disk: dos: add some defines for the hardcoded numbers

Add some handy defines for some hardcoded magic numbers related to
extended partition handling.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>

diff --git a/disk/part_dos.c b/disk/part_dos.c
index ef706fb..20d35dc 100644 (file)
--- a/disk/part_dos.c
+++ b/disk/part_dos.c
@@ -42,9 +42,9 @@ static inline unsigned int le32_to_int(unsigned char *le32)
 
 static inline int is_extended(int part_type)
 {
-    return (part_type == 0x5 ||
-           part_type == 0xf ||
-           part_type == 0x85);
+    return (part_type == DOS_PART_TYPE_EXTENDED ||
+           part_type == DOS_PART_TYPE_EXTENDED_LBA ||
+           part_type == DOS_PART_TYPE_EXTENDED_LINUX);
 }
 
 static int get_bootable(dos_partition_t *p)

diff --git a/disk/part_dos.h b/disk/part_dos.h
index 434b021..dd909a9 100644 (file)
--- a/disk/part_dos.h
+++ b/disk/part_dos.h
@@ -15,6 +15,9 @@
 #define DOS_PBR_MEDIA_TYPE_OFFSET      0x15
 #define DOS_MBR        0
 #define DOS_PBR        1
+#define DOS_PART_TYPE_EXTENDED         0x05
+#define DOS_PART_TYPE_EXTENDED_LBA     0x0F
+#define DOS_PART_TYPE_EXTENDED_LINUX   0x85
 
 typedef struct dos_partition {
        unsigned char boot_ind;         /* 0x80 - active                        */