/*
 * Copyright (c) 2021-2022 Cisco and/or its affiliates.
 * Licensed 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.
 */

/**
 * \file common.h
 * \file Common definitions used throughout the code
 */
#ifndef FACEMGR_COMMON_H
#define FACEMGR_COMMON_H

#include <stdbool.h>
#include <stdint.h>
#include <stdlib.h>

#include <hicn/util/ip_address.h>

//#define DEBUG

#define INT_CMP(x, y) x < y ? -1 : (x == y ? 0 : 1)

/* Dump with indent */
#define INDENT(n, fmt) "%*s" fmt, n, ""
#define printfi(n, fmt, ...) printf(INDENT(n * 4, fmt), ##__VA_ARGS__)

/* Random strings */

static inline void rand_str(char *dest, size_t length) {
  char charset[] =
      "0123456789"
      "abcdefghijklmnopqrstuvwxyz"
      "ABCDEFGHIJKLMNOPQRSTUVWXYZ";

  while (length-- > 0) {
    size_t index = (double)rand() / RAND_MAX * (sizeof charset - 1);
    *dest++ = charset[index];
  }
  *dest = '\0';
}

/* Boilerplate code */

#define NO_INITIALIZE(NAME) \
  int NAME##_initialize(NAME##_t *obj) { return 0; }

#define NO_FINALIZE(NAME) \
  int NAME##_finalize(NAME##_t *obj) { return 0; }

#define AUTOGENERATE_CREATE_FREE(NAME)               \
                                                     \
  NAME##_t *NAME##_create() {                        \
    NAME##_t *obj = malloc(sizeof(NAME##_t));        \
    if (!obj) goto ERR_MALLOC;                       \
                                                     \
    if (NAME##_initialize(obj) < 0) goto ERR_INIT;   \
                                                     \
    return obj;                                      \
                                                     \
  ERR_INIT:                                          \
    free(obj);                                       \
  ERR_MALLOC:                                        \
    return NULL;                                     \
  }                                                  \
                                                     \
  void NAME##_free(NAME##_t *obj) {                  \
    if (NAME##_finalize(obj) < 0) (void)0; /* XXX */ \
    free(obj);                                       \
  }

#define AUTOGENERATE_DEFS(NAME)      \
  int NAME##_initialize(NAME##_t *); \
  int NAME##_finalize(NAME##_t *);   \
  NAME##_t *NAME##_create();         \
  void NAME##_free(NAME##_t *);

#endif /* FACEMGR_COMMON_H */