javascript ranges calculate li

JavaScript区间计算库 JavaScript ranges calculate library

可参照test/test.js中的测试代码

Refer to test code in test/test.js

标准用法/Standard usage

var Ranges = require('range-calculator'); var ranges = new Ranges(1,10); ranges.add([21, 30]); // ranges.ranges = [ [1,10], [21,30] ] ranges.isConflict([11, 20]); // false ranges.isConflict([25, 45]); // true ranges.add([11, 20]); // ranges.ranges = [ [1,30] ] ranges.sub([1,5]); // ranges.ranges = [ [6,30] ] ranges.sub([15,25]); // ranges.ranges = [ [6,14], [26,30] ] ranges.isContain(12); // true

用于IPv4冲突判断/Use as IPv4 conflict detect

var ipToNumber = function(dot){ var d = dot.split('.'); return ((((((+d[0])*256)+(+d[1]))*256)+(+d[2]))*256)+(+d[3]); }; var ranges = new Ranges(ipToNumber('192.168.1.100'), ipToNumber('192.168.1.199')); ranges.isConflict([ipToNumber('192.168.0.1'), ipToNumber('192.168.2.1')]); // true ranges.isContain(ipToNumber('192.168.1.125')); // true

用于IPv6冲突判断（字串对比）Use as IPv6 conflict detect(string range)

// [JS] Expand Abbreviated IPv6 Addresses // by Christopher Miller // http://forrst.com/posts/JS_Expand_Abbreviated_IPv6_Addresses-1OR // Modified to work with embedded IPv4 addresses // https://gist.github.com/Mottie/7018157 function expand(address) { var fullAddress = ""; var expandedAddress = ""; var validGroupCount = 8; var validGroupSize = 4; if(address.indexOf("::") == -1) // All eight groups are present. fullAddress = address; else // Consecutive groups of zeroes have been collapsed with "::". { var sides = address.split("::"); var groupsPresent = 0; for(var i=0; i<sides.length; i++) { groupsPresent += sides[i].split(":").length; } fullAddress += sides[0] + ":"; for(var i=0; i<validGroupCount-groupsPresent; i++) { fullAddress += "0000:"; } fullAddress += sides[1]; } var groups = fullAddress.split(":"); for(var i=0; i<validGroupCount; i++) { while(groups[i].length < validGroupSize) { groups[i] = "0" + groups[i]; } expandedAddress += (i!=validGroupCount-1) ? groups[i] + ":" : groups[i]; } return expandedAddress; } var ranges = new Ranges(expand('fe80::1:fdd7:b312:1'), expand('fe80::bc5e:fdd7:b312:cd02')); ranges.isConflict([expand('fe80::1'), expand('fe80::1de6:fa0a:892d:bf77')]); // true ranges.isContain(expand('fe80::1de6:fa0a:892d:bf77')); // true

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