X-Git-Url: http://sigrok.org/gitweb/?a=blobdiff_plain;f=src%2Fstrutil.c;h=30e992b815468e5a86c1210652b3a19aece2720b;hb=57a88297dd0c57eb9eab2d79bdf681ddcca29f00;hp=fd9a438e647a6210e63091050b78c7790ffe97be;hpb=b5df922e4fbe30d04882658778d2900939e869fe;p=libsigrok.git

diff --git a/src/strutil.c b/src/strutil.c
index fd9a438e..30e992b8 100644
--- a/src/strutil.c
+++ b/src/strutil.c
@@ -23,6 +23,7 @@
 #include <string.h>
 #include <strings.h>
 #include <errno.h>
+#include <stdbool.h>
 #include <libsigrok/libsigrok.h>
 #include "libsigrok-internal.h"
 
@@ -168,6 +169,38 @@ SR_PRIV int sr_atof(const char *str, float *ret)
 	return SR_OK;
 }
 
+/**
+ * @private
+ *
+ * Convert a string representation of a numeric value to a double. The
+ * conversion is strict and will fail if the complete string does not represent
+ * a valid double. The function sets errno according to the details of the
+ * failure. This version ignores the locale.
+ *
+ * @param str The string representation to convert.
+ * @param ret Pointer to double where the result of the conversion will be stored.
+ *
+ * @retval SR_OK Conversion successful.
+ * @retval SR_ERR Failure.
+ */
+SR_PRIV int sr_atod_ascii(const char *str, double *ret)
+{
+	double tmp;
+	char *endptr = NULL;
+
+	errno = 0;
+	tmp = g_ascii_strtod(str, &endptr);
+
+	if (!endptr || *endptr || errno) {
+		if (!errno)
+			errno = EINVAL;
+		return SR_ERR;
+	}
+
+	*ret = tmp;
+	return SR_OK;
+}
+
 /**
  * @private
  *
@@ -233,13 +266,19 @@ SR_API int sr_parse_rational(const char *str, struct sr_rational *ret)
 	int64_t denominator = 1;
 	int32_t fractional_len = 0;
 	int32_t exponent = 0;
+	bool is_negative = false;
 
 	errno = 0;
 	integral = g_ascii_strtoll(str, &endptr, 10);
 
-	if (errno)
+	if (str == endptr && (str[0] == '-' || str[0] == '+') && str[1] == '.')
+		endptr += 1;
+	else if (errno)
 		return SR_ERR;
 
+	if (integral < 0 || str[0] == '-')
+		is_negative = true;
+
 	if (*endptr == '.') {
 		const char* start = endptr + 1;
 		fractional = g_ascii_strtoll(start, &endptr, 10);
@@ -261,7 +300,7 @@ SR_API int sr_parse_rational(const char *str, struct sr_rational *ret)
 		integral *= 10;
 	exponent -= fractional_len;
 
-	if (integral >= 0)
+	if (!is_negative)
 		integral += fractional;
 	else
 		integral -= fractional;