Add constant for the last possible valid cluster number.

diff --git a/libexfat/exfat.h b/libexfat/exfat.h
index bca0d24..a5a9ba1 100644 (file)
--- a/libexfat/exfat.h
+++ b/libexfat/exfat.h
@@ -38,7 +38,7 @@
 #define IS_CONTIGUOUS(node) (((node).flags & EXFAT_ATTRIB_CONTIGUOUS) != 0)
 #define SECTOR_SIZE(sb) (1 << (sb).sector_bits)
 #define CLUSTER_SIZE(sb) (SECTOR_SIZE(sb) << (sb).spc_bits)
-#define CLUSTER_INVALID(c) ((c) == EXFAT_CLUSTER_BAD || (c) == EXFAT_CLUSTER_END)
+#define CLUSTER_INVALID(c) ((c) > EXFAT_LAST_DATA_CLUSTER)
 
 #define MIN(a, b) ((a) < (b) ? (a) : (b))
 #define DIV_ROUND_UP(x, d) (((x) + (d) - 1) / (d))

diff --git a/libexfat/exfatfs.h b/libexfat/exfatfs.h
index 61e39a1..78a62e6 100644 (file)
--- a/libexfat/exfatfs.h
+++ b/libexfat/exfatfs.h
@@ -26,6 +26,7 @@
 typedef uint32_t cluster_t;            /* cluster number */
 
 #define EXFAT_FIRST_DATA_CLUSTER 2
+#define EXFAT_LAST_DATA_CLUSTER 0xfffffff6
 
 #define EXFAT_CLUSTER_FREE         0 /* free cluster */
 #define EXFAT_CLUSTER_BAD 0xfffffff7 /* cluster contains bad sector */