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Network2C.cpp
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180 lines (175 loc) · 7.14 KB
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#include "NetworkImpl.h"
#include "../../include/dbcppp/Network2Functions.h"
using namespace dbcppp;
using namespace dbcppp::Network2C;
static const char* header =
"#ifndef DBCPPP_BYTE_ORDER_LITTLE_ENDIAN\n"
"#error \"Please pass -DDBCPPP_BYTE_ORDER_LITTLE_ENDIAN=<1|0>\"\n"
"#endif\n"
"#include <stdint.h>\n"
"#define bswap_16(value) ((((value) & 0xff) << 8) | ((value) >> 8))\n"
"#define bswap_32(value) \\\n"
" (((uint32_t)bswap_16((uint16_t)((value) & 0xffff)) << 16) | \\\n"
" (uint32_t)bswap_16((uint16_t)((value) >> 16)))\n"
"#define bswap_64(value) \\\n"
" (((uint64_t)bswap_32((uint32_t)((value) & 0xffffffff)) \\\n"
" << 32) | \\\n"
" (uint64_t)bswap_32((uint32_t)((value) >> 32)))\n"
"uint64_t dbcppp_native_to_big(uint64_t& v)\n"
"{\n"
"#if DBCPPP_BYTE_ORDER_LITTLE_ENDIAN == 1\n"
" return bswap_64(v);\n"
"#else\n"
" return v;\n"
"#endif\n"
"}\n"
"uint64_t dbcppp_native_to_little(uint64_t& v)\n"
"{\n"
"#if DBCPPP_BYTE_ORDER_LITTLE_ENDIAN == 1\n"
" return v;\n"
"#else\n"
" return bswap_64(v);\n"
"#endif\n"
"}\n";
DBCPPP_API std::ostream& dbcppp::Network2C::operator<<(std::ostream& os, const INetwork& net)
{
os << boost::format(header);
for (const auto& msg : net.Messages())
{
for (const auto& sig : msg.Signals())
{
const SignalImpl& sigi = static_cast<const SignalImpl&>(sig);
os << boost::format(
"uint64_t dbcppp_decode_%s(const void* nbytes)\n"
"{\n"
" uint64_t data;\n")
% (msg.Name() + "_" + std::to_string(msg.Id()) + "_" + sig.Name());
uint64_t nbytes;
if (sigi.ByteOrder() == ISignal::EByteOrder::LittleEndian)
{
nbytes = (sigi.StartBit() % 8 + sigi.BitSize() + 7) / 8;
}
else
{
nbytes = (sigi.BitSize() + (7 - sigi.StartBit() % 8) + 7) / 8;
}
if (sigi._byte_pos + nbytes <= 8 || nbytes <= 8)
{
// Alignment::size_inbetween_first_64_bit; or
// Alignment::signal_exceeds_64_bit_size_but_signal_fits_into_64_bit;
if (sigi._byte_pos + nbytes <= 8)
{
os << boost::format(" data = *reinterpret_cast<const uint64_t*>(nbytes);\n");
}
else
{
os << boost::format(
"data = *reinterpret_cast<const uint64_t*>(&reinterpret_cast<const uint8_t*>(nbytes)[%1%]);\n")
% sigi._byte_pos;
}
if (sig.ByteOrder() == ISignal::EByteOrder::BigEndian)
{
os << boost::format(" data = dbcppp_native_to_big(data);\n");
}
else
{
os << boost::format(" data = dbcppp_native_to_little(data);\n");
}
if (sig.ExtendedValueType() == ISignal::EExtendedValueType::Double)
{
os << boost::format(" return data;\n");
}
else
{
os << boost::format(" data >>= %1%ull;\n")
% sigi._fixed_start_bit_0;
if (sig.ExtendedValueType() != ISignal::EExtendedValueType::Float)
{
os << boost::format(" data &= %1%ull;\n") % sigi._mask;
if (sig.ValueType() == ISignal::EValueType::Signed)
{
os << boost::format(
" if (data & %1%ull)\n"
" {\n"
" data |= %1%ull;\n"
" }\n"
" return data;\n")
% sigi._mask_signed;
}
}
os << boost::format(" return data;\n");
}
}
else
{
// Alignment::signal_exceeds_64_bit_size_and_signal_does_not_fit_into_64_bit;
os << boost::format(
" data = *reinterpret_cast<const uint64_t*>(&reinterpret_cast<const uint8_t*>(nbytes)[%1%]);\n")
% sigi._byte_pos;
os << boost::format(
" uint64_t data1 = reinterpret_cast<const uint8_t*>(nbytes)[%1% + 8];\n")
% sigi._byte_pos;
if (sig.ByteOrder() == ISignal::EByteOrder::BigEndian)
{
os << boost::format(
" data = dbcppp_native_to_big(data);\n"
" data &= %1%ull;\n"
" data <<= %2%ull;\n"
" data1 >>= %3%ull;\n"
" data |= data1;\n")
% sigi._mask
% sigi._fixed_start_bit_0
% sigi._fixed_start_bit_1;
}
else
{
os << boost::format(
" data = dbcppp_native_to_little(data);\n"
" data >>= %1%ull;\n"
" data1 &= %2%ull;\n"
" data1 <<= %3%ull;\n"
" data |= data1;)\n")
% sigi._fixed_start_bit_0
% sigi._mask
% sigi._fixed_start_bit_1;
}
switch (sig.ExtendedValueType())
{
case ISignal::EExtendedValueType::Integer:
if (sig.ValueType() == ISignal::EValueType::Signed)
{
os << boost::format(
" if (data & %1%ull)\n"
" {\n"
" data |= %1%ull;\n"
" }\n"
" return data;\n")
% sigi._mask_signed;
os << boost::format(" return data;\n");
}
else
{
os << boost::format(" return data;\n");
}
break;
case ISignal::EExtendedValueType::Float:
os << boost::format(" return data;\n");
break;
case ISignal::EExtendedValueType::Double:
os << boost::format(" return data;\n");
break;
}
}
os << boost::format("}\n");
os << boost::format(
"double dbcppp_rawToPhys_%1%(uint64_t value)\n"
"{\n"
" return value * %2% + %3%;\n"
"}\n")
% (msg.Name() + "_" + std::to_string(msg.Id()) + "_" + sig.Name())
% sig.Factor()
% sig.Offset();
}
}
return os;
}