// GetSystemDirectory retrieves the path to current location of the system
// directory, which is typically, though not always, `C:\Windows\System32`.
//
//go:linkname GetSystemDirectory

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package net

import (
	"internal/syscall/windows"
	"syscall"
)

var (
	hostsFilePath = windows.GetSystemDirectory() + "/Drivers/etc/hosts"

	// Placeholders for socket system calls.
	wsaSocketFunc func(int32, int32, int32, *syscall.WSAProtocolInfo, uint32, uint32) (syscall.Handle, error) = windows.WSASocket

		return Token(0), err
	}
	return linkedToken, nil
}

// GetSystemDirectory retrieves the path to current location of the system
// directory, which is typically, though not always, `C:\Windows\System32`.
func GetSystemDirectory() (string, error) {
	n := uint32(MAX_PATH)
	for {
		b := make([]uint16, n)
		l, e := getSystemDirectory(&b[0], n)
		if e != nil {
			return "", e
		}
		if l <= n {

			// WindowsXP or unpatched Windows machine
			// trying to load "foo.dll" out of the system
			// folder, but LoadLibraryEx doesn't support
			// that yet on their system, so emulate it.
			systemdir, err := GetSystemDirectory()
			if err != nil {
				return nil, err
			}
			loadDLL = systemdir + "\\" + name
		}
	}
	h, err := LoadLibraryEx(loadDLL, 0, flags)
	if err != nil {
		return nil, err
	}

		throw("Unable to determine system directory")
	}
	sysDirectory[l] = '\\'
	sysDirectoryLen = l + 1
}

//go:linkname windows_GetSystemDirectory internal/syscall/windows.GetSystemDirectory
func windows_GetSystemDirectory() string {
	return unsafe.String(&sysDirectory[0], sysDirectoryLen)
}

func windowsLoadSystemLib(name []uint16) uintptr {

	r0, _, e1 := syscall.Syscall(procGetStdHandle.Addr(), 1, uintptr(stdhandle), 0, 0)
	handle = Handle(r0)
	if handle == InvalidHandle {
		err = errnoErr(e1)
	}
	return
}

func getSystemDirectory(dir *uint16, dirLen uint32) (len uint32, err error) {
	r0, _, e1 := syscall.Syscall(procGetSystemDirectoryW.Addr(), 2, uintptr(unsafe.Pointer(dir)), uintptr(dirLen), 0)
	len = uint32(r0)
	if len == 0 {