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Added support for opening an istream archive

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This commit is contained in:
Robert Osfield
2004-11-13 21:39:29 +00:00
parent ddb0d6bd4f
commit 98a1108696
3 changed files with 69 additions and 69 deletions
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132
src/osgPlugins/osga/OSGA_Archive.cpp
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@@ -235,73 +235,7 @@ bool OSGA_Archive::open(const std::string& filename, ArchiveStatus status, unsig
_status = status;
_input.open(filename.c_str(), std::ios_base::binary | std::ios_base::in);
if (_input)
{
osg::notify(osg::INFO)<<"trying OSGA_Archive::open("<<filename<<")"<<std::endl;
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=0;
_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));
}
osg::notify(osg::INFO)<<"OSGA_Archive::open() doEndianSwap="<<doEndianSwap<<std::endl;
osg::notify(osg::INFO)<<"OSGA_Archive::open() Version="<<_version<<std::endl;
IndexBlock *indexBlock = 0;
while ( (indexBlock=OSGA_Archive::IndexBlock::read(_input, doEndianSwap)) != 0)
{
_indexBlockList.push_back(indexBlock);
if (indexBlock->getPositionNextIndexBlock()==pos_type(0)) break;
_input.seekg(indexBlock->getPositionNextIndexBlock());
}
osg::notify(osg::INFO)<<"OSGA_Archive::open("<<filename<<") succeeded"<<std::endl;
// now need to build the filename map.
_indexMap.clear();
if (!_indexBlockList.empty())
{
_masterFileName = _indexBlockList.front()->getFirstFileName();
}
for(IndexBlockList::iterator itr=_indexBlockList.begin();
itr!=_indexBlockList.end();
++itr)
{
(*itr)->getFileReferences(_indexMap);
}
for(FileNamePositionMap::iterator mitr=_indexMap.begin();
mitr!=_indexMap.end();
++mitr)
{
osg::notify(osg::INFO)<<" filename "<<(mitr->first)<<" pos="<<(int)((mitr->second).first)<<" size="<<(int)((mitr->second).second)<<std::endl;
}
return true;
}
}
osg::notify(osg::INFO)<<"OSGA_Archive::open("<<filename<<") failed"<<std::endl;
_input.close();
return false;
return _open(_input);
}
else
{
@@ -356,6 +290,70 @@ bool OSGA_Archive::open(const std::string& filename, ArchiveStatus status, unsig
bool OSGA_Archive::open(std::istream& fin)
{
osg::notify(osg::NOTICE)<<"OSGA_Archive::open"<<std::endl;
static_cast<std::istream&>(_output).rdbuf(fin.rdbuf());
return false;
}
bool OSGA_Archive::_open(std::istream& input)
{
if (input)
{
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=0;
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));
}
osg::notify(osg::INFO)<<"OSGA_Archive::open() doEndianSwap="<<doEndianSwap<<std::endl;
osg::notify(osg::INFO)<<"OSGA_Archive::open() Version="<<_version<<std::endl;
IndexBlock *indexBlock = 0;
while ( (indexBlock=OSGA_Archive::IndexBlock::read(input, doEndianSwap)) != 0)
{
_indexBlockList.push_back(indexBlock);
if (indexBlock->getPositionNextIndexBlock()==pos_type(0)) break;
input.seekg(indexBlock->getPositionNextIndexBlock());
}
// now need to build the filename map.
_indexMap.clear();
if (!_indexBlockList.empty())
{
_masterFileName = _indexBlockList.front()->getFirstFileName();
}
for(IndexBlockList::iterator itr=_indexBlockList.begin();
itr!=_indexBlockList.end();
++itr)
{
(*itr)->getFileReferences(_indexMap);
}
for(FileNamePositionMap::iterator mitr=_indexMap.begin();
mitr!=_indexMap.end();
++mitr)
{
osg::notify(osg::INFO)<<" filename "<<(mitr->first)<<" pos="<<(int)((mitr->second).first)<<" size="<<(int)((mitr->second).second)<<std::endl;
}
return true;
}
}
return false;
}