dmi_uuid_encode

Synopsis

#include <opendmi/utils/uuid.h>

void dmi_uuid_encode(dmi_uuid_t value, uint8_t out[16]);

Description

The dmi_uuid_encode function performs the inverse of dmi_uuid_decode: it converts a dmi_uuid_t value in RFC 4122 (big-endian) byte order back into the raw 16-byte format used by SMBIOS structures.

The time_low, time_mid, and time_hi_and_version fields are byte-swapped from big-endian (RFC 4122) to little-endian (SMBIOS) byte order. The clock_seq_hi_and_reserved, clock_seq_low, and node fields are copied without modification.

Parameters

value: UUID in RFC 4122 (big-endian) byte order.
out: Buffer of exactly 16 bytes that receives the UUID in SMBIOS (little-endian) byte order.

Errors

None.

Examples

/* Construct a UUID in RFC 4122 representation */
dmi_uuid_t uuid = {
    .time_low                = 0x1624a9df,
    .time_mid                = 0x5e13,
    .time_hi_and_version     = 0x47fc,
    .clock_seq_hi_and_reserved = 0x87,
    .clock_seq_low             = 0x4a,
    .node                    = { 0xdf, 0x3a, 0xff, 0x14, 0x30, 0x89 }
};

/* Encode into the 16-byte SMBIOS format */
uint8_t out[16];
dmi_uuid_encode(uuid, out);