libseven/tools.c

   1 /*
   2  *  ircd-ratbox: A slightly useful ircd.
   3  *  tools.c: Various functions needed here and there.
   4  *
   5  *  Copyright (C) 1996-2002 Hybrid Development Team
   6  *  Copyright (C) 2002-2005 ircd-ratbox development team
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License as published by
  10  *  the Free Software Foundation; either version 2 of the License, or
  11  *  (at your option) any later version.
  12  *
  13  *  This program is distributed in the hope that it will be useful,
  14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *  GNU General Public License for more details.
  17  *
  18  *  You should have received a copy of the GNU General Public License
  19  *  along with this program; if not, write to the Free Software
  20  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
  21  *  USA
  22  *
  23  *  Here is the original header:
  24  *
  25  *  Useful stuff, ripped from places ..
  26  *  adrian chadd <adrian@creative.net.au>
  27  *
  28  * When you update these functions make sure you update the ones in tools.h
  29  * as well!!!
  30  */
  31
  32 #include "stdinc.h"
  33 #define TOOLS_C
  34 #include "tools.h"
  35 #include "balloc.h"
  36 #include "s_user.h"
  37
  38 #ifndef NDEBUG
  39 /*
  40  * frob some memory. debugging time.
  41  * -- adrian
  42  */
  43 void
  44 mem_frob(void *data, int len)
  45 {
  46         unsigned long x = 0xdeadbeef;
  47         unsigned char *b = (unsigned char *)&x;
  48         int i;
  49         char *cdata = data;
  50         for (i = 0; i < len; i++)
  51         {
  52                 *cdata = b[i % 4];
  53                 cdata++;
  54         }
  55 }
  56 #endif
  57
  58 /*
  59  * init_dlink_nodes
  60  *
  61  */
  62 extern BlockHeap *dnode_heap;
  63 void
  64 init_dlink_nodes(void)
  65 {
  66         dnode_heap = BlockHeapCreate(sizeof(dlink_node), DNODE_HEAP_SIZE);
  67         if(dnode_heap == NULL)
  68                 outofmemory();
  69 }
  70
  71 /*
  72  * make_dlink_node
  73  *
  74  * inputs       - NONE
  75  * output       - pointer to new dlink_node
  76  * side effects - NONE
  77  */
  78 dlink_node *
  79 make_dlink_node(void)
  80 {
  81         return(BlockHeapAlloc(dnode_heap));
  82 }
  83
  84 /*
  85  * free_dlink_node
  86  *
  87  * inputs       - pointer to dlink_node
  88  * output       - NONE
  89  * side effects - free given dlink_node
  90  */
  91 void
  92 free_dlink_node(dlink_node * ptr)
  93 {
  94         assert(ptr != NULL);
  95
  96         BlockHeapFree(dnode_heap, ptr);
  97 }
  98
  99 /*
 100  * find_umode_slot
 101  *
 102  * inputs       - NONE
 103  * outputs      - an available umode bitmask or
 104  *                0 if no umodes are available
 105  * side effects - NONE
 106  */
 107 unsigned int
 108 find_umode_slot(void)
 109 {
 110         unsigned int all_umodes = 0, my_umode = 0, i;
 111
 112         for (i = 0; i < 128; i++)
 113                 all_umodes |= user_modes[i];
 114
 115         for (my_umode = 1; my_umode && (all_umodes & my_umode);
 116                 my_umode <<= 1);
 117
 118         return my_umode;
 119 }