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// Pretty-printing utility -*- c++ -*-
#ifndef PRINTER_H_
# define PRINTER_H_
# ifdef __GNUC__
# pragma interface
# endif // __GNUC__
# include "typedefs.h"
# include "StringBuffer.h"
# include <stdio.h>
/** @file Printer.h
* Pretty-printing utility (output to character strings and file streams)
*/
/* Copyright 1999-2002 Marko Mkel (msmakela@tcs.hut.fi).
This file is part of MARIA, a reachability analyzer and model checker
for high-level Petri nets.
MARIA is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
MARIA is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
The GNU General Public License is often shipped with GNU software, and
is generally kept in a file called COPYING or LICENSE. If you do not
have a copy of the license, write to the Free Software Foundation,
59 Temple Place, Suite 330, Boston, MA 02111 USA. */
/** Pretty-printing utility */
class Printer
{
public:
/** Radix for displaying numbers */
enum Radix { Octal, Hexadecimal, Decimal };
/** Constructor
* @param width maximum width of output in columns
* @param radix radix for displaying numbers
*/
Printer (unsigned width = 80,
enum Radix radix = Decimal) :
myWidth (width), myRadix (radix),
myNesting (0), myColumn (0), myBuffer (), myBOL (0),
myOutput (0), myStream (stderr) {}
private:
/** Copy constructor */
Printer (const class Printer& old);
/** Assignment operator */
class Printer& operator= (const class Printer& old);
public:
/** Destructor */
~Printer () { finish (); }
/** Set the maximum width of the output */
void setWidth (unsigned width) { myWidth = width; }
/** Get the maximum width of the output */
unsigned getWidth () const { return myWidth; }
/** Set the radix */
void setRadix (enum Radix radix) { myRadix = radix; }
/** Get the radix */
enum Radix getRadix () const { return myRadix; }
/** Set the function to be called at beginning of line */
void setBOL (unsigned (*bol) (void)) { myBOL = bol; }
/** Set the output buffer (NULL=myStream) */
void setOutput (class StringBuffer* output) { myOutput = output; }
/** Set the output stream */
void setOutput (FILE* stream) { myStream = stream; }
/** Get the output stream */
FILE* getOutput () { return myStream; }
/** Increment the nesting level */
const class Printer& operator++ () const { myNesting++; return *this; }
/** Increment the nesting level */
const class Printer& operator++ (int) const { myNesting++; return *this; }
/** Decrement the nesting level */
const class Printer& operator-- () const { myNesting--; return *this; }
/** Decrement the nesting level */
const class Printer& operator-- (int) const { myNesting--; return *this; }
/** Finish printing (add a newline if necessary) */
void finish () const;
/** Add an unconditional line break */
void linebreak () const;
/** Break the line if necessary
* @param margin safety margin required
*/
void linebreak (unsigned margin) const {
if (myOutput) return;
if (myWidth && myColumn + margin >= myWidth)
linebreak ();
else if (!myColumn && myBOL && myStream == stderr)
myColumn = (*myBOL) ();
}
/** Display a delimiter character
* @param character delimiter character to be displayed
* @return *this
*/
const class Printer& delimiter (char character) const;
/** Determine whether a name needs quotes
* @param name the name
* @return true if print () would enclose the name in quotes
*/
static bool isPrintable (const char* name);
/** Display raw text
* @param string NUL-terminated string to be displayed
*/
void printRaw (const char* string) const;
/** Display quoted text
* @param string NUL-terminated string to be displayed in double quotes
*/
void printQuoted (const char* string) const;
/** Display a state number
* @param state state number to be displayed
*/
void printState (card_t state) const;
/** Display a strongly connected component number
* @param comp component number to be displayed
*/
void printComponent (card_t comp) const;
/** Display an unsigned prefixed with a string
* @param prefix prefix to be displayed
* @param number number to be displayed
*/
void printNumber (const char* prefix, card_t number) const;
/** Display a boolean value
* @param value value to be displayed
*/
void print (bool value) const;
/** Display a cardinality
* @param number number to be displayed
*/
void print (card_t number) const;
/** Display a signed number
* @param number number to be displayed
*/
void print (int_t number) const;
/** Display a name
* @param name NUL-terminated name to be displayed
*/
void print (const char* name) const;
/** Display a character string in double quotes
* @param string characters to be displayed
* @param length length of the string
*/
void print (const char* string, unsigned length) const;
/** Display a character in single quotes
* @param character character to be displayed
*/
void print (char_t character) const;
private:
/** maximum width of output in columns */
unsigned myWidth;
/** radix for displaying numbers */
enum Radix myRadix;
/** nesting depth of output */
mutable unsigned myNesting;
/** current output column */
mutable unsigned myColumn;
/** buffer for building up strings */
mutable class StringBuffer myBuffer;
/** function to be called at beginning of line (NULL=none) */
unsigned (*myBOL) (void);
/** output buffer (NULL=myStream) */
class StringBuffer* myOutput;
/** output stream (or stderr) */
FILE* myStream;
};
#endif // PRINTER_H_
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