tiny.trace.TraceWriterCapacity

1pub const Capacity = struct {2    root_path_bytes: usize,3    root_path_offset: usize,4    target_triple_bytes: usize,5    target_triple_offset: usize,6    build_id_bytes: usize,7    build_id_offset: usize,8    mode_bytes: usize,9    mode_offset: usize,10    endian_bytes: usize,11    endian_offset: usize,12    scratch_bytes: usize,13    scratch_offset: usize,14    event_bytes: usize,15    block_bytes: usize,16    block_offset: usize,17    manifest_io_bytes: usize,18    manifest_io_offset: usize,19    manifest_bytes: usize,20    manifest_offset: usize,21    database: database.Capacity,22    sql_bytes: usize,23    sql_offset: usize,24    path_bytes: usize,25    path_offsets: [path_buffer_count]usize,26    storage_bytes: usize,2728    pub fn derive(limits: Limits) DeriveError!Capacity {29        if (limits.root_path_bytes == 0) return error.RootPathStorageTooSmall;30        if (limits.event_bytes == 0) return error.EventStorageTooSmall;31        if (limits.event_bytes > format.Limits.maximum_event_bytes) return error.EventStorageTooLarge;32        if (limits.manifest_io_bytes == 0) return error.ManifestIoStorageTooSmall;33        const block_bytes = block.capacity(limits.event_bytes) catch return error.CapacityOverflow;34        const database_capacity = database.writerCapacity(block_bytes) catch return error.CapacityOverflow;3536        var offset: usize = 0;37        const root_path_offset = offset;38        offset = try add(offset, limits.root_path_bytes);39        const target_triple_offset = offset;40        offset = try add(offset, limits.target_triple_bytes);41        const build_id_offset = offset;42        offset = try add(offset, limits.build_id_bytes);43        const mode_offset = offset;44        offset = try add(offset, limits.mode_bytes);45        const endian_offset = offset;46        offset = try add(offset, limits.endian_bytes);47        const scratch_offset = offset;48        const scratch_bytes = @max(block_bytes, format.max_manifest_bytes);49        offset = try add(offset, scratch_bytes);50        const manifest_io_offset = offset;51        offset = try add(offset, limits.manifest_io_bytes);52        const sql_offset = offset;53        offset = try add(offset, database_capacity.heap_bytes);54        const path_bytes = try add(55            try add(limits.root_path_bytes, 1),56            format.max_relative_path_bytes,57        );58        var path_offsets: [path_buffer_count]usize = undefined;59        for (&path_offsets) |*path_offset| {60            path_offset.* = offset;61            offset = try add(offset, path_bytes);62        }63        return .{64            .root_path_bytes = limits.root_path_bytes,65            .root_path_offset = root_path_offset,66            .target_triple_bytes = limits.target_triple_bytes,67            .target_triple_offset = target_triple_offset,68            .build_id_bytes = limits.build_id_bytes,69            .build_id_offset = build_id_offset,70            .mode_bytes = limits.mode_bytes,71            .mode_offset = mode_offset,72            .endian_bytes = limits.endian_bytes,73            .endian_offset = endian_offset,74            .scratch_bytes = scratch_bytes,75            .scratch_offset = scratch_offset,76            .event_bytes = limits.event_bytes,77            .block_bytes = block_bytes,78            .block_offset = scratch_offset,79            .manifest_io_bytes = limits.manifest_io_bytes,80            .manifest_io_offset = manifest_io_offset,81            .manifest_bytes = format.max_manifest_bytes,82            .manifest_offset = scratch_offset,83            .database = database_capacity,84            .sql_bytes = database_capacity.heap_bytes,85            .sql_offset = sql_offset,86            .path_bytes = path_bytes,87            .path_offsets = path_offsets,88            .storage_bytes = offset,89        };90    }91};

1pub const TraceWriterCapacity = store.WriterCapacity;