Function format_uuid_v1

Engine/source/core/util/uuid.cpp:223–236

format_uuid_v1 -- make a UUID from the timestamp, clockseq, and node ID */

/* format_uuid_v1 -- make a UUID from the timestamp, clockseq, and node ID */
static void format_uuid_v1(xuuid_t * uuid, unsigned16 clock_seq,
			   uuid_time_t timestamp, uuid_node_t node)
{
    /* Construct a version 1 uuid with the information we've gathered
     * plus a few constants. */
    uuid->time_low = (unsigned long)(timestamp & 0xFFFFFFFF);
    uuid->time_mid = (unsigned short)((timestamp >> 32) & 0xFFFF);
    uuid->time_hi_and_version = (unsigned short)((timestamp >> 48) & 0x0FFF);
    uuid->time_hi_and_version |= (1 << 12);
    uuid->clock_seq_low = clock_seq & 0xFF;
    uuid->clock_seq_hi_and_reserved = (clock_seq & 0x3F00) >> 8;
    uuid->clock_seq_hi_and_reserved |= 0x80;
    memcpy(&uuid->node, &node, sizeof uuid->node);
}

/* get-current_time -- get time as 60 bit 100ns ticks since whenever.
   Compensate for the fact that real clock resolution is less than 100ns. */