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/* -*- Mode: C++ -*-
* Worldvisions Weaver Software:
* Copyright (C) 2005 Net Integration Technologies, Inc.
*
* Implementation of an efficient lookup for a set characters.
*
* It is, however, a little space intensive, but you should statically
* create them in your functions, and then they won't be so bad.
*/
#ifndef __WVSTRINGMASK_H
#define __WVSTRINGMASK_H
#include "wvstring.h"
/**
* A class used to provide a masked lookup for characters in a string.
*/
class WvStringMask
{
public:
/**
* Create a WvStringMask out of a WvString. When looked up,
* characters in 's' will return true.
*/
WvStringMask(WvStringParm s = WvString::null);
WvStringMask(char c);
/**
* Look up a character. This will return true if 'c' is in 'set'.
*/
bool operator[](const char c) const;
/**
* Get the first character set into the mask
*/
const char first() const;
/**
* Clear the WvStringMask, so that all lookups return false.
*/
void zap();
/**
* Set a character 'c' to a particular truth value.
*/
void set(const char c, bool value);
/**
* Set all characters in string 's' to a particular truth value.
*/
void set(WvStringParm s, bool value);
private:
bool _set[256];
char _first;
};
#endif // __WVSTRINGMASK_H
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