Import all this stuff into a single repo called Serenity.

AK/String.cpp

@@ -0,0 +1,56 @@
+#include "String.h"
+#include <cstring>
+
+namespace AK {
+
+bool String::operator==(const String& other) const
+{
+    if (!m_impl)
+        return !other.m_impl;
+
+    if (!other.m_impl)
+        return false;
+
+    if (length() != other.length())
+        return false;
+    
+    return !memcmp(characters(), other.characters(), length());
+}
+
+String String::empty()
+{
+    return StringImpl::theEmptyStringImpl();
+}
+
+Vector<String> String::split(const char separator) const
+{
+    if (isEmpty())
+        return { };
+
+    Vector<String> parts;
+
+    auto* characters = this->characters();
+    unsigned startOfPart = 0;
+    unsigned i = 0;
+    for (i = 0; i < length(); ++i) {
+        char ch = characters[i];
+        if (ch == separator) {
+            if (i != startOfPart) {
+                parts.append(String(characters + startOfPart, i - startOfPart));
+            }
+            startOfPart = i + 1;
+        }
+    }
+    if (startOfPart != length())
+        parts.append(String(characters + startOfPart, i - startOfPart));
+    return parts;
+}
+
+ByteBuffer String::toByteBuffer() const
+{
+    if (!m_impl)
+        return nullptr;
+    return ByteBuffer::copy(reinterpret_cast<const byte*>(characters()), length());
+}
+
+}