Support uninitialized logical fields

dBASE allows logical fields to be uninitialized and marks such fields
with '?'. To be able to distinguish such values from false, we retrieve
them as NULL.

git-svn-id: http://svn.php.net/repository/pecl/dbase/trunk@340804 c90b9560-bf6c-de11-be94-00142212c4b1

Author: cmb69

dbase.c

@@ -431,6 +431,12 @@ static void php_dbase_get_record(INTERNAL_FUNCTION_PARAMETERS, int assoc)
 					} else {
 						add_assoc_bool(return_value, cur_f->db_fname, 1);
 					}
+				} else if (*str_value == '?') {
+					if (!assoc) {
+						add_next_index_null(return_value);
+					} else {
+						add_assoc_null(return_value, cur_f->db_fname);
+					}
 				} else {
 					if (!assoc) {
 						add_next_index_bool(return_value, 0);

tests/type_logical.phpt

@@ -13,7 +13,7 @@ $db = dbase_create(
     )
 );
 
-foreach (array('T', 'Y', 'F', 'N', ' ', '1', '0') as $flag) {
+foreach (array('T', 'Y', 'F', 'N', ' ', '1', '0', '?') as $flag) {
     dbase_add_record($db, array($flag));
 }
 
@@ -40,6 +40,8 @@ bool(false)
 bool(false)
 bool(false)
 bool(false)
+NULL
+NULL
 ===DONE===
 --CLEAN--
 <?php