--- a/src/c-file-ptr-stream.h
+++ b/src/c-file-ptr-stream.h
@@ -28,29 +28,43 @@
 #endif
 
 #include <iostream>
-#include <stdio.h>
+#include <fstream>
+#include <cstdio>
 
 class
 c_file_ptr_buf : public std::filebuf
 {
 public:
 
+#if !defined (CXX_ISO_COMPLIANT_LIBRARY)
+  typedef int int_type;
+#endif
+
   typedef int (*close_fcn) (FILE *);
 
   FILE* stdiofile (void) const { return f; }
 
   c_file_ptr_buf (FILE *f_arg, close_fcn cf_arg = ::fclose)
-    : std::filebuf (f_arg ? fileno (f_arg) : -1), f (f_arg), cf (cf_arg) { }
+    : 
+#ifdef __SUNPRO_CC
+    std::filebuf (f_arg ? fileno (f_arg) : -1),
+#else
+    std::filebuf (f_arg ? fileno (f_arg) : -1,
+                  0, std::ios::in | std::ios::out),
+#endif
+    f (f_arg), cf (cf_arg),
+    fd (f_arg ? fileno (f_arg) : -1)
+    { }
 
   ~c_file_ptr_buf (void);
 
-  int overflow (int);
+  int_type overflow (int_type);
 
-  int underflow (void);
+  int_type underflow (void);
 
-  int uflow (void);
+  int_type uflow (void);
 
-  int pbackfail (int);
+  int_type pbackfail (int_type);
 
   std::streamsize xsputn (const char*, std::streamsize);
 
@@ -68,11 +82,17 @@
 
   int close (void);
 
+  int file_number () const { return fd; }
+
 protected:
 
   FILE *f;
 
   close_fcn cf;
+
+private:
+
+  int fd;
 };
 
 class
@@ -81,7 +101,7 @@
 public:
 
   i_c_file_ptr_stream (FILE* f, c_file_ptr_buf::close_fcn cf = ::fclose)
-    : std::istream (), buf (new c_file_ptr_buf (f, cf)) { init (buf); }
+    : std::istream (0), buf (new c_file_ptr_buf (f, cf)) { init (buf); }
 
   ~i_c_file_ptr_stream (void) { delete buf; buf = 0; }
 
@@ -100,7 +120,7 @@
 public:
 
   o_c_file_ptr_stream (FILE* f, c_file_ptr_buf::close_fcn cf = ::fclose)
-    : std::ostream (), buf (new c_file_ptr_buf (f, cf)) { init (buf); }
+    : std::ostream (0), buf (new c_file_ptr_buf (f, cf)) { init (buf); }
 
   ~o_c_file_ptr_stream (void) { delete buf; buf = 0; }