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'use strict';
module.exports = function strnatcmp(a, b) {
// discuss at: http://locutus.io/php/strnatcmp/
// original by: Martijn Wieringa
// improved by: Michael White (http://getsprink.com)
// improved by: Jack
// bugfixed by: Onno Marsman (https://twitter.com/onnomarsman)
// reimplemented by: Rafał Kukawski
// example 1: strnatcmp('abc', 'abc')
// returns 1: 0
// example 2: strnatcmp('a', 'b')
// returns 2: -1
// example 3: strnatcmp('10', '1')
// returns 3: 1
// example 4: strnatcmp('0000abc', '0abc')
// returns 4: 0
// example 5: strnatcmp('1239', '12345')
// returns 5: -1
// example 6: strnatcmp('t01239', 't012345')
// returns 6: 1
// example 7: strnatcmp('0A', '5N')
// returns 7: -1
var _phpCastString = require('../_helpers/_phpCastString');
var leadingZeros = /^0+(?=\d)/;
var whitespace = /^\s/;
var digit = /^\d/;
if (arguments.length !== 2) {
return null;
}
a = _phpCastString(a);
b = _phpCastString(b);
if (!a.length || !b.length) {
return a.length - b.length;
}
var i = 0;
var j = 0;
a = a.replace(leadingZeros, '');
b = b.replace(leadingZeros, '');
while (i < a.length && j < b.length) {
// skip consecutive whitespace
while (whitespace.test(a.charAt(i))) {
i++;
}while (whitespace.test(b.charAt(j))) {
j++;
}var ac = a.charAt(i);
var bc = b.charAt(j);
var aIsDigit = digit.test(ac);
var bIsDigit = digit.test(bc);
if (aIsDigit && bIsDigit) {
var bias = 0;
var fractional = ac === '0' || bc === '0';
do {
if (!aIsDigit) {
return -1;
} else if (!bIsDigit) {
return 1;
} else if (ac < bc) {
if (!bias) {
bias = -1;
}
if (fractional) {
return -1;
}
} else if (ac > bc) {
if (!bias) {
bias = 1;
}
if (fractional) {
return 1;
}
}
ac = a.charAt(++i);
bc = b.charAt(++j);
aIsDigit = digit.test(ac);
bIsDigit = digit.test(bc);
} while (aIsDigit || bIsDigit);
if (!fractional && bias) {
return bias;
}
continue;
}
if (!ac || !bc) {
continue;
} else if (ac < bc) {
return -1;
} else if (ac > bc) {
return 1;
}
i++;
j++;
}
var iBeforeStrEnd = i < a.length;
var jBeforeStrEnd = j < b.length;
// Check which string ended first
// return -1 if a, 1 if b, 0 otherwise
return (iBeforeStrEnd > jBeforeStrEnd) - (iBeforeStrEnd < jBeforeStrEnd);
};
//# sourceMappingURL=strnatcmp.js.map
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