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// 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 strconv_test
import (
"runtime"
. "strconv"
"testing"
)
type itob64Test struct {
in int64
base int
out string
}
var itob64tests = []itob64Test{
{0, 10, "0"},
{1, 10, "1"},
{-1, 10, "-1"},
{12345678, 10, "12345678"},
{-987654321, 10, "-987654321"},
{1<<31 - 1, 10, "2147483647"},
{-1<<31 + 1, 10, "-2147483647"},
{1 << 31, 10, "2147483648"},
{-1 << 31, 10, "-2147483648"},
{1<<31 + 1, 10, "2147483649"},
{-1<<31 - 1, 10, "-2147483649"},
{1<<32 - 1, 10, "4294967295"},
{-1<<32 + 1, 10, "-4294967295"},
{1 << 32, 10, "4294967296"},
{-1 << 32, 10, "-4294967296"},
{1<<32 + 1, 10, "4294967297"},
{-1<<32 - 1, 10, "-4294967297"},
{1 << 50, 10, "1125899906842624"},
{1<<63 - 1, 10, "9223372036854775807"},
{-1<<63 + 1, 10, "-9223372036854775807"},
{-1 << 63, 10, "-9223372036854775808"},
{0, 2, "0"},
{10, 2, "1010"},
{-1, 2, "-1"},
{1 << 15, 2, "1000000000000000"},
{-8, 8, "-10"},
{057635436545, 8, "57635436545"},
{1 << 24, 8, "100000000"},
{16, 16, "10"},
{-0x123456789abcdef, 16, "-123456789abcdef"},
{1<<63 - 1, 16, "7fffffffffffffff"},
{1<<63 - 1, 2, "111111111111111111111111111111111111111111111111111111111111111"},
{16, 17, "g"},
{25, 25, "10"},
{(((((17*35+24)*35+21)*35+34)*35+12)*35+24)*35 + 32, 35, "holycow"},
{(((((17*36+24)*36+21)*36+34)*36+12)*36+24)*36 + 32, 36, "holycow"},
}
func TestItoa(t *testing.T) {
for _, test := range itob64tests {
s := FormatInt(test.in, test.base)
if s != test.out {
t.Errorf("FormatInt(%v, %v) = %v want %v",
test.in, test.base, s, test.out)
}
x := AppendInt([]byte("abc"), test.in, test.base)
if string(x) != "abc"+test.out {
t.Errorf("AppendInt(%q, %v, %v) = %q want %v",
"abc", test.in, test.base, x, test.out)
}
if test.in >= 0 {
s := FormatUint(uint64(test.in), test.base)
if s != test.out {
t.Errorf("FormatUint(%v, %v) = %v want %v",
test.in, test.base, s, test.out)
}
x := AppendUint(nil, uint64(test.in), test.base)
if string(x) != test.out {
t.Errorf("AppendUint(%q, %v, %v) = %q want %v",
"abc", uint64(test.in), test.base, x, test.out)
}
}
if test.base == 10 && int64(int(test.in)) == test.in {
s := Itoa(int(test.in))
if s != test.out {
t.Errorf("Itoa(%v) = %v want %v",
test.in, s, test.out)
}
}
}
}
type uitob64Test struct {
in uint64
base int
out string
}
var uitob64tests = []uitob64Test{
{1<<63 - 1, 10, "9223372036854775807"},
{1 << 63, 10, "9223372036854775808"},
{1<<63 + 1, 10, "9223372036854775809"},
{1<<64 - 2, 10, "18446744073709551614"},
{1<<64 - 1, 10, "18446744073709551615"},
{1<<64 - 1, 2, "1111111111111111111111111111111111111111111111111111111111111111"},
}
func TestUitoa(t *testing.T) {
for _, test := range uitob64tests {
s := FormatUint(test.in, test.base)
if s != test.out {
t.Errorf("FormatUint(%v, %v) = %v want %v",
test.in, test.base, s, test.out)
}
x := AppendUint([]byte("abc"), test.in, test.base)
if string(x) != "abc"+test.out {
t.Errorf("AppendUint(%q, %v, %v) = %q want %v",
"abc", test.in, test.base, x, test.out)
}
}
}
func numAllocations(f func()) int {
runtime.UpdateMemStats()
n0 := runtime.MemStats.Mallocs
f()
runtime.UpdateMemStats()
return int(runtime.MemStats.Mallocs - n0)
}
/* This test relies on escape analysis which gccgo does not yet do.
var globalBuf [64]byte
func TestAppendUintDoesntAllocate(t *testing.T) {
n := numAllocations(func() {
var buf [64]byte
AppendInt(buf[:0], 123, 10)
})
want := 1 // TODO(bradfitz): this might be 0, once escape analysis is better
if n != want {
t.Errorf("with local buffer, did %d allocations, want %d", n, want)
}
n = numAllocations(func() {
AppendInt(globalBuf[:0], 123, 10)
})
if n != 0 {
t.Errorf("with reused buffer, did %d allocations, want 0", n)
}
}
*/
func BenchmarkFormatInt(b *testing.B) {
for i := 0; i < b.N; i++ {
for _, test := range itob64tests {
FormatInt(test.in, test.base)
}
}
}
func BenchmarkAppendInt(b *testing.B) {
dst := make([]byte, 0, 30)
for i := 0; i < b.N; i++ {
for _, test := range itob64tests {
AppendInt(dst, test.in, test.base)
}
}
}
func BenchmarkFormatUint(b *testing.B) {
for i := 0; i < b.N; i++ {
for _, test := range uitob64tests {
FormatUint(test.in, test.base)
}
}
}
func BenchmarkAppendUint(b *testing.B) {
dst := make([]byte, 0, 30)
for i := 0; i < b.N; i++ {
for _, test := range uitob64tests {
AppendUint(dst, test.in, test.base)
}
}
}
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