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// Extendible reusable string buffer -*- c++ -*-
#ifndef STRINGBUFFER_H_
# define STRINGBUFFER_H_
# ifdef __GNUC__
# pragma interface
# endif // __GNUC__
/** @file StringBuffer.h
* Extendible reusable string buffer
*/
/* Copyright 1999-2001 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. */
/** Extendible reusable string buffer */
class StringBuffer
{
public:
/** Constructor */
StringBuffer ();
/** Copy constructor */
StringBuffer (const class StringBuffer& old);
/** Assignment operator */
class StringBuffer& operator= (const class StringBuffer& old);
/** Destructor */
~StringBuffer ();
/** Create a copy of the string */
char* copy () const;
/** Get current string length */
unsigned getLength () const { return myLength; }
/** Get maximum string length */
unsigned getMaxLength () const { return myMaxLength; }
/** Get the string buffer */
const char* getString () const { return myString; }
/** Assignment operator
* @param string NUL-terminated string to be assigned
*/
class StringBuffer& operator= (const char* string);
/**
* Guarantee that getMaxLength () <= length and clear the string.
* @param length length of string requested
* @return pointer to string buffer (relocated when necessary)
*/
char* create (unsigned length);
/**
* Guarantee that getMaxLength () - getLength () <= length
* and set myLength += length.
* @param length amount of additional space requested
* @return pointer to string buffer (relocated when necessary)
*/
char* extend (unsigned length);
/**
* Append a NUL-terminated string to the buffer.
* @param string string to be appended
*/
void append (const char* string);
/**
* Append a string buffer
* @param buf string to be appended
*/
void append (const class StringBuffer& buf);
/**
* Append an unsigned number to the buffer.
* @param num number to be appended
*/
void append (unsigned num);
/**
* Append a signed number to the buffer.
* @param num number to be appended
*/
void append (signed num);
/**
* Append a number of a character to the buffer
* @param c character to be appended
* @param num number of characters to append
*/
void append (char c, unsigned num);
/**
* Append indentation spaces to the buffer.
* @param num indentation level
*/
void indent (unsigned num) {
append (' ', num);
}
/**
* Append a number of opening parentheses to the buffer.
* @param num number of parentheses to add
*/
void openParen (unsigned num) {
append ('(', num);
}
/**
* Append a number of closing parentheses to the buffer.
* @param num number of parentheses to add
*/
void closeParen (unsigned num) {
append (')', num);
}
/**
* Remove a number of characters from the buffer.
* @param num number of characters to remove
*/
void chop (unsigned num) {
myString[myLength -= num] = 0;
}
/**
* Translate all characters in the buffer except [0-9A-Za-z_] to
* an underscore followed by a two-digit hexadecimal code.
* @param offset offset from which to start escaping
*/
void escape (unsigned offset = 0);
private:
/** The string buffer */
char* myString;
/** Current string length, excluding the terminating NULL character */
unsigned myLength;
/** Maximum string length, excluding the terminating NULL character */
unsigned myMaxLength;
};
#endif // STRINGBUFFER_H_
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