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lib: uuid: introduce uuid_str_to_le_bin function

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convert UUID string to little endian binary data

Signed-off-by: Abdellatif El Khlifi <abdellatif.elkhlifi@arm.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Cc: Tom Rini <trini@konsulko.com>
Cc: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Cc: Jens Wiklander <jens.wiklander@linaro.org>
This commit is contained in:
Abdellatif El Khlifi 2023-08-04 14:33:38 +01:00 committed by Tom Rini
parent d998735179
commit 7048f26ccb
2 changed files with 63 additions and 0 deletions
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15
include/uuid.h
View file

@ -2,6 +2,10 @@
/*
* Copyright (C) 2014 Samsung Electronics
* Przemyslaw Marczak <p.marczak@samsung.com>
* Copyright 2022-2023 Arm Limited and/or its affiliates <open-source-office@arm.com>
*
* Authors:
* Abdellatif El Khlifi <abdellatif.elkhlifi@arm.com>
*/
#ifndef __UUID_H__
#define __UUID_H__
@ -44,4 +48,15 @@ int uuid_guid_get_bin(const char *guid_str, unsigned char *guid_bin);
const char *uuid_guid_get_str(const unsigned char *guid_bin);
void gen_rand_uuid(unsigned char *uuid_bin);
void gen_rand_uuid_str(char *uuid_str, int str_format);
/**
* uuid_str_to_le_bin() - Convert string UUID to little endian binary data.
* @uuid_str: pointer to UUID string
* @uuid_bin: pointer to allocated array for little endian output [16B]
* Return:
* uuid_bin filled with little endian UUID data
* On success 0 is returned. Otherwise, failure code.
*/
int uuid_str_to_le_bin(const char *uuid_str, unsigned char *uuid_bin);
#endif

48
lib/uuid.c
View file

@ -1,6 +1,10 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2011 Calxeda, Inc.
* Copyright 2022-2023 Arm Limited and/or its affiliates <open-source-office@arm.com>
*
* Authors:
* Abdellatif El Khlifi <abdellatif.elkhlifi@arm.com>
*/
#include <common.h>
@ -354,6 +358,50 @@ int uuid_str_to_bin(const char *uuid_str, unsigned char *uuid_bin,
return 0;
}
/**
* uuid_str_to_le_bin() - Convert string UUID to little endian binary data.
* @uuid_str: pointer to UUID string
* @uuid_bin: pointer to allocated array for little endian output [16B]
*
* UUID string is 36 characters (36 bytes):
*
* xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
*
* where x is a hexadecimal character. Fields are separated by '-'s.
* When converting to a little endian binary UUID, the string fields are reversed.
*
* Return:
*
* uuid_bin filled with little endian UUID data
* On success 0 is returned. Otherwise, failure code.
*/
int uuid_str_to_le_bin(const char *uuid_str, unsigned char *uuid_bin)
{
u16 tmp16;
u32 tmp32;
u64 tmp64;
if (!uuid_str_valid(uuid_str) || !uuid_bin)
return -EINVAL;
tmp32 = cpu_to_le32(hextoul(uuid_str, NULL));
memcpy(uuid_bin, &tmp32, 4);
tmp16 = cpu_to_le16(hextoul(uuid_str + 9, NULL));
memcpy(uuid_bin + 4, &tmp16, 2);
tmp16 = cpu_to_le16(hextoul(uuid_str + 14, NULL));
memcpy(uuid_bin + 6, &tmp16, 2);
tmp16 = cpu_to_le16(hextoul(uuid_str + 19, NULL));
memcpy(uuid_bin + 8, &tmp16, 2);
tmp64 = cpu_to_le64(simple_strtoull(uuid_str + 24, NULL, 16));
memcpy(uuid_bin + 10, &tmp64, 6);
return 0;
}
/*
* uuid_bin_to_str() - convert big endian binary data to string UUID or GUID.
*