mdw@git.distorted.org.uk Git - disorder/blob - lib/selection.c

   1 /*
   2  * This file is part of DisOrder
   3  * Copyright (C) 2006 Richard Kettlewell
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  18  * USA
  19  */
  20
  21 #include <config.h>
  22 #include "types.h"
  23
  24 #include "mem.h"
  25 #include "hash.h"
  26 #include "selection.h"
  27
  28 hash *selection_new(void) {
  29   return hash_new(sizeof (int));
  30 }
  31
  32 void selection_set(hash *h, const char *key, int selected) {
  33   if(selected)
  34     hash_add(h, key, xmalloc_noptr(sizeof (int)), HASH_INSERT_OR_REPLACE);
  35   else
  36     hash_remove(h, key);
  37 }
  38
  39 int selection_selected(hash *h, const char *key) {
  40   return hash_find(h, key) != 0;
  41 }
  42
  43 void selection_flip(hash *h, const char *key) {
  44   selection_set(h, key, !selection_selected(h, key));
  45 }
  46
  47 void selection_live(hash *h, const char *key) {
  48   int *ptr = hash_find(h, key);
  49
  50   if(ptr)
  51     *ptr = 1;
  52 }
  53
  54 static int selection_cleanup_callback(const char *key,
  55                                       void *value,
  56                                       void *v) {
  57   if(*(int *)value)
  58     *(int *)value = 0;
  59   else
  60     hash_remove((hash *)v, key);
  61   return 0;
  62 }
  63
  64 void selection_cleanup(hash *h) {
  65   hash_foreach(h, selection_cleanup_callback, h);
  66 }
  67
  68 static int selection_empty_callback(const char *key,
  69                                     void attribute((unused)) *value,
  70                                     void *v) {
  71   hash_remove((hash *)v, key);
  72   return 0;
  73 }
  74
  75 void selection_empty(hash *h) {
  76   hash_foreach(h, selection_empty_callback, h);
  77 }
  78
  79 /*
  80 Local Variables:
  81 c-basic-offset:2
  82 comment-column:40
  83 fill-column:79
  84 indent-tabs-mode:nil
  85 End:
  86 */