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/*
* (C) Copyright 1996-2012 ECMWF.
*
* This software is licensed under the terms of the Apache Licence Version 2.0
* which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
* In applying this licence, ECMWF does not waive the privileges and immunities
* granted to it by virtue of its status as an intergovernmental organisation nor
* does it submit to any jurisdiction.
*/
#include "eckit/io/Buffer.h"
#include "eckit/io/DataHandle.h"
#include "eckit/io/MemoryHandle.h"
#include "eckit/testing/Test.h"
#include "odc/Reader.h"
#include "odc/Writer.h"
#include "odc/codec/Integer.h"
#include "odc/codec/String.h"
#include "odc/core/MetaData.h"
#include "odc/tools/MockReader.h"
using namespace eckit::testing;
// Constant codecs are a little different from the others, as they can store multiple
// different types within the same codec...
/// Encoding/decoding using codecs and the reader/writer are tested elsewhere.
/// This file is for miscelaneous tests, in case the edge cases elsewhere are insufficient.
///
/// @note This is mainly SDS being paranoid about removing apparently duplicate tests when restructuring
/// @note This test should be in test_codecs_end_to_end.cc, but it was causing segfaults with the cray
/// compiler to put them in the same file. Sigh
// ------------------------------------------------------------------------------------------------------
namespace {
// This looks-like a read-iterator. It isn't, but that doesn't matter!
const int num_rows_to_write = 10;
class MockReadIterator {
public:
MockReadIterator(odc::api::ColumnType type, double data) :
columns_(1), type_(type), data_(data), nRows_(num_rows_to_write), refCount_(0), noMore_(false) {
columns_[0] = new odc::core::Column(columns_);
ASSERT(columns_[0]);
columns_[0]->name("a-col");
columns_[0]->type<odc::core::SameByteOrder>(type_);
columns_[0]->hasMissing(false);
}
odc::core::MetaData& columns() { return columns_; }
bool isNewDataset() { return false; }
double* data() { return &data_; }
bool next() {
if (nRows_ == 0)
return false;
nRows_--;
if (nRows_ == 0)
noMore_ = true;
return true;
}
protected:
odc::core::MetaData columns_;
odc::api::ColumnType type_;
double data_;
int nRows_;
public: // Required for IteratorProxy
int refCount_;
bool noMore_;
};
// n.b. Cannot use local classes as template arguments until c++11, so declare it here.
// A constant string value (shorter than 8 bytes)
// too-big, aligned storage --> undefined sanitizer is happy with access as casted double
alignas(sizeof(double)) const char const_string_2[16] = "pies\0\0\0\0";
struct MockReadIteratorConstString2 : public MockReadIterator {
MockReadIteratorConstString2() :
MockReadIterator(odc::api::STRING, *reinterpret_cast<const double*>(const_string_2)) {
columns_[0]->coder(
std::unique_ptr<odc::core::Codec>(new odc::codec::CodecChars<odc::core::SameByteOrder>(odc::api::STRING)));
}
};
} // namespace
CASE("The constant codec can also store strings shorter than 8 bytes") {
// Construct the encoded stuff
eckit::Buffer buf(4096);
eckit::MemoryHandle writeDH(buf);
{
odc::Writer<> oda(writeDH);
odc::Writer<>::iterator outit = oda.begin();
odc::tool::MockReader<MockReadIteratorConstString2> reader;
outit->pass1(reader.begin(), reader.end());
}
// And test that this decodes correctly
{
eckit::MemoryHandle dh(buf.data(), static_cast<size_t>(writeDH.position()));
dh.openForRead();
odc::Reader oda(dh);
odc::Reader::iterator it = oda.begin();
odc::Reader::iterator end = oda.end();
EXPECT(it->columns()[0]->name() == "a-col");
size_t count = 0;
for (; it != end; ++it) {
double val = (*it)[0];
EXPECT(::memcmp(const_string_2, &val, sizeof(val)) == 0);
count++;
}
EXPECT(count == num_rows_to_write);
// Check that this has used the constant codec.
EXPECT(it->columns()[0]->coder().name() == "constant_string");
EXPECT(it->columns()[0]->type() == odc::api::STRING);
}
}
// ------------------------------------------------------------------------------------------------------
int main(int argc, char* argv[]) {
return run_tests(argc, argv);
}
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