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  • package root
    Definition Classes
    root
  • package scodec

    Combinator library for working with binary data.

    Combinator library for working with binary data.

    The primary abstraction of this library is Codec, which provides the ability to encode/decode values to/from binary.

    There are more general abstractions though, such as Encoder and Decoder. There's also GenCodec which extends both Encoder and Decoder but allows the types to vary. Given these more general abstractions, a Codec[A] can be represented as a GenCodec[A, A].

    The more general abstractions are important because they allow operations on codecs that would not otherwise be possible. For example, given a Codec[A], mapping a function A => B over the codec yields a GenCodec[A, B]. Without the more general abstractions, map is impossible to define (e.g., how would codec.map(f).encode(b) be implemented?). Given a GenCodec[A, B], the encoding functionality can be ignored by treating it as a Decoder[B], or the encoding type can be changed via contramap. If after further transformations, the two types to GenCodec are equal, we can reconstitute a Codec from the GenCodec by calling fuse.

    See the codecs package object for pre-defined codecs for many common data types and combinators for building larger codecs out of smaller ones.

    For the categorically minded, note the following:

    • Decoder is a monad
    • Encoder is a contravariant functor
    • GenCodec is a profunctor
    • Codec is an invariant functor
    Definition Classes
    root
  • package codecs

    Provides codecs for common types and combinators for building larger codecs.

    Provides codecs for common types and combinators for building larger codecs.

    Bits and Bytes Codecs

    The simplest of the provided codecs are those that encode/decode BitVectors and ByteVectors directly. These are provided by bits and bytes methods. These codecs encode all of the bits/bytes directly in to the result and decode *all* of the remaining bits/bytes in to the result value. That is, the result of decode always returns a empty bit vector for the remaining bits.

    Similarly, fixed size alternatives are provided by the bits(size) and bytes(size) methods, which encode a fixed number of bits/bytes (or error if not provided the correct size) and decoded a fixed number of bits/bytes (or error if that many bits/bytes are not available).

    There are more specialized codecs for working with bits, including ignore and constant.

    Numeric Codecs

    There are built-in codecs for Int, Long, Float, and Double.

    There are a number of predefined integral codecs named using the form:

    [u]int$${size}[L]

    where u stands for unsigned, size is replaced by one of 8, 16, 24, 32, 64, and L stands for little-endian. For each codec of that form, the type is Codec[Int] or Codec[Long] depending on the specified size. For example, int32 supports 32-bit big-endian 2s complement signed integers, and uint16L supports 16-bit little-endian unsigned integers. Note: uint64[L] are not provided because a 64-bit unsigned integer does not fit in to a Long.

    Additionally, methods of the form [u]int[L](size: Int) and [u]long[L](size: Int) exist to build arbitrarily sized codecs, within the limitations of Int and Long.

    IEEE 754 floating point values are supported by the float, floatL, double, and doubleL codecs.

    Miscellaneous Value Codecs

    In addition to the numeric codecs, there are built-in codecs for Boolean, String, and UUID.

    Boolean values are supported by the bool codecs.

    Combinators

    There are a number of methods provided that create codecs out of other codecs. These include simple combinators such as fixedSizeBits and variableSizeBits and advanced combinators such as discriminated, which provides its own DSL for building a large codec out of many small codecs. For a list of all combinators, see the Combinators section below.

    Cryptography Codecs

    There are codecs that support working with encrypted data (encrypted), digital signatures and checksums (fixedSizeSignature and variableSizeSignature). Additionally, support for java.security.cert.Certificates is provided by certificate and x509Certificate.

    Definition Classes
    scodec
  • Attempt
  • BuildInfo
  • Codec
  • CodecTransformation
  • DecodeResult
  • Decoder
  • DecoderFunctions
  • DecodingContext
  • Encoder
  • EncoderFunctions
  • EnrichedCoproductDecoder
  • EnrichedCoproductEncoder
  • EnrichedHList
  • Err
  • GenCodec
  • HListCodecEnrichedWithHListSupport
  • SizeBound
  • Transform
  • TransformSyntax
  • Transformer
  • Tuple2CodecSupport
  • ValueCodecEnrichedWithGenericSupport
  • ValueCodecEnrichedWithHListSupport
t

scodec

DecoderFunctions

trait DecoderFunctions extends AnyRef

Provides functions for working with decoders.

Source
Decoder.scala
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  1. final def !=(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  2. final def ##(): Int
    Definition Classes
    AnyRef → Any
  3. def +(other: String): String
    Implicit
    This member is added by an implicit conversion from DecoderFunctions toany2stringadd[DecoderFunctions] performed by method any2stringadd in scala.Predef.
    Definition Classes
    any2stringadd
  4. def ->[B](y: B): (DecoderFunctions, B)
    Implicit
    This member is added by an implicit conversion from DecoderFunctions toArrowAssoc[DecoderFunctions] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc
    Annotations
    @inline()
  5. final def ==(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  6. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  7. final def choiceDecoder[A](decoders: Decoder[A]*): Decoder[A]

    Creates a decoder that decodes with each of the specified decoders, returning the first successful result.

  8. def clone(): AnyRef
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.CloneNotSupportedException]) @native()
  9. final def decodeAll[A, B](buffer: BitVector)(zero: B, append: (B, B) => B)(f: (A) => B)(implicit decoder: Lazy[Decoder[A]]): (Option[Err], B)

    Repeatedly decodes values of type A from the specified vector, converts each value to a B and appends it to an accumulator of type B using the supplied zero value and append function.

    Repeatedly decodes values of type A from the specified vector, converts each value to a B and appends it to an accumulator of type B using the supplied zero value and append function. Terminates when no more bits are available in the vector. Exits upon first decoding error.

    returns

    tuple consisting of the terminating error if any and the accumulated value

  10. final def decodeBoth[A, B](decA: Decoder[A], decB: Decoder[B])(buffer: BitVector): Attempt[DecodeResult[(A, B)]]

    Decodes a tuple (A, B) by first decoding A and then using the remaining bits to decode B.

  11. final def decodeBothCombine[A, B, C](decA: Decoder[A], decB: Decoder[B])(buffer: BitVector)(f: (A, B) => C): Attempt[DecodeResult[C]]

    Decodes a C by first decoding A and then using the remaining bits to decode B, then applying the decoded values to the specified function to generate a C.

  12. final def decodeCollect[F[_], A](dec: Decoder[A], limit: Option[Int])(buffer: BitVector)(implicit cbf: Factory[A, F[A]]): Attempt[DecodeResult[F[A]]]

    Repeatedly decodes values of type A from the specified vector and returns a collection of the specified type.

    Repeatedly decodes values of type A from the specified vector and returns a collection of the specified type. Terminates when no more bits are available in the vector or when limit is defined and that many records have been decoded. Exits upon first decoding error.

  13. def ensuring(cond: (DecoderFunctions) => Boolean, msg: => Any): DecoderFunctions
    Implicit
    This member is added by an implicit conversion from DecoderFunctions toEnsuring[DecoderFunctions] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  14. def ensuring(cond: (DecoderFunctions) => Boolean): DecoderFunctions
    Implicit
    This member is added by an implicit conversion from DecoderFunctions toEnsuring[DecoderFunctions] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  15. def ensuring(cond: Boolean, msg: => Any): DecoderFunctions
    Implicit
    This member is added by an implicit conversion from DecoderFunctions toEnsuring[DecoderFunctions] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  16. def ensuring(cond: Boolean): DecoderFunctions
    Implicit
    This member is added by an implicit conversion from DecoderFunctions toEnsuring[DecoderFunctions] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  17. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  18. def equals(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef → Any
  19. def finalize(): Unit
    Attributes
    protected[lang]
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    @throws(classOf[java.lang.Throwable])
  20. def formatted(fmtstr: String): String
    Implicit
    This member is added by an implicit conversion from DecoderFunctions toStringFormat[DecoderFunctions] performed by method StringFormat in scala.Predef.
    Definition Classes
    StringFormat
    Annotations
    @inline()
  21. final def getClass(): Class[_ <: AnyRef]
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    @native()
  22. def hashCode(): Int
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  23. final def isInstanceOf[T0]: Boolean
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  24. final def ne(arg0: AnyRef): Boolean
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  25. final def notify(): Unit
    Definition Classes
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    @native()
  26. final def notifyAll(): Unit
    Definition Classes
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    @native()
  27. final def synchronized[T0](arg0: => T0): T0
    Definition Classes
    AnyRef
  28. def toString(): String
    Definition Classes
    AnyRef → Any
  29. final def wait(): Unit
    Definition Classes
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    Annotations
    @throws(classOf[java.lang.InterruptedException])
  30. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
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    @throws(classOf[java.lang.InterruptedException])
  31. final def wait(arg0: Long): Unit
    Definition Classes
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    @throws(classOf[java.lang.InterruptedException]) @native()

Deprecated Value Members

  1. def [B](y: B): (DecoderFunctions, B)
    Implicit
    This member is added by an implicit conversion from DecoderFunctions toArrowAssoc[DecoderFunctions] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc
    Annotations
    @deprecated
    Deprecated

    (Since version 2.13.0) Use -> instead. If you still wish to display it as one character, consider using a font with programming ligatures such as Fira Code.

Inherited from AnyRef

Inherited from Any

Inherited by implicit conversion any2stringadd fromDecoderFunctions to any2stringadd[DecoderFunctions]

Inherited by implicit conversion StringFormat fromDecoderFunctions to StringFormat[DecoderFunctions]

Inherited by implicit conversion Ensuring fromDecoderFunctions to Ensuring[DecoderFunctions]

Inherited by implicit conversion ArrowAssoc fromDecoderFunctions to ArrowAssoc[DecoderFunctions]

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