zig/mach
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

ecs: fix padding and data copy in setCapacity()

Browse source
This commit is contained in:
dweiller 2022-06-13 00:34:26 +10:00 • committed by Stephen Gutekanst
parent 390b8bd922
commit f6d29e7669
1 changed files with 10 additions and 5 deletions
Download patch file Download diff file Expand all files Collapse all files

17
ecs/src/entities.zig
View file

@ -151,17 +151,22 @@ pub const ArchetypeStorage = struct {
new_capacity_bytes += new_capacity * column.size;
}
const new_block = try gpa.alloc(u8, new_capacity_bytes);
if (storage.capacity > 0) mem.copy(u8, new_block, storage.block);
storage.block = new_block;
storage.capacity = @intCast(u32, new_capacity);
var offset: usize = 0;
for (storage.columns) |*column| {
const padding = column.alignment - (@ptrToInt(&storage.block[offset]) % column.alignment);
const align_mod = @ptrToInt(&new_block[offset]) % column.alignment;
const padding = if (align_mod == 0) 0 else column.alignment - align_mod;
offset += padding;
column.offset = offset;
offset += storage.capacity * column.size;
if (storage.capacity > 0) {
const slice = storage.block[column.offset .. column.offset + storage.capacity * column.size];
mem.copy(u8, new_block[offset..], slice);
}
column.offset = offset;
offset += new_capacity * column.size;
}
storage.block = new_block;
storage.capacity = @intCast(u32, new_capacity);
}
/// Sets the entire row's values in the table.