initial commit for GitHub

core/codecString.js

@@ -0,0 +1,39 @@
+/** @fileOverview Bit array codec implementations.
+ *
+ * @author Emily Stark
+ * @author Mike Hamburg
+ * @author Dan Boneh
+ */
+ 
+/** @namespace UTF-8 strings */
+sjcl.codec.utf8String = {
+  /** Convert from a bitArray to a UTF-8 string. */
+  fromBits: function (arr) {
+    var out = "", bl = sjcl.bitArray.bitLength(arr), i, tmp;
+    for (i=0; i<bl/8; i++) {
+      if ((i&3) === 0) {
+        tmp = arr[i/4];
+      }
+      out += String.fromCharCode(tmp >>> 24);
+      tmp <<= 8;
+    }
+    return decodeURIComponent(escape(out));
+  },
+  
+  /** Convert from a UTF-8 string to a bitArray. */
+  toBits: function (str) {
+    str = unescape(encodeURIComponent(str));
+    var out = [], i, tmp=0;
+    for (i=0; i<str.length; i++) {
+      tmp = tmp << 8 | str.charCodeAt(i);
+      if ((i&3) === 3) {
+        out.push(tmp);
+        tmp = 0;
+      }
+    }
+    if (i&3) {
+      out.push(sjcl.bitArray.partial(8*(i&3), tmp));
+    }
+    return out;
+  }
+};