Subversion Repositories lxp32

/*

 * Copyright (c) 2016 by Alex I. Kuznetsov.

 *

 * Part of the LXP32 CPU IP core.

 *

 * This module implements members of the OutputWriter class

 * and its derived classes.

 */

#include "outputwriter.h"

#include "utils.h"

#include <iostream>

#include <iomanip>

#include <stdexcept>

#include <algorithm>

#include <cassert>

#include <cstdint>

#include <cstdio>

/*

 * OutputWriter members

 */

void OutputWriter::pad(std::size_t size) {

        static char zeros[256]; // static objects are zero-initialized

        while(size>0) {

                auto n=std::min<std::size_t>(size,256);

                write(zeros,n);

                size-=n;

        }

}

/*

 * BinaryOutputWriter members

 */

BinaryOutputWriter::BinaryOutputWriter(const std::string &filename):

        _filename(filename),

        _os(filename,std::ios_base::out|std::ios_base::binary)

{

        if(!_os) throw std::runtime_error("Cannot open \""+filename+"\" for writing");

}

void BinaryOutputWriter::write(const char *data,std::size_t n) {

        _os.write(data,n);

}

void BinaryOutputWriter::abort() {

        _os.close();

        std::remove(_filename.c_str());

}

/*

 * TextOutputWriter members

 */

TextOutputWriter::TextOutputWriter(const std::string &filename,Format f):

        _filename(filename),

        _os(filename,std::ios_base::out),

        _fmt(f)

{

        if(!_os) throw std::runtime_error("Cannot open \""+filename+"\" for writing");

}

TextOutputWriter::~TextOutputWriter() {

        if(!_buf.empty()) {

                assert(_buf.size()<4);

                pad(4-_buf.size());

        }

}

void TextOutputWriter::write(const char *data,std::size_t n) {

        while(n>0) {

                assert(_buf.size()<4);

                auto count=std::min(4-_buf.size(),n);

                _buf.append(data,count);

                data+=count;

                n-=count;

                if(_buf.size()<4) continue;

                assert(_buf.size()==4);

                std::uint32_t word=(static_cast<unsigned char>(_buf[3])<<24)|

                        (static_cast<unsigned char>(_buf[2])<<16)|

                        (static_cast<unsigned char>(_buf[1])<<8)|

                        static_cast<unsigned char>(_buf[0]);

                if(_fmt==Bin) _os<<Utils::bin(word)<<std::endl;

                else if(_fmt==Dec) _os<<word<<std::endl;

                else _os<<Utils::hex(word)<<std::endl;

                _buf.clear();

        }

}

void TextOutputWriter::abort() {

        _os.close();

        std::remove(_filename.c_str());

}