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Added check for endianess of .osga archives

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This commit is contained in:
Robert Osfield 2004-11-10 21:18:31 +00:00
parent 67aa3792e5
commit 3523577235
3 changed files with 31 additions and 20 deletions
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2
include/osgDB/Archive
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@ -102,7 +102,7 @@ class OSGDB_EXPORT Archive : public ReaderWriter
inline pos_type getPositionNextIndexBlock() const { return _filePositionNextIndexBlock; }
static IndexBlock* read(std::istream& in);
static IndexBlock* read(std::istream& in, bool doEndianSwap);
std::string getFirstFileName() const;

44
src/osgDB/Archive.cpp
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@ -12,6 +12,7 @@
*/
#include <osg/Notify>
#include <osg/Endian>
#include <osgDB/Registry>
#include <osgDB/FileNameUtils>
@ -22,6 +23,7 @@
using namespace osgDB;
float Archive::s_currentSupportedVersion = 0.0;
const unsigned int ENDIAN_TEST_NUMBER = 0x00000001;
osgDB::Archive* osgDB::openArchive(const std::string& filename, Archive::ArchiveStatus status, unsigned int indexBlockSizeHint)
{
@ -66,7 +68,7 @@ void Archive::IndexBlock::allocateData(unsigned int blockSize)
}
}
Archive::IndexBlock* Archive::IndexBlock::read(std::istream& in)
Archive::IndexBlock* Archive::IndexBlock::read(std::istream& in, bool doEndianSwap)
{
if (!in) return 0;
@ -75,6 +77,14 @@ Archive::IndexBlock* Archive::IndexBlock::read(std::istream& in)
in.read(reinterpret_cast<char*>(&indexBlock->_blockSize), sizeof(indexBlock->_blockSize));
in.read(reinterpret_cast<char*>(&indexBlock->_filePositionNextIndexBlock), sizeof(indexBlock->_filePositionNextIndexBlock));
in.read(reinterpret_cast<char*>(&indexBlock->_offsetOfNextAvailableSpace), sizeof(indexBlock-> _offsetOfNextAvailableSpace));
if (doEndianSwap)
{
osg::swapBytes(reinterpret_cast<char*>(&indexBlock->_blockSize), sizeof(indexBlock->_blockSize));
osg::swapBytes(reinterpret_cast<char*>(&indexBlock->_blockSize), sizeof(indexBlock->_blockSize));
osg::swapBytes(reinterpret_cast<char*>(&indexBlock->_filePositionNextIndexBlock), sizeof(indexBlock->_filePositionNextIndexBlock));
osg::swapBytes(reinterpret_cast<char*>(&indexBlock->_offsetOfNextAvailableSpace), sizeof(indexBlock-> _offsetOfNextAvailableSpace));
}
indexBlock->allocateData(indexBlock->_blockSize);
if (indexBlock->_data)
@ -217,6 +227,7 @@ Archive::~Archive()
close();
}
bool Archive::open(const std::string& filename, ArchiveStatus status, unsigned int indexBlockSize)
{
if (status==READ)
@ -230,15 +241,24 @@ bool Archive::open(const std::string& filename, ArchiveStatus status, unsigned i
char identifier[4];
_input.read(identifier,4);
bool validArchive = (identifier[0]=='o' && identifier[1]=='s' && identifier[2]=='g' && identifier[3]=='a');
if (validArchive)
{
unsigned int endianTestWord;
_input.read(reinterpret_cast<char*>(&endianTestWord),4);
bool doEndianSwap = (endianTestWord!=ENDIAN_TEST_NUMBER);
_input.read(reinterpret_cast<char*>(&_version),sizeof(_version));
if (doEndianSwap)
{
osg::swapBytes(reinterpret_cast<char*>(&_version),sizeof(_version));
}
IndexBlock *indexBlock = 0;
while ( (indexBlock=Archive::IndexBlock::read(_input)) != 0)
while ( (indexBlock=Archive::IndexBlock::read(_input, doEndianSwap)) != 0)
{
_indexBlockList.push_back(indexBlock);
if (indexBlock->getPositionNextIndexBlock()==pos_type(0)) break;
@ -280,7 +300,7 @@ bool Archive::open(const std::string& filename, ArchiveStatus status, unsigned i
_input.close();
return false;
}
else if (status==WRITE)
else
{
if (status==WRITE && open(filename,READ))
{
@ -288,14 +308,11 @@ bool Archive::open(const std::string& filename, ArchiveStatus status, unsigned i
_status = WRITE;
_output.open(filename.c_str(), std::ios_base::binary | std::ios_base::in | std::ios_base::out);
osg::notify(osg::INFO)<<"File position after open = "<<(int)_output.tellp()<<" is_open "<<_output.is_open()<<std::endl;
// place write position at end of file.
_output.seekp(0, std::ios::end);
osg::notify(osg::INFO)<<"File position after seekp = "<<(int)_output.tellp()<<std::endl;
@ -310,6 +327,7 @@ bool Archive::open(const std::string& filename, ArchiveStatus status, unsigned i
_status = WRITE;
_output.open(filename.c_str(), std::ios_base::out | std::ios_base::binary | std::ios_base::trunc);
_output<<"osga";
_output.write(reinterpret_cast<const char*>(&ENDIAN_TEST_NUMBER),4);
_output.write(reinterpret_cast<char*>(&s_currentSupportedVersion),sizeof(float));
IndexBlock *indexBlock = new IndexBlock(indexBlockSize);
@ -330,11 +348,6 @@ bool Archive::open(const std::string& filename, ArchiveStatus status, unsigned i
}
}
else
{
osg::notify(osg::NOTICE)<<"Archive::open("<<filename<<") is a strange place!!."<<std::endl;
return false;
}
}
void Archive::close()
@ -611,18 +624,18 @@ ReaderWriter::WriteResult Archive::write(const WriteFunctor& writeFunctor)
{
if (_status!=WRITE)
{
osg::notify(osg::NOTICE)<<"Archive::writeObject(obj, "<<writeFunctor._filename<<") failed, archive opened as read only."<<std::endl;
osg::notify(osg::NOTICE)<<"Archive::write(obj, "<<writeFunctor._filename<<") failed, archive opened as read only."<<std::endl;
return WriteResult(WriteResult::FILE_NOT_HANDLED);
}
ReaderWriter* rw = osgDB::Registry::instance()->getReaderWriterForExtension(getLowerCaseFileExtension(writeFunctor._filename));
if (!rw)
{
osg::notify(osg::NOTICE)<<"Archive::writeObject(obj, "<<writeFunctor._filename<<") failed to find appropriate plugin to write file."<<std::endl;
osg::notify(osg::NOTICE)<<"Archive::write(obj, "<<writeFunctor._filename<<") failed to find appropriate plugin to write file."<<std::endl;
return WriteResult(WriteResult::FILE_NOT_HANDLED);
}
osg::notify(osg::NOTICE)<<"Archive::writeObject(obj, "<<writeFunctor._filename<<")"<<std::endl;
osg::notify(osg::NOTICE)<<"Archive::write(obj, "<<writeFunctor._filename<<")"<<std::endl;
// place write position at end of file.
_output.seekp(0,std::ios::end);
@ -648,6 +661,7 @@ ReaderWriter::WriteResult Archive::writeObject(const osg::Object& obj,const std:
ReaderWriter::WriteResult Archive::writeImage(const osg::Image& image,const std::string& fileName,const Options* options)
{
osg::notify(osg::NOTICE)<<"Archive::writeImage(obj, "<<fileName<<")"<<std::endl;
return write(WriteImageFunctor(image, fileName, options));
}

5
src/osgTerrain/DataSet.cpp
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@ -3244,9 +3244,6 @@ DataSet::CompositeDestination* DataSet::createDestinationGraph(CompositeDestinat
if (texture_dy*resolutionSensitivityScale>tile->_imagery_maxSourceResolutionY) needToDivideY = true;
}
osg::notify(osg::NOTICE)<<"texture_dx="<<texture_dx<<"\t_imagery_maxSourceResolutionX="<<tile->_imagery_maxSourceResolutionX<<std::endl;
osg::notify(osg::NOTICE)<<"texture_dy="<<texture_dy<<"\t_imagery_maxSourceResolutionY="<<tile->_imagery_maxSourceResolutionY<<std::endl;
unsigned int dem_numColumns;
unsigned int dem_numRows;
double dem_dx;
@ -3899,7 +3896,7 @@ void DataSet::_buildDestination(bool writeToDisk)
if (!_archive && !_archiveName.empty())
{
_archive = new osgDB::Archive;
_archive->open(_archiveName, osgDB::Archive::WRITE);
_archive->open(_archiveName, osgDB::Archive::CREATE);
}
if (_destinationGraph.valid())