Buffer: Add an append_data() method

libluna/include/luna/Buffer.h

@@ -19,6 +19,8 @@ class Buffer
 
     Result<u8*> slice(usize offset, usize size);
 
+    Result<void> append_data(u8* data, usize size);
+
     u8* data()
     {
         return m_data;

libluna/src/Buffer.cpp

@@ -1,4 +1,5 @@
 #include <luna/Buffer.h>
+#include <luna/CString.h>
 #include <luna/Heap.h>
 
 Buffer::Buffer()
@@ -44,3 +45,10 @@ Result<u8*> Buffer::slice(usize offset, usize size)
     if (offset + size > m_size) { TRY(try_resize(offset + size)); }
     return m_data + offset;
 }
+
+Result<void> Buffer::append_data(u8* data, usize size)
+{
+    memcpy(TRY(slice_at_end(size)), data, size);
+
+    return {};
+}