//
//      srecord - manipulate eprom load files
//      Copyright (C) 2001, 2002, 2006, 2007 Peter Miller
//
//      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 of the License, 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, see
//      <http://www.gnu.org/licenses/>.
//


#include <lib/srec/output/file/signetics.h>
#include <lib/srec/record.h>


srec_output_file_signetics::srec_output_file_signetics() :
    srec_output_file(),
    pref_block_size(32),
    last_address(0)
{
}


srec_output_file_signetics::srec_output_file_signetics(
        const std::string &a_file_name) :
    srec_output_file(a_file_name),
    pref_block_size(32),
    last_address(0)
{
}


srec_output_file_signetics::srec_output_file_signetics(
        const srec_output_file_signetics &) :
    srec_output_file(),
    pref_block_size(32),
    last_address(0)
{
    fatal_error("bug (%s, %d)", __FILE__, __LINE__);
}


srec_output_file_signetics &
srec_output_file_signetics::operator=(const srec_output_file_signetics &)
{
    fatal_error("bug (%s, %d)", __FILE__, __LINE__);
    return *this;
}


srec_output_file_signetics::~srec_output_file_signetics()
{
    put_char(':');
    put_word(last_address);
    put_byte(0);
    put_char('\n');
}


void
srec_output_file_signetics::checksum_add(unsigned char n)
{
    checksum ^= n;
    checksum = (checksum << 1) | ((checksum >> 7) & 1);
}


void
srec_output_file_signetics::write(const srec_record &record)
{
    switch (record.get_type())
    {
    case srec_record::type_header:
        // This format can't do header records
        break;

    case srec_record::type_data:
        if (record.get_length() < 1)
            return;
        if (record.get_address() + record.get_length() > (1UL << 16))
        {
            fatal_error
            (
                "data address (0x%lX..0x%lX) too large",
                record.get_address(),
                record.get_address() + record.get_length() - 1
            );
        }
        put_char(':');
        checksum_reset();
        put_word(record.get_address());
        put_byte(record.get_length());
        put_byte(checksum_get());
        checksum_reset();
        for (int j = 0; j < record.get_length(); ++j)
            put_byte(record.get_data(j));
        put_byte(checksum_get());
        put_char('\n');
        last_address = record.get_address() + record.get_length();
        break;

    case srec_record::type_data_count:
        // ignore
        break;

    case srec_record::type_start_address:
        // This format can't do start address records
        if (data_only_flag)
            break;
        break;

    case srec_record::type_unknown:
        fatal_error("can't write unknown record type");
    }
}


void
srec_output_file_signetics::line_length_set(int linlen)
{
    //
    // Given the number of characters, figure the maximum number of
    // data baytes.
    //
    int             n = (linlen - 11) / 2;

    //
    // Constrain based on the file format.
    //
    if (n < 1)
        n = 1;
    else if (n > 255)
        n = 255;

    //
    // An additional constraint is the size of the srec_record
    // data buffer.
    //
    if (n > srec_record::max_data_length)
        n = srec_record::max_data_length;
    pref_block_size = n;
}


void
srec_output_file_signetics::address_length_set(int)
{
    // ignore (this is only a 16-bit format)
}


int
srec_output_file_signetics::preferred_block_size_get() const
{
    return pref_block_size;
}


const char *
srec_output_file_signetics::format_name()
    const
{
    return "Signetics";
}