add streaming API

build.zig

@@ -1,7 +1,7 @@
 const Builder = std.build.Builder;
 const std = @import("std");
 pub fn build(b: *Builder) void {
-    const native_opt = b.option(bool, "native", "if many cpu, turn this on");
+    const native_opt = b.option(bool, "native", "if other people exist, turn this off");
     const option_libc = (b.option(bool, "libc", "build with libc?")) orelse false;
     const is_native = native_opt orelse true;
 
@@ -17,21 +17,32 @@ pub fn build(b: *Builder) void {
         });
     }
 
-    const mode = b.standardReleaseOptions();
+    const optimize = b.standardOptimizeOption(.{});
 
     // this exports both a library and a binary
 
-    const exe = b.addExecutable("zigdig", "src/main.zig");
-    exe.setTarget(target);
-    exe.setBuildMode(mode);
+    const exe = b.addExecutable(.{
+        .name = "zigdig",
+        .root_source_file = .{ .path = "src/main.zig" },
+        .target = target,
+        .optimize = optimize,
+    });
     if (option_libc) exe.linkLibC();
+    exe.install();
+
+    const exe_tinyhost = b.addExecutable(.{
+        .name = "zigdig-tiny",
+        .root_source_file = .{ .path = "src/main_tinyhost.zig" },
+        .target = target,
+        .optimize = optimize,
+    });
+    if (option_libc) exe.linkLibC();
+    exe_tinyhost.install();
 
-    const lib = b.addStaticLibrary("zigdig", "src/lib.zig");
-    lib.setTarget(target);
-    lib.setBuildMode(mode);
-
-    var lib_tests = b.addTest("src/main.zig");
-    lib_tests.setBuildMode(mode);
+    var lib_tests = b.addTest(.{
+        .root_source_file = .{ .path = "src/main.zig" },
+        .optimize = optimize,
+    });
 
     const test_step = b.step("test", "Run library tests");
     test_step.dependOn(&lib_tests.step);
@@ -40,12 +51,9 @@ pub fn build(b: *Builder) void {
     const run_step = b.step("run", "Run example binary");
     run_step.dependOn(&run_cmd.step);
 
-    b.default_step.dependOn(&lib.step);
-    b.default_step.dependOn(&exe.step);
-
-    lib.addPackagePath("dns", "src/lib.zig");
-    exe.addPackagePath("dns", "src/lib.zig");
-
-    b.installArtifact(lib);
+    b.addModule(.{
+        .name = "dns",
+        .source_file = .{ .path = "src/lib.zig" },
+    });
     b.installArtifact(exe);
 }

src/enums.zig

@@ -97,6 +97,17 @@ pub const ResourceClass = enum(u16) {
     HS = 4,
     WILDCARD = 255,
 
+    pub fn readFrom(reader: anytype) !@This() {
+        const resource_class_int = try reader.readIntBig(u16);
+        return std.meta.intToEnum(@This(), resource_class_int) catch |err| {
+            logger.err(
+                "unknown resource class {d}, got {s}",
+                .{ resource_class_int, @errorName(err) },
+            );
+            return err;
+        };
+    }
+
     pub fn writeTo(self: @This(), writer: anytype) !usize {
         try writer.writeIntBig(u16, @enumToInt(self));
         return 16 / 8;