lychiyu/bbgo_origin
1
0
Fork 0
mirror of https://github.com/c9s/bbgo.git synced 2024-11-21 22:43:52 +00:00
Code Issues Actions 2 Packages Projects Releases Wiki Activity

fixedpoint: add Floor() method on dnum

Browse Source
This commit is contained in:
c9s 2022-11-16 16:42:14 +08:00
parent 2aaa2e7775
commit 991dc4121c
No known key found for this signature in database
GPG Key ID: 7385E7E464CB0A54
1 changed files with 10 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
pkg/fixedpoint/dec.go
View File

@ -131,7 +131,7 @@ func NewFromInt(n int64) Value {
if n == 0 {
return Zero
}
//n0 := n
// n0 := n
sign := int8(signPos)
if n < 0 {
n = -n
@ -527,7 +527,7 @@ func NewFromString(s string) (Value, error) {
coef *= pow10[p]
exp -= p
}
//check(coefMin <= coef && coef <= coefMax)
// check(coefMin <= coef && coef <= coefMax)
return Value{coef, sign, exp}, nil
}
@ -577,7 +577,7 @@ func NewFromBytes(s []byte) (Value, error) {
coef *= pow10[p]
exp -= p
}
//check(coefMin <= coef && coef <= coefMax)
// check(coefMin <= coef && coef <= coefMax)
return Value{coef, sign, exp}, nil
}
@ -958,6 +958,10 @@ func (dn Value) integer(mode RoundingMode) Value {
return Value{i, dn.sign, dn.exp}
}
func (dn Value) Floor() Value {
return dn.Round(0, Down)
}
func (dn Value) Round(r int, mode RoundingMode) Value {
if dn.sign == 0 || dn.sign == signNegInf || dn.sign == signPosInf ||
r >= digitsMax {
@ -1171,9 +1175,9 @@ func align(x, y *Value) bool {
return false
}
yshift = e
//check(0 <= yshift && yshift <= 20)
// check(0 <= yshift && yshift <= 20)
y.coef = (y.coef + halfpow10[yshift]) / pow10[yshift]
//check(int(y.exp)+yshift == int(x.exp))
// check(int(y.exp)+yshift == int(x.exp))
return true
}
@ -1278,7 +1282,7 @@ func (dn Value) Format(mask string) string {
nd := len(digits)
di := e - before
//check(di <= 0)
// check(di <= 0)
var buf strings.Builder
sign := n.Sign()
signok := (sign >= 0)