/******************************************************************************

 *

 * Project:  PostGIS

 * Purpose:  GeoHash input fuzzer

 *

 ******************************************************************************

 * Copyright (C) 2026 Darafei Praliaskouski <me@komzpa.net>

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 2

 * of the License, or (at your option) any later version.

 *

 ****************************************************************************/

#include <stddef.h>

#include <stdint.h>

#include <stdlib.h>

#include <string.h>

extern "C" {

#include "geos_stub.h"

#include "proj_stub.h"

#include "liblwgeom_internal.h"

}

#include "liblwgeom_fuzzer.hpp"

extern "C" int

LLVMFuzzerInitialize(int * /*argc*/, char *** /*argv*/)

{

  postgis_lwgeom_fuzzer_initialize();

  return 0;

}

extern "C" int LLVMFuzzerTestOneInput(const uint8_t *buf, size_t len);

int

LLVMFuzzerTestOneInput(const uint8_t *buf, size_t len)

{

  if (len < 2)

    return 0;

  char *geohash = static_cast<char *>(malloc(len));

  if (geohash == NULL)

    return 0;

  memcpy(geohash, buf + 1, len - 1);

  geohash[len - 1] = '\0';

  int precision = (buf[0] % 2) ? -1 : (int)(buf[0] % len);

  double lat[2];

  double lon[2];

  if (!POSTGIS_LWGEOM_FUZZER_SETJMP())

    decode_geohash_bbox(geohash, lat, lon, precision);

  postgis_lwgeom_fuzzer_cleanup_allocations();

  free(geohash);

  return 0;

}