/* Copyright (C) 2021-2026 Free Software Foundation, Inc.   Contributed by Oracle.    This file is part of GNU Binutils.    This program is free software; you can redistribute it and/or modify   it under the terms of the GNU General Public License as published by   the Free Software Foundation; either version 3, or (at your option)   any later version.    This program is distributed in the hope that it will be useful,   but WITHOUT ANY WARRANTY; without even the implied warranty of   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the   GNU General Public License for more details.    You should have received a copy of the GNU General Public License   along with this program; if not, write to the Free Software   Foundation, 51 Franklin Street - Fifth Floor, Boston,   MA 02110-1301, USA.  */ #include "config.h"#include "util.h"#include "DataStream.h"#include "debug.h" DataStream::DataStream (char *filename) : Data_window (filename){  set_span (0, -1);} DataStream::~DataStream () { } voidDataStream::set_span (int64_t f_offset, int64_t sz){  span_offset = 0;  span_fileoffset = f_offset;  int64_t fsz = get_fsize ();  span_size = sz == -1 ? fsz : sz;  if (span_fileoffset >= fsz)    span_fileoffset = fsz;  if (span_size > fsz - span_fileoffset)    span_size = fsz - span_fileoffset;} int64_tDataStream::read (void *buf, int64_t len){  if (len > span_size - span_offset)    len = span_size - span_offset;  int64_t off = span_offset + span_fileoffset;  span_offset += len;  get_data (off, len, buf);  return len;}