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Golang Dec.SetScale方法代码示例

本文整理汇总了Golang中github.com/appc/spec/Godeps/_workspace/src/speter/net/go/exp/math/dec/inf.Dec.SetScale方法的典型用法代码示例。如果您正苦于以下问题:Golang Dec.SetScale方法的具体用法?Golang Dec.SetScale怎么用?Golang Dec.SetScale使用的例子?那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在github.com/appc/spec/Godeps/_workspace/src/speter/net/go/exp/math/dec/inf.Dec的用法示例。


在下文中一共展示了Dec.SetScale方法的3个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的Golang代码示例。

示例1: TestDecGobEncoding

func TestDecGobEncoding(t *testing.T) {
	var medium bytes.Buffer
	enc := gob.NewEncoder(&medium)
	dec := gob.NewDecoder(&medium)
	for i, test := range decGobEncodingTests {
		for j := 0; j < 2; j++ {
			for k := inf.Scale(-5); k <= 5; k++ {
				medium.Reset() // empty buffer for each test case (in case of failures)
				stest := test
				if j != 0 {
					// negative numbers
					stest = "-" + test
				}
				var tx inf.Dec
				tx.SetString(stest)
				tx.SetScale(k) // test with positive, negative, and zero scale
				if err := enc.Encode(&tx); err != nil {
					t.Errorf("#%d%c: encoding failed: %s", i, 'a'+j, err)
				}
				var rx inf.Dec
				if err := dec.Decode(&rx); err != nil {
					t.Errorf("#%d%c: decoding failed: %s", i, 'a'+j, err)
				}
				if rx.Cmp(&tx) != 0 {
					t.Errorf("#%d%c: transmission failed: got %s want %s", i, 'a'+j, &rx, &tx)
				}
			}
		}
	}
}
开发者ID:aybabtme,项目名称:spec,代码行数:30,代码来源:dec_test.go

示例2: ParseQuantity

// ParseQuantity turns str into a Quantity, or returns an error.
func ParseQuantity(str string) (*Quantity, error) {
	parts := splitRE.FindStringSubmatch(strings.TrimSpace(str))
	// regexp returns are entire match, followed by an entry for each () section.
	if len(parts) != 3 {
		return nil, ErrFormatWrong
	}

	amount := new(inf.Dec)
	if _, ok := amount.SetString(parts[1]); !ok {
		return nil, ErrNumeric
	}

	base, exponent, format, ok := quantitySuffixer.interpret(suffix(parts[2]))
	if !ok {
		return nil, ErrSuffix
	}

	// So that no one but us has to think about suffixes, remove it.
	if base == 10 {
		amount.SetScale(amount.Scale() + inf.Scale(-exponent))
	} else if base == 2 {
		// numericSuffix = 2 ** exponent
		numericSuffix := big.NewInt(1).Lsh(bigOne, uint(exponent))
		ub := amount.UnscaledBig()
		amount.SetUnscaledBig(ub.Mul(ub, numericSuffix))
	}

	// Cap at min/max bounds.
	sign := amount.Sign()
	if sign == -1 {
		amount.Neg(amount)
	}
	// This rounds non-zero values up to the minimum representable
	// value, under the theory that if you want some resources, you
	// should get some resources, even if you asked for way too small
	// of an amount.
	// Arguably, this should be inf.RoundHalfUp (normal rounding), but
	// that would have the side effect of rounding values < .5m to zero.
	if v, ok := amount.Unscaled(); v != int64(0) || !ok {
		amount.Round(amount, 3, inf.RoundUp)
	}

	// The max is just a simple cap.
	if amount.Cmp(maxAllowed) > 0 {
		amount.Set(maxAllowed)
	}
	if format == BinarySI && amount.Cmp(decOne) < 0 && amount.Cmp(decZero) > 0 {
		// This avoids rounding and hopefully confusion, too.
		format = DecimalSI
	}
	if sign == -1 {
		amount.Neg(amount)
	}

	return &Quantity{amount, format}, nil
}
开发者ID:aybabtme,项目名称:spec,代码行数:57,代码来源:quantity.go

示例3: TestDecGetString

func TestDecGetString(t *testing.T) {
	z := new(inf.Dec)
	for i, test := range decStringTests {
		if !test.ok {
			continue
		}
		z.SetUnscaled(test.val)
		z.SetScale(test.scale)

		s := z.String()
		if s != test.out {
			t.Errorf("#%da got %s; want %s", i, s, test.out)
		}

		s = fmt.Sprintf("%d", z)
		if s != test.out {
			t.Errorf("#%db got %s; want %s", i, s, test.out)
		}
	}
}
开发者ID:aybabtme,项目名称:spec,代码行数:20,代码来源:dec_test.go


注:本文中的github.com/appc/spec/Godeps/_workspace/src/speter/net/go/exp/math/dec/inf.Dec.SetScale方法示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台,相关代码片段筛选自各路编程大神贡献的开源项目,源码版权归原作者所有,传播和使用请参考对应项目的License;未经允许,请勿转载。