Changeset 25364 for main/trunk/greenstone3/web/interfaces

Timestamp:

2012-04-12T15:03:38+12:00 (12 years ago)

Author:

sjm84

Message:

Made hasClass a global function and also added a (probably) incomplete hashing function

File:

• main/trunk/greenstone3/web/interfaces/oran/js/javascript-global-functions.js (modified) (2 diffs)

main/trunk/greenstone3/web/interfaces/oran/js/javascript-global-functions.js

@@ -23 +23 @@
         return false
     }
+}
+
+gs.functions.hasClass = function(elem, classVal)
+{
+    if(!elem || !elem.getAttribute("class"))
+    {
+        return false;
+    }
+
+    return (elem.getAttribute("class").search(classVal) != -1)
 }
 
@@ -193 +203 @@
 }
 
+function inc(a, b)
+{
+    var carry = 0;
+    var num = 0;
+    var i = 0;
+    
+    while((carry || (i < a.length) || (i < b.length)) && (i < 100))
+    {
+        num = carry;
+        if(i < a.length){num += a[i];}
+        if(i < b.length){num += b[i];}
+        
+        if(num >= 256)
+        {
+            num -= 256;
+            carry = 1;
+        }
+        else
+        {
+            carry = 0;
+        }
+        
+        a[i] = num;
+        
+        i++;
+    }
+}
+
+function ifposDec(a, b)
+{
+    console.log("GOT " + a + " and " + b);
+    var carry = 0;
+    var num = 0;
+    var i = 0;
+    
+    if(b.length > a.length){console.log("RETURNING 0 (1)"); return 0;}
+    if(b.length == a.length)
+    {
+        i = a.length - 1;
+        while(i >= 0)
+        {
+            if(a[i] > b[i]){console.log("BREAKING"); break;}
+            if(a[i] < b[i]){console.log("RETURNING 0 (2)"); return 0;}
+            i--;
+        }
+    }
+    
+    i = 0;
+    while((i < a.length) || (i < b.length))
+    {
+        num = -carry;
+        if(i < a.length){num += a[i];}
+        if(i < b.length){num -= b[i];}
+        
+        if(num < 0)
+        {
+            num += 256;
+            carry = 1;
+        }
+        else
+        {
+            carry = 0;
+        }
+        
+        a[i] = num;
+        i++
+    }
+    console.log("NUM is " + num); 
+    
+    return 1;
+}
+
+function convertNum(a)
+{
+    var result = new Array();
+    var i;
+    var convert = ["0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "a", "b", "c", "d", "e", "f"];
+    
+    if(a.length == 0)
+    {
+        result.push("0");
+        return result;
+    }
+    
+    for(i = a.length - 1; i >= 0; i--)
+    {
+        console.log("i is " + i + " a[i] is " + a[i] + " a[i]/16 is " + Math.floor(a[i]/16) + " a[i]%16 is " + Math.floor(a[i]%16));
+        console.log("Adding " + convert[Math.floor(a[i]/16)] + " and " + convert[Math.floor(a[i]%16)]);
+        result.push(convert[Math.floor(a[i]/16)]);
+        result.push(convert[Math.floor(a[i]%16)]);
+    }
+    
+    var resultString = "";
+    for(var j = 0; j < result.length; j++)
+    {
+        resultString += result[j];
+    }
+    
+    return resultString;
+}
+
+gs.functions.hashString = function(str)
+{
+    var remainder = new Array();
+    var primePow = new Array();
+    var pow = 
+    [
+        255, 255, 255,
+        255, 255, 255,
+        255, 255, 255,
+        255, 255, 1
+    ];
+    
+    for(var i = 0; i < 8; i++)
+    {
+        primePow.push(pow);
+        inc(pow, pow);
+    }
+    
+    for(var i = 0; i < str.length; i++)
+    {
+        var c = str.charAt(i);
+
+        if(remainder.length == 99)
+        {
+            return null;
+        }
+
+        for(var j = remainder.length; j > 0; j--)
+        {
+            remainder[i] = remainder[i-1];
+        }
+        remainder[0] = c;
+
+        for(var j = 7; j >= 0; j--)
+        {
+            ifposDec(remainder, primePow[j]);
+        }   
+    }
+    
+    var returnString = remainder.length + " AWAY TO CONVERT -> ";
+    for(var i = 0; i < remainder.length; i++)
+    {
+        returnString += remainder[i] + " ";
+    }
+    console.log(returnString);
+    
+    return convertNum(remainder);
+}
+
 function callMetadataServer(callingFunction, url, responseFunction)
 {