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// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
A trivial example of wrapping a C library in Go.
For a more complex example and explanation,
see ../gmp/gmp.go.
package stdio
#include <stdio.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <errno.h>
char* greeting = "hello, world";
import "C"
import "unsafe"
type File C.FILE
var Stdout = (*File)(C.stdout)
var Stderr = (*File)(C.stderr)
// Test reference to library symbol.
// Stdout and stderr are too special to be a reliable test.
var myerr = C.sys_errlist
func (f *File) WriteString(s string) {
p := C.CString(s)
C.fputs(p, (*C.FILE)(f))
func (f *File) Flush() {
var Greeting = C.GoString(C.greeting)