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/*
* Copyright 2011 Calxeda, Inc.
*
* SPDX-License-Identifier: GPL-2.0+
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*/
#include <linux/ctype.h>
#include "common.h"
/*
* This is what a UUID string looks like.
*
* x is a hexadecimal character. fields are separated by '-'s. When converting
* to a binary UUID, le means the field should be converted to little endian,
* and be means it should be converted to big endian.
*
* 0 9 14 19 24
* xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
* le le le be be
*/
int uuid_str_valid(const char *uuid)
{
int i, valid;
if (uuid == NULL)
return 0;
for (i = 0, valid = 1; uuid[i] && valid; i++) {
switch (i) {
case 8: case 13: case 18: case 23:
valid = (uuid[i] == '-');
break;
default:
valid = isxdigit(uuid[i]);
break;
}
}
if (i != 36 || !valid)
return 0;
return 1;
}
void uuid_str_to_bin(const char *uuid, unsigned char *out)
{
uint16_t tmp16;
uint32_t tmp32;
uint64_t tmp64;
if (!uuid || !out)
return;
tmp32 = cpu_to_le32(simple_strtoul(uuid, NULL, 16));
memcpy(out, &tmp32, 4);
tmp16 = cpu_to_le16(simple_strtoul(uuid + 9, NULL, 16));
memcpy(out + 4, &tmp16, 2);
tmp16 = cpu_to_le16(simple_strtoul(uuid + 14, NULL, 16));
memcpy(out + 6, &tmp16, 2);
tmp16 = cpu_to_be16(simple_strtoul(uuid + 19, NULL, 16));
memcpy(out + 8, &tmp16, 2);
tmp64 = cpu_to_be64(simple_strtoull(uuid + 24, NULL, 16));
memcpy(out + 10, (char *)&tmp64 + 2, 6);
}