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/*
* Copyright 2021 ByteDance Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package {{PACKAGE}}
import (
`strconv`
`testing`
`fmt`
`github.com/stretchr/testify/assert`
)
func TestFastInt_IntToString(t *testing.T) {
var buf [32]byte
assert.Equal(t, "0" , string(buf[:__i64toa(&buf[0], 0)]))
assert.Equal(t, "1" , string(buf[:__i64toa(&buf[0], 1)]))
assert.Equal(t, "12" , string(buf[:__i64toa(&buf[0], 12)]))
assert.Equal(t, "123" , string(buf[:__i64toa(&buf[0], 123)]))
assert.Equal(t, "1234" , string(buf[:__i64toa(&buf[0], 1234)]))
assert.Equal(t, "12345" , string(buf[:__i64toa(&buf[0], 12345)]))
assert.Equal(t, "123456" , string(buf[:__i64toa(&buf[0], 123456)]))
assert.Equal(t, "1234567" , string(buf[:__i64toa(&buf[0], 1234567)]))
assert.Equal(t, "12345678" , string(buf[:__i64toa(&buf[0], 12345678)]))
assert.Equal(t, "123456789" , string(buf[:__i64toa(&buf[0], 123456789)]))
assert.Equal(t, "1234567890" , string(buf[:__i64toa(&buf[0], 1234567890)]))
assert.Equal(t, "12345678901" , string(buf[:__i64toa(&buf[0], 12345678901)]))
assert.Equal(t, "123456789012" , string(buf[:__i64toa(&buf[0], 123456789012)]))
assert.Equal(t, "1234567890123" , string(buf[:__i64toa(&buf[0], 1234567890123)]))
assert.Equal(t, "12345678901234" , string(buf[:__i64toa(&buf[0], 12345678901234)]))
assert.Equal(t, "123456789012345" , string(buf[:__i64toa(&buf[0], 123456789012345)]))
assert.Equal(t, "1234567890123456" , string(buf[:__i64toa(&buf[0], 1234567890123456)]))
assert.Equal(t, "12345678901234567" , string(buf[:__i64toa(&buf[0], 12345678901234567)]))
assert.Equal(t, "123456789012345678" , string(buf[:__i64toa(&buf[0], 123456789012345678)]))
assert.Equal(t, "1234567890123456789" , string(buf[:__i64toa(&buf[0], 1234567890123456789)]))
assert.Equal(t, "9223372036854775807" , string(buf[:__i64toa(&buf[0], 9223372036854775807)]))
assert.Equal(t, "-1" , string(buf[:__i64toa(&buf[0], -1)]))
assert.Equal(t, "-12" , string(buf[:__i64toa(&buf[0], -12)]))
assert.Equal(t, "-123" , string(buf[:__i64toa(&buf[0], -123)]))
assert.Equal(t, "-1234" , string(buf[:__i64toa(&buf[0], -1234)]))
assert.Equal(t, "-12345" , string(buf[:__i64toa(&buf[0], -12345)]))
assert.Equal(t, "-123456" , string(buf[:__i64toa(&buf[0], -123456)]))
assert.Equal(t, "-1234567" , string(buf[:__i64toa(&buf[0], -1234567)]))
assert.Equal(t, "-12345678" , string(buf[:__i64toa(&buf[0], -12345678)]))
assert.Equal(t, "-123456789" , string(buf[:__i64toa(&buf[0], -123456789)]))
assert.Equal(t, "-1234567890" , string(buf[:__i64toa(&buf[0], -1234567890)]))
assert.Equal(t, "-12345678901" , string(buf[:__i64toa(&buf[0], -12345678901)]))
assert.Equal(t, "-123456789012" , string(buf[:__i64toa(&buf[0], -123456789012)]))
assert.Equal(t, "-1234567890123" , string(buf[:__i64toa(&buf[0], -1234567890123)]))
assert.Equal(t, "-12345678901234" , string(buf[:__i64toa(&buf[0], -12345678901234)]))
assert.Equal(t, "-123456789012345" , string(buf[:__i64toa(&buf[0], -123456789012345)]))
assert.Equal(t, "-1234567890123456" , string(buf[:__i64toa(&buf[0], -1234567890123456)]))
assert.Equal(t, "-12345678901234567" , string(buf[:__i64toa(&buf[0], -12345678901234567)]))
assert.Equal(t, "-123456789012345678" , string(buf[:__i64toa(&buf[0], -123456789012345678)]))
assert.Equal(t, "-1234567890123456789" , string(buf[:__i64toa(&buf[0], -1234567890123456789)]))
assert.Equal(t, "-9223372036854775808" , string(buf[:__i64toa(&buf[0], -9223372036854775808)]))
}
func TestFastInt_UintToString(t *testing.T) {
var buf [32]byte
assert.Equal(t, "0" , string(buf[:__u64toa(&buf[0], 0)]))
assert.Equal(t, "1" , string(buf[:__u64toa(&buf[0], 1)]))
assert.Equal(t, "12" , string(buf[:__u64toa(&buf[0], 12)]))
assert.Equal(t, "123" , string(buf[:__u64toa(&buf[0], 123)]))
assert.Equal(t, "1234" , string(buf[:__u64toa(&buf[0], 1234)]))
assert.Equal(t, "12345" , string(buf[:__u64toa(&buf[0], 12345)]))
assert.Equal(t, "123456" , string(buf[:__u64toa(&buf[0], 123456)]))
assert.Equal(t, "1234567" , string(buf[:__u64toa(&buf[0], 1234567)]))
assert.Equal(t, "12345678" , string(buf[:__u64toa(&buf[0], 12345678)]))
assert.Equal(t, "123456789" , string(buf[:__u64toa(&buf[0], 123456789)]))
assert.Equal(t, "1234567890" , string(buf[:__u64toa(&buf[0], 1234567890)]))
assert.Equal(t, "12345678901" , string(buf[:__u64toa(&buf[0], 12345678901)]))
assert.Equal(t, "123456789012" , string(buf[:__u64toa(&buf[0], 123456789012)]))
assert.Equal(t, "1234567890123" , string(buf[:__u64toa(&buf[0], 1234567890123)]))
assert.Equal(t, "12345678901234" , string(buf[:__u64toa(&buf[0], 12345678901234)]))
assert.Equal(t, "123456789012345" , string(buf[:__u64toa(&buf[0], 123456789012345)]))
assert.Equal(t, "1234567890123456" , string(buf[:__u64toa(&buf[0], 1234567890123456)]))
assert.Equal(t, "12345678901234567" , string(buf[:__u64toa(&buf[0], 12345678901234567)]))
assert.Equal(t, "123456789012345678" , string(buf[:__u64toa(&buf[0], 123456789012345678)]))
assert.Equal(t, "1234567890123456789" , string(buf[:__u64toa(&buf[0], 1234567890123456789)]))
assert.Equal(t, "12345678901234567890" , string(buf[:__u64toa(&buf[0], 12345678901234567890)]))
assert.Equal(t, "18446744073709551615" , string(buf[:__u64toa(&buf[0], 18446744073709551615)]))
}
func BenchmarkFastInt_IntToString(b *testing.B) {
benchmarks := []struct {
name string
test func(*testing.B)
}{{
name: "StdLib-Positive",
test: func(b *testing.B) { var buf [32]byte; for i := 0; i < b.N; i++ { strconv.AppendInt(buf[:0], int64(i), 10) }},
}, {
name: "StdLib-Negative",
test: func(b *testing.B) { var buf [32]byte; for i := 0; i < b.N; i++ { strconv.AppendInt(buf[:0], -int64(i), 10) }},
}, {
name: "FastInt-Positive",
test: func(b *testing.B) { var buf [32]byte; for i := 0; i < b.N; i++ { __i64toa(&buf[0], int64(i)) }},
}, {
name: "FastInt-Negative",
test: func(b *testing.B) { var buf [32]byte; for i := 0; i < b.N; i++ { __i64toa(&buf[0], -int64(i)) }},
}}
for _, bm := range benchmarks {
b.Run(bm.name, bm.test)
}
}
type utoaBench struct {
name string
num uint64
}
func BenchmarkFastInt_UintToString(b *testing.B) {
maxUint := "18446744073709551615"
benchs := make([]utoaBench, len(maxUint) + 1)
benchs[0].name = "Zero"
benchs[0].num = 0
for i := 1; i <= len(maxUint); i++ {
benchs[i].name = strconv.FormatInt(int64(i), 10) + "-Digs"
benchs[i].num, _ = strconv.ParseUint(string(maxUint[:i]), 10, 64)
}
for _, t := range(benchs) {
benchmarks := []struct {
name string
test func(*testing.B)
}{{
name: "StdLib",
test: func(b *testing.B) { var buf [32]byte; for i := 0; i < b.N; i++ { strconv.AppendUint(buf[:0], t.num, 10) }},
}, {
name: "FastInt",
test: func(b *testing.B) { var buf [32]byte; for i := 0; i < b.N; i++ { __u64toa(&buf[0], t.num) }},
}}
for _, bm := range benchmarks {
name := fmt.Sprintf("%s_%s", bm.name, t.name)
b.Run(name, bm.test)
}
}
}
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