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go/misc/cgo/stdio/file.go
Shenghou Ma 1e95429c3f misc/cgo/{life,stdio}, test/run.go: use test/run.go to do the cgo tests
Enhances test/run.go to support testing other directories
   Will enable stdio tests on Windows in a follow-up CL.

R=golang-dev, alex.brainman, rsc
CC=golang-dev
https://golang.org/cl/6220049
2012-08-07 09:38:35 +08:00

45 lines
875 B
Go

// skip
// 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
// Test reference to library symbol.
// Stdout and stderr are too special to be a reliable test.
//var = C.environ
func (f *File) WriteString(s string) {
p := C.CString(s)
C.fputs(p, (*C.FILE)(f))
C.free(unsafe.Pointer(p))
f.Flush()
}
func (f *File) Flush() {
C.fflush((*C.FILE)(f))
}
var Greeting = C.GoString(C.greeting)
var Gbytes = C.GoBytes(unsafe.Pointer(C.greeting), C.int(len(Greeting)))