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fuzz_test.go
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fuzz_test.go
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package num
import (
"bytes"
"fmt"
"math"
"math/big"
"math/rand"
"strings"
"testing"
)
type fuzzOp string
type fuzzType string
// fuzzDefaultIterations should be configured to guarantee all of the argument
// schemes execute at least once for each op in a reasonable time.
// This is the equivalent of passing -num.fuzziter=<...> to 'go test':
const fuzzDefaultIterations = 20000
// These ops are all enabled by default. You can instead pass them explicitly
// on the command line like so: '-num.fuzzop=add -num.fuzzop=sub', or you can
// use the short form '-num.fuzzop=add,sub,mul'.
//
// If you add a new op, search for the string 'NEWOP' in this file for all the
// places you need to update.
const (
fuzzAbs fuzzOp = "abs"
fuzzAdd fuzzOp = "add"
fuzzAdd64 fuzzOp = "add64"
fuzzAnd fuzzOp = "and"
fuzzAnd64 fuzzOp = "and64"
fuzzAndNot fuzzOp = "andnot"
fuzzAsFloat64 fuzzOp = "asfloat64"
fuzzBinBE fuzzOp = "binbe"
fuzzBinLE fuzzOp = "binle"
fuzzBit fuzzOp = "bit"
fuzzBitLen fuzzOp = "bitlen"
fuzzCmp fuzzOp = "cmp"
fuzzCmp64 fuzzOp = "cmp64"
fuzzDec fuzzOp = "dec"
fuzzEqual fuzzOp = "equal"
fuzzEqual64 fuzzOp = "equal64"
fuzzFromFloat64 fuzzOp = "fromfloat64"
fuzzGreaterOrEqualTo fuzzOp = "gte"
fuzzGreaterOrEqualTo64 fuzzOp = "gte64"
fuzzGreaterThan fuzzOp = "gt"
fuzzGreaterThan64 fuzzOp = "gt64"
fuzzInc fuzzOp = "inc"
fuzzLessOrEqualTo fuzzOp = "lte"
fuzzLessOrEqualTo64 fuzzOp = "lte64"
fuzzLessThan fuzzOp = "lt"
fuzzLessThan64 fuzzOp = "lt64"
fuzzLsh fuzzOp = "lsh"
fuzzMul fuzzOp = "mul"
fuzzMul64 fuzzOp = "mul64"
fuzzNeg fuzzOp = "neg"
fuzzNot fuzzOp = "not"
fuzzOr fuzzOp = "or"
fuzzOr64 fuzzOp = "or64"
fuzzQuo fuzzOp = "quo"
fuzzQuo64 fuzzOp = "quo64"
fuzzQuoRem fuzzOp = "quorem"
fuzzQuoRem64 fuzzOp = "quorem64"
fuzzRem fuzzOp = "rem"
fuzzRem64 fuzzOp = "rem64"
fuzzRotateLeft fuzzOp = "rotl"
fuzzRsh fuzzOp = "rsh"
fuzzString fuzzOp = "string"
fuzzSetBit fuzzOp = "setbit"
fuzzSub fuzzOp = "sub"
fuzzSub64 fuzzOp = "sub64"
fuzzXor fuzzOp = "xor"
fuzzXor64 fuzzOp = "xor64"
)
// These types are all enabled by default. You can instead pass them explicitly
// on the command line like so: '-num.fuzztype=u128 -num.fuzztype=i128'
const (
fuzzTypeU128 fuzzType = "u128"
fuzzTypeI128 fuzzType = "i128"
)
var (
u128FloatLimit = math.Nextafter(maxRepresentableU128Float, math.Inf(1))
)
var allFuzzTypes = []fuzzType{fuzzTypeU128, fuzzTypeI128}
// allFuzzOps are active by default.
//
// NEWOP: Update this list if a NEW op is added otherwise it won't be
// enabled by default.
//
// Please keep this list alphabetised.
var allFuzzOps = []fuzzOp{
fuzzAbs,
fuzzAdd,
fuzzAdd64,
fuzzAnd,
fuzzAnd64,
fuzzAndNot,
fuzzAsFloat64,
fuzzBinBE,
fuzzBinLE,
fuzzBit,
fuzzBitLen,
fuzzCmp,
fuzzCmp64,
fuzzDec,
fuzzEqual,
fuzzEqual64,
fuzzFromFloat64,
fuzzGreaterOrEqualTo,
fuzzGreaterOrEqualTo64,
fuzzGreaterThan,
fuzzGreaterThan64,
fuzzInc,
fuzzLessOrEqualTo,
fuzzLessOrEqualTo64,
fuzzLessThan,
fuzzLessThan64,
fuzzLsh,
fuzzMul,
fuzzMul64,
fuzzNeg,
fuzzNot,
fuzzOr,
fuzzOr64,
fuzzQuo,
fuzzQuo64,
fuzzQuoRem,
fuzzQuoRem64,
fuzzRem,
fuzzRem64,
fuzzRotateLeft,
fuzzRsh,
fuzzSetBit,
fuzzString,
fuzzSub,
fuzzSub64,
fuzzXor,
fuzzXor64,
}
// NEWOP: update this interface if a new op is added.
type fuzzOps interface {
Name() string // Not an op
Abs() error
Add() error
Add64() error
And() error
And64() error
AndNot() error
AsFloat64() error
BinBE() error
BinLE() error
Bit() error
BitLen() error
Cmp() error
Cmp64() error
Dec() error
Equal() error
Equal64() error
FromFloat64() error
GreaterOrEqualTo() error
GreaterOrEqualTo64() error
GreaterThan() error
GreaterThan64() error
Inc() error
LessOrEqualTo() error
LessOrEqualTo64() error
LessThan() error
LessThan64() error
Lsh() error
Mul() error
Mul64() error
Neg() error
Not() error
Or() error
Or64() error
Quo() error
Quo64() error
QuoRem() error
QuoRem64() error
Rem() error
Rem64() error
RotateLeft() error
Rsh() error
SetBit() error
String() error
Sub() error
Sub64() error
Xor() error
Xor64() error
}
func checkEqualInt(u int, b int) error {
if u != b {
return fmt.Errorf("128(%v) != big(%v)", u, b)
}
return nil
}
func checkEqualBool(u bool, b bool) error {
if u != b {
return fmt.Errorf("128(%v) != big(%v)", u, b)
}
return nil
}
func checkEqualU128(n string, u U128, b *big.Int) error {
if u.AsBigInt().Cmp(b) != 0 {
return fmt.Errorf("%s: u128(%s) != big(%s)", n, u.String(), b.String())
}
return nil
}
func checkEqualBytes(n string, b1 []byte, b2 []byte) error {
if !bytes.Equal(b1, b2) {
return fmt.Errorf("%s: bytes(%v) != bytes(%v)", n, b1, b2)
}
return nil
}
func checkEqualI128(n string, i I128, b *big.Int) error {
if i.AsBigInt().Cmp(b) != 0 {
return fmt.Errorf("%s: i128(%s) != big(%s)", n, i.String(), b.String())
}
return nil
}
func checkEqualString(u fmt.Stringer, b fmt.Stringer) error {
if u.String() != b.String() {
return fmt.Errorf("128(%s) != big(%s)", u.String(), b.String())
}
return nil
}
func checkFloat(orig *big.Int, result float64, bf *big.Float) error {
diff := new(big.Float).SetFloat64(result)
diff.Sub(diff, bf)
diff.Abs(diff)
isZero := orig.Cmp(big0) == 0
if !isZero {
diff.Quo(diff, bf)
}
if (isZero && result != 0) || diff.Abs(diff).Cmp(floatDiffLimit) > 0 {
return fmt.Errorf("|128(%f) - big(%f)| = %s, > %s", result, bf,
cleanFloatStr(fmt.Sprintf("%.20f", diff)),
cleanFloatStr(fmt.Sprintf("%.20f", floatDiffLimit)))
}
return nil
}
func TestFuzz(t *testing.T) {
// fuzzOpsActive comes from the -num.fuzzop flag, in TestMain:
var runFuzzOps = fuzzOpsActive
// fuzzTypesActive comes from the -num.fuzzop flag, in TestMain:
var runFuzzTypes = fuzzTypesActive
var source = newRando(globalRNG) // Classic rando!
var totalFailures int
var fuzzTypes []fuzzOps
for _, fuzzType := range runFuzzTypes {
switch fuzzType {
case fuzzTypeU128:
fuzzTypes = append(fuzzTypes, &fuzzU128{source: source})
case fuzzTypeI128:
fuzzTypes = append(fuzzTypes, &fuzzI128{source: source})
default:
panic("unknown fuzz type")
}
}
var failures = make([][]int, len(fuzzTypes))
var failCount = 0
for implIdx, fuzzImpl := range fuzzTypes {
failures[implIdx] = make([]int, len(runFuzzOps))
for opIdx, op := range runFuzzOps {
opIterations := source.NextOp(op, fuzzIterations)
for i := 0; i < opIterations; i++ {
source.NextTest()
var err error
// NEWOP: add a new branch here in alphabetical order if a new
// op is added.
switch op {
case fuzzAbs:
err = fuzzImpl.Abs()
case fuzzAdd:
err = fuzzImpl.Add()
case fuzzAdd64:
err = fuzzImpl.Add64()
case fuzzAnd:
err = fuzzImpl.And()
case fuzzAnd64:
err = fuzzImpl.And64()
case fuzzAndNot:
err = fuzzImpl.AndNot()
case fuzzAsFloat64:
err = fuzzImpl.AsFloat64()
case fuzzBinBE:
err = fuzzImpl.BinBE()
case fuzzBinLE:
err = fuzzImpl.BinLE()
case fuzzBit:
err = fuzzImpl.Bit()
case fuzzBitLen:
err = fuzzImpl.BitLen()
case fuzzCmp:
err = fuzzImpl.Cmp()
case fuzzCmp64:
err = fuzzImpl.Cmp64()
case fuzzDec:
err = fuzzImpl.Dec()
case fuzzEqual:
err = fuzzImpl.Equal()
case fuzzEqual64:
err = fuzzImpl.Equal64()
case fuzzFromFloat64:
err = fuzzImpl.FromFloat64()
case fuzzGreaterOrEqualTo:
err = fuzzImpl.GreaterOrEqualTo()
case fuzzGreaterOrEqualTo64:
err = fuzzImpl.GreaterOrEqualTo64()
case fuzzGreaterThan:
err = fuzzImpl.GreaterThan()
case fuzzGreaterThan64:
err = fuzzImpl.GreaterThan64()
case fuzzInc:
err = fuzzImpl.Inc()
case fuzzLessOrEqualTo:
err = fuzzImpl.LessOrEqualTo()
case fuzzLessOrEqualTo64:
err = fuzzImpl.LessOrEqualTo64()
case fuzzLessThan:
err = fuzzImpl.LessThan()
case fuzzLessThan64:
err = fuzzImpl.LessThan64()
case fuzzLsh:
err = fuzzImpl.Lsh()
case fuzzMul:
err = fuzzImpl.Mul()
case fuzzMul64:
err = fuzzImpl.Mul64()
case fuzzNeg:
err = fuzzImpl.Neg()
case fuzzNot:
err = fuzzImpl.Not()
case fuzzOr:
err = fuzzImpl.Or()
case fuzzOr64:
err = fuzzImpl.Or64()
case fuzzQuo:
err = fuzzImpl.Quo()
case fuzzQuo64:
err = fuzzImpl.Quo64()
case fuzzQuoRem:
err = fuzzImpl.QuoRem()
case fuzzQuoRem64:
err = fuzzImpl.QuoRem64()
case fuzzRem:
err = fuzzImpl.Rem()
case fuzzRem64:
err = fuzzImpl.Rem64()
case fuzzRotateLeft:
err = fuzzImpl.RotateLeft()
case fuzzRsh:
err = fuzzImpl.Rsh()
case fuzzSetBit:
err = fuzzImpl.SetBit()
case fuzzString:
err = fuzzImpl.String()
case fuzzSub:
err = fuzzImpl.Sub()
case fuzzSub64:
err = fuzzImpl.Sub64()
case fuzzXor:
err = fuzzImpl.Xor()
case fuzzXor64:
err = fuzzImpl.Xor64()
default:
panic(fmt.Errorf("unsupported op %q", op))
}
if err != nil {
failures[implIdx][opIdx]++
failCount++
t.Logf("impl %s: %s\n%s\n\n", fuzzImpl.Name(), op.Print(source.Operands()...), err)
}
}
}
}
if failCount > 0 {
t.Logf(" ------------- UH OH! ------------")
t.Logf("")
t.Logf(` _.-^^---....,,-- `)
t.Logf(` _-- --_ `)
t.Logf(` < >) `)
t.Logf(` | | `)
t.Logf(` \._ _./ `)
t.Logf(" ```--. . , ; .--''' ")
t.Logf(` | | | `)
t.Logf(` .-=|| | |=-. `)
t.Logf(" `-=#$&&@$#=-' ")
t.Logf(` | ; :| `)
t.Logf(` _____.,-#$&$@$#&#~,._____ `)
t.Logf("")
}
for implIdx, implFailures := range failures {
fuzzImpl := fuzzTypes[implIdx]
for opIdx, cnt := range implFailures {
if cnt > 0 {
totalFailures += cnt
t.Logf("impl %s, op %s: %d/%d failed", fuzzImpl.Name(), string(runFuzzOps[opIdx]), cnt, fuzzIterations)
}
}
}
if totalFailures > 0 {
t.Fail()
}
}
func (op fuzzOp) Print(operands ...*big.Int) string {
// NEWOP: please add a human-readale format for your op here; this is used
// for reporting errors and should show the operation, i.e. "2 + 2".
//
// It should be safe to assume the appropriate number of operands are set
// in 'operands'; if not, it's a bug to be fixed elsewhere.
switch op {
case fuzzAsFloat64,
fuzzFromFloat64,
fuzzBinBE,
fuzzBinLE,
fuzzBitLen,
fuzzString:
s := strings.TrimRight(op.String(), "()")
return fmt.Sprintf("%s(%d)", s, operands[0])
case fuzzSetBit:
return fmt.Sprintf("%d|(1<<%d)", operands[0], operands[1])
case fuzzBit:
return fmt.Sprintf("(%b>>%d)&1", operands[0], operands[1])
case fuzzInc, fuzzDec:
return fmt.Sprintf("%d%s", operands[0], op.String())
case fuzzNeg, fuzzNot:
return fmt.Sprintf("%s%d", op.String(), operands[0])
case fuzzAbs:
return fmt.Sprintf("|%d|", operands[0])
case fuzzAdd, fuzzAdd64,
fuzzAnd, fuzzAnd64,
fuzzAndNot,
fuzzLessOrEqualTo, fuzzLessOrEqualTo64,
fuzzLessThan, fuzzLessThan64,
fuzzLsh,
fuzzMul, fuzzMul64,
fuzzOr, fuzzOr64,
fuzzQuo, fuzzQuo64,
fuzzQuoRem, fuzzQuoRem64,
fuzzRem, fuzzRem64,
fuzzRotateLeft,
fuzzRsh,
fuzzXor, fuzzXor64,
fuzzCmp,
fuzzEqual,
fuzzGreaterOrEqualTo, fuzzGreaterOrEqualTo64,
fuzzGreaterThan, fuzzGreaterThan64,
fuzzSub:
// simple binary case:
return fmt.Sprintf("%d %s %d", operands[0], op.String(), operands[1])
default:
return string(op)
}
}
func (op fuzzOp) String() string {
// NEWOP: please add a short string representation of this op, as if
// the operands were in a sum (if that's possible)
switch op {
case fuzzAbs:
return "|x|"
case fuzzAdd, fuzzAdd64:
return "+"
case fuzzAnd, fuzzAnd64:
return "&"
case fuzzAndNot:
return "&^"
case fuzzAsFloat64:
return "float64()"
case fuzzBit:
return "bit()"
case fuzzBitLen:
return "bitlen()"
case fuzzCmp, fuzzCmp64:
return "<=>"
case fuzzDec:
return "--"
case fuzzEqual, fuzzEqual64:
return "=="
case fuzzFromFloat64:
return "fromfloat64()"
case fuzzGreaterThan, fuzzGreaterThan64:
return ">"
case fuzzGreaterOrEqualTo, fuzzGreaterOrEqualTo64:
return ">="
case fuzzInc:
return "++"
case fuzzLessThan, fuzzLessThan64:
return "<"
case fuzzLessOrEqualTo, fuzzLessOrEqualTo64:
return "<="
case fuzzLsh:
return "<<"
case fuzzMul, fuzzMul64:
return "*"
case fuzzNeg:
return "-"
case fuzzNot:
return "^"
case fuzzOr:
return "|"
case fuzzQuo, fuzzQuo64:
return "/"
case fuzzQuoRem, fuzzQuoRem64:
return "/%"
case fuzzRem, fuzzRem64:
return "%"
case fuzzRotateLeft:
return "rotl()"
case fuzzRsh:
return ">>"
case fuzzSetBit:
return "setbit()"
case fuzzString:
return "string()"
case fuzzSub, fuzzSub64:
return "-"
case fuzzXor, fuzzXor64:
return "^"
default:
return string(op)
}
}
type fuzzU128 struct {
source *rando
}
func (f fuzzU128) Name() string { return "u128" }
func (f fuzzU128) Abs() error {
return nil // Always succeeds!
}
func (f fuzzU128) Inc() error {
b1 := f.source.BigU128()
u1 := accU128FromBigInt(b1)
rb := new(big.Int).Add(b1, big1)
ru := u1.Inc()
if rb.Cmp(wrapBigU128) >= 0 {
rb = new(big.Int).Sub(rb, wrapBigU128) // simulate overflow
}
return checkEqualU128("inc", ru, rb)
}
func (f fuzzU128) Dec() error {
b1 := f.source.BigU128()
u1 := accU128FromBigInt(b1)
rb := new(big.Int).Sub(b1, big1)
if rb.Cmp(big0) < 0 {
rb = new(big.Int).Add(wrapBigU128, rb) // simulate underflow
}
ru := u1.Dec()
return checkEqualU128("dec", ru, rb)
}
func (f fuzzU128) Add() error {
b1, b2 := f.source.BigU128x2()
u1, u2 := accU128FromBigInt(b1), accU128FromBigInt(b2)
rb := new(big.Int).Add(b1, b2)
rb = simulateBigU128Overflow(rb)
ru := u1.Add(u2)
return checkEqualU128("add", ru, rb)
}
func (f fuzzU128) Add64() error {
b1, b2 := f.source.BigU128And64()
u1, u2 := accU128FromBigInt(b1), accU64FromBigInt(b2)
rb := new(big.Int).Add(b1, b2)
rb = simulateBigU128Overflow(rb)
ru := u1.Add64(u2)
return checkEqualU128("add64", ru, rb)
}
func (f fuzzU128) Sub() error {
b1, b2 := f.source.BigU128x2()
u1, u2 := accU128FromBigInt(b1), accU128FromBigInt(b2)
rb := new(big.Int).Sub(b1, b2)
if rb.Cmp(big0) < 0 {
rb = new(big.Int).Add(wrapBigU128, rb) // simulate underflow
}
ru := u1.Sub(u2)
return checkEqualU128("sub", ru, rb)
}
func (f fuzzU128) Sub64() error {
b1, b2 := f.source.BigU128And64()
u1, u2 := accU128FromBigInt(b1), accU64FromBigInt(b2)
rb := new(big.Int).Sub(b1, b2)
if rb.Cmp(big0) < 0 {
rb = new(big.Int).Add(wrapBigU128, rb) // simulate underflow
}
ru := u1.Sub64(u2)
return checkEqualU128("sub64", ru, rb)
}
func (f fuzzU128) Mul() error {
b1, b2 := f.source.BigU128x2()
u1, u2 := accU128FromBigInt(b1), accU128FromBigInt(b2)
rb := new(big.Int).Mul(b1, b2)
rb = simulateBigU128Overflow(rb)
ru := u1.Mul(u2)
return checkEqualU128("mul", ru, rb)
}
func (f fuzzU128) Mul64() error {
b1, b2 := f.source.BigU128And64()
u1, u2 := accU128FromBigInt(b1), accU64FromBigInt(b2)
rb := new(big.Int).Mul(b1, b2)
rb = simulateBigU128Overflow(rb)
ru := u1.Mul64(u2)
return checkEqualU128("mul64", ru, rb)
}
func (f fuzzU128) Quo() error {
b1, b2 := f.source.BigU128x2()
u1, u2 := accU128FromBigInt(b1), accU128FromBigInt(b2)
if b2.Cmp(big0) == 0 {
return nil // Just skip this iteration, we know what happens!
}
rb := new(big.Int).Quo(b1, b2)
ru := u1.Quo(u2)
return checkEqualU128("quo", ru, rb)
}
func (f fuzzU128) Quo64() error {
b1, b2 := f.source.BigU128And64()
u1, u2 := accU128FromBigInt(b1), accU64FromBigInt(b2)
if b2.Cmp(big0) == 0 {
return nil // Just skip this iteration, we know what happens!
}
rb := new(big.Int).Quo(b1, b2)
ru := u1.Quo64(u2)
return checkEqualU128("quo64", ru, rb)
}
func (f fuzzU128) Rem() error {
b1, b2 := f.source.BigU128x2()
u1, u2 := accU128FromBigInt(b1), accU128FromBigInt(b2)
if b2.Cmp(big0) == 0 {
return nil // Just skip this iteration, we know what happens!
}
rb := new(big.Int).Rem(b1, b2)
ru := u1.Rem(u2)
return checkEqualU128("rem", ru, rb)
}
func (f fuzzU128) Rem64() error {
b1, b2 := f.source.BigU128And64()
u1, u2 := accU128FromBigInt(b1), accU64FromBigInt(b2)
if b2.Cmp(big0) == 0 {
return nil // Just skip this iteration, we know what happens!
}
rb := new(big.Int).Rem(b1, b2)
ru := u1.Rem64(u2)
return checkEqualU128("rem64", ru, rb)
}
func (f fuzzU128) QuoRem() error {
b1, b2 := f.source.BigU128x2()
u1, u2 := accU128FromBigInt(b1), accU128FromBigInt(b2)
if b2.Cmp(big0) == 0 {
return nil // Just skip this iteration, we know what happens!
}
rbq := new(big.Int).Quo(b1, b2)
rbr := new(big.Int).Rem(b1, b2)
ruq, rur := u1.QuoRem(u2)
if err := checkEqualU128("quo", ruq, rbq); err != nil {
return err
}
if err := checkEqualU128("rem", rur, rbr); err != nil {
return err
}
return nil
}
func (f fuzzU128) QuoRem64() error {
b1, b2 := f.source.BigU128And64()
u1, u2 := accU128FromBigInt(b1), accU64FromBigInt(b2)
if b2.Cmp(big0) == 0 {
return nil // Just skip this iteration, we know what happens!
}
rbq := new(big.Int).Quo(b1, b2)
rbr := new(big.Int).Rem(b1, b2)
ruq, rur := u1.QuoRem64(u2)
if err := checkEqualU128("quo64", ruq, rbq); err != nil {
return err
}
if err := checkEqualU128("rem64", rur, rbr); err != nil {
return err
}
return nil
}
func (f fuzzU128) Cmp() error {
b1, b2 := f.source.BigU128x2()
u1, u2 := accU128FromBigInt(b1), accU128FromBigInt(b2)
return checkEqualInt(u1.Cmp(u2), b1.Cmp(b2))
}
func (f fuzzU128) Cmp64() error {
b1, b2 := f.source.BigU128And64()
u1, u2 := accU128FromBigInt(b1), accU64FromBigInt(b2)
return checkEqualInt(u1.Cmp64(u2), b1.Cmp(b2))
}
func (f fuzzU128) Equal() error {
b1, b2 := f.source.BigU128x2()
u1, u2 := accU128FromBigInt(b1), accU128FromBigInt(b2)
return checkEqualBool(u1.Equal(u2), b1.Cmp(b2) == 0)
}
func (f fuzzU128) Equal64() error {
b1, b2 := f.source.BigU128And64()
u1, u2 := accU128FromBigInt(b1), accU64FromBigInt(b2)
return checkEqualBool(u1.Equal64(u2), b1.Cmp(b2) == 0)
}
func (f fuzzU128) GreaterThan() error {
b1, b2 := f.source.BigU128x2()
u1, u2 := accU128FromBigInt(b1), accU128FromBigInt(b2)
return checkEqualBool(u1.GreaterThan(u2), b1.Cmp(b2) > 0)
}
func (f fuzzU128) GreaterThan64() error {
b1, b2 := f.source.BigU128And64()
u1, u2 := accU128FromBigInt(b1), accU64FromBigInt(b2)
return checkEqualBool(u1.GreaterThan64(u2), b1.Cmp(b2) > 0)
}
func (f fuzzU128) GreaterOrEqualTo() error {
b1, b2 := f.source.BigU128x2()
u1, u2 := accU128FromBigInt(b1), accU128FromBigInt(b2)
return checkEqualBool(u1.GreaterOrEqualTo(u2), b1.Cmp(b2) >= 0)
}
func (f fuzzU128) GreaterOrEqualTo64() error {
b1, b2 := f.source.BigU128And64()
u1, u2 := accU128FromBigInt(b1), accU64FromBigInt(b2)
return checkEqualBool(u1.GreaterOrEqualTo64(u2), b1.Cmp(b2) >= 0)
}
func (f fuzzU128) LessThan() error {
b1, b2 := f.source.BigU128x2()
u1, u2 := accU128FromBigInt(b1), accU128FromBigInt(b2)
return checkEqualBool(u1.LessThan(u2), b1.Cmp(b2) < 0)
}
func (f fuzzU128) LessThan64() error {
b1, b2 := f.source.BigU128And64()
u1, u2 := accU128FromBigInt(b1), accU64FromBigInt(b2)
return checkEqualBool(u1.LessThan64(u2), b1.Cmp(b2) < 0)
}
func (f fuzzU128) LessOrEqualTo() error {
b1, b2 := f.source.BigU128x2()
u1, u2 := accU128FromBigInt(b1), accU128FromBigInt(b2)
return checkEqualBool(u1.LessOrEqualTo(u2), b1.Cmp(b2) <= 0)
}
func (f fuzzU128) LessOrEqualTo64() error {
b1, b2 := f.source.BigU128And64()
u1, u2 := accU128FromBigInt(b1), accU64FromBigInt(b2)
return checkEqualBool(u1.LessOrEqualTo64(u2), b1.Cmp(b2) <= 0)
}
func (f fuzzU128) And() error {
b1, b2 := f.source.BigU128x2()
u1, u2 := accU128FromBigInt(b1), accU128FromBigInt(b2)
rb := new(big.Int).And(b1, b2)
ru := u1.And(u2)
return checkEqualU128("and", ru, rb)
}
func (f fuzzU128) And64() error {
b1, b2 := f.source.BigU128And64()
u1, u2 := accU128FromBigInt(b1), accU64FromBigInt(b2)
rb := new(big.Int).And(b1, b2)
ru := u1.And64(u2)
return checkEqualU128("and64", ru, rb)
}
func (f fuzzU128) AndNot() error {
b1, b2 := f.source.BigU128x2()
u1, u2 := accU128FromBigInt(b1), accU128FromBigInt(b2)
rb := new(big.Int).AndNot(b1, b2)
ru := u1.AndNot(u2)
return checkEqualU128("andnot", ru, rb)
}
func (f fuzzU128) Or() error {
b1, b2 := f.source.BigU128x2()
u1, u2 := accU128FromBigInt(b1), accU128FromBigInt(b2)
rb := new(big.Int).Or(b1, b2)
ru := u1.Or(u2)
return checkEqualU128("or", ru, rb)
}
func (f fuzzU128) Or64() error {
b1, b2 := f.source.BigU128And64()
u1, u2 := accU128FromBigInt(b1), accU64FromBigInt(b2)
rb := new(big.Int).Or(b1, b2)
ru := u1.Or64(u2)
return checkEqualU128("or", ru, rb)
}
func (f fuzzU128) Xor() error {
b1, b2 := f.source.BigU128x2()
u1, u2 := accU128FromBigInt(b1), accU128FromBigInt(b2)
rb := new(big.Int).Xor(b1, b2)
ru := u1.Xor(u2)
return checkEqualU128("xor", ru, rb)
}
func (f fuzzU128) Xor64() error {
b1, b2 := f.source.BigU128And64()
u1, u2 := accU128FromBigInt(b1), accU64FromBigInt(b2)
rb := new(big.Int).Xor(b1, b2)
ru := u1.Xor64(u2)
return checkEqualU128("xor", ru, rb)
}
func (f fuzzU128) Lsh() error {
b1, by := f.source.BigU128AndBitSize()
u1 := accU128FromBigInt(b1)
rb := new(big.Int).Lsh(b1, by)
rb.And(rb, maxBigU128)
ru := u1.Lsh(by)
return checkEqualU128("lsh", ru, rb)
}
func (f fuzzU128) Rsh() error {
b1, by := f.source.BigU128AndBitSize()
u1 := accU128FromBigInt(b1)
rb := new(big.Int).Rsh(b1, by)
ru := u1.Rsh(by)
return checkEqualU128("rsh", ru, rb)
}
func (f fuzzU128) RotateLeft() error {
b1, by := f.source.BigU128AndBitSize()
u1 := accU128FromBigInt(b1)
rb1 := new(big.Int).Set(b1)
rb1.Lsh(rb1, by)
rb1.And(rb1, maxBigU128)
rb2 := new(big.Int).Set(b1)
rb2.Rsh(rb2, 128-by)
rb1.Or(rb1, rb2)
// FIXME: this does not check RotateLeft with a negative input:
ru := u1.RotateLeft(int(by))
return checkEqualU128("rotl", ru, rb1)
}
func (f fuzzU128) Neg() error {
return nil // nothing to do here
}
func (f fuzzU128) BinBE() error {
b1 := f.source.BigU128()
u1 := accU128FromBigInt(b1)
b1bts := make([]byte, 16)
b1.FillBytes(b1bts)
u1bts := make([]byte, 16)
u1.PutBigEndian(u1bts)
if err := checkEqualBytes("binbe", b1bts, u1bts); err != nil {
return err
}
u2 := MustU128FromBigEndian(u1bts)
if !u1.Equal(u2) {
return fmt.Errorf("binbe: u128(%s) != u128(%s)", u1.String(), u2.String())
}
return nil
}
func (f fuzzU128) BinLE() error {
b1 := f.source.BigU128()
u1 := accU128FromBigInt(b1)
b1bts := make([]byte, 16)
b1.FillBytes(b1bts)
// big.Int writes big endian; reverse the slice:
for i, j := 0, len(b1bts)-1; i < j; i, j = i+1, j-1 {
b1bts[i], b1bts[j] = b1bts[j], b1bts[i]
}
u1bts := make([]byte, 16)
u1.PutLittleEndian(u1bts)
if err := checkEqualBytes("binle", b1bts, u1bts); err != nil {
return err
}
u2 := MustU128FromLittleEndian(u1bts)
if !u1.Equal(u2) {
return fmt.Errorf("binbe: u128(%s) != u128(%s)", u1.String(), u2.String())
}
return nil
}
func (f fuzzU128) AsFloat64() error {
b1 := f.source.BigU128()
u1 := accU128FromBigInt(b1)
bf := new(big.Float).SetInt(b1)
ruf := u1.AsFloat64()
return checkFloat(b1, ruf, bf)
}
func (f fuzzU128) FromFloat64() error {
b1 := f.source.BigU128()
u1 := accU128FromBigInt(b1)
bf1 := new(big.Float).SetInt(b1)
f64, _ := bf1.Float64()
if f64 == u128FloatLimit {
// This is a bit of a cheat to allow rando to use MaxU128, which is
// technically unrepresentable as a float64 due to precision errors.
// The float64 after converting MaxU128 will be the next representable
// float _after_ the maximum one representable within a 128-bit integer.
f64 = maxRepresentableU128Float
}
r1, inRange := U128FromFloat64(f64)
if !inRange {
panic(fmt.Errorf("float out of u128 range; expected <= %s, found %f", u1, f64)) // FIXME: error
}
diff := DifferenceU128(u1, r1)
isZero := b1.Cmp(big0) == 0
if isZero {
return checkEqualU128("fromfloat64", r1, b1)
} else {
diffFloat := new(big.Float).Quo(diff.AsBigFloat(), bf1)
if diffFloat.Cmp(floatDiffLimit) > 0 {
return fmt.Errorf("|128(%s) - big(%s)| = %s, > %s", r1, b1,
cleanFloatStr(fmt.Sprintf("%s", diff)),
cleanFloatStr(fmt.Sprintf("%.20f", floatDiffLimit)))
}
}
return nil
}
func (f fuzzU128) String() error {
b1 := f.source.BigU128()
u1 := accU128FromBigInt(b1)
return checkEqualString(u1, b1)
}
func (f fuzzU128) SetBit() error {
b1, bt, bv := f.source.BigU128AndBitSizeAndBitValue()
u1 := accU128FromBigInt(b1)