package unix

import (
	"syscall"
	"unsafe"
)

func CopyFileRange(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int, err error) {
	r1, _, errno := syscall.Syscall6(copyFileRangeTrap,
		uintptr(rfd),
		uintptr(unsafe.Pointer(roff)),
		uintptr(wfd),
		uintptr(unsafe.Pointer(woff)),
		uintptr(len),
		uintptr(flags),
	)
	n = int(r1)
	if errno != 0 {
		err = errno
	}
	return

		ct:   "application/vnd.ms-fontobject",
	},
	&exactSig{[]byte("\x00\x01\x00\x00"), "font/ttf"},
	&exactSig{[]byte("OTTO"), "font/otf"},
	&exactSig{[]byte("ttcf"), "font/collection"},
	&exactSig{[]byte("wOFF"), "font/woff"},
	&exactSig{[]byte("wOF2"), "font/woff2"},

	// Archive types
	&exactSig{[]byte("\x1F\x8B\x08"), "application/x-gzip"},
	&exactSig{[]byte("PK\x03\x04"), "application/zip"},

	{"OTTO sample  I", []byte("\x4f\x54\x54\x4f\x00\x0e\x00\x80\x00\x03\x00\x60\x42\x41\x53\x45"), "font/otf"},

	{"woff sample  I", []byte("\x77\x4f\x46\x46\x00\x01\x00\x00\x00\x00\x30\x54\x00\x0d\x00\x00"), "font/woff"},
	{"woff2 sample", []byte("\x77\x4f\x46\x32\x00\x01\x00\x00\x00"), "font/woff2"},
	{"wasm sample", []byte("\x00\x61\x73\x6d\x01\x00"), "application/wasm"},

	// Archive types

//sys	setfsgid(gid int) (prev int, err error)
//sys	setfsuid(uid int) (prev int, err error)
//sys	Shutdown(fd int, how int) (err error)
//sys	Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int64, err error)
//sys	Stat(path string, stat *Stat_t) (err error)
//sys	Statfs(path string, buf *Statfs_t) (err error)
//sys	SyncFileRange(fd int, off int64, n int64, flags int) (err error)

//sys	Setfsgid(gid int) (err error)
//sys	Setfsuid(uid int) (err error)
//sysnb	setrlimit(resource int, rlim *Rlimit) (err error) = SYS_SETRLIMIT
//sys	Shutdown(fd int, how int) (err error)
//sys	Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int64, err error)
//sys	Stat(path string, stat *Stat_t) (err error)
//sys	Statfs(path string, buf *Statfs_t) (err error)
//sys	Truncate(path string, length int64) (err error)

//sys	setfsgid(gid int) (prev int, err error)
//sys	setfsuid(uid int) (prev int, err error)
//sys	Shutdown(fd int, how int) (err error)
//sys	Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int64, err error)
//sys	Stat(path string, stat *Stat_t) (err error)
//sys	Statfs(path string, buf *Statfs_t) (err error)
//sys	Truncate(path string, length int64) (err error)

//sys	Setfsgid(gid int) (err error)
//sys	Setfsuid(uid int) (err error)
//sysnb	setrlimit(resource int, rlim *Rlimit) (err error) = SYS_SETRLIMIT
//sys	Shutdown(fd int, how int) (err error)
//sys	Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int64, err error)
//sys	Statfs(path string, buf *Statfs_t) (err error)
//sys	SyncFileRange(fd int, off int64, n int64, flags int) (err error)
//sys	Truncate(path string, length int64) (err error)

//sys	setfsgid(gid int) (prev int, err error)
//sys	setfsuid(uid int) (prev int, err error)
//sys	Shutdown(fd int, how int) (err error)
//sys	Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int64, err error)

func Stat(path string, stat *Stat_t) (err error) {
	// Use fstatat, because Android's seccomp policy blocks stat.
	return Fstatat(AT_FDCWD, path, stat, 0)
}

//sys	setfsgid(gid int) (prev int, err error)
//sys	setfsuid(uid int) (prev int, err error)
//sys	Shutdown(fd int, how int) (err error)
//sys	Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int64, err error)

func Stat(path string, stat *Stat_t) (err error) {
	return Fstatat(AT_FDCWD, path, stat, 0)
}

func Lchown(path string, uid int, gid int) (err error) {

//sys	setfsgid(gid int) (prev int, err error)
//sys	setfsuid(uid int) (prev int, err error)
//sys	Shutdown(fd int, how int) (err error)
//sys	Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int, err error)
//sys	SyncFileRange(fd int, off int64, n int64, flags int) (err error)
//sys	Truncate(path string, length int64) (err error) = SYS_TRUNCATE64