// Copyright 2009 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.

package syscall

/*
 * Foundation of system call interface.
 */

export func Syscall(trap int64, a1, a2, a3 int64) (r1, r2, err int64);
export func Syscall6(trap int64, a1, a2, a3, a4, a5, a6 int64) (r1, r2, err int64);

export func BytePtr(b *byte) int64;
export func Int32Ptr(p *int32) int64;
export func Int64Ptr(p *int64) int64;

/*
 * Used to convert file names to byte arrays for passing to kernel,
 * but useful elsewhere too.
 */
export func StringToBytes(b *[]byte, s string) bool {
	if len(s) >= len(b) {
		return false
	}
	for i := 0; i < len(s); i++ {
		b[i] = s[i]
	}
	b[len(s)] = '\000';	// not necessary - memory is zeroed - but be explicit
	return true
}