feat: add basic program stuff

1 files changed, 41 insertions, 0 deletions

diff --git a/src/conversion.cpp b/src/conversion.cpp
new file mode 100644
index 0000000..79b3587
--- /dev/null
+++ b/src/conversion.cpp
@@ -0,0 +1,41 @@
+#include "conversion.hpp"
+
+#include <climits>
+#include <stdexcept>
+
+unsigned int str_to_uint(const std::string_view &str)
+{
+	if (str.at(0) == '-')
+	{
+		throw "Less than 0";
+	}
+
+	std::size_t waste_pos = 0;
+
+	uint64_t num = 0;
+
+	try
+	{
+		num = std::stoul(str.data(), &waste_pos, NUMBER_BASE);
+	}
+	catch (const std::invalid_argument &exc)
+	{
+		throw "Not a number";
+	}
+	catch (const std::out_of_range &exc)
+	{
+		throw "Out of range";
+	}
+
+	if (waste_pos != str.length())
+	{
+		throw "Not a number";
+	}
+
+	if (num > UINT_MAX)
+	{
+		throw "Out of range";
+	}
+
+	return static_cast<unsigned int>(num);
+}