buffer.cpp
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- /* ***** BEGIN LICENSE BLOCK *****
- * Source last modified: $Id: buffer.cpp,v 1.4.32.3 2004/07/09 01:45:59 hubbe Exp $
- *
- * Portions Copyright (c) 1995-2004 RealNetworks, Inc. All Rights Reserved.
- *
- * The contents of this file, and the files included with this file,
- * are subject to the current version of the RealNetworks Public
- * Source License (the "RPSL") available at
- * http://www.helixcommunity.org/content/rpsl unless you have licensed
- * the file under the current version of the RealNetworks Community
- * Source License (the "RCSL") available at
- * http://www.helixcommunity.org/content/rcsl, in which case the RCSL
- * will apply. You may also obtain the license terms directly from
- * RealNetworks. You may not use this file except in compliance with
- * the RPSL or, if you have a valid RCSL with RealNetworks applicable
- * to this file, the RCSL. Please see the applicable RPSL or RCSL for
- * the rights, obligations and limitations governing use of the
- * contents of the file.
- *
- * Alternatively, the contents of this file may be used under the
- * terms of the GNU General Public License Version 2 or later (the
- * "GPL") in which case the provisions of the GPL are applicable
- * instead of those above. If you wish to allow use of your version of
- * this file only under the terms of the GPL, and not to allow others
- * to use your version of this file under the terms of either the RPSL
- * or RCSL, indicate your decision by deleting the provisions above
- * and replace them with the notice and other provisions required by
- * the GPL. If you do not delete the provisions above, a recipient may
- * use your version of this file under the terms of any one of the
- * RPSL, the RCSL or the GPL.
- *
- * This file is part of the Helix DNA Technology. RealNetworks is the
- * developer of the Original Code and owns the copyrights in the
- * portions it created.
- *
- * This file, and the files included with this file, is distributed
- * and made available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY
- * KIND, EITHER EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS
- * ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES
- * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET
- * ENJOYMENT OR NON-INFRINGEMENT.
- *
- * Technology Compatibility Kit Test Suite(s) Location:
- * http://www.helixcommunity.org/content/tck
- *
- * Contributor(s):
- *
- * ***** END LICENSE BLOCK ***** */
- #include "hlxclib/stdio.h"
- #include "hlxclib/stdlib.h"
- #include "hlxclib/string.h"
- #include "hxtypes.h"
- #include "hxassert.h"
- #include "buffer.h"
- #include "hxheap.h"
- #ifdef _DEBUG
- #undef HX_THIS_FILE
- static const char HX_THIS_FILE[] = __FILE__;
- #endif
- Buffer::Buffer() {
- refcount = 0;
- }
- Buffer::~Buffer()
- {
- if (base) delete[] base;
- HX_ASSERT(refcount == 0);
- }
- /*
- * Ensure that required number of contiguous bytes is
- * available (in preparation for storing a large object,
- * part of which may have already been buffered).
- */
- void
- WrapBuffer::ensure(int required) {
- int count;
- if (limit - data >= required)
- return;
- count = space - data;
- if (limit < base + required) {
- Byte* newbase = new Byte[required];
- memmove(newbase, data, count);
- delete[] base;
- base = newbase;
- limit = base + required;
- } else {
- memmove(base, data, count);
- }
- data = base;
- space = data + count;
- }
- void
- WrapBuffer::ensure_space(int required) {
- if (limit - space >= required)
- return;
- ensure(required + count());
- }
- void
- GrowBuffer::grow(int s) {
- Byte* newbase;
- int count;
- count = used();
- newbase = new Byte[s];
- memcpy(newbase, base, (count <= s ? count : s)); /* Flawfinder: ignore */
- delete[] base;
- base = newbase;
- limit = base + s;
- data = base;
- space = base + count;
- }
- void
- GrowBuffer::ensure_space(int required) {
- if (limit - space >= required)
- return;
- int s = used() + required;
- /*
- * Try to reduce the amount of copying required
- */
- grow(s*2);
- }