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-rw-r--r--tools/perf/util/units.c69
1 files changed, 69 insertions, 0 deletions
diff --git a/tools/perf/util/units.c b/tools/perf/util/units.c
new file mode 100644
index 000000000..a46762aec
--- /dev/null
+++ b/tools/perf/util/units.c
@@ -0,0 +1,69 @@
+// SPDX-License-Identifier: GPL-2.0
+#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 = ' ';
+
+ if (value > 1000) {
+ value /= 1000;
+ *unit = 'K';
+ }
+
+ if (value > 1000) {
+ value /= 1000;
+ *unit = 'M';
+ }
+
+ if (value > 1000) {
+ value /= 1000;
+ *unit = 'G';
+ }
+
+ return value;
+}
+
+int unit_number__scnprintf(char *buf, size_t size, u64 n)
+{
+ char unit[4] = "BKMG";
+ int i = 0;
+
+ while (((n / 1024) > 1) && (i < 3)) {
+ n /= 1024;
+ i++;
+ }
+
+ return scnprintf(buf, size, "%" PRIu64 "%c", n, unit[i]);
+}