String: Add a new constructor

src/common/string.cpp

@@ -161,6 +161,11 @@ String::String(const char* Text) : m_pStringData(const_cast<String::StringData*>
   Assign(Text);
 }
 
+String::String(const char* Text, u32 Count) : m_pStringData(const_cast<String::StringData*>(&s_EmptyStringData))
+{
+  AppendString(Text, Count);
+}
+
 String::String(String&& moveString)
 {
   Assign(moveString);

src/common/string.h

@@ -46,6 +46,9 @@ public:
   // For strings that do not allocate any space on the heap, see StaticString.
   String(const char* Text);
 
+  // Creates a string contained the specified text (with length).
+  String(const char* Text, u32 Count);
+
   // Creates a string using the same buffer as another string (copy-on-write).
   String(const String& copyString);
 
@@ -315,6 +318,12 @@ public:
     Assign(Text);
   }
 
+  StackString(const char* Text, u32 Count) : String(&m_sStringData)
+  {
+    InitStackStringData();
+    AppendString(Text, Count);
+  }
+
   StackString(const String& copyString) : String(&m_sStringData)
   {
     // force a copy by passing it a string pointer, instead of a string object