X-Git-Url: https://git.artsoft.org/?a=blobdiff_plain;f=src%2Flibgame%2Fsnapshot.c;h=43a42c34d50920813717c73314337aba168a6ad8;hb=730deaee1a38f75d749a21cddbb562c2b339cc73;hp=d28ae349e585acb88d8a4c1daa617f0d465d19ab;hpb=f926e522aef77158e0011ae5ad2cf8805509d6d1;p=rocksndiamonds.git

diff --git a/src/libgame/snapshot.c b/src/libgame/snapshot.c
index d28ae349..43a42c34 100644
--- a/src/libgame/snapshot.c
+++ b/src/libgame/snapshot.c
@@ -1,25 +1,41 @@
-/***********************************************************
-* Artsoft Retro-Game Library                               *
-*----------------------------------------------------------*
-* (c) 1995-2006 Artsoft Entertainment                      *
-*               Holger Schemel                             *
-*               Detmolder Strasse 189                      *
-*               33604 Bielefeld                            *
-*               Germany                                    *
-*               e-mail: info@artsoft.org                   *
-*----------------------------------------------------------*
-* snapshot.c                                               *
-***********************************************************/
+// ============================================================================
+// Artsoft Retro-Game Library
+// ----------------------------------------------------------------------------
+// (c) 1995-2014 by Artsoft Entertainment
+//     		    Holger Schemel
+//		    info@artsoft.org
+//		    http://www.artsoft.org/
+// ----------------------------------------------------------------------------
+// snapshot.c
+// ============================================================================
 
 #include "snapshot.h"
 
 
-static ListNode *engine_snapshot_list = NULL;
+static ListNode *snapshot_single = NULL;
+static ListNode *snapshot_list = NULL;
+static ListNode *snapshot_current = NULL;
 
-void SaveEngineSnapshotBuffer(void *buffer, int size)
+static int num_snapshots_in_list = 0;
+
+#ifdef DEBUG
+#define DEBUG_SNAPSHOTS			0
+#endif
+
+#if DEBUG_SNAPSHOTS
+static int num_snapshot_buffers = 0;
+static int num_snapshot_bytes = 0;
+#endif
+
+
+// -----------------------------------------------------------------------------
+// functions for handling buffers for a single snapshot
+// -----------------------------------------------------------------------------
+
+void SaveSnapshotBuffer(ListNode **snapshot_buffers, void *buffer, int size)
 {
-  struct EngineSnapshotNodeInfo *bi =
-    checked_calloc(sizeof(struct EngineSnapshotNodeInfo));
+  struct SnapshotNodeInfo *bi =
+    checked_calloc(sizeof(struct SnapshotNodeInfo));
 
   bi->buffer_orig = buffer;
   bi->buffer_copy = checked_malloc(size);
@@ -27,29 +43,167 @@ void SaveEngineSnapshotBuffer(void *buffer, int size)
 
   memcpy(bi->buffer_copy, buffer, size);
 
-  addNodeToList(&engine_snapshot_list, NULL, bi);
+  addNodeToList(snapshot_buffers, NULL, bi);
+
+#if DEBUG_SNAPSHOTS
+  num_snapshot_buffers++;
+  num_snapshot_bytes += size;
+#endif
 }
 
-static void LoadEngineSnapshotBuffer(struct EngineSnapshotNodeInfo *bi)
+static void LoadSnapshotBuffer(struct SnapshotNodeInfo *bi)
 {
   memcpy(bi->buffer_orig, bi->buffer_copy, bi->size);
 }
 
-void LoadEngineSnapshotBuffers()
+void LoadSnapshotBuffers(ListNode *snapshot_buffers)
+{
+  while (snapshot_buffers != NULL)
+  {
+    LoadSnapshotBuffer((struct SnapshotNodeInfo *)snapshot_buffers->content);
+
+    snapshot_buffers = snapshot_buffers->next;
+  }
+}
+
+static void FreeSnapshotBuffer(void *bi_raw)
 {
-  ListNode *node = engine_snapshot_list;
+  struct SnapshotNodeInfo *bi = (struct SnapshotNodeInfo *)bi_raw;
+
+#if DEBUG_SNAPSHOTS
+  num_snapshot_buffers--;
+  num_snapshot_bytes -= bi->size;
+#endif
+
+  checked_free(bi->buffer_copy);
+  checked_free(bi);
+}
+
+void FreeSnapshotBuffers(ListNode *snapshot_buffers)
+{
+  while (snapshot_buffers != NULL)
+    deleteNodeFromList(&snapshot_buffers, NULL, FreeSnapshotBuffer);
+}
 
-  while (node != NULL)
+// -----------------------------------------------------------------------------
+// functions for handling single shapshot or list of snapshots
+// -----------------------------------------------------------------------------
+
+static void FreeSnapshot(void *snapshot_buffers_ptr)
+{
+  FreeSnapshotBuffers(snapshot_buffers_ptr);
+}
+
+void FreeSnapshotSingle()
+{
+  FreeSnapshotBuffers(snapshot_single);
+
+  snapshot_single = NULL;
+}
+
+static void FreeSnapshotList_UpToNode(ListNode *node)
+{
+  while (snapshot_list != node)
   {
-    LoadEngineSnapshotBuffer((struct EngineSnapshotNodeInfo *)node->content);
+#if DEBUG_SNAPSHOTS
+    printf("::: FreeSnapshotList_*() [%s, %d, %d]\n",
+	   snapshot_list->key, num_snapshot_buffers, num_snapshot_bytes);
+#endif
 
-    node = node->next;
+    deleteNodeFromList(&snapshot_list, snapshot_list->key, FreeSnapshot);
+
+    num_snapshots_in_list--;
   }
 }
 
-void FreeEngineSnapshotBuffers()
+void FreeSnapshotList()
+{
+#if DEBUG_SNAPSHOTS
+  printf("::: FreeSnapshotList()\n");
+#endif
+
+  FreeSnapshotList_UpToNode(NULL);
+
+  snapshot_current = NULL;
+}
+
+void SaveSnapshotSingle(ListNode *snapshot_buffers)
+{
+  if (snapshot_single)
+    FreeSnapshotSingle();
+
+  snapshot_single = snapshot_buffers;
+}
+
+void SaveSnapshotToList(ListNode *snapshot_buffers)
+{
+  if (snapshot_current != snapshot_list)
+    FreeSnapshotList_UpToNode(snapshot_current);
+
+  addNodeToList(&snapshot_list, i_to_a(num_snapshots_in_list),
+		snapshot_buffers);
+
+  snapshot_current = snapshot_list;
+
+  num_snapshots_in_list++;
+
+#if DEBUG_SNAPSHOTS
+  printf("::: SaveSnapshotToList() [%s, %d, %d]\n",
+	 snapshot_current->key, num_snapshot_buffers, num_snapshot_bytes);
+#endif
+}
+
+boolean LoadSnapshotSingle()
+{
+  if (snapshot_single)
+  {
+    LoadSnapshotBuffers(snapshot_single);
+
+    return TRUE;
+  }
+
+  return FALSE;
+}
+
+boolean LoadSnapshotFromList_Older(int steps)
+{
+  if (snapshot_current && snapshot_current->next)
+  {
+    while (snapshot_current->next && steps--)
+      snapshot_current = snapshot_current->next;
+
+    LoadSnapshotBuffers(snapshot_current->content);
+
+#if DEBUG_SNAPSHOTS
+    printf("::: LoadSnapshotFromList_Older() [%s]\n", snapshot_current->key);
+#endif
+
+    return TRUE;
+  }
+
+  return FALSE;
+}
+
+boolean LoadSnapshotFromList_Newer(int steps)
+{
+  if (snapshot_current && snapshot_current->prev)
+  {
+    while (snapshot_current->prev && steps--)
+      snapshot_current = snapshot_current->prev;
+
+    LoadSnapshotBuffers(snapshot_current->content);
+
+#if DEBUG_SNAPSHOTS
+    printf("::: LoadSnapshotFromList_Newer() [%s]\n", snapshot_current->key);
+#endif
+
+    return TRUE;
+  }
+
+  return FALSE;
+}
+
+boolean CheckSnapshotList()
 {
-  while (engine_snapshot_list != NULL)
-    deleteNodeFromList(&engine_snapshot_list, engine_snapshot_list->key,
-		       checked_free);
+  return (snapshot_list ? TRUE : FALSE);
 }