diff options
Diffstat (limited to 'boost/move/algo/adaptive_merge.hpp')
-rw-r--r-- | boost/move/algo/adaptive_merge.hpp | 35 |
1 files changed, 29 insertions, 6 deletions
diff --git a/boost/move/algo/adaptive_merge.hpp b/boost/move/algo/adaptive_merge.hpp index 0040fda065..4de4007e2d 100644 --- a/boost/move/algo/adaptive_merge.hpp +++ b/boost/move/algo/adaptive_merge.hpp @@ -137,6 +137,30 @@ inline void adaptive_merge_final_merge( RandIt first BOOST_MOVE_ADAPTIVE_SORT_PRINT_L1(" A fin mrg: ", len); } +template<class SizeType> +inline static SizeType adaptive_merge_n_keys_without_external_keys(SizeType l_block, SizeType len1, SizeType len2, SizeType l_intbuf) +{ + typedef SizeType size_type; + //This is the minimum number of keys to implement the ideal algorithm + size_type n_keys = len1/l_block+len2/l_block; + const size_type second_half_blocks = len2/l_block; + const size_type first_half_aux = len1-l_intbuf; + while(n_keys >= ((first_half_aux-n_keys)/l_block + second_half_blocks)){ + --n_keys; + } + ++n_keys; + return n_keys; +} + +template<class SizeType> +inline static SizeType adaptive_merge_n_keys_with_external_keys(SizeType l_block, SizeType len1, SizeType len2, SizeType l_intbuf) +{ + typedef SizeType size_type; + //This is the minimum number of keys to implement the ideal algorithm + size_type n_keys = (len1-l_intbuf)/l_block + len2/l_block; + return n_keys; +} + template<class SizeType, class Xbuf> inline SizeType adaptive_merge_n_keys_intbuf(SizeType &rl_block, SizeType len1, SizeType len2, Xbuf & xbuf, SizeType &l_intbuf_inout) { @@ -149,14 +173,13 @@ inline SizeType adaptive_merge_n_keys_intbuf(SizeType &rl_block, SizeType len1, } //This is the minimum number of keys to implement the ideal algorithm - size_type n_keys = len1/l_block+len2/l_block; - while(n_keys >= ((len1-l_intbuf-n_keys)/l_block + len2/l_block)){ - --n_keys; - } - ++n_keys; + size_type n_keys = adaptive_merge_n_keys_without_external_keys(l_block, len1, len2, l_intbuf); BOOST_ASSERT(n_keys >= ((len1-l_intbuf-n_keys)/l_block + len2/l_block)); - if(xbuf.template supports_aligned_trailing<size_type>(l_block, n_keys)){ + if(xbuf.template supports_aligned_trailing<size_type> + ( l_block + , adaptive_merge_n_keys_with_external_keys(l_block, len1, len2, l_intbuf))) + { n_keys = 0u; } l_intbuf_inout = l_intbuf; |