Classes
class	StringSanitizer
	Implements a regular expression based string scrubber. More...

class	StringSanitizerImpl

class	StringTokenError
	A Set of C++ Utilities for Manipulating Strings. More...

Typedefs
using	StringSanitizerImplPtr = std::shared_ptr<StringSanitizerImpl>
	Type representing the pointer to the `StringSanitizerImpl`.

using	StringSanitizerPtr = std::unique_ptr<StringSanitizer>
	Type representing the pointer to the `StringSanitizer`.

Functions
void	decodeColonSeparatedHexString (const std::string &hex_string, std::vector< uint8_t > &binary)
	Converts a string of hexadecimal digits with colons into a vector.

void	decodeFormattedHexString (const std::string &hex_string, std::vector< uint8_t > &binary)
	Converts a formatted string of hexadecimal digits into a vector.

void	decodeSeparatedHexString (const std::string &hex_string, const std::string &sep, std::vector< uint8_t > &binary)
	Converts a string of separated hexadecimal digits into a vector.

string	dumpAsHex (const uint8_t *data, size_t length)
	Dumps a buffer of bytes as a string of hexadecimal digits.

bool	isPrintable (const std::string &content)
	Check if a string is printable.

bool	isPrintable (const std::vector< uint8_t > &content)
	Check if a byte vector is printable.

void	lowercase (std::string &text)
	Convert string to lowercase.

vector< uint8_t >	quotedStringToBinary (const std::string &quoted_string)
	Converts a string in quotes into vector.

template<typename Iterator >
Iterator	seekTrimmed (Iterator const &begin, Iterator end, uint8_t const trim_val)
	Finds the "trimmed" end of a buffer.

vector< string >	tokens (const std::string &text, const std::string &delim=" \t\n", bool escape=false)
	Split string into tokens.

char	toLower (char const chr)
	Convert character to lowercase.

char	toUpper (char const chr)
	Convert character to uppercase.

string	trim (const std::string &input)
	Trim leading and trailing spaces.

void	uppercase (std::string &text)
	Convert string to uppercase.

Typedef Documentation

◆ StringSanitizerImplPtr

using isc::util::str::StringSanitizerImplPtr = std::shared_ptr<StringSanitizerImpl>

Type representing the pointer to the StringSanitizerImpl.

Definition at line 219 of file str.h.

◆ StringSanitizerPtr

using isc::util::str::StringSanitizerPtr = std::unique_ptr<StringSanitizer>

Type representing the pointer to the StringSanitizer.

Definition at line 263 of file str.h.

Function Documentation

◆ decodeColonSeparatedHexString()

void isc::util::str::decodeColonSeparatedHexString	(	const std::string &	hex_string,
		std::vector< uint8_t > &	binary )

Converts a string of hexadecimal digits with colons into a vector.

Parameters

hex_string	Input string.
binary	Vector receiving converted string into binary.

Exceptions

isc::BadValue if the format of the input string is invalid.

Definition at line 158 of file str.cc.

References decodeSeparatedHexString().

Referenced by isc::dhcp::HWAddr::fromText().

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◆ decodeFormattedHexString()

void isc::util::str::decodeFormattedHexString	(	const std::string &	hex_string,
		std::vector< uint8_t > &	binary )

Converts a formatted string of hexadecimal digits into a vector.

This function supports the following formats:

yy:yy:yy:yy or yy yy yy yy - octets delimited by colons or spaces, see decodeSeparatedHexString
yyyyyyyyyy
0xyyyyyyyyyy

If there is an odd number of hexadecimal digits in the input string, the '0' is prepended to the string before decoding.

Parameters

hex_string	Input string.
binary	Vector receiving converted string into binary.

Exceptions

isc::BadValue if the format of the input string is invalid.

Definition at line 212 of file str.cc.

References isc::util::encode::decodeHex(), decodeSeparatedHexString(), and isc_throw.

Referenced by isc::dhcp::OptionDataParser::createOption(), isc::dhcp::IdentifierType< min_size, max_size >::fromText(), isc::dhcp::Dhcpv4Srv::recoverStashedAgentOption(), isc::dhcp::Host::setIdentifier(), isc::dhcp::LeaseMgr::upgradeLease4ExtendedInfo(), and isc::dhcp::LeaseMgr::upgradeLease6ExtendedInfo().

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◆ decodeSeparatedHexString()

void isc::util::str::decodeSeparatedHexString	(	const std::string &	hex_string,
		const std::string &	sep,
		std::vector< uint8_t > &	binary )

Converts a string of separated hexadecimal digits into a vector.

Octets may contain 1 or 2 digits. For example, using a colon for a separator all of the following are valid:

yy:yy:yy:yy:yy
y:y:y:y:y
y:yy:yy:y:y

If the decoded string doesn't match any of the supported formats, an exception is thrown.

Parameters

hex_string	Input string.
sep	character to use as a separator.
binary	Vector receiving converted string into binary.

Exceptions

isc::BadValue if the format of the input string is invalid.

Definition at line 163 of file str.cc.

References isc_throw.

Referenced by decodeColonSeparatedHexString(), and decodeFormattedHexString().

◆ dumpAsHex()

std::string isc::util::str::dumpAsHex	(	const uint8_t *	data,
		size_t	length )

Dumps a buffer of bytes as a string of hexadecimal digits.

Parameters

data	Pointer to the data to dump.
length	Number of bytes to dump. Caller should ensure the length does not exceed the buffer.

Definition at line 330 of file str.cc.

Referenced by isc::tcp::TcpStreamRequest::logFormatRequest(), and isc::dhcp::Lease4::toText().

◆ isPrintable() [1/2]

bool isc::util::str::isPrintable ( const std::string & content )

Check if a string is printable.

Parameters

content String to check for printable characters.

Returns: True if empty or contains only printable characters, False otherwise.

Definition at line 310 of file str.cc.

Referenced by isc::flex_option::FlexOptionImpl::logAction(), isc::flex_option::FlexOptionImpl::logSubAction(), and isc::dhcp::Option::toText().

◆ isPrintable() [2/2]

bool isc::util::str::isPrintable ( const std::vector< uint8_t > & content )

Check if a byte vector is printable.

Parameters

content Vector to check for printable characters.

Returns: True if empty or contains only printable characters, False otherwise.

Definition at line 320 of file str.cc.

◆ lowercase()

void isc::util::str::lowercase ( std::string & text )

Convert string to lowercase.

Parameters

text	String to be lower-cased.

Definition at line 134 of file str.cc.

References toLower().

Referenced by isc::http::BasicHttpAuthConfig::checkAuth(), isc::http::HttpHeader::getLowerCaseName(), isc::http::HttpHeader::getLowerCaseValue(), and isc::http::HttpHeader::isValueEqual().

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◆ quotedStringToBinary()

std::vector< uint8_t > isc::util::str::quotedStringToBinary ( const std::string & quoted_string )

Converts a string in quotes into vector.

A converted string is first trimmed. If a trimmed string is in quotes, the quotes are removed and the resulting string is copied into a vector. If the string is not in quotes, an empty vector is returned.

The resulting string is copied to a vector and returned.

This function is intended to be used by the server configuration parsers to convert string values surrounded with quotes into binary form.

Parameters

quoted_string String to be converted.

Returns: Vector containing converted string or empty string if input string didn't contain expected quote characters.

Definition at line 139 of file str.cc.

References trim().

Referenced by isc::dhcp::OptionDataParser::createOption(), isc::yang::AdaptorHost::quoteIdentifier(), and isc::dhcp::Host::setIdentifier().

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◆ seekTrimmed()

template<typename Iterator >

Iterator isc::util::str::seekTrimmed	(	Iterator const &	begin,
		Iterator	end,
		uint8_t const	trim_val )

Finds the "trimmed" end of a buffer.

Works backward from the end of the buffer, looking for the first character not equal to the trim value, and returns an iterator pointing to that position.

Parameters

begin	- Forward iterator pointing to the beginning of the buffer to trim.
end	- Forward iterator pointing to the untrimmed end of the buffer to trim.
trim_val	- byte value to trim off

Returns: Iterator pointing the first character from the end of the buffer not equal to the trim value.

Definition at line 65 of file str.h.

Referenced by isc::dhcp::OptionDataTypeUtil::readString(), isc::dhcp::OptionString::setValue(), and isc::dhcp::OptionString::unpack().

◆ tokens()

std::vector< std::string > isc::util::str::tokens	(	const std::string &	text,
		const std::string &	delim = " \t\n",
		bool	escape = false )

Split string into tokens.

Splits a string into tokens (the tokens being delimited by one or more of the delimiter characters) and returns the tokens in a vector. Adjacent delimiters are considered to be a single delimiter.

Special use cases are:

The empty string is considered to be zero tokens.
A string comprising nothing but delimiters is considered to be zero tokens.

The reasoning behind this is that the string can be thought of as having invisible leading and trailing delimiter characters. Therefore both cases reduce to a set of contiguous delimiters, which are considered a single delimiter (so getting rid of the string). Optional escape allows to escape delimiter characters (and only them and the escape character itself) using backslash.

We could use Boost for this, but this (simple) function eliminates one dependency in the code.

Parameters

text	String to be split. Passed by value as the internal copy is altered during the processing.
delim	Delimiter characters
escape	Use backslash to escape delimiter characters

Returns: Vector of tokens.

Definition at line 52 of file str.cc.

Referenced by isc::dhcp::OptionDataParser::createOption(), isc::dhcp::OptionDefParser::parse(), isc::dhcp::DnrInstance::parseDnrInstanceConfigData(), isc::flex_option::FlexOptionImpl::process(), and splitNamespace().

◆ toLower()

char isc::util::str::toLower ( char const chr )

Convert character to lowercase.

Used in lowercase() to pass as a parameter to std::transform(). The function std::tolower() can't be used as it takes an "int" as its parameter; this confuses the template expansion mechanism because dereferencing a string::iterator returns a char.

Parameters

chr	Character to be lower-cased.

Returns: Lowercase version of the input character.

Definition at line 129 of file str.cc.

Referenced by lowercase().

◆ toUpper()

char isc::util::str::toUpper ( char const chr )

Convert character to uppercase.

Used in uppercase() to pass as a parameter to std::transform(). The function std::toupper() can't be used as it takes an "int" as its parameter; this confuses the template expansion mechanism because dereferencing a string::iterator returns a char.

Parameters

chr	Character to be upper-cased.

Returns: Uppercase version of the input character.

Definition at line 119 of file str.cc.

Referenced by uppercase().

◆ trim()

std::string isc::util::str::trim ( const std::string & input )

Trim leading and trailing spaces.

Returns a copy of the input string but with any leading or trailing spaces or tabs removed.

Parameters

input Input string to modify.

Returns: String with leading and trailing spaces removed.

Definition at line 32 of file str.cc.

Referenced by isc::dhcp::ClientClasses::ClientClasses(), isc::dhcp::OptionDescriptor::addClientClass(), isc::http::BasicHttpAuthConfig::checkAuth(), isc::dhcp::OptionDefinition::optionFactory(), isc::db::DatabaseConnection::parse(), isc::hooks::HooksLibrariesParser::parse(), isc::dhcp::DnrInstance::parseDnrInstanceConfigData(), isc::log::MessageReader::processLine(), quotedStringToBinary(), isc::util::file::Path::replaceExtension(), isc::util::file::Path::replaceParentPath(), isc::dhcp::Option4ClientFqdnImpl::setDomainName(), isc::dhcp::Option6ClientFqdnImpl::setDomainName(), isc::dhcp::CfgDUID::setIdentifier(), isc::ha::HAConfig::PeerConfig::setName(), isc::ha::HAConfig::setThisServerName(), and isc::dhcp::CfgIface::use().

◆ uppercase()

void isc::util::str::uppercase ( std::string & text )

Convert string to uppercase.

Parameters

text	String to be upper-cased.

Definition at line 124 of file str.cc.

References toUpper().

Referenced by sentinel().

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Classes

Typedefs

Functions

Typedef Documentation

◆ StringSanitizerImplPtr

◆ StringSanitizerPtr

Function Documentation

◆ decodeColonSeparatedHexString()

◆ decodeFormattedHexString()

◆ decodeSeparatedHexString()

◆ dumpAsHex()

◆ isPrintable() [1/2]

◆ isPrintable() [2/2]

◆ lowercase()

◆ quotedStringToBinary()

◆ seekTrimmed()

◆ tokens()

◆ toLower()

◆ toUpper()

◆ trim()

◆ uppercase()