124 lines
3.7 KiB
C++
124 lines
3.7 KiB
C++
// ziphdr.cpp: implementation of the zip header classes.
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//
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// Copyright (C) 2002 Tanguy Fautre
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// For conditions of distribution and use,
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// see copyright notice in ziphdr.h
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//
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//////////////////////////////////////////////////////////////////////
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#include "stdafx.h"
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#include "ziphdr.h"
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#include "fileio.h" // I/O facilities
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namespace zip_file_system {
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//////////////////////////////////////////////////////////////////////
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// Zip Header Classes Member Functions
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//////////////////////////////////////////////////////////////////////
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bool local_file_header::ReadHeader(std::istream & File)
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{
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using io_facilities::readvar;
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// quick check about char size
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//static_assert(CHAR_BIT == 8);
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if (! readvar(File, m_Signature, 4)) return false;
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if (! readvar(File, m_VersionExtract, 2)) return false;
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if (! readvar(File, m_GeneralFlags, 2)) return false;
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if (! readvar(File, m_CompMethod, 2)) return false;
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if (! readvar(File, m_Time, 2)) return false;
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if (! readvar(File, m_Date, 2)) return false;
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if (! readvar(File, m_CRC32, 4)) return false;
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if (! readvar(File, m_CompSize, 4)) return false;
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if (! readvar(File, m_UncompSize, 4)) return false;
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if (! readvar(File, m_FilenameSize, 2)) return false;
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if (! readvar(File, m_FieldSize, 2)) return false;
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m_Filename.resize(m_FilenameSize + 1);
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m_ExtraField.resize(m_FieldSize + 1);
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if (! File.read(&(m_Filename[0]), m_FilenameSize)) return false;
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if (! File.read(&(m_ExtraField[0]), m_FieldSize)) return false;
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m_Filename[m_FilenameSize] = '\0';
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m_ExtraField[m_FieldSize] = '\0';
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return true;
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}
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bool file_header::ReadHeader(std::istream & File)
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{
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using io_facilities::readvar;
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if (! readvar(File, m_Signature, 4)) return false;
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if (! readvar(File, m_VersionMade, 2)) return false;
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if (! readvar(File, m_VersionExtract, 2)) return false;
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if (! readvar(File, m_GeneralFlags, 2)) return false;
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if (! readvar(File, m_CompMethod, 2)) return false;
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if (! readvar(File, m_Time, 2)) return false;
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if (! readvar(File, m_Date, 2)) return false;
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if (! readvar(File, m_CRC32, 4)) return false;
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if (! readvar(File, m_CompSize, 4)) return false;
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if (! readvar(File, m_UncompSize, 4)) return false;
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if (! readvar(File, m_FilenameSize, 2)) return false;
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if (! readvar(File, m_FieldSize, 2)) return false;
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if (! readvar(File, m_CommentSize, 2)) return false;
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if (! readvar(File, m_DiskNb, 2)) return false;
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if (! readvar(File, m_IntAttrib, 2)) return false;
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if (! readvar(File, m_ExtAttrib, 4)) return false;
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if (! readvar(File, m_RelOffset, 4)) return false;
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m_Filename.resize(m_FilenameSize + 1);
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m_ExtraField.resize(m_FieldSize + 1);
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m_Comment.resize(m_CommentSize + 1);
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if (! File.read(&(m_Filename[0]), m_FilenameSize)) return false;
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if (! File.read(&(m_ExtraField[0]), m_FieldSize)) return false;
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if (! File.read(&(m_Comment[0]), m_CommentSize)) return false;
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m_Filename[m_FilenameSize] = '\0';
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m_ExtraField[m_FieldSize] = '\0';
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m_Comment[m_CommentSize] = '\0';
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return true;
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}
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bool eofcd_header::ReadHeader(std::istream & File)
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{
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using io_facilities::readvar;
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if (! readvar(File, m_Signature, 4)) return false;
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if (! readvar(File, m_NbDisks, 2)) return false;
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if (! readvar(File, m_DirDisk, 2)) return false;
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if (! readvar(File, m_LocalEntries, 2)) return false;
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if (! readvar(File, m_TotalEntries, 2)) return false;
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if (! readvar(File, m_DirSize, 4)) return false;
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if (! readvar(File, m_Offset, 4)) return false;
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if (! readvar(File, m_CommentSize, 2)) return false;
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m_Comment.resize(m_CommentSize + 1);
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if (! File.read(&(m_Comment[0]), m_CommentSize)) return false;
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m_Comment[m_CommentSize] = '\0';
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return true;
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}
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} // namespace zip_file_system
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