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127 lines
3.5 KiB
C++
127 lines
3.5 KiB
C++
//
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// ZipUtil.h
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//
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// Library: Zip
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// Package: Zip
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// Module: ZipUtil
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//
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// Definition of the ZipUtil class.
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//
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// Copyright (c) 2007, Applied Informatics Software Engineering GmbH.
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// and Contributors.
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//
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// SPDX-License-Identifier: BSL-1.0
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//
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#ifndef Zip_ZipUtil_INCLUDED
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#define Zip_ZipUtil_INCLUDED
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#include "Poco/Zip/Zip.h"
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#include "Poco/Zip/ZipCommon.h"
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#include "Poco/DateTime.h"
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#include "Poco/Path.h"
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#include <istream>
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namespace Poco {
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namespace Zip {
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class Zip_API ZipUtil
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/// A utility class used for parsing header information inside of zip files
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{
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public:
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static Poco::UInt16 get16BitValue(const char* pVal, const Poco::UInt32 pos);
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static Poco::UInt32 get32BitValue(const char* pVal, const Poco::UInt32 pos);
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static Poco::UInt64 get64BitValue(const char* pVal, const Poco::UInt32 pos);
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static void set16BitValue(const Poco::UInt16 val, char* pVal, const Poco::UInt32 pos);
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static void set32BitValue(const Poco::UInt32 val, char* pVal, const Poco::UInt32 pos);
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static void set64BitValue(const Poco::UInt64 val, char* pVal, const Poco::UInt32 pos);
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static Poco::DateTime parseDateTime(const char* pVal, const Poco::UInt32 timePos, const Poco::UInt32 datePos);
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static void setDateTime(const Poco::DateTime& dt, char* pVal, const Poco::UInt32 timePos, const Poco::UInt32 datePos);
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static std::string fakeZLibInitString(ZipCommon::CompressionLevel cl);
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static void sync(std::istream& in);
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/// Searches the next valid header in the input stream, stops right before it
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static void syncDataDescriptor(std::istream& in, bool force64);
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/// Searches the next data descriptor
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static void verifyZipEntryFileName(const std::string& zipPath);
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/// Verifies that the name of the ZipEntry is a valid path
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static std::string validZipEntryFileName(const Poco::Path& entry);
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private:
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ZipUtil();
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~ZipUtil();
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ZipUtil(const ZipUtil&);
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ZipUtil& operator=(const ZipUtil&);
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};
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inline Poco::UInt16 ZipUtil::get16BitValue(const char* pVal, const Poco::UInt32 pos)
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{
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return static_cast<Poco::UInt16>((unsigned char)pVal[pos])+ (static_cast<Poco::UInt16>((unsigned char)pVal[pos+1]) << 8);
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}
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inline Poco::UInt32 ZipUtil::get32BitValue(const char* pVal, const Poco::UInt32 pos)
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{
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return static_cast<Poco::UInt32>((unsigned char)pVal[pos])+ (static_cast<Poco::UInt32>((unsigned char)pVal[pos+1]) << 8)+
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(static_cast<Poco::UInt32>((unsigned char)pVal[pos+2]) << 16) + (static_cast<Poco::UInt32>((unsigned char)pVal[pos+3]) << 24);
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}
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inline Poco::UInt64 ZipUtil::get64BitValue(const char* pVal, const Poco::UInt32 pos)
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{
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Poco::UInt64 val = ZipUtil::get32BitValue(pVal, pos+4);
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val = (val << 32) | ZipUtil::get32BitValue(pVal, pos);
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return val;
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}
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inline void ZipUtil::set16BitValue(const Poco::UInt16 val, char* pVal, const Poco::UInt32 pos)
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{
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pVal[pos] = static_cast<char>(val);
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pVal[pos+1] = static_cast<char>(val>>8);
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}
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inline void ZipUtil::set32BitValue(const Poco::UInt32 val, char* pVal, const Poco::UInt32 pos)
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{
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pVal[pos] = static_cast<char>(val);
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pVal[pos+1] = static_cast<char>(val>>8);
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pVal[pos+2] = static_cast<char>(val>>16);
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pVal[pos+3] = static_cast<char>(val>>24);
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}
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inline void ZipUtil::set64BitValue(const Poco::UInt64 val, char* pVal, const Poco::UInt32 pos)
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{
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pVal[pos] = static_cast<char>(val);
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pVal[pos+1] = static_cast<char>(val>>8);
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pVal[pos+2] = static_cast<char>(val>>16);
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pVal[pos+3] = static_cast<char>(val>>24);
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pVal[pos+4] = static_cast<char>(val>>32);
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pVal[pos+5] = static_cast<char>(val>>40);
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pVal[pos+6] = static_cast<char>(val>>48);
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pVal[pos+7] = static_cast<char>(val>>56);
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}
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} } // namespace Poco::Zip
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#endif // Zip_ZipUtil_INCLUDED
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