class for reading and evaluating configuration files. More...

Public Member Functions
	OFConfigFile (FILE *infile, unsigned int maxLevel=OFConfigFile_MaxLevel, char commentChar=OFConfigFile_CommentChar, OFBool orderedMode=OFFalse)
	constructor. More...

virtual	~OFConfigFile ()
	destructor

void	loadFile (FILE *infile)
	load configuration file More...

const char *	get_keyword (unsigned int level)
	gets the name of the keyword at the specified level in the cursor path. More...

const char *	get_value ()
	gets the value for the current entry (level 0 keyword). More...

OFBool	get_bool_value (OFBool defaultvalue)
	gets the value for the current entry and interprets it as a boolean value. More...

OFBool	section_valid (unsigned int level) const
	checks if the cursor points to a valid entry in the config data tree up to the the specified level. More...

void	set_section (unsigned int level, const char *key)
	sets cursor to the entry with keyword "key" at the given level. More...

void	first_section (unsigned int level)
	sets cursor to the first entry at the given level (without changing the cursor position at higher levels). More...

void	next_section (unsigned int level)
	sets cursor to the next entry at the given level (without changing the cursor position at higher levels). More...

void	save_cursor ()
	puts the current cursor position on a cursor stack.

void	restore_cursor ()
	restores a previously stored cursor position from the cursor stack.

void	select_section (const char key1, const char key2=NULL, const char *key3=NULL)
	sets the cursor to a different section. More...

const char *	get_entry (const char *key0)
	sets the cursor to the given level 0 keyword and returns the string value assigned to this keyword. More...

void	print (STD_NAMESPACE ostream &out)
	print the content of the configuration to an output stream More...

Private Member Functions
char	read_char (FILE *infile)
	reads the next character from the input file, maintains the current line number and filters out comments. More...

char	read_keywordchar (FILE *infile)
	reads the next non-whitespace character from the input file and returns as uppercase character. More...

void	read_entry (FILE *infile)
	reads a complete entry from the config file. More...

void	store_char (char c)
	writes a character to the string buffer maintained in "buffer". More...

	OFConfigFile (const OFConfigFile &)
	private undefined copy constructor

OFConfigFile &	operator= (const OFConfigFile &)
	private undefined assignment operator

Private Attributes
OFStack< OFConfigFileCursor >	stack_
	stack of cursor positions that can be saved and restored

OFConfigFileCursor	cursor_
	current cursor position

OFConfigFileNode *	anchor_
	anchor to data tree

int	isnewline_
	flag indicating whether newline during file read

int	crfound_
	flag indicating whether CR was read during file read

char *	buffer_
	buffer during file read

size_t	bufptr_
	index into buffer during file read

long	bufsize_
	buffer size during file read

unsigned int	maxLevel_
	depth of tree, i.e. number of entries in array_

char	commentChar_
	character starting comment lines

OFBool	orderedMode_
	mode flag for reading configuration file. More...

Detailed Description

class for reading and evaluating configuration files.

An object of this class reads upon construction a text config file and offers methods allowing to browse the configuration data

Constructor & Destructor Documentation

OFConfigFile::OFConfigFile	(	FILE *	infile,
		unsigned int	maxLevel = `OFConfigFile_MaxLevel`,
		char	commentChar = `OFConfigFile_CommentChar`,
		OFBool	orderedMode = `OFFalse`
	)

constructor.

Parameters

infile	file from which the configuration data is to be read.
maxLevel	depth of the tree maintained in this config file, default 2
commentChar	character to start comment lines, default '#'
orderedMode	mode flag for processing configuration files. See documentation of member variable orderedMode_

Member Function Documentation

void OFConfigFile::first_section ( unsigned int level )

inline

sets cursor to the first entry at the given level (without changing the cursor position at higher levels).

Cursor must be valid at the level higher than the one specified. If no section is found the cursor becomes invalid at the specified level. The cursor always becomes invalid at all levels lower than specified.

Parameters

level cursor level

OFBool OFConfigFile::get_bool_value ( OFBool defaultvalue )

gets the value for the current entry and interprets it as a boolean value.

The keywords "yes", "no", "on", "off", "1", "0", "true" and false" are recognised in upper, lower and mixed case. If the value is different from any recognised keyword, the specified default is returned Cursor must point to a valid entry (i.e. be valid at level 0)

Parameters

defaultvalue default to be returned if no keyword is recognised of if the cursor is invalid.

Returns: boolean value.

const char* OFConfigFile::get_entry ( const char * key0 )

sets the cursor to the given level 0 keyword and returns the string value assigned to this keyword.

Parameters

key0	level 0 keyword

Returns: value string if found, NULL otherwise

const char* OFConfigFile::get_keyword ( unsigned int level )

gets the name of the keyword at the specified level in the cursor path.

Cursor must be valid at the specified level.

Parameters

level cursor level

Returns: keyword if valid, NULL otherwise.

const char* OFConfigFile::get_value ( )

gets the value for the current entry (level 0 keyword).

Cursor must point to a valid entry (i.e. be valid at level 0)

Returns: value if valid, NULL otherwise.

void OFConfigFile::loadFile ( FILE * infile )

load configuration file

Parameters

infile configuration file, must already be open for reading.

void OFConfigFile::next_section ( unsigned int level )

inline

sets cursor to the next entry at the given level (without changing the cursor position at higher levels).

Cursor must be valid at the level specified. If no section is found the cursor becomes invalid at the specified level. The cursor always becomes invalid at all levels lower than specified.

Parameters

level cursor level

void OFConfigFile::print ( STD_NAMESPACE ostream & out )

print the content of the configuration to an output stream

Parameters

out	output stream to print to

char OFConfigFile::read_char ( FILE * infile )

private

reads the next character from the input file, maintains the current line number and filters out comments.

Parameters

infile the file to be read

Returns: next character

void OFConfigFile::read_entry ( FILE * infile )

private

reads a complete entry from the config file.

An entry can either be a section heading or an entry of the form key=value. The entry is inserted into the config data tree managed by this object.

Parameters

infile the file to be read

char OFConfigFile::read_keywordchar ( FILE * infile )

private

reads the next non-whitespace character from the input file and returns as uppercase character.

Parameters

infile the file to be read

Returns: next non-whitespace character

OFBool OFConfigFile::section_valid ( unsigned int level ) const

inline

checks if the cursor points to a valid entry in the config data tree up to the the specified level.

Parameters

level tree level (0 for leaf)

Returns: OFTrue if valid at the specified level.

void OFConfigFile::select_section	(	const char *	key1,
		const char *	key2 = `NULL`,
		const char *	key3 = `NULL`
	)

sets the cursor to a different section.

This "shortcut" method allows to specify multiple section levels at the same time. The cursor becomes invalid when the section is not found or if parameters for more level then present in the tree are specified.

Parameters

key1	level 1 section key, i.e. [KEY]
key2	level 2 section key, i.e. [[KEY]]. If omitted, section 2 remains unchanged.
key2	level 3 section key, i.e. [[[KEY]]]. If omitted, section 3 remains unchanged.

void OFConfigFile::set_section	(	unsigned int	level,
		const char *	key
	)

inline

sets cursor to the entry with keyword "key" at the given level.

Cursor must be valid at the level higher than the one specified. If the keyword exists more than once, the first occurance is found. If the keyword does not exist, the cursor becomes invalid at the specified level. The cursor always becomes invalid at all levels lower than specified.

Parameters

level	cursor level
key	key value

void OFConfigFile::store_char ( char c )

private

writes a character to the string buffer maintained in "buffer".

Automatically resizes buffer if necessary.

Parameters

c	character to be stored

Member Data Documentation

OFBool OFConfigFile::orderedMode_

private

mode flag for reading configuration file.

If false, new entries to the tree containing the configuration file are just appended and not sorted. This allows multiple entries with the same keyword to be present, only the first of which will be found by search-by-keyword methods such as set_section, select_section or get_entry. In ordered mode, the tree is maintained in sorted order and a new entry will replace an older entry with identical keyword. This permits multiple configuration files to "overlay" each other but is somewhat slower when reading the configuration file.

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

ofstd/include/dcmtk/ofstd/ofconfig.h

Public Member Functions

Private Member Functions

Private Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation