1 #include <inttypes.h> 2 #include <string.h> 3 4 /** 5 * ata_id_string - Convert IDENTIFY DEVICE page into string 6 * @id: IDENTIFY DEVICE results we will examine 7 * @s: string into which data is output 8 * @ofs: offset into identify device page 9 * @len: length of string to return. must be an even number. 10 * 11 * The strings in the IDENTIFY DEVICE page are broken up into 12 * 16-bit chunks. Run through the string, and output each 13 * 8-bit chunk linearly, regardless of platform. 14 * 15 * LOCKING: 16 * caller. 17 */ 18 void ata_id_string(const uint16_t * id, unsigned char *s, 19 unsigned int ofs, unsigned int len) 20 { 21 unsigned int c; 22 23 while (len > 0) { 24 c = id[ofs] >> 8; 25 *s = c; 26 s++; 27 28 c = id[ofs] & 0xff; 29 *s = c; 30 s++; 31 32 ofs++; 33 len -= 2; 34 } 35 } 36 37 /** 38 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string 39 * @id: IDENTIFY DEVICE results we will examine 40 * @s: string into which data is output 41 * @ofs: offset into identify device page 42 * @len: length of string to return. must be an odd number. 43 * 44 * This function is identical to ata_id_string except that it 45 * trims trailing spaces and terminates the resulting string with 46 * null. @len must be actual maximum length (even number) + 1. 47 * 48 * LOCKING: 49 * caller. 50 */ 51 void ata_id_c_string(const uint16_t * id, unsigned char *s, 52 unsigned int ofs, unsigned int len) 53 { 54 unsigned char *p; 55 56 ata_id_string(id, s, ofs, len - 1); 57 58 p = s + strnlen((const char *)s, len - 1); 59 while (p > s && p[-1] == ' ') 60 p--; 61 *p = '\0'; 62 } 63
