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= function addcslashes (str, charlist) {\n // discuss at: http://locutus.io/php/addcslashes/\n // original by: Brett Zamir (http://brett-zamir.me)\n // note 1: We show double backslashes in the return value example\n // note 1: code below because a JavaScript string will not\n // note 1: render them as backslashes otherwise\n // example 1: addcslashes('foo[ ]', 'A..z'); // Escape all ASCII within capital A to lower z range, including square brackets\n // returns 1: \"\\\\f\\\\o\\\\o\\\\[ \\\\]\"\n // example 2: addcslashes(\"zoo['.']\", 'z..A'); // Only escape z, period, and A here since not a lower-to-higher range\n // returns 2: \"\\\\zoo['\\\\.']\"\n // _example 3: addcslashes(\"@a\\u0000\\u0010\\u00A9\", \"\\0..\\37!@\\177..\\377\"); // Escape as octals those specified and less than 32 (0x20) or greater than 126 (0x7E), but not otherwise\n // _returns 3: '\\\\@a\\\\000\\\\020\\\\302\\\\251'\n // _example 4: addcslashes(\"\\u0020\\u007E\", \"\\40..\\175\"); // Those between 32 (0x20 or 040) and 126 (0x7E or 0176) decimal value will be backslashed if specified (not octalized)\n // _returns 4: '\\\\ ~'\n // _example 5: addcslashes(\"\\r\\u0007\\n\", '\\0..\\37'); // Recognize C escape sequences if specified\n // _returns 5: \"\\\\r\\\\a\\\\n\"\n // _example 6: addcslashes(\"\\r\\u0007\\n\", '\\0'); // Do not recognize C escape sequences if not specified\n // _returns 6: \"\\r\\u0007\\n\"\n\n var target = ''\n var chrs = []\n var i = 0\n var j = 0\n var c = ''\n var next = ''\n var rangeBegin = ''\n var rangeEnd = ''\n var chr = ''\n var begin = 0\n var end = 0\n var octalLength = 0\n var postOctalPos = 0\n var cca = 0\n var escHexGrp = []\n var encoded = ''\n var percentHex = /%([\\dA-Fa-f]+)/g\n\n var _pad = function (n, c) {\n if ((n = n + '').length < c) {\n return new Array(++c - n.length).join('0') + n\n }\n return n\n }\n\n for (i = 0; i < charlist.length; i++) {\n c = charlist.charAt(i)\n next = charlist.charAt(i + 1)\n if (c === '\\\\' && next && (/\\d/).test(next)) {\n // Octal\n rangeBegin = charlist.slice(i + 1).match(/^\\d+/)[0]\n octalLength = rangeBegin.length\n postOctalPos = i + octalLength + 1\n if (charlist.charAt(postOctalPos) + charlist.charAt(postOctalPos + 1) === '..') {\n // Octal begins range\n begin = rangeBegin.charCodeAt(0)\n if ((/\\\\\\d/).test(charlist.charAt(postOctalPos + 2) + charlist.charAt(postOctalPos + 3))) {\n // Range ends with octal\n rangeEnd = charlist.slice(postOctalPos + 3).match(/^\\d+/)[0]\n // Skip range end backslash\n i += 1\n } else if (charlist.charAt(postOctalPos + 2)) {\n // Range ends with character\n rangeEnd = charlist.charAt(postOctalPos + 2)\n } else {\n throw new Error('Range with no end point')\n }\n end = rangeEnd.charCodeAt(0)\n if (end > begin) {\n // Treat as a range\n for (j = begin; j <= end; j++) {\n chrs.push(String.fromCharCode(j))\n }\n } else {\n // Supposed to treat period, begin and end as individual characters only, not a range\n chrs.push('.', rangeBegin, rangeEnd)\n }\n // Skip dots and range end (already skipped range end backslash if present)\n i += rangeEnd.length + 2\n } else {\n // Octal is by itself\n chr = String.fromCharCode(parseInt(rangeBegin, 8))\n chrs.push(chr)\n }\n // Skip range begin\n i += octalLength\n } else if (next + charlist.charAt(i + 2) === '..') {\n // Character begins range\n rangeBegin = c\n begin = rangeBegin.charCodeAt(0)\n if ((/\\\\\\d/).test(charlist.charAt(i + 3) + charlist.charAt(i + 4))) {\n // Range ends with octal\n rangeEnd = charlist.slice(i + 4).match(/^\\d+/)[0]\n // Skip range end backslash\n i += 1\n } else if (charlist.charAt(i + 3)) {\n // Range ends with character\n rangeEnd = charlist.charAt(i + 3)\n } else {\n throw new Error('Range with no end point')\n }\n end = rangeEnd.charCodeAt(0)\n if (end > begin) {\n // Treat as a range\n for (j = begin; j <= end; j++) {\n chrs.push(String.fromCharCode(j))\n }\n } else {\n // Supposed to treat period, begin and end as individual characters only, not a range\n chrs.push('.', rangeBegin, rangeEnd)\n }\n // Skip dots and range end (already skipped range end backslash if present)\n i += rangeEnd.length + 2\n } else {\n // Character is by itself\n chrs.push(c)\n }\n }\n\n for (i = 0; i < str.length; i++) {\n c = str.charAt(i)\n if (chrs.indexOf(c) !== -1) {\n target += '\\\\'\n cca = c.charCodeAt(0)\n if (cca < 32 || cca > 126) {\n // Needs special escaping\n switch (c) {\n case '\\n':\n target += 'n'\n break\n case '\\t':\n target += 't'\n break\n case '\\u000D':\n target += 'r'\n break\n case '\\u0007':\n target += 'a'\n break\n case '\\v':\n target += 'v'\n break\n case '\\b':\n target += 'b'\n break\n case '\\f':\n target += 'f'\n break\n default:\n // target += _pad(cca.toString(8), 3);break; // Sufficient for UTF-16\n encoded = encodeURIComponent(c)\n\n // 3-length-padded UTF-8 octets\n if ((escHexGrp = percentHex.exec(encoded)) !== null) {\n // already added a slash above:\n target += _pad(parseInt(escHexGrp[1], 16).toString(8), 3)\n }\n while ((escHexGrp = percentHex.exec(encoded)) !== null) {\n target += '\\\\' + _pad(parseInt(escHexGrp[1], 16).toString(8), 3)\n }\n break\n }\n } else {\n // Perform regular backslashed escaping\n target += c\n }\n } else {\n // Just add the character unescaped\n target += c\n }\n }\n\n return target\n}\n"]}
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