24 lines
535 B
C
24 lines
535 B
C
#ifndef _ADFS_FS_H
|
|
#define _ADFS_FS_H
|
|
|
|
#include <uapi/linux/adfs_fs.h>
|
|
|
|
/*
|
|
* Calculate the boot block checksum on an ADFS drive. Note that this will
|
|
* appear to be correct if the sector contains all zeros, so also check that
|
|
* the disk size is non-zero!!!
|
|
*/
|
|
static inline int adfs_checkbblk(unsigned char *ptr)
|
|
{
|
|
unsigned int result = 0;
|
|
unsigned char *p = ptr + 511;
|
|
|
|
do {
|
|
result = (result & 0xff) + (result >> 8);
|
|
result = result + *--p;
|
|
} while (p != ptr);
|
|
|
|
return (result & 0xff) != ptr[511];
|
|
}
|
|
#endif
|