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// Copyright 2018 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.
// +build freebsd
package syscall_test
import (
"fmt"
"syscall"
"testing"
"unsafe"
)
func TestConvertFromDirent11(t *testing.T) {
const (
filenameFmt = "%04d"
numFiles = 64
fixedHdrSize = int(unsafe.Offsetof(syscall.Dirent_freebsd11{}.Name))
)
namlen := len(fmt.Sprintf(filenameFmt, 0))
reclen := syscall.Roundup(fixedHdrSize+namlen+1, 4)
old := make([]byte, numFiles*reclen)
for i := 0; i < numFiles; i++ {
dent := syscall.Dirent_freebsd11{
Fileno: uint32(i + 1),
Reclen: uint16(reclen),
Type: syscall.DT_REG,
Namlen: uint8(namlen),
}
rec := make([]byte, reclen)
copy(rec, (*[fixedHdrSize]byte)(unsafe.Pointer(&dent))[:])
copy(rec[fixedHdrSize:], fmt.Sprintf(filenameFmt, i+1))
copy(old[i*reclen:], rec)
}
buf := make([]byte, 2*len(old))
n := syscall.ConvertFromDirents11(buf, old)
names := make([]string, 0, numFiles)
_, _, names = syscall.ParseDirent(buf[:n], -1, names)
if len(names) != numFiles {
t.Errorf("expected %d files, have %d; names: %q", numFiles, len(names), names)
}
for i, name := range names {
if expected := fmt.Sprintf(filenameFmt, i+1); name != expected {
t.Errorf("expected names[%d] to be %q; got %q", i, expected, name)
}
}
}
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