var alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; function encode_b64(input) { var out = ""; var i = 0; var len = input.length; while (i < len) { var c1 = input.charCodeAt(i++) & 255; if (i === len) { out += alphabet.charAt(c1 >> 2); out += alphabet.charAt((c1 & 3) << 4); out += "=="; break; } var c2 = input.charCodeAt(i++) & 255; if (i === len) { out += alphabet.charAt(c1 >> 2); out += alphabet.charAt(((c1 & 3) << 4) | (c2 >> 4)); out += alphabet.charAt((c2 & 15) << 2); out += "="; break; } var c3 = input.charCodeAt(i++) & 255; out += alphabet.charAt(c1 >> 2); out += alphabet.charAt(((c1 & 3) << 4) | (c2 >> 4)); out += alphabet.charAt(((c2 & 15) << 2) | (c3 >> 6)); out += alphabet.charAt(c3 & 63); } return out; } function value_of(ch) { var idx = alphabet.indexOf(ch); return idx; } function decode_b64(input) { var clean = ""; var k = 0; while (k < input.length) { var ch = input.charAt(k++); if (ch === "=") continue; if (value_of(ch) >= 0) clean += ch; } var out = ""; var i = 0; while (i < clean.length) { var s1 = value_of(clean.charAt(i++)); var s2 = i < clean.length ? value_of(clean.charAt(i++)) : -1; var s3 = i < clean.length ? value_of(clean.charAt(i++)) : -1; var s4 = i < clean.length ? value_of(clean.charAt(i++)) : -1; if (s2 < 0) break; var b1 = (s1 << 2) | (s2 >> 4); out += String.fromCharCode(b1 & 255); if (s3 < 0) break; var b2 = ((s2 & 15) << 4) | (s3 >> 2); out += String.fromCharCode(b2 & 255); if (s4 < 0) break; var b3 = ((s3 & 3) << 6) | s4; out += String.fromCharCode(b3 & 255); } return out; } var args = exceed.args; if (args.length === 0) { exceed.reply("usage: " + exceed.prefix + "base64 | " + exceed.prefix + "base64 decode "); exceed.stop(); } var mode = exceed.str.lower(args[0]); if (mode === "decode") { var rest = ""; for (var j = 1; j < args.length; j++) { rest += (j > 1 ? " " : "") + args[j]; } rest = exceed.str.trim(rest); if (rest.length === 0) { exceed.reply("usage: " + exceed.prefix + "base64 decode "); exceed.stop(); } exceed.reply("decoded: " + exceed.fmt.code(decode_b64(rest))); } else { var text = exceed.str.trim(exceed.argString); if (text.length === 0) { exceed.reply("usage: " + exceed.prefix + "base64 "); exceed.stop(); } exceed.reply("encoded: " + exceed.fmt.code(encode_b64(text))); }

/base64