1 files changed, 92 insertions, 0 deletions
diff --git a/src/kernel/NeKit/KString.h b/src/kernel/NeKit/KString.h
new file mode 100644
index 00000000..fa83fed4
--- /dev/null
+++ b/src/kernel/NeKit/KString.h
@@ -0,0 +1,92 @@
+/* ========================================
+
+  Copyright (C) 2024-2025, Amlal El Mahrouss, licensed under the Apache 2.0 license.
+
+======================================== */
+
+#pragma once
+
+#include <CompilerKit/CompilerKit.h>
+#include <NeKit/Defines.h>
+#include <NeKit/ErrorOr.h>
+#include <NeKit/KernelPanic.h>
+#include <NeKit/Utils.h>
+
+namespace Kernel {
+inline auto kMinimumStringSize = 8196;
+
+/// @brief Kernel string class, not dynamic.
+template <typename CharKind = Char>
+class KBasicString final {
+ public:
+  explicit KBasicString() {
+    fDataSz = kMinimumStringSize;
+
+    fData = new CharKind[fDataSz];
+    MUST_PASS(fData);
+
+    rt_set_memory(fData, 0, fDataSz);
+  }
+
+  explicit KBasicString(SizeT Sz) : fDataSz(Sz) {
+    MUST_PASS(Sz > 1);
+
+    fData = new CharKind[Sz];
+    MUST_PASS(fData);
+
+    rt_set_memory(fData, 0, Sz);
+  }
+
+  ~KBasicString() {
+    if (fData) {
+      delete[] fData;
+      fData = nullptr;
+    }
+  }
+
+  NE_COPY_DEFAULT(KBasicString)
+
+  CharKind*       Data();
+  const CharKind* CData() const;
+  Size            Length() const;
+
+  bool operator==(const CharKind* rhs) const;
+  bool operator!=(const CharKind* rhs) const;
+
+  bool operator==(const KBasicString<CharKind>& rhs) const;
+  bool operator!=(const KBasicString<CharKind>& rhs) const;
+
+  KBasicString<CharKind>& operator+=(const CharKind* rhs);
+  KBasicString<CharKind>& operator+=(const KBasicString<CharKind>& rhs);
+
+  operator const char*() { return fData; }
+
+  operator bool() { return fData; }
+
+  bool operator!() { return fData; }
+
+ private:
+  CharKind* fData{nullptr};
+  Size      fDataSz{0};
+  Size      fCur{0};
+
+  friend class KStringBuilder;
+};
+
+using KString   = KBasicString<>;
+using KStringOr = ErrorOr<KString>;
+
+class KStringBuilder final {
+ public:
+  template <typename CharKind = Char>
+  static ErrorOr<KBasicString<CharKind>> Construct(const CharKind* data);
+  template <typename CharKind = Char>
+  static const CharKind* FromBool(const CharKind* fmt, bool n);
+  template <typename CharKind = Char>
+  static const CharKind* Format(const CharKind* fmt, const CharKind* from);
+  template <typename CharKind = Char>
+  static bool Equals(const CharKind* lhs, const CharKind* rhs);
+};
+}  // namespace Kernel
+
+#include <NeKit/KString.inl>