calendarspec: sub-second support, v3

[elogind.git] / src / basic / parse-util.c

diff --git a/src/basic/parse-util.c b/src/basic/parse-util.c
index e50355977e7d438ca80aa5ba1733146d163af128..6e24bdee4dfedfdb64fb8b1bcd5df47090bd63d2 100644 (file)
--- a/src/basic/parse-util.c
+++ b/src/basic/parse-util.c
@@ -492,3 +492,39 @@ int safe_atod(const char *s, double *ret_d) {
         *ret_d = (double) d;
         return 0;
 }
+
+int parse_fractional_part_u(const char **p, size_t digits, unsigned *res) {
+        size_t i;
+        unsigned val = 0;
+        const char *s;
+
+        s = *p;
+
+        /* accept any number of digits, strtoull is limted to 19 */
+        for(i=0; i < digits; i++,s++) {
+                if (*s < '0' || *s > '9') {
+                        if (i == 0)
+                                return -EINVAL;
+
+                        /* too few digits, pad with 0 */
+                        for (; i < digits; i++)
+                                val *= 10;
+
+                        break;
+                }
+
+                val *= 10;
+                val += *s - '0';
+        }
+
+        /* maybe round up */
+        if (*s >= '5' && *s <= '9')
+                val++;
+
+        s += strspn(s, DIGITS);
+
+        *p = s;
+        *res = val;
+
+        return 0;
+}