NetlistTokenizer Class Reference

NetlistTokenizer is a simple string tokenizer, which usings C strtok () function from. More...

#include <NetlistParser.h>

List of all members.

Public Member Functions
	NetlistTokenizer (const char *fileName, const char *delim, const char *comments)
	Constructor.
const std::string	nextToken ()
	returns the next token from the file
bool	hasMoreTokens () const
Private Member Functions
bool	isCommentBegin () const
char *	getNextLine ()
	read next line from the file and return it as a C string
char *	readNextToken ()
	read next token as a C string
Private Attributes
std::ifstream	ifs
	correct way to use is to first check if hasMoreTokens and then call nextToken
const char *	delim
	what characters mark end of a token
const char *	comments
	string representing beginning of a line comment
char *	linePtr
	current line read from the file
char *	nextTokPtr
	ptr to next token
char *	currTokPtr
	ptr to current token, returned on a call to nextToken ()

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Detailed Description

NetlistTokenizer is a simple string tokenizer, which usings C strtok () function from.

cstring

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Constructor & Destructor Documentation

NetlistTokenizer::NetlistTokenizer	(	const char *	fileName,
		const char *	delim,
		const char *	comments
	)			[inline]

Constructor.

Parameters:

	fileName,:	the file to read from
	delim,:	a string containing characters that mark end of a token
	comments,:	a string that contains beginning of a comment

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Member Function Documentation

char* NetlistTokenizer::getNextLine

(

)

[inline, private]

read next line from the file and return it as a C string

bool NetlistTokenizer::hasMoreTokens

(

)

const [inline]

bool NetlistTokenizer::isCommentBegin

(

)

const [inline, private]

Returns:

true if nextTokPtr starts with comment pattern

const std::string NetlistTokenizer::nextToken

(

)

[inline]

returns the next token from the file

char* NetlistTokenizer::readNextToken

(

)

[inline, private]

read next token as a C string

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Member Data Documentation

const char* NetlistTokenizer::comments [private]

string representing beginning of a line comment

char* NetlistTokenizer::currTokPtr [private]

ptr to current token, returned on a call to nextToken ()

const char* NetlistTokenizer::delim [private]

what characters mark end of a token

std::ifstream NetlistTokenizer::ifs [private]

correct way to use is to first check if hasMoreTokens and then call nextToken

need to read one token ahead so because hasMoreTokens is called before nextToken

basic algorithm

initially currTokPtr = NULL, nextTokPtr = nextTokenInt

In nextToken return string at currTokPtr currTokPtr = nextTokPtr nextTokPtr = read next token

algorithm for reading next token read next token (with NULL) while next token is null or beginning of comment { read next line (break out the loop if file has ended) read first token } create a string and return

things to check for

• end of file, reading error (in this case getNextLine() should return NULL)

initialization:

• initially nextTokPtr should be NULL and this fine because reading nextTok with null should return null; file handle for input stream

char* NetlistTokenizer::linePtr [private]

current line read from the file

char* NetlistTokenizer::nextTokPtr [private]

ptr to next token

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

• NetlistParser.h