create format_name and filter_names properties

Author: Changaco

libarchive/entry.py

@@ -383,3 +383,7 @@ def rdevminor(self):
     @rdevminor.setter
     def rdevminor(self, value):
         ffi.entry_set_rdevminor(self._entry_p, value)
+
+    @property
+    def format_name(self):
+        return ffi.format_name(self._pointer)

libarchive/ffi.py

@@ -162,6 +162,9 @@ def get_write_filter_function(filter_name):
 errno = ffi('errno', [c_archive_p], c_int)
 error_string = ffi('error_string', [c_archive_p], c_char_p)
 ffi('filter_bytes', [c_archive_p, c_int], c_longlong)
+ffi('filter_count', [c_archive_p], c_int)
+ffi('filter_name', [c_archive_p, c_int], c_char_p)
+ffi('format_name', [c_archive_p], c_char_p)
 
 # archive_entry
 

libarchive/read.py

@@ -31,6 +31,11 @@ def __iter__(self):
     def bytes_read(self):
         return ffi.filter_bytes(self._pointer, -1)
 
+    @property
+    def filter_names(self):
+        count = ffi.filter_count(self._pointer)
+        return [ffi.filter_name(self._pointer, i) for i in range(count - 1)]
+
 
 @contextmanager
 def new_archive_read(format_name='all', filter_name='all', passphrase=None):