copy paste functions

include/editor_op.h

@@ -3,10 +3,11 @@
 
 #include "data.h"
 
-void bufferInsertNewLine();
-void bufferInsertBytes(char *src, int n);
 void editorSetStatusMessage(const char *fmt, ...);
-void bufferDelBytes();
+int editorRowCharCount(row_t *row, int x);
+int editorRowCxToByte(const row_t *row, int cursor_x);
+char *editorGetClipboard(void);
+void editorSetClipboard(const char *text, int len);
 
 
 #endif // EDITOR_OP_H_