From 742370497a4210bff18e4e2c65a3ef7772bc1cc5 Mon Sep 17 00:00:00 2001 From: Mattes D Date: Tue, 24 Jun 2014 09:46:04 +0200 Subject: Fixed crashes in HopperEntity. Some of the coords were off and some functions were assuming too much. Fixes the crash reported in http://forum.mc-server.org/showthread.php?tid=1497 --- src/BlockEntities/HopperEntity.cpp | 77 ++++++++++++++++++++++++++++---------- 1 file changed, 58 insertions(+), 19 deletions(-) (limited to 'src/BlockEntities/HopperEntity.cpp') diff --git a/src/BlockEntities/HopperEntity.cpp b/src/BlockEntities/HopperEntity.cpp index 7f001c739..5856f20d1 100644 --- a/src/BlockEntities/HopperEntity.cpp +++ b/src/BlockEntities/HopperEntity.cpp @@ -294,23 +294,24 @@ bool cHopperEntity::MoveItemsOut(cChunk & a_Chunk, Int64 a_CurrentTick) return false; } - int bx, by, bz; + // Get the coords of the block where to output items: + int OutX, OutY, OutZ; NIBBLETYPE Meta = a_Chunk.GetMeta(m_RelX, m_PosY, m_RelZ); - if (!GetOutputBlockPos(Meta, bx, by, bz)) + if (!GetOutputBlockPos(Meta, OutX, OutY, OutZ)) { // Not attached to another container return false; } - if (by < 0) + if (OutY < 0) { // Cannot output below the zero-th block level return false; } // Convert coords to relative: - int rx = bx - a_Chunk.GetPosX() * cChunkDef::Width; - int rz = bz - a_Chunk.GetPosZ() * cChunkDef::Width; - cChunk * DestChunk = a_Chunk.GetRelNeighborChunkAdjustCoords(rx, rz); + int OutRelX = OutX - a_Chunk.GetPosX() * cChunkDef::Width; + int OutRelZ = OutZ - a_Chunk.GetPosZ() * cChunkDef::Width; + cChunk * DestChunk = a_Chunk.GetRelNeighborChunkAdjustCoords(OutRelX, OutRelZ); if (DestChunk == NULL) { // The destination chunk has been unloaded, don't tick @@ -319,26 +320,32 @@ bool cHopperEntity::MoveItemsOut(cChunk & a_Chunk, Int64 a_CurrentTick) // Call proper moving function, based on the blocktype present at the coords: bool res = false; - switch (DestChunk->GetBlock(rx, by, rz)) + switch (DestChunk->GetBlock(OutRelX, OutY, OutRelZ)) { case E_BLOCK_CHEST: { // Chests have special handling because of double-chests - res = MoveItemsToChest(*DestChunk, bx, by, bz); + res = MoveItemsToChest(*DestChunk, OutX, OutY, OutZ); break; } case E_BLOCK_LIT_FURNACE: case E_BLOCK_FURNACE: { // Furnaces have special handling because of the direction-to-slot relation - res = MoveItemsToFurnace(*DestChunk, bx, by, bz, Meta); + res = MoveItemsToFurnace(*DestChunk, OutX, OutY, OutZ, Meta); break; } case E_BLOCK_DISPENSER: case E_BLOCK_DROPPER: case E_BLOCK_HOPPER: { - res = MoveItemsToGrid(*(cBlockEntityWithItems *)DestChunk->GetBlockEntity(bx, by, bz)); + cBlockEntityWithItems * BlockEntity = (cBlockEntityWithItems *)DestChunk->GetBlockEntity(OutX, OutY, OutZ); + if (BlockEntity == NULL) + { + LOGWARNING("%s: A block entity was not found where expected at {%d, %d, %d}", __FUNCTION__, OutX, OutY, OutZ); + return false; + } + res = MoveItemsToGrid(*BlockEntity); break; } } @@ -359,7 +366,13 @@ bool cHopperEntity::MoveItemsOut(cChunk & a_Chunk, Int64 a_CurrentTick) /// Moves items from a chest (dblchest) above the hopper into this hopper. Returns true if contents have changed. bool cHopperEntity::MoveItemsFromChest(cChunk & a_Chunk) { - if (MoveItemsFromGrid(*(cChestEntity *)a_Chunk.GetBlockEntity(m_PosX, m_PosY + 1, m_PosZ))) + cChestEntity * Chest = (cChestEntity *)a_Chunk.GetBlockEntity(m_PosX, m_PosY + 1, m_PosZ); + if (Chest == NULL) + { + LOGWARNING("%s: A chest entity was not found where expected, at {%d, %d, %d}", __FUNCTION__, m_PosX, m_PosY + 1, m_PosZ); + return false; + } + if (MoveItemsFromGrid(*Chest)) { // Moved the item from the chest directly above the hopper return true; @@ -389,9 +402,17 @@ bool cHopperEntity::MoveItemsFromChest(cChunk & a_Chunk) { continue; } - if (MoveItemsFromGrid(*(cChestEntity *)Neighbor->GetBlockEntity(x, m_PosY, z))) + Chest = (cChestEntity *)Neighbor->GetBlockEntity(m_PosX + Coords[i].x, m_PosY + 1, m_PosZ + Coords[i].z); + if (Chest == NULL) { - return true; + LOGWARNING("%s: A chest entity was not found where expected, at {%d, %d, %d}", __FUNCTION__, m_PosX + Coords[i].x, m_PosY + 1, m_PosZ + Coords[i].z); + } + else + { + if (MoveItemsFromGrid(*Chest)) + { + return true; + } } return false; } @@ -408,7 +429,11 @@ bool cHopperEntity::MoveItemsFromChest(cChunk & a_Chunk) bool cHopperEntity::MoveItemsFromFurnace(cChunk & a_Chunk) { cFurnaceEntity * Furnace = (cFurnaceEntity *)a_Chunk.GetBlockEntity(m_PosX, m_PosY + 1, m_PosZ); - ASSERT(Furnace != NULL); + if (Furnace == NULL) + { + LOGWARNING("%s: A furnace entity was not found where expected, at {%d, %d, %d}", __FUNCTION__, m_PosX, m_PosY + 1, m_PosZ); + return false; + } // Try move from the output slot: if (MoveItemsFromSlot(*Furnace, cFurnaceEntity::fsOutput, true)) @@ -517,7 +542,13 @@ bool cHopperEntity::MoveItemsFromSlot(cBlockEntityWithItems & a_Entity, int a_Sl bool cHopperEntity::MoveItemsToChest(cChunk & a_Chunk, int a_BlockX, int a_BlockY, int a_BlockZ) { // Try the chest directly connected to the hopper: - if (MoveItemsToGrid(*(cChestEntity *)a_Chunk.GetBlockEntity(a_BlockX, a_BlockY, a_BlockZ))) + cChestEntity * Chest = (cChestEntity *)a_Chunk.GetBlockEntity(a_BlockX, a_BlockY, a_BlockZ); + if (Chest == NULL) + { + LOGWARNING("%s: A chest entity was not found where expected, at {%d, %d, %d}", __FUNCTION__, a_BlockX, a_BlockY, a_BlockZ); + return false; + } + if (MoveItemsToGrid(*Chest)) { return true; } @@ -534,19 +565,27 @@ bool cHopperEntity::MoveItemsToChest(cChunk & a_Chunk, int a_BlockX, int a_Block {0, 1}, {0, -1}, } ; + int RelX = a_BlockX - a_Chunk.GetPosX() * cChunkDef::Width; + int RelZ = a_BlockZ - a_Chunk.GetPosZ() * cChunkDef::Width; for (size_t i = 0; i < ARRAYCOUNT(Coords); i++) { - int x = m_RelX + Coords[i].x; - int z = m_RelZ + Coords[i].z; + int x = RelX + Coords[i].x; + int z = RelZ + Coords[i].z; cChunk * Neighbor = a_Chunk.GetRelNeighborChunkAdjustCoords(x, z); if ( (Neighbor == NULL) || - (Neighbor->GetBlock(x, m_PosY + 1, z) != E_BLOCK_CHEST) + (Neighbor->GetBlock(x, a_BlockY, z) != E_BLOCK_CHEST) ) { continue; } - if (MoveItemsToGrid(*(cChestEntity *)Neighbor->GetBlockEntity(a_BlockX, a_BlockY, a_BlockZ))) + Chest = (cChestEntity *)Neighbor->GetBlockEntity(a_BlockX + Coords[i].x, a_BlockY, a_BlockZ + Coords[i].z); + if (Chest == NULL) + { + LOGWARNING("%s: A chest entity was not found where expected, at {%d, %d, %d} (%d, %d)", __FUNCTION__, a_BlockX + Coords[i].x, a_BlockY, a_BlockZ + Coords[i].z, x, z); + continue; + } + if (MoveItemsToGrid(*Chest)) { return true; } -- cgit v1.2.3