Replace memset with std fill

kernel/include/paging.hpp

@@ -12,7 +12,7 @@
 
 namespace paging {
 
-const int PAGE_SIZE = 4096;
+constexpr const int PAGE_SIZE = 4096;
 
 void* physical_address(void* virt);
 bool page_present(void* virt);

kernel/include/utils.hpp

@@ -10,6 +10,26 @@
 
 #include "types.hpp"
 
+namespace std {
+
+template<typename ForwardIterator, typename T>
+void fill(ForwardIterator it, ForwardIterator end, const T& value){
+    while(it != end){
+        *it = value;
+        ++it;
+    }
+}
+
+template<typename ForwardIterator, typename T>
+void fill_n(ForwardIterator it, size_t n, const T& value){
+    while(n--){
+        *it = value;
+        ++it;
+    }
+}
+
+} //end of namespace std
+
 template<typename CharT>
 struct basic_string;
 typedef basic_string<char> string;
@@ -20,7 +40,6 @@ uint64_t parse(const string& str);
 
 uint64_t str_len(const char* a);
 
-void memset(void * ptr, uint8_t value, size_t num);
 int memcmp(const void* s1, const void* s2, size_t n);
 void memcopy(void* destination, const void* source, size_t n);
 

kernel/src/paging.cpp

@@ -19,17 +19,18 @@ typedef pt_t* pdt_t;
 typedef pdt_t* pdpt_t;
 typedef pdpt_t* pml4t_t;
 
-constexpr int PRESENT = 0x1;
-constexpr int WRITEABLE = 0x2;
-constexpr int USER = 0x4;
+constexpr const int PRESENT = 0x1;
+constexpr const int WRITEABLE = 0x2;
+constexpr const int USER = 0x4;
 
 //Memory from 0x70000 can be used for pages
 uintptr_t last_page = 0x73000;
 
 uintptr_t init_new_page(){
     auto new_page = last_page + paging::PAGE_SIZE;
+    auto it = reinterpret_cast<size_t*>(new_page);
 
-    memset(reinterpret_cast<void*>(new_page), 0, paging::PAGE_SIZE);
+    std::fill(it, it + paging::PAGE_SIZE / sizeof(size_t), 0);
 
     last_page = new_page;
 

kernel/src/shell.cpp

@@ -25,9 +25,9 @@
 namespace {
 
 #ifdef CONFIG_HISTORY
-static constexpr bool History = true;
+static constexpr const bool History = true;
 #else
-static constexpr bool History = false;
+static constexpr const bool History = false;
 #endif
 
 vector<string> history;

kernel/src/utils.cpp

@@ -8,16 +8,6 @@
 #include "utils.hpp"
 #include "string.hpp"
 
-void memset(void* ptr, unsigned char value, size_t num){
-    auto p = static_cast<unsigned char*>(ptr);
-
-    --p;
-
-    while(num--){
-        *++p = value;
-    }
-}
-
 int memcmp(const void* s1, const void* s2, size_t n){
     auto p1 = static_cast<const unsigned char*>(s1);
     auto p2 = static_cast<const unsigned char*>(s2);