diff options
Diffstat (limited to 'vendor/github.com/ugorji/go/codec/cbor.base.go')
| -rw-r--r-- | vendor/github.com/ugorji/go/codec/cbor.base.go | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/vendor/github.com/ugorji/go/codec/cbor.base.go b/vendor/github.com/ugorji/go/codec/cbor.base.go new file mode 100644 index 000000000..fad562a63 --- /dev/null +++ b/vendor/github.com/ugorji/go/codec/cbor.base.go @@ -0,0 +1,160 @@ +// Copyright (c) 2012-2020 Ugorji Nwoke. All rights reserved. +// Use of this source code is governed by a MIT license found in the LICENSE file. + +package codec + +import ( + "reflect" +) + +// major +const ( + cborMajorUint byte = iota + cborMajorNegInt + cborMajorBytes + cborMajorString + cborMajorArray + cborMajorMap + cborMajorTag + cborMajorSimpleOrFloat +) + +// simple +const ( + cborBdFalse byte = 0xf4 + iota + cborBdTrue + cborBdNil + cborBdUndefined + cborBdExt + cborBdFloat16 + cborBdFloat32 + cborBdFloat64 +) + +// indefinite +const ( + cborBdIndefiniteBytes byte = 0x5f + cborBdIndefiniteString byte = 0x7f + cborBdIndefiniteArray byte = 0x9f + cborBdIndefiniteMap byte = 0xbf + cborBdBreak byte = 0xff +) + +// These define some in-stream descriptors for +// manual encoding e.g. when doing explicit indefinite-length +const ( + CborStreamBytes byte = 0x5f + CborStreamString byte = 0x7f + CborStreamArray byte = 0x9f + CborStreamMap byte = 0xbf + CborStreamBreak byte = 0xff +) + +// base values +const ( + cborBaseUint byte = 0x00 + cborBaseNegInt byte = 0x20 + cborBaseBytes byte = 0x40 + cborBaseString byte = 0x60 + cborBaseArray byte = 0x80 + cborBaseMap byte = 0xa0 + cborBaseTag byte = 0xc0 + cborBaseSimple byte = 0xe0 +) + +// const ( +// cborSelfDesrTag byte = 0xd9 +// cborSelfDesrTag2 byte = 0xd9 +// cborSelfDesrTag3 byte = 0xf7 +// ) + +var ( + cbordescSimpleNames = map[byte]string{ + cborBdNil: "nil", + cborBdFalse: "false", + cborBdTrue: "true", + cborBdFloat16: "float", + cborBdFloat32: "float", + cborBdFloat64: "float", + cborBdBreak: "break", + } + cbordescIndefNames = map[byte]string{ + cborBdIndefiniteBytes: "bytes*", + cborBdIndefiniteString: "string*", + cborBdIndefiniteArray: "array*", + cborBdIndefiniteMap: "map*", + } + cbordescMajorNames = map[byte]string{ + cborMajorUint: "(u)int", + cborMajorNegInt: "int", + cborMajorBytes: "bytes", + cborMajorString: "string", + cborMajorArray: "array", + cborMajorMap: "map", + cborMajorTag: "tag", + cborMajorSimpleOrFloat: "simple", + } +) + +func cbordesc(bd byte) (s string) { + bm := bd >> 5 + if bm == cborMajorSimpleOrFloat { + s = cbordescSimpleNames[bd] + } else { + s = cbordescMajorNames[bm] + if s == "" { + s = cbordescIndefNames[bd] + } + } + if s == "" { + s = "unknown" + } + return +} + +// ------------------------- + +// CborHandle is a Handle for the CBOR encoding format, +// defined at http://tools.ietf.org/html/rfc7049 and documented further at http://cbor.io . +// +// CBOR is comprehensively supported, including support for: +// - indefinite-length arrays/maps/bytes/strings +// - (extension) tags in range 0..0xffff (0 .. 65535) +// - half, single and double-precision floats +// - all numbers (1, 2, 4 and 8-byte signed and unsigned integers) +// - nil, true, false, ... +// - arrays and maps, bytes and text strings +// +// None of the optional extensions (with tags) defined in the spec are supported out-of-the-box. +// Users can implement them as needed (using SetExt), including spec-documented ones: +// - timestamp, BigNum, BigFloat, Decimals, +// - Encoded Text (e.g. URL, regexp, base64, MIME Message), etc. +type CborHandle struct { + binaryEncodingType + notJsonType + // noElemSeparators + BasicHandle + + // IndefiniteLength=true, means that we encode using indefinitelength + IndefiniteLength bool + + // TimeRFC3339 says to encode time.Time using RFC3339 format. + // If unset, we encode time.Time using seconds past epoch. + TimeRFC3339 bool + + // SkipUnexpectedTags says to skip over any tags for which extensions are + // not defined. This is in keeping with the cbor spec on "Optional Tagging of Items". + // + // Furthermore, this allows the skipping over of the Self Describing Tag 0xd9d9f7. + SkipUnexpectedTags bool +} + +// Name returns the name of the handle: cbor +func (h *CborHandle) Name() string { return "cbor" } + +func (h *CborHandle) desc(bd byte) string { return cbordesc(bd) } + +// SetInterfaceExt sets an extension +func (h *CborHandle) SetInterfaceExt(rt reflect.Type, tag uint64, ext InterfaceExt) (err error) { + return h.SetExt(rt, tag, makeExt(ext)) +} |