// SPDX-License-Identifier: MIT
// SPDX-FileCopyrightText: 2014 Eric Woroshow

//go:build darwin || windows

package gl

import (
	"runtime"
)

// cStr takes a Go string (with or without null-termination)
// and returns the C counterpart.
//
// The returned free function must be called once you are done using the string
// in order to free the memory.
func cStr(str string) (cstr *byte, free func()) {
	bs := []byte(str)
	if len(bs) == 0 || bs[len(bs)-1] != 0 {
		bs = append(bs, 0)
	}
	return &bs[0], func() {
		runtime.KeepAlive(bs)
		bs = nil
	}
}