- inline bool
- lexicographical_compare(const unsigned char* __first1,
- const unsigned char* __last1,
- const unsigned char* __first2,
- const unsigned char* __last2)
- {
- const size_t __len1 = __last1 - __first1;
- const size_t __len2 = __last2 - __first2;
- const int __result = memcmp(__first1, __first2, std::min(__len1, __len2));
- return __result != 0 ? __result < 0 : __len1 < __len2;
- }
-
- inline bool
- lexicographical_compare(const char* __first1, const char* __last1,
- const char* __first2, const char* __last2)
- {
-#if CHAR_MAX == SCHAR_MAX
- return lexicographical_compare((const signed char*) __first1,
- (const signed char*) __last1,
- (const signed char*) __first2,
- (const signed char*) __last2);
-#else /* CHAR_MAX == SCHAR_MAX */
- return lexicographical_compare((const unsigned char*) __first1,
- (const unsigned char*) __last1,
- (const unsigned char*) __first2,
- (const unsigned char*) __last2);
-#endif /* CHAR_MAX == SCHAR_MAX */
- }
-
-} // namespace std
-
-#endif
+ /**
+ * @brief Finds the places in ranges which don't match.
+ * @ingroup non_mutating_algorithms
+ * @param first1 An input iterator.
+ * @param last1 An input iterator.
+ * @param first2 An input iterator.
+ * @return A pair of iterators pointing to the first mismatch.
+ *
+ * This compares the elements of two ranges using @c == and returns a pair
+ * of iterators. The first iterator points into the first range, the
+ * second iterator points into the second range, and the elements pointed
+ * to by the iterators are not equal.
+ */
+ template<typename _InputIterator1, typename _InputIterator2>
+ pair<_InputIterator1, _InputIterator2>
+ mismatch(_InputIterator1 __first1, _InputIterator1 __last1,
+ _InputIterator2 __first2)
+ {
+ // concept requirements
+ __glibcxx_function_requires(_InputIteratorConcept<_InputIterator1>)
+ __glibcxx_function_requires(_InputIteratorConcept<_InputIterator2>)
+ __glibcxx_function_requires(_EqualOpConcept<
+ typename iterator_traits<_InputIterator1>::value_type,
+ typename iterator_traits<_InputIterator2>::value_type>)
+ __glibcxx_requires_valid_range(__first1, __last1);
+
+ while (__first1 != __last1 && *__first1 == *__first2)
+ {
+ ++__first1;
+ ++__first2;
+ }
+ return pair<_InputIterator1, _InputIterator2>(__first1, __first2);
+ }
+
+ /**
+ * @brief Finds the places in ranges which don't match.
+ * @ingroup non_mutating_algorithms
+ * @param first1 An input iterator.
+ * @param last1 An input iterator.
+ * @param first2 An input iterator.
+ * @param binary_pred A binary predicate @link functors
+ * functor@endlink.
+ * @return A pair of iterators pointing to the first mismatch.
+ *
+ * This compares the elements of two ranges using the binary_pred
+ * parameter, and returns a pair
+ * of iterators. The first iterator points into the first range, the
+ * second iterator points into the second range, and the elements pointed
+ * to by the iterators are not equal.
+ */
+ template<typename _InputIterator1, typename _InputIterator2,
+ typename _BinaryPredicate>
+ pair<_InputIterator1, _InputIterator2>
+ mismatch(_InputIterator1 __first1, _InputIterator1 __last1,
+ _InputIterator2 __first2, _BinaryPredicate __binary_pred)
+ {
+ // concept requirements
+ __glibcxx_function_requires(_InputIteratorConcept<_InputIterator1>)
+ __glibcxx_function_requires(_InputIteratorConcept<_InputIterator2>)
+ __glibcxx_requires_valid_range(__first1, __last1);
+
+ while (__first1 != __last1 && bool(__binary_pred(*__first1, *__first2)))
+ {
+ ++__first1;
+ ++__first2;
+ }
+ return pair<_InputIterator1, _InputIterator2>(__first1, __first2);
+ }
+
+_GLIBCXX_END_NESTED_NAMESPACE
+
+// NB: This file is included within many other C++ includes, as a way
+// of getting the base algorithms. So, make sure that parallel bits
+// come in too if requested.
+#ifdef _GLIBCXX_PARALLEL
+# include <parallel/algobase.h>
+#endif
+
+#endif