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Source file src/syscall/syscall_windows_test.go

Documentation: syscall

  // Copyright 2012 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.
  
  package syscall_test
  
  import (
  	"io/ioutil"
  	"os"
  	"path/filepath"
  	"syscall"
  	"testing"
  )
  
  func TestWin32finddata(t *testing.T) {
  	dir, err := ioutil.TempDir("", "go-build")
  	if err != nil {
  		t.Fatalf("failed to create temp directory: %v", err)
  	}
  	defer os.RemoveAll(dir)
  
  	path := filepath.Join(dir, "long_name.and_extension")
  	f, err := os.Create(path)
  	if err != nil {
  		t.Fatalf("failed to create %v: %v", path, err)
  	}
  	f.Close()
  
  	type X struct {
  		fd  syscall.Win32finddata
  		got byte
  		pad [10]byte // to protect ourselves
  
  	}
  	var want byte = 2 // it is unlikely to have this character in the filename
  	x := X{got: want}
  
  	pathp, _ := syscall.UTF16PtrFromString(path)
  	h, err := syscall.FindFirstFile(pathp, &(x.fd))
  	if err != nil {
  		t.Fatalf("FindFirstFile failed: %v", err)
  	}
  	err = syscall.FindClose(h)
  	if err != nil {
  		t.Fatalf("FindClose failed: %v", err)
  	}
  
  	if x.got != want {
  		t.Fatalf("memory corruption: want=%d got=%d", want, x.got)
  	}
  }
  
  func abort(funcname string, err error) {
  	panic(funcname + " failed: " + err.Error())
  }
  
  func ExampleLoadLibrary() {
  	h, err := syscall.LoadLibrary("kernel32.dll")
  	if err != nil {
  		abort("LoadLibrary", err)
  	}
  	defer syscall.FreeLibrary(h)
  	proc, err := syscall.GetProcAddress(h, "GetVersion")
  	if err != nil {
  		abort("GetProcAddress", err)
  	}
  	r, _, _ := syscall.Syscall(uintptr(proc), 0, 0, 0, 0)
  	major := byte(r)
  	minor := uint8(r >> 8)
  	build := uint16(r >> 16)
  	print("windows version ", major, ".", minor, " (Build ", build, ")\n")
  }
  

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