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big_test.go
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package xmath_test
import (
"fmt"
"math"
"math/big"
"github.com/goinsane/xmath"
)
func ExampleFloorBigFloat() {
fmt.Printf("floor of %v: %v\n", 2.4, xmath.FloorBigFloat(big.NewFloat(2.4)))
fmt.Printf("floor of %v: %v\n", 2.5, xmath.FloorBigFloat(big.NewFloat(2.5)))
fmt.Printf("floor of %v: %v\n", -6.5, xmath.FloorBigFloat(big.NewFloat(-6.5)))
fmt.Printf("floor of %v: %v\n", -6.6, xmath.FloorBigFloat(big.NewFloat(-6.6)))
fmt.Printf("floor of %v: %v\n", 5, xmath.FloorBigFloat(big.NewFloat(5)))
fmt.Printf("floor of %v: %v\n", -9, xmath.FloorBigFloat(big.NewFloat(-9)))
// Output:
// floor of 2.4: 2
// floor of 2.5: 2
// floor of -6.5: -7
// floor of -6.6: -7
// floor of 5: 5
// floor of -9: -9
}
func ExampleCeilBigFloat() {
fmt.Printf("ceil of %v: %v\n", 2.4, xmath.CeilBigFloat(big.NewFloat(2.4)))
fmt.Printf("ceil of %v: %v\n", 2.5, xmath.CeilBigFloat(big.NewFloat(2.5)))
fmt.Printf("ceil of %v: %v\n", -6.5, xmath.CeilBigFloat(big.NewFloat(-6.5)))
fmt.Printf("ceil of %v: %v\n", -6.6, xmath.CeilBigFloat(big.NewFloat(-6.6)))
fmt.Printf("ceil of %v: %v\n", 5, xmath.CeilBigFloat(big.NewFloat(5)))
fmt.Printf("ceil of %v: %v\n", -9, xmath.CeilBigFloat(big.NewFloat(-9)))
// Output:
// ceil of 2.4: 3
// ceil of 2.5: 3
// ceil of -6.5: -6
// ceil of -6.6: -6
// ceil of 5: 5
// ceil of -9: -9
}
func ExampleRoundBigFloat() {
fmt.Printf("round of %v: %v\n", 2.4, xmath.RoundBigFloat(big.NewFloat(2.4)))
fmt.Printf("round of %v: %v\n", 2.5, xmath.RoundBigFloat(big.NewFloat(2.5)))
fmt.Printf("round of %v: %v\n", -6.5, xmath.RoundBigFloat(big.NewFloat(-6.5)))
fmt.Printf("round of %v: %v\n", -6.6, xmath.RoundBigFloat(big.NewFloat(-6.6)))
fmt.Printf("round of %v: %v\n", 5, xmath.RoundBigFloat(big.NewFloat(5)))
fmt.Printf("round of %v: %v\n", -9, xmath.RoundBigFloat(big.NewFloat(-9)))
// Output:
// round of 2.4: 2
// round of 2.5: 3
// round of -6.5: -6
// round of -6.6: -7
// round of 5: 5
// round of -9: -9
}
func ExampleInt64BigInt() {
var x *big.Int
var k int64
var acc big.Accuracy
x = big.NewInt(49)
k, acc = xmath.Int64BigInt(x)
fmt.Printf("int64 of %v: %v acc=%v\n", x, k, acc)
x = big.NewInt(-27)
k, acc = xmath.Int64BigInt(x)
fmt.Printf("int64 of %v: %v acc=%v\n", x, k, acc)
x = big.NewInt(math.MaxInt64)
k, acc = xmath.Int64BigInt(x)
fmt.Printf("int64 of MaxInt64=%v: %v acc=%v\n", x, k, acc)
x = new(big.Int).Add(big.NewInt(math.MaxInt64), big.NewInt(5))
k, acc = xmath.Int64BigInt(x)
fmt.Printf("int64 of MaxInt64+5=%v: %v acc=%v\n", x, k, acc)
x = big.NewInt(math.MinInt64)
k, acc = xmath.Int64BigInt(x)
fmt.Printf("int64 of MinInt64=%v: %v acc=%v\n", x, k, acc)
x = new(big.Int).Sub(big.NewInt(math.MinInt64), big.NewInt(7))
k, acc = xmath.Int64BigInt(x)
fmt.Printf("int64 of MinInt64-7=%v: %v acc=%v\n", x, k, acc)
// Output:
// int64 of 49: 49 acc=Exact
// int64 of -27: -27 acc=Exact
// int64 of MaxInt64=9223372036854775807: 9223372036854775807 acc=Exact
// int64 of MaxInt64+5=9223372036854775812: 9223372036854775807 acc=Below
// int64 of MinInt64=-9223372036854775808: -9223372036854775808 acc=Exact
// int64 of MinInt64-7=-9223372036854775815: -9223372036854775808 acc=Above
}
func ExampleUint64BigInt() {
var x *big.Int
var k uint64
var acc big.Accuracy
x = big.NewInt(49)
k, acc = xmath.Uint64BigInt(x)
fmt.Printf("uint64 of %v: %v acc=%v\n", x, k, acc)
x = big.NewInt(-27)
k, acc = xmath.Uint64BigInt(x)
fmt.Printf("uint64 of %v: %v acc=%v\n", x, k, acc)
x = big.NewInt(math.MaxInt64)
k, acc = xmath.Uint64BigInt(x)
fmt.Printf("uint64 of MaxInt64=%v: %v acc=%v\n", x, k, acc)
x = new(big.Int).Add(big.NewInt(math.MaxInt64), big.NewInt(5))
k, acc = xmath.Uint64BigInt(x)
fmt.Printf("uint64 of MaxInt64+5=%v: %v acc=%v\n", x, k, acc)
x = big.NewInt(math.MinInt64)
k, acc = xmath.Uint64BigInt(x)
fmt.Printf("uint64 of MinInt64=%v: %v acc=%v\n", x, k, acc)
x = new(big.Int).Sub(big.NewInt(math.MinInt64), big.NewInt(7))
k, acc = xmath.Uint64BigInt(x)
fmt.Printf("uint64 of MinInt64-7=%v: %v acc=%v\n", x, k, acc)
x = new(big.Int).SetUint64(math.MaxUint64)
k, acc = xmath.Uint64BigInt(x)
fmt.Printf("uint64 of MaxUint64=%v: %v acc=%v\n", x, k, acc)
x = new(big.Int).Add(new(big.Int).SetUint64(math.MaxUint64), big.NewInt(3))
k, acc = xmath.Uint64BigInt(x)
fmt.Printf("uint64 of MaxUint64+3=%v: %v acc=%v\n", x, k, acc)
// Output:
// uint64 of 49: 49 acc=Exact
// uint64 of -27: 0 acc=Above
// uint64 of MaxInt64=9223372036854775807: 9223372036854775807 acc=Exact
// uint64 of MaxInt64+5=9223372036854775812: 9223372036854775812 acc=Exact
// uint64 of MinInt64=-9223372036854775808: 0 acc=Above
// uint64 of MinInt64-7=-9223372036854775815: 0 acc=Above
// uint64 of MaxUint64=18446744073709551615: 18446744073709551615 acc=Exact
// uint64 of MaxUint64+3=18446744073709551618: 18446744073709551615 acc=Below
}
func ExampleIntBigRat() {
var n *big.Int
var acc big.Accuracy
n, acc = xmath.IntBigRat(big.NewRat(24, 10))
fmt.Printf("integer of %v/%v: %v acc=%v\n", 24, 10, n, acc)
n, acc = xmath.IntBigRat(big.NewRat(25, 10))
fmt.Printf("integer of %v/%v: %v acc=%v\n", 25, 10, n, acc)
n, acc = xmath.IntBigRat(big.NewRat(-65, 10))
fmt.Printf("integer of %v/%v: %v acc=%v\n", -65, 10, n, acc)
n, acc = xmath.IntBigRat(big.NewRat(-66, 10))
fmt.Printf("integer of %v/%v: %v acc=%v\n", -66, 10, n, acc)
n, acc = xmath.IntBigRat(big.NewRat(50, 10))
fmt.Printf("integer of %v/%v: %v acc=%v\n", 50, 10, n, acc)
n, acc = xmath.IntBigRat(big.NewRat(-90, 10))
fmt.Printf("integer of %v/%v: %v acc=%v\n", -90, 10, n, acc)
// Output:
// integer of 24/10: 2 acc=Below
// integer of 25/10: 2 acc=Below
// integer of -65/10: -6 acc=Above
// integer of -66/10: -6 acc=Above
// integer of 50/10: 5 acc=Exact
// integer of -90/10: -9 acc=Exact
}
func ExampleInt64BigRat() {
var k int64
var acc big.Accuracy
k, acc = xmath.Int64BigRat(new(big.Rat).SetFrac(big.NewInt(50), big.NewInt(10)))
fmt.Printf("int64 of 50/10: %v acc=%v\n", k, acc)
k, acc = xmath.Int64BigRat(new(big.Rat).SetFrac(big.NewInt(-90), big.NewInt(10)))
fmt.Printf("int64 of -90/10: %v acc=%v\n", k, acc)
k, acc = xmath.Int64BigRat(new(big.Rat).SetFrac(big.NewInt(math.MaxInt64), big.NewInt(5)))
fmt.Printf("int64 of MaxInt64/5: %v acc=%v\n", k, acc)
k, acc = xmath.Int64BigRat(new(big.Rat).SetFrac(big.NewInt(math.MinInt64), big.NewInt(5)))
fmt.Printf("int64 of MinInt64/5: %v acc=%v\n", k, acc)
k, acc = xmath.Int64BigRat(new(big.Rat).SetFrac(new(big.Int).Mul(big.NewInt(7), big.NewInt(math.MaxInt64)), big.NewInt(5)))
fmt.Printf("int64 of 7*MaxInt64/5: %v acc=%v\n", k, acc)
k, acc = xmath.Int64BigRat(new(big.Rat).SetFrac(new(big.Int).Mul(big.NewInt(7), big.NewInt(math.MinInt64)), big.NewInt(5)))
fmt.Printf("int64 of 7*MinInt64/5: %v acc=%v\n", k, acc)
// Output:
// int64 of 50/10: 5 acc=Exact
// int64 of -90/10: -9 acc=Exact
// int64 of MaxInt64/5: 1844674407370955161 acc=Below
// int64 of MinInt64/5: -1844674407370955161 acc=Above
// int64 of 7*MaxInt64/5: 9223372036854775807 acc=Below
// int64 of 7*MinInt64/5: -9223372036854775808 acc=Above
}
func ExampleUint64BigRat() {
var k uint64
var acc big.Accuracy
k, acc = xmath.Uint64BigRat(new(big.Rat).SetFrac(big.NewInt(50), big.NewInt(10)))
fmt.Printf("uint64 of 50/10: %v acc=%v\n", k, acc)
k, acc = xmath.Uint64BigRat(new(big.Rat).SetFrac(big.NewInt(0), big.NewInt(5)))
fmt.Printf("uint64 of 0/5: %v acc=%v\n", k, acc)
k, acc = xmath.Uint64BigRat(new(big.Rat).SetFrac(big.NewInt(math.MaxInt64), big.NewInt(7)))
fmt.Printf("uint64 of MaxInt64/7: %v acc=%v\n", k, acc)
k, acc = xmath.Uint64BigRat(new(big.Rat).SetFrac(new(big.Int).Mul(big.NewInt(13), big.NewInt(math.MaxInt64)), big.NewInt(5)))
fmt.Printf("uint64 of 13*MaxInt64/5: %v acc=%v\n", k, acc)
// Output:
// uint64 of 50/10: 5 acc=Exact
// uint64 of 0/5: 0 acc=Exact
// uint64 of MaxInt64/7: 1317624576693539401 acc=Exact
// uint64 of 13*MaxInt64/5: 18446744073709551615 acc=Below
}
func ExampleFloorBigRat() {
fmt.Printf("floor of %v/%v: %v\n", 24, 10, xmath.FloorBigRat(big.NewRat(24, 10)))
fmt.Printf("floor of %v/%v: %v\n", 25, 10, xmath.FloorBigRat(big.NewRat(25, 10)))
fmt.Printf("floor of %v/%v: %v\n", -65, 10, xmath.FloorBigRat(big.NewRat(-65, 10)))
fmt.Printf("floor of %v/%v: %v\n", -66, 10, xmath.FloorBigRat(big.NewRat(-66, 10)))
fmt.Printf("floor of %v/%v: %v\n", 50, 10, xmath.FloorBigRat(big.NewRat(50, 10)))
fmt.Printf("floor of %v/%v: %v\n", -90, 10, xmath.FloorBigRat(big.NewRat(-90, 10)))
// Output:
// floor of 24/10: 2
// floor of 25/10: 2
// floor of -65/10: -7
// floor of -66/10: -7
// floor of 50/10: 5
// floor of -90/10: -9
}
func ExampleCeilBigRat() {
fmt.Printf("ceil of %v/%v: %v\n", 24, 10, xmath.CeilBigRat(big.NewRat(24, 10)))
fmt.Printf("ceil of %v/%v: %v\n", 25, 10, xmath.CeilBigRat(big.NewRat(25, 10)))
fmt.Printf("ceil of %v/%v: %v\n", -65, 10, xmath.CeilBigRat(big.NewRat(-65, 10)))
fmt.Printf("ceil of %v/%v: %v\n", -66, 10, xmath.CeilBigRat(big.NewRat(-66, 10)))
fmt.Printf("ceil of %v/%v: %v\n", 50, 10, xmath.CeilBigRat(big.NewRat(50, 10)))
fmt.Printf("ceil of %v/%v: %v\n", -90, 10, xmath.CeilBigRat(big.NewRat(-90, 10)))
// Output:
// ceil of 24/10: 3
// ceil of 25/10: 3
// ceil of -65/10: -6
// ceil of -66/10: -6
// ceil of 50/10: 5
// ceil of -90/10: -9
}
func ExampleRoundBigRat() {
fmt.Printf("round of %v/%v: %v\n", 24, 10, xmath.RoundBigRat(big.NewRat(24, 10)))
fmt.Printf("round of %v/%v: %v\n", 25, 10, xmath.RoundBigRat(big.NewRat(25, 10)))
fmt.Printf("round of %v/%v: %v\n", -65, 10, xmath.RoundBigRat(big.NewRat(-65, 10)))
fmt.Printf("round of %v/%v: %v\n", -66, 10, xmath.RoundBigRat(big.NewRat(-66, 10)))
fmt.Printf("round of %v/%v: %v\n", 50, 10, xmath.RoundBigRat(big.NewRat(50, 10)))
fmt.Printf("round of %v/%v: %v\n", -90, 10, xmath.RoundBigRat(big.NewRat(-90, 10)))
// Output:
// round of 24/10: 2
// round of 25/10: 3
// round of -65/10: -6
// round of -66/10: -7
// round of 50/10: 5
// round of -90/10: -9
}