frontend: Added sdb_fe_parse_expr().

[sysdb.git] / src / frontend / parser.c

diff --git a/src/frontend/parser.c b/src/frontend/parser.c
index 3184ffc23fb355c3ec5e652f7276292ebac5229c..b0ae01a55bf618ee02f44e3098c290dec273c383 100644 (file)
--- a/src/frontend/parser.c
+++ b/src/frontend/parser.c
@@ -126,5 +126,44 @@ sdb_fe_parse_matcher(const char *cond, int len)
        return m;
 } /* sdb_fe_parse_matcher */
 
+sdb_store_expr_t *
+sdb_fe_parse_expr(const char *expr, int len)
+{
+       sdb_fe_yyscan_t scanner;
+       sdb_fe_yyextra_t yyextra;
+
+       sdb_conn_node_t *node;
+       sdb_store_expr_t *e;
+
+       int yyres;
+
+       if (scanner_init(expr, len, &scanner, &yyextra))
+               return NULL;
+
+       yyextra.mode = SDB_PARSE_EXPR;
+
+       yyres = sdb_fe_yyparse(scanner);
+       sdb_fe_scanner_destroy(scanner);
+
+       if (yyres) {
+               sdb_llist_destroy(yyextra.parsetree);
+               return NULL;
+       }
+
+       node = SDB_CONN_NODE(sdb_llist_get(yyextra.parsetree, 0));
+       if (! node)
+               return NULL;
+
+       if (node->cmd == CONNECTION_EXPR)
+               e = CONN_EXPR(node)->expr;
+       else
+               e = NULL;
+
+       CONN_EXPR(node)->expr = NULL;
+       sdb_llist_destroy(yyextra.parsetree);
+       sdb_object_deref(SDB_OBJ(node));
+       return e;
+} /* sdb_fe_parse_expr */
+
 /* vim: set tw=78 sw=4 ts=4 noexpandtab : */