63 lines
1.6 KiB
C
63 lines
1.6 KiB
C
#include <inttypes.h>
|
|
#include <string.h>
|
|
|
|
/**
|
|
* ata_id_string - Convert IDENTIFY DEVICE page into string
|
|
* @id: IDENTIFY DEVICE results we will examine
|
|
* @s: string into which data is output
|
|
* @ofs: offset into identify device page
|
|
* @len: length of string to return. must be an even number.
|
|
*
|
|
* The strings in the IDENTIFY DEVICE page are broken up into
|
|
* 16-bit chunks. Run through the string, and output each
|
|
* 8-bit chunk linearly, regardless of platform.
|
|
*
|
|
* LOCKING:
|
|
* caller.
|
|
*/
|
|
void ata_id_string(const uint16_t * id, unsigned char *s,
|
|
unsigned int ofs, unsigned int len)
|
|
{
|
|
unsigned int c;
|
|
|
|
while (len > 0) {
|
|
c = id[ofs] >> 8;
|
|
*s = c;
|
|
s++;
|
|
|
|
c = id[ofs] & 0xff;
|
|
*s = c;
|
|
s++;
|
|
|
|
ofs++;
|
|
len -= 2;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* ata_id_c_string - Convert IDENTIFY DEVICE page into C string
|
|
* @id: IDENTIFY DEVICE results we will examine
|
|
* @s: string into which data is output
|
|
* @ofs: offset into identify device page
|
|
* @len: length of string to return. must be an odd number.
|
|
*
|
|
* This function is identical to ata_id_string except that it
|
|
* trims trailing spaces and terminates the resulting string with
|
|
* null. @len must be actual maximum length (even number) + 1.
|
|
*
|
|
* LOCKING:
|
|
* caller.
|
|
*/
|
|
void ata_id_c_string(const uint16_t * id, unsigned char *s,
|
|
unsigned int ofs, unsigned int len)
|
|
{
|
|
unsigned char *p;
|
|
|
|
ata_id_string(id, s, ofs, len - 1);
|
|
|
|
p = s + strnlen((const char *)s, len - 1);
|
|
while (p > s && p[-1] == ' ')
|
|
p--;
|
|
*p = '\0';
|
|
}
|