Function ANTLRFileStream_with_encoding

src/encodingConversions.cpp:45–76

}

antlr4::ANTLRInputStream ANTLRFileStream_with_encoding(
		const std::filesystem::path &file_name, const std::string &encoding) {
	std::ifstream ifs;
	std::string str;
	ifs.exceptions ( std::ifstream::failbit | std::ifstream::badbit );
	ifs.open(file_name);

	// Sets position to the end of the file.
	ifs.seekg(0, std::ios::end);

	// Reserves memory for the file.
	str.reserve(ifs.tellg());

	// Sets position to the start of the file.
	ifs.seekg(0, std::ios::beg);

	// Sets contents of 'str' to all characters in the file.
	str.assign(std::istreambuf_iterator<char>(ifs),
	  std::istreambuf_iterator<char>());

	str = _to_utf8(str, encoding);

	try {
		antlr4::ANTLRInputStream input_stream(str);
		input_stream.name = file_name.u8string();
		return input_stream;
	} catch (const std::range_error &e) {
		throw std::range_error(
				std::string("Invalid character/encoding in ")
						+ file_name.u8string() + " file");
	}
}

}