diff options
author | Christopher Speller <crspeller@gmail.com> | 2016-05-12 15:08:58 -0400 |
---|---|---|
committer | Christopher Speller <crspeller@gmail.com> | 2016-05-12 16:37:29 -0400 |
commit | 84d2482ddbff9564c9ad75b2d30af66e3ddfd44d (patch) | |
tree | 8bfa567d2b6381f4a996ada2deff8a16aa85a3ac /Godeps/_workspace/src/gopkg.in/asn1-ber.v1/identifier.go | |
parent | d1efb66ad7b017f0fbfe6f0c20843b30f396e504 (diff) | |
download | chat-84d2482ddbff9564c9ad75b2d30af66e3ddfd44d.tar.gz chat-84d2482ddbff9564c9ad75b2d30af66e3ddfd44d.tar.bz2 chat-84d2482ddbff9564c9ad75b2d30af66e3ddfd44d.zip |
Updating go depencancies. Switching to go1.6 vendoring (#2949)
Diffstat (limited to 'Godeps/_workspace/src/gopkg.in/asn1-ber.v1/identifier.go')
-rw-r--r-- | Godeps/_workspace/src/gopkg.in/asn1-ber.v1/identifier.go | 103 |
1 files changed, 0 insertions, 103 deletions
diff --git a/Godeps/_workspace/src/gopkg.in/asn1-ber.v1/identifier.go b/Godeps/_workspace/src/gopkg.in/asn1-ber.v1/identifier.go deleted file mode 100644 index f7672a844..000000000 --- a/Godeps/_workspace/src/gopkg.in/asn1-ber.v1/identifier.go +++ /dev/null @@ -1,103 +0,0 @@ -package ber - -import ( - "errors" - "fmt" - "io" - "math" -) - -func readIdentifier(reader io.Reader) (Identifier, int, error) { - identifier := Identifier{} - read := 0 - - // identifier byte - b, err := readByte(reader) - if err != nil { - if Debug { - fmt.Printf("error reading identifier byte: %v\n", err) - } - return Identifier{}, read, err - } - read++ - - identifier.ClassType = Class(b) & ClassBitmask - identifier.TagType = Type(b) & TypeBitmask - - if tag := Tag(b) & TagBitmask; tag != HighTag { - // short-form tag - identifier.Tag = tag - return identifier, read, nil - } - - // high-tag-number tag - tagBytes := 0 - for { - b, err := readByte(reader) - if err != nil { - if Debug { - fmt.Printf("error reading high-tag-number tag byte %d: %v\n", tagBytes, err) - } - return Identifier{}, read, err - } - tagBytes++ - read++ - - // Lowest 7 bits get appended to the tag value (x.690, 8.1.2.4.2.b) - identifier.Tag <<= 7 - identifier.Tag |= Tag(b) & HighTagValueBitmask - - // First byte may not be all zeros (x.690, 8.1.2.4.2.c) - if tagBytes == 1 && identifier.Tag == 0 { - return Identifier{}, read, errors.New("invalid first high-tag-number tag byte") - } - // Overflow of int64 - // TODO: support big int tags? - if tagBytes > 9 { - return Identifier{}, read, errors.New("high-tag-number tag overflow") - } - - // Top bit of 0 means this is the last byte in the high-tag-number tag (x.690, 8.1.2.4.2.a) - if Tag(b)&HighTagContinueBitmask == 0 { - break - } - } - - return identifier, read, nil -} - -func encodeIdentifier(identifier Identifier) []byte { - b := []byte{0x0} - b[0] |= byte(identifier.ClassType) - b[0] |= byte(identifier.TagType) - - if identifier.Tag < HighTag { - // Short-form - b[0] |= byte(identifier.Tag) - } else { - // high-tag-number - b[0] |= byte(HighTag) - - tag := identifier.Tag - - highBit := uint(63) - for { - if tag&(1<<highBit) != 0 { - break - } - highBit-- - } - - tagBytes := int(math.Ceil(float64(highBit) / 7.0)) - for i := tagBytes - 1; i >= 0; i-- { - offset := uint(i) * 7 - mask := Tag(0x7f) << offset - tagByte := (tag & mask) >> offset - if i != 0 { - tagByte |= 0x80 - } - b = append(b, byte(tagByte)) - } - } - return b -} |