From e0423b3d47d1aab54c55a85cce59555cb076e1ab Mon Sep 17 00:00:00 2001
From: Felix Morgner <felix.morgner@ost.ch>
Date: Thu, 18 Dec 2025 16:18:31 +0100
Subject: kstd/io: implement pointer formatting

---
 libs/kstd/include/kstd/bits/formatter.hpp | 33 ++++++++++++++++++++++++++++---
 1 file changed, 30 insertions(+), 3 deletions(-)

diff --git a/libs/kstd/include/kstd/bits/formatter.hpp b/libs/kstd/include/kstd/bits/formatter.hpp
index e10fc0c..229e76d 100644
--- a/libs/kstd/include/kstd/bits/formatter.hpp
+++ b/libs/kstd/include/kstd/bits/formatter.hpp
@@ -7,8 +7,10 @@
 #include <kstd/bits/format_specs.hpp>
 
 #include <array>
+#include <bit>
 #include <concepts>
 #include <cstddef>
+#include <cstdint>
 #include <iterator>
 #include <string_view>
 #include <type_traits>
@@ -30,7 +32,7 @@ namespace kstd
       return bits::parse_specs(context, specs);
     }
 
-    auto format(T value, format_context & context) -> void
+    auto format(T value, format_context & context) const -> void
     {
       enum struct base
       {
@@ -169,6 +171,31 @@ namespace kstd
     }
   };
 
+  template<typename T>
+  struct formatter<T const *> : formatter<std::uintptr_t>
+  {
+    constexpr auto parse(std::string_view context) -> std::string_view
+    {
+      auto result = formatter<std::uintptr_t>::parse(context);
+      if (!this->specs.type)
+      {
+        this->specs.type = 'p';
+        this->specs.alternative_form = true;
+      }
+      return result;
+    }
+
+    auto format(T const * pointer, format_context & context) const -> void
+    {
+      formatter<std::uintptr_t>::format(std::bit_cast<std::uintptr_t>(pointer), context);
+    }
+  };
+
+  template<typename T>
+  struct formatter<T *> : formatter<T const *>
+  {
+  };
+
   template<>
   struct formatter<std::string_view>
   {
@@ -179,7 +206,7 @@ namespace kstd
       return bits::parse_specs(context, specs);
     }
 
-    auto format(std::string_view string, format_context & context) -> void
+    auto format(std::string_view string, format_context & context) const -> void
     {
       auto const content_length = string.size();
       auto const padding_length = (specs.width > content_length) ? (specs.width - content_length) : 0;
@@ -214,7 +241,7 @@ namespace kstd
       return bits::parse_specs(context, specs);
     }
 
-    auto format(char const * string, format_context & context) -> void
+    auto format(char const * string, format_context & context) const -> void
     {
       if (string)
       {
-- 
cgit v1.2.3