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Diffstat (limited to 'node_modules/locutus/php/strings/substr.js')
| -rw-r--r-- | node_modules/locutus/php/strings/substr.js | 124 |
1 files changed, 0 insertions, 124 deletions
diff --git a/node_modules/locutus/php/strings/substr.js b/node_modules/locutus/php/strings/substr.js deleted file mode 100644 index 3498296..0000000 --- a/node_modules/locutus/php/strings/substr.js +++ /dev/null @@ -1,124 +0,0 @@ -'use strict'; - -module.exports = function substr(str, start, len) { - // discuss at: http://locutus.io/php/substr/ - // original by: Martijn Wieringa - // bugfixed by: T.Wild - // improved by: Onno Marsman (https://twitter.com/onnomarsman) - // improved by: Brett Zamir (http://brett-zamir.me) - // revised by: Theriault (https://github.com/Theriault) - // note 1: Handles rare Unicode characters if 'unicode.semantics' ini (PHP6) is set to 'on' - // example 1: substr('abcdef', 0, -1) - // returns 1: 'abcde' - // example 2: substr(2, 0, -6) - // returns 2: false - // example 3: ini_set('unicode.semantics', 'on') - // example 3: substr('a\uD801\uDC00', 0, -1) - // returns 3: 'a' - // example 4: ini_set('unicode.semantics', 'on') - // example 4: substr('a\uD801\uDC00', 0, 2) - // returns 4: 'a\uD801\uDC00' - // example 5: ini_set('unicode.semantics', 'on') - // example 5: substr('a\uD801\uDC00', -1, 1) - // returns 5: '\uD801\uDC00' - // example 6: ini_set('unicode.semantics', 'on') - // example 6: substr('a\uD801\uDC00z\uD801\uDC00', -3, 2) - // returns 6: '\uD801\uDC00z' - // example 7: ini_set('unicode.semantics', 'on') - // example 7: substr('a\uD801\uDC00z\uD801\uDC00', -3, -1) - // returns 7: '\uD801\uDC00z' - // test: skip-3 skip-4 skip-5 skip-6 skip-7 - - str += ''; - var end = str.length; - - var iniVal = (typeof require !== 'undefined' ? require('../info/ini_get')('unicode.emantics') : undefined) || 'off'; - - if (iniVal === 'off') { - // assumes there are no non-BMP characters; - // if there may be such characters, then it is best to turn it on (critical in true XHTML/XML) - if (start < 0) { - start += end; - } - if (typeof len !== 'undefined') { - if (len < 0) { - end = len + end; - } else { - end = len + start; - } - } - - // PHP returns false if start does not fall within the string. - // PHP returns false if the calculated end comes before the calculated start. - // PHP returns an empty string if start and end are the same. - // Otherwise, PHP returns the portion of the string from start to end. - if (start >= str.length || start < 0 || start > end) { - return false; - } - - return str.slice(start, end); - } - - // Full-blown Unicode including non-Basic-Multilingual-Plane characters - var i = 0; - var allBMP = true; - var es = 0; - var el = 0; - var se = 0; - var ret = ''; - - for (i = 0; i < str.length; i++) { - if (/[\uD800-\uDBFF]/.test(str.charAt(i)) && /[\uDC00-\uDFFF]/.test(str.charAt(i + 1))) { - allBMP = false; - break; - } - } - - if (!allBMP) { - if (start < 0) { - for (i = end - 1, es = start += end; i >= es; i--) { - if (/[\uDC00-\uDFFF]/.test(str.charAt(i)) && /[\uD800-\uDBFF]/.test(str.charAt(i - 1))) { - start--; - es--; - } - } - } else { - var surrogatePairs = /[\uD800-\uDBFF][\uDC00-\uDFFF]/g; - while (surrogatePairs.exec(str) !== null) { - var li = surrogatePairs.lastIndex; - if (li - 2 < start) { - start++; - } else { - break; - } - } - } - - if (start >= end || start < 0) { - return false; - } - if (len < 0) { - for (i = end - 1, el = end += len; i >= el; i--) { - if (/[\uDC00-\uDFFF]/.test(str.charAt(i)) && /[\uD800-\uDBFF]/.test(str.charAt(i - 1))) { - end--; - el--; - } - } - if (start > end) { - return false; - } - return str.slice(start, end); - } else { - se = start + len; - for (i = start; i < se; i++) { - ret += str.charAt(i); - if (/[\uD800-\uDBFF]/.test(str.charAt(i)) && /[\uDC00-\uDFFF]/.test(str.charAt(i + 1))) { - // Go one further, since one of the "characters" is part of a surrogate pair - se++; - } - } - return ret; - } - } -}; -//# sourceMappingURL=substr.js.map
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