1 files changed, 75 insertions, 0 deletions
diff --git a/nihil.ucl/parser.cc b/nihil.ucl/parser.cc
new file mode 100644
index 0000000..816116d
--- /dev/null
+++ b/nihil.ucl/parser.cc
@@ -0,0 +1,75 @@
+/*
+ * This source code is released into the public domain.
+ */
+
+module;
+
+#include <functional>
+#include <string>
+
+#include <ucl.h>
+
+module nihil.ucl;
+
+namespace nihil::ucl {
+
+parse_error::parse_error(std::string what)
+	: error(std::move(what))
+{
+}
+
+auto macro_handler::handle(unsigned char const *data, std::size_t len, void *ud)
+-> bool
+{
+	auto handler = static_cast<macro_handler *>(ud);
+	auto string = std::string_view(
+			reinterpret_cast<char const *>(data),
+			len);
+	return handler->callback(string);
+}
+
+parser::parser(int flags)
+{
+	if ((_parser = ::ucl_parser_new(flags)) != nullptr)
+		return;
+
+	throw error("failed to create UCL parser");
+}
+
+parser::parser()
+	: parser(0)
+{
+}
+
+parser::~parser()
+{
+	if (_parser)
+		::ucl_parser_free(_parser);
+}
+
+auto parser::register_value(
+	this parser &self,
+	std::string_view variable,
+	std::string_view value)
+-> void
+{
+	::ucl_parser_register_variable(
+		self._parser,
+		std::string(variable).c_str(),
+		std::string(value).c_str());
+}
+
+auto parser::top(this parser &self) -> map<object>
+{
+	if (self._parser == nullptr)
+		throw error("attempt to call top() on an empty parser");
+
+	auto obj = ::ucl_parser_get_object(self._parser);
+	if (obj == nullptr)
+		throw error("attempt to call top() on an empty parser");
+
+	// ucl_parser_get_objects() refs the object for us.
+	return {noref, obj};
+}
+
+} // namespace nihil::ucl