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191 lines
5.5 KiB
191 lines
5.5 KiB
'use strict' |
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module.exports = rfdc |
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function copyBuffer (cur) { |
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if (cur instanceof Buffer) { |
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return Buffer.from(cur) |
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} |
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return new cur.constructor(cur.buffer.slice(), cur.byteOffset, cur.length) |
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} |
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function rfdc (opts) { |
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opts = opts || {} |
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if (opts.circles) return rfdcCircles(opts) |
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return opts.proto ? cloneProto : clone |
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function cloneArray (a, fn) { |
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var keys = Object.keys(a) |
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var a2 = new Array(keys.length) |
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for (var i = 0; i < keys.length; i++) { |
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var k = keys[i] |
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var cur = a[k] |
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if (typeof cur !== 'object' || cur === null) { |
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a2[k] = cur |
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} else if (cur instanceof Date) { |
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a2[k] = new Date(cur) |
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} else if (ArrayBuffer.isView(cur)) { |
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a2[k] = copyBuffer(cur) |
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} else { |
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a2[k] = fn(cur) |
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} |
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} |
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return a2 |
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} |
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function clone (o) { |
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if (typeof o !== 'object' || o === null) return o |
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if (o instanceof Date) return new Date(o) |
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if (Array.isArray(o)) return cloneArray(o, clone) |
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if (o instanceof Map) return new Map(cloneArray(Array.from(o), clone)) |
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if (o instanceof Set) return new Set(cloneArray(Array.from(o), clone)) |
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var o2 = {} |
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for (var k in o) { |
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if (Object.hasOwnProperty.call(o, k) === false) continue |
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var cur = o[k] |
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if (typeof cur !== 'object' || cur === null) { |
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o2[k] = cur |
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} else if (cur instanceof Date) { |
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o2[k] = new Date(cur) |
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} else if (cur instanceof Map) { |
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o2[k] = new Map(cloneArray(Array.from(cur), clone)) |
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} else if (cur instanceof Set) { |
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o2[k] = new Set(cloneArray(Array.from(cur), clone)) |
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} else if (ArrayBuffer.isView(cur)) { |
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o2[k] = copyBuffer(cur) |
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} else { |
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o2[k] = clone(cur) |
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} |
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} |
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return o2 |
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} |
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function cloneProto (o) { |
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if (typeof o !== 'object' || o === null) return o |
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if (o instanceof Date) return new Date(o) |
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if (Array.isArray(o)) return cloneArray(o, cloneProto) |
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if (o instanceof Map) return new Map(cloneArray(Array.from(o), cloneProto)) |
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if (o instanceof Set) return new Set(cloneArray(Array.from(o), cloneProto)) |
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var o2 = {} |
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for (var k in o) { |
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var cur = o[k] |
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if (typeof cur !== 'object' || cur === null) { |
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o2[k] = cur |
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} else if (cur instanceof Date) { |
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o2[k] = new Date(cur) |
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} else if (cur instanceof Map) { |
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o2[k] = new Map(cloneArray(Array.from(cur), cloneProto)) |
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} else if (cur instanceof Set) { |
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o2[k] = new Set(cloneArray(Array.from(cur), cloneProto)) |
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} else if (ArrayBuffer.isView(cur)) { |
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o2[k] = copyBuffer(cur) |
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} else { |
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o2[k] = cloneProto(cur) |
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} |
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} |
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return o2 |
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} |
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} |
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function rfdcCircles (opts) { |
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var refs = [] |
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var refsNew = [] |
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return opts.proto ? cloneProto : clone |
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function cloneArray (a, fn) { |
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var keys = Object.keys(a) |
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var a2 = new Array(keys.length) |
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for (var i = 0; i < keys.length; i++) { |
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var k = keys[i] |
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var cur = a[k] |
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if (typeof cur !== 'object' || cur === null) { |
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a2[k] = cur |
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} else if (cur instanceof Date) { |
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a2[k] = new Date(cur) |
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} else if (ArrayBuffer.isView(cur)) { |
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a2[k] = copyBuffer(cur) |
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} else { |
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var index = refs.indexOf(cur) |
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if (index !== -1) { |
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a2[k] = refsNew[index] |
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} else { |
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a2[k] = fn(cur) |
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} |
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} |
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} |
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return a2 |
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} |
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function clone (o) { |
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if (typeof o !== 'object' || o === null) return o |
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if (o instanceof Date) return new Date(o) |
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if (Array.isArray(o)) return cloneArray(o, clone) |
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if (o instanceof Map) return new Map(cloneArray(Array.from(o), clone)) |
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if (o instanceof Set) return new Set(cloneArray(Array.from(o), clone)) |
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var o2 = {} |
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refs.push(o) |
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refsNew.push(o2) |
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for (var k in o) { |
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if (Object.hasOwnProperty.call(o, k) === false) continue |
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var cur = o[k] |
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if (typeof cur !== 'object' || cur === null) { |
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o2[k] = cur |
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} else if (cur instanceof Date) { |
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o2[k] = new Date(cur) |
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} else if (cur instanceof Map) { |
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o2[k] = new Map(cloneArray(Array.from(cur), clone)) |
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} else if (cur instanceof Set) { |
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o2[k] = new Set(cloneArray(Array.from(cur), clone)) |
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} else if (ArrayBuffer.isView(cur)) { |
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o2[k] = copyBuffer(cur) |
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} else { |
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var i = refs.indexOf(cur) |
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if (i !== -1) { |
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o2[k] = refsNew[i] |
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} else { |
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o2[k] = clone(cur) |
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} |
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} |
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} |
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refs.pop() |
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refsNew.pop() |
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return o2 |
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} |
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function cloneProto (o) { |
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if (typeof o !== 'object' || o === null) return o |
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if (o instanceof Date) return new Date(o) |
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if (Array.isArray(o)) return cloneArray(o, cloneProto) |
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if (o instanceof Map) return new Map(cloneArray(Array.from(o), cloneProto)) |
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if (o instanceof Set) return new Set(cloneArray(Array.from(o), cloneProto)) |
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var o2 = {} |
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refs.push(o) |
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refsNew.push(o2) |
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for (var k in o) { |
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var cur = o[k] |
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if (typeof cur !== 'object' || cur === null) { |
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o2[k] = cur |
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} else if (cur instanceof Date) { |
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o2[k] = new Date(cur) |
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} else if (cur instanceof Map) { |
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o2[k] = new Map(cloneArray(Array.from(cur), cloneProto)) |
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} else if (cur instanceof Set) { |
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o2[k] = new Set(cloneArray(Array.from(cur), cloneProto)) |
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} else if (ArrayBuffer.isView(cur)) { |
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o2[k] = copyBuffer(cur) |
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} else { |
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var i = refs.indexOf(cur) |
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if (i !== -1) { |
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o2[k] = refsNew[i] |
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} else { |
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o2[k] = cloneProto(cur) |
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} |
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} |
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} |
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refs.pop() |
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refsNew.pop() |
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return o2 |
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} |
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}
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