1 files changed, 41 insertions, 0 deletions
diff --git a/common/expr.h b/common/expr.h
new file mode 100644
index 0000000..9861a49
--- /dev/null
+++ b/common/expr.h
@@ -0,0 +1,41 @@
+/*
+   expr.h - limited shell-like expression parsing functions
+   This file is part of the nss-pam-ldapd library.
+
+   Copyright (C) 2009 Arthur de Jong
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with this library; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+   02110-1301 USA
+*/
+
+#ifndef _EXPR_H
+#define _EXPR_H 1
+
+#include "compat/attrs.h"
+#include "common/set.h"
+
+typedef const char *(*expander_t)(const char *name,void *expander_arg);
+
+/* Parse the expression and store the result in buffer, using the
+   expander function to expand variable names to values. If the expression
+   is invalid or the result didn't fit in the buffer NULL is returned. */
+MUST_USE const char *expr_parse(const char *expr,char *buffer,size_t buflen,
+                                expander_t expander,void *expander_arg);
+
+/* Return the variable names that are used in expr. If set is NULL a new one
+   is allocated, otherwise the passed set is added to. */
+SET *expr_vars(const char *expr,SET *set);
+
+#endif /* not _EXPR_H */