From: Bert Vermeulen <redacted>
Date: Tue, 15 May 2012 18:46:14 +0000 (+0200)
Subject: sr: add period parser
X-Git-Tag: dsupstream~946
X-Git-Url: https://sigrok.org/gitaction?a=commitdiff_plain;h=76f4c61086b314e66e92dd571f37defd3f714554;p=libsigrok.git

sr: add period parser
---

diff --git a/sigrok-proto.h b/sigrok-proto.h
index df31b90d..d5a9adb9 100644
--- a/sigrok-proto.h
+++ b/sigrok-proto.h
@@ -119,6 +119,7 @@ SR_API char **sr_parse_triggerstring(struct sr_dev *dev,
 SR_API int sr_parse_sizestring(const char *sizestring, uint64_t *size);
 SR_API uint64_t sr_parse_timestring(const char *timestring);
 SR_API gboolean sr_parse_boolstring(const char *boolstring);
+SR_API int sr_parse_period(const char *periodstr, struct sr_rational *r);
 
 /*--- version.c -------------------------------------------------------------*/
 
diff --git a/strutil.c b/strutil.c
index cb51b2ab..ea69a2af 100644
--- a/strutil.c
+++ b/strutil.c
@@ -314,3 +314,33 @@ SR_API gboolean sr_parse_boolstring(const char *boolstr)
 
 	return FALSE;
 }
+
+SR_API int sr_parse_period(const char *periodstr, struct sr_rational *r)
+{
+	char *s;
+
+	r->p = strtoull(periodstr, &s, 10);
+	if (r->p == 0 && s == periodstr)
+		/* No digits found. */
+		return SR_ERR_ARG;
+
+	if (s && *s) {
+		while (*s == ' ')
+			s++;
+		if (!strcmp(s, "ns"))
+			r->q = 1000000000L;
+		else if (!strcmp(s, "us"))
+			r->q = 1000000;
+		else if (!strcmp(s, "ms"))
+			r->q = 1000;
+		else if (!strcmp(s, "s"))
+			r->q = 1;
+		else
+			/* Must have a time suffix. */
+			return SR_ERR_ARG;
+	}
+
+	return SR_OK;
+}
+
+