cpp/examples/config.h

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

#pragma once

#include <filesystem>
#include <string>

// Define a new macro that is just like the standard C assert macro,
// except that it works even in optimized builds (where NDEBUG is
// defined) and it prints the failed assertion to stderr.
#ifndef ASSERT
#define ASSERT(x)                                    \
  if (!(x)) {                                        \
    char buf[2048];                                  \
    snprintf(buf, sizeof(buf),                       \
             "Assertion failed in \"%s\", line %d\n" \
             "\tProbable bug in software.\n",        \
             __FILE__, __LINE__);                    \
    ABORT(buf);                                      \
  } else  // NOLINT
// The 'else' exists to catch the user's following semicolon
#endif

// Define a new macro that is just like the standard C abort macro,
// except that it prints the failed assertion to stderr.
#ifndef ABORT
#define ABORT(msg)              \
  do {                          \
    fprintf(stderr, "%s", msg); \
    fflush(stderr);             \
    abort();                    \
  } while (0)
#endif

// DASSERT is like ASSERT, but it only works in debug builds.
#ifdef DEBUG
#define DASSERT(x) ASSERT(x)
#else
#define DASSERT(x)
#endif

std::string GetTestingResourceRoot() {
  const char* c_root = std::getenv("GAR_TEST_DATA");
  if (!c_root) {
    throw std::runtime_error(
        "Test resources not found, set GAR_TEST_DATA to auxiliary testing "
        "data");
  }
  return std::string(c_root);
}