Noel Grandin
0caf06c8fa
ever since
commit b410749d30
Author: Akshay Kumar Dubey <akshaymani513@gmail.com>
Date: Wed Apr 16 02:05:16 2025 +0530
tdf#137308 - Add zstd build support and decompression classes
Change-Id: Ib67a2ef523ce6596b562633b0da081ba56d3ff6f
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/185411
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
94 lines
2.4 KiB
C++
94 lines
2.4 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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#include <package/InflateZstd.hxx>
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#include <string.h>
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using namespace com::sun::star::uno;
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using namespace ZipUtils;
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InflateZstd::InflateZstd(bool)
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: bFinished(false)
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, nLastInflateError(0)
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, pDCtx(ZSTD_createDCtx())
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, bStreamInitialized(false)
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{
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if (!pDCtx)
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{
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nLastInflateError = static_cast<sal_Int32>(ZSTD_error_memory_allocation);
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}
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inBuffer = { nullptr, 0, 0 };
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}
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InflateZstd::~InflateZstd() { end(); }
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void InflateZstd::setInput(const Sequence<sal_Int8>& rBuffer)
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{
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if (!pDCtx)
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{
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bStreamInitialized = false;
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return;
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}
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sInBuffer = rBuffer;
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inBuffer.src = sInBuffer.getConstArray();
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inBuffer.size = sInBuffer.getLength();
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inBuffer.pos = 0;
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bStreamInitialized = true;
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}
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sal_Int32 InflateZstd::doInflateSegment(Sequence<sal_Int8>& rBuffer, sal_Int32 nNewOffset,
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sal_Int32 nNewLength)
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{
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if (nNewOffset < 0 || nNewLength < 0 || nNewOffset + nNewLength > rBuffer.getLength())
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return 0;
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return doInflateBytes(rBuffer, nNewOffset, nNewLength);
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}
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void InflateZstd::end()
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{
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if (pDCtx)
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{
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ZSTD_freeDCtx(pDCtx);
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pDCtx = nullptr;
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}
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bStreamInitialized = false;
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inBuffer = { nullptr, 0, 0 };
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}
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sal_Int32 InflateZstd::doInflateBytes(Sequence<sal_Int8>& rBuffer, sal_Int32 nNewOffset,
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sal_Int32 nNewLength)
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{
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if (bFinished)
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{
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return 0;
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}
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if (!pDCtx || !bStreamInitialized)
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{
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nLastInflateError = 1;
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return 0;
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}
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nLastInflateError = 0;
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ZSTD_outBuffer outBuffer
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= { rBuffer.getArray() + nNewOffset, static_cast<size_t>(nNewLength), 0 };
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size_t ret = ZSTD_decompressStream(pDCtx, &outBuffer, &inBuffer);
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if (ZSTD_isError(ret))
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{
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nLastInflateError = static_cast<sal_Int32>(ret);
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ZSTD_DCtx_reset(pDCtx, ZSTD_reset_session_only);
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return 0;
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}
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if (ret == 0)
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bFinished = true;
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return static_cast<sal_Int32>(outBuffer.pos);
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}
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/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */
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