/*

 * Copyright (c) 2017-2026 Free Software Foundation, Inc.

 *

 * This file is part of libwget.

 *

 * Libwget is free software: you can redistribute it and/or modify

 * it under the terms of the GNU Lesser General Public License as published by

 * the Free Software Foundation, either version 3 of the License, or

 * (at your option) any later version.

 *

 * Libwget is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public License

 * along with libwget.  If not, see <https://www.gnu.org/licenses/>.

 */

#include <config.h>

#include <assert.h>

#include <stdio.h>

#include <stdint.h>

#include <stdlib.h>

#include <string.h>

#include "wget.h"

#include "fuzzer.h"

static void test(char *in, size_t len, const char *encoding)

{

  wget_iri *base;

  base = wget_iri_parse("http://x.org", encoding);

  assert(base != NULL);

  wget_iri *iri, *iri2;

  iri = wget_iri_parse(in, encoding);

  iri2 = wget_iri_clone(iri);

  wget_iri_free(&iri2);

  iri2 = wget_iri_parse_base(NULL, in, encoding);

  wget_iri_free(&iri2);

  iri2 = wget_iri_parse_base(base, in, encoding);

  int x = wget_iri_compare(iri, iri2);

  wget_iri_free(&iri2);

  wget_buffer buf;

  wget_buffer_init(&buf, NULL, 32);

  wget_buffer_printf(&buf, "%d", x); // use x to avoid optimization (removal of call to wget_iri_compare)

  wget_iri_relative_to_abs(base, (const char *) in, len, &buf);

  wget_iri_escape(in, &buf);

  wget_iri_escape_path(in, &buf);

  wget_iri_escape_query(in, &buf);

  if (iri) {

    if (wget_iri_supported(iri)) {

      wget_iri_set_scheme(iri, WGET_IRI_SCHEME_HTTPS);

      // clone after set_scheme may trigger a buffer overflow

      iri2 = wget_iri_clone(iri);

      wget_iri_free(&iri2);

    }

    wget_iri_get_escaped_host(iri, &buf);

    wget_iri_get_escaped_resource(iri, &buf);

    wget_iri_get_path(iri, &buf, encoding);

    wget_iri_get_query_as_filename(iri, &buf, encoding);

    wget_iri_get_basename(iri, &buf, encoding, WGET_IRI_WITH_QUERY);

    wget_iri_get_connection_part(iri, &buf);

  }

  wget_buffer_deinit(&buf);

  wget_iri_free(&iri);

  wget_iri_free(&base);

}

int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)

{

  if (size > 10000) // same as max_len = 10000 in .options file

    return 0;

  char *in = (char *) malloc(size + 1);

  assert(in != NULL);

  // 0 terminate

  memcpy(in, data, size);

  in[size] = 0;

  // the expression avoids removal of calls to pure functions

  if (wget_iri_isreserved('='))

    wget_iri_set_defaultpage("index.html");

  test(in, size, "iso-8859-1");

  test(in, size, "utf-8");

  free(in);

  return 0;

}