New function chk_manage_vec.

This function manages a dynamic array using only the filled
size as input, while minimizing reallocations. The allocated
size is implicitly always the next power of two at or above
the filled size.

* lib.c (next_pow_two): New static function.
(chk_manage_vec): New function.

* lib.h (chk_manage_vec): Declared.

1 files changed, 2 insertions, 0 deletions

diff --git a/lib.h b/lib.h
index 0d0228d4..f2ce5f9b 100644
--- a/lib.h
+++ b/lib.h
@@ -535,6 +535,8 @@ mem_t *chk_calloc(size_t n, size_t size);
 mem_t *chk_realloc(mem_t *, size_t size);
 mem_t *chk_grow_vec(mem_t *old, size_t oldelems, size_t newelems,
                     size_t elsize);
+mem_t *chk_manage_vec(mem_t *old, size_t oldfilled, size_t newfilled,
+                      size_t elsize, mem_t *fillval);
 wchar_t *chk_wmalloc(size_t nwchar);
 wchar_t *chk_strdup(const wchar_t *str);
 char *chk_strdup_utf8(const char *str);