// Copyright 2019 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 darwin,go1.12,!go1.13

package unix

import (

	"unsafe"

)

func Getdirentries(fd int, buf []byte, basep *uintptr) (n int, err error) {

	// To implement this using libSystem we'd need syscall_syscallPtr for

	// fdopendir. However, syscallPtr was only added in Go 1.13, so we fall

	// back to raw syscalls for this func on Go 1.12.

	var p unsafe.Pointer

	if len(buf) > 0 {

		p = unsafe.Pointer(&buf[0])

	} else {

		p = unsafe.Pointer(&_zero)

	}

	r0, _, e1 := Syscall6(SYS_GETDIRENTRIES64, uintptr(fd), uintptr(p), uintptr(len(buf)), uintptr(unsafe.Pointer(basep)), 0, 0)

	n = int(r0)

	if e1 != 0 {

		return n, errnoErr(e1)

	}

	return n, nil

}