/*

# Copyright 2020 Google Inc.

#

# 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.

#

################################################################################

*/

#include <stdio.h>

#include <stdint.h>

#include <string.h>

#include <stdlib.h>

// Augea includes

#include "augeas.h"

#include "config.h"

#include "fa.h"

#include "internal.h"

/*

 * FA fuzzer. 

 */

extern "C"

int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size){

  if(Size<3){

    return 0;

  }

  char *new_str = (char *)malloc(Size+1);

  if (new_str == NULL){

    return 0;

  }

  memcpy(new_str, Data, Size);

  new_str[Size] = '\0';

  int intSize = (int)Size;  

  char *s;

  size_t len;

  int r = fa_expand_nocase(new_str, intSize, &s, &len);

  struct fa *fa2 = NULL; 

  int r2 = fa_compile(new_str, intSize, &fa2);

  struct fa *fa1 = NULL; 

  fa_compile(&new_str[1], intSize, &fa1);

  struct fa *fa_min;

  fa_min = fa_minus(fa1, fa2);

  if (fa2 != NULL)

  {

    char* word = NULL;

    size_t word_len = 0;

    fa_example(fa2, &word, &word_len);

    if(word != NULL) 

      free(word);

    fa_json(stdout, fa2);

    fa_minimize(fa2);

    fa_dot(stdout, fa2);

  }

  struct fa *fa_b = fa_make_basic(intSize);

  // cleanup

  if (s != NULL)     free(s);

  if (new_str != NULL)   free(new_str);

  if (fa_b != NULL) fa_free(fa_b);

  if (fa_min != NULL)   fa_free(fa_min);

  if (fa1 != NULL) fa_free(fa1);

  if (fa2 != NULL) fa_free(fa2);

  return 0;

}