[lib] add pcf writer

libopenfpga/libpcf/src/io/pcf_writer.h

@@ -0,0 +1,21 @@
+#ifndef PCF_WRITER_H
+#define PCF_WRITER_H
+/********************************************************************
+ * Include header files required by the data structure definition
+ *******************************************************************/
+#include <stddef.h>
+#include <array>
+#include <map>
+#include <fstream>
+#include "pcf_data.h"
+
+/* Begin namespace openfpga */
+namespace openfpga {
+
+/* Write a .pcf file from an object */
+int write_pcf(const char* fname,
+              const PcfData& pcf_data);
+ 
+} /* End namespace openfpga*/
+
+#endif