Implemented more STL and page allocation for malloc.

bastl/include/memory

@@ -5,9 +5,42 @@
 #define BAD_APPLE_OS_MEMORY_HPP_INCLUDED
 
 #include <cstddef>
+#include <cstring>
+#include <limits>
+#include <new>
+#include <type_traits>
 
 namespace std
 {
+template<typename T>
+struct allocator
+{
+    using value_type = T;
+    using size_type = std::size_t;
+    using propagate_on_container_move_assignment = true_type;
+
+    constexpr allocator() noexcept = default;
+    constexpr allocator(const allocator&) noexcept = default;
+
+    template<typename U>
+    constexpr allocator(const allocator<U>&) noexcept {}
+
+    [[nodiscard]] constexpr T* allocate(size_t n)
+    {
+        if (numeric_limits<size_t>::max() / sizeof(T) < n)
+        {
+            __ba_throw bad_array_new_length();
+        }
+        return static_cast<T*>(::operator new(n * sizeof(T))); // TODO: alignment for bigger types
+    }
+
+    constexpr void deallocate(T* p, size_t n)
+    {
+        (void) n;
+        ::operator delete(p); // TODO: bigger alignments
+    }
+};
+
 constexpr void* align(std::size_t alignment, std::size_t size, void*& ptr, std::size_t& space) noexcept
 {
     if (space < size) {