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/* -*- 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 .
*/
#include <string.h>
#include <osl/interlck.h>
#include <rtl/strbuf.hxx>
#include "strimp.hxx"
/*************************************************************************
* rtl_stringbuffer_newFromStr_WithLength
*/
void SAL_CALL rtl_stringbuffer_newFromStr_WithLength( rtl_String ** newStr,
const char * value,
sal_Int32 count )
{
assert(newStr);
assert(count >= 0);
if (!value)
{
rtl_string_new_WithLength( newStr, 16 );
return;
}
// use raw alloc to avoid overwriting the buffer twice
if ( *newStr)
rtl_string_release( *newStr );
*newStr = rtl_string_ImplAlloc( count + 16 );
(*newStr)->length = count;
memcpy( (*newStr)->buffer, value, count );
memset( (*newStr)->buffer + count, 0, 16 );
}
/*************************************************************************
* rtl_stringbuffer_newFromStringBuffer
*/
sal_Int32 SAL_CALL rtl_stringbuffer_newFromStringBuffer( rtl_String ** newStr,
sal_Int32 capacity,
rtl_String * oldStr )
{
assert(newStr);
assert(oldStr);
assert(capacity >= 0);
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;
memcpy( (*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)
{
assert(This);
// assert(capacity && *capacity >= 0);
// assert(minimumCapacity >= 0);
if (minimumCapacity <= *capacity)
return;
rtl_String * pTmp = *This;
rtl_String * pNew = nullptr;
auto nLength = (*This)->length;
*capacity = (nLength + 1) * 2;
if (minimumCapacity > *capacity)
/* still lower, set to the minimum capacity */
*capacity = minimumCapacity;
// use raw alloc to avoid overwriting the buffer twice
pNew = rtl_string_ImplAlloc( *capacity );
pNew->length = nLength;
*This = pNew;
memcpy( (*This)->buffer, pTmp->buffer, nLength );
memset( (*This)->buffer + nLength, 0, *capacity - nLength );
rtl_string_release( pTmp );
}
/*************************************************************************
* rtl_stringbuffer_insert
*/
void SAL_CALL rtl_stringbuffer_insert( rtl_String ** This,
sal_Int32 * capacity,
sal_Int32 offset,
const char * str,
sal_Int32 len )
{
assert(This);
assert(capacity && *capacity >= 0);
assert(offset >= 0 && offset <= (**This).length);
assert(len >= 0);
sal_Int32 nOldLen;
char * pBuf;
sal_Int32 n;
if( len == 0 )
return;
if (*capacity < (*This)->length + len)
rtl_stringbuffer_ensureCapacity( This, capacity, (*This)->length + len );
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 )
memmove( pBuf + offset + len, pBuf + offset, n * sizeof(char) );
/* insert the new characters */
if( str != nullptr )
{
if( len == 1 )
/* optimized for 1 character */
pBuf[offset] = *str;
else
memcpy( pBuf + offset, str, len * sizeof(char) );
}
(*This)->length = nOldLen + len;
pBuf[ nOldLen + len ] = 0;
}
/*************************************************************************
* rtl_stringbuffer_remove
*/
void SAL_CALL rtl_stringbuffer_remove( rtl_String ** This,
sal_Int32 start,
sal_Int32 len )
{
assert(This);
assert(start >= 0 && start <= (**This).length);
assert(len >= 0);
sal_Int32 nTailLen;
char * pBuf;
if (len > (*This)->length - start)
len = (*This)->length - start;
//remove nothing
if (!len)
return;
pBuf = (*This)->buffer;
nTailLen = (*This)->length - ( start + len );
if (nTailLen)
{
/* move the tail */
memmove(pBuf + start, pBuf + start + len, nTailLen * sizeof(char));
}
(*This)->length-=len;
pBuf[ (*This)->length ] = 0;
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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