I'm testing protobuf with zlib compression.
I wrote some c++ sample code using protobuf 3.8.0, but the following error
occurred at calling ParseFromZeroCopyStream() at Ubuntu.
terminate called after throwing an instance of 'std::system_error'
what(): Unknown error -1(core dumped)
what can I do?
I tried to replace ParseFromZeroCopyStream() with
ParseFromBoundedZeroCopyStream(). That results in no core dump, but
ParseFromBoundedZeroCopyStream() returned false.
*test.proto*
syntax = "proto2";
package test;
message Msg{
required uint32 data = 1;}
*test.cc*
#include <iostream>#include
<google/protobuf/io/zero_copy_stream_impl.h>#include
<google/protobuf/io/zero_copy_stream_impl_lite.h>#include
<google/protobuf/io/gzip_stream.h>#include "test.pb.h"
using namespace std;using namespace google::protobuf;using namespace test;
int main(void){
Msg srcMsg;
srcMsg.set_data(1);
long sSize = srcMsg.ByteSizeLong();
cout << "SerializedSize = " << sSize << endl;
char * compressedMsg = new char[sSize];
io::ArrayOutputStream aos(compressedMsg, sSize);
io::GzipOutputStream gos(&aos);
long cSize;
if (srcMsg.SerializeToZeroCopyStream(&gos) == true)
{
gos.Close();
cSize = aos.ByteCount();
cout << "compression success : " << cSize << " bytes" << endl;
}
else
{
cout << "compression error" << endl;
return 1;
}
Msg targetMsg;
io::ArrayInputStream ais(compressedMsg, cSize);
io::GzipInputStream gis(&ais);
if (targetMsg.ParseFromZeroCopyStream(&gis) == false)
{
cout << "decompression error" << endl;
}
else
{
cout << "decompression success : " << targetMsg.ByteSizeLong() << "
bytes" << endl;
cout << "data = " << targetMsg.data() << endl;
}
delete[] compressedMsg;
return 0;}
I expect that decompression succeeds.
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