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#ifndef PATTERN_H
#define PATTERN_H
class base_pattern
{
public:
virtual ~base_pattern() { }
virtual bool valid() const = 0;
virtual bool matches(const string &s) const = 0;
virtual const string &tostring() const = 0;
};
class text_pattern : public base_pattern
{
public:
text_pattern(const string &s, bool icase = false)
: pattern(s), compiled_pattern(NULL),
isvalid(true), ignore_case(icase)
{
}
text_pattern()
: pattern(), compiled_pattern(NULL),
isvalid(false), ignore_case(false)
{
}
text_pattern(const text_pattern &tp)
: base_pattern(tp),
pattern(tp.pattern),
compiled_pattern(NULL),
isvalid(tp.isvalid),
ignore_case(tp.ignore_case)
{
}
~text_pattern();
const text_pattern &operator= (const text_pattern &tp);
const text_pattern &operator= (const string &spattern);
bool operator== (const text_pattern &tp) const;
bool compile() const;
bool empty() const { return !pattern.length(); }
bool valid() const
{
return isvalid
&& (compiled_pattern || (isvalid = compile()));
}
bool matches(const char *s, int length) const;
bool matches(const char *s) const
{
return matches(s, strlen(s));
}
bool matches(const string &s) const
{
return matches(s.c_str(), s.length());
}
const string &tostring() const
{
return pattern;
}
private:
string pattern;
mutable void *compiled_pattern;
mutable bool isvalid;
bool ignore_case;
};
#endif
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