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|
package sprig
import (
"fmt"
"math"
"strconv"
"strings"
"github.com/spf13/cast"
"github.com/shopspring/decimal"
)
// toFloat64 converts 64-bit floats
func toFloat64(v interface{}) float64 {
return cast.ToFloat64(v)
}
func toInt(v interface{}) int {
return cast.ToInt(v)
}
// toInt64 converts integer types to 64-bit integers
func toInt64(v interface{}) int64 {
return cast.ToInt64(v)
}
func max(a interface{}, i ...interface{}) int64 {
aa := toInt64(a)
for _, b := range i {
bb := toInt64(b)
if bb > aa {
aa = bb
}
}
return aa
}
func maxf(a interface{}, i ...interface{}) float64 {
aa := toFloat64(a)
for _, b := range i {
bb := toFloat64(b)
aa = math.Max(aa, bb)
}
return aa
}
func min(a interface{}, i ...interface{}) int64 {
aa := toInt64(a)
for _, b := range i {
bb := toInt64(b)
if bb < aa {
aa = bb
}
}
return aa
}
func minf(a interface{}, i ...interface{}) float64 {
aa := toFloat64(a)
for _, b := range i {
bb := toFloat64(b)
aa = math.Min(aa, bb)
}
return aa
}
func until(count int) []int {
step := 1
if count < 0 {
step = -1
}
return untilStep(0, count, step)
}
func untilStep(start, stop, step int) []int {
v := []int{}
if stop < start {
if step >= 0 {
return v
}
for i := start; i > stop; i += step {
v = append(v, i)
}
return v
}
if step <= 0 {
return v
}
for i := start; i < stop; i += step {
v = append(v, i)
}
return v
}
func floor(a interface{}) float64 {
aa := toFloat64(a)
return math.Floor(aa)
}
func ceil(a interface{}) float64 {
aa := toFloat64(a)
return math.Ceil(aa)
}
func round(a interface{}, p int, rOpt ...float64) float64 {
roundOn := .5
if len(rOpt) > 0 {
roundOn = rOpt[0]
}
val := toFloat64(a)
places := toFloat64(p)
var round float64
pow := math.Pow(10, places)
digit := pow * val
_, div := math.Modf(digit)
if div >= roundOn {
round = math.Ceil(digit)
} else {
round = math.Floor(digit)
}
return round / pow
}
// converts unix octal to decimal
func toDecimal(v interface{}) int64 {
result, err := strconv.ParseInt(fmt.Sprint(v), 8, 64)
if err != nil {
return 0
}
return result
}
func seq(params ...int) string {
increment := 1
switch len(params) {
case 0:
return ""
case 1:
start := 1
end := params[0]
if end < start {
increment = -1
}
return intArrayToString(untilStep(start, end+increment, increment), " ")
case 3:
start := params[0]
end := params[2]
step := params[1]
if end < start {
increment = -1
if step > 0 {
return ""
}
}
return intArrayToString(untilStep(start, end+increment, step), " ")
case 2:
start := params[0]
end := params[1]
step := 1
if end < start {
step = -1
}
return intArrayToString(untilStep(start, end+step, step), " ")
default:
return ""
}
}
func intArrayToString(slice []int, delimeter string) string {
return strings.Trim(strings.Join(strings.Fields(fmt.Sprint(slice)), delimeter), "[]")
}
// performs a float and subsequent decimal.Decimal conversion on inputs,
// and iterates through a and b executing the mathmetical operation f
func execDecimalOp(a interface{}, b []interface{}, f func(d1, d2 decimal.Decimal) decimal.Decimal) float64 {
prt := decimal.NewFromFloat(toFloat64(a))
for _, x := range b {
dx := decimal.NewFromFloat(toFloat64(x))
prt = f(prt, dx)
}
rslt, _ := prt.Float64()
return rslt
}
|
