/*
  Copyright 2011-2021 David Robillard <d@drobilla.net>

  Permission to use, copy, modify, and/or distribute this software for any
  purpose with or without fee is hereby granted, provided that the above
  copyright notice and this permission notice appear in all copies.

  THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/

#include "serd_config.h"

#include "serd/serd.h"

// IWYU pragma: no_include <features.h>

#include <assert.h>
#include <stddef.h>
#include <stdio.h>

#if USE_POSIX_FADVISE && USE_FILENO
#  include <fcntl.h>
#endif

SerdOutputStream
serd_open_output_stream(SerdWriteFunc const       write_func,
                        SerdStreamCloseFunc const close_func,
                        void* const               stream)
{
  assert(write_func);

  SerdOutputStream output = {stream, write_func, close_func};
  return output;
}

SerdOutputStream
serd_open_output_buffer(SerdBuffer* const buffer)
{
  assert(buffer);

  return serd_open_output_stream(serd_buffer_write, serd_buffer_close, buffer);
}

SerdOutputStream
serd_open_output_file(const char* const path)
{
  assert(path);

#ifdef __GLIBC__
  FILE* const file = fopen(path, "wbe");
#else
  FILE* const file = fopen(path, "wb");
#endif

  if (!file) {
    const SerdOutputStream failure = {NULL, NULL, NULL};
    return failure;
  }

#if USE_POSIX_FADVISE && USE_FILENO
  posix_fadvise(fileno(file), 0, 0, POSIX_FADV_SEQUENTIAL);
#endif

  return serd_open_output_stream(
    (SerdWriteFunc)fwrite, (SerdStreamCloseFunc)fclose, file);
}

SerdStatus
serd_close_output(SerdOutputStream* const output)
{
  int ret = 0;

  if (output) {
    if (output->close && output->stream) {
      ret            = output->close(output->stream);
      output->stream = NULL;
    }

    output->stream = NULL;
  }

  return ret ? SERD_BAD_WRITE : SERD_SUCCESS;
}