#include <span.h>
#include <util/strencodings.h>
#include <array>
#include <cassert>
#include <cstring>
#include <limits>
#include <optional>
#include <ostream>
#include <string>
#include <vector>

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Functions
std::string	SanitizeString (std::string_view str, int rule)
	Remove unsafe chars. More...

signed char	HexDigit (char c)

bool	IsHex (std::string_view str)

bool	IsHexNumber (std::string_view str)
	Return true if the string is a hex number, optionally prefixed with "0x". More...

template<typename Byte >
std::optional< std::vector< Byte > >	TryParseHex (std::string_view str)
	Parse the hex string into bytes (uint8_t or std::byte). More...

bool	SplitHostPort (std::string_view in, uint16_t &portOut, std::string &hostOut)
	Splits socket address string into host string and port value. More...

std::string	EncodeBase64 (Span< const unsigned char > input)

std::optional< std::vector< unsigned char > >	DecodeBase64 (std::string_view str)

std::string	EncodeBase32 (Span< const unsigned char > input, bool pad)
	Base32 encode. More...

std::string	EncodeBase32 (std::string_view str, bool pad)
	Base32 encode. More...

std::optional< std::vector< unsigned char > >	DecodeBase32 (std::string_view str)

bool	ParseInt32 (std::string_view str, int32_t *out)
	Convert string to signed 32-bit integer with strict parse error feedback. More...

bool	ParseInt64 (std::string_view str, int64_t *out)
	Convert string to signed 64-bit integer with strict parse error feedback. More...

bool	ParseUInt8 (std::string_view str, uint8_t *out)
	Convert decimal string to unsigned 8-bit integer with strict parse error feedback. More...

bool	ParseUInt16 (std::string_view str, uint16_t *out)
	Convert decimal string to unsigned 16-bit integer with strict parse error feedback. More...

bool	ParseUInt32 (std::string_view str, uint32_t *out)
	Convert decimal string to unsigned 32-bit integer with strict parse error feedback. More...

bool	ParseUInt64 (std::string_view str, uint64_t *out)
	Convert decimal string to unsigned 64-bit integer with strict parse error feedback. More...

std::string	FormatParagraph (std::string_view in, size_t width, size_t indent)
	Format a paragraph of text to a fixed width, adding spaces for indentation to any added line. More...

static bool	ProcessMantissaDigit (char ch, int64_t &mantissa, int &mantissa_tzeros)
	Helper function for ParseFixedPoint. More...

bool	ParseFixedPoint (std::string_view val, int decimals, int64_t *amount_out)
	Parse number as fixed point according to JSON number syntax. More...

std::string	ToLower (std::string_view str)
	Returns the lowercase equivalent of the given string. More...

std::string	ToUpper (std::string_view str)
	Returns the uppercase equivalent of the given string. More...

std::string	Capitalize (std::string str)
	Capitalizes the first character of the given string. More...

std::string	HexStr (const Span< const uint8_t > s)
	Convert a span of bytes to a lower-case hexadecimal string. More...

std::optional< uint64_t >	ParseByteUnits (std::string_view str, ByteUnit default_multiplier)
	Parse a string with suffix unit [k\|K\|m\|M\|g\|G\|t\|T]. More...

Variables
static const std::string	CHARS_ALPHA_NUM = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"

static const std::string	SAFE_CHARS []

const signed char	p_util_hexdigit [256]

static const int64_t	UPPER_BOUND = 1000000000000000000LL - 1LL
	Upper bound for mantissa. More...

Function Documentation

◆ Capitalize()

std::string Capitalize ( std::string str )

Capitalizes the first character of the given string.

This function is locale independent. It only converts lowercase characters in the standard 7-bit ASCII range. This is a feature, not a limitation.

Parameters

[in] str the string to capitalize.

Returns: string with the first letter capitalized.

Definition at line 462 of file strencodings.cpp.

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◆ DecodeBase32()

std::optional<std::vector<unsigned char> > DecodeBase32 ( std::string_view str )

Definition at line 196 of file strencodings.cpp.

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◆ DecodeBase64()

std::optional<std::vector<unsigned char> > DecodeBase64 ( std::string_view str )

Definition at line 141 of file strencodings.cpp.

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◆ EncodeBase32() [1/2]

std::string EncodeBase32	(	Span< const unsigned char >	input,
		bool	pad = `true`
	)

Base32 encode.

If pad is true, then the output will be padded with '=' so that its length is a multiple of 8.

Definition at line 176 of file strencodings.cpp.

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◆ EncodeBase32() [2/2]

std::string EncodeBase32	(	std::string_view	str,
		bool	pad = `true`
	)

Base32 encode.

If pad is true, then the output will be padded with '=' so that its length is a multiple of 8.

Definition at line 191 of file strencodings.cpp.

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◆ EncodeBase64()

std::string EncodeBase64 ( Span< const unsigned char > input )

Definition at line 130 of file strencodings.cpp.

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◆ FormatParagraph()

std::string FormatParagraph	(	std::string_view	in,
		size_t	width,
		size_t	indent
	)

Format a paragraph of text to a fixed width, adding spaces for indentation to any added line.

Definition at line 285 of file strencodings.cpp.

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◆ HexDigit()

signed char HexDigit ( char c )

Definition at line 57 of file strencodings.cpp.

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◆ HexStr()

std::string HexStr ( const Span< const uint8_t > s )

Convert a span of bytes to a lower-case hexadecimal string.

Definition at line 487 of file strencodings.cpp.

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◆ IsHex()

bool IsHex ( std::string_view str )

Definition at line 62 of file strencodings.cpp.

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◆ IsHexNumber()

bool IsHexNumber ( std::string_view str )

Return true if the string is a hex number, optionally prefixed with "0x".

Definition at line 70 of file strencodings.cpp.

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◆ ParseByteUnits()

std::optional<uint64_t> ParseByteUnits	(	std::string_view	str,
		ByteUnit	default_multiplier
	)

Parse a string with suffix unit [k|K|m|M|g|G|t|T].

Must be a whole integer, fractions not allowed (0.5t), no whitespace or +- Lowercase units are 1000 base. Uppercase units are 1024 base. Examples: 2m,27M,19g,41T

Parameters

[in]	str	the string to convert into bytes
[in]	default_multiplier	if no unit is found in str use this unit

Returns: optional uint64_t bytes from str or nullopt if ToIntegral is false, str is empty, trailing whitespace or overflow

Definition at line 503 of file strencodings.cpp.

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◆ ParseFixedPoint()

bool ParseFixedPoint	(	std::string_view	val,
		int	decimals,
		int64_t *	amount_out
	)

Parse number as fixed point according to JSON number syntax.

Returns: true on success, false on error.

Note: The result must be in the range (-10^18,10^18), otherwise an overflow error will trigger.

Definition at line 354 of file strencodings.cpp.

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◆ ParseInt32()

bool ParseInt32	(	std::string_view	str,
		int32_t *	out
	)

Convert string to signed 32-bit integer with strict parse error feedback.

Returns: true if the entire string could be parsed as valid integer, false if not the entire string could be parsed or when overflow or underflow occurred.

Definition at line 255 of file strencodings.cpp.

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◆ ParseInt64()

bool ParseInt64	(	std::string_view	str,
		int64_t *	out
	)

Convert string to signed 64-bit integer with strict parse error feedback.

Returns: true if the entire string could be parsed as valid integer, false if not the entire string could be parsed or when overflow or underflow occurred.

Definition at line 260 of file strencodings.cpp.

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◆ ParseUInt16()

bool ParseUInt16	(	std::string_view	str,
		uint16_t *	out
	)

Convert decimal string to unsigned 16-bit integer with strict parse error feedback.

Returns: true if the entire string could be parsed as valid integer, false if the entire string could not be parsed or if overflow or underflow occurred.

Definition at line 270 of file strencodings.cpp.

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◆ ParseUInt32()

bool ParseUInt32	(	std::string_view	str,
		uint32_t *	out
	)

Convert decimal string to unsigned 32-bit integer with strict parse error feedback.

Returns: true if the entire string could be parsed as valid integer, false if not the entire string could be parsed or when overflow or underflow occurred.

Definition at line 275 of file strencodings.cpp.

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◆ ParseUInt64()

bool ParseUInt64	(	std::string_view	str,
		uint64_t *	out
	)

Convert decimal string to unsigned 64-bit integer with strict parse error feedback.

Returns: true if the entire string could be parsed as valid integer, false if not the entire string could be parsed or when overflow or underflow occurred.

Definition at line 280 of file strencodings.cpp.

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◆ ParseUInt8()

bool ParseUInt8	(	std::string_view	str,
		uint8_t *	out
	)

Convert decimal string to unsigned 8-bit integer with strict parse error feedback.

Returns: true if the entire string could be parsed as valid integer, false if not the entire string could be parsed or when overflow or underflow occurred.

Definition at line 265 of file strencodings.cpp.

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◆ ProcessMantissaDigit()

static bool ProcessMantissaDigit	(	char	ch,
		int64_t &	mantissa,
		int &	mantissa_tzeros
	)

inlinestatic

Helper function for ParseFixedPoint.

Definition at line 338 of file strencodings.cpp.

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◆ SanitizeString()

std::string SanitizeString	(	std::string_view	str,
		int	rule = `SAFE_CHARS_DEFAULT`
	)

Remove unsafe chars.

Safe chars chosen to allow simple messages/URLs/email addresses, but avoid anything even possibly remotely dangerous like & or >

Parameters

[in]	str	The string to sanitize
[in]	rule	The set of safe chars to choose (default: least restrictive)

Returns: A new string without unsafe chars

Definition at line 28 of file strencodings.cpp.

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◆ SplitHostPort()

bool SplitHostPort	(	std::string_view	in,
		uint16_t &	portOut,
		std::string &	hostOut
	)

Splits socket address string into host string and port value.

Validates port value.

Parameters

[in]	in	The socket address string to split.
[out]	portOut	Port-portion of the input, if found and parsable.
[out]	hostOut	Host-portion of the input, if found.

Returns: true if port-portion is absent or within its allowed range, otherwise false

Definition at line 103 of file strencodings.cpp.

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◆ ToLower()

std::string ToLower ( std::string_view str )

Returns the lowercase equivalent of the given string.

This function is locale independent. It only converts uppercase characters in the standard 7-bit ASCII range. This is a feature, not a limitation.

Parameters

[in] str the string to convert to lowercase.

Returns: lowercased equivalent of str

Definition at line 446 of file strencodings.cpp.

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◆ ToUpper()

std::string ToUpper ( std::string_view str )

Returns the uppercase equivalent of the given string.

This function is locale independent. It only converts lowercase characters in the standard 7-bit ASCII range. This is a feature, not a limitation.

Parameters

[in] str the string to convert to uppercase.

Returns: UPPERCASED EQUIVALENT OF str

Definition at line 454 of file strencodings.cpp.

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◆ TryParseHex()

template<typename Byte >

template std::optional< std::vector< uint8_t > > TryParseHex ( std::string_view str )

Parse the hex string into bytes (uint8_t or std::byte).

Ignores whitespace. Returns nullopt on invalid input.

Definition at line 81 of file strencodings.cpp.

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Variable Documentation

◆ CHARS_ALPHA_NUM

const std::string CHARS_ALPHA_NUM = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"

static

Definition at line 18 of file strencodings.cpp.

◆ p_util_hexdigit

const signed char p_util_hexdigit[256]

Initial value:

=
{ -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
  -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
  -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
  0,1,2,3,4,5,6,7,8,9,-1,-1,-1,-1,-1,-1,
  -1,0xa,0xb,0xc,0xd,0xe,0xf,-1,-1,-1,-1,-1,-1,-1,-1,-1,
  -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
  -1,0xa,0xb,0xc,0xd,0xe,0xf,-1,-1,-1,-1,-1,-1,-1,-1,-1,
  -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
  -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
  -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
  -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
  -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
  -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
  -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
  -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
  -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1, }

Definition at line 39 of file strencodings.cpp.

◆ SAFE_CHARS

const std::string SAFE_CHARS[]

static

Initial value:

=
{
    CHARS_ALPHA_NUM + " .,;-_/:?@()", 
    CHARS_ALPHA_NUM + " .,;-_?@", 
    CHARS_ALPHA_NUM + ".-_", 
    CHARS_ALPHA_NUM + "!*'();:@&=+$,/?#[]-_.~%", 
}

Definition at line 20 of file strencodings.cpp.

◆ UPPER_BOUND

const int64_t UPPER_BOUND = 1000000000000000000LL - 1LL

static

Upper bound for mantissa.

10^18-1 is the largest arbitrary decimal that will fit in a signed 64-bit integer. Larger integers cannot consist of arbitrary combinations of 0-9:

999999999999999999 1^18-1 9223372036854775807 (1<<63)-1 (max int64_t) 9999999999999999999 1^19-1 (would overflow)

Definition at line 335 of file strencodings.cpp.

Functions

Variables

Function Documentation

◆ Capitalize()

◆ DecodeBase32()

◆ DecodeBase64()

◆ EncodeBase32() [1/2]

◆ EncodeBase32() [2/2]

◆ EncodeBase64()

◆ FormatParagraph()

◆ HexDigit()

◆ HexStr()

◆ IsHex()

◆ IsHexNumber()

◆ ParseByteUnits()

◆ ParseFixedPoint()

◆ ParseInt32()

◆ ParseInt64()

◆ ParseUInt16()

◆ ParseUInt32()

◆ ParseUInt64()

◆ ParseUInt8()

◆ ProcessMantissaDigit()

◆ SanitizeString()

◆ SplitHostPort()

◆ ToLower()

◆ ToUpper()

◆ TryParseHex()

Variable Documentation

◆ CHARS_ALPHA_NUM

◆ p_util_hexdigit

◆ SAFE_CHARS

◆ UPPER_BOUND