1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/services/sync/tps/extensions/mozmill/resource/stdlib/withs.js Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,146 @@
1.4 +/*
1.5 + Copyright (c) 2006 Lawrence Oluyede <l.oluyede@gmail.com>
1.6 +
1.7 + Permission is hereby granted, free of charge, to any person obtaining a copy
1.8 + of this software and associated documentation files (the "Software"), to deal
1.9 + in the Software without restriction, including without limitation the rights
1.10 + to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
1.11 + copies of the Software, and to permit persons to whom the Software is
1.12 + furnished to do so, subject to the following conditions:
1.13 +
1.14 + The above copyright notice and this permission notice shall be included in all
1.15 + copies or substantial portions of the Software.
1.16 +
1.17 + THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
1.18 + IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
1.19 + FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
1.20 + AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
1.21 + LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
1.22 + OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
1.23 + SOFTWARE.
1.24 +*/
1.25 +
1.26 +/*
1.27 + startsWith(str, prefix[, start[, end]]) -> bool
1.28 +
1.29 + Return true if str ends with the specified prefix, false otherwise.
1.30 + With optional start, test str beginning at that position.
1.31 + With optional end, stop comparing str at that position.
1.32 + prefix can also be an array of strings to try.
1.33 +*/
1.34 +
1.35 +var EXPORTED_SYMBOLS = ['startsWith', 'endsWith'];
1.36 +
1.37 +function startsWith(str, prefix, start, end) {
1.38 + if (arguments.length < 2) {
1.39 + throw new TypeError('startsWith() requires at least 2 arguments');
1.40 + }
1.41 +
1.42 + // check if start and end are null/undefined or a 'number'
1.43 + if ((start == null) || (isNaN(new Number(start)))) {
1.44 + start = 0;
1.45 + }
1.46 + if ((end == null) || (isNaN(new Number(end)))) {
1.47 + end = Number.MAX_VALUE;
1.48 + }
1.49 +
1.50 + // if it's an array
1.51 + if (typeof prefix == "object") {
1.52 + for (var i = 0, j = prefix.length; i < j; i++) {
1.53 + var res = _stringTailMatch(str, prefix[i], start, end, true);
1.54 + if (res) {
1.55 + return true;
1.56 + }
1.57 + }
1.58 + return false;
1.59 + }
1.60 +
1.61 + return _stringTailMatch(str, prefix, start, end, true);
1.62 +}
1.63 +
1.64 +/*
1.65 + endsWith(str, suffix[, start[, end]]) -> bool
1.66 +
1.67 + Return true if str ends with the specified suffix, false otherwise.
1.68 + With optional start, test str beginning at that position.
1.69 + With optional end, stop comparing str at that position.
1.70 + suffix can also be an array of strings to try.
1.71 +*/
1.72 +function endsWith(str, suffix, start, end) {
1.73 + if (arguments.length < 2) {
1.74 + throw new TypeError('endsWith() requires at least 2 arguments');
1.75 + }
1.76 +
1.77 + // check if start and end are null/undefined or a 'number'
1.78 + if ((start == null) || (isNaN(new Number(start)))) {
1.79 + start = 0;
1.80 + }
1.81 + if ((end == null) || (isNaN(new Number(end)))) {
1.82 + end = Number.MAX_VALUE;
1.83 + }
1.84 +
1.85 + // if it's an array
1.86 + if (typeof suffix == "object") {
1.87 + for (var i = 0, j = suffix.length; i < j; i++) {
1.88 + var res = _stringTailMatch(str, suffix[i], start, end, false);
1.89 + if (res) {
1.90 + return true;
1.91 + }
1.92 + }
1.93 + return false;
1.94 + }
1.95 +
1.96 + return _stringTailMatch(str, suffix, start, end, false);
1.97 +}
1.98 +
1.99 +/*
1.100 + Matches the end (direction == false) or start (direction == true) of str
1.101 + against substr, using the start and end arguments. Returns false
1.102 + if not found and true if found.
1.103 +*/
1.104 +function _stringTailMatch(str, substr, start, end, fromStart) {
1.105 + var len = str.length;
1.106 + var slen = substr.length;
1.107 +
1.108 + var indices = _adjustIndices(start, end, len);
1.109 + start = indices[0]; end = indices[1]; len = indices[2];
1.110 +
1.111 + if (fromStart) {
1.112 + if (start + slen > len) {
1.113 + return false;
1.114 + }
1.115 + } else {
1.116 + if (end - start < slen || start > len) {
1.117 + return false;
1.118 + }
1.119 + if (end - slen > start) {
1.120 + start = end - slen;
1.121 + }
1.122 + }
1.123 +
1.124 + if (end - start >= slen) {
1.125 + return str.substr(start, slen) == substr;
1.126 + }
1.127 + return false;
1.128 +}
1.129 +
1.130 +function _adjustIndices(start, end, len)
1.131 +{
1.132 + if (end > len) {
1.133 + end = len;
1.134 + } else if (end < 0) {
1.135 + end += len;
1.136 + }
1.137 +
1.138 + if (end < 0) {
1.139 + end = 0;
1.140 + }
1.141 + if (start < 0) {
1.142 + start += len;
1.143 + }
1.144 + if (start < 0) {
1.145 + start = 0;
1.146 + }
1.147 +
1.148 + return [start, end, len];
1.149 +}
