/**

 * FreeRDP: A Remote Desktop Protocol Implementation

 * JSON parser wrapper

 *

 * Copyright 2024 Armin Novak <anovak@thincast.com>

 * Copyright 2024 Thincast Technologies GmbH

 *

 * 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 <math.h>

#include <errno.h>

#include <winpr/file.h>

#include <winpr/json.h>

#include <winpr/assert.h>

WINPR_JSON* WINPR_JSON_ParseFromFile(const char* filename)

{

  FILE* fp = winpr_fopen(filename, "r");

  if (!fp)

    return NULL;

  WINPR_JSON* json = WINPR_JSON_ParseFromFileFP(fp);

  (void)fclose(fp);

  return json;

}

WINPR_JSON* WINPR_JSON_ParseFromFileFP(FILE* fp)

{

  if (!fp)

    return NULL;

  if (fseek(fp, 0, SEEK_END) != 0)

    return NULL;

  const INT64 size = _ftelli64(fp);

  if (size < 0)

    return NULL;

  if (fseek(fp, 0, SEEK_SET) != 0)

    return NULL;

  const size_t usize = WINPR_ASSERTING_INT_CAST(size_t, size);

  char* str = calloc(usize + 1, sizeof(char));

  if (!str)

    return NULL;

  WINPR_JSON* json = NULL;

  const size_t s = fread(str, sizeof(char), usize, fp);

  if (s == usize)

    json = WINPR_JSON_ParseWithLength(str, usize);

  free(str);

  return json;

}