diff options
Diffstat (limited to 'vendor/github.com/Azure/azure-storage-blob-go/2018-03-28/azblob/zc_uuid.go')
-rw-r--r-- | vendor/github.com/Azure/azure-storage-blob-go/2018-03-28/azblob/zc_uuid.go | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/vendor/github.com/Azure/azure-storage-blob-go/2018-03-28/azblob/zc_uuid.go b/vendor/github.com/Azure/azure-storage-blob-go/2018-03-28/azblob/zc_uuid.go new file mode 100644 index 000000000..1fc7e89cf --- /dev/null +++ b/vendor/github.com/Azure/azure-storage-blob-go/2018-03-28/azblob/zc_uuid.go @@ -0,0 +1,80 @@ +package azblob + +import ( + "crypto/rand" + "fmt" + "strconv" +) + +// The UUID reserved variants. +const ( + reservedNCS byte = 0x80 + reservedRFC4122 byte = 0x40 + reservedMicrosoft byte = 0x20 + reservedFuture byte = 0x00 +) + +// A UUID representation compliant with specification in RFC 4122 document. +type uuid [16]byte + +// NewUUID returns a new uuid using RFC 4122 algorithm. +func newUUID() (u uuid) { + u = uuid{} + // Set all bits to randomly (or pseudo-randomly) chosen values. + _, err := rand.Read(u[:]) + if err != nil { + panic("ran.Read failed") + } + u[8] = (u[8] | reservedRFC4122) & 0x7F // u.setVariant(ReservedRFC4122) + + var version byte = 4 + u[6] = (u[6] & 0xF) | (version << 4) // u.setVersion(4) + return +} + +// String returns an unparsed version of the generated UUID sequence. +func (u uuid) String() string { + return fmt.Sprintf("%x-%x-%x-%x-%x", u[0:4], u[4:6], u[6:8], u[8:10], u[10:]) +} + +// ParseUUID parses a string formatted as "003020100-0504-0706-0809-0a0b0c0d0e0f" +// or "{03020100-0504-0706-0809-0a0b0c0d0e0f}" into a UUID. +func parseUUID(uuidStr string) uuid { + char := func(hexString string) byte { + i, _ := strconv.ParseUint(hexString, 16, 8) + return byte(i) + } + if uuidStr[0] == '{' { + uuidStr = uuidStr[1:] // Skip over the '{' + } + // 03020100 - 05 04 - 07 06 - 08 09 - 0a 0b 0c 0d 0e 0f + // 1 11 1 11 11 1 12 22 2 22 22 22 33 33 33 + // 01234567 8 90 12 3 45 67 8 90 12 3 45 67 89 01 23 45 + uuidVal := uuid{ + char(uuidStr[0:2]), + char(uuidStr[2:4]), + char(uuidStr[4:6]), + char(uuidStr[6:8]), + + char(uuidStr[9:11]), + char(uuidStr[11:13]), + + char(uuidStr[14:16]), + char(uuidStr[16:18]), + + char(uuidStr[19:21]), + char(uuidStr[21:23]), + + char(uuidStr[24:26]), + char(uuidStr[26:28]), + char(uuidStr[28:30]), + char(uuidStr[30:32]), + char(uuidStr[32:34]), + char(uuidStr[34:36]), + } + return uuidVal +} + +func (u uuid) bytes() []byte { + return u[:] +} |