/
SlpkExtractor.cpp
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/
SlpkExtractor.cpp
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/******************************************************************************
* Copyright (c) 2018, Hobu Inc. (info@hobu.co)
*
* 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 Hobu, Inc. or Flaxen Geo Consulting 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 <fstream>
#include <pdal/util/IStream.hpp>
#include <pdal/util/FileUtils.hpp>
#include "SlpkExtractor.hpp"
namespace pdal
{
#pragma pack(1)
struct zheader
{
uint16_t m_version;
uint16_t m_purpose;
uint16_t m_compression;
uint32_t m_time;
uint32_t m_crc;
uint32_t m_compressedSize;
uint32_t m_uncompressedSize;
uint16_t m_nameLen;
uint16_t m_extraLen;
};
#pragma pack()
void SlpkExtractor::extract() const
{
if (!FileUtils::directoryExists(m_directory))
throw slpk_error("Output directory doesn't exist.");
ILeStream in(m_filename);
zheader h;
std::string name;
std::vector<char> extra;
int32_t magic;
in.get(reinterpret_cast<char *>(&magic), sizeof(magic));
while (magic == 0x04034b50)
{
in >> h.m_version;
in >> h.m_purpose;
in >> h.m_compression;
in >> h.m_time;
in >> h.m_crc;
in >> h.m_compressedSize;
in >> h.m_uncompressedSize;
in >> h.m_nameLen;
in >> h.m_extraLen;
in.get(name, h.m_nameLen);
if (h.m_extraLen)
{
extra.resize(h.m_extraLen);
in.get(extra);
}
if (h.m_compression != 0)
throw slpk_error("Found compressed file in slpk archive.");
if (h.m_compressedSize != h.m_uncompressedSize)
throw slpk_error("Compressed and uncompressed sizes don't match "
"in slpk archive.");
writeFile(name, in, h.m_compressedSize);
in.get(reinterpret_cast<char *>(&magic), sizeof(magic));
}
}
void SlpkExtractor::writeFile(std::string filename, ILeStream& in,
size_t count) const
{
std::string dir = FileUtils::getDirectory(filename);
dir = m_directory + "/" + dir;
if (dir.size())
FileUtils::createDirectories(dir);
filename = m_directory + "/" + filename;
std::ofstream out(filename, std::ios_base::out | std::ios_base::binary);
if (!out)
throw slpk_error("Couldn't open output file '" + filename + "'.");
const size_t bufsize(100000);
char buf[bufsize];
while (count)
{
size_t size = std::min(bufsize, count);
in.get(buf, size);
out.write(buf, size);
count -= size;
}
}
} //namespace pdal