util

package
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 Go to latest Published: Jul 8, 2026 License: MIT Imports: 12 Imported by: 0

Documentation

Overview

Code generated by _tools; DO NOT EDIT.

Code generated by _tools; DO NOT EDIT.

Package util provides utility functions for the goldmark.

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func BytesToReadOnlyString 

func BytesToReadOnlyString(b []byte) string

BytesToReadOnlyString returns a string converted from given bytes.

func DoFullUnicodeCaseFolding 

func DoFullUnicodeCaseFolding(v []byte) []byte

DoFullUnicodeCaseFolding performs full unicode case folding to given bytes.

func EastAsianWidth 

func EastAsianWidth(r rune) string

EastAsianWidth returns the east asian width of the given rune. See https://www.unicode.org/reports/tr11/tr11-36.html

func EscapeHTML 

func EscapeHTML(v []byte) []byte

EscapeHTML escapes characters that should be escaped in HTML text.

func EscapeHTMLByte 

func EscapeHTMLByte(b byte) []byte

EscapeHTMLByte returns HTML escaped bytes if the given byte should be escaped, otherwise nil.

func FirstNonSpacePosition 

func FirstNonSpacePosition(bs []byte) int

FirstNonSpacePosition returns a position line that is a first nonspace character.

func IndentPosition 

func IndentPosition(bs []byte, currentPos, width int) (pos, padding int)

IndentPosition searches an indent position with the given width for the given line. If the line contains tab characters, paddings may be not zero. currentPos==0 and width==2: 

position: 0    1
          [TAB]aaaa
width:    1234 5678

width=2 is in the tab character. In this case, IndentPosition returns (pos=1, padding=2).

func IndentPositionPadding 

func IndentPositionPadding(bs []byte, currentPos, paddingv, width int) (pos, padding int)

IndentPositionPadding searches an indent position with the given width for the given line. This function is mostly same as IndentPosition except this function takes account into additional paddings.

func IndentWidth 

func IndentWidth(bs []byte, currentPos int) (width, pos int)

IndentWidth calculate an indent width for the given line.

func IsAlphaNumeric 

func IsAlphaNumeric(c byte) bool

IsAlphaNumeric returns true if the given character is a alphabet or a numeric, otherwise false.

func IsBlank 

func IsBlank(bs []byte) bool

IsBlank returns true if the given string is all space characters.

func IsEastAsianWideRune 

func IsEastAsianWideRune(r rune) bool

IsEastAsianWideRune returns true if the given rune is an east asian wide character, otherwise false.

func IsHexDecimal 

func IsHexDecimal(c byte) bool

IsHexDecimal returns true if the given character is a hexdecimal, otherwise false.

func IsNumeric 

func IsNumeric(c byte) bool

IsNumeric returns true if the given character is a numeric, otherwise false.

func IsPunct 

func IsPunct(c byte) bool

IsPunct returns true if the given character is a punctuation, otherwise false.

func IsPunctRune 

func IsPunctRune(r rune) bool

IsPunctRune returns true if the given rune is a punctuation, otherwise false.

func IsSpace 

func IsSpace(c byte) bool

IsSpace returns true if the given character is a space, otherwise false.

func IsSpaceDiscardingUnicodeRune 

func IsSpaceDiscardingUnicodeRune(r rune) bool

IsSpaceDiscardingUnicodeRune returns true if the given rune is space-discarding unicode character, otherwise false. See https://www.w3.org/TR/2020/WD-css-text-3-20200429/#space-discard-set

func IsSpaceRune 

func IsSpaceRune(r rune) bool

IsSpaceRune returns true if the given rune is a space, otherwise false.

func ReadWhile 

func ReadWhile(source []byte, index [2]int, pred func(byte) bool) (int, bool)

ReadWhile read the given source while pred is true.

func ReplaceSpaces 

func ReplaceSpaces(source []byte, repl byte) []byte

ReplaceSpaces replaces sequence of spaces with the given repl.

func ResolveEntityNames 

func ResolveEntityNames(source []byte) []byte

ResolveEntityNames resolve entity references like 'ö" .

func ResolveNumericReferences 

func ResolveNumericReferences(source []byte) []byte

ResolveNumericReferences resolve numeric references like 'Ӓ" .

func StringToReadOnlyBytes 

func StringToReadOnlyBytes(s string) []byte

StringToReadOnlyBytes returns bytes converted from given string.

func TabWidth 

func TabWidth(currentPos int) int

TabWidth calculates actual width of a tab at the given position.

func ToLinkReference 

func ToLinkReference(v []byte) string

ToLinkReference converts given bytes into a valid link reference string. ToLinkReference performs unicode case folding, trims leading and trailing spaces, converts into lower case and replace spaces with a single space character.

func ToRune 

func ToRune(source []byte, pos int) rune

ToRune decode given bytes start at pos and returns a rune.

func ToValidRune 

func ToValidRune(v rune) rune

ToValidRune returns 0xFFFD if the given rune is invalid, otherwise v.

func TrimLeft 

func TrimLeft(source, b []byte) []byte

TrimLeft trims characters in the given s from head of the source. bytes.TrimLeft offers same functionalities, but bytes.TrimLeft allocates new buffer for the result.

func TrimLeftLength 

func TrimLeftLength(source, s []byte) int

TrimLeftLength returns a length of leading specified characters.

func TrimLeftSpace 

func TrimLeftSpace(source []byte) []byte

TrimLeftSpace returns a subslice of the given string by slicing off all leading space characters.

func TrimLeftSpaceLength 

func TrimLeftSpaceLength(source []byte) int

TrimLeftSpaceLength returns a length of leading space characters.

func TrimRight 

func TrimRight(source, b []byte) []byte

TrimRight trims characters in the given s from tail of the source.

func TrimRightLength 

func TrimRightLength(source, s []byte) int

TrimRightLength returns a length of trailing specified characters.

func TrimRightSpace 

func TrimRightSpace(source []byte) []byte

TrimRightSpace returns a subslice of the given string by slicing off all trailing space characters.

func TrimRightSpaceLength 

func TrimRightSpaceLength(source []byte) int

TrimRightSpaceLength returns a length of trailing space characters.

func URLEscape 

func URLEscape(v []byte, resolveReference bool) []byte

URLEscape escape the given URL. If resolveReference is set true:

  1. unescape punctuations
  2. resolve numeric references
  3. resolve entity references

URL encoded values (%xx) are kept as is.

func UTF8Len 

func UTF8Len(b byte) int8

UTF8Len returns a byte length of the utf-8 character.

func UnescapePunctuations 

func UnescapePunctuations(source []byte) []byte

UnescapePunctuations unescapes blackslash escaped punctuations.

func VisualizeSpaces 

func VisualizeSpaces(bs []byte) []byte

VisualizeSpaces visualize invisible space characters.

Types

type BufWriter 

type BufWriter interface {
	io.Writer
	WriteByte(c byte) error
	WriteRune(r rune) (size int, err error)
	WriteString(s string) (int, error)
	Flush() error
}

A BufWriter is a subset of the bufio.Writer .

type BytesFilter 

type BytesFilter interface {
	// Add adds given bytes to this set.
	Add([]byte)

	// Contains return true if this set contains given bytes, otherwise false.
	Contains([]byte) bool

	// Extend copies this filter and adds given bytes to new filter.
	Extend(...[]byte) BytesFilter

	// ExtendString copies this filter and adds given bytes to new filter.
	// Given string must be separated by a comma.
	ExtendString(string) BytesFilter
}

BytesFilter is a efficient data structure for checking whether bytes exist or not. BytesFilter is thread-safe.

func NewBytesFilter 

func NewBytesFilter(elements ...[]byte) BytesFilter

NewBytesFilter returns a new BytesFilter.

func NewBytesFilterString 

func NewBytesFilterString(elements string) BytesFilter

NewBytesFilterString returns a new BytesFilter. Given string must be separated by a comma.

type CopyOnWriteBuffer 

type CopyOnWriteBuffer struct {
	// contains filtered or unexported fields
}

A CopyOnWriteBuffer is a byte buffer that copies buffer when it need to be changed.

func NewCopyOnWriteBuffer 

func NewCopyOnWriteBuffer(buffer []byte) CopyOnWriteBuffer

NewCopyOnWriteBuffer returns a new CopyOnWriteBuffer.

func (*CopyOnWriteBuffer) Append 

func (b *CopyOnWriteBuffer) Append(value []byte)

Append appends given bytes to the buffer. Append copy buffer at the first time.

func (*CopyOnWriteBuffer) AppendByte 

func (b *CopyOnWriteBuffer) AppendByte(c byte)

AppendByte appends given bytes to the buffer. AppendByte copy buffer at the first time.

func (*CopyOnWriteBuffer) AppendString 

func (b *CopyOnWriteBuffer) AppendString(value string)

AppendString appends given string to the buffer. AppendString copy buffer at the first time.

func (*CopyOnWriteBuffer) Bytes 

func (b *CopyOnWriteBuffer) Bytes() []byte

Bytes returns bytes of this buffer.

func (*CopyOnWriteBuffer) IsCopied 

func (b *CopyOnWriteBuffer) IsCopied() bool

IsCopied returns true if buffer has been copied, otherwise false.

func (*CopyOnWriteBuffer) Write 

func (b *CopyOnWriteBuffer) Write(value []byte)

Write writes given bytes to the buffer. Write allocate new buffer and clears it at the first time.

func (*CopyOnWriteBuffer) WriteByte 

func (b *CopyOnWriteBuffer) WriteByte(c byte) error

WriteByte writes the given byte to the buffer. WriteByte allocate new buffer and clears it at the first time.

func (*CopyOnWriteBuffer) WriteString 

func (b *CopyOnWriteBuffer) WriteString(value string)

WriteString writes given string to the buffer. WriteString allocate new buffer and clears it at the first time.

type ErrorBufWriter 

type ErrorBufWriter interface {
	BufWriter

	// Error returns the first error that occurred in any of its methods, or nil if no error occurred.
	Error() error
}

ErrorBufWriter is a BufWriter that can return the first error that occurred in any of its methods.

func NewErrorBufWriter 

func NewErrorBufWriter(w io.Writer) ErrorBufWriter

NewErrorBufWriter returns a new ErrorBufWriter.

func NewErrorBufWriterSize 

func NewErrorBufWriterSize(w io.Writer, size int) ErrorBufWriter

NewErrorBufWriterSize returns a new ErrorBufWriter with the given buffer size.

type HTML5Entity 

type HTML5Entity struct {
	Name       string
	Characters []byte
}

HTML5Entity struct represents HTML5 entitites.

func LookUpHTML5EntityByName 

func LookUpHTML5EntityByName(name string) (*HTML5Entity, bool)

LookUpHTML5EntityByName returns (an HTML5Entity, true) if an entity named given name is found, otherwise (nil, false).

type PrioritizedValue 

type PrioritizedValue[T any] struct {
	// Value is an arbitrary value that you want to prioritize.
	Value T
	// Priority is a priority of the value.
	Priority int
}

A PrioritizedValue struct holds pair of an arbitrary value and a priority.

func Prioritized 

func Prioritized[T any](v T, priority int) PrioritizedValue[T]

Prioritized returns a new PrioritizedValue.

type PrioritizedValues 

type PrioritizedValues[T comparable] []PrioritizedValue[T]

PrioritizedValues is a slice of the PrioritizedValues.

func (PrioritizedValues[T]) Remove 

func (s PrioritizedValues[T]) Remove(v T) PrioritizedValues[T]

Remove removes the given value from this slice.

func (PrioritizedValues[T]) Sort 

func (s PrioritizedValues[T]) Sort()

Sort sorts the PrioritizedValues in ascending order.

Source Files

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