mirror of
https://github.com/golang/go
synced 2024-11-12 04:40:22 -07:00
casify a few more
R=rsc DELTA=72 (0 added, 9 deleted, 63 changed) OCL=22918 CL=22941
This commit is contained in:
parent
393df07914
commit
4b590bf985
@ -18,7 +18,7 @@ func min(a, b int) int {
|
||||
}
|
||||
|
||||
// Insertion sort
|
||||
func InsertionSort(data SortInterface, a, b int) {
|
||||
func insertionSort(data SortInterface, a, b int) {
|
||||
for i := a+1; i < b; i++ {
|
||||
for j := i; j > a && data.Less(j, j-1); j-- {
|
||||
data.Swap(j, j-1);
|
||||
@ -30,7 +30,7 @@ func InsertionSort(data SortInterface, a, b int) {
|
||||
// ``Engineering a Sort Function,'' SP&E November 1993.
|
||||
|
||||
// Move the median of the three values data[a], data[b], data[c] into data[a].
|
||||
func MedianOfThree(data SortInterface, a, b, c int) {
|
||||
func medianOfThree(data SortInterface, a, b, c int) {
|
||||
m0 := b;
|
||||
m1 := a;
|
||||
m2 := c;
|
||||
@ -41,22 +41,22 @@ func MedianOfThree(data SortInterface, a, b, c int) {
|
||||
// now data[m0] <= data[m1] <= data[m2]
|
||||
}
|
||||
|
||||
func SwapRange(data SortInterface, a, b, n int) {
|
||||
func swapRange(data SortInterface, a, b, n int) {
|
||||
for i := 0; i < n; i++ {
|
||||
data.Swap(a+i, b+i);
|
||||
}
|
||||
}
|
||||
|
||||
func Pivot(data SortInterface, lo, hi int) (midlo, midhi int) {
|
||||
func doPivot(data SortInterface, lo, hi int) (midlo, midhi int) {
|
||||
m := (lo+hi)/2;
|
||||
if hi - lo > 40 {
|
||||
// Tukey's ``Ninther,'' median of three medians of three.
|
||||
s := (hi - lo) / 8;
|
||||
MedianOfThree(data, lo, lo+s, lo+2*s);
|
||||
MedianOfThree(data, m, m-s, m+s);
|
||||
MedianOfThree(data, hi-1, hi-1-s, hi-1-2*s);
|
||||
medianOfThree(data, lo, lo+s, lo+2*s);
|
||||
medianOfThree(data, m, m-s, m+s);
|
||||
medianOfThree(data, hi-1, hi-1-s, hi-1-2*s);
|
||||
}
|
||||
MedianOfThree(data, lo, m, hi-1);
|
||||
medianOfThree(data, lo, m, hi-1);
|
||||
|
||||
// Invariants are:
|
||||
// data[lo] = pivot (set up by ChoosePivot)
|
||||
@ -98,26 +98,26 @@ func Pivot(data SortInterface, lo, hi int) (midlo, midhi int) {
|
||||
}
|
||||
|
||||
n := min(b-a, a-lo);
|
||||
SwapRange(data, lo, b-n, n);
|
||||
swapRange(data, lo, b-n, n);
|
||||
|
||||
n = min(hi-d, d-c);
|
||||
SwapRange(data, c, hi-n, n);
|
||||
swapRange(data, c, hi-n, n);
|
||||
|
||||
return lo+b-a, hi-(d-c);
|
||||
}
|
||||
|
||||
func Quicksort(data SortInterface, a, b int) {
|
||||
func quickSort(data SortInterface, a, b int) {
|
||||
if b - a > 7 {
|
||||
mlo, mhi := Pivot(data, a, b);
|
||||
Quicksort(data, a, mlo);
|
||||
Quicksort(data, mhi, b);
|
||||
mlo, mhi := doPivot(data, a, b);
|
||||
quickSort(data, a, mlo);
|
||||
quickSort(data, mhi, b);
|
||||
} else if b - a > 1 {
|
||||
InsertionSort(data, a, b);
|
||||
insertionSort(data, a, b);
|
||||
}
|
||||
}
|
||||
|
||||
export func Sort(data SortInterface) {
|
||||
Quicksort(data, 0, data.Len());
|
||||
quickSort(data, 0, data.Len());
|
||||
}
|
||||
|
||||
|
||||
|
@ -11,8 +11,6 @@ import (
|
||||
"testing";
|
||||
)
|
||||
|
||||
func BentleyMcIlroyTests();
|
||||
|
||||
|
||||
var ints = [...]int{74, 59, 238, -784, 9845, 959, 905, 0, 0, 42, 7586, -5467984, 7586}
|
||||
var floats = [...]float{74.3, 59.0, 238.2, -784.0, 2.3, 9845.768, -959.7485, 905, 7.8, 7.8}
|
||||
@ -75,7 +73,7 @@ export func TestSortStrings(t *testing.T) {
|
||||
}
|
||||
}
|
||||
|
||||
export func TestSortLargeRandom(t *testing.T) {
|
||||
export func TestSortLarge_Random(t *testing.T) {
|
||||
data := make([]int, 1000000);
|
||||
for i := 0; i < len(data); i++ {
|
||||
data[i] = rand.rand() % 100;
|
||||
@ -90,25 +88,25 @@ export func TestSortLargeRandom(t *testing.T) {
|
||||
}
|
||||
|
||||
const (
|
||||
Sawtooth = iota;
|
||||
Rand;
|
||||
Stagger;
|
||||
Plateau;
|
||||
Shuffle;
|
||||
NDist;
|
||||
_Sawtooth = iota;
|
||||
_Rand;
|
||||
_Stagger;
|
||||
_Plateau;
|
||||
_Shuffle;
|
||||
_NDist;
|
||||
)
|
||||
|
||||
const (
|
||||
Copy = iota;
|
||||
Reverse;
|
||||
ReverseFirstHalf;
|
||||
ReverseSecondHalf;
|
||||
Sorted;
|
||||
Dither;
|
||||
NMode;
|
||||
);
|
||||
_Copy = iota;
|
||||
_Reverse;
|
||||
_ReverseFirstHalf;
|
||||
_ReverseSecondHalf;
|
||||
_Sorted;
|
||||
_Dither;
|
||||
_NMode;
|
||||
)
|
||||
|
||||
type TestingData struct {
|
||||
type testingData struct {
|
||||
desc string;
|
||||
t *testing.T;
|
||||
data []int;
|
||||
@ -116,9 +114,9 @@ type TestingData struct {
|
||||
nswap int;
|
||||
}
|
||||
|
||||
func (d *TestingData) Len() int { return len(d.data); }
|
||||
func (d *TestingData) Less(i, j int) bool { return d.data[i] < d.data[j]; }
|
||||
func (d *TestingData) Swap(i, j int) {
|
||||
func (d *testingData) Len() int { return len(d.data); }
|
||||
func (d *testingData) Less(i, j int) bool { return d.data[i] < d.data[j]; }
|
||||
func (d *testingData) Swap(i, j int) {
|
||||
if d.nswap >= d.maxswap {
|
||||
d.t.Errorf("%s: used %d swaps sorting array of %d", d.desc, d.nswap, len(d.data));
|
||||
d.t.FailNow();
|
||||
@ -127,7 +125,7 @@ func (d *TestingData) Swap(i, j int) {
|
||||
d.data[i], d.data[j] = d.data[j], d.data[i];
|
||||
}
|
||||
|
||||
func Lg(n int) int {
|
||||
func lg(n int) int {
|
||||
i := 0;
|
||||
for 1<<uint(i) < n {
|
||||
i++;
|
||||
@ -135,13 +133,6 @@ func Lg(n int) int {
|
||||
return i;
|
||||
}
|
||||
|
||||
func Min(a, b int) int {
|
||||
if a < b {
|
||||
return a;
|
||||
}
|
||||
return b;
|
||||
}
|
||||
|
||||
export func TestBentleyMcIlroy(t *testing.T) {
|
||||
sizes := []int{100, 1023, 1024, 1025};
|
||||
dists := []string{"sawtooth", "rand", "stagger", "plateau", "shuffle"};
|
||||
@ -150,21 +141,21 @@ export func TestBentleyMcIlroy(t *testing.T) {
|
||||
for ni := 0; ni < len(sizes); ni++ {
|
||||
n := sizes[ni];
|
||||
for m := 1; m < 2*n; m *= 2 {
|
||||
for dist := 0; dist < NDist; dist++ {
|
||||
for dist := 0; dist < _NDist; dist++ {
|
||||
j := 0;
|
||||
k := 1;
|
||||
data := tmp1[0:n];
|
||||
for i := 0; i < n; i++ {
|
||||
switch dist {
|
||||
case Sawtooth:
|
||||
case _Sawtooth:
|
||||
data[i] = i % m;
|
||||
case Rand:
|
||||
case _Rand:
|
||||
data[i] = rand.rand() % m;
|
||||
case Stagger:
|
||||
case _Stagger:
|
||||
data[i] = (i*m + i) % n;
|
||||
case Plateau:
|
||||
data[i] = Min(i, m);
|
||||
case Shuffle:
|
||||
case _Plateau:
|
||||
data[i] = min(i, m);
|
||||
case _Shuffle:
|
||||
if rand.rand() % m != 0 {
|
||||
j += 2;
|
||||
data[i] = j;
|
||||
@ -176,45 +167,45 @@ export func TestBentleyMcIlroy(t *testing.T) {
|
||||
}
|
||||
|
||||
mdata := tmp2[0:n];
|
||||
for mode := 0; mode < NMode; mode++ {
|
||||
for mode := 0; mode < _NMode; mode++ {
|
||||
switch mode {
|
||||
case Copy:
|
||||
case _Copy:
|
||||
for i := 0; i < n; i++ {
|
||||
mdata[i] = data[i];
|
||||
}
|
||||
case Reverse:
|
||||
case _Reverse:
|
||||
for i := 0; i < n; i++ {
|
||||
mdata[i] = data[n-i-1];
|
||||
}
|
||||
case ReverseFirstHalf:
|
||||
case _ReverseFirstHalf:
|
||||
for i := 0; i < n/2; i++ {
|
||||
mdata[i] = data[n/2-i-1];
|
||||
}
|
||||
for i := n/2; i < n; i++ {
|
||||
mdata[i] = data[i];
|
||||
}
|
||||
case ReverseSecondHalf:
|
||||
case _ReverseSecondHalf:
|
||||
for i := 0; i < n/2; i++ {
|
||||
mdata[i] = data[i];
|
||||
}
|
||||
for i := n/2; i < n; i++ {
|
||||
mdata[i] = data[n-(i-n/2)-1];
|
||||
}
|
||||
case Sorted:
|
||||
case _Sorted:
|
||||
for i := 0; i < n; i++ {
|
||||
mdata[i] = data[i];
|
||||
}
|
||||
// sort.SortInts is known to be correct
|
||||
// because mode Sort runs after mode Copy.
|
||||
// because mode Sort runs after mode _Copy.
|
||||
sort.SortInts(mdata);
|
||||
case Dither:
|
||||
case _Dither:
|
||||
for i := 0; i < n; i++ {
|
||||
mdata[i] = data[i] + i%5;
|
||||
}
|
||||
}
|
||||
|
||||
desc := fmt.Sprintf("n=%d m=%d dist=%s mode=%s", n, m, dists[dist], modes[mode]);
|
||||
d := &TestingData{desc, t, mdata[0:n], n*Lg(n)*12/10, 0};
|
||||
d := &testingData{desc, t, mdata[0:n], n*lg(n)*12/10, 0};
|
||||
sort.Sort(d);
|
||||
|
||||
// If we were testing C qsort, we'd have to make a copy
|
||||
|
@ -12,10 +12,10 @@ import (
|
||||
var chatty = flag.Bool("chatty", false, "chatty")
|
||||
|
||||
// Insert tabs after newlines - but not the last one
|
||||
func Tabify(s string) string {
|
||||
func tabify(s string) string {
|
||||
for i := 0; i < len(s) - 1; i++ { // -1 because if last char is newline, don't bother
|
||||
if s[i] == '\n' {
|
||||
return s[0:i+1] + "\t" + Tabify(s[i+1:len(s)]);
|
||||
return s[0:i+1] + "\t" + tabify(s[i+1:len(s)]);
|
||||
}
|
||||
}
|
||||
return s
|
||||
@ -38,11 +38,11 @@ func (t *T) FailNow() {
|
||||
}
|
||||
|
||||
func (t *T) Log(args ...) {
|
||||
t.errors += "\t" + Tabify(fmt.Sprintln(args));
|
||||
t.errors += "\t" + tabify(fmt.Sprintln(args));
|
||||
}
|
||||
|
||||
func (t *T) Logf(format string, args ...) {
|
||||
t.errors += Tabify(fmt.Sprintf("\t" + format, args));
|
||||
t.errors += tabify(fmt.Sprintf("\t" + format, args));
|
||||
l := len(t.errors);
|
||||
if l > 0 && t.errors[l-1] != '\n' {
|
||||
t.errors += "\n"
|
||||
@ -74,7 +74,7 @@ export type Test struct {
|
||||
f *(*T);
|
||||
}
|
||||
|
||||
func TRunner(t *T, test *Test) {
|
||||
func tRunner(t *T, test *Test) {
|
||||
test.f(t);
|
||||
t.ch <- t;
|
||||
}
|
||||
@ -91,7 +91,7 @@ export func Main(tests []Test) {
|
||||
}
|
||||
t := new(T);
|
||||
t.ch = make(chan *T);
|
||||
go TRunner(t, &tests[i]);
|
||||
go tRunner(t, &tests[i]);
|
||||
<-t.ch;
|
||||
if t.failed {
|
||||
println("--- FAIL:", tests[i].name);
|
||||
|
Loading…
Reference in New Issue
Block a user