Searches a Tree using search_func.
The search_func is called with a pointer to the key of a key/value pair in the tree, and the passed in user_data
. If search_func returns 0 for a key/value pair, then the corresponding value is returned as the result of
search_key. If search_func returns -1, searching will proceed among the key/value pairs that have
a smaller key; if search_func returns 1, searching will proceed among the key/value pairs that have a larger key.
| this |
a Tree |
| search_func |
a function used to search the Tree |
| user_data |
the data passed as the second argument to |
|
the value corresponding to the found key, or null if the key was not found |