3 files changed, 61 insertions, 11 deletions

diff --git a/lib/nes/common/containers/string-view.cc b/lib/nes/common/containers/string-view.cc
index 8265d09..e3470c0 100644
--- a/lib/nes/common/containers/string-view.cc
+++ b/lib/nes/common/containers/string-view.cc
@@ -15,6 +15,16 @@ namespace nes
 			}
 			return res;
 		}
+
+		auto to_uppercase(char const c) -> char
+		{
+			if (c >= 'a' && c <= 'z')
+			{
+				return static_cast<char>(c - 'a' + 'A');
+			}
+
+			return c;
+		}
 	} // namespace
 
 	string_view::string_view(span<char const> const data)
@@ -44,6 +54,28 @@ namespace nes
 		return data_[data_.get_length() - 1];
 	}
 
+	auto string_view::compare(string_view const other, case_sensitive const sensitive) const -> bool
+	{
+		if (get_length() != other.get_length()) { return false; }
+
+		for (auto i = u32{ 0 }; i < get_length(); ++i)
+		{
+			auto const a = (*this)[i];
+			auto const b = other[i];
+
+			if (sensitive == case_sensitive::yes)
+			{
+				if (a != b) { return false; }
+			}
+			else
+			{
+				if (to_uppercase(a) != to_uppercase(b)) { return false; }
+			}
+		}
+
+		return true;
+	}
+
 	auto string_view::contains(char const needle) const -> bool
 	{
 		for (const auto c : *this)
@@ -63,19 +95,25 @@ namespace nes
 		return string_view{ data_.subspan(first, length) };
 	}
 
-	auto operator==(string_view const lhs, string_view const rhs) -> bool
+	auto string_view::has_prefix(string_view const prefix, case_sensitive const case_sensitive) const -> bool
 	{
-		if (lhs.get_length() != rhs.get_length()) { return false; }
+		if (prefix.get_length() > get_length()) { return false; }
+		return substring(0, prefix.get_length()).compare(prefix, case_sensitive);
+	}
 
-		for (auto i = u32{ 0 }; i < lhs.get_length(); ++i)
-		{
-			if (lhs[i] != rhs[i]) { return false; }
-		}
+	auto string_view::has_suffix(string_view const suffix, case_sensitive const case_sensitive) const -> bool
+	{
+		if (suffix.get_length() > get_length()) { return false; }
+		return substring(get_length() - suffix.get_length()).compare(suffix, case_sensitive);
+	}
 
-		return true;
+	auto operator==(string_view const lhs, string_view const rhs) -> bool
+	{
+		return lhs.compare(rhs);
 	}
+
 	auto operator!=(string_view const lhs, string_view const rhs) -> bool
 	{
-		return !(lhs == rhs);
+		return !lhs.compare(rhs);
 	}
-} // namespace nes
\ No newline at end of file
+} // namespace nes
diff --git a/lib/nes/common/containers/string-view.hh b/lib/nes/common/containers/string-view.hh
index 9bd27ae..858a858 100644
--- a/lib/nes/common/containers/string-view.hh
+++ b/lib/nes/common/containers/string-view.hh
@@ -5,6 +5,12 @@
 
 namespace nes
 {
+	enum class case_sensitive
+	{
+		yes,
+		no,
+	};
+
 	/// Non-owning view into a (not necessarily null-terminated) string.
 	class string_view
 	{
@@ -30,11 +36,14 @@ namespace nes
 
 		auto get_first() const -> char;
 		auto get_last() const -> char;
+		auto compare(string_view, case_sensitive = case_sensitive::yes) const -> bool;
 		auto contains(char) const -> bool;
 		auto substring(u32 first) const -> string_view;
 		auto substring(u32 first, u32 length) const -> string_view;
+		auto has_prefix(string_view, case_sensitive = case_sensitive::yes) const -> bool;
+		auto has_suffix(string_view, case_sensitive = case_sensitive::yes) const -> bool;
 	};
 
 	auto operator==(string_view, string_view) -> bool;
 	auto operator!=(string_view, string_view) -> bool;
-} // namespace nes
\ No newline at end of file
+} // namespace nes
diff --git a/lib/nes/common/status.hh b/lib/nes/common/status.hh
index 4b23b60..54c210f 100644
--- a/lib/nes/common/status.hh
+++ b/lib/nes/common/status.hh
@@ -13,6 +13,7 @@ namespace nes
 		error_buffer_overflow,
 		error_invalid_path,
 		error_invalid_format_string,
+		error_unknown_file_type,
 	};
 
 	constexpr auto to_string(status const status) -> char const*
@@ -35,8 +36,10 @@ namespace nes
 				return "Invalid path";
 			case status::error_invalid_format_string:
 				return "Invalid format string";
+			case status::error_unknown_file_type:
+				return "Unknown file type";
 		}
 
 		return "(invalid)";
 	}
-} // namespace nes
\ No newline at end of file
+} // namespace nes