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101 lines (80 loc) · 2.13 KB
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//
// ZipArchiveInfo.cpp
//
// $Id: //poco/1.4/Zip/src/ZipArchiveInfo.cpp#1 $
//
// Library: Zip
// Package: Zip
// Module: ZipArchiveInfo
//
// Copyright (c) 2007, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
//
#include "Poco/Zip/ZipArchiveInfo.h"
#include "Poco/Zip/ZipException.h"
#include "Poco/Buffer.h"
#include <istream>
#include <cstring>
namespace Poco {
namespace Zip {
const char ZipArchiveInfo::HEADER[ZipCommon::HEADER_SIZE] = {'\x50', '\x4b', '\x05', '\x06'};
ZipArchiveInfo::ZipArchiveInfo(std::istream& in, bool assumeHeaderRead):
_rawInfo(),
_startPos(in.tellg()),
_comment()
{
if (assumeHeaderRead)
_startPos -= ZipCommon::HEADER_SIZE;
parse(in, assumeHeaderRead);
}
ZipArchiveInfo::ZipArchiveInfo():
_rawInfo(),
_startPos(0),
_comment()
{
std::memset(_rawInfo, 0, FULLHEADER_SIZE);
std::memcpy(_rawInfo, HEADER, ZipCommon::HEADER_SIZE);
}
ZipArchiveInfo::~ZipArchiveInfo()
{
}
void ZipArchiveInfo::parse(std::istream& inp, bool assumeHeaderRead)
{
if (!assumeHeaderRead)
{
inp.read(_rawInfo, ZipCommon::HEADER_SIZE);
}
else
{
std::memcpy(_rawInfo, HEADER, ZipCommon::HEADER_SIZE);
}
poco_assert (std::memcmp(_rawInfo, HEADER, ZipCommon::HEADER_SIZE) == 0);
// read the rest of the header
inp.read(_rawInfo + ZipCommon::HEADER_SIZE, FULLHEADER_SIZE - ZipCommon::HEADER_SIZE);
Poco::UInt16 len = getZipCommentSize();
if (len > 0)
{
Poco::Buffer<char> buf(len);
inp.read(buf.begin(), len);
_comment = std::string(buf.begin(), len);
}
}
std::string ZipArchiveInfo::createHeader() const
{
std::string result(_rawInfo, FULLHEADER_SIZE);
result.append(_comment);
return result;
}
void ZipArchiveInfo::setZipComment(const std::string& comment)
{
// Confirm string is of valid size
if (comment.size() > 65535)
throw ZipException("Maximum number of entries for a ZIP file reached: 65535");
// Change the value of the ZIP Comment Size to reflect new comment size
ZipUtil::set16BitValue(static_cast<Poco::UInt16>(comment.size()), _rawInfo, ZIPCOMMENT_LENGTH_POS);
// Now change our internal comment
_comment = comment;
}
} } // namespace Poco::Zip