strutil: insist in some mantissa for parse rational

[libsigrok.git] / src / strutil.c

diff --git a/src/strutil.c b/src/strutil.c
index 07ed7b4491ed8b8a6ebd787b6a6ebe25ee7717b9..b6c910f70ca1b70ccdad881251b4de1178b56fb3 100644 (file)
--- a/src/strutil.c
+++ b/src/strutil.c
@@ -615,6 +615,7 @@ SR_API int sr_parse_rational(const char *str, struct sr_rational *ret)
        int32_t fractional_len = 0;
        int32_t exponent = 0;
        bool is_negative = false;
+       bool no_integer, no_fractional;
 
        while (isspace(*str))
                str++;
@@ -622,12 +623,16 @@ SR_API int sr_parse_rational(const char *str, struct sr_rational *ret)
        errno = 0;
        integral = g_ascii_strtoll(str, &endptr, 10);
 
-       if (str == endptr && (str[0] == '-' || str[0] == '+') && str[1] == '.')
+       if (str == endptr && (str[0] == '-' || str[0] == '+') && str[1] == '.') {
                endptr += 1;
-       else if (str == endptr && str[0] == '.')
-               /* EMPTY */;
-       else if (errno)
+               no_integer = true;
+       } else if (str == endptr && str[0] == '.') {
+               no_integer = true;
+       } else if (errno) {
                return SR_ERR;
+       } else {
+               no_integer = false;
+       }
 
        if (integral < 0 || str[0] == '-')
                is_negative = true;
@@ -645,6 +650,9 @@ SR_API int sr_parse_rational(const char *str, struct sr_rational *ret)
                }
                if (errno)
                        return SR_ERR;
+               no_fractional = endptr == start;
+               if (no_integer && no_fractional)
+                       return SR_ERR;
                fractional_len = endptr - start;
        }