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75 lines
2.1 KiB
75 lines
2.1 KiB
// Copyright 2015 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Package internal contains code that is shared among encoding implementations.
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package internal
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import (
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"golang.org/x/text/encoding"
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"golang.org/x/text/encoding/internal/identifier"
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"golang.org/x/text/transform"
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)
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// Encoding is an implementation of the Encoding interface that adds the String
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// and ID methods to an existing encoding.
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type Encoding struct {
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encoding.Encoding
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Name string
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MIB identifier.MIB
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}
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// _ verifies that Encoding implements identifier.Interface.
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var _ identifier.Interface = (*Encoding)(nil)
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func (e *Encoding) String() string {
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return e.Name
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}
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func (e *Encoding) ID() (mib identifier.MIB, other string) {
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return e.MIB, ""
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}
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// SimpleEncoding is an Encoding that combines two Transformers.
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type SimpleEncoding struct {
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Decoder transform.Transformer
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Encoder transform.Transformer
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}
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func (e *SimpleEncoding) NewDecoder() *encoding.Decoder {
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return &encoding.Decoder{Transformer: e.Decoder}
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}
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func (e *SimpleEncoding) NewEncoder() *encoding.Encoder {
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return &encoding.Encoder{Transformer: e.Encoder}
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}
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// FuncEncoding is an Encoding that combines two functions returning a new
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// Transformer.
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type FuncEncoding struct {
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Decoder func() transform.Transformer
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Encoder func() transform.Transformer
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}
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func (e FuncEncoding) NewDecoder() *encoding.Decoder {
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return &encoding.Decoder{Transformer: e.Decoder()}
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}
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func (e FuncEncoding) NewEncoder() *encoding.Encoder {
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return &encoding.Encoder{Transformer: e.Encoder()}
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}
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// A RepertoireError indicates a rune is not in the repertoire of a destination
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// encoding. It is associated with an encoding-specific suggested replacement
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// byte.
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type RepertoireError byte
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// Error implements the error interrface.
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func (r RepertoireError) Error() string {
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return "encoding: rune not supported by encoding."
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}
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// Replacement returns the replacement string associated with this error.
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func (r RepertoireError) Replacement() byte { return byte(r) }
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var ErrASCIIReplacement = RepertoireError(encoding.ASCIISub)
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