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-rw-r--r--misc-utils/lsfd-counter.h30
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diff --git a/misc-utils/lsfd-counter.h b/misc-utils/lsfd-counter.h
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+/*
+ * lsfd-counter.h - counter implementation used in --summary option
+ *
+ * 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_COUNTER_H
+#define UTIL_LINUX_LSFD_COUNTER_H
+
+#include "libsmartcols.h"
+#include "lsfd-filter.h"
+#include <stdbool.h>
+
+struct lsfd_counter;
+
+/* The created counter takes the ownership of the filter; the filter is
+ * freed in lsfd_counter_free().
+ */
+struct lsfd_counter *lsfd_counter_new(const char *const name, struct lsfd_filter *filter);
+void lsfd_counter_free(struct lsfd_counter *counter);
+
+bool lsfd_counter_accumulate(struct lsfd_counter *counter, struct libscols_line *ln);
+
+const char *lsfd_counter_name(struct lsfd_counter *counter);
+size_t lsfd_counter_value(struct lsfd_counter *counter);
+
+#endif /* UTIL_LINUX_LSFD_COUNTER_H */