From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from phobos.denx.de (phobos.denx.de [85.214.62.61]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 0CEA2C6FA86 for ; Mon, 26 Sep 2022 10:19:57 +0000 (UTC) Received: from h2850616.stratoserver.net (localhost [IPv6:::1]) by phobos.denx.de (Postfix) with ESMTP id 366B484DBB; Mon, 26 Sep 2022 12:19:40 +0200 (CEST) Authentication-Results: phobos.denx.de; dmarc=fail (p=none dis=none) header.from=arm.com Authentication-Results: phobos.denx.de; spf=pass smtp.mailfrom=u-boot-bounces@lists.denx.de Received: by phobos.denx.de (Postfix, from userid 109) id EDD1B84DA9; Mon, 26 Sep 2022 12:18:05 +0200 (CEST) Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by phobos.denx.de (Postfix) with ESMTP id 926AE84DA7 for ; Mon, 26 Sep 2022 12:17:52 +0200 (CEST) Authentication-Results: phobos.denx.de; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: phobos.denx.de; spf=pass smtp.mailfrom=abdellatif.elkhlifi@arm.com Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 5F0281063; Mon, 26 Sep 2022 03:17:58 -0700 (PDT) Received: from e121910.arm.com (unknown [10.57.32.60]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id C0B1D3F73B; Mon, 26 Sep 2022 03:17:49 -0700 (PDT) From: Abdellatif El Khlifi To: abdellatif.elkhlifi@arm.com Cc: u-boot@lists.denx.de, ilias.apalodimas@linaro.org, jens.wiklander@linaro.org, trini@konsulko.com, sjg@chromium.org, vishnu.banavath@arm.com, xueliang.zhong@arm.com, achin.gupta@arm.com, nd@arm.com Subject: [PATCH v4 03/10] lib: uuid: introduce be_uuid_str_to_le_bin function Date: Mon, 26 Sep 2022 11:17:16 +0100 Message-Id: <20220926101723.9965-4-abdellatif.elkhlifi@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20220926101723.9965-1-abdellatif.elkhlifi@arm.com> References: <20220801172053.20163-1-abdellatif.elkhlifi@arm.com> <20220926101723.9965-1-abdellatif.elkhlifi@arm.com> X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.39 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: u-boot-bounces@lists.denx.de Sender: "U-Boot" X-Virus-Scanned: clamav-milter 0.103.6 at phobos.denx.de X-Virus-Status: Clean convert big endian UUID string to little endian buffer Changelog: =============== v4: * rename ffa_uuid_str_to_bin to be_uuid_str_to_le_bin and put in a standalone commit (the current) v3: * introduce ffa_uuid_str_to_bin (provided by arm_ffa: introduce Arm FF-A low-level driver) Signed-off-by: Abdellatif El Khlifi Cc: Tom Rini Cc: Simon Glass Cc: Ilias Apalodimas Cc: Jens Wiklander --- include/uuid.h | 8 +++++++ lib/uuid.c | 64 ++++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 72 insertions(+) diff --git a/include/uuid.h b/include/uuid.h index 4a4883d3b5..ad3af350f9 100644 --- a/include/uuid.h +++ b/include/uuid.h @@ -2,6 +2,8 @@ /* * Copyright (C) 2014 Samsung Electronics * Przemyslaw Marczak + * (C) Copyright 2022 ARM Limited + * Abdellatif El Khlifi */ #ifndef __UUID_H__ #define __UUID_H__ @@ -44,4 +46,10 @@ 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); + +/** + * be_uuid_str_to_le_bin - Converts a big endian UUID string to a little endian buffer + */ +int be_uuid_str_to_le_bin(const char *uuid_str, unsigned char *uuid_bin); + #endif diff --git a/lib/uuid.c b/lib/uuid.c index 465e1ac38f..15a9ab49d5 100644 --- a/lib/uuid.c +++ b/lib/uuid.c @@ -1,6 +1,8 @@ // SPDX-License-Identifier: GPL-2.0+ /* * Copyright 2011 Calxeda, Inc. + * (C) Copyright 2022 ARM Limited + * Abdellatif El Khlifi */ #include @@ -346,6 +348,68 @@ int uuid_str_to_bin(const char *uuid_str, unsigned char *uuid_bin, return 0; } +/** + * be_uuid_str_to_le_bin - Converts a big endian UUID string to a little endian buffer + * @uuid_str: UUID string in big endian format (36 bytes wide + '/0') + * @uuid_bin: preallocated 16 bytes UUID buffer in little endian format + * + * UUID string is 36 characters (36 bytes): + * + * xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx + * be be be be be + * + * where x is a hexadecimal character. Fields are separated by '-'s. + * When converting to a binary UUID, these endianness rules apply: + * be: means the field in the string is considered a big endian hex number + * and should be converted to little endian binary format + * + * Return: + * + * uuid_bin filled with little endian UUID data + * On success 0 is returned. Otherwise, failure code. + */ +int be_uuid_str_to_le_bin(const char *uuid_str, unsigned char *uuid_bin) +{ + u16 tmp16 = 0; + u32 tmp32 = 0; + u64 tmp64 = 0; + + if (!uuid_str_valid(uuid_str) || !uuid_bin) + return -EINVAL; + + /* + * reverse bytes from big to little endian + */ + tmp32 = simple_strtoul(uuid_str, NULL, 16); + memcpy(uuid_bin, &tmp32, 4); + + /* + * reverse bytes from big to little endian + */ + tmp16 = simple_strtoul(uuid_str + 9, NULL, 16); + memcpy(uuid_bin + 4, &tmp16, 2); + + /* + * reverse bytes from big to little endian + */ + tmp16 = simple_strtoul(uuid_str + 14, NULL, 16); + memcpy(uuid_bin + 6, &tmp16, 2); + + /* + * reverse bytes from big to little endian + */ + tmp16 = simple_strtoul(uuid_str + 19, NULL, 16); + memcpy(uuid_bin + 8, &tmp16, 2); + + /* + * reverse bytes from big to little endian + */ + tmp64 = simple_strtoull(uuid_str + 24, NULL, 16); + memcpy(uuid_bin + 10, (char *)&tmp64, 6); + + return 0; +} + /* * uuid_bin_to_str() - convert big endian binary data to string UUID or GUID. * -- 2.17.1