Re: A qsort template

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От Zhihong Yu
Тема Re: A qsort template
Дата
Msg-id CALNJ-vQjQ_Kj0dLOeYFApbdbS2r8hW=VtYdan-vZ==H6uom_fA@mail.gmail.com
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Ответ на Re: A qsort template  (Thomas Munro <thomas.munro@gmail.com>)
Ответы Re: A qsort template  (Thomas Munro <thomas.munro@gmail.com>)
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On Tue, Jun 15, 2021 at 10:55 PM Thomas Munro <thomas.munro@gmail.com> wrote:
On Mon, Mar 15, 2021 at 1:09 PM Thomas Munro <thomas.munro@gmail.com> wrote:
> On Sun, Mar 14, 2021 at 5:03 PM Zhihong Yu <zyu@yugabyte.com> wrote:
> > + * Remove duplicates from an array.  Return the new size.
> > + */
> > +ST_SCOPE size_t
> > +ST_UNIQUE(ST_ELEMENT_TYPE *array,
> >
> > The array is supposed to be sorted, right ?
> > The comment should mention this.
>
> Good point, will update.  Thanks!

Rebased.  Also fixed some formatting problems and updated
typedefs.list so they don't come back.

Hi,
In 0001-Add-bsearch-and-unique-templates-to-sort_template.h.patch :

-                                       const ST_ELEMENT_TYPE * ST_SORT_PROTO_ARG);
+                                       const ST_ELEMENT_TYPE *ST_SORT_PROTO_ARG);

It seems there is no real change in the line above. Better keep the original formation.

  *   - ST_COMPARE_ARG_TYPE - type of extra argument
  *
+ *   To say that the comparator returns a type other than int, use:
+ *
+ *       - ST_COMPARE_TYPE - an integer type

Since the ST_COMPARE_TYPE is meant to designate the type of the return value, maybe ST_COMPARE_RET_TYPE would be better name.
It also goes with ST_COMPARE_ARG_TYPE preceding this.

-   ST_POINTER_TYPE *a = (ST_POINTER_TYPE *) data,
-              *pa,
-              *pb,
-              *pc,
-              *pd,
-              *pl,
-              *pm,
-              *pn;
+   ST_POINTER_TYPE *a = (ST_POINTER_TYPE *) data;
+   ST_POINTER_TYPE *pa;

There doesn't seem to be material change for the above hunk.

+   while (left <= right)
+   {
+       size_t      mid = (left + right) / 2;

The computation for midpoint should be left + (right-left)/2.

Cheers

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