fileHeader.cpp

Engine/source/core/util/zip/fileHeader.cpp

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Detailed Description

  1
  2//-----------------------------------------------------------------------------
  3// Copyright (c) 2012 GarageGames, LLC
  4//
  5// Permission is hereby granted, free of charge, to any person obtaining a copy
  6// of this software and associated documentation files (the "Software"), to
  7// deal in the Software without restriction, including without limitation the
  8// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
  9// sell copies of the Software, and to permit persons to whom the Software is
 10// furnished to do so, subject to the following conditions:
 11//
 12// The above copyright notice and this permission notice shall be included in
 13// all copies or substantial portions of the Software.
 14//
 15// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 16// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 17// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 18// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 19// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 20// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 21// IN THE SOFTWARE.
 22//-----------------------------------------------------------------------------
 23
 24#include "core/frameAllocator.h"
 25#include "core/stream/stream.h"
 26
 27#include "core/util/zip/fileHeader.h"
 28#include "core/util/zip/compressor.h"
 29
 30#include "core/util/safeDelete.h"
 31
 32#include "core/resizeStream.h"
 33#include "core/strings/stringFunctions.h"
 34#include "core/frameAllocator.h"
 35
 36namespace Zip
 37{
 38
 39//-----------------------------------------------------------------------------
 40// Constructor/Destructor
 41//-----------------------------------------------------------------------------
 42
 43FileHeader::FileHeader()
 44{
 45   mHeaderSig = mFileHeaderSignature;
 46
 47   mExtractVer = 20;
 48   mFlags = 0;
 49   mCompressMethod = Stored;
 50
 51   mModTime = 0;
 52   mModDate = 0;
 53
 54   mCRC32 = 0;
 55
 56   mCompressedSize = 0;
 57   mUncompressedSize = 0;
 58
 59   mFilename = "";
 60}
 61
 62FileHeader::~FileHeader()
 63{
 64   for(S32 i = 0;i < mExtraFields.size();i++)
 65   {
 66      SAFE_DELETE(mExtraFields[i]);
 67   }
 68}
 69
 70//-----------------------------------------------------------------------------
 71// Protected Methods
 72//-----------------------------------------------------------------------------
 73
 74bool FileHeader::readExtraFields(Stream *stream, U16 efLen)
 75{
 76   bool ret = true;
 77
 78   U32 pos = stream->getPosition();
 79   U32 end = pos + efLen;
 80
 81   while(stream->getPosition() < end)
 82   {
 83      U16 fieldSig, fieldSize;
 84
 85      ret = false;
 86
 87      ret |= stream->read(&fieldSig);
 88      ret |= stream->read(&fieldSize);
 89      if(! ret)
 90         break;
 91
 92      pos = stream->getPosition();
 93
 94      ExtraField *ef = ExtraField::create(fieldSig);
 95      if(ef)
 96      {
 97         ret |= ef->read(stream);
 98
 99         if(! ret)
100            delete ef;
101         else
102            mExtraFields.push_back(ef);
103      }
104
105      stream->setPosition(pos + fieldSize);
106   }
107   
108   return ret;
109}
110
111//-----------------------------------------------------------------------------
112// Public Methods
113//-----------------------------------------------------------------------------
114
115bool FileHeader::read(Stream *stream)
116{
117   stream->read(&mHeaderSig);
118   if(mHeaderSig != mFileHeaderSignature)
119      return false;
120
121   stream->read(&mExtractVer);
122   stream->read(&mFlags);
123   stream->read(&mCompressMethod);
124   stream->read(&mModTime);
125   stream->read(&mModDate);
126   stream->read(&mCRC32);
127   stream->read(&mCompressedSize);
128   stream->read(&mUncompressedSize);
129   
130   U16 fnLen, efLen;
131   stream->read(&fnLen);
132   stream->read(&efLen);
133
134   char *fn = new char[fnLen + 1];
135   stream->read(fnLen, fn);
136   fn[fnLen] = 0;
137   mFilename = fn;
138   SAFE_DELETE_ARRAY(fn);
139   
140
141   return readExtraFields(stream, efLen);
142}
143
144bool FileHeader::write(Stream *stream)
145{
146   mHeaderSig = mFileHeaderSignature;
147
148   stream->write(mHeaderSig);
149   
150   stream->write(mExtractVer);
151   stream->write(mFlags);
152   stream->write(mCompressMethod);
153   stream->write(mModTime);
154   stream->write(mModDate);
155   stream->write(mCRC32);
156   stream->write(mCompressedSize);
157   stream->write(mUncompressedSize);
158
159   U16 fnLen = mFilename.length(),
160      efLen = 0;
161   stream->write(fnLen);
162   stream->write(efLen);
163
164   if(fnLen)
165      stream->write(fnLen, mFilename);
166
167   // FIXME [tom, 1/23/2007] Write extra fields here
168
169   return true;
170}
171
172//-----------------------------------------------------------------------------
173
174ExtraField *FileHeader::findExtraField(U16 id)
175{
176   for(S32 i = 0;i < mExtraFields.size();++i)
177   {
178      if(mExtraFields[i]->getID() == id)
179         return mExtraFields[i];
180   }
181
182   return NULL;
183}
184
185//-----------------------------------------------------------------------------
186
187void FileHeader::setFilename(String filename)
188{
189   mFilename = filename;
190}
191
192} // end namespace Zip
193