root/maint/gnulib/lib/qsort_r.c

/* */

DEFINITIONS

1. thunk_cmp
2. qsort_r

   1 /* Reentrant sort function.
   2 
   3    Copyright 2014-2021 Free Software Foundation, Inc.
   4 
   5    This file is free software: you can redistribute it and/or modify
   6    it under the terms of the GNU Lesser General Public License as
   7    published by the Free Software Foundation; either version 2.1 of the
   8    License, or (at your option) any later version.
   9 
  10    This file is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU Lesser General Public License for more details.
  14 
  15    You should have received a copy of the GNU Lesser General Public License
  16    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  17 
  18 /* Written by Paul Eggert.  */
  19 
  20 #include <config.h>
  21 
  22 #include <stdlib.h>
  23 
  24 /* This file is compiled only when the system has a qsort_r that needs
  25    to be replaced because it has the BSD signature rather than the GNU
  26    signature.  */
  27 
  28 struct thunk
  29 {
  30   int (*cmp) (void const *, void const *, void *);
  31   void *arg;
  32 };
  33 
  34 static int
  35 thunk_cmp (void *thunk, void const *a, void const *b)
     /*  */
  36 {
  37   struct thunk *th = thunk;
  38   return th->cmp (a, b, th->arg);
  39 }
  40 
  41 void
  42 qsort_r (void *base, size_t nmemb, size_t size,
     /*  */
  43          int (*cmp) (void const *, void const *, void *),
  44          void *arg)
  45 {
  46 # undef qsort_r
  47   struct thunk thunk;
  48   thunk.cmp = cmp;
  49   thunk.arg = arg;
  50   qsort_r (base, nmemb, size, &thunk, thunk_cmp);
  51 }

/* */