Function archive_read

libctru/source/archive_dev.c:682–712

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

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

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

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

  /* read the data */
  rc = FSFILE_Read(file->fd, &bytes, file->offset, (u32*)ptr, (u32)len);
  if(R_SUCCEEDED(rc))
  {
    /* update current file offset */
    file->offset += bytes;
    return (ssize_t)bytes;
  }

  r->_errno = archive_translate_error(rc);
  return -1;
}

/*! Update an open file's current offset
 *