the sorted input array
number of elements in the array
size of every element in bytes
function to compare two elements, @search_data will always be passed as second argument
search mode that should be used
element that should be found
data to pass to @search_func
The address of the found element or %NULL if nothing was found
Searches inside @array for @search_data by using the comparison function @search_func. @array must be sorted ascending.
As @search_data is always passed as second argument to @search_func it's not required that @search_data has the same type as the array elements.
The complexity of this search function is O(log (num_elements)).