lib: Move get_rate(), get_rate64() from tc here

The functions get_rate() and get_rate64() are useful for parsing rate-like
values. The DCB tool will find these useful in the maxrate subtool.
Move them over to lib so that they can be easily reused.

Signed-off-by: Petr Machata <me@pmachata.org>
Signed-off-by: David Ahern <dsahern@gmail.com>

include/utils.h

@@ -162,6 +162,8 @@ int get_be64(__be64 *val, const char *arg, int base);
 int get_be32(__be32 *val, const char *arg, int base);
 int get_be16(__be16 *val, const char *arg, int base);
 int get_addr64(__u64 *ap, const char *cp);
+int get_rate(unsigned int *rate, const char *str);
+int get_rate64(__u64 *rate, const char *str);
 
 int hex2mem(const char *buf, uint8_t *mem, int count);
 char *hexstring_n2a(const __u8 *str, int len, char *buf, int blen);

lib/utils.c

@@ -513,6 +513,85 @@ int get_addr64(__u64 *ap, const char *cp)
 	return 1;
 }
 
+/* See http://physics.nist.gov/cuu/Units/binary.html */
+static const struct rate_suffix {
+	const char *name;
+	double scale;
+} suffixes[] = {
+	{ "bit",	1. },
+	{ "Kibit",	1024. },
+	{ "kbit",	1000. },
+	{ "mibit",	1024.*1024. },
+	{ "mbit",	1000000. },
+	{ "gibit",	1024.*1024.*1024. },
+	{ "gbit",	1000000000. },
+	{ "tibit",	1024.*1024.*1024.*1024. },
+	{ "tbit",	1000000000000. },
+	{ "Bps",	8. },
+	{ "KiBps",	8.*1024. },
+	{ "KBps",	8000. },
+	{ "MiBps",	8.*1024*1024. },
+	{ "MBps",	8000000. },
+	{ "GiBps",	8.*1024.*1024.*1024. },
+	{ "GBps",	8000000000. },
+	{ "TiBps",	8.*1024.*1024.*1024.*1024. },
+	{ "TBps",	8000000000000. },
+	{ NULL }
+};
+
+int get_rate(unsigned int *rate, const char *str)
+{
+	char *p;
+	double bps = strtod(str, &p);
+	const struct rate_suffix *s;
+
+	if (p == str)
+		return -1;
+
+	for (s = suffixes; s->name; ++s) {
+		if (strcasecmp(s->name, p) == 0) {
+			bps *= s->scale;
+			p += strlen(p);
+			break;
+		}
+	}
+
+	if (*p)
+		return -1; /* unknown suffix */
+
+	bps /= 8; /* -> bytes per second */
+	*rate = bps;
+	/* detect if an overflow happened */
+	if (*rate != floor(bps))
+		return -1;
+	return 0;
+}
+
+int get_rate64(__u64 *rate, const char *str)
+{
+	char *p;
+	double bps = strtod(str, &p);
+	const struct rate_suffix *s;
+
+	if (p == str)
+		return -1;
+
+	for (s = suffixes; s->name; ++s) {
+		if (strcasecmp(s->name, p) == 0) {
+			bps *= s->scale;
+			p += strlen(p);
+			break;
+		}
+	}
+
+	if (*p)
+		return -1; /* unknown suffix */
+
+	bps /= 8; /* -> bytes per second */
+	*rate = bps;
+	return 0;
+}
+
 static void set_address_type(inet_prefix *addr)
 {
 	switch (addr->family) {

tc/tc_util.c

@@ -164,32 +164,6 @@ char *sprint_tc_classid(__u32 h, char *buf)
 	return buf;
 }
 
-/* See http://physics.nist.gov/cuu/Units/binary.html */
-static const struct rate_suffix {
-	const char *name;
-	double scale;
-} suffixes[] = {
-	{ "bit",	1. },
-	{ "Kibit",	1024. },
-	{ "kbit",	1000. },
-	{ "mibit",	1024.*1024. },
-	{ "mbit",	1000000. },
-	{ "gibit",	1024.*1024.*1024. },
-	{ "gbit",	1000000000. },
-	{ "tibit",	1024.*1024.*1024.*1024. },
-	{ "tbit",	1000000000000. },
-	{ "Bps",	8. },
-	{ "KiBps",	8.*1024. },
-	{ "KBps",	8000. },
-	{ "MiBps",	8.*1024*1024. },
-	{ "MBps",	8000000. },
-	{ "GiBps",	8.*1024.*1024.*1024. },
-	{ "GBps",	8000000000. },
-	{ "TiBps",	8.*1024.*1024.*1024.*1024. },
-	{ "TBps",	8000000000000. },
-	{ NULL }
-};
-
 /* Parse a percent e.g: '30%'
  * return: 0 = ok, -1 = error, 1 = out of range
  */
@@ -273,59 +247,6 @@ int get_percent_rate64(__u64 *rate, const char *str, const char *dev)
 	return get_rate64(rate, r_str);
 }
 
-int get_rate(unsigned int *rate, const char *str)
-{
-	char *p;
-	double bps = strtod(str, &p);
-	const struct rate_suffix *s;
-
-	if (p == str)
-		return -1;
-
-	for (s = suffixes; s->name; ++s) {
-		if (strcasecmp(s->name, p) == 0) {
-			bps *= s->scale;
-			p += strlen(p);
-			break;
-		}
-	}
-
-	if (*p)
-		return -1; /* unknown suffix */
-
-	bps /= 8; /* -> bytes per second */
-	*rate = bps;
-	/* detect if an overflow happened */
-	if (*rate != floor(bps))
-		return -1;
-	return 0;
-}
-
-int get_rate64(__u64 *rate, const char *str)
-{
-	char *p;
-	double bps = strtod(str, &p);
-	const struct rate_suffix *s;
-
-	if (p == str)
-		return -1;
-
-	for (s = suffixes; s->name; ++s) {
-		if (strcasecmp(s->name, p) == 0) {
-			bps *= s->scale;
-			p += strlen(p);
-			break;
-		}
-	}
-
-	if (*p)
-		return -1; /* unknown suffix */
-
-	bps /= 8; /* -> bytes per second */
-	*rate = bps;
-	return 0;
-}
-
 void tc_print_rate(enum output_type t, const char *key, const char *fmt,
 		   unsigned long long rate)
 {

tc/tc_util.h

@@ -76,9 +76,7 @@ struct qdisc_util *get_qdisc_kind(const char *str);
 struct filter_util *get_filter_kind(const char *str);
 
 int get_qdisc_handle(__u32 *h, const char *str);
-int get_rate(unsigned int *rate, const char *str);
 int get_percent_rate(unsigned int *rate, const char *str, const char *dev);
-int get_rate64(__u64 *rate, const char *str);
 int get_percent_rate64(__u64 *rate, const char *str, const char *dev);
 int get_size(unsigned int *size, const char *str);
 int get_size_and_cell(unsigned int *size, int *cell_log, char *str);