1*b1cdbd2cSJim Jagielski /************************************************************** 2*b1cdbd2cSJim Jagielski * 3*b1cdbd2cSJim Jagielski * Licensed to the Apache Software Foundation (ASF) under one 4*b1cdbd2cSJim Jagielski * or more contributor license agreements. See the NOTICE file 5*b1cdbd2cSJim Jagielski * distributed with this work for additional information 6*b1cdbd2cSJim Jagielski * regarding copyright ownership. The ASF licenses this file 7*b1cdbd2cSJim Jagielski * to you under the Apache License, Version 2.0 (the 8*b1cdbd2cSJim Jagielski * "License"); you may not use this file except in compliance 9*b1cdbd2cSJim Jagielski * with the License. You may obtain a copy of the License at 10*b1cdbd2cSJim Jagielski * 11*b1cdbd2cSJim Jagielski * http://www.apache.org/licenses/LICENSE-2.0 12*b1cdbd2cSJim Jagielski * 13*b1cdbd2cSJim Jagielski * Unless required by applicable law or agreed to in writing, 14*b1cdbd2cSJim Jagielski * software distributed under the License is distributed on an 15*b1cdbd2cSJim Jagielski * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 16*b1cdbd2cSJim Jagielski * KIND, either express or implied. See the License for the 17*b1cdbd2cSJim Jagielski * specific language governing permissions and limitations 18*b1cdbd2cSJim Jagielski * under the License. 19*b1cdbd2cSJim Jagielski * 20*b1cdbd2cSJim Jagielski *************************************************************/ 21*b1cdbd2cSJim Jagielski 22*b1cdbd2cSJim Jagielski 23*b1cdbd2cSJim Jagielski #ifndef _RTL_UUID_H_ 24*b1cdbd2cSJim Jagielski #define _RTL_UUID_H_ 25*b1cdbd2cSJim Jagielski 26*b1cdbd2cSJim Jagielski 27*b1cdbd2cSJim Jagielski #include <sal/types.h> 28*b1cdbd2cSJim Jagielski #include <rtl/string.h> 29*b1cdbd2cSJim Jagielski 30*b1cdbd2cSJim Jagielski /** 31*b1cdbd2cSJim Jagielski @HTML 32*b1cdbd2cSJim Jagielski @file 33*b1cdbd2cSJim Jagielski Specification (from draft-leach-uuids-guids-01.txt ) 34*b1cdbd2cSJim Jagielski 35*b1cdbd2cSJim Jagielski <p> 36*b1cdbd2cSJim Jagielski A UUID is an identifier that is unique across both space and time, 37*b1cdbd2cSJim Jagielski with respect to the space of all UUIDs. To be precise, the UUID 38*b1cdbd2cSJim Jagielski consists of a finite bit space. Thus, collision cannot be avoided in 39*b1cdbd2cSJim Jagielski principle. A UUID can be used for multiple purposes, from tagging objects 40*b1cdbd2cSJim Jagielski with an extremely short lifetime, to reliably identifying very persistent 41*b1cdbd2cSJim Jagielski objects across a network. 42*b1cdbd2cSJim Jagielski 43*b1cdbd2cSJim Jagielski <p> 44*b1cdbd2cSJim Jagielski The generation of UUIDs does not require that a registration 45*b1cdbd2cSJim Jagielski authority be contacted for each identifier. Instead, Version 4 UUIDs are 46*b1cdbd2cSJim Jagielski generated from (pseudo unique) sequences of (pseudo) random bits. 47*b1cdbd2cSJim Jagielski */ 48*b1cdbd2cSJim Jagielski 49*b1cdbd2cSJim Jagielski #ifdef __cplusplus 50*b1cdbd2cSJim Jagielski extern "C" { 51*b1cdbd2cSJim Jagielski #endif 52*b1cdbd2cSJim Jagielski 53*b1cdbd2cSJim Jagielski /** Generates a new Version 4 (random number based) UUID (Universally Unique 54*b1cdbd2cSJim Jagielski IDentifier). 55*b1cdbd2cSJim Jagielski 56*b1cdbd2cSJim Jagielski @param pTargetUUID pointer to at least 16 bytes of memory. After the call it contains 57*b1cdbd2cSJim Jagielski the newly generated uuid in network byte order. 58*b1cdbd2cSJim Jagielski @param pPredecessorUUID ignored (was used when this function returned 59*b1cdbd2cSJim Jagielski Version 1 instead of Version 4 UUIDs). 60*b1cdbd2cSJim Jagielski @param bUseEthernetAddress ignored (was used when this function returned 61*b1cdbd2cSJim Jagielski Version 1 instead of Version 4 UUIDs). 62*b1cdbd2cSJim Jagielski */ 63*b1cdbd2cSJim Jagielski void SAL_CALL rtl_createUuid( sal_uInt8 *pTargetUUID , 64*b1cdbd2cSJim Jagielski const sal_uInt8 *pPredecessorUUID, 65*b1cdbd2cSJim Jagielski sal_Bool bUseEthernetAddress ); 66*b1cdbd2cSJim Jagielski 67*b1cdbd2cSJim Jagielski /** Compare two UUID's lexically 68*b1cdbd2cSJim Jagielski 69*b1cdbd2cSJim Jagielski <p> 70*b1cdbd2cSJim Jagielski Note: lexical ordering is not temporal ordering! 71*b1cdbd2cSJim Jagielski <p> 72*b1cdbd2cSJim Jagielski Note: For equalnesschecking, a memcmp(pUUID1,pUUID2,16) is more efficient 73*b1cdbd2cSJim Jagielski 74*b1cdbd2cSJim Jagielski @return 75*b1cdbd2cSJim Jagielski <ul> 76*b1cdbd2cSJim Jagielski <li>-1 u1 is lexically before u2 77*b1cdbd2cSJim Jagielski <li>0 u1 is equal to u2 78*b1cdbd2cSJim Jagielski <li>1 u1 is lexically after u2 79*b1cdbd2cSJim Jagielski </ul> 80*b1cdbd2cSJim Jagielski 81*b1cdbd2cSJim Jagielski */ 82*b1cdbd2cSJim Jagielski sal_Int32 SAL_CALL rtl_compareUuid( const sal_uInt8 *pUUID1 , const sal_uInt8 *pUUID2 ); 83*b1cdbd2cSJim Jagielski 84*b1cdbd2cSJim Jagielski /** Creates named UUIDs. 85*b1cdbd2cSJim Jagielski 86*b1cdbd2cSJim Jagielski <p> 87*b1cdbd2cSJim Jagielski The version 3 UUID is meant for generating UUIDs from <em>names</em> that 88*b1cdbd2cSJim Jagielski are drawn from, and unique within, some <em>name space</em>. Some examples 89*b1cdbd2cSJim Jagielski of names (and, implicitly, name spaces) might be DNS names, URLs, ISO 90*b1cdbd2cSJim Jagielski Object IDs (OIDs), reserved words in a programming language, or X.500 91*b1cdbd2cSJim Jagielski Distinguished Names (DNs); thus, the concept of name and name space 92*b1cdbd2cSJim Jagielski should be broadly construed, and not limited to textual names. 93*b1cdbd2cSJim Jagielski 94*b1cdbd2cSJim Jagielski <p> 95*b1cdbd2cSJim Jagielski The requirements for such UUIDs are as follows: 96*b1cdbd2cSJim Jagielski 97*b1cdbd2cSJim Jagielski <ul> 98*b1cdbd2cSJim Jagielski <li> The UUIDs generated at different times from the same name in the 99*b1cdbd2cSJim Jagielski same namespace MUST be equal 100*b1cdbd2cSJim Jagielski 101*b1cdbd2cSJim Jagielski <li> The UUIDs generated from two different names in the same namespace 102*b1cdbd2cSJim Jagielski should be different (with very high probability) 103*b1cdbd2cSJim Jagielski 104*b1cdbd2cSJim Jagielski <li> The UUIDs generated from the same name in two different namespaces 105*b1cdbd2cSJim Jagielski should be different with (very high probability) 106*b1cdbd2cSJim Jagielski 107*b1cdbd2cSJim Jagielski <li> If two UUIDs that were generated from names are equal, then they 108*b1cdbd2cSJim Jagielski were generated from the same name in the same namespace (with very 109*b1cdbd2cSJim Jagielski high probability). 110*b1cdbd2cSJim Jagielski </ul> 111*b1cdbd2cSJim Jagielski 112*b1cdbd2cSJim Jagielski @param pTargetUUID pointer to at least 16 bytes of memory. After the call 113*b1cdbd2cSJim Jagielski it contains the newly generated uuid in network byte order. 114*b1cdbd2cSJim Jagielski @param pNameSpaceUUID The namespace uuid. Below are some predefined ones, 115*b1cdbd2cSJim Jagielski but any arbitray uuid can be used as namespace. 116*b1cdbd2cSJim Jagielski 117*b1cdbd2cSJim Jagielski @param pName the name 118*b1cdbd2cSJim Jagielski */ 119*b1cdbd2cSJim Jagielski void SAL_CALL rtl_createNamedUuid( 120*b1cdbd2cSJim Jagielski sal_uInt8 *pTargetUUID, 121*b1cdbd2cSJim Jagielski const sal_uInt8 *pNameSpaceUUID, 122*b1cdbd2cSJim Jagielski const rtl_String *pName 123*b1cdbd2cSJim Jagielski ); 124*b1cdbd2cSJim Jagielski 125*b1cdbd2cSJim Jagielski 126*b1cdbd2cSJim Jagielski 127*b1cdbd2cSJim Jagielski /* 128*b1cdbd2cSJim Jagielski Predefined Namespaces 129*b1cdbd2cSJim Jagielski (Use them the following way : sal_uInt8 aNsDNS[16]) = RTL_UUID_NAMESPACE_DNS; 130*b1cdbd2cSJim Jagielski */ 131*b1cdbd2cSJim Jagielski /** namesapce DNS 132*b1cdbd2cSJim Jagielski 133*b1cdbd2cSJim Jagielski <p> 134*b1cdbd2cSJim Jagielski (Use them the following way : sal_uInt8 aNsDNS[16]) = RTL_UUID_NAMESPACE_DNS; 135*b1cdbd2cSJim Jagielski <p> 136*b1cdbd2cSJim Jagielski 6ba7b810-9dad-11d1-80b4-00c04fd430c8 */ 137*b1cdbd2cSJim Jagielski #define RTL_UUID_NAMESPACE_DNS {\ 138*b1cdbd2cSJim Jagielski 0x6b,0xa7,0xb8,0x10,\ 139*b1cdbd2cSJim Jagielski 0x9d,0xad,\ 140*b1cdbd2cSJim Jagielski 0x11,0xd1,\ 141*b1cdbd2cSJim Jagielski 0x80, 0xb4, 0x00, 0xc0, 0x4f, 0xd4, 0x30, 0xc8\ 142*b1cdbd2cSJim Jagielski } 143*b1cdbd2cSJim Jagielski 144*b1cdbd2cSJim Jagielski /** namespace URL 145*b1cdbd2cSJim Jagielski 146*b1cdbd2cSJim Jagielski <p> 147*b1cdbd2cSJim Jagielski 6ba7b811-9dad-11d1-80b4-00c04fd430c8 */ 148*b1cdbd2cSJim Jagielski #define RTL_UUID_NAMESPACE_URL { \ 149*b1cdbd2cSJim Jagielski 0x6b, 0xa7, 0xb8, 0x11,\ 150*b1cdbd2cSJim Jagielski 0x9d, 0xad,\ 151*b1cdbd2cSJim Jagielski 0x11, 0xd1,\ 152*b1cdbd2cSJim Jagielski 0x80, 0xb4, 0x00, 0xc0, 0x4f, 0xd4, 0x30, 0xc8\ 153*b1cdbd2cSJim Jagielski } 154*b1cdbd2cSJim Jagielski 155*b1cdbd2cSJim Jagielski /** namespace oid 156*b1cdbd2cSJim Jagielski 157*b1cdbd2cSJim Jagielski <p> 158*b1cdbd2cSJim Jagielski 6ba7b812-9dad-11d1-80b4-00c04fd430c8 */ 159*b1cdbd2cSJim Jagielski #define RTL_UUID_NAMESPACE_OID {\ 160*b1cdbd2cSJim Jagielski 0x6b, 0xa7, 0xb8, 0x12,\ 161*b1cdbd2cSJim Jagielski 0x9d, 0xad,\ 162*b1cdbd2cSJim Jagielski 0x11, 0xd1,\ 163*b1cdbd2cSJim Jagielski 0x80, 0xb4, 0x00, 0xc0, 0x4f, 0xd4, 0x30, 0xc8\ 164*b1cdbd2cSJim Jagielski } 165*b1cdbd2cSJim Jagielski 166*b1cdbd2cSJim Jagielski /** namespace X500 167*b1cdbd2cSJim Jagielski 168*b1cdbd2cSJim Jagielski <p> 169*b1cdbd2cSJim Jagielski 6ba7b814-9dad-11d1-80b4-00c04fd430c8 */ 170*b1cdbd2cSJim Jagielski #define RTL_UUID_NAMESPACE_X500 {\ 171*b1cdbd2cSJim Jagielski 0x6b, 0xa7, 0xb8, 0x14,\ 172*b1cdbd2cSJim Jagielski 0x9d, 0xad,\ 173*b1cdbd2cSJim Jagielski 0x11, 0xd1,\ 174*b1cdbd2cSJim Jagielski 0x80, 0xb4, 0x00, 0xc0, 0x4f, 0xd4, 0x30, 0xc8\ 175*b1cdbd2cSJim Jagielski } 176*b1cdbd2cSJim Jagielski 177*b1cdbd2cSJim Jagielski 178*b1cdbd2cSJim Jagielski /* 179*b1cdbd2cSJim Jagielski This macro must have a value below the system time resolution of the 180*b1cdbd2cSJim Jagielski system. The uuid routines use this value as an upper limit for adding ticks to the 181*b1cdbd2cSJim Jagielski the predecessor time value if system times are equal. 182*b1cdbd2cSJim Jagielski */ 183*b1cdbd2cSJim Jagielski #ifdef SAL_W32 184*b1cdbd2cSJim Jagielski #define UUID_SYSTEM_TIME_RESOLUTION_100NS_TICKS 1000 185*b1cdbd2cSJim Jagielski #elif defined SAL_OS2 // YD we use posix functions for time 186*b1cdbd2cSJim Jagielski #define UUID_SYSTEM_TIME_RESOLUTION_100NS_TICKS 10 187*b1cdbd2cSJim Jagielski #elif LINUX 188*b1cdbd2cSJim Jagielski #define UUID_SYSTEM_TIME_RESOLUTION_100NS_TICKS 10 189*b1cdbd2cSJim Jagielski #elif NETBSD 190*b1cdbd2cSJim Jagielski #define UUID_SYSTEM_TIME_RESOLUTION_100NS_TICKS 10 191*b1cdbd2cSJim Jagielski #elif FREEBSD 192*b1cdbd2cSJim Jagielski #define UUID_SYSTEM_TIME_RESOLUTION_100NS_TICKS 10 193*b1cdbd2cSJim Jagielski #elif SOLARIS 194*b1cdbd2cSJim Jagielski #define UUID_SYSTEM_TIME_RESOLUTION_100NS_TICKS 10 195*b1cdbd2cSJim Jagielski #elif MACOSX 196*b1cdbd2cSJim Jagielski #define UUID_SYSTEM_TIME_RESOLUTION_100NS_TICKS 100000 197*b1cdbd2cSJim Jagielski #else 198*b1cdbd2cSJim Jagielski #error "System time resolution must be calculated!" 199*b1cdbd2cSJim Jagielski #endif 200*b1cdbd2cSJim Jagielski 201*b1cdbd2cSJim Jagielski #ifdef __cplusplus 202*b1cdbd2cSJim Jagielski } 203*b1cdbd2cSJim Jagielski #endif 204*b1cdbd2cSJim Jagielski 205*b1cdbd2cSJim Jagielski #endif 206