reactos/lib/imagehlp/internal.c

   1 /*
   2  *      IMAGEHLP library
   3  *
   4  *      Copyright 1998  Patrik Stridvall
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include <stdarg.h>
  22
  23 #include "windef.h"
  24 #include "winbase.h"
  25 #include "winerror.h"
  26 #include "wine/debug.h"
  27 #include "imagehlp.h"
  28
  29 /***********************************************************************
  30  *              InitializeListHead
  31  */
  32 VOID InitializeListHead(PLIST_ENTRY pListHead)
  33 {
  34   pListHead->Flink = pListHead;
  35   pListHead->Blink = pListHead;
  36 }
  37
  38 /***********************************************************************
  39  *              InsertHeadList
  40  */
  41 VOID InsertHeadList(PLIST_ENTRY pListHead, PLIST_ENTRY pEntry)
  42 {
  43   pEntry->Blink = pListHead;
  44   pEntry->Flink = pListHead->Flink;
  45   pListHead->Flink = pEntry;
  46 }
  47
  48 /***********************************************************************
  49  *              InsertTailList
  50  */
  51 VOID InsertTailList(PLIST_ENTRY pListHead, PLIST_ENTRY pEntry)
  52 {
  53   pEntry->Flink = pListHead;
  54   pEntry->Blink = pListHead->Blink;
  55   pListHead->Blink = pEntry;
  56 }
  57
  58 /***********************************************************************
  59  *              IsListEmpty
  60  */
  61 BOOLEAN IsListEmpty(PLIST_ENTRY pListHead)
  62 {
  63   return !pListHead;
  64 }
  65
  66 /***********************************************************************
  67  *              PopEntryList
  68  */
  69 PSINGLE_LIST_ENTRY PopEntryList(PSINGLE_LIST_ENTRY pListHead)
  70 {
  71   pListHead->Next = NULL;
  72   return pListHead;
  73 }
  74
  75 /***********************************************************************
  76  *              PushEntryList
  77  */
  78 VOID PushEntryList(
  79   PSINGLE_LIST_ENTRY pListHead, PSINGLE_LIST_ENTRY pEntry)
  80 {
  81   pEntry->Next=pListHead;
  82 }
  83
  84 /***********************************************************************
  85  *              RemoveEntryList
  86  */
  87 VOID RemoveEntryList(PLIST_ENTRY pEntry)
  88 {
  89   pEntry->Flink->Blink = pEntry->Blink;
  90   pEntry->Blink->Flink = pEntry->Flink;
  91   pEntry->Flink = NULL;
  92   pEntry->Blink = NULL;
  93 }
  94
  95 /***********************************************************************
  96  *              RemoveHeadList
  97  */
  98 PLIST_ENTRY RemoveHeadList(PLIST_ENTRY pListHead)
  99 {
 100   PLIST_ENTRY p = pListHead->Flink;
 101
 102   if(p != pListHead)
 103     {
 104       RemoveEntryList(pListHead);
 105       return p;
 106     }
 107   else
 108     {
 109       pListHead->Flink = NULL;
 110       pListHead->Blink = NULL;
 111       return NULL;
 112     }
 113 }
 114
 115 /***********************************************************************
 116  *              RemoveTailList
 117  */
 118 PLIST_ENTRY RemoveTailList(PLIST_ENTRY pListHead)
 119 {
 120   RemoveHeadList(pListHead->Blink);
 121   if(pListHead != pListHead->Blink)
 122     return pListHead;
 123   else
 124     return NULL;
 125 }