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samba-mirror/lib/util/util_str_hex.c
Volker Lendecke 2b9ba992b6 lib: Simplify parse_guid_string() and ndr_syntax_id_from_string()
Return "bool" instead of NTSTATUS, use hex_byte() instead of
read_hex_bytes(). And parse directly into a struct GUID instead of the
components. 99 lines less code.

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Samuel Cabrero <scabrero@samba.org>
2021-01-28 16:58:35 +00:00

70 lines
1.4 KiB
C

#include "replace.h"
#include "util_str_hex.h"
#include "lib/util/data_blob.h"
#include "librpc/gen_ndr/misc.h"
static bool hex_uint16(const char *in, uint16_t *out)
{
uint8_t hi=0, lo=0;
bool ok = hex_byte(in, &hi) && hex_byte(in+2, &lo);
*out = (((uint16_t)hi)<<8) + lo;
return ok;
}
bool hex_uint32(const char *in, uint32_t *out)
{
uint16_t hi=0, lo=0;
bool ok = hex_uint16(in, &hi) && hex_uint16(in+4, &lo);
*out = (((uint32_t)hi)<<16) + lo;
return ok;
}
bool parse_guid_string(const char *s, struct GUID *guid)
{
bool ok;
int i;
/* "e12b56b6-0a95-11d1-adbb-00c04fd8d5cd"
| | | | |
| | | | \ node[6]
| | | \_____ clock_seq[2]
| | \__________ time_hi_and_version
| \_______________ time_mid
\_____________________ time_low
*/
ok = hex_uint32(s, &guid->time_low);
if (!ok || (s[8] != '-')) {
return false;
}
s += 9;
ok = hex_uint16(s, &guid->time_mid);
if (!ok || (s[4] != '-')) {
return false;
}
s += 5;
ok = hex_uint16(s, &guid->time_hi_and_version);
if (!ok || (s[4] != '-')) {
return false;
}
s += 5;
ok = hex_byte(s, &guid->clock_seq[0]) &&
hex_byte(s+2, &guid->clock_seq[1]);
if (!ok || (s[4] != '-')) {
return false;
}
s += 5;
for (i = 0; i < 6; i++) {
ok = hex_byte(s, &guid->node[i]);
if (!ok) {
return false;
}
s += 2;
}
return true;
}