X-Git-Url: https://sigrok.org/gitweb/?a=blobdiff_plain;f=src%2Fstrutil.c;fp=src%2Fstrutil.c;h=1f558f15ffe4c38f81818a5ef5bb1509403b71b9;hb=51bf39a1633ca5817bc91aff19259e0a9b8fbc13;hp=5f48e87bebc02cd2f0eaca8c516aba7b6349e5a1;hpb=3387a5d8ee7d28cd5927ce36d21765bc051ea175;p=libsigrok.git

diff --git a/src/strutil.c b/src/strutil.c
index 5f48e87b..1f558f15 100644
--- a/src/strutil.c
+++ b/src/strutil.c
@@ -621,12 +621,15 @@ SR_API int sr_parse_rational(const char *str, struct sr_rational *ret)
 
 	if (str == endptr && (str[0] == '-' || str[0] == '+') && str[1] == '.')
 		endptr += 1;
+	else if ((str == endptr && str[0] == '.' ))
+		;
 	else if (errno)
 		return SR_ERR;
 
 	if (integral < 0 || str[0] == '-')
 		is_negative = true;
 
+	errno = 0;
 	if (*endptr == '.') {
 		const char* start = endptr + 1;
 		fractional = g_ascii_strtoll(start, &endptr, 10);
@@ -635,6 +638,7 @@ SR_API int sr_parse_rational(const char *str, struct sr_rational *ret)
 		fractional_len = endptr - start;
 	}
 
+	errno = 0;
 	if ((*endptr == 'E') || (*endptr == 'e')) {
 		exponent = g_ascii_strtoll(endptr + 1, &endptr, 10);
 		if (errno)