/**************************************************************************** Copyright (c) 2006, Radon Labs GmbH Copyright (c) 2011-2013,WebJet Business Division,CYOU http://www.genesis-3d.com.cn Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. ****************************************************************************/ #include "stdneb.h" #include "io/zipfs/zipfilestream.h" #include "io/zipfs/zipfilesystem.h" #include "io/zipfs/zipfileentry.h" #include "io/archfs/archive.h" namespace IO { __ImplementClass(IO::ZipFileStream, 'ZFST', IO::Stream); using namespace Util; //------------------------------------------------------------------------------ /** */ ZipFileStream::ZipFileStream() : size(0), position(0), mapBuffer(0), zipFileEntry(0) { // empty } //------------------------------------------------------------------------------ /** */ ZipFileStream::~ZipFileStream() { if (this->IsOpen()) { this->Close(); } n_assert(!this->mapBuffer); } //------------------------------------------------------------------------------ /** */ bool ZipFileStream::CanRead() const { return true; } //------------------------------------------------------------------------------ /** */ bool ZipFileStream::CanWrite() const { return false; } //------------------------------------------------------------------------------ /** */ bool ZipFileStream::CanSeek() const { return true; } //------------------------------------------------------------------------------ /** */ bool ZipFileStream::CanBeMapped() const { return true; } //------------------------------------------------------------------------------ /** */ Stream::Size ZipFileStream::GetSize() const { return this->size; } //------------------------------------------------------------------------------ /** */ Stream::Position ZipFileStream::GetPosition() const { return this->position; } //------------------------------------------------------------------------------ /** Open the stream for reading. This will decompress the entire file from the zip archive into memory. */ bool ZipFileStream::Open() { n_assert(!this->IsOpen()); n_assert(!this->mapBuffer); // allow only read access if (ReadAccess == this->accessMode) { if (Stream::Open()) { // get zip archive which contains the file GPtr zipArchive = ZipFileSystem::Instance()->FindArchive(this->uri).cast(); if (zipArchive.isvalid()) { Dictionary params = this->uri.ParseQuery(); if (params.Contains("file")) { const String& pathInZip = params["file"]; String pwd; if (params.Contains("pwd")) { pwd = params["pwd"]; } // find the zip file in the archive, the path into // the archive is encoded in the query part of our URI this->zipFileEntry = zipArchive->FindFileEntry(pathInZip); if (0 != this->zipFileEntry) { // read content of zip file entry into private buffer this->size = this->zipFileEntry->GetFileSize(); if(!this->zipFileEntry->Open(pwd)) return false; this->position = 0; return true; } } } // fallthrough: failure this->Close(); } } return false; } bool ZipFileStream::Open( const GPtr& archive ) { n_assert(!this->IsOpen()); n_assert(!this->mapBuffer); // allow only read access if (ReadAccess == this->accessMode) { if (Stream::Open()) { if (archive.isvalid()) { Dictionary params = this->uri.ParseQuery(); if (params.Contains("file")) { const String& pathInZip = params["file"]; String pwd; if (params.Contains("pwd")) { pwd = params["pwd"]; } // find the zip file in the archive, the path into // the archive is encoded in the query part of our URI this->zipFileEntry = archive->FindFileEntry(pathInZip); if (0 != this->zipFileEntry) { // read content of zip file entry into private buffer this->size = this->zipFileEntry->GetFileSize(); if(!this->zipFileEntry->Open(pwd)){ return false; } this->position = 0; return true; } } } // fallthrough: failure this->Close(); } } return false; } //------------------------------------------------------------------------------ /** */ void ZipFileStream::Close() { n_assert(this->IsOpen()); if (this->IsMapped()) { this->Unmap(); } Stream::Close(); if(this->zipFileEntry) { this->zipFileEntry->Close(); } this->size = 0; this->position = 0; } //------------------------------------------------------------------------------ /** */ Stream::Size ZipFileStream::Read(void* ptr, Size numBytes) { n_assert(ptr); n_assert(this->IsOpen()); n_assert(!this->IsMapped()); n_assert(ReadAccess == this->accessMode) n_assert((this->position >= 0) && (this->position <= this->size)); n_assert(this->zipFileEntry); // check if end-of-stream is near Size readBytes = Math::n_min(numBytes, this->size - this->position); n_assert((this->position + readBytes) <= this->size); if (readBytes > 0) { if(!this->zipFileEntry->Read(ptr, readBytes)) return 0; this->position += readBytes; } return readBytes; } //------------------------------------------------------------------------------ /** */ void ZipFileStream::Seek(Offset offset, SeekOrigin origin) { n_assert(this->IsOpen()); n_assert(!this->IsMapped()); n_assert((this->position >= 0) && (this->position <= this->size)); const Position posBefore = this->position; switch (origin) { case Begin: this->position = offset; break; case Current: this->position += offset; break; case End: this->position = this->size + offset; break; default: n_assert(false); } // make sure read/write position doesn't become invalid this->position = Math::n_iclamp(this->position, 0, this->size); zipFileEntry->SetOffset(position); // n_assert(this->position >= posBefore); // if(this->position == posBefore) return; // // const long readBytes = this->position - posBefore; // n_assert(readBytes > 0); // char *dummyBuffer = (char *) Memory::Alloc(Memory::StreamDataHeap, readBytes); // n_assert(dummyBuffer); // int read = this->Read(dummyBuffer, readBytes); // Memory::Free(Memory::StreamDataHeap, dummyBuffer); // dummyBuffer = NULL; } //------------------------------------------------------------------------------ /** */ bool ZipFileStream::Eof() const { n_assert(this->IsOpen()); n_assert(!this->IsMapped()); n_assert((this->position >= 0) && (this->position <= this->size)); return (this->position == this->size); } //------------------------------------------------------------------------------ /** */ void* ZipFileStream::Map() { n_assert(this->IsOpen()); n_assert(ReadAccess == this->accessMode); Stream::Map(); n_assert(this->GetSize() > 0); n_assert(!this->mapBuffer); this->mapBuffer = (unsigned char*)Memory::Alloc(Memory::StreamDataHeap, this->size); n_assert(0 != this->mapBuffer); bool success = this->zipFileEntry->Read(this->mapBuffer, this->size); n_assert(success); return this->mapBuffer; } //------------------------------------------------------------------------------ /** */ void ZipFileStream::Unmap() { n_assert(this->IsOpen()); Stream::Unmap(); n_assert(this->mapBuffer); Memory::Free(Memory::StreamDataHeap, this->mapBuffer); this->mapBuffer = NULL; } bool ZipFileStream::IsHeader( void* headPtr, Size numBytes ) { static char buff[100] = {0}; memset(buff,0,sizeof(buff)); n_assert(sizeof(buff) >= numBytes); Read(buff,numBytes); Seek(0,Stream::Begin); bool b = (0 == memcmp(buff,headPtr,numBytes)); return b; } } // namespace IO