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// $G $F.go && $L $F.$A && ./$A.out
// 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.
// Semi-exhaustive test for copy()
package main
import (
"fmt"
"os"
)
const N = 40
var input8 = make([]uint8, N)
var output8 = make([]uint8, N)
var input16 = make([]uint16, N)
var output16 = make([]uint16, N)
var input32 = make([]uint32, N)
var output32 = make([]uint32, N)
var input64 = make([]uint64, N)
var output64 = make([]uint64, N)
func u8(i int) uint8 {
i = 'a' + i%26
return uint8(i)
}
func u16(ii int) uint16 {
var i = uint16(ii)
i = 'a' + i%26
i |= i << 8
return i
}
func u32(ii int) uint32 {
var i = uint32(ii)
i = 'a' + i%26
i |= i << 8
i |= i << 16
return i
}
func u64(ii int) uint64 {
var i = uint64(ii)
i = 'a' + i%26
i |= i << 8
i |= i << 16
i |= i << 32
return i
}
func reset() {
// swap in and out to exercise copy-up and copy-down
input8, output8 = output8, input8
input16, output16 = output16, input16
input32, output32 = output32, input32
input64, output64 = output64, input64
in := 0
out := 13
for i := range input8 {
input8[i] = u8(in)
output8[i] = u8(out)
input16[i] = u16(in)
output16[i] = u16(out)
input32[i] = u32(in)
output32[i] = u32(out)
input64[i] = u64(in)
output64[i] = u64(out)
in++
out++
}
}
func clamp(n int) int {
if n > N {
return N
}
return n
}
func ncopied(length, in, out int) int {
n := length
if in+n > N {
n = N - in
}
if out+n > N {
n = N - out
}
return n
}
func doAllSlices(length, in, out int) {
reset()
n := copy(output8[out:clamp(out+length)], input8[in:clamp(in+length)])
verify8(length, in, out, n)
n = copy(output16[out:clamp(out+length)], input16[in:clamp(in+length)])
verify16(length, in, out, n)
n = copy(output32[out:clamp(out+length)], input32[in:clamp(in+length)])
verify32(length, in, out, n)
n = copy(output64[out:clamp(out+length)], input64[in:clamp(in+length)])
verify64(length, in, out, n)
}
func bad8(state string, i, length, in, out int) {
fmt.Printf("%s bad(%d %d %d): %c not %c:\n\t%s\n\t%s\n",
state,
length, in, out,
output8[i],
uint8(i+13),
input8, output8)
os.Exit(1)
}
func verify8(length, in, out, m int) {
n := ncopied(length, in, out)
if m != n {
fmt.Printf("count bad(%d %d %d): %d not %d\n", length, in, out, m, n)
return
}
// before
var i int
for i = 0; i < out; i++ {
if output8[i] != u8(i+13) {
bad8("before8", i, length, in, out)
return
}
}
// copied part
for ; i < out+n; i++ {
if output8[i] != u8(i+in-out) {
bad8("copied8", i, length, in, out)
return
}
}
// after
for ; i < len(output8); i++ {
if output8[i] != u8(i+13) {
bad8("after8", i, length, in, out)
return
}
}
}
func bad16(state string, i, length, in, out int) {
fmt.Printf("%s bad(%d %d %d): %x not %x:\n\t%v\n\t%v\n",
state,
length, in, out,
output16[i],
uint16(i+13),
input16, output16)
os.Exit(1)
}
func verify16(length, in, out, m int) {
n := ncopied(length, in, out)
if m != n {
fmt.Printf("count bad(%d %d %d): %d not %d\n", length, in, out, m, n)
return
}
// before
var i int
for i = 0; i < out; i++ {
if output16[i] != u16(i+13) {
bad16("before16", i, length, in, out)
return
}
}
// copied part
for ; i < out+n; i++ {
if output16[i] != u16(i+in-out) {
bad16("copied16", i, length, in, out)
return
}
}
// after
for ; i < len(output16); i++ {
if output16[i] != u16(i+13) {
bad16("after16", i, length, in, out)
return
}
}
}
func bad32(state string, i, length, in, out int) {
fmt.Printf("%s bad(%d %d %d): %x not %x:\n\t%v\n\t%v\n",
state,
length, in, out,
output32[i],
uint32(i+13),
input32, output32)
os.Exit(1)
}
func verify32(length, in, out, m int) {
n := ncopied(length, in, out)
if m != n {
fmt.Printf("count bad(%d %d %d): %d not %d\n", length, in, out, m, n)
return
}
// before
var i int
for i = 0; i < out; i++ {
if output32[i] != u32(i+13) {
bad32("before32", i, length, in, out)
return
}
}
// copied part
for ; i < out+n; i++ {
if output32[i] != u32(i+in-out) {
bad32("copied32", i, length, in, out)
return
}
}
// after
for ; i < len(output32); i++ {
if output32[i] != u32(i+13) {
bad32("after32", i, length, in, out)
return
}
}
}
func bad64(state string, i, length, in, out int) {
fmt.Printf("%s bad(%d %d %d): %x not %x:\n\t%v\n\t%v\n",
state,
length, in, out,
output64[i],
uint64(i+13),
input64, output64)
os.Exit(1)
}
func verify64(length, in, out, m int) {
n := ncopied(length, in, out)
if m != n {
fmt.Printf("count bad(%d %d %d): %d not %d\n", length, in, out, m, n)
return
}
// before
var i int
for i = 0; i < out; i++ {
if output64[i] != u64(i+13) {
bad64("before64", i, length, in, out)
return
}
}
// copied part
for ; i < out+n; i++ {
if output64[i] != u64(i+in-out) {
bad64("copied64", i, length, in, out)
return
}
}
// after
for ; i < len(output64); i++ {
if output64[i] != u64(i+13) {
bad64("after64", i, length, in, out)
return
}
}
}
func slice() {
for length := 0; length < N; length++ {
for in := 0; in <= 32; in++ {
for out := 0; out <= 32; out++ {
doAllSlices(length, in, out)
}
}
}
}
// Array test. Can be much simpler. It's only checking for correct handling of [0:].
func array() {
var array [N]uint8
reset()
copy(array[0:], input8)
for i := 0; i < N; i++ {
output8[i] = 0
}
copy(output8, array[0:])
verify8(N, 0, 0, N)
}
func main() {
slice()
array()
}
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