55 lines
1.4 KiB
JavaScript
55 lines
1.4 KiB
JavaScript
'use strict';
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module.exports = {
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wrap: wrapRange,
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limit: limitRange,
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validate: validateRange,
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test: testRange,
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curry: curry,
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name: name
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};
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function wrapRange(min, max, value) {
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var maxLessMin = max - min;
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return ((value - min) % maxLessMin + maxLessMin) % maxLessMin + min;
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}
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function limitRange(min, max, value) {
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return Math.max(min, Math.min(max, value));
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}
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function validateRange(min, max, value, minExclusive, maxExclusive) {
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if (!testRange(min, max, value, minExclusive, maxExclusive)) {
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throw new Error(value + ' is outside of range [' + min + ',' + max + ')');
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}
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return value;
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}
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function testRange(min, max, value, minExclusive, maxExclusive) {
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return !(
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value < min ||
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value > max ||
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(maxExclusive && (value === max)) ||
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(minExclusive && (value === min))
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);
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}
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function name(min, max, minExcl, maxExcl) {
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return (minExcl ? '(' : '[') + min + ',' + max + (maxExcl ? ')' : ']');
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}
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function curry(min, max, minExclusive, maxExclusive) {
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var boundNameFn = name.bind(null, min, max, minExclusive, maxExclusive);
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return {
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wrap: wrapRange.bind(null, min, max),
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limit: limitRange.bind(null, min, max),
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validate: function(value) {
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return validateRange(min, max, value, minExclusive, maxExclusive);
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},
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test: function(value) {
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return testRange(min, max, value, minExclusive, maxExclusive);
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},
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toString: boundNameFn,
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name: boundNameFn
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};
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}
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