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types: use mathutil.Max/mathutil.Min instead of myMax/myMin
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@Defined2014
Defined2014 committed Feb 8, 2023
1 parent f1d450f commit 3883a50
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Showing 2 changed files with 17 additions and 44 deletions.
28 changes: 0 additions & 28 deletions types/helper.go
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Original file line number Diff line number Diff line change
Expand Up @@ -114,34 +114,6 @@ func isPunctuation(c byte) bool {
return (c >= 0x21 && c <= 0x2F) || (c >= 0x3A && c <= 0x40) || (c >= 0x5B && c <= 0x60) || (c >= 0x7B && c <= 0x7E)
}

func myMax(a, b int) int {
if a > b {
return a
}
return b
}

func myMaxInt8(a, b int8) int8 {
if a > b {
return a
}
return b
}

func myMin(a, b int) int {
if a < b {
return a
}
return b
}

func myMinInt8(a, b int8) int8 {
if a < b {
return a
}
return b
}

const (
maxUint = uint64(math.MaxUint64)
uintCutOff = maxUint/uint64(10) + 1
Expand Down
33 changes: 17 additions & 16 deletions types/mydecimal.go
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Original file line number Diff line number Diff line change
Expand Up @@ -24,6 +24,7 @@ import (
"github.com/pingcap/log"
"github.com/pingcap/tidb/parser/mysql"
"github.com/pingcap/tidb/parser/terror"
"github.com/pingcap/tidb/util/mathutil"
"go.uber.org/zap"
)

Expand Down Expand Up @@ -353,7 +354,7 @@ func (d *MyDecimal) ToString() (str []byte) {
for ; digitsFrac > 0; digitsFrac -= digitsPerWord {
x := d.wordBuf[wordIdx]
wordIdx++
for i := myMin(digitsFrac, digitsPerWord); i > 0; i-- {
for i := mathutil.Min(digitsFrac, digitsPerWord); i > 0; i-- {
y := x / digMask
str[fracIdx] = byte(y) + '0'
fracIdx++
Expand All @@ -380,7 +381,7 @@ func (d *MyDecimal) ToString() (str []byte) {
for ; digitsInt > 0; digitsInt -= digitsPerWord {
wordIdx--
x := d.wordBuf[wordIdx]
for i := myMin(digitsInt, digitsPerWord); i > 0; i-- {
for i := mathutil.Min(digitsInt, digitsPerWord); i > 0; i-- {
y := x / 10
strIdx--
str[strIdx] = '0' + byte(x-y*10)
Expand Down Expand Up @@ -840,7 +841,7 @@ func (d *MyDecimal) Round(to *MyDecimal, frac int, roundMode RoundMode) (err err
if to != d {
copy(to.wordBuf[:], d.wordBuf[:])
to.negative = d.negative
to.digitsInt = int8(myMin(wordsInt, wordBufLen) * digitsPerWord)
to.digitsInt = int8(mathutil.Min(wordsInt, wordBufLen) * digitsPerWord)
}
if wordsFracTo > wordsFrac {
idx := wordsInt + wordsFrac
Expand Down Expand Up @@ -941,7 +942,7 @@ func (d *MyDecimal) Round(to *MyDecimal, frac int, roundMode RoundMode) (err err
frac = wordsFracTo * digitsPerWord
err = ErrTruncated
}
for toIdx = wordsInt + myMax(wordsFracTo, 0); toIdx > 0; toIdx-- {
for toIdx = wordsInt + mathutil.Max(wordsFracTo, 0); toIdx > 0; toIdx-- {
if toIdx < wordBufLen {
to.wordBuf[toIdx] = to.wordBuf[toIdx-1]
} else {
Expand All @@ -965,7 +966,7 @@ func (d *MyDecimal) Round(to *MyDecimal, frac int, roundMode RoundMode) (err err
/* making 'zero' with the proper scale */
idx := wordsFracTo + 1
to.digitsInt = 1
to.digitsFrac = int8(myMax(frac, 0))
to.digitsFrac = int8(mathutil.Max(frac, 0))
to.negative = false
for toIdx < idx {
to.wordBuf[toIdx] = 0
Expand Down Expand Up @@ -1602,7 +1603,7 @@ func DecimalNeg(from *MyDecimal) *MyDecimal {
// of `to` may be changed during evaluating.
func DecimalAdd(from1, from2, to *MyDecimal) error {
from1, from2, to = validateArgs(from1, from2, to)
to.resultFrac = myMaxInt8(from1.resultFrac, from2.resultFrac)
to.resultFrac = mathutil.Max(from1.resultFrac, from2.resultFrac)
if from1.negative == from2.negative {
return doAdd(from1, from2, to)
}
Expand All @@ -1613,7 +1614,7 @@ func DecimalAdd(from1, from2, to *MyDecimal) error {
// DecimalSub subs one decimal from another, sets the result to 'to'.
func DecimalSub(from1, from2, to *MyDecimal) error {
from1, from2, to = validateArgs(from1, from2, to)
to.resultFrac = myMaxInt8(from1.resultFrac, from2.resultFrac)
to.resultFrac = mathutil.Max(from1.resultFrac, from2.resultFrac)
if from1.negative == from2.negative {
_, err := doSub(from1, from2, to)
return err
Expand Down Expand Up @@ -1649,7 +1650,7 @@ func doSub(from1, from2, to *MyDecimal) (cmp int, err error) {
wordsFrac1 = digitsToWords(int(from1.digitsFrac))
wordsInt2 = digitsToWords(int(from2.digitsInt))
wordsFrac2 = digitsToWords(int(from2.digitsFrac))
wordsFracTo = myMax(wordsFrac1, wordsFrac2)
wordsFracTo = mathutil.Max(wordsFrac1, wordsFrac2)

start1 = 0
stop1 = wordsInt1
Expand Down Expand Up @@ -1814,8 +1815,8 @@ func doAdd(from1, from2, to *MyDecimal) error {
wordsFrac1 = digitsToWords(int(from1.digitsFrac))
wordsInt2 = digitsToWords(int(from2.digitsInt))
wordsFrac2 = digitsToWords(int(from2.digitsFrac))
wordsIntTo = myMax(wordsInt1, wordsInt2)
wordsFracTo = myMax(wordsFrac1, wordsFrac2)
wordsIntTo = mathutil.Max(wordsInt1, wordsInt2)
wordsFracTo = mathutil.Max(wordsFrac1, wordsFrac2)
)

var x int32
Expand All @@ -1839,7 +1840,7 @@ func doAdd(from1, from2, to *MyDecimal) error {
idxTo := wordsIntTo + wordsFracTo
to.negative = from1.negative
to.digitsInt = int8(wordsIntTo * digitsPerWord)
to.digitsFrac = myMaxInt8(from1.digitsFrac, from2.digitsFrac)
to.digitsFrac = mathutil.Max(from1.digitsFrac, from2.digitsFrac)

if err != nil {
if to.digitsFrac > int8(wordsFracTo*digitsPerWord) {
Expand Down Expand Up @@ -1977,7 +1978,7 @@ func DecimalMul(from1, from2, to *MyDecimal) error {
tmp1 = wordsIntTo
tmp2 = wordsFracTo
)
to.resultFrac = myMinInt8(from1.resultFrac+from2.resultFrac, mysql.MaxDecimalScale)
to.resultFrac = mathutil.Min(from1.resultFrac+from2.resultFrac, mysql.MaxDecimalScale)
wordsIntTo, wordsFracTo, err = fixWordCntError(wordsIntTo, wordsFracTo)
to.negative = from1.negative != from2.negative
to.digitsFrac = from1.digitsFrac + from2.digitsFrac
Expand Down Expand Up @@ -2092,7 +2093,7 @@ func DecimalMul(from1, from2, to *MyDecimal) error {
// fracIncr - increment of fraction
func DecimalDiv(from1, from2, to *MyDecimal, fracIncr int) error {
from1, from2, to = validateArgs(from1, from2, to)
to.resultFrac = myMinInt8(from1.resultFrac+int8(fracIncr), mysql.MaxDecimalScale)
to.resultFrac = mathutil.Min(from1.resultFrac+int8(fracIncr), mysql.MaxDecimalScale)
return doDivMod(from1, from2, to, nil, fracIncr)
}

Expand Down Expand Up @@ -2122,7 +2123,7 @@ DecimalMod does modulus of two decimals.
*/
func DecimalMod(from1, from2, to *MyDecimal) error {
from1, from2, to = validateArgs(from1, from2, to)
to.resultFrac = myMaxInt8(from1.resultFrac, from2.resultFrac)
to.resultFrac = mathutil.Max(from1.resultFrac, from2.resultFrac)
return doDivMod(from1, from2, nil, to, 0)
}

Expand Down Expand Up @@ -2190,7 +2191,7 @@ func doDivMod(from1, from2, to, mod *MyDecimal, fracIncr int) error {
// digitsFrac=max(frac1, frac2), as for subtraction
// digitsInt=from2.digitsInt
to.negative = from1.negative
to.digitsFrac = myMaxInt8(from1.digitsFrac, from2.digitsFrac)
to.digitsFrac = mathutil.Max(from1.digitsFrac, from2.digitsFrac)
} else {
wordsFracTo = digitsToWords(frac1 + frac2 + fracIncr)
wordsIntTo, wordsFracTo, err = fixWordCntError(wordsIntTo, wordsFracTo)
Expand Down Expand Up @@ -2355,7 +2356,7 @@ func doDivMod(from1, from2, to, mod *MyDecimal, fracIncr int) error {
return ErrOverflow
}
stop1 = start1 + wordsIntTo + wordsFracTo
to.digitsInt = int8(myMin(wordsIntTo*digitsPerWord, int(from2.digitsInt)))
to.digitsInt = int8(mathutil.Min(wordsIntTo*digitsPerWord, int(from2.digitsInt)))
}
if wordsIntTo+wordsFracTo > wordBufLen {
stop1 -= wordsIntTo + wordsFracTo - wordBufLen
Expand Down

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