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accept memory and gpu memory in GiB instead of MiB #36
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,153 @@ | ||
| // Copyright Amazon.com Inc. or its affiliates. All Rights Reserved. | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"). You may | ||
| // not use this file except in compliance with the License. A copy of the | ||
| // License is located at | ||
| // | ||
| // http://aws.amazon.com/apache2.0/ | ||
| // | ||
| // or in the "license" file accompanying this file. This file is distributed | ||
| // on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either | ||
| // express or implied. See the License for the specific language governing | ||
| // permissions and limitations under the License. | ||
|
|
||
| package bytequantity | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "math" | ||
| "regexp" | ||
| "strconv" | ||
| "strings" | ||
| ) | ||
|
|
||
| const ( | ||
| /// Examples: 1mb, 1 gb, 1.0tb, 1mib, 2g, 2.001 t | ||
| byteQuantityRegex = `^([0-9]+\.?[0-9]{0,3})[ ]?(mi?b?|gi?b?|ti?b?)?$` | ||
| mib = "MiB" | ||
| gib = "GiB" | ||
| tib = "TiB" | ||
| gbConvert = 1 << 10 | ||
| tbConvert = gbConvert << 10 | ||
| maxGiB = math.MaxUint64 / gbConvert | ||
| maxTiB = math.MaxUint64 / tbConvert | ||
| ) | ||
|
|
||
| // ByteQuantity is a data type representing a byte quantity | ||
| type ByteQuantity struct { | ||
| Quantity uint64 | ||
| } | ||
|
|
||
| // ParseToByteQuantity parses a string representation of a byte quantity to a ByteQuantity type. | ||
| // A unit can be appended such as 16 GiB. If no unit is appended, GiB is assumed. | ||
| func ParseToByteQuantity(byteQuantityStr string) (ByteQuantity, error) { | ||
| bqRegexp := regexp.MustCompile(byteQuantityRegex) | ||
| matches := bqRegexp.FindStringSubmatch(strings.ToLower(byteQuantityStr)) | ||
| if len(matches) < 2 { | ||
| return ByteQuantity{}, fmt.Errorf("%s is not a valid byte quantity", byteQuantityStr) | ||
| } | ||
|
|
||
| quantityStr := matches[1] | ||
| unit := gib | ||
| if len(matches) > 2 && matches[2] != "" { | ||
| unit = matches[2] | ||
| } | ||
| quantity := uint64(0) | ||
| switch strings.ToLower(string(unit[0])) { | ||
| //mib | ||
| case "m": | ||
| inputDecSplit := strings.Split(quantityStr, ".") | ||
| if len(inputDecSplit) == 2 { | ||
| d, err := strconv.Atoi(inputDecSplit[1]) | ||
| if err != nil { | ||
| return ByteQuantity{}, err | ||
| } | ||
| if d != 0 { | ||
| return ByteQuantity{}, fmt.Errorf("cannot accept floating point MB value, only integers are accepted") | ||
| } | ||
| } | ||
| // need error here so that this quantity doesn't bind in the local scope | ||
| var err error | ||
| quantity, err = strconv.ParseUint(inputDecSplit[0], 10, 64) | ||
| if err != nil { | ||
| return ByteQuantity{}, err | ||
| } | ||
| //gib | ||
| case "g": | ||
| quantityDec, err := strconv.ParseFloat(quantityStr, 10) | ||
| if err != nil { | ||
| return ByteQuantity{}, err | ||
| } | ||
| if quantityDec > maxGiB { | ||
| return ByteQuantity{}, fmt.Errorf("error GiB value is too large") | ||
| } | ||
| quantity = uint64(quantityDec * gbConvert) | ||
| //tib | ||
| case "t": | ||
| quantityDec, err := strconv.ParseFloat(quantityStr, 10) | ||
| if err != nil { | ||
| return ByteQuantity{}, err | ||
| } | ||
| if quantityDec > maxTiB { | ||
| return ByteQuantity{}, fmt.Errorf("error TiB value is too large") | ||
| } | ||
| quantity = uint64(quantityDec * tbConvert) | ||
| default: | ||
| return ByteQuantity{}, fmt.Errorf("error unit %s is not supported", unit) | ||
| } | ||
|
|
||
| return ByteQuantity{ | ||
| Quantity: quantity, | ||
| }, nil | ||
| } | ||
|
|
||
| // FromTiB returns a byte quantity of the passed in tebibytes quantity | ||
| func FromTiB(tib uint64) ByteQuantity { | ||
| return ByteQuantity{ | ||
| Quantity: tib * tbConvert, | ||
| } | ||
| } | ||
|
|
||
| // FromGiB returns a byte quantity of the passed in gibibytes quantity | ||
| func FromGiB(gib uint64) ByteQuantity { | ||
| return ByteQuantity{ | ||
| Quantity: gib * gbConvert, | ||
| } | ||
| } | ||
|
|
||
| // FromMiB returns a byte quantity of the passed in mebibytes quantity | ||
| func FromMiB(mib uint64) ByteQuantity { | ||
| return ByteQuantity{ | ||
| Quantity: mib, | ||
| } | ||
| } | ||
|
|
||
| // StringMiB returns a byte quantity in a mebibytes string representation | ||
| func (bq ByteQuantity) StringMiB() string { | ||
| return fmt.Sprintf("%.0f %s", bq.MiB(), mib) | ||
| } | ||
|
|
||
| // StringGiB returns a byte quantity in a gibibytes string representation | ||
| func (bq ByteQuantity) StringGiB() string { | ||
| return fmt.Sprintf("%.3f %s", bq.GiB(), gib) | ||
| } | ||
|
|
||
| // StringTiB returns a byte quantity in a tebibytes string representation | ||
| func (bq ByteQuantity) StringTiB() string { | ||
| return fmt.Sprintf("%.3f %s", bq.TiB(), tib) | ||
| } | ||
|
|
||
| // MiB returns a byte quantity in mebibytes | ||
| func (bq ByteQuantity) MiB() float64 { | ||
| return float64(bq.Quantity) | ||
| } | ||
|
|
||
| // GiB returns a byte quantity in gibibytes | ||
| func (bq ByteQuantity) GiB() float64 { | ||
| return float64(bq.Quantity) * 1 / gbConvert | ||
| } | ||
|
|
||
| // TiB returns a byte quantity in tebibytes | ||
| func (bq ByteQuantity) TiB() float64 { | ||
| return float64(bq.Quantity) * 1 / tbConvert | ||
| } | ||
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