xref: /AOO41X/main/sal/rtl/source/strbuf.c (revision cdf0e10c4e3984b49a9502b011690b615761d4a3)

/*************************************************************************
 *
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * Copyright 2000, 2010 Oracle and/or its affiliates.
 *
 * OpenOffice.org - a multi-platform office productivity suite
 *
 * This file is part of OpenOffice.org.
 *
 * OpenOffice.org is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License version 3
 * only, as published by the Free Software Foundation.
 *
 * OpenOffice.org is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License version 3 for more details
 * (a copy is included in the LICENSE file that accompanied this code).
 *
 * You should have received a copy of the GNU Lesser General Public License
 * version 3 along with OpenOffice.org.  If not, see
 * <http://www.openoffice.org/license.html>
 * for a copy of the LGPLv3 License.
 *
 ************************************************************************/

#include <osl/interlck.h>

#ifndef _RTL_STRING_HXX_
#include <rtl/strbuf.hxx>
#endif
#include <rtl/memory.h>

/*
#include <rtl/alloc.h>
*/



/*************************************************************************
 *	rtl_stringbuffer_newFromStr_WithLength
 */
void SAL_CALL rtl_stringbuffer_newFromStr_WithLength( rtl_String ** newStr,
													  const sal_Char * value,
													  sal_Int32 count )
{
	if (!value)
	{
		rtl_string_new_WithLength( newStr, 16 );
		return;
	}

	rtl_string_new_WithLength( newStr, count + 16 );
	(*newStr)->length = count;
	rtl_copyMemory( (*newStr)->buffer, value, count );
	return;
}

/*************************************************************************
 *	rtl_stringbuffer_newFromStringBuffer
 */
sal_Int32 SAL_CALL rtl_stringbuffer_newFromStringBuffer( rtl_String ** newStr,
														 sal_Int32 capacity,
													     rtl_String * oldStr )
{
	sal_Int32 newCapacity = capacity;

	if (newCapacity < oldStr->length)
		newCapacity = oldStr->length;

	rtl_string_new_WithLength( newStr, newCapacity );
    if (oldStr->length > 0) {
        (*newStr)->length = oldStr->length;
        rtl_copyMemory( (*newStr)->buffer, oldStr->buffer, oldStr->length );
    }
	return newCapacity;
}

/*************************************************************************
 *	rtl_stringbuffer_ensureCapacity
 */
void SAL_CALL rtl_stringbuffer_ensureCapacity
	(rtl_String ** This, sal_Int32* capacity, sal_Int32 minimumCapacity)
{
	if (minimumCapacity > *capacity)
	{
		rtl_String * pTmp = *This;
		rtl_String * pNew = NULL;
		*capacity = ((*This)->length + 1) * 2;
		if (minimumCapacity > *capacity)
			/* still lower, set to the minimum capacity */
			*capacity = minimumCapacity;

		rtl_string_new_WithLength(&pNew, *capacity);
		pNew->length = (*This)->length;
		*This = pNew;

		rtl_copyMemory( (*This)->buffer, pTmp->buffer, pTmp->length );
		rtl_string_release( pTmp );
	}
}

/*************************************************************************
 *	rtl_stringbuffer_insert
 */
void SAL_CALL rtl_stringbuffer_insert( rtl_String ** This,
									   sal_Int32 * capacity,
									   sal_Int32 offset,
									   const sal_Char * str,
									   sal_Int32 len )
{
	sal_Int32 nOldLen;
	sal_Char * pBuf;
	sal_Int32 n;
	if( len != 0 )
	{
		if (*capacity < (*This)->length + len)
			rtl_stringbuffer_ensureCapacity( This, capacity, (*This)->length + len );

		/*
		if( len == 1 )
			This->buffer
		*/
		nOldLen = (*This)->length;
		pBuf = (*This)->buffer;

		/* copy the tail */
		n = (nOldLen - offset);
		if( n == 1 )
            /* optimized for 1 character */
			pBuf[offset + len] = pBuf[offset];
		else if( n > 1 )
			rtl_moveMemory( pBuf + offset + len, pBuf + offset, n * sizeof(sal_Char) );

		/* insert the new characters */
		n = len;
		if( len == 1 )
                            /* optimized for 1 character */
			pBuf[offset] = *str;
		else if( n > 1 )
			rtl_copyMemory( pBuf + offset, str, len * sizeof(sal_Char) );
		(*This)->length = nOldLen + len;
		pBuf[ nOldLen + len ] = 0;
	}
}