| 266 | // The iterator class |
| 267 | template <typename octet_iterator> |
| 268 | class iterator : public std::iterator <std::bidirectional_iterator_tag, uint32_t> { |
| 269 | octet_iterator it; |
| 270 | octet_iterator range_start; |
| 271 | octet_iterator range_end; |
| 272 | public: |
| 273 | iterator () {} |
| 274 | explicit iterator (const octet_iterator& octet_it, |
| 275 | const octet_iterator& range_start, |
| 276 | const octet_iterator& range_end) : |
| 277 | it(octet_it), range_start(range_start), range_end(range_end) |
| 278 | { |
| 279 | if (it < range_start || it > range_end) |
| 280 | throw std::out_of_range("Invalid utf-8 iterator position"); |
| 281 | } |
| 282 | // the default "big three" are OK |
| 283 | octet_iterator base () const { return it; } |
| 284 | uint32_t operator * () const |
| 285 | { |
| 286 | octet_iterator temp = it; |
| 287 | return utf8::next(temp, range_end); |
| 288 | } |
| 289 | bool operator == (const iterator& rhs) const |
| 290 | { |
| 291 | if (range_start != rhs.range_start || range_end != rhs.range_end) |
| 292 | throw std::logic_error("Comparing utf-8 iterators defined with different ranges"); |
| 293 | return (it == rhs.it); |
| 294 | } |
| 295 | bool operator != (const iterator& rhs) const |
| 296 | { |
| 297 | return !(operator == (rhs)); |
| 298 | } |
| 299 | iterator& operator ++ () |
| 300 | { |
| 301 | utf8::next(it, range_end); |
| 302 | return *this; |
| 303 | } |
| 304 | iterator operator ++ (int) |
| 305 | { |
| 306 | iterator temp = *this; |
| 307 | utf8::next(it, range_end); |
| 308 | return temp; |
| 309 | } |
| 310 | iterator& operator -- () |
| 311 | { |
| 312 | utf8::prior(it, range_start); |
| 313 | return *this; |
| 314 | } |
| 315 | iterator operator -- (int) |
| 316 | { |
| 317 | iterator temp = *this; |
| 318 | utf8::prior(it, range_start); |
| 319 | return temp; |
| 320 | } |
| 321 | }; // class iterator |
| 322 | |
| 323 | } // namespace utf8 |
| 324 | |