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| -rw-r--r-- | include/rtl/uuid.h | 182 |
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diff --git a/include/rtl/uuid.h b/include/rtl/uuid.h new file mode 100644 index 000000000..61fd8461e --- /dev/null +++ b/include/rtl/uuid.h @@ -0,0 +1,182 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * This file incorporates work covered by the following license notice: + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed + * with this work for additional information regarding copyright + * ownership. The ASF licenses this file to you under the Apache + * License, Version 2.0 (the "License"); you may not use this file + * except in compliance with the License. You may obtain a copy of + * the License at http://www.apache.org/licenses/LICENSE-2.0 . + */ +#ifndef INCLUDED_RTL_UUID_H +#define INCLUDED_RTL_UUID_H + +#include "sal/config.h" + +#include "rtl/string.h" +#include "sal/saldllapi.h" +#include "sal/types.h" + +/** + @file + Specification (from draft-leach-uuids-guids-01.txt ) + + <p> + A UUID is an identifier that is unique across both space and time, + with respect to the space of all UUIDs. To be precise, the UUID + consists of a finite bit space. Thus, collision cannot be avoided in + principle. A UUID can be used for multiple purposes, from tagging objects + with an extremely short lifetime, to reliably identifying very persistent + objects across a network. + + <p> + The generation of UUIDs does not require that a registration + authority be contacted for each identifier. Instead, Version 4 UUIDs are + generated from (pseudo unique) sequences of (pseudo) random bits. + */ + +#ifdef __cplusplus +extern "C" { +#endif + +/** Generates a new Version 4 (random number based) UUID (Universally Unique + IDentifier). + + @param pTargetUUID pointer to at least 16 bytes of memory. After the call it contains + the newly generated uuid in network byte order. + @param pPredecessorUUID ignored (was used when this function returned + Version 1 instead of Version 4 UUIDs). + @param bUseEthernetAddress ignored (was used when this function returned + Version 1 instead of Version 4 UUIDs). + */ +SAL_DLLPUBLIC void SAL_CALL rtl_createUuid( + sal_uInt8 *pTargetUUID, + const sal_uInt8 *pPredecessorUUID, + sal_Bool bUseEthernetAddress ); + +/** Compare two UUID's lexically + + <p> + Note: lexical ordering is not temporal ordering! + <p> + Note: For equalnesschecking, a memcmp(pUUID1,pUUID2,16) is more efficient + + @return + <ul> + <li>-1 u1 is lexically before u2 + <li>0 u1 is equal to u2 + <li>1 u1 is lexically after u2 + </ul> + + */ +SAL_DLLPUBLIC sal_Int32 SAL_CALL rtl_compareUuid( + const sal_uInt8 *pUUID1 , const sal_uInt8 *pUUID2 ); + +/** Creates named UUIDs. + + <p> + The version 3 UUID is meant for generating UUIDs from <em>names</em> that + are drawn from, and unique within, some <em>name space</em>. Some examples + of names (and, implicitly, name spaces) might be DNS names, URLs, ISO + Object IDs (OIDs), reserved words in a programming language, or X.500 + Distinguished Names (DNs); thus, the concept of name and name space + should be broadly construed, and not limited to textual names. + + <p> + The requirements for such UUIDs are as follows: + + <ul> + <li> The UUIDs generated at different times from the same name in the + same namespace MUST be equal + + <li> The UUIDs generated from two different names in the same namespace + should be different (with very high probability) + + <li> The UUIDs generated from the same name in two different namespaces + should be different with (very high probability) + + <li> If two UUIDs that were generated from names are equal, then they + were generated from the same name in the same namespace (with very + high probability). + </ul> + + @param pTargetUUID pointer to at least 16 bytes of memory. After the call + it contains the newly generated uuid in network byte order. + @param pNameSpaceUUID The namespace uuid. Below are some predefined ones, + but any arbitrary uuid can be used as namespace. + + @param pName the name + */ +SAL_DLLPUBLIC void SAL_CALL rtl_createNamedUuid( + sal_uInt8 *pTargetUUID, + const sal_uInt8 *pNameSpaceUUID, + const rtl_String *pName + ); + + + +/* + Predefined Namespaces + (Use them the following way : sal_uInt8 aNsDNS[16]) = RTL_UUID_NAMESPACE_DNS; + */ +/** namespace DNS + + <p> + (Use them the following way : sal_uInt8 aNsDNS[16]) = RTL_UUID_NAMESPACE_DNS; + <p> + 6ba7b810-9dad-11d1-80b4-00c04fd430c8 */ +#define RTL_UUID_NAMESPACE_DNS {\ + 0x6b,0xa7,0xb8,0x10,\ + 0x9d,0xad,\ + 0x11,0xd1,\ + 0x80, 0xb4, 0x00, 0xc0, 0x4f, 0xd4, 0x30, 0xc8\ + } + +/** namespace URL + + <p> + 6ba7b811-9dad-11d1-80b4-00c04fd430c8 */ +#define RTL_UUID_NAMESPACE_URL { \ + 0x6b, 0xa7, 0xb8, 0x11,\ + 0x9d, 0xad,\ + 0x11, 0xd1,\ + 0x80, 0xb4, 0x00, 0xc0, 0x4f, 0xd4, 0x30, 0xc8\ + } + +/** namespace oid + + <p> + 6ba7b812-9dad-11d1-80b4-00c04fd430c8 */ +#define RTL_UUID_NAMESPACE_OID {\ + 0x6b, 0xa7, 0xb8, 0x12,\ + 0x9d, 0xad,\ + 0x11, 0xd1,\ + 0x80, 0xb4, 0x00, 0xc0, 0x4f, 0xd4, 0x30, 0xc8\ + } + +/** namespace X500 + + <p> + 6ba7b814-9dad-11d1-80b4-00c04fd430c8 */ +#define RTL_UUID_NAMESPACE_X500 {\ + 0x6b, 0xa7, 0xb8, 0x14,\ + 0x9d, 0xad,\ + 0x11, 0xd1,\ + 0x80, 0xb4, 0x00, 0xc0, 0x4f, 0xd4, 0x30, 0xc8\ + } + +#ifdef __cplusplus +} +#endif + +#endif + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |