diff options
Diffstat (limited to 'wikisort.c')
| -rw-r--r-- | wikisort.c | 9 |
1 files changed, 9 insertions, 0 deletions
@@ -182,6 +182,15 @@ void wikisort(void *unsorted, size_t nmel, size_t width, cmpfun cmp) wikisort( base, nmel - b.blocks * bnmel, width, cmp); wikisort(b.base, b.blocks * bnmel, width, cmp); + /* if already sorted, nothing to do */ + if (cmp(b.base - width, b.base) <= 0) return; + + /* if blocks in b are all less than those in a, just need a rotate */ + if (cmp(base + (nmel - 1) * width, base) <= 0) { + rotate(base, nmel, width, a.blocks * bnmel + bufnmel); + return; + } + size_t nmel_pend_a = 0, nmel_pend_b = 0; char *mina = a.base, *penda; while (a.blocks) { |