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stringparams.go
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stringparams.go
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//
// Copyright 2020-2022 Sean C Foley
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
package ipaddr
import (
"strings"
"github.com/seancfoley/ipaddress-go/ipaddr/addrerr"
"github.com/seancfoley/ipaddress-go/ipaddr/addrstr"
)
// Note: For IPv6, translation from options to params is more complicated and requires the section, so it's done in IPv6AddressSection methods
func toNormalizedIPZonedString(opts addrstr.IPStringOptions, section AddressDivisionSeries, zone Zone) string {
return toIPParams(opts).toZonedString(section, zone)
}
func toNormalizedIPString(opts addrstr.IPStringOptions, section AddressDivisionSeries) string {
return toIPParams(opts).toString(section)
}
func toNormalizedZonedString(opts addrstr.StringOptions, section AddressDivisionSeries, zone Zone) string {
return toParams(opts).toZonedString(section, zone)
}
func toNormalizedString(opts addrstr.StringOptions, section AddressDivisionSeries) string {
return toParams(opts).toString(section)
}
func toIPParams(opts addrstr.IPStringOptions) *ipAddressStringParams {
return &ipAddressStringParams{
addressStringParams: addressStringParams{
radix: opts.GetRadix(),
separator: opts.GetSeparator(),
hasSep: opts.HasSeparator(),
uppercase: opts.IsUppercase(),
expandSegments: opts.IsExpandedSegments(),
wildcards: opts.GetWildcards(),
segmentStrPrefix: opts.GetSegmentStrPrefix(),
reverse: opts.IsReverse(),
addressLabel: opts.GetAddressLabel(),
zoneSeparator: opts.GetZoneSeparator(),
},
wildcardOption: opts.GetWildcardOption(),
addressSuffix: opts.GetAddressSuffix(),
}
}
func toParams(opts addrstr.StringOptions) *addressStringParams {
return &addressStringParams{
radix: opts.GetRadix(),
separator: opts.GetSeparator(),
hasSep: opts.HasSeparator(),
uppercase: opts.IsUppercase(),
expandSegments: opts.IsExpandedSegments(),
wildcards: opts.GetWildcards(),
segmentStrPrefix: opts.GetSegmentStrPrefix(),
addressLabel: opts.GetAddressLabel(),
reverse: opts.IsReverse(),
// the options don't provide a zone separator (only IPStringOptions do), so we must specify what it is
zoneSeparator: IPv6ZoneSeparatorStr,
}
}
func from(opts addrstr.IPv6StringOptions, addr *IPv6AddressSection) (res *ipv6StringParams) {
res = &ipv6StringParams{
ipAddressStringParams: ipAddressStringParams{
addressStringParams: addressStringParams{
radix: opts.GetRadix(),
separator: opts.GetSeparator(),
hasSep: opts.HasSeparator(),
uppercase: opts.IsUppercase(),
expandSegments: opts.IsExpandedSegments(),
wildcards: opts.GetWildcards(),
segmentStrPrefix: opts.GetSegmentStrPrefix(),
reverse: opts.IsReverse(),
splitDigits: opts.IsSplitDigits(),
addressLabel: opts.GetAddressLabel(),
zoneSeparator: opts.GetZoneSeparator(),
},
wildcardOption: opts.GetWildcardOption(),
addressSuffix: opts.GetAddressSuffix(),
},
}
if opts.GetCompressOptions() != nil {
compressOptions := opts.GetCompressOptions()
maxIndex, maxCount := addr.getCompressIndexAndCount(compressOptions, opts.IsMixed())
if maxCount > 0 {
res.firstCompressedSegmentIndex = maxIndex
res.nextUncompressedIndex = maxIndex + maxCount
res.hostCompressed = compressOptions.GetCompressionChoiceOptions().CompressHost() &&
addr.IsPrefixed() &&
(res.nextUncompressedIndex >
getHostSegmentIndex(addr.getNetworkPrefixLen().bitCount(), IPv6BytesPerSegment, IPv6BitsPerSegment))
}
}
return res
}
type divStringProvider interface {
getLowerStringLength(radix int) int
getUpperStringLength(radix int) int
getLowerString(radix int, uppercase bool, appendable *strings.Builder)
getLowerStringChopped(radix int, choppedDigits int, uppercase bool, appendable *strings.Builder)
getUpperString(radix int, uppercase bool, appendable *strings.Builder)
getUpperStringMasked(radix int, uppercase bool, appendable *strings.Builder)
getSplitLowerString(radix int, choppedDigits int, uppercase bool,
splitDigitSeparator byte, reverseSplitDigits bool, stringPrefix string, appendable *strings.Builder)
getSplitRangeString(rangeSeparator string, wildcard string, radix int, uppercase bool,
splitDigitSeparator byte, reverseSplitDigits bool, stringPrefix string, appendable *strings.Builder) addrerr.IncompatibleAddressError
getSplitRangeStringLength(rangeSeparator string, wildcard string, leadingZeroCount int, radix int, uppercase bool,
splitDigitSeparator byte, reverseSplitDigits bool, stringPrefix string) int
getRangeDigitCount(radix int) int
// if leadingZeroCount is -1, returns the number of leading zeros for maximum width, based on the width of the value
adjustLowerLeadingZeroCount(leadingZeroCount int, radix int) int
// if leadingZeroCount is -1, returns the number of leading zeros for maximum width, based on the width of the value
adjustUpperLeadingZeroCount(leadingZeroCount int, radix int) int
getMaxDigitCountRadix(radix int) int
// returns the default radix for textual representations of addresses (10 for IPv4, 16 for IPv6)
getDefaultTextualRadix() int // put this in divisionValues perhaps? or use addrType
// returns the number of digits for the maximum possible value of the division when using the default radix
getMaxDigitCount() int
// A simple string using just the lower value and the default radix.
getDefaultLowerString() string
// A simple string using just the lower and upper values and the default radix, separated by the default range character.
getDefaultRangeString() string
// This is the wildcard string to be used when producing the default strings with getString() or getWildcardString()
//
// Since no parameters for the string are provided, default settings are used, but they must be consistent with the address.
//
//For instance, generally the '-' is used as a range separator, but in some cases that character is used for a segment separator.
//
// Note that this only applies to "default" settings, there are additional string methods that allow you to specify these separator characters.
// Those methods must be aware of the defaults as well, to know when they can defer to the defaults and when they cannot.
getDefaultRangeSeparatorString() string
}
// Each segment params has settings to write exactly one type of IP address part string segment.
type addressSegmentParams interface {
getWildcards() addrstr.Wildcards
preferWildcards() bool
// returns -1 for as many leading zeros as needed to write the max number of characters per segment,
// or 0, 1, 2, 3 to indicate the number of leading zeros
getLeadingZeros(segmentIndex int) int
getSegmentStrPrefix() string
getRadix() int
isUppercase() bool
isSplitDigits() bool
hasSeparator() bool
getSplitDigitSeparator() byte
isReverseSplitDigits() bool
}
type addressStringParams struct {
wildcards addrstr.Wildcards
expandSegments bool //whether to expand 1 to 001 for IPv4 or 0001 for IPv6
segmentStrPrefix string //eg for inet_aton style there is 0x for hex, 0 for octal
radix int
//the segment separator and in the case of split digits, the digit separator
separator byte // default is ' '
hasSep bool // whether there is a separator at all
uppercase bool //whether to print A or a
//print the segments in reverse, and in the case of splitDigits, print the digits in reverse as well
reverse bool
//in each segment, split the digits with the separator, so that 123.456.1.1 becomes 1.2.3.4.5.6.1.1
splitDigits bool
addressLabel string
zoneSeparator string
}
func (params *addressStringParams) getWildcards() addrstr.Wildcards {
return params.wildcards
}
func (params *addressStringParams) preferWildcards() bool {
return true
}
//returns -1 to expand
func (params *addressStringParams) getLeadingZeros(_ int) int {
if params.expandSegments {
return -1
}
return 0
}
func (params *addressStringParams) getSegmentStrPrefix() string {
return params.segmentStrPrefix
}
func (params *addressStringParams) getRadix() int {
return params.radix
}
func (params *addressStringParams) isUppercase() bool {
return params.uppercase
}
func (params *addressStringParams) isSplitDigits() bool {
return params.splitDigits
}
func (params *addressStringParams) hasSeparator() bool {
return params.hasSep
}
func (params *addressStringParams) getSplitDigitSeparator() byte {
return params.separator
}
func (params *addressStringParams) isReverseSplitDigits() bool {
return params.reverse
}
func (params *addressStringParams) getSegmentsStringLength(part AddressDivisionSeries) int {
count := 0
divCount := part.GetDivisionCount()
if divCount != 0 {
for i := 0; i < divCount; i++ {
count += params.appendSegment(i, nil, part)
}
//Character separator = getSeparator();
if params.hasSep {
count += divCount - 1 // the number of separators
}
}
return count
}
func (params *addressStringParams) appendSegments(builder *strings.Builder, part AddressDivisionSeries) *strings.Builder {
divCount := part.GetDivisionCount()
if divCount != 0 {
reverse := params.reverse
i := 0
hasSeparator := params.hasSep
separator := params.separator
for {
segIndex := i
if reverse {
segIndex = divCount - i - 1
}
params.appendSegment(segIndex, builder, part)
i++
if i == divCount {
break
}
if hasSeparator {
builder.WriteByte(separator)
}
}
}
return builder
}
func (params *addressStringParams) appendSingleDivision(seg DivisionType, builder *strings.Builder) int {
writer := stringWriter{seg}
if builder == nil {
result, _ := writer.getStandardString(0, params, nil)
return result + params.getAddressLabelLength()
}
params.appendLabel(builder)
_, _ = writer.getStandardString(0, params, builder)
return 0
}
func (params *addressStringParams) getDivisionStringLength(seg DivisionType) int {
return params.appendSingleDivision(seg, nil)
}
func (params *addressStringParams) appendDivision(builder *strings.Builder, seg DivisionType) *strings.Builder {
params.appendSingleDivision(seg, builder)
return builder
}
func (params *addressStringParams) appendSegment(segmentIndex int, builder *strings.Builder, part AddressDivisionSeries) int {
div := part.GetGenericDivision(segmentIndex)
writer := stringWriter{div}
res, _ := writer.getStandardString(segmentIndex, params, builder)
return res
}
func (params *addressStringParams) getZoneLength(zone Zone, sep string) int {
if zone != NoZone {
return len(zone) + len(sep) /* zone separator is one char */
}
return 0
}
func (params *addressStringParams) getZonedStringLength(addr AddressDivisionSeries, zone Zone) int {
if addr.GetDivisionCount() > 0 {
result := params.getStringLength(addr)
if zone != NoZone {
result += params.getZoneLength(zone, params.zoneSeparator)
}
return result
}
return 0
}
func (params *addressStringParams) getStringLength(addr AddressDivisionSeries) int {
if addr.GetDivisionCount() > 0 {
return params.getAddressLabelLength() + params.getSegmentsStringLength(addr)
}
return 0
}
func (params *addressStringParams) appendZone(builder *strings.Builder, zone Zone) *strings.Builder {
if zone != NoZone {
builder.WriteString(params.zoneSeparator)
builder.WriteString(string(zone))
}
return builder
}
func (params *addressStringParams) appendZoned(builder *strings.Builder, addr AddressDivisionSeries, zone Zone) *strings.Builder {
if addr.GetDivisionCount() > 0 {
params.appendLabel(builder)
params.appendSegments(builder, addr)
params.appendZone(builder, zone)
}
return builder
}
func (params *addressStringParams) append(builder *strings.Builder, addr AddressDivisionSeries) *strings.Builder {
return params.appendZoned(builder, addr, NoZone)
}
func (params *addressStringParams) toZonedString(addr AddressDivisionSeries, zone Zone) string {
length := params.getZonedStringLength(addr, zone)
builder := &strings.Builder{}
builder.Grow(length)
params.appendZoned(builder, addr, zone)
checkLengths(length, builder)
return builder.String()
}
func (params *addressStringParams) appendLabel(builder *strings.Builder) *strings.Builder {
str := params.addressLabel
if str != "" {
builder.WriteString(str)
}
return builder
}
func (params *addressStringParams) getAddressLabelLength() int {
return len(params.addressLabel)
}
func (params *addressStringParams) toString(addr AddressDivisionSeries) string {
length := params.getStringLength(addr)
builder := &strings.Builder{}
builder.Grow(length)
params.append(builder, addr)
checkLengths(length, builder)
return builder.String()
}
//
func checkLengths(length int, builder *strings.Builder) {
//Note: re-enable this when doing development
//calcMatch := length == builder.Len()
//capMatch := length == builder.Cap()
//if !calcMatch || !capMatch {
// panic(fmt.Sprintf("length is %d, capacity is %d, expected length is %d", builder.Len(), builder.Cap(), length))
//}
}
func (params *addressStringParams) clone() *addressStringParams {
result := *params
return &result
}
var _ addressSegmentParams = &addressStringParams{}
// Each StringParams has settings to write exactly one type of IP address part string.
type ipAddressStringParams struct {
addressStringParams
wildcardOption addrstr.WildcardOption
expandSeg []int //the same as expandSegments but for each segment
addressSuffix string
}
func (params *ipAddressStringParams) preferWildcards() bool {
return params.wildcardOption == addrstr.WildcardsAll
}
func (params *ipAddressStringParams) getExpandedSegmentLength(segmentIndex int) int {
expandSegment := params.expandSeg
if expandSegment == nil || len(expandSegment) <= segmentIndex {
return 0
}
return expandSegment[segmentIndex]
}
func (params *ipAddressStringParams) expandSegment(index, expansionLength, segmentCount int) {
expandSegment := params.expandSeg
if expandSegment == nil {
expandSegment = make([]int, segmentCount)
params.expandSeg = expandSegment
}
expandSegment[index] = expansionLength
}
//returns -1 for MAX, or 0, 1, 2, 3 to indicate the string prefix length
func (params *ipAddressStringParams) getLeadingZeros(segmentIndex int) int {
expandSegment := params.expandSeg
if params.expandSegments {
return -1
} else if expandSegment != nil && len(expandSegment) > segmentIndex {
return expandSegment[segmentIndex]
}
return 0
}
func (params *ipAddressStringParams) getTrailingSegmentSeparator() byte {
return params.separator
}
func (params *ipAddressStringParams) appendSuffix(builder *strings.Builder) *strings.Builder {
suffix := params.addressSuffix
if len(suffix) > 0 {
builder.WriteString(suffix)
}
return builder
}
func (params *ipAddressStringParams) getAddressSuffixLength() int {
suffix := params.addressSuffix
return len(suffix)
}
func (params *ipAddressStringParams) getTrailingSeparatorCount(addr AddressDivisionSeries) int {
count := addr.GetDivisionCount()
if count > 0 {
return count - 1
}
return 0
}
func getPrefixIndicatorStringLength(addr AddressDivisionSeries) int {
if addr.IsPrefixed() {
return toUnsignedStringLengthFast(uint16(addr.GetPrefixLen().bitCount()), 10) + 1
}
return 0
}
func (params *ipAddressStringParams) getSegmentsStringLength(part AddressDivisionSeries) int {
count := 0
divCount := part.GetDivisionCount()
if divCount != 0 {
prefLen := part.GetPrefixLen()
for i := 0; i < divCount; i++ {
div := part.GetGenericDivision(i)
count += params.appendSegment(i, div, prefLen, nil, part)
if prefLen != nil {
bc := prefLen.bitCount()
dc := div.GetBitCount()
var bits BitCount
if bc > dc {
bits = bc - dc
}
prefLen = cacheBitCount(bits)
}
}
if params.hasSep {
count += divCount - 1 // the number of separators
}
}
return count
}
func (params *ipAddressStringParams) getStringLength(series AddressDivisionSeries) int {
count := params.getSegmentsStringLength(series)
if !params.reverse && !params.preferWildcards() {
count += getPrefixIndicatorStringLength(series)
}
return count + params.getAddressSuffixLength() + params.getAddressLabelLength()
}
func (params *ipAddressStringParams) appendPrefixIndicator(builder *strings.Builder, addr AddressDivisionSeries) *strings.Builder {
if addr.IsPrefixed() {
builder.WriteByte(PrefixLenSeparator)
return toUnsignedStringCased(uint64(addr.GetPrefixLen().bitCount()), 10, 0, false, builder)
}
return builder
}
func (params *ipAddressStringParams) appendSegments(builder *strings.Builder, part AddressDivisionSeries) *strings.Builder {
divCount := part.GetDivisionCount()
if divCount != 0 {
prefLen := part.GetPrefixLen()
reverse := params.reverse
i := 0
hasSeparator := params.hasSep
separator := params.separator
for {
segIndex := i
if reverse {
segIndex = divCount - i - 1
}
div := part.GetGenericDivision(segIndex)
params.appendSegment(segIndex, div, prefLen, builder, part)
if prefLen != nil {
bc := prefLen.bitCount()
dc := div.GetBitCount()
var bits BitCount
if bc > dc {
bits = bc - dc
}
prefLen = cacheBitCount(bits)
}
i++
if i == divCount {
break
}
if hasSeparator {
builder.WriteByte(separator)
}
}
}
return builder
}
func (params *ipAddressStringParams) append(builder *strings.Builder, addr AddressDivisionSeries, zone Zone) *strings.Builder {
if addr.GetDivisionCount() > 0 {
params.appendSuffix(params.appendZone(params.appendSegments(params.appendLabel(builder), addr), zone))
if !params.reverse && !params.preferWildcards() {
params.appendPrefixIndicator(builder, addr)
}
}
return builder
}
func (params *ipAddressStringParams) appendSegment(segmentIndex int, div DivisionType, divPrefixLen PrefixLen, builder *strings.Builder, part AddressDivisionSeries) int {
if params.isSplitDigits() {
panic("split digits") // split digits restricted to IPv6, because we ignore the errors generated by split digits elsewhere.
}
writer := stringWriter{div}
// consider all the cases in which we need not account for prefix length
if params.preferWildcards() ||
divPrefixLen == nil ||
divPrefixLen.bitCount() >= div.GetBitCount() ||
!part.IsPrefixBlock() /* || params.isSplitDigits() */ {
count, _ := writer.getStandardString(segmentIndex, params, builder)
return count
}
// prefix length will have an impact on the string - either we need not print the range at all
// because it is equivalent to the prefix length, or we need to adjust the upper value of the
// range so that the host is zero when printing the string
if div.IsSinglePrefix(divPrefixLen.bitCount()) {
//if div.ContainsSinglePrefixBlock(*divPrefixLen) {
//xxx ContainsSinglePrefix xxxx // this could be slightly quicker since we know it is a prefix block (since the whole part is), all we need to know is that it is single prefix. Add such a method to divStringProvider.
return writer.getLowerStandardString(segmentIndex, params, builder)
}
return writer.getPrefixAdjustedRangeString(segmentIndex, params, builder)
}
func (params *ipAddressStringParams) getZonedStringLength(addr AddressDivisionSeries, zone Zone) int {
if addr.GetDivisionCount() > 0 {
result := params.getStringLength(addr)
if zone != NoZone {
result += params.getZoneLength(zone, params.zoneSeparator)
}
return result
}
return 0
}
func (params *ipAddressStringParams) toZonedString(series AddressDivisionSeries, zone Zone) string {
length := params.getZonedStringLength(series, zone)
builder := strings.Builder{}
builder.Grow(length)
params.append(&builder, series, zone)
checkLengths(length, &builder)
return builder.String()
}
func (params *ipAddressStringParams) toString(series AddressDivisionSeries) string {
return params.toZonedString(series, NoZone)
}
func (params *ipAddressStringParams) clone() *ipAddressStringParams {
result := *params
expandSegment := params.expandSeg
if expandSegment != nil {
result.expandSeg = cloneInts(expandSegment)
}
return &result
}
// Each IPv6StringParams has settings to write exactly one IPv6 address section string
type ipv6StringParams struct {
ipAddressStringParams
firstCompressedSegmentIndex, nextUncompressedIndex int //the start and end of any compressed section
hostCompressed bool //whether the host was compressed, which with some prefix configurations means we must print the network prefix to indicate that the host is full range
}
func (params *ipv6StringParams) endIsCompressed(addr IPAddressSegmentSeries) bool {
return params.nextUncompressedIndex >= addr.GetDivisionCount()
}
func (params *ipv6StringParams) isCompressed(_ IPAddressSegmentSeries) bool {
return params.firstCompressedSegmentIndex >= 0
}
func (params *ipv6StringParams) getTrailingSeparatorCount(addr *IPv6AddressSection) int {
return params.getTrailingSepCount(addr)
}
func (params *ipv6StringParams) getTrailingSepCount(addr IPAddressSegmentSeries) int {
divisionCount := addr.GetDivisionCount()
if divisionCount == 0 {
return 0
}
count := divisionCount - 1 //separators with no compression
if params.isCompressed(addr) {
firstCompressedSegmentIndex := params.firstCompressedSegmentIndex
nextUncompressedIndex := params.nextUncompressedIndex
count -= (nextUncompressedIndex - firstCompressedSegmentIndex) - 1 //missing seps
if firstCompressedSegmentIndex == 0 /* additional separator at front */ ||
nextUncompressedIndex >= divisionCount /* additional separator at end */ {
count++
}
}
return count
}
func (params *ipv6StringParams) append(builder *strings.Builder, addr *IPv6AddressSection, zone Zone) (err addrerr.IncompatibleAddressError) {
if addr.GetDivisionCount() > 0 {
// Our order is label, then segments, then zone, then suffix, then prefix length.
err = params.appendSegments(params.appendLabel(builder), addr)
if err != nil {
return
}
params.appendSuffix(params.appendZone(builder, zone))
if !params.reverse && (!params.preferWildcards() || params.hostCompressed) {
params.appendPrefixIndicator(builder, addr)
}
}
return
}
func (params *ipv6StringParams) appendSegment(segmentIndex int, div DivisionType, divPrefixLen PrefixLen, builder *strings.Builder, part AddressDivisionSeries) (count int, err addrerr.IncompatibleAddressError) {
if params.isSplitDigits() {
writer := stringWriter{div}
count, err = writer.getStandardString(segmentIndex, params, builder)
return
}
count = params.ipAddressStringParams.appendSegment(segmentIndex, div, divPrefixLen, builder, part)
return
}
func (params *ipv6StringParams) appendSegments(builder *strings.Builder, addr IPv6AddressSegmentSeries) (err addrerr.IncompatibleAddressError) {
divisionCount := addr.GetDivisionCount()
if divisionCount <= 0 {
return nil
}
lastIndex := divisionCount - 1
separator := params.separator
reverse := params.reverse
i := 0
firstCompressedSegmentIndex := params.firstCompressedSegmentIndex
nextUncompressedIndex := params.nextUncompressedIndex
hasSep := params.hasSeparator()
for {
segIndex := i
if reverse {
segIndex = lastIndex - i
}
if segIndex < firstCompressedSegmentIndex || segIndex >= nextUncompressedIndex {
div := addr.GetSegment(segIndex)
prefLen := div.getDivisionPrefixLength() // Needs to be DivisionType
_, err = params.appendSegment(segIndex, div, prefLen, builder, addr)
i++
if i > lastIndex {
break
}
if hasSep {
builder.WriteByte(separator)
}
} else {
firstCompressed := firstCompressedSegmentIndex
if reverse {
firstCompressed = nextUncompressedIndex - 1
}
if segIndex == firstCompressed && hasSep { //the segment is compressed
builder.WriteByte(separator)
if i == 0 { //when compressing the front we use two separators
builder.WriteByte(separator)
}
} //else we are in the middle of a compressed set of segments, so nothing to write
i++
if i > lastIndex {
break
}
}
}
return
}
func (params *ipv6StringParams) getSegmentsStringLength(part IPv6AddressSegmentSeries) int {
count := 0
divCount := part.GetDivisionCount()
if divCount != 0 {
i := 0
firstCompressedSegmentIndex := params.firstCompressedSegmentIndex
nextUncompressedIndex := params.nextUncompressedIndex
for {
if i < firstCompressedSegmentIndex || i >= nextUncompressedIndex {
div := part.GetSegment(i)
prefLen := div.GetSegmentPrefixLen()
additionalCount, _ := params.appendSegment(i, div, prefLen, nil, part)
count += additionalCount
i++
if i >= divCount {
break
}
if params.hasSeparator() {
count++
}
} else {
if i == firstCompressedSegmentIndex && params.hasSeparator() { //the segment is compressed
count++
if i == 0 { //when compressing the front we use two separators
count++
}
} //else we are in the middle of a compressed set of segments, so nothing to write
i++
if i >= divCount {
break
}
}
}
}
return count
}
func (params *ipv6StringParams) getStringLength(addr *IPv6AddressSection) int {
count := params.getSegmentsStringLength(addr)
if !params.reverse && (!params.preferWildcards() || params.hostCompressed) {
count += getPrefixIndicatorStringLength(addr)
}
return count + params.getAddressSuffixLength() + params.getAddressLabelLength()
}
func (params *ipv6StringParams) getZonedStringLength(addr *IPv6AddressSection, zone Zone) int {
if addr.GetDivisionCount() > 0 {
result := params.getStringLength(addr)
if zone != NoZone {
result += params.getZoneLength(zone, params.zoneSeparator)
}
return result
}
return 0
}
func (params *ipv6StringParams) toZonedSplitString(addr *IPv6AddressSection, zone Zone) (str string, err addrerr.IncompatibleAddressError) {
length := params.getZonedStringLength(addr, zone)
builder := strings.Builder{}
builder.Grow(length)
if err = params.append(&builder, addr, zone); err != nil {
return
}
checkLengths(length, &builder)
str = builder.String()
return
}
func (params *ipv6StringParams) toZonedString(addr *IPv6AddressSection, zone Zone) string {
length := params.getZonedStringLength(addr, zone)
builder := strings.Builder{}
builder.Grow(length)
_ = params.append(&builder, addr, zone) // only split strings produce errors
checkLengths(length, &builder)
return builder.String()
}
func (params *ipv6StringParams) toString(addr *IPv6AddressSection) string {
return params.toZonedString(addr, NoZone)
}
func (params *ipv6StringParams) clone() *ipv6StringParams {
res := *params
res.ipAddressStringParams = *res.ipAddressStringParams.clone()
return &res
}
// Each IPv6StringParams has settings to write exactly one IPv6 address section string
type ipv6v4MixedParams struct {
ipv6Params *ipv6StringParams
ipv4Params *ipAddressStringParams
}
func (params *ipv6v4MixedParams) getTrailingSegmentSeparator() byte {
return params.ipv4Params.getTrailingSegmentSeparator()
}
func (params *ipv6v4MixedParams) getTrailingSeparatorCount(addr *IPv6v4MixedAddressGrouping) int {
return params.ipv4Params.getTrailingSeparatorCount(addr.GetIPv4AddressSection())
}
func (params *ipv6v4MixedParams) getStringLength(addr *IPv6v4MixedAddressGrouping, zone Zone) int {
if addr.GetDivisionCount() > 0 {
ipv6Params := params.ipv6Params
ipv6length := ipv6Params.getSegmentsStringLength(addr.GetIPv6AddressSection())
ipv4length := params.ipv4Params.getSegmentsStringLength(addr.GetIPv4AddressSection())
length := ipv6length + ipv4length
if ipv6Params.nextUncompressedIndex < addr.GetIPv6AddressSection().GetSegmentCount() {
length++
}
length += params.getPrefixStringLength(addr)
length += ipv6Params.getZoneLength(zone, ipv6Params.zoneSeparator)
length += ipv6Params.getAddressSuffixLength()
length += ipv6Params.getAddressLabelLength()
return length
}
return 0
}
func (params *ipv6v4MixedParams) toString(addr *IPv6v4MixedAddressGrouping) string {
return params.toZonedString(addr, NoZone)
}
func (params *ipv6v4MixedParams) toZonedString(addr *IPv6v4MixedAddressGrouping, zone Zone) string {
length := params.getStringLength(addr, zone)
builder := &strings.Builder{}
builder.Grow(length)
params.append(builder, addr, zone)
checkLengths(length, builder)
return builder.String()
}
func (params *ipv6v4MixedParams) getDivisionStringLength(seg *AddressDivision) int {
return params.ipv6Params.getDivisionStringLength(seg)
}
func (params *ipv6v4MixedParams) appendDivision(builder *strings.Builder, seg *AddressDivision) *strings.Builder {
return params.ipv6Params.appendDivision(builder, seg)
}
func (params *ipv6v4MixedParams) append(builder *strings.Builder, addr *IPv6v4MixedAddressGrouping, zone Zone) *strings.Builder {
if addr.GetDivisionCount() > 0 {
ipv6Params := params.ipv6Params
ipv6Params.appendLabel(builder)
_ = ipv6Params.appendSegments(builder, addr.GetIPv6AddressSection())
if ipv6Params.nextUncompressedIndex < addr.GetIPv6AddressSection().GetSegmentCount() {
builder.WriteByte(ipv6Params.getTrailingSegmentSeparator())
}
params.ipv4Params.appendSegments(builder, addr.GetIPv4AddressSection())
/*
* RFC 4038: for bracketed addresses, zone is inside and prefix outside, putting prefix after zone.
*
* Suffixes are things like .in-addr.arpa, .ip6.arpa, .ipv6-literal.net
* which generally convert an address string to a host
* As with our HostName, we support host/prefix in which case the prefix is applied
* to the resolved address.
*
* So in summary, our order is zone, then suffix, then prefix length.
*/
ipv6Params.appendZone(builder, zone)
ipv6Params.appendSuffix(builder)
params.appendPrefixIndicator(builder, addr)
}
return builder
}
func (params *ipv6v4MixedParams) getPrefixStringLength(addr *IPv6v4MixedAddressGrouping) int {
if params.requiresPrefixIndicatorIPv6(addr.GetIPv6AddressSection()) || params.requiresPrefixIndicatorIPv4(addr.GetIPv4AddressSection()) {
return getPrefixIndicatorStringLength(addr)
}
return 0
}
func (params *ipv6v4MixedParams) appendPrefixIndicator(builder *strings.Builder, addr *IPv6v4MixedAddressGrouping) {
if params.requiresPrefixIndicatorIPv6(addr.GetIPv6AddressSection()) || params.requiresPrefixIndicatorIPv4(addr.GetIPv4AddressSection()) {
params.ipv6Params.appendPrefixIndicator(builder, addr)
}
}
func (params *ipv6v4MixedParams) requiresPrefixIndicatorIPv4(ipv4Section *IPv4AddressSection) bool {
return ipv4Section.IsPrefixed() && !params.ipv4Params.preferWildcards()
}
func (params *ipv6v4MixedParams) requiresPrefixIndicatorIPv6(ipv6Section IPv6AddressSegmentSeries) bool {
//func (params *ipv6v4MixedParams) requiresPrefixIndicatorIPv6(ipv6Section *IPv6AddressSection) bool {
ipv6Params := params.ipv6Params
return ipv6Section.IsPrefixed() && (!ipv6Params.preferWildcards() || ipv6Params.hostCompressed)
}
func (params *ipv6v4MixedParams) clone() *ipv6v4MixedParams {
ipv6Params := *params.ipv6Params
ipv4Params := *params.ipv4Params
return &ipv6v4MixedParams{
ipv6Params: &ipv6Params,
ipv4Params: &ipv4Params,
}
}
type stringWriter struct {
DivisionType
}
// Produces a string to represent the segment, using wildcards and range characters.
// Use this instead of getWildcardString() if you have a customized wildcard or range separator or you have a non-zero leadingZeroCount,
func (writer stringWriter) getStandardString(segmentIndex int, params addressSegmentParams, appendable *strings.Builder) (digitCount int, err addrerr.IncompatibleAddressError) {
//div := writer.div
if !writer.IsMultiple() {
splitDigits := params.isSplitDigits()
if splitDigits {
radix := params.getRadix()
leadingZeroCount := params.getLeadingZeros(segmentIndex)
leadingZeroCount = writer.adjustLowerLeadingZeroCount(leadingZeroCount, radix)
stringPrefix := params.getSegmentStrPrefix()
prefLen := len(stringPrefix)
if appendable == nil {
var length int
if leadingZeroCount != 0 {
if leadingZeroCount < 0 {
length = writer.getMaxDigitCountRadix(radix)
} else {
length = writer.getLowerStringLength(radix) + leadingZeroCount
}
} else {
length = writer.getLowerStringLength(radix)
}
count := (length << 1) - 1
if prefLen > 0 {
count += length * prefLen
}
return count, nil
} else {
var splitDigitSeparator byte = ' '
if params.hasSeparator() {
splitDigitSeparator = params.getSplitDigitSeparator()
}
reverseSplitDigits := params.isReverseSplitDigits()
uppercase := params.isUppercase()
if reverseSplitDigits {
writer.getSplitLowerString(radix, 0, uppercase, splitDigitSeparator, reverseSplitDigits, stringPrefix, appendable)
if leadingZeroCount != 0 {
appendable.WriteByte(splitDigitSeparator)
getSplitLeadingZeros(leadingZeroCount, splitDigitSeparator, stringPrefix, appendable)
}
} else {
if leadingZeroCount != 0 {
getSplitLeadingZeros(leadingZeroCount, splitDigitSeparator, stringPrefix, appendable)
appendable.WriteByte(splitDigitSeparator)
}
writer.getSplitLowerString(radix, 0, uppercase, splitDigitSeparator, reverseSplitDigits, stringPrefix, appendable)
}
return