Allow parse_size to return 0.

We will shortly introduce --data-offset= which is allowed to
be zero.  We will want to use parse_size() so it needs to be
able to return '0' without it being an error.

So define INVALID_SECTORS to be an impossible value (currently '1')
and return and test for it consistently.

Signed-off-by: NeilBrown <neilb@suse.de>

1 files changed, 3 insertions, 3 deletions

diff --git a/util.c b/util.c
index fad72cc..4bd07e1 100644
--- a/util.c
+++ b/util.c
@@ -194,7 +194,7 @@ unsigned long long parse_size(char *size)
 	 * followed by 'K', 'M', or 'G'.
 	 * Without a suffix, K is assumed.
 	 * Number returned is in sectors (half-K)
-	 * 0 returned on error.
+	 * INVALID_SECTORS returned on error.
 	 */
 	char *c;
 	long long s = strtoll(size, &c, 10);
@@ -215,9 +215,9 @@ unsigned long long parse_size(char *size)
 			break;
 		}
 	} else
-		s = 0;
+		s = INVALID_SECTORS;
 	if (*c)
-		s = 0;
+		s = INVALID_SECTORS;
 	return s;
 }