예제 #1
0
func (b *bytesValue) Set(s string) error {
	v, err := humanizeutil.ParseBytes(s)
	if err != nil {
		return err
	}
	*b.val = v
	b.isSet = true
	return nil
}
예제 #2
0
파일: env.go 프로젝트: knz/cockroach
// EnvOrDefaultBytes returns the value set by the specified environment
// variable, if any, otherwise the specified default value.
func EnvOrDefaultBytes(name string, value int64) int64 {
	if str, present := getEnv(name, 1); present {
		v, err := humanizeutil.ParseBytes(str)
		if err != nil {
			log.Errorf(context.Background(), "error parsing %s: %s", name, err)
			return value
		}
		return v
	}
	return value
}
예제 #3
0
파일: store_spec.go 프로젝트: knz/cockroach
// newStoreSpec parses the string passed into a --store flag and returns a
// StoreSpec if it is correctly parsed.
// There are four possible fields that can be passed in, comma separated:
// - path=xxx The directory in which to the rocks db instance should be
//   located, required unless using a in memory storage.
// - type=mem This specifies that the store is an in memory storage instead of
//   an on disk one. mem is currently the only other type available.
// - size=xxx The optional maximum size of the storage. This can be in one of a
//   few different formats.
//   - 10000000000     -> 10000000000 bytes
//   - 20GB            -> 20000000000 bytes
//   - 20GiB           -> 21474836480 bytes
//   - 0.02TiB         -> 21474836480 bytes
//   - 20%             -> 20% of the available space
//   - 0.2             -> 20% of the available space
// - attrs=xxx:yyy:zzz A colon separated list of optional attributes.
// Note that commas are forbidden within any field name or value.
func newStoreSpec(value string) (StoreSpec, error) {
	if len(value) == 0 {
		return StoreSpec{}, fmt.Errorf("no value specified")
	}
	var ss StoreSpec
	used := make(map[string]struct{})
	for _, split := range strings.Split(value, ",") {
		if len(split) == 0 {
			continue
		}
		subSplits := strings.SplitN(split, "=", 2)
		var field string
		var value string
		if len(subSplits) == 1 {
			field = "path"
			value = subSplits[0]
		} else {
			field = strings.ToLower(subSplits[0])
			value = subSplits[1]
		}
		if _, ok := used[field]; ok {
			return StoreSpec{}, fmt.Errorf("%s field was used twice in store definition", field)
		}
		used[field] = struct{}{}

		if len(field) == 0 {
			continue
		}
		if len(value) == 0 {
			return StoreSpec{}, fmt.Errorf("no value specified for %s", field)
		}

		switch field {
		case "path":
			if len(value) == 0 {

			}
			ss.Path = value
		case "size":
			if len(value) == 0 {
				return StoreSpec{}, fmt.Errorf("no size specified")
			}

			if unicode.IsDigit(rune(value[len(value)-1])) &&
				(strings.HasPrefix(value, "0.") || strings.HasPrefix(value, ".")) {
				// Value is a percentage without % sign.
				var err error
				ss.SizePercent, err = strconv.ParseFloat(value, 64)
				ss.SizePercent *= 100
				if err != nil {
					return StoreSpec{}, fmt.Errorf("could not parse store size (%s) %s", value, err)
				}
				if ss.SizePercent > 100 || ss.SizePercent < 1 {
					return StoreSpec{}, fmt.Errorf("store size (%s) must be between 1%% and 100%%", value)
				}
			} else if strings.HasSuffix(value, "%") {
				// Value is a percentage.
				var err error
				ss.SizePercent, err = strconv.ParseFloat(value[:len(value)-1], 64)
				if err != nil {
					return StoreSpec{}, fmt.Errorf("could not parse store size (%s) %s", value, err)
				}
				if ss.SizePercent > 100 || ss.SizePercent < 1 {
					return StoreSpec{}, fmt.Errorf("store size (%s) must be between 1%% and 100%%", value)
				}
			} else {
				var err error
				ss.SizeInBytes, err = humanizeutil.ParseBytes(value)
				if err != nil {
					return StoreSpec{}, fmt.Errorf("could not parse store size (%s) %s", value, err)
				}
				if ss.SizeInBytes < MinimumStoreSize {
					return StoreSpec{}, fmt.Errorf("store size (%s) must be larger than %s", value,
						humanizeutil.IBytes(MinimumStoreSize))
				}
			}
		case "attrs":
			if len(value) == 0 {
				return StoreSpec{}, fmt.Errorf("no attributes specified")
			}
			// Check to make sure there are no duplicate attributes.
			attrMap := make(map[string]struct{})
			for _, attribute := range strings.Split(value, ":") {
				if _, ok := attrMap[attribute]; ok {
					return StoreSpec{}, fmt.Errorf("duplicate attribute given for store: %s", attribute)
				}
				attrMap[attribute] = struct{}{}
			}
			for attribute := range attrMap {
				ss.Attributes.Attrs = append(ss.Attributes.Attrs, attribute)
			}
			sort.Strings(ss.Attributes.Attrs)
		case "type":
			if value == "mem" {
				ss.InMemory = true
			} else {
				return StoreSpec{}, fmt.Errorf("%s is not a valid store type", value)
			}
		default:
			return StoreSpec{}, fmt.Errorf("%s is not a valid store field", field)
		}
	}
	if ss.InMemory {
		// Only in memory stores don't need a path and require a size.
		if ss.Path != "" {
			return StoreSpec{}, fmt.Errorf("path specified for in memory store")
		}
		if ss.SizePercent == 0 && ss.SizeInBytes == 0 {
			return StoreSpec{}, fmt.Errorf("size must be specified for an in memory store")
		}
	} else if ss.Path == "" {
		return StoreSpec{}, fmt.Errorf("no path specified")
	}
	return ss, nil
}
예제 #4
0
// TestHumanizeBytes verifies both IBytes and ParseBytes.
func TestBytes(t *testing.T) {
	defer leaktest.AfterTest(t)()

	testCases := []struct {
		value       int64
		exp         string
		expNeg      string
		parseExp    int64
		parseErr    string
		parseErrNeg string
	}{
		{0, "0 B", "0 B", 0, "", ""},
		{1024, "1.0 KiB", "-1.0 KiB", 1024, "", ""},
		{1024 << 10, "1.0 MiB", "-1.0 MiB", 1024 << 10, "", ""},
		{1024 << 20, "1.0 GiB", "-1.0 GiB", 1024 << 20, "", ""},
		{1024 << 30, "1.0 TiB", "-1.0 TiB", 1024 << 30, "", ""},
		{1024 << 40, "1.0 PiB", "-1.0 PiB", 1024 << 40, "", ""},
		{1024 << 50, "1.0 EiB", "-1.0 EiB", 1024 << 50, "", ""},
		{int64(math.MaxInt64), "8.0 EiB", "-8.0 EiB", 0, "too large: 8.0 EiB", "too large: -8.0 EiB"},
	}

	for i, testCase := range testCases {
		// Test IBytes.
		if actual := humanizeutil.IBytes(testCase.value); actual != testCase.exp {
			t.Errorf("%d: IBytes(%d) actual:%s does not match expected:%s", i, testCase.value, actual, testCase.exp)
		}
		// Test negative IBytes.
		if actual := humanizeutil.IBytes(-testCase.value); actual != testCase.expNeg {
			t.Errorf("%d: IBytes(%d) actual:%s does not match expected:%s", i, -testCase.value, actual,
				testCase.expNeg)
		}
		// Test ParseBytes.
		if actual, err := humanizeutil.ParseBytes(testCase.exp); err != nil {
			if len(testCase.parseErr) > 0 {
				if testCase.parseErr != err.Error() {
					t.Errorf("%d: ParseBytes(%s) caused an incorrect error actual:%s, expected:%s", i, testCase.exp,
						err, testCase.parseErr)
				}
			} else {
				t.Errorf("%d: ParseBytes(%s) caused an unexpected error:%s", i, testCase.exp, err)
			}
		} else if actual != testCase.parseExp {
			t.Errorf("%d: ParseBytes(%s) actual:%d does not match expected:%d", i, testCase.exp, actual,
				testCase.parseExp)
		}
		// Test negative ParseBytes.
		if actual, err := humanizeutil.ParseBytes(testCase.expNeg); err != nil {
			if len(testCase.parseErrNeg) > 0 {
				if testCase.parseErrNeg != err.Error() {
					t.Errorf("%d: ParseBytes(%s) caused an incorrect error actual:%s, expected:%s", i, testCase.expNeg,
						err, testCase.parseErrNeg)
				}
			} else {
				t.Errorf("%d: ParseBytes(%s) caused an unexpected error:%s", i, testCase.expNeg, err)
			}
		} else if actual != -testCase.parseExp {
			t.Errorf("%d: ParseBytes(%s) actual:%d does not match expected:%d", i, testCase.expNeg, actual,
				-testCase.parseExp)
		}
	}

	// Some extra error cases for good measure.
	testFailCases := []struct {
		value    string
		expected string
	}{
		{"", "parsing \"\": invalid syntax"},   // our error
		{"1 ZB", "unhandled size name: zb"},    // humanize's error
		{"-1 ZB", "unhandled size name: zb"},   // humanize's error
		{"1 ZiB", "unhandled size name: zib"},  // humanize's error
		{"-1 ZiB", "unhandled size name: zib"}, // humanize's error
		{"100 EiB", "too large: 100 EiB"},      // humanize's error
		{"-100 EiB", "too large: 100 EiB"},     // humanize's error
		{"10 EiB", "too large: 10 EiB"},        // our error
		{"-10 EiB", "too large: -10 EiB"},      // our error
	}
	for i, testCase := range testFailCases {
		if _, err := humanizeutil.ParseBytes(testCase.value); err.Error() != testCase.expected {
			t.Errorf("%d: ParseBytes(%s) caused an incorrect error actual:%s, expected:%s", i, testCase.value, err,
				testCase.expected)
		}
	}
}