/* Copyright 2026 Google LLC

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 "multipart_parser.hpp"

#include <cstddef>

#include <cstdint>

#include <string>

#include <string_view>

extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)

{

    if (size < 4)

    {

        return 0;

    }

    // Use first byte to determine boundary length (1-64 chars)

    uint8_t boundaryLen =

        static_cast<uint8_t>((data[0] % 64) + 1); // 1-64 chars

    size_t offset = 1;

    if (offset + boundaryLen > size)

    {

        return 0;

    }

    std::string boundary(reinterpret_cast<const char*>(data + offset),

                         boundaryLen);

    offset += boundaryLen;

    std::string_view body(reinterpret_cast<const char*>(data + offset),

                          size - offset);

    std::string contentType = "multipart/form-data; boundary=";

    contentType += boundary;

    MultipartParser parser;

    parser.parse(contentType, body);

    return 0;

}