59 lines
1.5 KiB
C
59 lines
1.5 KiB
C
|
#include <stddef.h>
|
||
|
#include <stdint.h>
|
||
|
#include <stdbool.h>
|
||
|
#include <lib/guid.h>
|
||
|
#include <lib/blib.h>
|
||
|
|
||
|
bool is_valid_guid(const char *s) {
|
||
|
for (size_t i = 0; ; i++) {
|
||
|
switch (i) {
|
||
|
case 8:
|
||
|
case 13:
|
||
|
case 18:
|
||
|
case 23:
|
||
|
if (s[i] != '-')
|
||
|
return false;
|
||
|
break;
|
||
|
case 36:
|
||
|
return s[i] == 0;
|
||
|
default:
|
||
|
if (digit_to_int(s[i]) == -1)
|
||
|
return false;
|
||
|
break;
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
static void guid_convert_le_cluster(uint8_t *dest, const char *s, int len) {
|
||
|
size_t p = 0;
|
||
|
for (int i = len - 1; i >= 0; i--) {
|
||
|
int val = digit_to_int(s[i]);
|
||
|
|
||
|
i % 2 ? (dest[p] = val) : (dest[p++] |= val << 4);
|
||
|
}
|
||
|
}
|
||
|
*/
|
||
|
|
||
|
static void guid_convert_be_cluster(uint8_t *dest, const char *s, int len) {
|
||
|
size_t p = 0;
|
||
|
for (int i = 0; i < len; i++) {
|
||
|
int val = digit_to_int(s[i]);
|
||
|
|
||
|
i % 2 ? (dest[p++] |= val) : (dest[p] = val << 4);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
bool string_to_guid(struct guid *guid, const char *s) {
|
||
|
if (!is_valid_guid(s))
|
||
|
return false;
|
||
|
|
||
|
guid_convert_be_cluster((uint8_t *)guid + 0, s + 0, 8);
|
||
|
guid_convert_be_cluster((uint8_t *)guid + 4, s + 9, 4);
|
||
|
guid_convert_be_cluster((uint8_t *)guid + 6, s + 14, 4);
|
||
|
guid_convert_be_cluster((uint8_t *)guid + 8, s + 19, 4);
|
||
|
guid_convert_be_cluster((uint8_t *)guid + 10, s + 24, 12);
|
||
|
|
||
|
return true;
|
||
|
}
|