// Copyright 2024 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.

#pragma once

#include <sys/ioctl.h>

#include <unistd.h>

#include <cstdint>

namespace google

{

namespace hoth

{

namespace internal

{

/** @class Sys

 *  @brief Overridable direct syscall interface

 *

 *  TODO: factor this out into a syscall class shared by all upstream projects

 */

class Sys

{

  public:

    virtual ~Sys() = default;

    virtual int open(const char* pathname, int flags) const = 0;

    virtual int close(int fd) const = 0;

    virtual off_t lseek(int fd, off_t offset, int whence) const = 0;

    virtual ssize_t read(int fd, void* buf, size_t count) const = 0;

    virtual ssize_t write(int fd, const void* buf, size_t count) const = 0;

    virtual int ioctl(int fd, uint64_t request, void* mtd) const = 0;

};

} // namespace internal

} // namespace hoth

} // namespace google