Function archive_write

libctru/source/archive_dev.c:624–670

! Write to an open file * * @param[in,out] r newlib reentrancy struct * @param[in,out] fd Pointer to archive_file_t * @param[in] ptr Pointer to data to write * @param[in] len Length of data to write * * @returns number of bytes written * @returns -1 for error */

 *  @returns -1 for error
 */
static ssize_t
archive_write(struct _reent *r,
              void          *fd,
              const char    *ptr,
              size_t        len)
{
  Result      rc;
  u32         bytes;
  u32         sync = 0;

  /* get pointer to our data */
  archive_file_t *file = (archive_file_t*)fd;

  /* check that the file was opened with write access */
  if((file->flags & O_ACCMODE) == O_RDONLY)
  {
    r->_errno = EBADF;
    return -1;
  }

  /* check if this is synchronous or not */
  if(file->flags & O_SYNC)
    sync = FS_WRITE_FLUSH | FS_WRITE_UPDATE_TIME;

  if(file->flags & O_APPEND)
  {
    /* append means write from the end of the file */
    rc = FSFILE_GetSize(file->fd, &file->offset);
    if(R_FAILED(rc))
    {
      r->_errno = archive_translate_error(rc);
      return -1;
    }
  }

  rc = FSFILE_Write(file->fd, &bytes, file->offset,
                    (u32*)ptr, len, sync);
  if(R_FAILED(rc))
  {
    r->_errno = archive_translate_error(rc);
    return -1;
  }

  file->offset += bytes;

  return bytes;
}

/*! Read from an open file
 *