diff --git a/src/runtime/js.zig b/src/runtime/js.zig index aae49029..ca93ece6 100644 --- a/src/runtime/js.zig +++ b/src/runtime/js.zig @@ -976,6 +976,7 @@ pub fn Env(comptime State: type, comptime WebApis: type) type { // need this sentinel check to keep the compiler happy if (ptr.sentinel() == null) { if (force_u8 or js_value.isUint8Array() or js_value.isUint8ClampedArray()) { + if (byte_len == 0) return &[_]u8{}; const arr_ptr = @as([*]u8, @alignCast(@ptrCast(data))); return arr_ptr[0..byte_len]; } @@ -983,42 +984,49 @@ pub fn Env(comptime State: type, comptime WebApis: type) type { }, i8 => { if (js_value.isInt8Array()) { + if (byte_len == 0) return &[_]i8{}; const arr_ptr = @as([*]i8, @alignCast(@ptrCast(data))); return arr_ptr[0..byte_len]; } }, u16 => { if (js_value.isUint16Array()) { + if (byte_len == 0) return &[_]u16{}; const arr_ptr = @as([*]u16, @alignCast(@ptrCast(data))); return arr_ptr[0 .. byte_len / 2]; } }, i16 => { if (js_value.isInt16Array()) { + if (byte_len == 0) return &[_]i16{}; const arr_ptr = @as([*]i16, @alignCast(@ptrCast(data))); return arr_ptr[0 .. byte_len / 2]; } }, u32 => { if (js_value.isUint32Array()) { + if (byte_len == 0) return &[_]u32{}; const arr_ptr = @as([*]u32, @alignCast(@ptrCast(data))); return arr_ptr[0 .. byte_len / 4]; } }, i32 => { if (js_value.isInt32Array()) { + if (byte_len == 0) return &[_]i32{}; const arr_ptr = @as([*]i32, @alignCast(@ptrCast(data))); return arr_ptr[0 .. byte_len / 4]; } }, u64 => { if (js_value.isBigUint64Array()) { + if (byte_len == 0) return &[_]u64{}; const arr_ptr = @as([*]u64, @alignCast(@ptrCast(data))); return arr_ptr[0 .. byte_len / 8]; } }, i64 => { if (js_value.isBigInt64Array()) { + if (byte_len == 0) return &[_]i64{}; const arr_ptr = @as([*]i64, @alignCast(@ptrCast(data))); return arr_ptr[0 .. byte_len / 8]; } diff --git a/src/runtime/test_primitive_types.zig b/src/runtime/test_primitive_types.zig index f9989e3f..ec3fab73 100644 --- a/src/runtime/test_primitive_types.zig +++ b/src/runtime/test_primitive_types.zig @@ -281,6 +281,10 @@ test "JS: primitive types" { // typed arrays try runner.testCases(&.{ + .{ "let empty_arr = new Int8Array([]);", "undefined" }, + .{ "p.int8(empty_arr)", "undefined" }, + .{ "empty_arr;", "" }, + .{ "let arr_i8 = new Int8Array([-10, -20, -30]);", "undefined" }, .{ "p.int8(arr_i8)", "undefined" }, .{ "arr_i8;", "-13,-23,-33" },