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authorJules Laplace <jules@okfoc.us>2014-07-09 18:17:16 -0400
committerJules Laplace <jules@okfoc.us>2014-07-09 18:17:16 -0400
commit0f9e0e60cc52cfbd052cf3b8925abadeda374c2f (patch)
tree9e4d7f14e34a5cc56b512441e9768bce64c253e8 /public/js/base64.js
parentc251396987dcffa38d421303162661b68443314f (diff)
static site
Diffstat (limited to 'public/js/base64.js')
-rw-r--r--public/js/base64.js113
1 files changed, 113 insertions, 0 deletions
diff --git a/public/js/base64.js b/public/js/base64.js
new file mode 100644
index 0000000..2530e71
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+++ b/public/js/base64.js
@@ -0,0 +1,113 @@
+/* Copyright (C) 1999 Masanao Izumo <iz@onicos.co.jp>
+ * Version: 1.0
+ * LastModified: Dec 25 1999
+ * This library is free. You can redistribute it and/or modify it.
+ */
+
+/*
+ * Interfaces:
+ * b64 = base64encode(data);
+ * data = base64decode(b64);
+ */
+
+(function() {
+
+var base64EncodeChars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+var base64DecodeChars = new Array(
+ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63,
+ 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -1, -1, -1,
+ -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
+ 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1,
+ -1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
+ 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1);
+
+function base64encode(str) {
+ var out, i, len;
+ var c1, c2, c3;
+
+ len = str.length;
+ i = 0;
+ out = "";
+ while(i < len) {
+ c1 = str.charCodeAt(i++) & 0xff;
+ if(i == len)
+ {
+ out += base64EncodeChars.charAt(c1 >> 2);
+ out += base64EncodeChars.charAt((c1 & 0x3) << 4);
+ out += "==";
+ break;
+ }
+ c2 = str.charCodeAt(i++);
+ if(i == len)
+ {
+ out += base64EncodeChars.charAt(c1 >> 2);
+ out += base64EncodeChars.charAt(((c1 & 0x3)<< 4) | ((c2 & 0xF0) >> 4));
+ out += base64EncodeChars.charAt((c2 & 0xF) << 2);
+ out += "=";
+ break;
+ }
+ c3 = str.charCodeAt(i++);
+ out += base64EncodeChars.charAt(c1 >> 2);
+ out += base64EncodeChars.charAt(((c1 & 0x3)<< 4) | ((c2 & 0xF0) >> 4));
+ out += base64EncodeChars.charAt(((c2 & 0xF) << 2) | ((c3 & 0xC0) >>6));
+ out += base64EncodeChars.charAt(c3 & 0x3F);
+ }
+ return out;
+}
+
+function base64decode(str) {
+ var c1, c2, c3, c4;
+ var i, len, out;
+
+ len = str.length;
+ i = 0;
+ out = "";
+ while(i < len) {
+ /* c1 */
+ do {
+ c1 = base64DecodeChars[str.charCodeAt(i++) & 0xff];
+ } while(i < len && c1 == -1);
+ if(c1 == -1)
+ break;
+
+ /* c2 */
+ do {
+ c2 = base64DecodeChars[str.charCodeAt(i++) & 0xff];
+ } while(i < len && c2 == -1);
+ if(c2 == -1)
+ break;
+
+ out += String.fromCharCode((c1 << 2) | ((c2 & 0x30) >> 4));
+
+ /* c3 */
+ do {
+ c3 = str.charCodeAt(i++) & 0xff;
+ if(c3 == 61)
+ return out;
+ c3 = base64DecodeChars[c3];
+ } while(i < len && c3 == -1);
+ if(c3 == -1)
+ break;
+
+ out += String.fromCharCode(((c2 & 0XF) << 4) | ((c3 & 0x3C) >> 2));
+
+ /* c4 */
+ do {
+ c4 = str.charCodeAt(i++) & 0xff;
+ if(c4 == 61)
+ return out;
+ c4 = base64DecodeChars[c4];
+ } while(i < len && c4 == -1);
+ if(c4 == -1)
+ break;
+ out += String.fromCharCode(((c3 & 0x03) << 6) | c4);
+ }
+ return out;
+}
+
+if (!window.btoa) window.btoa = base64encode;
+if (!window.atob) window.atob = base64decode;
+
+})();