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-rw-r--r--tools/perf/util/units.c29
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 = ' ';