| 1 |
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| 2 | !function(exports) {
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| 3 | "use strict";
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| 4 | var sep = exports.sep = "/"
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| 5 | exports.normalize = normalize
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| 6 | exports.relative = relative
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| 7 | exports.resolve = resolve
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| 8 |
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| 9 | function normalize(path) {
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| 10 | var c
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| 11 | , SLASH = 47
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| 12 | , DOT = 46
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| 13 | , res = path
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| 14 | , abs = res.charCodeAt(0) == SLASH
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| 15 | , len = res.length
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| 16 | , i = len
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| 17 | , cut = len
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| 18 | , up = 0
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| 19 | , last = SLASH
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| 20 |
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| 21 | for (; i > 0; ) {
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| 22 | c = res.charCodeAt(--i)
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| 23 | if (c === SLASH) {
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| 24 | if (cut === 0) {
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| 25 | cut = i
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| 26 | } else if (last !== SLASH && up > 0) {
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| 27 | up--
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| 28 | }
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| 29 | } else if (last === SLASH) {
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| 30 | if (c === DOT) {
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| 31 | if (i > 0) {
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| 32 | c = res.charCodeAt(--i)
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| 33 | if (c === DOT && (i === 0 || res.charCodeAt(i - 1) === SLASH)) {
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| 34 | last = SLASH
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| 35 | i--
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| 36 | up++
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| 37 | } else if (c !== SLASH) {
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| 38 | cut = 0
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| 39 | }
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| 40 | continue
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| 41 | } else {
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| 42 | break
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| 43 | }
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| 44 | }
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| 45 | if (up === 0 && cut > 0) {
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| 46 | if (len === cut) {
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| 47 | if (cut > i + 2) {
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| 48 | res = res.slice(0, res.charCodeAt(len - 1) === SLASH ? i + 2 : i + 1)
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| 49 | }
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| 50 | } else if (cut > i + 1) {
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| 51 | res = res.slice(0, i + 1) + res.slice(cut)
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| 52 | }
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| 53 | cut = 0
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| 54 | }
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| 55 | }
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| 56 | last = c
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| 57 | }
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| 58 | if (cut > 0 && i === 0) {
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| 59 | res = res.slice(abs ? cut : cut + 1)
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| 60 | }
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| 61 | return res
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| 62 | }
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| 63 |
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| 64 | function relative(from, to) {
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| 65 | from = normalize(clear(from))
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| 66 | to = normalize(clear(to))
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| 67 |
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| 68 | if (from === to) return ""
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| 69 |
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| 70 | from = from.split(sep)
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| 71 | to = to.split(sep)
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| 72 |
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| 73 | for (var common, i = common = from.length; i--; ) {
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| 74 | if (from[i] !== to[i]) common = i
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| 75 | from[i] = ".."
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| 76 | }
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| 77 |
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| 78 | return from.slice(common).concat(to.slice(common)).join(sep)
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| 79 | }
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| 80 |
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| 81 | function resolve() {
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| 82 | var args = arguments
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| 83 | , i = args.length
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| 84 | , out = []
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| 85 |
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| 86 | for (; i; ) {
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| 87 | if ((out[i--] = clear(args[i])).charAt(0) == "/") {
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| 88 | out.splice(0, i + 1)
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| 89 | i = 0
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| 90 | }
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| 91 | }
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| 92 | if (!out[0]) out[0] = process.cwd()
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| 93 |
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| 94 | return normalize(out.join(sep))
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| 95 | }
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| 96 |
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| 97 | function clear(path) {
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| 98 | if (typeof path != "string") {
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| 99 | throw new TypeError("Path must be a string. Received " + typeof path)
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| 100 | }
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| 101 | return path.replace(/\/+$/, "")
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| 102 | }
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| 103 | }(this)
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| 104 |
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| 105 |
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| 106 |
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