/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.

 *

 * Permission is hereby granted, free of charge, to any person obtaining a copy

 * of this software and associated documentation files (the "Software"), to

 * deal in the Software without restriction, including without limitation the

 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or

 * sell copies of the Software, and to permit persons to whom the Software is

 * furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included in

 * all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING

 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS

 * IN THE SOFTWARE.

 */

#include <assert.h>

#include "uv.h"

#include "internal.h"

#include "handle-inl.h"

#include "req-inl.h"

int uv_listen(uv_stream_t* stream, int backlog, uv_connection_cb cb) {

  int err;

  err = ERROR_INVALID_PARAMETER;

  switch (stream->type) {

    case UV_TCP:

      err = uv_tcp_listen((uv_tcp_t*)stream, backlog, cb);

      break;

    case UV_NAMED_PIPE:

      err = uv_pipe_listen((uv_pipe_t*)stream, backlog, cb);

      break;

    default:

      assert(0);

  }

  return uv_translate_sys_error(err);

}

int uv_accept(uv_stream_t* server, uv_stream_t* client) {

  int err;

  err = ERROR_INVALID_PARAMETER;

  switch (server->type) {

    case UV_TCP:

      err = uv_tcp_accept((uv_tcp_t*)server, (uv_tcp_t*)client);

      break;

    case UV_NAMED_PIPE:

      err = uv_pipe_accept((uv_pipe_t*)server, client);

      break;

    default:

      assert(0);

  }

  return uv_translate_sys_error(err);

}

int uv_read_start(uv_stream_t* handle, uv_alloc_cb alloc_cb,

    uv_read_cb read_cb) {

  int err;

  if (handle->flags & UV_HANDLE_READING) {

    return UV_EALREADY;

  }

  if (!(handle->flags & UV_HANDLE_READABLE)) {

    return UV_ENOTCONN;

  }

  err = ERROR_INVALID_PARAMETER;

  switch (handle->type) {

    case UV_TCP:

      err = uv_tcp_read_start((uv_tcp_t*)handle, alloc_cb, read_cb);

      break;

    case UV_NAMED_PIPE:

      err = uv_pipe_read_start((uv_pipe_t*)handle, alloc_cb, read_cb);

      break;

    case UV_TTY:

      err = uv_tty_read_start((uv_tty_t*) handle, alloc_cb, read_cb);

      break;

    default:

      assert(0);

  }

  return uv_translate_sys_error(err);

}

int uv_read_stop(uv_stream_t* handle) {

  int err;

  if (!(handle->flags & UV_HANDLE_READING))

    return 0;

  err = 0;

  if (handle->type == UV_TTY) {

    err = uv_tty_read_stop((uv_tty_t*) handle);

  } else if (handle->type == UV_NAMED_PIPE) {

    uv__pipe_read_stop((uv_pipe_t*) handle);

  } else {

    handle->flags &= ~UV_HANDLE_READING;

    DECREASE_ACTIVE_COUNT(handle->loop, handle);

  }

  return uv_translate_sys_error(err);

}

int uv_write(uv_write_t* req,

             uv_stream_t* handle,

             const uv_buf_t bufs[],

             unsigned int nbufs,

             uv_write_cb cb) {

  uv_loop_t* loop = handle->loop;

  int err;

  if (!(handle->flags & UV_HANDLE_WRITABLE)) {

    return UV_EPIPE;

  }

  err = ERROR_INVALID_PARAMETER;

  switch (handle->type) {

    case UV_TCP:

      err = uv_tcp_write(loop, req, (uv_tcp_t*) handle, bufs, nbufs, cb);

      break;

    case UV_NAMED_PIPE:

      err = uv__pipe_write(

          loop, req, (uv_pipe_t*) handle, bufs, nbufs, NULL, cb);

      break;

    case UV_TTY:

      err = uv_tty_write(loop, req, (uv_tty_t*) handle, bufs, nbufs, cb);

      break;

    default:

      assert(0);

  }

  return uv_translate_sys_error(err);

}

int uv_write2(uv_write_t* req,

              uv_stream_t* handle,

              const uv_buf_t bufs[],

              unsigned int nbufs,

              uv_stream_t* send_handle,

              uv_write_cb cb) {

  uv_loop_t* loop = handle->loop;

  int err;

  if (send_handle == NULL) {

    return uv_write(req, handle, bufs, nbufs, cb);

  }

  if (handle->type != UV_NAMED_PIPE || !((uv_pipe_t*) handle)->ipc) {

    return UV_EINVAL;

  } else if (!(handle->flags & UV_HANDLE_WRITABLE)) {

    return UV_EPIPE;

  }

  err = uv__pipe_write(

      loop, req, (uv_pipe_t*) handle, bufs, nbufs, send_handle, cb);

  return uv_translate_sys_error(err);

}

int uv_try_write(uv_stream_t* stream,

                 const uv_buf_t bufs[],

                 unsigned int nbufs) {

  if (stream->flags & UV_HANDLE_CLOSING)

    return UV_EBADF;

  if (!(stream->flags & UV_HANDLE_WRITABLE))

    return UV_EPIPE;

  switch (stream->type) {

    case UV_TCP:

      return uv__tcp_try_write((uv_tcp_t*) stream, bufs, nbufs);

    case UV_TTY:

      return uv__tty_try_write((uv_tty_t*) stream, bufs, nbufs);

    case UV_NAMED_PIPE:

      return UV_EAGAIN;

    default:

      assert(0);

      return UV_ENOSYS;

  }

}

int uv_shutdown(uv_shutdown_t* req, uv_stream_t* handle, uv_shutdown_cb cb) {

  uv_loop_t* loop = handle->loop;

  if (!(handle->flags & UV_HANDLE_WRITABLE) ||

      handle->flags & UV_HANDLE_SHUTTING ||

      uv__is_closing(handle)) {

    return UV_ENOTCONN;

  }

  UV_REQ_INIT(req, UV_SHUTDOWN);

  req->handle = handle;

  req->cb = cb;

  handle->flags &= ~UV_HANDLE_WRITABLE;

  handle->flags |= UV_HANDLE_SHUTTING;

  handle->stream.conn.shutdown_req = req;

  handle->reqs_pending++;

  REGISTER_HANDLE_REQ(loop, handle, req);

  uv_want_endgame(loop, (uv_handle_t*)handle);

  return 0;

}

int uv_is_readable(const uv_stream_t* handle) {

  return !!(handle->flags & UV_HANDLE_READABLE);

}

int uv_is_writable(const uv_stream_t* handle) {

  return !!(handle->flags & UV_HANDLE_WRITABLE);

}

int uv_stream_set_blocking(uv_stream_t* handle, int blocking) {

  if (handle->type != UV_NAMED_PIPE)

    return UV_EINVAL;

  if (blocking != 0)

    handle->flags |= UV_HANDLE_BLOCKING_WRITES;

  else

    handle->flags &= ~UV_HANDLE_BLOCKING_WRITES;

  return 0;

}