mirror of
https://github.com/pocoproject/poco.git
synced 2024-12-25 09:05:50 +01:00
b0581433a7
fix: remove executable flag and change back to 100644 (was 100755) Signed-off-by: Roger Meier <r.meier@siemens.com>
144 lines
3.4 KiB
C++
144 lines
3.4 KiB
C++
//
|
|
// TextIterator.h
|
|
//
|
|
// $Id: //poco/1.4/Foundation/include/Poco/TextIterator.h#1 $
|
|
//
|
|
// Library: Foundation
|
|
// Package: Text
|
|
// Module: TextIterator
|
|
//
|
|
// Definition of the TextIterator class.
|
|
//
|
|
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
|
|
// and Contributors.
|
|
//
|
|
// SPDX-License-Identifier: BSL-1.0
|
|
//
|
|
|
|
|
|
#ifndef Foundation_TextIterator_INCLUDED
|
|
#define Foundation_TextIterator_INCLUDED
|
|
|
|
|
|
#include "Poco/Foundation.h"
|
|
|
|
|
|
namespace Poco {
|
|
|
|
|
|
class TextEncoding;
|
|
|
|
|
|
class Foundation_API TextIterator
|
|
/// An unidirectional iterator for iterating over characters in a string.
|
|
/// The TextIterator uses a TextEncoding object to
|
|
/// work with multi-byte character encodings like UTF-8.
|
|
/// Characters are reported in Unicode.
|
|
///
|
|
/// Example: Count the number of UTF-8 characters in a string.
|
|
///
|
|
/// UTF8Encoding utf8Encoding;
|
|
/// std::string utf8String("....");
|
|
/// TextIterator it(utf8String, utf8Encoding);
|
|
/// TextIterator end(utf8String);
|
|
/// int n = 0;
|
|
/// while (it != end) { ++n; ++it; }
|
|
///
|
|
/// NOTE: When an UTF-16 encoding is used, surrogate pairs will be
|
|
/// reported as two separate characters, due to restrictions of
|
|
/// the TextEncoding class.
|
|
///
|
|
/// For iterating over char buffers, see the TextBufferIterator class.
|
|
{
|
|
public:
|
|
TextIterator();
|
|
/// Creates an uninitialized TextIterator.
|
|
|
|
TextIterator(const std::string& str, const TextEncoding& encoding);
|
|
/// Creates a TextIterator for the given string.
|
|
/// The encoding object must not be deleted as long as the iterator
|
|
/// is in use.
|
|
|
|
TextIterator(const std::string::const_iterator& begin, const std::string::const_iterator& end, const TextEncoding& encoding);
|
|
/// Creates a TextIterator for the given range.
|
|
/// The encoding object must not be deleted as long as the iterator
|
|
/// is in use.
|
|
|
|
TextIterator(const std::string& str);
|
|
/// Creates an end TextIterator for the given string.
|
|
|
|
TextIterator(const std::string::const_iterator& end);
|
|
/// Creates an end TextIterator.
|
|
|
|
~TextIterator();
|
|
/// Destroys the TextIterator.
|
|
|
|
TextIterator(const TextIterator& it);
|
|
/// Copy constructor.
|
|
|
|
TextIterator& operator = (const TextIterator& it);
|
|
/// Assignment operator.
|
|
|
|
void swap(TextIterator& it);
|
|
/// Swaps the iterator with another one.
|
|
|
|
int operator * () const;
|
|
/// Returns the Unicode value of the current character.
|
|
/// If there is no valid character at the current position,
|
|
/// -1 is returned.
|
|
|
|
TextIterator& operator ++ ();
|
|
/// Prefix increment operator.
|
|
|
|
TextIterator operator ++ (int);
|
|
/// Postfix increment operator.
|
|
|
|
bool operator == (const TextIterator& it) const;
|
|
/// Compares two iterators for equality.
|
|
|
|
bool operator != (const TextIterator& it) const;
|
|
/// Compares two iterators for inequality.
|
|
|
|
TextIterator end() const;
|
|
/// Returns the end iterator for the range handled
|
|
/// by the iterator.
|
|
|
|
private:
|
|
const TextEncoding* _pEncoding;
|
|
std::string::const_iterator _it;
|
|
std::string::const_iterator _end;
|
|
};
|
|
|
|
|
|
//
|
|
// inlines
|
|
//
|
|
inline bool TextIterator::operator == (const TextIterator& it) const
|
|
{
|
|
return _it == it._it;
|
|
}
|
|
|
|
|
|
inline bool TextIterator::operator != (const TextIterator& it) const
|
|
{
|
|
return _it != it._it;
|
|
}
|
|
|
|
|
|
inline void swap(TextIterator& it1, TextIterator& it2)
|
|
{
|
|
it1.swap(it2);
|
|
}
|
|
|
|
|
|
inline TextIterator TextIterator::end() const
|
|
{
|
|
return TextIterator(_end);
|
|
}
|
|
|
|
|
|
} // namespace Poco
|
|
|
|
|
|
#endif // Foundation_TextIterator_INCLUDED
|