bool POVMS_Object::ReadObject(POVMSStream *stream, int objectsize)
{
int err;
if(stream == NULL)
return false;
if(objectsize == 0)
return false;
err = POVMSObject_Delete(&data);
if(err != kNoErr)
return false;
err = POVMSStream_Read(&data, stream, &objectsize);
if(err != kNoErr)
return false;
if(objectsize != 0)
return false;
return true;
}
void POVMS_Object::Read(InputStream& stream, bool continued, bool headeronly)
{
POVMSStream headerstream[16];
POVMSStream *objectstream = nullptr;
POVMSStream *compressedstream = nullptr;
int err = pov_base::kNoErr;
int maxheadersize = 0;
int datasize = 0;
try
{
err = POVMSObject_Delete(&data);
if(err != pov_base::kNoErr)
throw POV_EXCEPTION_CODE(err);
if(continued == false)
{
char header[8];
POVMSInt version = 0;
if(!stream.read((void *)headerstream, 12))
throw POV_EXCEPTION_CODE(pov_base::kFileDataErr);
datasize = 0;
maxheadersize = 12; // header
datasize += POVMSStream_ReadString(header, headerstream + datasize, 8, &maxheadersize); // header 8 byte
if(!((header[0] == 'P') && (header[1] == 'O') && (header[2] == 'V') && (header[3] == 'R') &&
(header[4] == 'A') && (header[5] == 'Y') && (header[6] == 'M') && (header[7] == 'S')))
throw POV_EXCEPTION_CODE(pov_base::kVersionErr);
datasize += POVMSStream_ReadInt(&version, headerstream + datasize, &maxheadersize); // version 4 byte
if(version != 0x0370)
throw POV_EXCEPTION_CODE(pov_base::kVersionErr);
}
if(headeronly == false)
{
POVMSInt objectsize = 0;
POVMSType encoding = kPOVMSRawStreamEncoding;
if(!stream.read((void *)headerstream, 8))
throw POV_EXCEPTION_CODE(pov_base::kFileDataErr);
datasize = 0;
maxheadersize = 8; // header
datasize += POVMSStream_ReadInt(&objectsize, headerstream + datasize, &maxheadersize); // data size 4 byte
if(objectsize == 0)
throw POV_EXCEPTION_CODE(pov_base::kFileDataErr);
datasize += POVMSStream_ReadType(&encoding, headerstream + datasize, &maxheadersize); // encoding 4 byte
if(encoding == kPOVMSRawStreamEncoding)
{
objectstream = new POVMSStream[objectsize];
if(!stream.read((void *)objectstream, objectsize)) // object x byte
throw POV_EXCEPTION_CODE(pov_base::kFileDataErr);
if(POVMSStream_Read(&data, objectstream, &objectsize) == 0)
throw POV_EXCEPTION_CODE(pov_base::kFileDataErr);
}
else if(encoding == kPOVMSGZipStreamEncoding)
{
int compressedsize = objectsize;
datasize = 0;
maxheadersize = 4; // header
if(!stream.read((void *)headerstream, 4))
throw POV_EXCEPTION_CODE(pov_base::kFileDataErr);
datasize += POVMSStream_ReadInt(&objectsize, headerstream + datasize, &maxheadersize); // object size 4 byte
if(objectsize == 0)
throw POV_EXCEPTION_CODE(pov_base::kFileDataErr);
compressedstream = new POVMSStream[compressedsize];
objectstream = new POVMSStream[objectsize];
if(!stream.read((void *)compressedstream, compressedsize)) // data x byte
throw POV_EXCEPTION_CODE(pov_base::kFileDataErr);
// uncompress stream data
uLongf destlen = (uLongf)objectsize;
if(uncompress((Bytef *)(objectstream), &destlen, (Bytef *)(compressedstream), (uLongf)(compressedsize)) != Z_OK)
throw POV_EXCEPTION_CODE(pov_base::kCannotHandleDataErr);
if(POVMSStream_Read(&data, objectstream, &objectsize) == 0)
throw POV_EXCEPTION_CODE(pov_base::kFileDataErr);
}
else
throw POV_EXCEPTION_CODE(pov_base::kCannotHandleDataErr);
}
if (objectstream != nullptr)
delete[] objectstream;
objectstream = nullptr;
if (compressedstream != nullptr)
delete[] compressedstream;
compressedstream = nullptr;
}
catch(...)
{
if (objectstream != nullptr)
delete[] objectstream;
if (compressedstream != nullptr)
delete[] compressedstream;
throw;
}
}
