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 dc7fdbb87f72f79d1cedf3ef0d8a672ab0f5883b..6e24bdee4dfedfdb64fb8b1bcd5df47090bd63d2 100644 (file)
--- a/src/basic/parse-util.c
+++ b/src/basic/parse-util.c
@@ -225,8 +225,7 @@ int parse_size(const char *t, uint64_t base, uint64_t *size) {
         return 0;
 }
 
-/// UNNEEDED by elogind
-#if 0
+#if 0 /// UNNEEDED by elogind
 int parse_range(const char *t, unsigned *lower, unsigned *upper) {
         _cleanup_free_ char *word = NULL;
         unsigned l, u;
@@ -493,3 +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;
+}