tiny.trace.TraceReaderCapacity

1pub const Capacity = struct {2    root_path_bytes: usize,3    root_path_offset: usize,4    event_bytes: usize,5    chunk_bytes: usize,6    block_bytes: usize,7    input_bytes: usize,8    input_offset: usize,9    path_bytes: usize,10    path_offset: usize,11    json_nesting: usize,12    json_stack_bytes: usize,13    json_stack_offset: usize,14    database: database.Capacity,15    sql_bytes: usize,16    sql_offset: usize,17    storage_bytes: usize,1819    pub fn derive(limits: Limits) DeriveError!Capacity {20        if (limits.root_path_bytes == 0) return error.RootPathStorageTooSmall;21        if (limits.event_bytes == 0) return error.EventStorageTooSmall;22        if (limits.event_bytes > format.Limits.maximum_event_bytes) return error.EventStorageTooLarge;23        if (limits.chunk_bytes < limits.event_bytes) return error.ChunkAdmissionTooSmall;24        if (limits.chunk_bytes > format.Limits.maximum_chunk_bytes) return error.ChunkAdmissionTooLarge;25        if (limits.json_nesting < 2) return error.JsonNestingTooSmall;26        if (limits.json_nesting > maximum_json_nesting) return error.JsonNestingTooLarge;27        const block_bytes = block.capacity(limits.event_bytes) catch return error.CapacityOverflow;28        const database_capacity = database.readerCapacity() catch return error.CapacityOverflow;2930        var offset: usize = 0;31        const root_path_offset = offset;32        offset = try add(offset, limits.root_path_bytes);33        const input_offset = offset;34        const input_bytes = @max(block_bytes, format.max_manifest_bytes);35        offset = try add(offset, input_bytes);36        const path_offset = offset;37        const path_bytes = try add(38            try add(limits.root_path_bytes, 1),39            format.max_relative_path_bytes,40        );41        offset = try add(offset, path_bytes);42        const json_stack_offset = offset;43        const json_stack_bytes = (try add(limits.json_nesting, 7)) / 8;44        offset = try add(offset, json_stack_bytes);45        const sql_offset = offset;46        offset = try add(offset, database_capacity.heap_bytes);47        return .{48            .root_path_bytes = limits.root_path_bytes,49            .root_path_offset = root_path_offset,50            .event_bytes = limits.event_bytes,51            .chunk_bytes = limits.chunk_bytes,52            .block_bytes = block_bytes,53            .input_bytes = input_bytes,54            .input_offset = input_offset,55            .path_bytes = path_bytes,56            .path_offset = path_offset,57            .json_nesting = limits.json_nesting,58            .json_stack_bytes = json_stack_bytes,59            .json_stack_offset = json_stack_offset,60            .database = database_capacity,61            .sql_bytes = database_capacity.heap_bytes,62            .sql_offset = sql_offset,63            .storage_bytes = offset,64        };65    }66};

1pub const TraceReaderCapacity = store.ReaderCapacity;