/*
* Finds the place in the given range of specified sorted array, where the
* element should be inserted for getting sorted array. Uses exponential
* search algorithm.
*
* @param arr -
* the array with already sorted range
*
* @param val -
* object to be inserted
*
* @param l -
* the start index
*
* @param r -
* the end index
*
* @param bnd -
* possible values 0,-1. "-1" - val is located at index more then
* elements equals to val. "0" - val is located at index less
* then elements equals to val.
*
*/
private static int find(Object[] arr, java.lang.Comparable <Object> val, int bnd, int l, int r)
{
int m = l;
int d = 1;
while (m <= r)
{
if (val.compareTo(arr[m]) > bnd)
{
l = m + 1;
}
else
{
r = m - 1;
break;
}
m += d;
d <<= 1;
}
while (l <= r)
{
m = java.dotnet.lang.Operator.shiftRightUnsignet((l + r), 1);
if (val.compareTo(arr[m]) > bnd)
{
l = m + 1;
}
else
{
r = m - 1;
}
}
return(l - 1);
}
public int compare(T o1, T o2)
{
java.lang.Comparable <T> c2 = (java.lang.Comparable <T>)o2;
return(c2.compareTo(o1));
}
/*
* Performs a sort on the section of the array between the given indices
* using a mergesort with exponential search algorithm (in which the merge
* is performed by exponential search). n*log(n) performance is guaranteed
* and in the average case it will be faster then any mergesort in which the
* merge is performed by linear search.
*
* @param in -
* the array for sorting.
* @param out -
* the result, sorted array.
* @param start
* the start index
* @param end
* the end index + 1
*/
private static void mergeSort(Object[] inJ, Object[] outJ, int start,
int end)
{
int len = end - start;
// use insertion sort for small arrays
if (len <= SIMPLE_LENGTH)
{
for (int i = start + 1; i < end; i++)
{
java.lang.Comparable <Object> current = (java.lang.Comparable <Object>)outJ[i];
Object prev = outJ[i - 1];
if (current.compareTo(prev) < 0)
{
int j = i;
do
{
outJ[j--] = prev;
} while (j > start &&
current.compareTo(prev = outJ[j - 1]) < 0);
outJ[j] = current;
}
}
return;
}
int med = java.dotnet.lang.Operator.shiftRightUnsignet((end + start), 1);
mergeSort(outJ, inJ, start, med);
mergeSort(outJ, inJ, med, end);
// merging
// if arrays are already sorted - no merge
if (((java.lang.Comparable <Object>)inJ[med - 1]).compareTo(inJ[med]) <= 0)
{
java.lang.SystemJ.arraycopy(inJ, start, outJ, start, len);
return;
}
int r = med, i2 = start;
// use merging with exponential search
do
{
java.lang.Comparable <Object> fromVal = (java.lang.Comparable <Object>)inJ[start];
java.lang.Comparable <Object> rVal = (java.lang.Comparable <Object>)inJ[r];
if (fromVal.compareTo(rVal) <= 0)
{
int l_1 = find(inJ, rVal, -1, start + 1, med - 1);
int toCopy = l_1 - start + 1;
java.lang.SystemJ.arraycopy(inJ, start, outJ, i2, toCopy);
i2 += toCopy;
outJ[i2++] = rVal;
r++;
start = l_1 + 1;
}
else
{
int r_1 = find(inJ, fromVal, 0, r + 1, end - 1);
int toCopy = r_1 - r + 1;
java.lang.SystemJ.arraycopy(inJ, r, outJ, i2, toCopy);
i2 += toCopy;
outJ[i2++] = fromVal;
start++;
r = r_1 + 1;
}
} while ((end - r) > 0 && (med - start) > 0);
// copy rest of array
if ((end - r) <= 0)
{
java.lang.SystemJ.arraycopy(inJ, start, outJ, i2, med - start);
}
else
{
java.lang.SystemJ.arraycopy(inJ, r, outJ, i2, end - r);
}
}