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157 lines
9.1 KiB
157 lines
9.1 KiB
4 years ago
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/***************************************************************************/
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/* */
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/* Project: OpenSLP - OpenSource implementation of Service Location */
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/* Protocol */
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/* */
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/* File: slp_buffer.h */
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/* */
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/* Abstract: Header file that defines structures and constants and */
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/* functions that are used to handle memory allocation for */
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/* slp message buffers. */
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/* */
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/*-------------------------------------------------------------------------*/
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/* */
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/* Please submit patches to http://www.openslp.org */
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/* */
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/*-------------------------------------------------------------------------*/
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/* */
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/* Copyright (C) 2000 Caldera Systems, Inc */
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/* All rights reserved. */
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/* */
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/* Redistribution and use in source and binary forms, with or without */
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/* modification, are permitted provided that the following conditions are */
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/* met: */
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/* */
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/* Redistributions of source code must retain the above copyright */
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/* notice, this list of conditions and the following disclaimer. */
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/* */
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/* Redistributions in binary form must reproduce the above copyright */
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/* notice, this list of conditions and the following disclaimer in */
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/* the documentation and/or other materials provided with the */
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/* distribution. */
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/* */
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/* Neither the name of Caldera Systems nor the names of its */
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/* contributors may be used to endorse or promote products derived */
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/* from this software without specific prior written permission. */
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/* */
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/* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS */
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/* `AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT */
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/* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR */
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/* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE CALDERA */
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/* SYSTEMS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, */
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/* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT */
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/* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, */
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/* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON */
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/* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT */
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/* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE */
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/* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
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/* */
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/***************************************************************************/
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#if(!defined SLP_BUFFER_H_INCLUDED)
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#define SLP_BUFFER_H_INCLUDED
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#include <stdlib.h>
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#include <memory.h>
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#include "slp_linkedlist.h"
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/*=========================================================================*/
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typedef struct _SLPBuffer
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/*=========================================================================*/
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{
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SLPListItem listitem;
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/* SLPListItem so that SLPBuffers can be linked into a list*/
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/* the allocated size of this buffer (the actual xmalloc'd size is
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one byte more than this to null terminate C strings) */
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size_t allocated;
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unsigned char* start;
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/* ALWAYS points to the start of the xmalloc() buffer */
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unsigned char* curpos;
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/* "slider" pointer. Range is ALWAYS (start < curpos < end) */
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unsigned char* end;
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/* ALWAYS set to point to the byte after the last meaningful byte */
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/* Data beyond this index may not be valid */
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}*SLPBuffer;
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/*=========================================================================*/
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SLPBuffer SLPBufferAlloc(size_t size);
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/* Must be called to initially allocate a SLPBuffer */
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/* */
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/* size - (IN) number of bytes to allocate */
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/* */
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/* returns - newly allocated SLPBuffer or NULL on ENOMEM. An extra byte */
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/* is allocated to null terminating strings. This extra byte */
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/* is not counted in the buffer size */
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/*=========================================================================*/
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/*=========================================================================*/
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SLPBuffer SLPBufferRealloc(SLPBuffer buf, size_t size);
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/* Must be called to initially allocate a SLPBuffer */
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/* */
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/* size - (IN) number of bytes to allocate */
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/* */
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/* returns - newly (re)allocated SLPBuffer or NULL on ENOMEM. An extra */
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/* byte is allocated to null terminating strings. This extra */
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/* byte is not counted in the buffer size */
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/*=========================================================================*/
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/*=========================================================================*/
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SLPBuffer SLPBufferDup(SLPBuffer buf);
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/* Returns a duplicate buffer. Duplicate buffer must be freed by a call */
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/* to SLPBufferFree() */
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/* */
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/* size - (IN) number of bytes to allocate */
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/* */
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/* returns - a newly allocated SLPBuffer or NULL on ENOMEM */
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/*=========================================================================*/
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/*=========================================================================*/
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void SLPBufferFree(SLPBuffer buf);
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/* Free a previously allocated SLPBuffer */
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/* */
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/* msg - (IN) the SLPBuffer to free */
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/* */
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/* returns - none */
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/*=========================================================================*/
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/*=========================================================================*/
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SLPBuffer SLPBufferListRemove(SLPBuffer* list, SLPBuffer buf);
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/* Removed the specified SLPBuffer from a SLPBuffer list */
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/* */
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/* list (IN/OUT) pointer to the list */
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/* */
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/* buf (IN) buffer to remove */
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/* */
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/* Returns the previous item in the list (may be NULL) */
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/*=========================================================================*/
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/*=========================================================================*/
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SLPBuffer SLPBufferListAdd(SLPBuffer* list, SLPBuffer buf);
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/* Add the specified SLPBuffer from a SLPBuffer list */
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/* */
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/* list (IN/OUT) pointer to the list */
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/* */
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/* buf (IN) buffer to add */
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/* */
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/* Returns the added item in the list. */
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/*=========================================================================*/
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/*=========================================================================*/
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void* memdup(const void* src, int srclen);
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/*=========================================================================*/
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#endif
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