Data Stream Encoder and Decoder. More...

Classes
class	jau::codec::base::alphabet
	Base Alphabet Specification providing the alphabet for encode() and decode(). More...

class	jau::codec::base::ascii38_alphabet
	Safe base 38 alphabet with ASCII code-point sorting order. More...

class	jau::codec::base::ascii64_alphabet
	Safe base 64 alphabet with ASCII code-point sorting order. More...

class	jau::codec::base::ascii86_alphabet
	Base 86 alphabet with ASCII code-point sorting order. More...

class	jau::codec::base::base64_alphabet
	Safe canonical `base64` alphabet, without ASCII code-point sorting order. More...

class	jau::codec::base::base64url_alphabet
	Safe canonical `base64url` alphabet, without ASCII code-point sorting order. More...

class	jau::codec::base::natural64_alphabet
	Safe natural base 64 alphabet, both without ASCII code-point sorting order. More...

class	jau::codec::base::natural86_alphabet
	Natural base 86 alphabet, without ASCII code-point sorting order. More...

Functions
int64_t	jau::codec::base::decode (const std::string_view &str, const alphabet &aspec) noexcept
	Decodes a given symbolic string representing a given alphabet and its base to a positive decimal number.

std::vector< uint8_t >	jau::codec::base::decode64 (const std::string_view &str, const alphabet &aspec) noexcept
	Decodes a given symbolic string representing using given alphabet and fixed base 64 to octets according to `base64` RFC 4648.

std::vector< uint8_t >	jau::codec::base::decode64_lf (const std::string_view &str, const alphabet &aspec) noexcept
	Decodes a given symbolic string representing using given alphabet and fixed base 64 to octets according to `base64` RFC 4648 and removes all linefeeds before decoding as required for PEM and MIME.

std::vector< uint8_t >	jau::codec::base::decode64_lf (std::string &str, const alphabet &aspec) noexcept
	Decodes a given symbolic string representing using given alphabet and fixed base 64 to octets according to `base64` RFC 4648 and removes all linefeeds before decoding as required for PEM and MIME.

std::string	jau::codec::base::encode (int num, const alphabet &aspec, const unsigned int min_width=0) noexcept
	Encodes a given positive decimal number to a symbolic string representing a given alphabet and its base.

std::string	jau::codec::base::encode (int64_t num, const alphabet &aspec, const unsigned int min_width=0) noexcept
	Encodes a given positive decimal number to a symbolic string representing a given alphabet and its base.

std::string	jau::codec::base::encode64 (const void *in_octets, size_t in_len, const alphabet &aspec) noexcept
	Encodes given octets using the given alphabet and fixed base 64 encoding according to `base64` RFC 4648.

std::string	jau::codec::base::encode64_mime (const void *in_octets, size_t in_len, const alphabet &aspec) noexcept
	Encodes given octets using the given alphabet and fixed base 64 encoding according to `base64` RFC 4648 and adds line-feeds every 76 characters as required for MIME.

std::string	jau::codec::base::encode64_pem (const void *in_octets, size_t in_len, const alphabet &aspec) noexcept
	Encodes given octets using the given alphabet and fixed base 64 encoding according to `base64` RFC 4648 and adds line-feeds every 64 characters as required for PEM.

size_t	jau::codec::base::insert_lf (std::string &str, const size_t period) noexcept
	Inserts a line feed (LF) character `\n` (ASCII 0x0a) after every period of characters.

bool	jau::codec::base::operator!= (const alphabet &lhs, const alphabet &rhs) noexcept

bool	jau::codec::base::operator== (const alphabet &lhs, const alphabet &rhs) noexcept

size_t	jau::codec::base::remove_lf (std::string &str) noexcept
	Removes line feed character from str.

std::string	jau::codec::base::to_string (const alphabet &v) noexcept

Detailed Description

Data Stream Encoder and Decoder.

Supported codecs:

jau::codec::base::alphabet enables variable integer base encode() and fixed binary base-64 encode64().

Function Documentation

◆ to_string()

std::string jau::codec::base::to_string ( const alphabet & v )

inlinenoexcept

Definition at line 96 of file base_codec.hpp.

◆ operator!=()

bool jau::codec::base::operator!=	(	const alphabet &	lhs,
		const alphabet &	rhs )

inlinenoexcept

Definition at line 98 of file base_codec.hpp.

◆ operator==()

bool jau::codec::base::operator==	(	const alphabet &	lhs,
		const alphabet &	rhs )

inlinenoexcept

Definition at line 102 of file base_codec.hpp.

◆ encode() [1/2]

std::string jau::codec::base::encode	(	int	num,
		const alphabet &	aspec,
		const unsigned int	min_width = 0 )

noexcept

Encodes a given positive decimal number to a symbolic string representing a given alphabet and its base.

Besides using a custom alphabet, the following build-in alphabets are provided

Parameters

num	a positive decimal number
aspec	the used alphabet specification
min_width	minimum width of the encoded string, encoded zero is used for padding

Returns: the encoded string or an empty string if base exceeds alphabet::max_base() or invalid arguments

See also: encodeBase(); decodeBase()

Definition at line 33 of file base_codec.cpp.

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◆ encode() [2/2]

std::string jau::codec::base::encode	(	int64_t	num,
		const alphabet &	aspec,
		const unsigned int	min_width = 0 )

noexcept

Encodes a given positive decimal number to a symbolic string representing a given alphabet and its base.

Besides using a custom alphabet, the following build-in alphabets are provided

Parameters

num	a positive decimal number
aspec	the used alphabet specification
min_width	minimum width of the encoded string, encoded zero is used for padding

Returns: the encoded string or an empty string if base exceeds alphabet::max_base() or invalid arguments

See also: encodeBase(); decodeBase()

Definition at line 53 of file base_codec.cpp.

◆ decode()

int64_t jau::codec::base::decode	(	const std::string_view &	str,
		const alphabet &	aspec )

noexcept

Decodes a given symbolic string representing a given alphabet and its base to a positive decimal number.

Besides using a custom alphabet, the following build-in alphabets are provided

Parameters

str	an encoded string
aspec	the used alphabet specification

Returns: the decoded decimal value or -1 if base exceeds alphabet::max_base(), unknown code-point or invalid arguments

See also: encodeBase()

Definition at line 72 of file base_codec.cpp.

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◆ encode64()

std::string jau::codec::base::encode64	(	const void *	in_octets,
		size_t	in_len,
		const alphabet &	aspec )

noexcept

Encodes given octets using the given alphabet and fixed base 64 encoding according to base64 RFC 4648.

An error only occurs if in_len > 0 and resulting encoded string is empty.

Parameters

in_octets	pointer to octets start
in_len	length of octets in bytes
aspec	the used base 64 alphabet specification

Returns: the encoded string, empty if base exceeds alphabet::max_base() or invalid arguments

Definition at line 90 of file base_codec.cpp.

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◆ decode64()

std::vector< uint8_t > jau::codec::base::decode64	(	const std::string_view &	str,
		const alphabet &	aspec )

noexcept

Decodes a given symbolic string representing using given alphabet and fixed base 64 to octets according to base64 RFC 4648.

An error only occurs if the encoded string length > 0 and resulting decoded octets size is empty.

Parameters

str	encoded string
aspec	the used base 64 alphabet specification

Returns: the decoded octets, empty if base exceeds alphabet::max_base(), unknown code-point or invalid arguments

Definition at line 141 of file base_codec.cpp.

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◆ insert_lf()

size_t jau::codec::base::insert_lf	(	std::string &	str,
		const size_t	period )

noexcept

Inserts a line feed (LF) character \n (ASCII 0x0a) after every period of characters.

Parameters

str	the input string of characters, which will be mutated.
period	period of characters after which one LF will be inserted.

Returns: count of inserted LF characters

Definition at line 212 of file base_codec.cpp.

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◆ remove_lf()

size_t jau::codec::base::remove_lf ( std::string & str )

noexcept

Removes line feed character from str.

Parameters

str	the input string of characters, which will be mutated.

Returns: count of removed LF characters

Definition at line 224 of file base_codec.cpp.

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◆ encode64_pem()

std::string jau::codec::base::encode64_pem	(	const void *	in_octets,
		size_t	in_len,
		const alphabet &	aspec )

inlinenoexcept

Encodes given octets using the given alphabet and fixed base 64 encoding according to base64 RFC 4648 and adds line-feeds every 64 characters as required for PEM.

An error only occurs if in_len > 0 and resulting encoded string is empty.

Parameters

in_octets	pointer to octets start
in_len	length of octets in bytes
aspec	the used base 64 alphabet specification

Returns: the encoded string, empty if base exceeds alphabet::max_base() or invalid arguments

Definition at line 559 of file base_codec.hpp.

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◆ encode64_mime()

std::string jau::codec::base::encode64_mime	(	const void *	in_octets,
		size_t	in_len,
		const alphabet &	aspec )

inlinenoexcept

Encodes given octets using the given alphabet and fixed base 64 encoding according to base64 RFC 4648 and adds line-feeds every 76 characters as required for MIME.

An error only occurs if in_len > 0 and resulting encoded string is empty.

Parameters

in_octets	pointer to octets start
in_len	length of octets in bytes
aspec	the used base 64 alphabet specification

Returns: the encoded string, empty if base exceeds alphabet::max_base() or invalid arguments

Definition at line 577 of file base_codec.hpp.

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◆ decode64_lf() [1/2]

std::vector< uint8_t > jau::codec::base::decode64_lf	(	const std::string_view &	str,
		const alphabet &	aspec )

inlinenoexcept

Decodes a given symbolic string representing using given alphabet and fixed base 64 to octets according to base64 RFC 4648 and removes all linefeeds before decoding as required for PEM and MIME.

An error only occurs if the encoded string length > 0 and resulting decoded octets size is empty.

Parameters

str	and encoded string, will be copied
aspec	the used base 64 alphabet specification

Returns: the decoded octets, empty if base exceeds alphabet::max_base(), unknown code-point or invalid arguments

Definition at line 594 of file base_codec.hpp.

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◆ decode64_lf() [2/2]

std::vector< uint8_t > jau::codec::base::decode64_lf	(	std::string &	str,
		const alphabet &	aspec )

inlinenoexcept

Decodes a given symbolic string representing using given alphabet and fixed base 64 to octets according to base64 RFC 4648 and removes all linefeeds before decoding as required for PEM and MIME.

An error only occurs if the encoded string length > 0 and resulting decoded octets size is empty.

Parameters

str	and encoded string, no copy, will be mutated
aspec	the used base 64 alphabet specification

Returns: the decoded octets, empty if base exceeds alphabet::max_base(), unknown code-point or invalid arguments

Definition at line 611 of file base_codec.hpp.

Classes

Functions

Detailed Description

Function Documentation

◆ to_string()

◆ operator!=()

◆ operator==()

◆ encode() [1/2]

◆ encode() [2/2]

◆ decode()

◆ encode64()

◆ decode64()

◆ insert_lf()

◆ remove_lf()

◆ encode64_pem()

◆ encode64_mime()

◆ decode64_lf() [1/2]

◆ decode64_lf() [2/2]