1 files changed, 90 insertions, 0 deletions
diff --git a/shlibs/blkid/src/fat.h b/shlibs/blkid/src/fat.h
new file mode 100644
index 00000000..b3664641
--- /dev/null
+++ b/shlibs/blkid/src/fat.h
@@ -0,0 +1,90 @@
+#ifndef _BLKID_FAT_H
+#define _BLKID_FAT_H
+
+/* This FAT superblock is required for:
+ *
+ *	superblocks/vfat.c
+ *	partitions/dos.c
+ */
+
+/* Yucky misaligned values */
+struct vfat_super_block {
+/* 00*/	unsigned char	vs_ignored[3];
+/* 03*/	unsigned char	vs_sysid[8];
+/* 0b*/	unsigned char	vs_sector_size[2];
+/* 0d*/	uint8_t		vs_cluster_size;
+/* 0e*/	uint16_t	vs_reserved;
+/* 10*/	uint8_t		vs_fats;
+/* 11*/	unsigned char	vs_dir_entries[2];
+/* 13*/	unsigned char	vs_sectors[2];
+/* 15*/	unsigned char	vs_media;
+/* 16*/	uint16_t	vs_fat_length;
+/* 18*/	uint16_t	vs_secs_track;
+/* 1a*/	uint16_t	vs_heads;
+/* 1c*/	uint32_t	vs_hidden;
+/* 20*/	uint32_t	vs_total_sect;
+/* 24*/	uint32_t	vs_fat32_length;
+/* 28*/	uint16_t	vs_flags;
+/* 2a*/	uint8_t		vs_version[2];
+/* 2c*/	uint32_t	vs_root_cluster;
+/* 30*/	uint16_t	vs_fsinfo_sector;
+/* 32*/	uint16_t	vs_backup_boot;
+/* 34*/	uint16_t	vs_reserved2[6];
+/* 40*/	unsigned char	vs_unknown[3];
+/* 43*/	unsigned char	vs_serno[4];
+/* 47*/	unsigned char	vs_label[11];
+/* 52*/	unsigned char   vs_magic[8];
+/* 5a*/	unsigned char	vs_dummy2[0x1fe - 0x5a];
+/*1fe*/	unsigned char	vs_pmagic[2];
+} __attribute__((packed));
+
+/* Yucky misaligned values */
+struct msdos_super_block {
+/* 00*/	unsigned char	ms_ignored[3];
+/* 03*/	unsigned char	ms_sysid[8];
+/* 0b*/	unsigned char	ms_sector_size[2];
+/* 0d*/	uint8_t		ms_cluster_size;
+/* 0e*/	uint16_t	ms_reserved;
+/* 10*/	uint8_t		ms_fats;
+/* 11*/	unsigned char	ms_dir_entries[2];
+/* 13*/	unsigned char	ms_sectors[2]; /* =0 iff V3 or later */
+/* 15*/	unsigned char	ms_media;
+/* 16*/	uint16_t	ms_fat_length; /* Sectors per FAT */
+/* 18*/	uint16_t	ms_secs_track;
+/* 1a*/	uint16_t	ms_heads;
+/* 1c*/	uint32_t	ms_hidden;
+/* V3 BPB */
+/* 20*/	uint32_t	ms_total_sect; /* iff ms_sectors == 0 */
+/* V4 BPB */
+/* 24*/	unsigned char	ms_unknown[3]; /* Phys drive no., resvd, V4 sig (0x29) */
+/* 27*/	unsigned char	ms_serno[4];
+/* 2b*/	unsigned char	ms_label[11];
+/* 36*/	unsigned char   ms_magic[8];
+/* 3e*/	unsigned char	ms_dummy2[0x1fe - 0x3e];
+/*1fe*/	unsigned char	ms_pmagic[2];
+} __attribute__((packed));
+
+
+static inline int blkid_fat_valid_media(struct msdos_super_block *ms)
+{
+	return 0xf8 <= ms->ms_media || ms->ms_media == 0xf0;
+}
+
+static inline int blkid_fat_valid_sectorsize(
+			struct msdos_super_block *ms,
+			uint16_t *sector_size)
+{
+	unsigned char *tmp = (unsigned char *) &ms->ms_sector_size;
+	uint16_t ssz;
+
+	ssz = tmp[0] + (tmp[1] << 8);
+
+	if (ssz != 0x200 && ssz != 0x400 && ssz != 0x800 && ssz != 0x1000)
+		return 0;
+	if (sector_size)
+		*sector_size = ssz;
+	return 1;
+}
+
+
+#endif /* _BLKID_FAT_H */