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#ifndef BLKID_PARTITIONS_DOS_H
#define BLKID_PARTITIONS_DOS_H
struct dos_partition {
unsigned char boot_ind; /* 0x80 - active */
unsigned char bh, bs, bc; /* begin CHS */
unsigned char sys_type;
unsigned char eh, es, ec; /* end CHS */
unsigned char start_sect[4];
unsigned char nr_sects[4];
} __attribute__((packed));
#define BLKID_MSDOS_PT_OFFSET 0x1be
/* assemble badly aligned little endian integer */
static inline unsigned int assemble4le(const unsigned char *p)
{
return p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
}
static inline unsigned int dos_partition_start(struct dos_partition *p)
{
return assemble4le(&(p->start_sect[0]));
}
static inline unsigned int dos_partition_size(struct dos_partition *p)
{
return assemble4le(&(p->nr_sects[0]));
}
static inline int is_valid_mbr_signature(const unsigned char *mbr)
{
return mbr[510] == 0x55 && mbr[511] == 0xaa ? 1 : 0;
}
static inline unsigned int dos_parttable_id(const unsigned char *mbr)
{
return assemble4le(&mbr[440]);
}
#endif /* BLKID_PARTITIONS_DOS_H */
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