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102 lines
2.6 KiB
C
102 lines
2.6 KiB
C
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/* $Id$ */
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/*
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* Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com)
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* Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef __PJ_GUID_H__
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#define __PJ_GUID_H__
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/**
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* @file guid.h
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* @brief GUID Globally Unique Identifier.
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*/
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#include <pj/types.h>
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PJ_BEGIN_DECL
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/**
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* @defgroup PJ_DS Data Structure.
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*/
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/**
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* @defgroup PJ_GUID Globally Unique Identifier
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* @ingroup PJ_DS
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* @{
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*
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* This module provides API to create string that is globally unique.
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* If application doesn't require that strong requirement, it can just
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* use #pj_create_random_string() instead.
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*/
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/**
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* PJ_GUID_STRING_LENGTH specifies length of GUID string. The value is
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* dependent on the algorithm used internally to generate the GUID string.
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* If real GUID generator is used, then the length will be between 32 and
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* 36 bytes. Application should not assume which algorithm will
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* be used by GUID generator.
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*
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* Regardless of the actual length of the GUID, it will not exceed
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* PJ_GUID_MAX_LENGTH characters.
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*
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* @see pj_GUID_STRING_LENGTH()
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* @see PJ_GUID_MAX_LENGTH
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*/
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PJ_DECL_DATA(const unsigned) PJ_GUID_STRING_LENGTH;
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/**
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* Get #PJ_GUID_STRING_LENGTH constant.
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*/
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PJ_DECL(unsigned) pj_GUID_STRING_LENGTH(void);
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/**
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* PJ_GUID_MAX_LENGTH specifies the maximum length of GUID string,
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* regardless of which algorithm to use.
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*/
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#define PJ_GUID_MAX_LENGTH 36
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/**
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* Create a globally unique string, which length is PJ_GUID_STRING_LENGTH
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* characters. Caller is responsible for preallocating the storage used
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* in the string.
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*
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* @param str The string to store the result.
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*
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* @return The string.
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*/
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PJ_DECL(pj_str_t*) pj_generate_unique_string(pj_str_t *str);
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/**
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* Generate a unique string.
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*
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* @param pool Pool to allocate memory from.
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* @param str The string.
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*/
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PJ_DECL(void) pj_create_unique_string(pj_pool_t *pool, pj_str_t *str);
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/**
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* @}
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*/
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PJ_END_DECL
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#endif/* __PJ_GUID_H__ */
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