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Kotlin Common Standard Library
/*
* Copyright 2010-2023 JetBrains s.r.o. and Kotlin Programming Language contributors.
* Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
*/
package kotlin.text
import kotlin.internal.InlineOnly
/**
* Represents hexadecimal format options for formatting and parsing byte arrays and integer numeric values,
* both signed and unsigned.
*
* An instance of this class is passed to formatting and parsing functions and specifies how formatting and parsing
* should be conducted. The options of the [bytes] property apply only when formatting and parsing byte arrays,
* while the [number] property applies when formatting and parsing numeric values. The [upperCase] option affects both.
*
* This class is immutable and cannot be created or configured directly. To create a new format, use the
* `HexFormat { }` builder function and configure the options inside the braces. For example, use
* `val format = HexFormat { upperCase = true }` to enable upper-case formatting.
*
* Two predefined instances are provided by this class's companion object: [Default] and [UpperCase].
* The [Default] instance has the [upperCase] option set to `false`, and the options of [bytes] and [number] properties
* set to their default values as specified in [BytesHexFormat] and [NumberHexFormat], respectively.
* The [UpperCase] instance has the [upperCase] option set to `true`, and the options of [bytes] and [number] properties
* set to their default values.
*
* @sample samples.text.HexFormats.HexFormatClass.hexFormatBuilderFunction
*
* @see ByteArray.toHexString
* @see String.hexToByteArray
* @see Int.toHexString
* @see String.hexToInt
*/
@ExperimentalStdlibApi
@SinceKotlin("1.9")
public class HexFormat internal constructor(
/**
* Specifies whether upper-case hexadecimal digits should be used for formatting, `false` by default.
*
* When this option is set to `true`, formatting functions will use upper-case hexadecimal digits (`0-9`, `A-F`)
* to create the hexadecimal representation of the values being formatted. Otherwise, lower-case hexadecimal digits
* (`0-9`, `a-f`) will be used.
*
* This option affects the formatting results for both byte arrays and numeric values. However, it **has no effect
* on parsing**, which is always performed in a case-insensitive manner.
*
* Note: This option **affects only the case of hexadecimal digits** and does not influence other elements like
* [BytesHexFormat.bytePrefix] or [NumberHexFormat.suffix].
*
* @sample samples.text.HexFormats.HexFormatClass.upperCase
*/
public val upperCase: Boolean,
/**
* Specifies the hexadecimal format used for formatting and parsing byte arrays.
*
* This property defines how byte arrays are formatted into hexadecimal strings and parsed back from strings into
* byte arrays. It is utilized by [ByteArray.toHexString] for formatting and [String.hexToByteArray] for parsing.
* These functions are available for [UByteArray] as well.
*
* Refer to [BytesHexFormat] for details about the available format options, their impact on formatting and
* parsing results, and their default settings.
*/
public val bytes: BytesHexFormat,
/**
* Specifies the hexadecimal format used for formatting and parsing numeric values.
*
* This property defines how numeric values are formatted into hexadecimal strings and parsed back from strings
* into numeric values. It is utilized by functions like [Int.toHexString] for formatting and [String.hexToInt] for
* parsing. These functions are available for all integer numeric types.
*
* Refer to [NumberHexFormat] for details about the available format options, their impact on formatting and
* parsing results, and their default settings.
*/
public val number: NumberHexFormat
) {
override fun toString(): String = buildString {
append("HexFormat(").appendLine()
append(" upperCase = ").append(upperCase).appendLine(",")
append(" bytes = BytesHexFormat(").appendLine()
bytes.appendOptionsTo(this, indent = " ").appendLine()
append(" ),").appendLine()
append(" number = NumberHexFormat(").appendLine()
number.appendOptionsTo(this, indent = " ").appendLine()
append(" )").appendLine()
append(")")
}
/**
* Represents hexadecimal format options for formatting and parsing byte arrays.
*
* These options are utilized by [ByteArray.toHexString] and [String.hexToByteArray] functions for formatting and
* parsing, respectively. The formatting and parsing functions are available for [UByteArray] as well.
*
* When formatting a byte array, one can assume the following steps:
* 1. The bytes are split into lines with [bytesPerLine] bytes in each line,
* except for the last line, which may have fewer bytes.
* 2. Each line is split into groups with [bytesPerGroup] bytes in each group,
* except for the last group in a line, which may have fewer bytes.
* 3. All bytes are converted to their two-digit hexadecimal representation,
* each prefixed by [bytePrefix] and suffixed by [byteSuffix].
* 4. Adjacent formatted bytes within each group are separated by [byteSeparator].
* 5. Adjacent groups within each line are separated by [groupSeparator].
* 6. Adjacent lines are separated by the line feed (LF) character `'\n'`.
*
* For example, consider the snippet below:
* ```kotlin
* val byteArray = byteArrayOf(0, 1, 2, 3, 4, 5, 6, 7)
* val format = HexFormat {
* bytes {
* bytesPerLine = 6
* bytesPerGroup = 4
* groupSeparator = "|" // vertical bar
* byteSeparator = " " // one space
* bytePrefix = "0x"
* byteSuffix = "" // empty string
* }
* }
*
* println(byteArray.toHexString(format))
* ```
* Given the `byteArray` and `format`, the formatting proceeds as follows:
* 1. The 8 bytes are split into lines of 6 bytes each. The first line contains `0, 1, 2, 3, 4, 5`,
* and the second (and last) line contains `6, 7`.
* 2. Each line is then divided into groups of 4 bytes. The first line forms two groups: `0, 1, 2, 3` and `4, 5`;
* the second line forms one group: `6, 7`.
* 3. Each byte is converted to its hexadecimal representation, prefixed by `"0x"` and suffixed by an empty string.
* 4. Bytes within each group are separated by a single space `" "`.
* 5. Groups within each line are separated by a vertical bar character `"|"`.
* 6. Lines are separated by the LF character `'\n'`.
*
* The `byteArray.toHexString(format)` call will result in `"0x00 0x01 0x02 0x03|0x04 0x05\n0x06 0x07"`,
* and printing it to the console outputs:
* ```
* 0x00 0x01 0x02 0x03|0x04 0x05
* 0x06 0x07
* ```
*
* When parsing, the input string must conform to the format specified by these options.
* However, parsing is somewhat lenient, allowing any of the char sequences CRLF, LF, or CR to be used as the line
* separator. Additionally, parsing of [groupSeparator], [byteSeparator], [bytePrefix], [byteSuffix], and the
* hexadecimal digits is performed in a case-insensitive manner.
*
* This class is immutable and cannot be created or configured directly. To create a new format, use the
* `HexFormat { }` builder function and configure the options of the `bytes` property inside the braces. For example,
* use `val format = HexFormat { bytes.bytesPerLine = 16 }` to set the [bytesPerLine]. The `bytes` property is of
* type [BytesHexFormat.Builder], whose options are configurable and correspond to the options of this class.
*/
public class BytesHexFormat internal constructor(
/**
* The maximum number of bytes per line, [Int.MAX_VALUE] by default.
*
* When formatting, bytes are split into lines with [bytesPerLine] bytes in each line, except for the last
* line, which may have fewer bytes if the total number of bytes does not divide evenly by this value. Adjacent
* lines are separated by the line feed (LF) character `'\n'`. Note that if this value is greater than or equal
* to the size of the byte array, the entire array will be formatted as a single line without any line breaks.
*
* When parsing, the input string must be split into lines accordingly, with [bytesPerLine] bytes in each line,
* except for the last line, which may have fewer bytes. Any of the char sequences CRLF, LF, or CR
* is considered a valid line separator.
*
* @sample samples.text.HexFormats.ByteArrays.bytesPerLine
*/
public val bytesPerLine: Int,
/**
* The maximum number of bytes per group in a line, [Int.MAX_VALUE] by default.
*
* The number of bytes in each line is determined by the [bytesPerLine] option.
*
* When formatting, each line is split into groups with [bytesPerGroup] bytes in each group, except for the
* last group in a line, which may have fewer bytes if the number of bytes in the line does not divide evenly
* by this value. Adjacent groups within each line are separated by [groupSeparator]. Note that if this value
* is greater than or equal to the number of bytes in a line, the bytes are not split into groups.
*
* When parsing, each line in the input string must be split into groups of [bytesPerGroup] bytes, except for
* the last group in a line, which may have fewer bytes. Adjacent groups within each line must be separated by
* [groupSeparator]. The parsing of the separator is performed in a case-insensitive manner.
*
* @sample samples.text.HexFormats.ByteArrays.bytesPerGroup
*/
public val bytesPerGroup: Int,
/**
* The string used to separate adjacent groups in a line, two space characters (`" "`) by default.
*
* The number of bytes in each line and each group is determined by the [bytesPerLine] and
* [bytesPerGroup] options, respectively.
*
* When formatting, adjacent groups within each line are separated by this string.
*
* When parsing, adjacent groups within each line must be separated by this string.
* The parsing of this separator is performed in a case-insensitive manner.
*
* @sample samples.text.HexFormats.ByteArrays.bytesPerGroup
*/
public val groupSeparator: String,
/**
* The string used to separate adjacent bytes within a group.
*
* The number of bytes in each group is determined by the [bytesPerGroup] option.
*
* When formatting, adjacent bytes within each group are separated by this string.
*
* When parsing, adjacent bytes within each group must be separated by this string
* The parsing of this separator is performed in a case-insensitive manner.
*
* @sample samples.text.HexFormats.ByteArrays.byteSeparator
*/
public val byteSeparator: String,
/**
* The string that immediately precedes the two-digit hexadecimal representation of each byte.
*
* When formatting, this string is used as a prefix for the hexadecimal representation of each byte.
*
* When parsing, the hexadecimal representation of each byte must be prefixed by this string.
* The parsing of this prefix is performed in a case-insensitive manner.
*
* @sample samples.text.HexFormats.ByteArrays.bytePrefix
*/
public val bytePrefix: String,
/**
* The string that immediately follows the two-digit hexadecimal representation of each byte.
*
* When formatting, this string is used as a suffix for the hexadecimal representation of each byte.
*
* When parsing, the hexadecimal representation of each byte must be suffixed by this string.
* The parsing of this suffix is performed in a case-insensitive manner.
*
* @sample samples.text.HexFormats.ByteArrays.byteSuffix
*/
public val byteSuffix: String
) {
internal val noLineAndGroupSeparator: Boolean =
bytesPerLine == Int.MAX_VALUE && bytesPerGroup == Int.MAX_VALUE
internal val shortByteSeparatorNoPrefixAndSuffix: Boolean =
bytePrefix.isEmpty() && byteSuffix.isEmpty() && byteSeparator.length <= 1
/**
* Whether to ignore case when parsing format strings.
* If false, case-sensitive parsing is conducted, which is faster.
*/
internal val ignoreCase: Boolean =
groupSeparator.isCaseSensitive() ||
byteSeparator.isCaseSensitive() ||
bytePrefix.isCaseSensitive() ||
byteSuffix.isCaseSensitive()
override fun toString(): String = buildString {
append("BytesHexFormat(").appendLine()
appendOptionsTo(this, indent = " ").appendLine()
append(")")
}
internal fun appendOptionsTo(sb: StringBuilder, indent: String): StringBuilder {
sb.append(indent).append("bytesPerLine = ").append(bytesPerLine).appendLine(",")
sb.append(indent).append("bytesPerGroup = ").append(bytesPerGroup).appendLine(",")
sb.append(indent).append("groupSeparator = \"").append(groupSeparator).appendLine("\",")
sb.append(indent).append("byteSeparator = \"").append(byteSeparator).appendLine("\",")
sb.append(indent).append("bytePrefix = \"").append(bytePrefix).appendLine("\",")
sb.append(indent).append("byteSuffix = \"").append(byteSuffix).append("\"")
return sb
}
/**
* Provides an API for building a [BytesHexFormat].
*
* This class is a [builder](https://en.wikipedia.org/wiki/Builder_pattern) for [BytesHexFormat], and
* serves as the type of the `bytes` property when creating a new format using the `HexFormat { }` builder
* function. Each option in this class corresponds to an option in [BytesHexFormat] and defines it in the
* resulting format. For example, use `val format = HexFormat { bytes.byteSeparator = true }` to set
* [BytesHexFormat.byteSeparator]. Refer to [BytesHexFormat] for details about how the configured
* format options affect formatting and parsing results.
*/
public class Builder internal constructor() {
/**
* Defines [BytesHexFormat.bytesPerLine] of the format being built, [Int.MAX_VALUE] by default.
*
* The value must be positive.
*
* Refer to [BytesHexFormat.bytesPerLine] for details about how this format option affects
* the formatting and parsing results.
*
* @throws IllegalArgumentException if a non-positive value is assigned to this property.
*
* @sample samples.text.HexFormats.ByteArrays.bytesPerLine
*/
public var bytesPerLine: Int = Default.bytesPerLine
set(value) {
if (value <= 0)
throw IllegalArgumentException("Non-positive values are prohibited for bytesPerLine, but was $value")
field = value
}
/**
* Defines [BytesHexFormat.bytesPerGroup] of the format being built, [Int.MAX_VALUE] by default.
*
* The value must be positive.
*
* Refer to [BytesHexFormat.bytesPerGroup] for details about how this format option affects
* the formatting and parsing results.
*
* @throws IllegalArgumentException if a non-positive value is assigned to this property.
*
* @sample samples.text.HexFormats.ByteArrays.bytesPerGroup
*/
public var bytesPerGroup: Int = Default.bytesPerGroup
set(value) {
if (value <= 0)
throw IllegalArgumentException("Non-positive values are prohibited for bytesPerGroup, but was $value")
field = value
}
/**
* Defines [BytesHexFormat.groupSeparator] of the format being built, two space characters (`" "`) by default.
*
* Refer to [BytesHexFormat.groupSeparator] for details about how this format option affects
* the formatting and parsing results.
*
* @sample samples.text.HexFormats.ByteArrays.bytesPerGroup
*/
public var groupSeparator: String = Default.groupSeparator
/**
* Defines [BytesHexFormat.byteSeparator] of the format being built, empty string by default.
*
* The string must not contain line feed (LF) and carriage return (CR) characters.
*
* Refer to [BytesHexFormat.byteSeparator] for details about how this format option affects
* the formatting and parsing results.
*
* @throws IllegalArgumentException if a string containing LF or CR character is assigned to this property.
*
* @sample samples.text.HexFormats.ByteArrays.byteSeparator
*/
public var byteSeparator: String = Default.byteSeparator
set(value) {
if (value.contains('\n') || value.contains('\r'))
throw IllegalArgumentException("LF and CR characters are prohibited in byteSeparator, but was $value")
field = value
}
/**
* Defines [BytesHexFormat.bytePrefix] of the format being built, empty string by default.
*
* The string must not contain line feed (LF) and carriage return (CR) characters.
*
* Refer to [BytesHexFormat.bytePrefix] for details about how this format option affects
* the formatting and parsing results.
*
* @throws IllegalArgumentException if a string containing LF or CR character is assigned to this property.
*
* @sample samples.text.HexFormats.ByteArrays.bytePrefix
*/
public var bytePrefix: String = Default.bytePrefix
set(value) {
if (value.contains('\n') || value.contains('\r'))
throw IllegalArgumentException("LF and CR characters are prohibited in bytePrefix, but was $value")
field = value
}
/**
* Defines [BytesHexFormat.byteSuffix] of the format being built, empty string by default.
*
* The string must not contain line feed (LF) and carriage return (CR) characters.
*
* Refer to [BytesHexFormat.byteSuffix] for details about how this format option affects
* the formatting and parsing results.
*
* @throws IllegalArgumentException if a string containing LF or CR character is assigned to this property.
*
* @sample samples.text.HexFormats.ByteArrays.byteSuffix
*/
public var byteSuffix: String = Default.byteSuffix
set(value) {
if (value.contains('\n') || value.contains('\r'))
throw IllegalArgumentException("LF and CR characters are prohibited in byteSuffix, but was $value")
field = value
}
internal fun build(): BytesHexFormat {
return BytesHexFormat(bytesPerLine, bytesPerGroup, groupSeparator, byteSeparator, bytePrefix, byteSuffix)
}
}
internal companion object {
internal val Default = BytesHexFormat(
bytesPerLine = Int.MAX_VALUE,
bytesPerGroup = Int.MAX_VALUE,
groupSeparator = " ",
byteSeparator = "",
bytePrefix = "",
byteSuffix = ""
)
}
}
/**
* Represents hexadecimal format options for formatting and parsing numeric values.
*
* These options are utilized by functions like [Int.toHexString] for formatting and [String.hexToInt] for parsing.
* The formatting and parsing functions are available for all integer numeric types.
*
* When formatting, the result consists of a [prefix] string, the hexadecimal representation of the numeric value,
* and a [suffix] string. The hexadecimal representation of a value is calculated by mapping each four-bit chunk
* of its binary representation to the corresponding hexadecimal digit, starting with the most significant bits.
* The [upperCase] option determines the case (`A-F` or `a-f`) of the hexadecimal digits.
* If [removeLeadingZeros] is `true` and the hexadecimal representation is longer than [minLength], leading zeros
* are removed until the length matches [minLength]. However, if [minLength] exceeds the length of the hexadecimal
* representation, [removeLeadingZeros] is ignored, and zeros are added to the start of the representation to
* achieve the specified [minLength].
*
* For example, the binary representation of the `Int` value `58` (32-bit long `00000000000000000000000000111010`)
* converts to the hexadecimal representation `0000003a` or `0000003A`, depending on [upperCase].
* With [removeLeadingZeros] set to `true`, it shortens to `3a`. However, if [minLength] is set to `6`, the removal of
* leading zeros stops once the length is reduced to `00003a`. Setting [minLength] to `12` results in
* `00000000003a`, where the [removeLeadingZeros] option is ignored due to the minimum length requirement.
*
* To format a value into a hexadecimal string of a particular length, start by converting the value to a type with
* the suitable bit size. For instance, to format an `Int` value into a 4-digit hexadecimal string, convert the value
* using `toShort()` before hexadecimal formatting. To obtain a maximum of 4 digits without leading zeros,
* additionally set [removeLeadingZeros] to `true`.
*
* When parsing, the input string must start with the [prefix] and end with the [suffix]. It must contain at least
* one hexadecimal digit between them. If the number of hexadecimal digits exceeds the capacity of the type being
* parsed, based on its bit size, the excess leading digits must be zeros. Parsing of the [prefix], [suffix], and
* hexadecimal digits is performed in a case-insensitive manner. The [removeLeadingZeros] and [minLength] options
* are ignored during parsing.
*
* This class is immutable and cannot be created or configured directly. To create a new format, use the
* `HexFormat { }` builder function and configure the options of the `number` property inside the braces. For
* example, use `val format = HexFormat { number.prefix = "0x" }` to set the [prefix]. The `number` property is of
* type [NumberHexFormat.Builder], whose options are configurable and correspond to the options of this class.
*
* @sample samples.text.HexFormats.Numbers.numberHexFormat
*/
public class NumberHexFormat internal constructor(
/**
* The string that immediately precedes the hexadecimal representation of a numeric value,
* empty string by default.
*
* When formatting, this string is placed before the hexadecimal representation.
* When parsing, the string being parsed must start with this string.
* The parsing of this prefix is performed in a case-insensitive manner.
*
* @sample samples.text.HexFormats.Numbers.prefix
*/
public val prefix: String,
/**
* The string that immediately succeeds the hexadecimal representation of a numeric value,
* empty string by default.
*
* When formatting, this string is placed after the hexadecimal representation.
* When parsing, the string being parsed must end with this string.
* The parsing of this suffix is performed in a case-insensitive manner.
*
* @sample samples.text.HexFormats.Numbers.suffix
*/
public val suffix: String,
/**
* Specifies whether to remove leading zeros in the hexadecimal representation of a numeric value,
* `false` by default.
*
* The hexadecimal representation of a value is calculated by mapping each four-bit chunk of its binary
* representation to the corresponding hexadecimal digit, starting with the most significant bits.
*
* When formatting, if this option is `true` and the length of the hexadecimal representation exceeds
* [minLength], leading zeros are removed until the length matches [minLength]. If the length
* does not exceed [minLength], this option has no effect on the formatting result.
*
* When parsing, this option is ignored.
*
* @sample samples.text.HexFormats.Numbers.removeLeadingZeros
*/
public val removeLeadingZeros: Boolean,
/**
* Specifies the minimum number of hexadecimal digits to be used in the representation of a numeric value,
* `1` by default.
*
* The hexadecimal representation of a value is calculated by mapping each four-bit chunk of its binary
* representation to the corresponding hexadecimal digit, starting with the most significant bits.
*
* When formatting:
* - If this option is less than the length of the hexadecimal representation:
* - If [removeLeadingZeros] is `true`, leading zeros are removed until the length matches [minLength].
* - If [removeLeadingZeros] is `false`, the representation remains unchanged, as no leading zeros are removed.
* - If this option is greater than the length of the hexadecimal representation, the
* representation is padded with zeros at the start to reach the specified [minLength].
* - If this option matches the length of the hexadecimal representation, the representation remains unchanged.
*
* When parsing, this option is ignored. However, there must be at least one hexadecimal digit in the input
* string. If the number of hexadecimal digits exceeds the capacity of the type being parsed, based on its bit
* size, the excess leading digits must be zeros.
*
* @sample samples.text.HexFormats.Numbers.minLength
*/
@SinceKotlin("2.0")
public val minLength: Int
) {
internal val isDigitsOnly: Boolean = prefix.isEmpty() && suffix.isEmpty()
internal val isDigitsOnlyAndNoPadding: Boolean = isDigitsOnly && minLength == 1
/**
* Whether to ignore case when parsing format strings.
* If false, case-sensitive parsing is conducted, which is faster.
*/
internal val ignoreCase: Boolean = prefix.isCaseSensitive() || suffix.isCaseSensitive()
override fun toString(): String = buildString {
append("NumberHexFormat(").appendLine()
appendOptionsTo(this, indent = " ").appendLine()
append(")")
}
internal fun appendOptionsTo(sb: StringBuilder, indent: String): StringBuilder {
sb.append(indent).append("prefix = \"").append(prefix).appendLine("\",")
sb.append(indent).append("suffix = \"").append(suffix).appendLine("\",")
sb.append(indent).append("removeLeadingZeros = ").append(removeLeadingZeros).appendLine(',')
sb.append(indent).append("minLength = ").append(minLength)
return sb
}
/**
* Provides an API for building a [NumberHexFormat].
*
* This class is a [builder](https://en.wikipedia.org/wiki/Builder_pattern) for [NumberHexFormat], and
* serves as the type of the `number` property when creating a new format using the `HexFormat { }` builder
* function. Each option in this class corresponds to an option in [NumberHexFormat] and defines it in the
* resulting format. For example, use `val format = HexFormat { number.removeLeadingZeros = true }` to set
* [NumberHexFormat.removeLeadingZeros]. Refer to [NumberHexFormat] for details about how the configured
* format options affect formatting and parsing results.
*
* @sample samples.text.HexFormats.Numbers.numberHexFormat
*/
public class Builder internal constructor() {
/**
* Defines [NumberHexFormat.prefix] of the format being built, empty string by default.
*
* The string must not contain line feed (LF) and carriage return (CR) characters.
*
* Refer to [NumberHexFormat.prefix] for details about how this format option affects
* the formatting and parsing results.
*
* @throws IllegalArgumentException if a string containing LF or CR character is assigned to this property.
*
* @sample samples.text.HexFormats.Numbers.prefix
*/
public var prefix: String = Default.prefix
set(value) {
if (value.contains('\n') || value.contains('\r'))
throw IllegalArgumentException("LF and CR characters are prohibited in prefix, but was $value")
field = value
}
/**
* Defines [NumberHexFormat.suffix] of the format being built, empty string by default.
*
* The string must not contain line feed (LF) and carriage return (CR) characters.
*
* Refer to [NumberHexFormat.suffix] for details about how the format option affects
* the formatting and parsing results.
*
* @throws IllegalArgumentException if a string containing LF or CR character is assigned to this property.
*
* @sample samples.text.HexFormats.Numbers.suffix
*/
public var suffix: String = Default.suffix
set(value) {
if (value.contains('\n') || value.contains('\r'))
throw IllegalArgumentException("LF and CR characters are prohibited in suffix, but was $value")
field = value
}
/**
* Defines [NumberHexFormat.removeLeadingZeros] of the format being built, `false` by default.
*
* Refer to [NumberHexFormat.removeLeadingZeros] for details about how the format option affects
* the formatting and parsing results.
*
* @sample samples.text.HexFormats.Numbers.removeLeadingZeros
*/
public var removeLeadingZeros: Boolean = Default.removeLeadingZeros
/**
* Defines [NumberHexFormat.minLength] of the format being built, `1` by default.
*
* The value must be positive.
*
* Refer to [NumberHexFormat.minLength] for details about how the format option affects
* the formatting and parsing results.
*
* @throws IllegalArgumentException if a non-positive value is assigned to this property.
*
* @sample samples.text.HexFormats.Numbers.minLength
*/
@SinceKotlin("2.0")
public var minLength: Int = Default.minLength
set(value) {
require(value > 0) { "Non-positive values are prohibited for minLength, but was $value" }
field = value
}
internal fun build(): NumberHexFormat {
return NumberHexFormat(prefix, suffix, removeLeadingZeros, minLength)
}
}
internal companion object {
internal val Default = NumberHexFormat(
prefix = "",
suffix = "",
removeLeadingZeros = false,
minLength = 1
)
}
}
/**
* Provides an API for building a [HexFormat].
*
* This class is a [builder](https://en.wikipedia.org/wiki/Builder_pattern) for [HexFormat], and
* serves as the receiver type of the lambda expression used in the `HexFormat { }` builder function to create a
* new format. Each option in this class corresponds to an option in [HexFormat] and defines it in the resulting
* format. For example, use `val format = HexFormat { bytes.byteSeparator = ":" }` to set
* [BytesHexFormat.byteSeparator] option of the [HexFormat.bytes] property.
*
* Refer to [HexFormat] for details about how the configured format options affect formatting and parsing results.
*
* @sample samples.text.HexFormats.HexFormatClass.hexFormatBuilderFunction
*/
public class Builder @PublishedApi internal constructor() {
/**
* Defines [HexFormat.upperCase] of the format being built, `false` by default.
*
* Refer to [HexFormat.upperCase] for details about how the format option affects the formatting results.
*
* @sample samples.text.HexFormats.HexFormatClass.upperCase
*/
public var upperCase: Boolean = Default.upperCase
/**
* Defines [HexFormat.bytes] of the format being built.
*
* Refer to [BytesHexFormat] for details about the available format options, their impact on formatting and
* parsing results, and their default settings.
*/
public val bytes: BytesHexFormat.Builder
get() {
if (_bytes == null) {
_bytes = BytesHexFormat.Builder()
}
return _bytes!!
}
private var _bytes: BytesHexFormat.Builder? = null
/**
* Defines [HexFormat.number] of the format being built.
*
* Refer to [NumberHexFormat] for details about the available format options, their impact on formatting and
* parsing results, and their default settings.
*/
public val number: NumberHexFormat.Builder
get() {
if (_number == null) {
_number = NumberHexFormat.Builder()
}
return _number!!
}
private var _number: NumberHexFormat.Builder? = null
/**
* Provides a scope for configuring the `bytes` property.
*
* The receiver of the [builderAction] is the `bytes` property. Thus, inside the braces one can configure its
* options directly. This convenience function is intended to enable the configuration of multiple options
* within a single block. For example, the snippet:
* ```kotlin
* val format = HexFormat {
* bytes {
* bytesPerLine = 16
* bytesPerGroup = 8
* byteSeparator = " "
* }
* }
* ```
* is equivalent to:
* ```kotlin
* val format = HexFormat {
* bytes.bytesPerLine = 16
* bytes.bytesPerGroup = 8
* bytes.byteSeparator = " "
* }
* ```
*
* Refer to [BytesHexFormat] for details about the available format options, their impact on formatting and
* parsing results, and their default settings.
*
* @param builderAction The function that is applied to the `bytes` property, providing a scope for directly
* configuring its options.
*/
@InlineOnly
public inline fun bytes(builderAction: BytesHexFormat.Builder.() -> Unit) {
bytes.builderAction()
}
/**
* Provides a scope for configuring the `number` property.
*
* The receiver of the [builderAction] is the `number` property. Thus, inside the braces one can configure its
* options directly. This convenience function is intended to enable the configuration of multiple options
* within a single block. For example, the snippet:
* ```kotlin
* val format = HexFormat {
* number {
* prefix = "&#x"
* suffix = ";"
* removeLeadingZeros = true
* }
* }
* ```
* is equivalent to:
* ```kotlin
* val format = HexFormat {
* number.prefix = "&#x"
* number.suffix = ";"
* number.removeLeadingZeros = true
* }
* ```
*
* Refer to [NumberHexFormat] for details about the available format options, their impact on formatting
* and parsing results, and their default settings.
*
* @param builderAction The function that is applied to the `number` property, providing a scope for directly
* configuring its options.
*/
@InlineOnly
public inline fun number(builderAction: NumberHexFormat.Builder.() -> Unit) {
number.builderAction()
}
@PublishedApi
internal fun build(): HexFormat {
return HexFormat(
upperCase,
_bytes?.build() ?: BytesHexFormat.Default,
_number?.build() ?: NumberHexFormat.Default
)
}
}
public companion object {
/**
* The default hexadecimal format options.
*
* This [HexFormat] instance adopts default values for all format options.
*
* Formatting functions use lower-case hexadecimal digits (`0-9`, `a-f`) for both byte arrays and
* numeric values. Specifically, [upperCase] is set to `false`.
*
* No line separator, group separator, byte separator, byte prefix, or byte suffix is used
* when formatting or parsing byte arrays. Specifically:
* * [bytes.bytesPerLine][BytesHexFormat.bytesPerLine] is set to `Int.MAX_VALUE`.
* * [bytes.bytesPerGroup][BytesHexFormat.bytesPerGroup] is set to `Int.MAX_VALUE`.
* * [bytes.byteSeparator][BytesHexFormat.byteSeparator], [bytes.bytePrefix][BytesHexFormat.bytePrefix],
* and [bytes.byteSuffix][BytesHexFormat.byteSuffix] are empty strings.
*
* No prefix or suffix is used, and leading zeros are not removed from the hexadecimal representation
* when formatting or parsing numeric values. Specifically:
* * [number.prefix][NumberHexFormat.prefix] and [number.suffix][NumberHexFormat.suffix] are empty strings.
* * [number.removeLeadingZeros][NumberHexFormat.removeLeadingZeros] is set to `false`.
*/
public val Default: HexFormat = HexFormat(
upperCase = false,
bytes = BytesHexFormat.Default,
number = NumberHexFormat.Default,
)
/**
* The hexadecimal format options configured to use upper-case hexadecimal digits.
*
* This [HexFormat] instance adopts default values for all format options, except for [upperCase],
* which is set to `true`. As a result, formatting functions will use upper-case hexadecimal digits
* (`0-9`, `A-F`) for both byte arrays and numeric values.
*
* In all other aspects, this format is identical to the [Default] format.
*/
public val UpperCase: HexFormat = HexFormat(
upperCase = true,
bytes = BytesHexFormat.Default,
number = NumberHexFormat.Default,
)
}
}
/**
* Builds a new [HexFormat] by configuring its format options using the specified [builderAction],
* and returns the resulting format.
*
* The resulting format can be passed to formatting and parsing functions to dictate how formatting and parsing
* should be conducted. For example, `val format = HexFormat { number.prefix = "0x" }` creates a new [HexFormat] and
* assigns it to the `format` variable. When this `format` is passed to a number formatting function, the resulting
* string will include `"0x"` as the prefix of the hexadecimal representation of the numeric value being formatted.
* For instance, calling `58.toHexString(format)` will produce `"0x0000003a"`.
*
* Refer to [HexFormat.Builder] for details on configuring format options, and see [HexFormat] for
* information on how the configured format options affect formatting and parsing results.
*
* The builder provided as a receiver to the [builderAction] is valid only within that function.
* Using it outside the function can produce an unspecified behavior.
*
* @param builderAction The function that configures the format options of the [HexFormat.Builder] receiver.
* @return A new instance of [HexFormat] configured as specified by the [builderAction].
*
* @sample samples.text.HexFormats.HexFormatClass.hexFormatBuilderFunction
*/
@ExperimentalStdlibApi
@SinceKotlin("1.9")
@InlineOnly
public inline fun HexFormat(builderAction: HexFormat.Builder.() -> Unit): HexFormat {
return HexFormat.Builder().apply(builderAction).build()
}
// --- private functions ---
private fun String.isCaseSensitive(): Boolean {
return this.any { it >= '\u0080' || it.isLetter() }
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