ByteStreams

Source: tests/io/ByteStreams.cpp

// ========================================================================= //
// This file is part of MyraMath, copyright (c) 2014-2019 by Ryan A Chilton  //
// and distributed by MyraCore, LLC. See LICENSE.txt for license terms.      //
// ========================================================================= //

// Containers.
#include <map>
#include <vector>

// Seralization bits.
#include <myramath/io/ByteStreams.h>
#include <myramath/io/iosize.h>
#include <myramath/io/detail/map.h>

// Reporting.
#include <tests/myratest.h>

using namespace myra;

ADD_TEST("ByteStreams","[io]")
  {
  // Populate a Map instance, m1.
  typedef std::map<int,double> Map;
  Map m1;
  m1[1] = 1.111;
  m1[2] = 2.222;
  m1[3] = 3.333;
  myra::out() << "m1 = [ ";
  for (auto i = m1.begin(); i != m1.end(); ++i)
    myra::out() << "(" << i->first << "," << i->second << ") ";
  myra::out() << "]" << std::endl;
  // Allocate char* buffer big enough to serialize m1 into.
  size_t N = iosize(m1);
  std::vector<char> buffer(N,0);
  // Serialize m.
  ByteOutputStream out(buffer.data(),N);
  out << m1;
  // Examine buffer.
  myra::out() << "buffer = [ ";
  for (size_t n = 0; n < N; ++n) 
    myra::out() << (int) buffer[n] << " ";
  myra::out() << "]" << std::endl;
  // Deserialize into another Map, m2.
  ByteInputStream in(buffer.data(),N);
  auto m2 = in.read<Map>();
  myra::out() << "m2 = [ ";
  for (auto i = m2.begin(); i != m2.end(); ++i)
    myra::out() << "(" << i->first << "," << i->second << ") ";
  myra::out() << "]" << std::endl;
  // Verify the contents of m2.
  REQUIRE(m2.at(1) == 1.111);
  REQUIRE(m2.at(2) == 2.222);
  REQUIRE(m2.at(3) == 3.333);
  REQUIRE(m2.size() == 3);
  }

Results: [PASS]

m1 = [ (1,1.111) (2,2.222) (3,3.333) ]
buffer = [ 3 0 0 0 0 0 0 0 1 0 0 0 45 -78 -99 -17 -89 -58 -15 63 2 0 0 0 45 -78 -99 -17 -89 -58 1 64 3 0 0 0 68 -117 108 -25 -5 -87 10 64 ]
m2 = [ (1,1.111) (2,2.222) (3,3.333) ]

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