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Diffstat (limited to 'shared/ossp_uuid/OVERVIEW')
| -rw-r--r-- | shared/ossp_uuid/OVERVIEW | 81 |
1 files changed, 0 insertions, 81 deletions
diff --git a/shared/ossp_uuid/OVERVIEW b/shared/ossp_uuid/OVERVIEW deleted file mode 100644 index 2fb518f1..00000000 --- a/shared/ossp_uuid/OVERVIEW +++ /dev/null @@ -1,81 +0,0 @@ - - _ ___ ____ ____ ____ _ _ - |_|_ _ / _ \/ ___/ ___|| _ \ _ _ _ _(_) __| | - _|_||_| | | | \___ \___ \| |_) | | | | | | | | |/ _` | - |_||_|_| | |_| |___) |__) | __/ | |_| | |_| | | (_| | - |_|_|_| \___/|____/____/|_| \__,_|\__,_|_|\__,_| - - OSSP uuid - Universally Unique Identifier - - OVERVIEW - - A UUID consists of 128 bits (16-octets) which are split into 6 - octet-bounded unsigned integer fields ("time_low", "time_mid", - "time_hi_and_version", "clk_seq_hi_res", "clk_seq_low" and "node") and - where two fields are multiplexed with a fixed size 4-bit "version" and - a variable sized 2-3 bit "variant" field. - - The UUID octets are counted from left to right 15 to 0 and the bits - in each octet are counted from left to right 7 to 0 (most significant - bit first, least significant bit last). The unsigned integer fields - formed out of multiple octets are stored in "network byte order" (most - significant octet first, least significant octet last). A UUID is - stored and transmitted from left to right, i.e., in "network byte - order" with the most significant octet first and the least significant - octet last. - - Illustration 1: - (single octet array, less compact, more annotations) - - - Bits: [4] [2-3] - Field: version variant - MSO -->| |<-- -->| |<-- LSO - \ | | | | / - Octet: 15 14 13 12 11 10 | |9 8 | | 7 6 5 4 3 2 1 0 - +------++------++------++------++------++------++------++------++------++------++------++------++------++------++------++------+ - UUID: | || || || || || |#### || |##: || || || || || || || | - +------++------++------++------++------++------++------++------++------++------++------++------++------++------++------++------+ - Bit: 76543210765432107654321076543210765432107654321076543210765432107654321076543210765432107654321076543210765432107654321076543210 - /| || || || || || |\ - MSB | || || || || || | LSB - |<---------------------------->||<------------>||<------------>||<---->||<---->||<-------------------------------------------->| - time_hi clk_seq clk_seq - Field: time_low time_mid _and_version _hi_res _low node - Bits: [32] [16] [16] [5-6] [8] [48] - - - Illustration 2: - (two octet arrays, more compact, less annotations) - - [4] - version - -->| |<-- - | | - | | [16] - [32] [16] | |time_hi - time_low time_mid | _and_version - |<---------------------------->||<------------>||<------------>| - | MSO || || | | - | / || || | | - | 15 14 13 12 || 11 10 || |9 8 | - 7654321076543210765432107654321076543210765432107654321076543210 - /+------++------++------++------++------++------++------++------+~ - MSB | || || || || || |#### || | ... - +------++------++------++------++------++------++------++------+~ - ~+------++------++------++------++------++------++------++------+ - ... ##: || || || || || || || | LSB - ~+------++------++------++------++------++------++------++------+/ - 7654321076543210765432107654321076543210765432107654321076543210 - | | 7 || 6 || 5 4 3 2 1 0 | - | | || || / | - | | || || LSO | - |<---->||<---->||<-------------------------------------------->| - |clk_seq clk_seq node - |_hi_res _low [48] - |[5-6] [8] - | | - -->| |<-- - variant - [2-3] - |