39  ++result;
40  }
41  return result;
42 }
43 
44 module.exports = unicodeSize;