1 files changed, 29 insertions, 0 deletions
diff --git a/tools/perf/util/units.c b/tools/perf/util/units.c
index f6a2a3d117d5..4767ec2c5ef6 100644
--- a/tools/perf/util/units.c
+++ b/tools/perf/util/units.c
@@ -1,8 +1,37 @@
 #include "units.h"
 #include <inttypes.h>
+#include <limits.h>
+#include <stdlib.h>
+#include <string.h>
 #include <linux/kernel.h>
 #include <linux/time64.h>
 
+unsigned long parse_tag_value(const char *str, struct parse_tag *tags)
+{
+	struct parse_tag *i = tags;
+
+	while (i->tag) {
+		char *s = strchr(str, i->tag);
+
+		if (s) {
+			unsigned long int value;
+			char *endptr;
+
+			value = strtoul(str, &endptr, 10);
+			if (s != endptr)
+				break;
+
+			if (value > ULONG_MAX / i->mult)
+				break;
+			value *= i->mult;
+			return value;
+		}
+		i++;
+	}
+
+	return (unsigned long) -1;
+}
+
 unsigned long convert_unit(unsigned long value, char *unit)
 {
 	*unit = ' ';