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-rw-r--r--src/engine/snapshot.cpp263
1 files changed, 0 insertions, 263 deletions
diff --git a/src/engine/snapshot.cpp b/src/engine/snapshot.cpp
deleted file mode 100644
index e8b75d36..00000000
--- a/src/engine/snapshot.cpp
+++ /dev/null
@@ -1,263 +0,0 @@
-
-#include "packet.h"
-#include "snapshot.h"
-
-struct snapshot_delta
-{
-	int num_deleted_items;
-	int num_update_items;
-	int num_temp_items; // needed?
-	int data[1];
-	
-	/*
-	char *data_start() { return (char *)&offsets[num_deleted_items+num_update_items+num_temp_items]; }
-	
-	int deleted_item(int index) { return offsets[index]; }
-	item *update_item(int index) { return (item *)(data_start() + offsets[num_deleted_items+index]); }
-	item *temp_item(int index) { return (item *)(data_start() + offsets[num_deleted_items+num_update_items+index]); }
-	* */
-};
-
-
-static const int MAX_ITEMS = 512;
-static snapshot_delta empty = {0,0,0,{0}};
-
-void *snapshot_empty_delta()
-{
-	return ∅
-}
-
-int snapshot_crc(snapshot *snap)
-{
-	int crc = 0;
-	
-	for(int i = 0; i < snap->num_items; i++)
-	{
-		snapshot::item *item = snap->get_item(i);
-		int size = snap->get_item_datasize(i);
-		
-		for(int b = 0; b < size/4; b++)
-			crc += item->data()[b];
-	}
-	return crc;
-}
-
-void snapshot_debug_dump(snapshot *snap)
-{
-	dbg_msg("snapshot", "data_size=%d num_items=%d", snap->data_size, snap->num_items);
-	for(int i = 0; i < snap->num_items; i++)
-	{
-		snapshot::item *item = snap->get_item(i);
-		int size = snap->get_item_datasize(i);
-		dbg_msg("snapshot", "\ttype=%d id=%d", item->type(), item->id());
-		for(int b = 0; b < size/4; b++)
-			dbg_msg("snapshot", "\t\t%3d %12d\t%08x", b, item->data()[b], item->data()[b]);
-	}
-}
-
-static int diff_item(int *past, int *current, int *out, int size)
-{
-	/*
-	int needed = 0;
-	while(size)
-	{
-		*out = *current-*past;
-		if(*out)
-			needed = 1;
-		out++;
-		current++;
-		past++;
-		size--;
-	}*/
-
-	int needed = 0;
-	while(size)
-	{
-		*out = *current-*past;
-		if(*out)
-			needed = 1;
-		
-		out++;
-		past++;
-		current++;
-		size--;
-	}
-	
-	return needed;
-}
-
-// 1 = 4-3
-// d = n-p
-
-// n(4) = p(3)+d(1)
-
-static void undiff_item(int *past, int *diff, int *out, int size)
-{
-	while(size)
-	{
-		*out = *past+*diff;
-		out++;
-		past++;
-		diff++;
-		size--;
-	}
-}
-
-int snapshot_create_delta(snapshot *from, snapshot *to, void *dstdata)
-{
-	//int deleted[MAX_ITEMS];
-	//int update[MAX_ITEMS];
-	//int mark[MAX_ITEMS];
-	//char data[MAX_SNAPSHOT_SIZE];
-	
-	snapshot_delta *delta = (snapshot_delta *)dstdata;
-	int *data = (int *)delta->data;
-	
-	
-	delta->num_deleted_items = 0;
-	delta->num_update_items = 0;
-	delta->num_temp_items = 0;
-
-	// pack deleted stuff
-	for(int i = 0; i < from->num_items; i++)
-	{
-		snapshot::item *fromitem = from->get_item(i);
-		if(to->get_item_index(fromitem->key()) == -1)
-		{
-			// deleted
-			delta->num_deleted_items++;
-			*data = fromitem->key();
-			data++;
-		}
-	}
-	
-	// pack updated stuff
-	int count = 0, size_count = 0;
-	for(int i = 0; i < to->num_items; i++)
-	{
-		// do delta
-		int itemsize = to->get_item_datasize(i);
-		
-		snapshot::item *curitem = to->get_item(i);
-		int pastindex = from->get_item_index(curitem->key());
-		if(pastindex != -1)
-		{
-			snapshot::item *pastitem = from->get_item(pastindex);
-			if(diff_item((int*)pastitem->data(), (int*)curitem->data(), data+3, itemsize/4))
-			{
-				*data++ = itemsize;
-				*data++ = curitem->type();
-				*data++ = curitem->id();
-				//*data++ = curitem->key();
-				data += itemsize/4;
-				delta->num_update_items++;
-			}
-		}
-		else
-		{
-			*data++ = itemsize;
-			*data++ = curitem->type();
-			*data++ = curitem->id();
-			//*data++ = curitem->key();
-			
-			mem_copy(data, curitem->data(), itemsize);
-			size_count += itemsize;
-			data += itemsize/4;
-			delta->num_update_items++;
-			count++;
-		}
-	}
-	
-	if(0)
-	{
-		dbg_msg("snapshot", "%d %d %d",
-			delta->num_deleted_items,
-			delta->num_update_items,
-			delta->num_temp_items);
-	}
-
-	// TODO: pack temp stuff
-	
-	// finish
-	//mem_copy(delta->offsets, deleted, delta->num_deleted_items*sizeof(int));
-	//mem_copy(&(delta->offsets[delta->num_deleted_items]), update, delta->num_update_items*sizeof(int));
-	//mem_copy(&(delta->offsets[delta->num_deleted_items+delta->num_update_items]), temp, delta->num_temp_items*sizeof(int));
-	//mem_copy(delta->data_start(), data, data_size);
-	//delta->data_size = data_size;
-	
-	if(!delta->num_deleted_items && !delta->num_update_items && !delta->num_temp_items)
-		return 0;
-	
-	return (int)((char*)data-(char*)dstdata);
-}
-
-int snapshot_unpack_delta(snapshot *from, snapshot *to, void *srcdata, int data_size)
-{
-	snapshot_builder builder;
-	snapshot_delta *delta = (snapshot_delta *)srcdata;
-	int *data = (int *)delta->data;
-	
-	builder.start();
-	
-	// unpack deleted stuff
-	int *deleted = data;
-	data += delta->num_deleted_items;
-
-	// copy all non deleted stuff
-	for(int i = 0; i < from->num_items; i++)
-	{
-		//dbg_assert(0, "fail!");
-		snapshot::item *fromitem = from->get_item(i);
-		int itemsize = from->get_item_datasize(i);
-		int keep = 1;
-		for(int d = 0; d < delta->num_deleted_items; d++)
-		{
-			if(deleted[d] == fromitem->key())
-			{
-				keep = 0;
-				break;
-			}
-		}
-		
-		if(keep)
-		{
-			// keep it
-			int *newdata = (int *)(snapshot::item *)builder.new_item(fromitem->type(), fromitem->id(), itemsize);
-			mem_copy(newdata, fromitem->data(), itemsize);
-		}
-	}
-		
-	// unpack updated stuff
-	for(int i = 0; i < delta->num_update_items; i++)
-	{
-		int itemsize, id, type, key;
-		itemsize = *data++;
-		//key = *data++;
-		type = *data++;
-		id = *data++;
-		
-		key = (type<<16)|id;
-		
-		// create the item if needed
-		int *newdata = builder.get_item_data(key);
-		if(!newdata)
-			newdata = (int *)builder.new_item(key>>16, key&0xffff, itemsize);
-			
-		int fromindex = from->get_item_index(key);
-		if(fromindex != -1)
-		{
-			// we got an update so we need to apply the diff
-			int *pastdata = (int *)from->get_item(fromindex)->data();
-			undiff_item(pastdata, data, newdata, itemsize/4);
-		}
-		else // no previous, just copy the data
-			mem_copy(newdata, data, itemsize);
-			
-		data += itemsize/4;
-	}
-	
-	// TODO: unpack temp stuff
-	
-	// finish up
-	return builder.finish(to);
-}
generated by cgit-pink 1.4.1 (git 2.36.1) at 2025-12-10 11:30:54 +0000