0.2.0 - Mid migration

web/node_modules/lz-string/reference/lz-string-1.0.2.js

@@ -0,0 +1,204 @@
+// Copyright © 2013 Pieroxy <pieroxy@pieroxy.net>
+// This work is free. You can redistribute it and/or modify it
+// under the terms of the WTFPL, Version 2
+// For more information see LICENSE.txt or http://www.wtfpl.net/
+//
+// LZ-based compression algorithm, version 1.0.2-rc1
+var LZString = {
+
+  writeBit : function(value, data) {
+    data.val = (data.val << 1) | value;
+    if (data.position == 15) {
+      data.position = 0;
+      data.string += String.fromCharCode(data.val);
+      data.val = 0;
+    } else {
+      data.position++;
+    }
+  },
+  
+  writeBits : function(numBits, value, data) {
+    if (typeof(value)=="string")
+      value = value.charCodeAt(0);
+    for (var i=0 ; i<numBits ; i++) {
+      this.writeBit(value&1, data);
+      value = value >> 1;
+    }
+  },
+  
+  produceW : function (context) {
+    if (Object.prototype.hasOwnProperty.call(context.dictionaryToCreate,context.w)) {
+      if (context.w.charCodeAt(0)<256) {
+        this.writeBits(context.numBits, 0, context.data);
+        this.writeBits(8, context.w, context.data);
+      } else {
+        this.writeBits(context.numBits, 1, context.data);
+        this.writeBits(16, context.w, context.data);
+      }
+      this.decrementEnlargeIn(context);
+      delete context.dictionaryToCreate[context.w];
+    } else {
+      this.writeBits(context.numBits, context.dictionary[context.w], context.data);
+    }
+    this.decrementEnlargeIn(context);
+  },
+  
+  decrementEnlargeIn : function(context) {
+    context.enlargeIn--;
+    if (context.enlargeIn == 0) {
+      context.enlargeIn = Math.pow(2, context.numBits);
+      context.numBits++;
+    }
+  },
+  
+  compress: function (uncompressed) {
+    var context = {
+      dictionary: {},
+      dictionaryToCreate: {},
+      c:"",
+      wc:"",
+      w:"",
+      enlargeIn: 2, // Compensate for the first entry which should not count
+      dictSize: 3,
+      numBits: 2,
+      result: "",
+      data: {string:"", val:0, position:0}
+    }, i;
+    
+    for (i = 0; i < uncompressed.length; i += 1) {
+      context.c = uncompressed.charAt(i);
+      if (!Object.prototype.hasOwnProperty.call(context.dictionary,context.c)) {
+        context.dictionary[context.c] = context.dictSize++;
+        context.dictionaryToCreate[context.c] = true;
+      }
+      
+      context.wc = context.w + context.c;
+      if (Object.prototype.hasOwnProperty.call(context.dictionary,context.wc)) {
+        context.w = context.wc;
+      } else {
+        this.produceW(context);
+        // Add wc to the dictionary.
+        context.dictionary[context.wc] = context.dictSize++;
+        context.w = String(context.c);
+      }
+    }
+    
+    // Output the code for w.
+    if (context.w !== "") {
+      this.produceW(context);
+    }
+    
+    // Mark the end of the stream
+    this.writeBits(context.numBits, 2, context.data);
+    
+    // Flush the last char
+    while (context.data.val>0) this.writeBit(0,context.data)
+    return context.data.string;
+  },
+  
+  readBit : function(data) {
+    var res = data.val & data.position;
+    data.position >>= 1;
+    if (data.position == 0) {
+      data.position = 32768;
+      data.val = data.string.charCodeAt(data.index++);
+    }
+    //data.val = (data.val << 1);
+    return res>0 ? 1 : 0;
+  },
+  
+  readBits : function(numBits, data) {
+    var res = 0;
+    var maxpower = Math.pow(2,numBits);
+    var power=1;
+    while (power!=maxpower) {
+      res |= this.readBit(data) * power;
+      power <<= 1;
+    }
+    return res;
+  },
+  
+  decompress: function (compressed) {
+    var dictionary = {},
+        next,
+        enlargeIn = 4,
+        dictSize = 4,
+        numBits = 3,
+        entry = "",
+        result = "",
+        i,
+        w,
+        c,
+        errorCount=0,
+        literal,
+        data = {string:compressed, val:compressed.charCodeAt(0), position:32768, index:1};
+    
+    for (i = 0; i < 3; i += 1) {
+      dictionary[i] = i;
+    }
+    
+    next = this.readBits(2, data);
+    switch (next) {
+      case 0: 
+        c = String.fromCharCode(this.readBits(8, data));
+        break;
+      case 1: 
+        c = String.fromCharCode(this.readBits(16, data));
+        break;
+      case 2: 
+        return "";
+    }
+    dictionary[3] = c;
+    w = result = c;
+    while (true) {
+      c = this.readBits(numBits, data);
+      
+      switch (c) {
+        case 0: 
+          if (errorCount++ > 10000) return "Error";
+          c = String.fromCharCode(this.readBits(8, data));
+          dictionary[dictSize++] = c;
+          c = dictSize-1;
+          enlargeIn--;
+          break;
+        case 1: 
+          c = String.fromCharCode(this.readBits(16, data));
+          dictionary[dictSize++] = c;
+          c = dictSize-1;
+          enlargeIn--;
+          break;
+        case 2: 
+          return result;
+      }
+      
+      if (enlargeIn == 0) {
+        enlargeIn = Math.pow(2, numBits);
+        numBits++;
+      }
+
+      if (dictionary[c]) {
+        entry = dictionary[c];
+      } else {
+        if (c === dictSize) {
+          entry = w + w.charAt(0);
+        } else {
+          return null;
+        }
+      }
+      result += entry;
+      
+      // Add w+entry[0] to the dictionary.
+      dictionary[dictSize++] = w + entry.charAt(0);
+      enlargeIn--;
+      
+      w = entry;
+      
+      if (enlargeIn == 0) {
+        enlargeIn = Math.pow(2, numBits);
+        numBits++;
+      }
+      
+    }
+    return result;
+  }
+};