#include <Tokenizer.h>

Collaboration diagram for Parser::Tokenizer:

[legend]

Public Member Functions
	Tokenizer (const SBuf &inBuf)

SBuf	buf () const
	yet unparsed data More...

SBuf::size_type	parsedSize () const
	number of parsed bytes, including skipped ones More...

bool	atEnd () const
	whether the end of the buffer has been reached More...

const SBuf &	remaining () const
	the remaining unprocessed section of buffer More...

void	reset (const SBuf &newBuf)
	reinitialize processing for a new buffer More...

bool	token (SBuf &returnedToken, const CharacterSet &delimiters)

bool	prefix (SBuf &returnedToken, const CharacterSet &tokenChars, SBuf::size_type limit=SBuf::npos)

bool	suffix (SBuf &returnedToken, const CharacterSet &tokenChars, SBuf::size_type limit=SBuf::npos)

bool	skipSuffix (const SBuf &tokenToSkip)

bool	skip (const SBuf &tokenToSkip)

bool	skip (const char tokenChar)

bool	skipOne (const CharacterSet &discardables)

SBuf::size_type	skipAll (const CharacterSet &discardables)

void	skipRequired (const char *description, const SBuf &tokenToSkip)

bool	skipOneTrailing (const CharacterSet &discardables)

SBuf::size_type	skipAllTrailing (const CharacterSet &discardables)

bool	int64 (int64_t &result, int base=0, bool allowSign=true, SBuf::size_type limit=SBuf::npos)

SBuf	prefix (const char *description, const CharacterSet &tokenChars, SBuf::size_type limit=SBuf::npos)

int64_t	udec64 (const char *description, SBuf::size_type limit=SBuf::npos)
	int64() wrapper but limited to unsigned decimal integers (for now) More...

Protected Member Functions
SBuf	consume (const SBuf::size_type n)
	convenience method: consumes up to n bytes, counts, and returns them More...

SBuf::size_type	success (const SBuf::size_type n)
	convenience method: consume()s up to n bytes and returns their count More...

SBuf	consumeTrailing (const SBuf::size_type n)
	convenience method: consumes up to n last bytes and returns them More...

SBuf::size_type	successTrailing (const SBuf::size_type n)
	convenience method: consumes up to n last bytes and returns their count More...

void	undoParse (const SBuf &newBuf, SBuf::size_type cParsed)
	reset the buffer and parsed stats to a saved checkpoint More...

Private Attributes
SBuf	buf_
	yet unparsed input More...

SBuf::size_type	parsed_
	bytes successfully parsed, including skipped More...

Detailed Description

Lexical processor to tokenize a buffer.

Allows arbitrary delimiters and token character sets to be provided by callers.

All methods start from the beginning of the input buffer. Methods returning true consume bytes from the buffer. Methods returning false have no side-effects.

Definition at line 29 of file Tokenizer.h.

Constructor & Destructor Documentation

◆ Tokenizer()

Parser::Tokenizer::Tokenizer ( const SBuf & inBuf )

inlineexplicit

Definition at line 32 of file Tokenizer.h.

Member Function Documentation

◆ atEnd()

bool Parser::Tokenizer::atEnd ( ) const

inline

Definition at line 41 of file Tokenizer.h.

References buf_, and SBuf::isEmpty().

Referenced by AnyP::Uri::Encode(), ProxyProtocol::IntegerToFieldType(), Ip::NfMarkConfig::Parse(), and Security::PeerOptions::parseOptions().

◆ buf()

SBuf Parser::Tokenizer::buf ( ) const

inline

Definition at line 35 of file Tokenizer.h.

References buf_.

Referenced by getNfmark(), and TestTokenizer::testTokenizerInt64().

◆ consume()

SBuf Parser::Tokenizer::consume ( const SBuf::size_type n )

protected

Definition at line 22 of file Tokenizer.cc.

References buf_, SBuf::consume(), debugs, SBuf::length(), and parsed_.

◆ consumeTrailing()

SBuf Parser::Tokenizer::consumeTrailing ( const SBuf::size_type n )

protected

Definition at line 40 of file Tokenizer.cc.

References SBuf::consume(), debugs, and SBuf::npos.

◆ int64()

bool Parser::Tokenizer::int64	(	int64_t &	result,
		int	base = `0`,
		bool	allowSign = `true`,
		SBuf::size_type	limit = `SBuf::npos`
	)

Extracts an unsigned int64_t at the beginning of the buffer.

strtoll(3)-alike function: tries to parse unsigned 64-bit integer at the beginning of the parse buffer, in the base specified by the user or guesstimated; consumes the parsed characters.

Parameters

result	Output value. Not touched if parsing is unsuccessful.
base	Specify base to do the parsing in, with the same restrictions as strtoll. Defaults to 0 (meaning guess)
allowSign	Whether to accept a '+' or '-' sign prefix.
limit	Maximum count of characters to convert.

Returns: whether the parsing was successful

Definition at line 238 of file Tokenizer.cc.

References INT64_MAX, INT64_MIN, SBuf::length(), SBuf::rawContent(), xisalpha, xisdigit, and xisupper.

Referenced by getNfmark(), ProxyProtocol::IntegerToFieldType(), Security::PeerOptions::parseOptions(), and TestTokenizer::testTokenizerInt64().

◆ parsedSize()

SBuf::size_type Parser::Tokenizer::parsedSize ( ) const

inline

Definition at line 38 of file Tokenizer.h.

References parsed_.

Referenced by ProxyProtocol::Parse().

◆ prefix() [1/2]

SBuf Parser::Tokenizer::prefix	(	const char *	description,
		const CharacterSet &	tokenChars,
		SBuf::size_type	limit = `SBuf::npos`
	)

prefix() wrapper but throws InsufficientInput if input contains nothing but the prefix (i.e. if the prefix is not "terminated")

Definition at line 100 of file Tokenizer.cc.

References TexcHere, and ToSBuf().

◆ prefix() [2/2]

bool Parser::Tokenizer::prefix	(	SBuf &	returnedToken,
		const CharacterSet &	tokenChars,
		SBuf::size_type	limit = `SBuf::npos`
	)

Extracts all sequential permitted characters up to an optional length limit.

Note that Tokenizer cannot tell whether the prefix will continue when/if more input data becomes available later.

Return values

true	one or more characters were found, the sequence (string) is placed in returnedToken
false	no characters from the permitted set were found

Definition at line 79 of file Tokenizer.cc.

References debugs, CharacterSet::name, and SBuf::npos.

Referenced by AnyP::Uri::Encode(), TestTokenizer::testTokenizerPrefix(), and TestTokenizer::testTokenizerSkip().

◆ remaining()

const SBuf & Parser::Tokenizer::remaining ( ) const

inline

Definition at line 44 of file Tokenizer.h.

References buf_.

Referenced by AnyP::Uri::Encode(), Auth::SchemesConfig::expand(), ProxyProtocol::Parse(), TestTokenizer::testTokenizerPrefix(), TestTokenizer::testTokenizerSkip(), and TestTokenizer::testTokenizerSuffix().

◆ reset()

void Parser::Tokenizer::reset ( const SBuf & newBuf )

inline

Definition at line 47 of file Tokenizer.h.

References undoParse().

◆ skip() [1/2]

bool Parser::Tokenizer::skip ( const char tokenChar )

skips a given single character

Returns: whether the character was skipped

Definition at line 200 of file Tokenizer.cc.

References debugs.

◆ skip() [2/2]

bool Parser::Tokenizer::skip ( const SBuf & tokenToSkip )

skips a given character sequence (string)

Returns: whether the exact character sequence was found and skipped

Definition at line 189 of file Tokenizer.cc.

References debugs, and SBuf::length().

Referenced by AnyP::Uri::Encode(), ProxyProtocol::IntegerToFieldType(), ProxyProtocol::Parse(), ProxyProtocol::One::Parse(), Ip::NfMarkConfig::Parse(), and TestTokenizer::testTokenizerSkip().

◆ skipAll()

SBuf::size_type Parser::Tokenizer::skipAll ( const CharacterSet & discardables )

Skips all sequential characters from the set, in any order.

Returns: the number of skipped characters

Definition at line 137 of file Tokenizer.cc.

References debugs, and CharacterSet::name.

Referenced by TestTokenizer::testTokenizerSkip().

◆ skipAllTrailing()

SBuf::size_type Parser::Tokenizer::skipAllTrailing ( const CharacterSet & discardables )

Removes all sequential trailing characters from the set, in any order.

Returns: the number of characters removed

Definition at line 222 of file Tokenizer.cc.

References debugs, CharacterSet::name, and SBuf::npos.

Referenced by Auth::SchemesConfig::expand().

◆ skipOne()

bool Parser::Tokenizer::skipOne ( const CharacterSet & discardables )

Skips a single character from the set.

Returns: whether a character was skipped

Definition at line 161 of file Tokenizer.cc.

References debugs, and CharacterSet::name.

Referenced by ProxyProtocol::FieldNameToFieldType(), and TestTokenizer::testTokenizerSkip().

◆ skipOneTrailing()

bool Parser::Tokenizer::skipOneTrailing ( const CharacterSet & discardables )

Removes a single trailing character from the set.

Returns: whether a character was removed

Definition at line 211 of file Tokenizer.cc.

References debugs, and CharacterSet::name.

Referenced by TestTokenizer::testTokenizerSuffix().

◆ skipRequired()

void Parser::Tokenizer::skipRequired	(	const char *	description,
		const SBuf &	tokenToSkip
	)

skips a given character sequence (string); does nothing if the sequence is empty

Exceptions

exception on mismatching prefix or InsufficientInput

Definition at line 149 of file Tokenizer.cc.

References Here, SBuf::isEmpty(), SBuf::startsWith(), and ToSBuf().

◆ skipSuffix()

bool Parser::Tokenizer::skipSuffix ( const SBuf & tokenToSkip )

skips a given suffix character sequence (string) Operates on the trailing end of the buffer.

Note that Tokenizer cannot tell whether the buffer will gain more data when/if more input becomes available later.

Returns: whether the exact character sequence was found and skipped

Definition at line 172 of file Tokenizer.cc.

References debugs, SBuf::length(), and SBuf::npos.

Referenced by TestTokenizer::testTokenizerSuffix().

◆ success()

SBuf::size_type Parser::Tokenizer::success ( const SBuf::size_type n )

protected

Definition at line 33 of file Tokenizer.cc.

◆ successTrailing()

SBuf::size_type Parser::Tokenizer::successTrailing ( const SBuf::size_type n )

protected

Definition at line 55 of file Tokenizer.cc.

◆ suffix()

bool Parser::Tokenizer::suffix	(	SBuf &	returnedToken,
		const CharacterSet &	tokenChars,
		SBuf::size_type	limit = `SBuf::npos`
	)

Extracts all sequential permitted characters up to an optional length limit. Operates on the trailing end of the buffer.

Note that Tokenizer cannot tell whether the buffer will gain more data when/if more input becomes available later.

Return values

true	one or more characters were found, the sequence (string) is placed in returnedToken
false	no characters from the permitted set were found

Definition at line 117 of file Tokenizer.cc.

References SBuf::consume(), SBuf::rbegin(), and SBuf::rend().

Referenced by TestTokenizer::testTokenizerSuffix().

◆ token()

bool Parser::Tokenizer::token	(	SBuf &	returnedToken,
		const CharacterSet &	delimiters
	)

Basic strtok(3): Skips all leading delimiters (if any), extracts all characters up to the next delimiter (a token), and skips all trailing delimiters (at least one must be present).

Want to extract delimiters? Use prefix() instead.

Note that Tokenizer cannot tell whether the trailing delimiters will continue when/if more input data becomes available later.

Returns: true if found a non-empty token followed by a delimiter

Definition at line 61 of file Tokenizer.cc.

References DBG_DATA, debugs, CharacterSet::name, and SBuf::npos.

Referenced by Auth::SchemesConfig::expand(), and TestTokenizer::testTokenizerToken().

◆ udec64()

int64_t Parser::Tokenizer::udec64	(	const char *	description,
		SBuf::size_type	limit = `SBuf::npos`
	)

Definition at line 316 of file Tokenizer.cc.

References TexcHere, and ToSBuf().

◆ undoParse()

void Parser::Tokenizer::undoParse	(	const SBuf &	newBuf,
		SBuf::size_type	cParsed
	)

inlineprotected

Definition at line 173 of file Tokenizer.h.

References buf_, and parsed_.

Referenced by reset().

Member Data Documentation

◆ buf_

SBuf Parser::Tokenizer::buf_

private

Definition at line 176 of file Tokenizer.h.

Referenced by atEnd(), buf(), consume(), remaining(), and undoParse().

◆ parsed_

SBuf::size_type Parser::Tokenizer::parsed_

private

Definition at line 177 of file Tokenizer.h.

Referenced by consume(), parsedSize(), and undoParse().

The documentation for this class was generated from the following files:

src/parser/Tokenizer.h
src/parser/Tokenizer.cc

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Public Member Functions

Protected Member Functions

Private Attributes

Detailed Description

Constructor & Destructor Documentation

◆ Tokenizer()

Member Function Documentation

◆ atEnd()

◆ buf()

◆ consume()

◆ consumeTrailing()

◆ int64()

◆ parsedSize()

◆ prefix() [1/2]

◆ prefix() [2/2]

◆ remaining()

◆ reset()

◆ skip() [1/2]

◆ skip() [2/2]

◆ skipAll()

◆ skipAllTrailing()

◆ skipOne()

◆ skipOneTrailing()

◆ skipRequired()

◆ skipSuffix()

◆ success()

◆ successTrailing()

◆ suffix()

◆ token()

◆ udec64()

◆ undoParse()

Member Data Documentation

◆ buf_

◆ parsed_

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