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78 lines
2.7 KiB
JavaScript
78 lines
2.7 KiB
JavaScript
/*! Metric parser
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* Demo: http://jsfiddle.net/Mottie/abkNM/382/
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* Set the metric name in the header (defaults to "m|meter"), e.g.
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* <th data-metric-name="b|byte">HDD Size</th>
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* <th data-metric-name="m|meter">Distance</th>
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*/
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/*jshint jquery:true */
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;(function($){
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"use strict";
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var prefixes = {
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// "prefix" : [ base 10, base 2 ]
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// skipping IEEE 1541 defined prefixes: kibibyte, mebibyte, etc, for now.
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"Y|Yotta|yotta" : [ 1e24, Math.pow(1024, 8) ], // 1024^8
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"Z|Zetta|zetta" : [ 1e21, Math.pow(1024, 7) ], // 1024^7
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"E|Exa|exa" : [ 1e18, Math.pow(1024, 6) ], // 1024^6
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"P|Peta|peta" : [ 1e15, Math.pow(1024, 5) ], // 1024^5
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"T|Tera|tera" : [ 1e12, Math.pow(1024, 4) ], // 1024^4
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"G|Giga|giga" : [ 1e9, Math.pow(1024, 3) ], // 1024^3
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"M|Mega|mega" : [ 1e6, Math.pow(1024, 2) ], // 1024^2
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"k|Kilo|kilo" : [ 1e3, 1024 ], // 1024
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// prefixes below here are rarely, if ever, used in binary
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"h|hecto" : [ 1e2, 1e2 ],
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"da|deka" : [ 1e1, 1e1 ],
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"d|deci" : [ 1e-1, 1e-1 ],
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"c|centi" : [ 1e-2, 1e-2],
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"m|milli" : [ 1e-3, 1e-3 ],
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"µ|micro" : [ 1e-6, 1e-6 ],
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"n|nano" : [ 1e-9, 1e-9 ],
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"p|pico" : [ 1e-12, 1e-12 ],
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"f|femto" : [ 1e-15, 1e-15 ],
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"a|atto" : [ 1e-18, 1e-18 ],
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"z|zepto" : [ 1e-21, 1e-21 ],
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"y|yocto" : [ 1e-24, 1e-24 ]
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},
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// the \\d+ will not catch digits with spaces, commas or decimals; so use the value from n instead
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RegLong = "(\\d+)(\\s+)?([Zz]etta|[Ee]xa|[Pp]eta|[Tt]era|[Gg]iga|[Mm]ega|kilo|hecto|deka|deci|centi|milli|micro|nano|pico|femto|atto|zepto|yocto)(",
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RegAbbr = "(\\d+)(\\s+)?(Z|E|P|T|G|M|k|h|da|d|c|m|µ|n|p|f|a|z|y)(";
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$.tablesorter.addParser({
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id: 'metric',
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is: function() {
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return false;
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},
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format: function(s, table, cell, cellIndex) {
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var v = 'm|meter',
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b, t,
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// process number here to get a numerical format (us or eu)
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n = $.tablesorter.formatFloat(s.replace(/[^\w,. \-()]/g, ""), table),
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$t = table.config.$headerIndexed[cellIndex],
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m = $t.data('metric');
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if (!m) {
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// stored values
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t = ($t.attr('data-metric-name') || v).split('|');
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m = [ t[1] || t[0].substring(1), t[0] ];
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m[2] = new RegExp(RegLong + m[0] + "|" + m[1] + ")");
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m[3] = new RegExp(RegAbbr + m[1] + ")");
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$t.data('metric', m);
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}
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// find match to full name or abbreviation
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t = s.match(m[2]) || s.match(m[3]);
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if (t) {
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for (v in prefixes) {
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if (t[3].match(v)) {
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// exception when using binary prefix
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// change base for binary use
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b = /^[b|bit|byte|o|octet]/.test(t[4]) ? 1 : 0;
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return n * prefixes[v][b];
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}
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}
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}
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return n;
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},
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type: 'numeric'
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});
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})(jQuery);
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