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/*! \file stringbuf.c
* \brief Implemetation of the dynamic string buffer helper object.
*
* \author Rainer Gerhards <rgerhards@adiscon.com>
* \date 2003-08-08
* Initial version begun.
*
* Copyright 2002-2003
* Rainer Gerhards and Adiscon GmbH. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* * Neither the name of Adiscon GmbH or Rainer Gerhards
* nor the names of its contributors may be used to
* endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
* OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <malloc.h>
#include <assert.h>
#include <string.h>
#include "liblogging-stub.h"
#include "stringbuf.h"
#include "srUtils.h"
/* ################################################################# *
* private members *
* ################################################################# */
/* ################################################################# *
* public members *
* ################################################################# */
sbStrBObj *sbStrBConstruct(void)
{
sbStrBObj *pThis;
if((pThis = (sbStrBObj*) calloc(1, sizeof(sbStrBObj))) == NULL)
return NULL;
pThis->OID = OIDsbStrB;
pThis->pBuf = NULL;
pThis->iBufSize = 0;
pThis->iBufPtr = 0;
pThis->iAllocIncrement = STRINGBUF_ALLOC_INCREMENT;
return pThis;
}
void sbStrBDestruct(sbStrBObj *pThis)
{
# if STRINGBUF_TRIM_ALLOCSIZE == 1
/* in this mode, a new buffer already was allocated,
* so we need to free the old one.
*/
if(pThis->pBuf != NULL)
free(pThis->pBuf);
# endif
SRFREEOBJ(pThis);
}
srRetVal sbStrBAppendStr(sbStrBObj *pThis, char* psz)
{
srRetVal iRet;
sbSTRBCHECKVALIDOBJECT(pThis);
assert(psz != NULL);
while(*psz)
if((iRet = sbStrBAppendChar(pThis, *psz++)) != SR_RET_OK)
return iRet;
return SR_RET_OK;
}
srRetVal sbStrBAppendInt(sbStrBObj *pThis, int i)
{
srRetVal iRet;
char szBuf[32];
sbSTRBCHECKVALIDOBJECT(pThis);
if((iRet = srUtilItoA(szBuf, sizeof(szBuf), i)) != SR_RET_OK)
return iRet;
return sbStrBAppendStr(pThis, szBuf);
}
srRetVal sbStrBAppendChar(sbStrBObj *pThis, char c)
{
char* pNewBuf;
sbSTRBCHECKVALIDOBJECT(pThis);
if(pThis->iBufPtr >= pThis->iBufSize)
{ /* need more memory! */
if((pNewBuf = (char*) malloc((pThis->iBufSize + pThis->iAllocIncrement) * sizeof(char))) == NULL)
return SR_RET_OUT_OF_MEMORY;
memcpy(pNewBuf, pThis->pBuf, pThis->iBufSize);
pThis->iBufSize += pThis->iAllocIncrement;
if(pThis->pBuf != NULL)
free(pThis->pBuf);
pThis->pBuf = pNewBuf;
}
/* ok, when we reach this, we have sufficient memory */
*(pThis->pBuf + pThis->iBufPtr++) = c;
return SR_RET_OK;
}
char* sbStrBFinish(sbStrBObj *pThis)
{
char* pRetBuf;
sbSTRBCHECKVALIDOBJECT(pThis);
sbStrBAppendChar(pThis, '\0');
# if STRINGBUF_TRIM_ALLOCSIZE == 1
/* in this mode, we need to trim the string. To do
* so, we must allocate a new buffer of the exact
* string size, and then copy the old one over.
* This new buffer is then to be returned.
*/
if((pRetBuf = malloc((pThis->iBufSize + 1) * sizeof(char))) == NULL)
{ /* OK, in this case we use the previous buffer. At least
* we have it ;)
*/
pRetBuf = pThis->pBuf;
}
else
{ /* got the new buffer, so let's use it */
memcpy(pRetBuf, pThis->pBuf, pThis->iBufPtr + 1);
}
# else
/* here, we can simply return a pointer to the
* currently existing buffer. We don't care about
* the extra memory, as we achieve a big performance
* gain.
*/
pRetBuf = pThis->pBuf;
# endif
sbStrBDestruct(pThis);
return(pRetBuf);
}
void sbStrBSetAllocIncrement(sbStrBObj *pThis, int iNewIncrement)
{
sbSTRBCHECKVALIDOBJECT(pThis);
assert(iNewIncrement > 0);
pThis->iAllocIncrement = iNewIncrement;
}
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