terminal: small stylistic tweaks

src/terminal/UTF8Decoder.zig

@@ -13,7 +13,7 @@ const testing = std.testing;
 
 const log = std.log.scoped(.utf8decoder);
 
-//zig fmt: off
+// zig fmt: off
 const char_classes = [_]u4{
    0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,  0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
    0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,  0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
@@ -32,7 +32,7 @@ const transitions = [_]u8 {
   12,12,12,12,12,12,12,36,12,36,12,12, 12,36,12,12,12,12,12,36,12,36,12,12,
   12,36,12,12,12,12,12,12,12,12,12,12,
 };
-//zig fmt: on
+// zig fmt: on
 
 // DFA states
 const ACCEPT_STATE = 0;
@@ -43,10 +43,6 @@ accumulator: u21 = 0,
 // The internal state of the DFA.
 state: u8 = ACCEPT_STATE,
 
-pub fn init() UTF8Decoder {
-    return .{};
-}
-
 /// Takes the next byte in the utf-8 sequence and emits a tuple of
 /// - The codepoint that was generated, if there is one.
 /// - A boolean that indicates whether the provided byte was consumed.
@@ -72,7 +68,8 @@ pub inline fn next(self: *UTF8Decoder, byte: u8) struct { ?u21, bool } {
     self.state = transitions[self.state + char_class];
 
     if (self.state == ACCEPT_STATE) {
-        defer { self.accumulator = 0; }
+        defer self.accumulator = 0;
+
         // Emit the fully decoded codepoint.
         return .{ self.accumulator, true };
     } else if (self.state == REJECT_STATE) {
@@ -88,8 +85,8 @@ pub inline fn next(self: *UTF8Decoder, byte: u8) struct { ?u21, bool } {
 }
 
 test "ASCII" {
-    var d = init();
-    var out = std.mem.zeroes([13]u8);
+    var d: UTF8Decoder = .{};
+    var out: [13]u8 = undefined;
     for ("Hello, World!", 0..) |byte, i| {
         const res = d.next(byte);
         try testing.expect(res[1]);
@@ -97,12 +94,13 @@ test "ASCII" {
             out[i] = @intCast(codepoint);
         }
     }
+
     try testing.expect(std.mem.eql(u8, &out, "Hello, World!"));
 }
 
 test "Well formed utf-8" {
-    var d = init();
-    var out = std.mem.zeroes([4]u21);
+    var d: UTF8Decoder = .{};
+    var out: [4]u21 = undefined;
     var i: usize = 0;
     // 4 bytes, 3 bytes, 2 bytes, 1 byte
     for ("😄✤ÁA") |byte| {
@@ -119,12 +117,13 @@ test "Well formed utf-8" {
             }
         }
     }
+
     try testing.expect(std.mem.eql(u21, &out, &[_]u21{ 0x1F604, 0x2724, 0xC1, 0x41 }));
 }
 
 test "Partially invalid utf-8" {
-    var d = init();
-    var out = std.mem.zeroes([5]u21);
+    var d: UTF8Decoder = .{};
+    var out: [5]u21 = undefined;
     var i: usize = 0;
     // Illegally terminated sequence, valid sequence, illegal surrogate pair.
     for ("\xF0\x9F😄\xED\xA0\x80") |byte| {
@@ -138,5 +137,6 @@ test "Partially invalid utf-8" {
             }
         }
     }
+
     try testing.expect(std.mem.eql(u21, &out, &[_]u21{ 0xFFFD, 0x1F604, 0xFFFD, 0xFFFD, 0xFFFD }));
 }

src/terminal/stream.zig

@@ -67,6 +67,7 @@ pub fn Stream(comptime Handler: type) type {
                 }
                 return;
             }
+
             const actions = self.parser.next(c);
             for (actions) |action_opt| {
                 const action = action_opt orelse continue;