diff options
Diffstat (limited to 'vendor/github.com/docker/go-units/size.go')
| -rw-r--r-- | vendor/github.com/docker/go-units/size.go | 70 |
1 files changed, 58 insertions, 12 deletions
diff --git a/vendor/github.com/docker/go-units/size.go b/vendor/github.com/docker/go-units/size.go index 85f6ab071..c245a8951 100644 --- a/vendor/github.com/docker/go-units/size.go +++ b/vendor/github.com/docker/go-units/size.go @@ -2,7 +2,6 @@ package units import ( "fmt" - "regexp" "strconv" "strings" ) @@ -26,16 +25,17 @@ const ( PiB = 1024 * TiB ) -type unitMap map[string]int64 +type unitMap map[byte]int64 var ( - decimalMap = unitMap{"k": KB, "m": MB, "g": GB, "t": TB, "p": PB} - binaryMap = unitMap{"k": KiB, "m": MiB, "g": GiB, "t": TiB, "p": PiB} - sizeRegex = regexp.MustCompile(`^(\d+(\.\d+)*) ?([kKmMgGtTpP])?[iI]?[bB]?$`) + decimalMap = unitMap{'k': KB, 'm': MB, 'g': GB, 't': TB, 'p': PB} + binaryMap = unitMap{'k': KiB, 'm': MiB, 'g': GiB, 't': TiB, 'p': PiB} ) -var decimapAbbrs = []string{"B", "kB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB"} -var binaryAbbrs = []string{"B", "KiB", "MiB", "GiB", "TiB", "PiB", "EiB", "ZiB", "YiB"} +var ( + decimapAbbrs = []string{"B", "kB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB"} + binaryAbbrs = []string{"B", "KiB", "MiB", "GiB", "TiB", "PiB", "EiB", "ZiB", "YiB"} +) func getSizeAndUnit(size float64, base float64, _map []string) (float64, string) { i := 0 @@ -89,20 +89,66 @@ func RAMInBytes(size string) (int64, error) { // Parses the human-readable size string into the amount it represents. func parseSize(sizeStr string, uMap unitMap) (int64, error) { - matches := sizeRegex.FindStringSubmatch(sizeStr) - if len(matches) != 4 { + // TODO: rewrite to use strings.Cut if there's a space + // once Go < 1.18 is deprecated. + sep := strings.LastIndexAny(sizeStr, "01234567890. ") + if sep == -1 { + // There should be at least a digit. return -1, fmt.Errorf("invalid size: '%s'", sizeStr) } + var num, sfx string + if sizeStr[sep] != ' ' { + num = sizeStr[:sep+1] + sfx = sizeStr[sep+1:] + } else { + // Omit the space separator. + num = sizeStr[:sep] + sfx = sizeStr[sep+1:] + } - size, err := strconv.ParseFloat(matches[1], 64) + size, err := strconv.ParseFloat(num, 64) if err != nil { return -1, err } + // Backward compatibility: reject negative sizes. + if size < 0 { + return -1, fmt.Errorf("invalid size: '%s'", sizeStr) + } + + if len(sfx) == 0 { + return int64(size), nil + } - unitPrefix := strings.ToLower(matches[3]) - if mul, ok := uMap[unitPrefix]; ok { + // Process the suffix. + + if len(sfx) > 3 { // Too long. + goto badSuffix + } + sfx = strings.ToLower(sfx) + // Trivial case: b suffix. + if sfx[0] == 'b' { + if len(sfx) > 1 { // no extra characters allowed after b. + goto badSuffix + } + return int64(size), nil + } + // A suffix from the map. + if mul, ok := uMap[sfx[0]]; ok { size *= float64(mul) + } else { + goto badSuffix + } + + // The suffix may have extra "b" or "ib" (e.g. KiB or MB). + switch { + case len(sfx) == 2 && sfx[1] != 'b': + goto badSuffix + case len(sfx) == 3 && sfx[1:] != "ib": + goto badSuffix } return int64(size), nil + +badSuffix: + return -1, fmt.Errorf("invalid suffix: '%s'", sfx) } |