3 * Interface to several small and furry utilities. */
13 string ToString(T const & t)
16 ostrstream(buf,sizeof(buf)) << t << ends;
20 unsigned log2(unsigned n);
22 int compare_pointers(void const * a, void const * b);
24 #define DYNCONSTCAST(FINALTYPE,BASICTYPE,EXPRESSION) \
25 dynamic_cast<FINALTYPE>(const_cast<BASICTYPE>(EXPRESSION))
27 // modified from stl_algo.h: always do com(*first1,*first2) instead of comp(*first2,*first1)
28 template <class InputIterator1, class InputIterator2, class OutputIterator,
30 OutputIterator mymerge(InputIterator1 first1, InputIterator1 last1,
31 InputIterator2 first2, InputIterator2 last2,
32 OutputIterator result, Compare comp) {
33 while (first1 != last1 && first2 != last2) {
34 if (comp(*first1, *first2)) {
44 return copy(first2, last2, copy(first1, last1, result));
47 // like merge(), but three lists with *last2<*first3
48 template <class InputIterator1, class InputIterator2, class InputIterator3,
49 class OutputIterator, class Compare>
50 OutputIterator mymerge3(InputIterator1 first1, InputIterator1 last1,
51 InputIterator2 first2, InputIterator2 last2,
52 InputIterator3 first3, InputIterator3 last3,
53 OutputIterator result, Compare comp) {
54 while (first1 != last1 && first2 != last2) {
55 if (comp(*first1, *first2)) {
67 // list1 empty, copy rest of list2, then list3
68 return copy(first3, last3, copy(first2, last2, result));
70 // list2 empty, merge rest of list1 with list3
71 return mymerge(first1,last1,first3,last3,result,comp);
75 #endif // ndef _UTILS_H_