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/*
* mystring.h: Part of GNU CSSC.
*
*
* Copyright (C) 1997,1998,1999,2001 Free Software Foundation, Inc.
*
* This program 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 of the License, or
* (at your option) any later version.
*
* This program 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
*
* CSSC was originally Based on MySC, by Ross Ridge, which was
* placed in the Public Domain.
*
*
* Defines the class mystring.
*
* $Id: mystring.h,v 1.17 2001/09/29 19:39:41 james_youngman Exp $
*
*/
#ifndef CSSC__MYSTRING_H__
#define CSSC__MYSTRING_H__
// If we have the header file <string>, then
// use that rather than mystring.
#ifdef HAVE_STRING
#define USE_STANDARD_STRING
#endif
#ifdef USE_STANDARD_STRING
#include <string>
typedef STD_NAMESPACE string mystring;
#else /* Use our own "mystring". */
#ifdef __GNUC__
#pragma interface
#endif
#define STR_OFFSET (offsetof(ptr, str))
#define STR_PTR(str) ((ptr *)((str) - STR_OFFSET))
/* This is a very simple string class. Its purpose is mainly to
simplify the allocation of strings. */
class mystring
{
class MyStrRep; // nested class.
class ModifiableReference;
friend class MyStrRep; // nested class.
friend class ModifiableReference;
MyStrRep *rep;
public:
typedef unsigned long size_type;
typedef char charT;
static const size_type npos = static_cast<size_type>(-1);
// Constructors...
mystring();
mystring(const charT*);
mystring(const charT*, size_type); // first N characters.
mystring(const mystring&);
// Assignment
mystring& operator=(const mystring&);
mystring& assign(const mystring&, size_type pos);
// Observers
bool valid() const;
bool empty() const;
size_type length() const;
// Data access
// IRIX's CC seems to be unable to cope with functions disambiguated only
// by constness. It says "error(3392): cannot overload functions
// distinguished by return type alone". It's remotely possible that
// some Autoconf black magic has perpetrated #define const /*nothing*/
// and that's what's causing the problem. If so, I shall be cross...:-)
charT at(size_type) const;
ModifiableReference at(size_type);
// Casts etc.
const charT *c_str() const;
// Slicing...
mystring substr(size_type first, size_type last) const;
// Operators...
mystring operator+(const mystring&) const;
bool operator==(const mystring&) const;
bool operator!=(const mystring&) const;
// Searching..
size_type find_last_of(charT) const;
private:
class ModifiableReference
{
mystring &s;
size_type pos;
public:
ModifiableReference(mystring& sref, size_type i) : s(sref), pos(i) { }
charT& operator=(charT ch);
operator char() const;
};
int compare(const mystring &) const;
// Copy management.
void prepare_for_writing();
};
#endif /* USE_STANDARD_STRING */
#endif /* __MYSTRING_H__ */
/* Local variables: */
/* mode: c++ */
/* End: */
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