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#ifndef __stringparserstate_h__
#define __stringparserstate_h__
// ### optimize me: it's stupid to do a linear search for each
// atEnd() invocation. This should be done once in the ctor and
// end() should be set appropriately
template <typename CharType, typename _SizeType = size_t>
class StringParserState
{
public:
typedef CharType ValueType;
typedef const CharType * ConstIterator;
typedef _SizeType SizeType;
typedef TQValueList<ValueType> ValueList;
StringParserState( ConstIterator start, SizeType maxSteps,
const ValueList &optionalEndItems = ValueList() )
{
m_begin = start;
m_current = start;
m_end = start + maxSteps;
m_endItems = optionalEndItems;
}
void operator++() { ++m_current; }
bool atBegin() const
{
return m_current == m_begin;
}
bool atEnd() const
{
if ( m_current >= m_end )
return true;
return m_endItems.findIndex( currentValue() ) != -1;
}
ConstIterator current() const { return m_current; }
ValueType currentValue() const { return *current(); }
ConstIterator begin() const { return m_begin; }
ConstIterator end() const { return m_end; }
SizeType stepsLeft() const { return m_end - m_current; }
SizeType advanceTo( ValueType val )
{
ConstIterator start = m_current;
while ( !atEnd() && currentValue() != val )
++m_current;
return m_current - start;
}
SizeType skip( ValueType valueToIgnore )
{
ConstIterator start = m_current;
while ( !atEnd() && currentValue() == valueToIgnore )
++m_current;
return m_current - start;
}
private:
ConstIterator m_begin;
ConstIterator m_current;
ConstIterator m_end;
ValueList m_endItems;
};
#endif
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