/* SPDX-License-Identifier: MIT */
/* Copyright (C) 2014 by John Cronin
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "guid.h"
#include "unaligned.h"
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#define GUID_FMT \
"%08X-%04hX-%04hX-%02hhX%02hhX-%02hhX%02hhX%02hhX%02hhX%02hhX%02hhX"
int
guid_to_string(char *str, const GUID *guid)
{
if (guid == NULL) {
return -1;
}
if (str == NULL) {
return -1;
}
sprintf(str, GUID_FMT, guid->data1, guid->data2, guid->data3,
guid->data4[0], guid->data4[1], guid->data4[2], guid->data4[3],
guid->data4[4], guid->data4[5], guid->data4[6], guid->data4[7]);
return 0;
}
int
string_to_guid(GUID *guid, const char *str)
{
if (guid == NULL) {
return -1;
}
if (str == NULL) {
return -1;
}
sscanf(str, GUID_FMT, &guid->data1, &guid->data2, &guid->data3,
&guid->data4[0], &guid->data4[1], &guid->data4[2],
&guid->data4[3], &guid->data4[4], &guid->data4[5],
&guid->data4[6], &guid->data4[7]);
return 0;
}
int
guid_to_bytestring(uint8_t *bytes, const GUID *guid)
{
if (guid == NULL) {
return -1;
}
if (bytes == NULL) {
return -1;
}
set_u32(bytes + 0, guid->data1);
set_u16(bytes + 4, guid->data2);
set_u16(bytes + 6, guid->data3);
for (int i = 0; i < 8; i++) {
bytes[8 + i] = guid->data4[i];
}
return 0;
}
int
guid_is_zero(const GUID *guid)
{
if (guid->data1 != 0) {
return 0;
}
if (guid->data2 != 0) {
return 0;
}
if (guid->data3 != 0) {
return 0;
}
for (int i = 0; i < 8; i++) {
if (guid->data4[i] != 0) {
return 0;
}
}
return 1;
}
static uint32_t
rnd()
{
return random() & 0xff; /* just a byte please */
}
int
random_guid(GUID *guid)
{
if (guid == NULL) {
return -1;
}
static int initialized = 0;
if (!initialized) {
srandom(time(NULL));
initialized = 1;
}
guid->data1 = rnd() | rnd() << 8 | rnd() << 16 | rnd() << 24;
guid->data2 = rnd() | rnd() << 8;
guid->data3 = rnd() | ((rnd() & 0x0f) | 0x40) << 8;
for (int i = 0; i < 8; i++) {
guid->data4[i] = rnd();
}
return 0;
}