Method computeSourceMapping

libevmasm/AssemblyItem.cpp:541–632

}

std::string AssemblyItem::computeSourceMapping(
	AssemblyItems const& _items,
	std::map<std::string, unsigned> const& _sourceIndicesMap
)
{
	std::string ret;

	int prevStart = -1;
	int prevLength = -1;
	int prevSourceIndex = -1;
	int prevModifierDepth = -1;
	char prevJump = 0;

	for (auto const& item: _items)
	{
		if (!ret.empty())
			ret += ";";

		SourceLocation const& location = item.location();
		int length = location.start != -1 && location.end != -1 ? location.end - location.start : -1;
		int sourceIndex =
			(location.sourceName && _sourceIndicesMap.count(*location.sourceName)) ?
			static_cast<int>(_sourceIndicesMap.at(*location.sourceName)) :
			-1;
		char jump = '-';
		if (item.getJumpType() == evmasm::AssemblyItem::JumpType::IntoFunction || item.type() == CallF || item.type() == JumpF)
			jump = 'i';
		else if (item.getJumpType() == evmasm::AssemblyItem::JumpType::OutOfFunction || item.type() == RetF)
			jump = 'o';
		int modifierDepth = static_cast<int>(item.m_modifierDepth);

		unsigned components = 5;
		if (modifierDepth == prevModifierDepth)
		{
			components--;
			if (jump == prevJump)
			{
				components--;
				if (sourceIndex == prevSourceIndex)
				{
					components--;
					if (length == prevLength)
					{
						components--;
						if (location.start == prevStart)
							components--;
					}
				}
			}
		}

		if (components-- > 0)
		{
			if (location.start != prevStart)
				ret += std::to_string(location.start);
			if (components-- > 0)
			{
				ret += ':';