diff options
Diffstat (limited to 'lib/uuid.c')
| -rw-r--r-- | lib/uuid.c | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/lib/uuid.c b/lib/uuid.c index ab30fbf9152..d0187007d0e 100644 --- a/lib/uuid.c +++ b/lib/uuid.c @@ -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. * |