kstd/io: implement c-string formatting

1 files changed, 30 insertions, 2 deletions

diff --git a/libs/kstd/include/kstd/bits/formatter.hpp b/libs/kstd/include/kstd/bits/formatter.hpp
index 895d52b..e10fc0c 100644
--- a/libs/kstd/include/kstd/bits/formatter.hpp
+++ b/libs/kstd/include/kstd/bits/formatter.hpp
@@ -23,7 +23,7 @@ namespace kstd
   template<std::integral T>
   struct formatter<T>
   {
-    bits::format_specs specs;
+    bits::format_specs specs{};
 
     constexpr auto parse(std::string_view context) -> std::string_view
     {
@@ -172,7 +172,7 @@ namespace kstd
   template<>
   struct formatter<std::string_view>
   {
-    bits::format_specs specs;
+    bits::format_specs specs{};
 
     constexpr auto parse(std::string_view context) -> std::string_view
     {
@@ -204,6 +204,34 @@ namespace kstd
     }
   };
 
+  template<>
+  struct formatter<char const *>
+  {
+    bits::format_specs specs{};
+
+    constexpr auto parse(std::string_view context) -> std::string_view
+    {
+      return bits::parse_specs(context, specs);
+    }
+
+    auto format(char const * string, format_context & context) -> void
+    {
+      if (string)
+      {
+        formatter<std::string_view>{specs}.format(string, context);
+      }
+      else
+      {
+        formatter<std::string_view>{specs}.format("(null)", context);
+      }
+    }
+  };
+
+  template<>
+  struct formatter<char *> : formatter<char const *>
+  {
+  };
+
   struct format_arg
   {
     using formatting_function = std::string_view(void const *, std::string_view, format_context &);