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//
// srecord - manipulate eprom load files
// Copyright (C) 1998, 1999, 2001, 2002, 2006-2011 Peter Miller
//
// This program is free software; you can redistribute it and/or modify it
// under the terms of the GNU Lesser 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 Lesser General Public License
// for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//
#include <cassert>
#include <cstring>
#include <srecord/record.h>
srecord::record::record():
type(type_unknown),
address(0),
length(0)
{
}
srecord::record::record(const srecord::record &arg) :
type(arg.type),
address(arg.address),
length(arg.length)
{
if (arg.length > 0)
memcpy(data, arg.data, arg.length);
}
srecord::record::record(type_t arg) :
type(arg),
address(0),
length(0)
{
}
srecord::record::record(type_t a1, address_t a2) :
type(a1),
address(a2),
length(0)
{
}
srecord::record::record(type_t a1, address_t a2, const data_t *a3, size_t a4) :
type(a1),
address(a2),
length(a4)
{
assert(length <= max_data_length);
if (length > 0)
memcpy(data, a3, length);
}
srecord::record &
srecord::record::operator=(const srecord::record &arg)
{
if (this != &arg)
{
type = arg.type;
address = arg.address;
length = arg.length;
if (arg.length > 0)
memcpy(data, arg.data, arg.length);
}
return *this;
}
srecord::record::~record()
{
}
size_t
srecord::record::maximum_data_length(address_t address)
{
// FIXME: this is format specific
if (address < ((address_t)1 << 16))
return 252;
if (address < ((address_t)1 << 24))
return 251;
return 250;
}
srecord::record::address_t
srecord::record::decode_big_endian(const data_t *buffer, size_t length)
{
assert(length <= sizeof(address_t));
address_t result = 0;
while (length-- > 0)
result = (result << 8) | *buffer++;
return result;
}
srecord::record::address_t
srecord::record::decode_little_endian(const data_t *buffer, size_t length)
{
assert(length <= sizeof(address_t));
address_t result = 0;
buffer += length;
while (length > 0)
{
--length;
--buffer;
result = (result << 8) | *buffer;
}
return result;
}
void
srecord::record::encode_big_endian(data_t *buffer, address_t value,
size_t length)
{
assert(length <= sizeof(address_t));
while (length > 0)
{
--length;
buffer[length] = value;
value >>= 8;
}
}
void
srecord::record::encode_little_endian(data_t *buffer, address_t value,
size_t length)
{
assert(length <= sizeof(address_t));
while (length-- > 0)
{
*buffer++ = value;
value >>= 8;
}
}
bool
srecord::record::is_all_zero()
const
{
for (size_t j = 0; j < length; ++j)
if (data[j])
return false;
return true;
}
void
srecord::record::set_data_extend(size_t n, data_t d)
{
assert(n < max_data_length);
if (n < max_data_length)
{
data[n] = d;
if (length <= n)
length = n + 1;
}
}
bool
srecord::record::address_range_fits_into_n_bits(unsigned nbits)
const
{
assert(nbits > 0);
assert(nbits <= 32);
return ((address >> nbits) < 1 && ((address + length - 1) >> nbits) < 1);
}
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