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