// Copyright 2018 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build freebsd
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package syscall_test
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import (
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"fmt"
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"syscall"
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"testing"
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"unsafe"
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)
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func TestConvertFromDirent11(t *testing.T) {
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const (
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filenameFmt = "%04d"
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numFiles = 64
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fixedHdrSize = int(unsafe.Offsetof(syscall.Dirent_freebsd11{}.Name))
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)
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namlen := len(fmt.Sprintf(filenameFmt, 0))
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reclen := syscall.Roundup(fixedHdrSize+namlen+1, 4)
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old := make([]byte, numFiles*reclen)
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for i := 0; i < numFiles; i++ {
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dent := syscall.Dirent_freebsd11{
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Fileno: uint32(i + 1),
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Reclen: uint16(reclen),
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Type: syscall.DT_REG,
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Namlen: uint8(namlen),
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}
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rec := make([]byte, reclen)
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copy(rec, (*[fixedHdrSize]byte)(unsafe.Pointer(&dent))[:])
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copy(rec[fixedHdrSize:], fmt.Sprintf(filenameFmt, i+1))
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copy(old[i*reclen:], rec)
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}
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buf := make([]byte, 2*len(old))
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n := syscall.ConvertFromDirents11(buf, old)
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names := make([]string, 0, numFiles)
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_, _, names = syscall.ParseDirent(buf[:n], -1, names)
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if len(names) != numFiles {
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t.Errorf("expected %d files, have %d; names: %q", numFiles, len(names), names)
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}
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for i, name := range names {
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if expected := fmt.Sprintf(filenameFmt, i+1); name != expected {
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t.Errorf("expected names[%d] to be %q; got %q", i, expected, name)
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}
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}
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}
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