45 lines
1.7 KiB
Go
45 lines
1.7 KiB
Go
package cbor
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// "Major types" enum, as per https://tools.ietf.org/html/rfc7049#section-2.1 .
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//
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// These numbers are the bottom of the range for that major type when encoded;
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// that is, ints can be between `cborMajorUint` (inclusive) and `cborMajorNegInt` (exclusive).
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// Zero out the 0x1f bitrange of a byte to see which major type it is (those bits are
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// used for packing either length info or other specific enumerated meanings).
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const (
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cborMajorUint byte = 0x00
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cborMajorNegInt = 0x20
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cborMajorBytes = 0x40
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cborMajorString = 0x60
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cborMajorArray = 0x80
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cborMajorMap = 0xa0
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cborMajorTag = 0xc0
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cborMajorSimple = 0xe0 // Floating point, "simple" types like bool, etc, are above.
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)
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// Enumeration of some values with single fixed-byte representations.
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// All of these are in the "simple" space.
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// See https://tools.ietf.org/html/rfc7049#section-2.3 for tables.
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// The prefix indicating a float is also packed into the simple space.
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const (
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cborSigilFalse byte = 0xf4
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cborSigilTrue = 0xf5
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cborSigilNil = 0xf6
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cborSigilUndefined = 0xf7
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cborSigilFloat16 = 0xf9
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cborSigilFloat32 = 0xfA
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cborSigilFloat64 = 0xfB
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)
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// The highest value in the range for bytes, text, arrays, and maps all indicate
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// an "indefinite length" / "streaming" entry coming up. These have a different parse path.
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// The special 'break' value from the "simple" space (all bits on)
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// indicates termination of stream for all four kinds major types in this mode.
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const (
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cborSigilIndefiniteBytes byte = 0x5f
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cborSigilIndefiniteString = 0x7f
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cborSigilIndefiniteArray = 0x9f
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cborSigilIndefiniteMap = 0xbf
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cborSigilBreak = 0xff
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)
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