#include <android/log.h>
#include <boost/context/all.hpp>
#include <boost/context/execution_context_v1.hpp>

#define TRACE(...) __android_log_print(ANDROID_LOG_DEBUG, "boostTest", __VA_ARGS__)
#define ENSURE(x) if ( !(x) ) ensureFailed()

void ensureFailed()
{
  TRACE("%s %d %s",__PRETTY_FUNCTION__, __LINE__,"ENSURE HAS FAILED");
  *(int*)0=12345;
}

void checksprintfResult(int res, int size)
{
  if ( !(res>=0 && res<size) ) {
    ENSURE(false);
  }
}

std::string formatBySnprintf(uint64_t src)
{
  const bool hexFormat = true;
  const char* Format = hexFormat ? "0x%016llX" : "%llu";
  const int size = 100;
  char str[size];
  int res = snprintf ( str, size, Format, src );
  checksprintfResult(res,size);
  std::string result(str,res);
  TRACE("result %d %s",result.size(), result.c_str());
  return result;
}

void callsnprintf()
{
  TRACE("%s %d",__PRETTY_FUNCTION__, __LINE__);
  ENSURE(formatBySnprintf(0xbcdef1234567890)=="0x0BCDEF1234567890");
  TRACE("%s %d",__PRETTY_FUNCTION__, __LINE__);
}


void FiberProc2(void* arg)
{
  TRACE("%s %d",__PRETTY_FUNCTION__, __LINE__);
  boost::context::execution_context& mainCtx = *((boost::context::execution_context*)arg);
  callsnprintf();
  TRACE("%s %d",__PRETTY_FUNCTION__, __LINE__);
  mainCtx();
  TRACE("%s %d must be unreachable!!!",__PRETTY_FUNCTION__, __LINE__);
  ENSURE(false); // not reachable
}

void showBuildType()
{
#ifdef NDEBUG
  TRACE("%s %d release build",__PRETTY_FUNCTION__, __LINE__);
#else
  TRACE("%s %d debug build",__PRETTY_FUNCTION__, __LINE__);
#endif
}

void boostContextTest2()
{
  showBuildType();
  TRACE("%s %d",__PRETTY_FUNCTION__, __LINE__);
  {
    TRACE("%s %d calling WITHOUT fiber",__PRETTY_FUNCTION__, __LINE__);
    callsnprintf();
  }
  {
    TRACE("%s %d calling WITH fiber",__PRETTY_FUNCTION__, __LINE__);
    boost::context::execution_context mainCtx(boost::context::execution_context::current());
    boost::context::execution_context childCtx(&FiberProc2);
    childCtx(&mainCtx);
  }

  TRACE("%s %d",__PRETTY_FUNCTION__, __LINE__);
}


void boostContextTest()
{
  boostContextTest2();
}