1 files changed, 43 insertions, 0 deletions
diff --git a/misc-utils/lsfd-filter.h b/misc-utils/lsfd-filter.h
new file mode 100644
index 0000000..db5cbd6
--- /dev/null
+++ b/misc-utils/lsfd-filter.h
@@ -0,0 +1,43 @@
+/*
+ * lsfd-filter.c - filtering engine for lsfd
+ *
+ * Copyright (C) 2021 Red Hat, Inc.
+ * Copyright (C) 2021 Masatake YAMATO <yamato@redhat.com>
+ *
+ * This file may be redistributed under the terms of the
+ * GNU Lesser General Public License.
+ */
+#ifndef UTIL_LINUX_LSFD_FILTER_H
+#define UTIL_LINUX_LSFD_FILTER_H
+
+#include "libsmartcols.h"
+#include <stdio.h>
+#include <stdbool.h>
+
+#define LSFD_FILTER_UNKNOWN_COL_ID -1
+
+struct lsfd_filter;
+
+/*
+ * @column_name_to_id: a function converting a column name to its id.
+ *
+ * @column_name_to_id should return LSFD_FILTER_UNKNOWN_COL_ID if
+ * an unknown column name is given.
+ */
+struct lsfd_filter *lsfd_filter_new(const char *const expr, struct libscols_table *tb,
+				      int ncols,
+				      int (*column_name_to_id)(const char *, void *),
+				      struct libscols_column *(*add_column_by_id)(struct libscols_table *, int, void*),
+				      void *data);
+
+/* Call lsfd_filter_get_errmsg() after lsfd_filter_new() to detect
+ * whether lsfd_filter_new() is failed or not. Returning NULL means,
+ * lsfd_filter_new() is successful. */
+const char *lsfd_filter_get_errmsg(struct lsfd_filter *filter);
+void lsfd_filter_free(struct lsfd_filter *filter);
+bool lsfd_filter_apply(struct lsfd_filter *filter, struct libscols_line *ln);
+
+/* Dumping AST. */
+void lsfd_filter_dump(struct lsfd_filter *filter, FILE *stream);
+
+#endif	/* UTIL_LINUX_LSFD_FILTER_H */