- if(cfsections>=MAX_SECTIONS)
- die("too many modules %d",cfsections);
- cfsection[cfsections].section=section;
- cfsection[cfsections].items=items;
- cfsections++;
+ char *msg = NULL;
+ const struct unit *u;
+
+ if (!*value)
+ msg = "Missing number";
+ else {
+ errno = 0;
+ char *end;
+ uns x = strtoul(value, &end, 0);
+ if (errno == ERANGE)
+ msg = cf_rngerr;
+ else if (u = cf_lookup_unit(value, end, &msg)) {
+ u64 y = (u64)x * u->num;
+ if (y % u->den)
+ msg = "Number is not an integer";
+ else {
+ y /= u->den;
+ if (y > 0xffffffff)
+ msg = cf_rngerr;
+ *varp = y;
+ }
+ } else
+ *varp = x;
+ }
+ return msg;
+}
+
+byte *cf_parse_u64(byte *value, u64 *varp)
+{
+ char *msg = NULL;
+ const struct unit *u;
+
+ if (!*value)
+ msg = "Missing number";
+ else {
+ errno = 0;
+ char *end;
+ u64 x = strtoull(value, &end, 0);
+ if (errno == ERANGE)
+ msg = cf_rngerr;
+ else if (u = cf_lookup_unit(value, end, &msg)) {
+ if (x > ~(u64)0 / u->num)
+ msg = "Number out of range";
+ else {
+ x *= u->num;
+ if (x % u->den)
+ msg = "Number is not an integer";
+ else
+ *varp = x / u->den;
+ }
+ } else
+ *varp = x;
+ }
+ return msg;
+}
+
+byte *cf_parse_double(byte *value, double *varp)
+{
+ char *msg = NULL;
+ const struct unit *u;
+
+ if (!*value)
+ msg = "Missing number";
+ else {
+ errno = 0;
+ char *end;
+ double x = strtoul(value, &end, 0);
+ if (errno == ERANGE)
+ msg = cf_rngerr;
+ else if (u = cf_lookup_unit(value, end, &msg))
+ *varp = x * u->num / u->den;
+ else
+ *varp = x;
+ }
+ return msg;