Merge pull request #66 from 0xf00sec/patch-2

feat: `T.Value` (ErrorOr.h)

2 files changed, 42 insertions, 16 deletions

diff --git a/dev/libSystem/SystemKit/Syscall.h b/dev/libSystem/SystemKit/Syscall.h
index a1505b46..35bfc6f8 100644
--- a/dev/libSystem/SystemKit/Syscall.h
+++ b/dev/libSystem/SystemKit/Syscall.h
@@ -14,22 +14,8 @@ IMPORT_C VoidPtr libsys_syscall_arg_2(SizeT id, VoidPtr arg1);
 IMPORT_C VoidPtr libsys_syscall_arg_3(SizeT id, VoidPtr arg1, VoidPtr arg3);
 IMPORT_C VoidPtr libsys_syscall_arg_4(SizeT id, VoidPtr arg1, VoidPtr arg3, VoidPtr arg4);
 
-inline UInt64 libsys_hash_64(const Char* path) {
-  if (!path || *path == 0) return 0;
-
-  const UInt64 FNV_OFFSET_BASIS = 0xcbf29ce484222325ULL;
-  const UInt64 FNV_PRIME        = 0x100000001b3ULL;
-
-  UInt64 hash = FNV_OFFSET_BASIS;
-
-  while (*path) {
-    hash ^= (Char) (*path++);
-    hash *= FNV_PRIME;
-  }
-
-  return hash;
-}
+IMPORT_C UInt64 libsys_hash_64(const Char* path);
 
 #ifndef SYSCALL_HASH
 #define SYSCALL_HASH(str) libsys_hash_64(str)
-#endif  // !SYSCALL_HASH
\ No newline at end of file
+#endif  // !SYSCALL_HASH
diff --git a/dev/libSystem/SystemKit/Verify.h b/dev/libSystem/SystemKit/Verify.h
new file mode 100644
index 00000000..cbf85830
--- /dev/null
+++ b/dev/libSystem/SystemKit/Verify.h
@@ -0,0 +1,40 @@
+/* -------------------------------------------
+
+   Copyright (C) 2025, Amlal El Mahrouss, all rights reserved.
+
+   File: Verify.h
+   Purpose: System Call Interface Verification Layer.
+
+   ------------------------------------------- */
+
+#pragma once
+
+#include <libSystem/SystemKit/System.h>
+
+namespace LibSystem::Detail {
+/// @author 0xf00sec, and Amlal El Mahrouss
+/// @brief safe cast operator.
+template <typename T, typename R = VoidPtr>
+inline R sys_safe_cast(const T* ptr) {
+  _rtl_assert(ptr, "safe cast failed!");
+  return static_cast<R>(const_cast<T*>(ptr));
+}
+
+template <typename T, typename U>
+struct must_cast_traits {
+  constexpr static BOOL value = false;
+};
+
+template <typename T>
+struct must_cast_traits<T, T> {
+  constexpr static BOOL value = true;
+};
+
+/// @author Amlal El Mahrouss
+/// @brief Safe constexpr cast.
+template <typename T, typename R>
+inline constexpr R* sys_constexpr_cast(T* ptr) {
+  static_assert(must_cast_traits<T, R>::value, "constexpr cast failed! types are a mismatch!");
+  return static_cast<R*>(ptr);
+}
+}  // namespace LibSystem::Detail