encoding

package
Version: v0.0.0-...-d539043 Latest Latest
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Published: Jul 15, 2015 License: ISC Imports: 3 Imported by: 0

Documentation

Overview

Package encoding defines an interface for character encodings, such as Shift JIS and Windows 1252, that can convert to and from UTF-8.

To convert the bytes of an io.Reader r from the encoding e to UTF-8:

rInUTF8 := transform.NewReader(r, e.NewDecoder())

and to convert from UTF-8 to the encoding e:

wInUTF8 := transform.NewWriter(w, e.NewEncoder())

In both cases, import "golang.org/x/text/transform".

Encoding implementations are provided in other packages, such as golang.org/x/text/encoding/charmap and golang.org/x/text/encoding/japanese.

Index

Constants

View Source
const ASCIISub = '\x1a'

ASCIISub is the ASCII substitute character, as recommended by http://unicode.org/reports/tr36/#Text_Comparison

Variables

View Source
var ErrInvalidUTF8 = errors.New("encoding: invalid UTF-8")

ErrInvalidUTF8 means that a transformer encountered invalid UTF-8.

View Source
var UTF8Validator transform.Transformer = utf8Validator{}

UTF8Validator is a transformer that returns ErrInvalidUTF8 on the first input byte that is not valid UTF-8.

Functions

This section is empty.

Types

type Encoding

type Encoding interface {
	// NewDecoder returns a transformer that converts to UTF-8.
	//
	// Transforming source bytes that are not of that encoding will not
	// result in an error per se. Each byte that cannot be transcoded will
	// be represented in the output by the UTF-8 encoding of '\uFFFD', the
	// replacement rune.
	NewDecoder() transform.Transformer

	// NewEncoder returns a transformer that converts from UTF-8.
	//
	// Transforming source bytes that are not valid UTF-8 will not result in
	// an error per se. Each rune that cannot be transcoded will be
	// represented in the output by an encoding-specific replacement such as
	// "\x1a" (the ASCII substitute character) or "\xff\xfd". To return
	// early with error instead, use transform.Chain to preprocess the data
	// with a UTF8Validator.
	NewEncoder() transform.Transformer
}

Encoding is a character set encoding that can be transformed to and from UTF-8.

var Nop Encoding = nop{}

Nop is the nop encoding. Its transformed bytes are the same as the source bytes; it does not replace invalid UTF-8 sequences.

var Replacement Encoding = replacement{}

Replacement is the replacement encoding. Decoding from the replacement encoding yields a single '\uFFFD' replacement rune. Encoding from UTF-8 to the replacement encoding yields the same as the source bytes except that invalid UTF-8 is converted to '\uFFFD'.

It is defined at http://encoding.spec.whatwg.org/#replacement

Source Files

Directories

Path Synopsis
Package charmap provides simple character encodings such as IBM Code Page 437 and Windows 1252.
Package charmap provides simple character encodings such as IBM Code Page 437 and Windows 1252.
Package japanese provides Japanese encodings such as EUC-JP and Shift JIS.
Package japanese provides Japanese encodings such as EUC-JP and Shift JIS.
Package korean provides Korean encodings such as EUC-KR.
Package korean provides Korean encodings such as EUC-KR.
Package simplifiedchinese provides Simplified Chinese encodings such as GBK.
Package simplifiedchinese provides Simplified Chinese encodings such as GBK.
Package traditionalchinese provides Traditional Chinese encodings such as Big5.
Package traditionalchinese provides Traditional Chinese encodings such as Big5.
Package unicode provides Unicode encodings such as UTF-16.
Package unicode provides Unicode encodings such as UTF-16.
Package internal contains code that is shared among encoding implementations.
Package internal contains code that is shared among encoding implementations.
identifier
Package identifier defines the contract between implementations of Encoding and Index by defining identifiers that uniquely identify standardized coded character sets (CCS) and character encoding schemes (CES), which we will together refer to as encodings, for which Encoding implementations provide converters to and from UTF-8.
Package identifier defines the contract between implementations of Encoding and Index by defining identifiers that uniquely identify standardized coded character sets (CCS) and character encoding schemes (CES), which we will together refer to as encodings, for which Encoding implementations provide converters to and from UTF-8.

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