Use _strto{i,u} in _atou and _atos

luna/NumberParsing.cpp

@@ -1,42 +1,5 @@
 #include <NumberParsing.h>
 
-usize _atou(const char** str)
-{
-    usize val = 0;
-
-    while (_isdigit(**str))
-    {
-        val = (10 * val) + (**str - '0');
-        (*str)++;
-    }
-
-    return val;
-}
-
-isize _atos(const char** str)
-{
-    bool neg = false;
-    isize val = 0;
-
-    switch (**str)
-    {
-    case '-':
-        neg = true;
-        (*str)++;
-        break;
-    case '+': (*str)++; break;
-    default: break;
-    }
-
-    while (_isdigit(**str))
-    {
-        val = (10 * val) + (**str - '0');
-        (*str)++;
-    }
-
-    return neg ? -val : val;
-}
-
 // This function assumes you have called is_valid_digit_for_base() to validate the digit first.
 static isize parse_digit_unchecked(char c)
 {
@@ -100,3 +63,13 @@ isize _strtoi(const char* str, const char** endptr, int base)
 
     return negative ? -(isize)rc : (isize)rc;
 }
+
+usize _atou(const char** str)
+{
+    return _strtou(*str, str, 10);
+}
+
+isize _atos(const char** str)
+{
+    return _strtoi(*str, str, 10);
+}