bool POVMS_Object::WriteHeader(POVMSStream *stream, int& objectsize)
{
POVMSInt datasize = 0;
POVMSInt maxsize = 16;
objectsize = 0;
if(stream == NULL)
return false;
objectsize = POVMSStream_Size(&data);
if(objectsize == 0)
return false;
datasize += POVMSStream_WriteString("POVRAYMS", stream, &maxsize); // header 8 byte
datasize += POVMSStream_WriteInt(0x0351, stream + datasize, &maxsize); // version 4 byte
datasize += POVMSStream_WriteInt(objectsize, stream + datasize, &maxsize); // object size 4 byte
if((datasize != 16) || (maxsize != 0))
return false;
return true;
}
void POVMS_Object::Write(OutputStream& stream, bool append, bool compress)
{
POVMSType encoding = kPOVMSRawStreamEncoding;
POVMSStream headerstream[16];
POVMSStream *objectstream = nullptr;
POVMSStream *compressedstream = nullptr;
int maxheadersize = 0;
int maxobjectsize = 0;
int objectsize = 0;
int datasize = 0;
try
{
objectsize = POVMSStream_Size(&data);
if(objectsize == 0)
throw POV_EXCEPTION_CODE(pov_base::kNullPointerErr);
if(append == false)
{
datasize = 0;
maxheadersize = 12; // header
datasize += POVMSStream_WriteString("POVRAYMS", headerstream + datasize, &maxheadersize); // header 8 byte
datasize += POVMSStream_WriteInt(0x0370, headerstream + datasize, &maxheadersize); // version 4 byte
if(!stream.write((void *)headerstream, datasize))
throw POV_EXCEPTION_CODE(pov_base::kFileDataErr);
}
objectstream = new POVMSStream[objectsize];
maxobjectsize = objectsize;
(void)POVMSStream_Write(&data, objectstream, &maxobjectsize);
#ifdef POVMS_COMPRESSION_ENABLED
if(compress == true)
{
compressedstream = new POVMSStream[objectsize * 2];
// compress stream data
uLongf destlen = (uLongf)(objectsize * 2);
if(compress2((Bytef *)(compressedstream), &destlen, (Bytef *)(objectstream), (uLongf)(objectsize), Z_BEST_COMPRESSION) != Z_OK)
throw POV_EXCEPTION_CODE(pov_base::kCannotHandleDataErr);
datasize = 0;
maxheadersize = 12; // header
datasize += POVMSStream_WriteInt((POVMSInt)(destlen), headerstream + datasize, &maxheadersize); // data size 4 byte
datasize += POVMSStream_WriteType(kPOVMSGZipStreamEncoding, headerstream + datasize, &maxheadersize); // encoding 4 byte
datasize += POVMSStream_WriteInt(objectsize, headerstream + datasize, &maxheadersize); // object size 4 byte
if(!stream.write((void *)headerstream, datasize))
throw POV_EXCEPTION_CODE(pov_base::kFileDataErr);
if(!stream.write((void *)compressedstream, (int)(destlen))) // data x byte
throw POV_EXCEPTION_CODE(pov_base::kFileDataErr);
}
else
#endif
{
datasize = 0;
maxheadersize = 8; // header
datasize += POVMSStream_WriteInt(objectsize, headerstream + datasize, &maxheadersize); // object size 4 byte
datasize += POVMSStream_WriteType(kPOVMSRawStreamEncoding, headerstream + datasize, &maxheadersize); // encoding 4 byte
if(!stream.write((void *)headerstream, datasize))
throw POV_EXCEPTION_CODE(pov_base::kFileDataErr);
if(!stream.write((void *)objectstream, objectsize)) // object x byte
throw POV_EXCEPTION_CODE(pov_base::kFileDataErr);
}
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;
}
}
