592 lines
20 KiB
Zig
592 lines
20 KiB
Zig
const std = @import("std.zig");
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const io = std.io;
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const meta = std.meta;
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const trait = std.trait;
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const DefaultPrng = std.rand.DefaultPrng;
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const expect = std.testing.expect;
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const expectError = std.testing.expectError;
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const mem = std.mem;
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const os = std.os;
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const builtin = @import("builtin");
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test "write a file, read it, then delete it" {
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var raw_bytes: [200 * 1024]u8 = undefined;
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var allocator = &std.heap.FixedBufferAllocator.init(raw_bytes[0..]).allocator;
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var data: [1024]u8 = undefined;
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var prng = DefaultPrng.init(1234);
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prng.random.bytes(data[0..]);
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const tmp_file_name = "temp_test_file.txt";
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{
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var file = try os.File.openWrite(tmp_file_name);
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defer file.close();
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var file_out_stream = file.outStream();
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var buf_stream = io.BufferedOutStream(os.File.WriteError).init(&file_out_stream.stream);
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const st = &buf_stream.stream;
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try st.print("begin");
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try st.write(data[0..]);
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try st.print("end");
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try buf_stream.flush();
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}
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{
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// make sure openWriteNoClobber doesn't harm the file
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if (os.File.openWriteNoClobber(tmp_file_name, os.File.default_mode)) |file| {
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unreachable;
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} else |err| {
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std.debug.assert(err == os.File.OpenError.PathAlreadyExists);
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}
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}
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{
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var file = try os.File.openRead(tmp_file_name);
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defer file.close();
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const file_size = try file.getEndPos();
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const expected_file_size = "begin".len + data.len + "end".len;
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expect(file_size == expected_file_size);
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var file_in_stream = file.inStream();
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var buf_stream = io.BufferedInStream(os.File.ReadError).init(&file_in_stream.stream);
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const st = &buf_stream.stream;
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const contents = try st.readAllAlloc(allocator, 2 * 1024);
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defer allocator.free(contents);
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expect(mem.eql(u8, contents[0.."begin".len], "begin"));
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expect(mem.eql(u8, contents["begin".len .. contents.len - "end".len], data));
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expect(mem.eql(u8, contents[contents.len - "end".len ..], "end"));
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}
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try os.deleteFile(tmp_file_name);
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}
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test "BufferOutStream" {
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var bytes: [100]u8 = undefined;
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var allocator = &std.heap.FixedBufferAllocator.init(bytes[0..]).allocator;
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var buffer = try std.Buffer.initSize(allocator, 0);
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var buf_stream = &std.io.BufferOutStream.init(&buffer).stream;
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const x: i32 = 42;
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const y: i32 = 1234;
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try buf_stream.print("x: {}\ny: {}\n", x, y);
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expect(mem.eql(u8, buffer.toSlice(), "x: 42\ny: 1234\n"));
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}
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test "SliceInStream" {
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const bytes = []const u8{ 1, 2, 3, 4, 5, 6, 7 };
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var ss = io.SliceInStream.init(bytes);
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var dest: [4]u8 = undefined;
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var read = try ss.stream.read(dest[0..4]);
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expect(read == 4);
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expect(mem.eql(u8, dest[0..4], bytes[0..4]));
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read = try ss.stream.read(dest[0..4]);
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expect(read == 3);
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expect(mem.eql(u8, dest[0..3], bytes[4..7]));
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read = try ss.stream.read(dest[0..4]);
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expect(read == 0);
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}
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test "PeekStream" {
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const bytes = []const u8{ 1, 2, 3, 4, 5, 6, 7, 8 };
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var ss = io.SliceInStream.init(bytes);
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var ps = io.PeekStream(2, io.SliceInStream.Error).init(&ss.stream);
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var dest: [4]u8 = undefined;
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ps.putBackByte(9);
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ps.putBackByte(10);
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var read = try ps.stream.read(dest[0..4]);
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expect(read == 4);
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expect(dest[0] == 10);
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expect(dest[1] == 9);
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expect(mem.eql(u8, dest[2..4], bytes[0..2]));
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read = try ps.stream.read(dest[0..4]);
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expect(read == 4);
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expect(mem.eql(u8, dest[0..4], bytes[2..6]));
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read = try ps.stream.read(dest[0..4]);
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expect(read == 2);
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expect(mem.eql(u8, dest[0..2], bytes[6..8]));
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ps.putBackByte(11);
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ps.putBackByte(12);
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read = try ps.stream.read(dest[0..4]);
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expect(read == 2);
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expect(dest[0] == 12);
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expect(dest[1] == 11);
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}
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test "SliceOutStream" {
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var buffer: [10]u8 = undefined;
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var ss = io.SliceOutStream.init(buffer[0..]);
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try ss.stream.write("Hello");
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expect(mem.eql(u8, ss.getWritten(), "Hello"));
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try ss.stream.write("world");
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expect(mem.eql(u8, ss.getWritten(), "Helloworld"));
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expectError(error.OutOfSpace, ss.stream.write("!"));
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expect(mem.eql(u8, ss.getWritten(), "Helloworld"));
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ss.reset();
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expect(ss.getWritten().len == 0);
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expectError(error.OutOfSpace, ss.stream.write("Hello world!"));
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expect(mem.eql(u8, ss.getWritten(), "Hello worl"));
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}
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test "BitInStream" {
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const mem_be = []u8{ 0b11001101, 0b00001011 };
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const mem_le = []u8{ 0b00011101, 0b10010101 };
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var mem_in_be = io.SliceInStream.init(mem_be[0..]);
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const InError = io.SliceInStream.Error;
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var bit_stream_be = io.BitInStream(builtin.Endian.Big, InError).init(&mem_in_be.stream);
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var out_bits: usize = undefined;
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expect(1 == try bit_stream_be.readBits(u2, 1, &out_bits));
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expect(out_bits == 1);
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expect(2 == try bit_stream_be.readBits(u5, 2, &out_bits));
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expect(out_bits == 2);
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expect(3 == try bit_stream_be.readBits(u128, 3, &out_bits));
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expect(out_bits == 3);
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expect(4 == try bit_stream_be.readBits(u8, 4, &out_bits));
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expect(out_bits == 4);
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expect(5 == try bit_stream_be.readBits(u9, 5, &out_bits));
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expect(out_bits == 5);
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expect(1 == try bit_stream_be.readBits(u1, 1, &out_bits));
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expect(out_bits == 1);
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mem_in_be.pos = 0;
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bit_stream_be.bit_count = 0;
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expect(0b110011010000101 == try bit_stream_be.readBits(u15, 15, &out_bits));
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expect(out_bits == 15);
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mem_in_be.pos = 0;
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bit_stream_be.bit_count = 0;
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expect(0b1100110100001011 == try bit_stream_be.readBits(u16, 16, &out_bits));
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expect(out_bits == 16);
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_ = try bit_stream_be.readBits(u0, 0, &out_bits);
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expect(0 == try bit_stream_be.readBits(u1, 1, &out_bits));
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expect(out_bits == 0);
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expectError(error.EndOfStream, bit_stream_be.readBitsNoEof(u1, 1));
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var mem_in_le = io.SliceInStream.init(mem_le[0..]);
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var bit_stream_le = io.BitInStream(builtin.Endian.Little, InError).init(&mem_in_le.stream);
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expect(1 == try bit_stream_le.readBits(u2, 1, &out_bits));
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expect(out_bits == 1);
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expect(2 == try bit_stream_le.readBits(u5, 2, &out_bits));
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expect(out_bits == 2);
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expect(3 == try bit_stream_le.readBits(u128, 3, &out_bits));
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expect(out_bits == 3);
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expect(4 == try bit_stream_le.readBits(u8, 4, &out_bits));
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expect(out_bits == 4);
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expect(5 == try bit_stream_le.readBits(u9, 5, &out_bits));
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expect(out_bits == 5);
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expect(1 == try bit_stream_le.readBits(u1, 1, &out_bits));
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expect(out_bits == 1);
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mem_in_le.pos = 0;
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bit_stream_le.bit_count = 0;
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expect(0b001010100011101 == try bit_stream_le.readBits(u15, 15, &out_bits));
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expect(out_bits == 15);
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mem_in_le.pos = 0;
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bit_stream_le.bit_count = 0;
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expect(0b1001010100011101 == try bit_stream_le.readBits(u16, 16, &out_bits));
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expect(out_bits == 16);
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_ = try bit_stream_le.readBits(u0, 0, &out_bits);
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expect(0 == try bit_stream_le.readBits(u1, 1, &out_bits));
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expect(out_bits == 0);
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expectError(error.EndOfStream, bit_stream_le.readBitsNoEof(u1, 1));
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}
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test "BitOutStream" {
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var mem_be = []u8{0} ** 2;
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var mem_le = []u8{0} ** 2;
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var mem_out_be = io.SliceOutStream.init(mem_be[0..]);
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const OutError = io.SliceOutStream.Error;
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var bit_stream_be = io.BitOutStream(builtin.Endian.Big, OutError).init(&mem_out_be.stream);
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try bit_stream_be.writeBits(u2(1), 1);
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try bit_stream_be.writeBits(u5(2), 2);
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try bit_stream_be.writeBits(u128(3), 3);
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try bit_stream_be.writeBits(u8(4), 4);
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try bit_stream_be.writeBits(u9(5), 5);
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try bit_stream_be.writeBits(u1(1), 1);
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expect(mem_be[0] == 0b11001101 and mem_be[1] == 0b00001011);
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mem_out_be.pos = 0;
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try bit_stream_be.writeBits(u15(0b110011010000101), 15);
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try bit_stream_be.flushBits();
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expect(mem_be[0] == 0b11001101 and mem_be[1] == 0b00001010);
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mem_out_be.pos = 0;
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try bit_stream_be.writeBits(u32(0b110011010000101), 16);
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expect(mem_be[0] == 0b01100110 and mem_be[1] == 0b10000101);
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try bit_stream_be.writeBits(u0(0), 0);
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var mem_out_le = io.SliceOutStream.init(mem_le[0..]);
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var bit_stream_le = io.BitOutStream(builtin.Endian.Little, OutError).init(&mem_out_le.stream);
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try bit_stream_le.writeBits(u2(1), 1);
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try bit_stream_le.writeBits(u5(2), 2);
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try bit_stream_le.writeBits(u128(3), 3);
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try bit_stream_le.writeBits(u8(4), 4);
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try bit_stream_le.writeBits(u9(5), 5);
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try bit_stream_le.writeBits(u1(1), 1);
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expect(mem_le[0] == 0b00011101 and mem_le[1] == 0b10010101);
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mem_out_le.pos = 0;
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try bit_stream_le.writeBits(u15(0b110011010000101), 15);
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try bit_stream_le.flushBits();
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expect(mem_le[0] == 0b10000101 and mem_le[1] == 0b01100110);
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mem_out_le.pos = 0;
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try bit_stream_le.writeBits(u32(0b1100110100001011), 16);
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expect(mem_le[0] == 0b00001011 and mem_le[1] == 0b11001101);
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try bit_stream_le.writeBits(u0(0), 0);
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}
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test "BitStreams with File Stream" {
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const tmp_file_name = "temp_test_file.txt";
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{
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var file = try os.File.openWrite(tmp_file_name);
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defer file.close();
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var file_out = file.outStream();
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var file_out_stream = &file_out.stream;
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const OutError = os.File.WriteError;
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var bit_stream = io.BitOutStream(builtin.endian, OutError).init(file_out_stream);
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try bit_stream.writeBits(u2(1), 1);
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try bit_stream.writeBits(u5(2), 2);
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try bit_stream.writeBits(u128(3), 3);
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try bit_stream.writeBits(u8(4), 4);
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try bit_stream.writeBits(u9(5), 5);
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try bit_stream.writeBits(u1(1), 1);
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try bit_stream.flushBits();
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}
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{
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var file = try os.File.openRead(tmp_file_name);
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defer file.close();
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var file_in = file.inStream();
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var file_in_stream = &file_in.stream;
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const InError = os.File.ReadError;
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var bit_stream = io.BitInStream(builtin.endian, InError).init(file_in_stream);
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var out_bits: usize = undefined;
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expect(1 == try bit_stream.readBits(u2, 1, &out_bits));
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expect(out_bits == 1);
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expect(2 == try bit_stream.readBits(u5, 2, &out_bits));
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expect(out_bits == 2);
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expect(3 == try bit_stream.readBits(u128, 3, &out_bits));
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expect(out_bits == 3);
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expect(4 == try bit_stream.readBits(u8, 4, &out_bits));
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expect(out_bits == 4);
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expect(5 == try bit_stream.readBits(u9, 5, &out_bits));
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expect(out_bits == 5);
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expect(1 == try bit_stream.readBits(u1, 1, &out_bits));
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expect(out_bits == 1);
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expectError(error.EndOfStream, bit_stream.readBitsNoEof(u1, 1));
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}
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try os.deleteFile(tmp_file_name);
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}
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fn testIntSerializerDeserializer(comptime endian: builtin.Endian, comptime is_packed: bool) !void {
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//@NOTE: if this test is taking too long, reduce the maximum tested bitsize
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const max_test_bitsize = 128;
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const total_bytes = comptime blk: {
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var bytes = 0;
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comptime var i = 0;
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while (i <= max_test_bitsize) : (i += 1) bytes += (i / 8) + @boolToInt(i % 8 > 0);
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break :blk bytes * 2;
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};
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var data_mem: [total_bytes]u8 = undefined;
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var out = io.SliceOutStream.init(data_mem[0..]);
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const OutError = io.SliceOutStream.Error;
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var out_stream = &out.stream;
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var serializer = io.Serializer(endian, is_packed, OutError).init(out_stream);
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var in = io.SliceInStream.init(data_mem[0..]);
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const InError = io.SliceInStream.Error;
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var in_stream = &in.stream;
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var deserializer = io.Deserializer(endian, is_packed, InError).init(in_stream);
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comptime var i = 0;
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inline while (i <= max_test_bitsize) : (i += 1) {
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const U = @IntType(false, i);
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const S = @IntType(true, i);
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try serializer.serializeInt(U(i));
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if (i != 0) try serializer.serializeInt(S(-1)) else try serializer.serialize(S(0));
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}
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try serializer.flush();
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i = 0;
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inline while (i <= max_test_bitsize) : (i += 1) {
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const U = @IntType(false, i);
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const S = @IntType(true, i);
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const x = try deserializer.deserializeInt(U);
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const y = try deserializer.deserializeInt(S);
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expect(x == U(i));
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if (i != 0) expect(y == S(-1)) else expect(y == 0);
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}
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const u8_bit_count = comptime meta.bitCount(u8);
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//0 + 1 + 2 + ... n = (n * (n + 1)) / 2
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//and we have each for unsigned and signed, so * 2
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const total_bits = (max_test_bitsize * (max_test_bitsize + 1));
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const extra_packed_byte = @boolToInt(total_bits % u8_bit_count > 0);
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const total_packed_bytes = (total_bits / u8_bit_count) + extra_packed_byte;
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expect(in.pos == if (is_packed) total_packed_bytes else total_bytes);
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//Verify that empty error set works with serializer.
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//deserializer is covered by SliceInStream
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const NullError = io.NullOutStream.Error;
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var null_out = io.NullOutStream.init();
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var null_out_stream = &null_out.stream;
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var null_serializer = io.Serializer(endian, is_packed, NullError).init(null_out_stream);
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try null_serializer.serialize(data_mem[0..]);
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try null_serializer.flush();
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}
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test "Serializer/Deserializer Int" {
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try testIntSerializerDeserializer(builtin.Endian.Big, false);
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try testIntSerializerDeserializer(builtin.Endian.Little, false);
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// TODO these tests are disabled due to tripping an LLVM assertion
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// https://github.com/ziglang/zig/issues/2019
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//try testIntSerializerDeserializer(builtin.Endian.Big, true);
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//try testIntSerializerDeserializer(builtin.Endian.Little, true);
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}
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fn testIntSerializerDeserializerInfNaN(
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comptime endian: builtin.Endian,
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comptime is_packed: bool,
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) !void {
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const mem_size = (16 * 2 + 32 * 2 + 64 * 2 + 128 * 2) / comptime meta.bitCount(u8);
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var data_mem: [mem_size]u8 = undefined;
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var out = io.SliceOutStream.init(data_mem[0..]);
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const OutError = io.SliceOutStream.Error;
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var out_stream = &out.stream;
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var serializer = io.Serializer(endian, is_packed, OutError).init(out_stream);
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var in = io.SliceInStream.init(data_mem[0..]);
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const InError = io.SliceInStream.Error;
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var in_stream = &in.stream;
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var deserializer = io.Deserializer(endian, is_packed, InError).init(in_stream);
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//@TODO: isInf/isNan not currently implemented for f128.
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try serializer.serialize(std.math.nan(f16));
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try serializer.serialize(std.math.inf(f16));
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try serializer.serialize(std.math.nan(f32));
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try serializer.serialize(std.math.inf(f32));
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try serializer.serialize(std.math.nan(f64));
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try serializer.serialize(std.math.inf(f64));
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//try serializer.serialize(std.math.nan(f128));
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//try serializer.serialize(std.math.inf(f128));
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const nan_check_f16 = try deserializer.deserialize(f16);
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const inf_check_f16 = try deserializer.deserialize(f16);
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const nan_check_f32 = try deserializer.deserialize(f32);
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const inf_check_f32 = try deserializer.deserialize(f32);
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const nan_check_f64 = try deserializer.deserialize(f64);
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const inf_check_f64 = try deserializer.deserialize(f64);
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//const nan_check_f128 = try deserializer.deserialize(f128);
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//const inf_check_f128 = try deserializer.deserialize(f128);
|
|
expect(std.math.isNan(nan_check_f16));
|
|
expect(std.math.isInf(inf_check_f16));
|
|
expect(std.math.isNan(nan_check_f32));
|
|
expect(std.math.isInf(inf_check_f32));
|
|
expect(std.math.isNan(nan_check_f64));
|
|
expect(std.math.isInf(inf_check_f64));
|
|
//expect(std.math.isNan(nan_check_f128));
|
|
//expect(std.math.isInf(inf_check_f128));
|
|
}
|
|
|
|
test "Serializer/Deserializer Int: Inf/NaN" {
|
|
try testIntSerializerDeserializerInfNaN(builtin.Endian.Big, false);
|
|
try testIntSerializerDeserializerInfNaN(builtin.Endian.Little, false);
|
|
try testIntSerializerDeserializerInfNaN(builtin.Endian.Big, true);
|
|
try testIntSerializerDeserializerInfNaN(builtin.Endian.Little, true);
|
|
}
|
|
|
|
fn testAlternateSerializer(self: var, serializer: var) !void {
|
|
try serializer.serialize(self.f_f16);
|
|
}
|
|
|
|
fn testSerializerDeserializer(comptime endian: builtin.Endian, comptime is_packed: bool) !void {
|
|
const ColorType = enum(u4) {
|
|
RGB8 = 1,
|
|
RA16 = 2,
|
|
R32 = 3,
|
|
};
|
|
|
|
const TagAlign = union(enum(u32)) {
|
|
A: u8,
|
|
B: u8,
|
|
C: u8,
|
|
};
|
|
|
|
const Color = union(ColorType) {
|
|
RGB8: struct {
|
|
r: u8,
|
|
g: u8,
|
|
b: u8,
|
|
a: u8,
|
|
},
|
|
RA16: struct {
|
|
r: u16,
|
|
a: u16,
|
|
},
|
|
R32: u32,
|
|
};
|
|
|
|
const PackedStruct = packed struct {
|
|
f_i3: i3,
|
|
f_u2: u2,
|
|
};
|
|
|
|
//to test custom serialization
|
|
const Custom = struct {
|
|
f_f16: f16,
|
|
f_unused_u32: u32,
|
|
|
|
pub fn deserialize(self: *@This(), deserializer: var) !void {
|
|
try deserializer.deserializeInto(&self.f_f16);
|
|
self.f_unused_u32 = 47;
|
|
}
|
|
|
|
pub const serialize = testAlternateSerializer;
|
|
};
|
|
|
|
const MyStruct = struct {
|
|
f_i3: i3,
|
|
f_u8: u8,
|
|
f_tag_align: TagAlign,
|
|
f_u24: u24,
|
|
f_i19: i19,
|
|
f_void: void,
|
|
f_f32: f32,
|
|
f_f128: f128,
|
|
f_packed_0: PackedStruct,
|
|
f_i7arr: [10]i7,
|
|
f_of64n: ?f64,
|
|
f_of64v: ?f64,
|
|
f_color_type: ColorType,
|
|
f_packed_1: PackedStruct,
|
|
f_custom: Custom,
|
|
f_color: Color,
|
|
};
|
|
|
|
const my_inst = MyStruct{
|
|
.f_i3 = -1,
|
|
.f_u8 = 8,
|
|
.f_tag_align = TagAlign{ .B = 148 },
|
|
.f_u24 = 24,
|
|
.f_i19 = 19,
|
|
.f_void = {},
|
|
.f_f32 = 32.32,
|
|
.f_f128 = 128.128,
|
|
.f_packed_0 = PackedStruct{ .f_i3 = -1, .f_u2 = 2 },
|
|
.f_i7arr = [10]i7{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 },
|
|
.f_of64n = null,
|
|
.f_of64v = 64.64,
|
|
.f_color_type = ColorType.R32,
|
|
.f_packed_1 = PackedStruct{ .f_i3 = 1, .f_u2 = 1 },
|
|
.f_custom = Custom{ .f_f16 = 38.63, .f_unused_u32 = 47 },
|
|
.f_color = Color{ .R32 = 123822 },
|
|
};
|
|
|
|
var data_mem: [@sizeOf(MyStruct)]u8 = undefined;
|
|
var out = io.SliceOutStream.init(data_mem[0..]);
|
|
const OutError = io.SliceOutStream.Error;
|
|
var out_stream = &out.stream;
|
|
var serializer = io.Serializer(endian, is_packed, OutError).init(out_stream);
|
|
|
|
var in = io.SliceInStream.init(data_mem[0..]);
|
|
const InError = io.SliceInStream.Error;
|
|
var in_stream = &in.stream;
|
|
var deserializer = io.Deserializer(endian, is_packed, InError).init(in_stream);
|
|
|
|
try serializer.serialize(my_inst);
|
|
|
|
const my_copy = try deserializer.deserialize(MyStruct);
|
|
expect(meta.eql(my_copy, my_inst));
|
|
}
|
|
|
|
test "Serializer/Deserializer generic" {
|
|
try testSerializerDeserializer(builtin.Endian.Big, false);
|
|
try testSerializerDeserializer(builtin.Endian.Little, false);
|
|
try testSerializerDeserializer(builtin.Endian.Big, true);
|
|
try testSerializerDeserializer(builtin.Endian.Little, true);
|
|
}
|
|
|
|
fn testBadData(comptime endian: builtin.Endian, comptime is_packed: bool) !void {
|
|
const E = enum(u14) {
|
|
One = 1,
|
|
Two = 2,
|
|
};
|
|
|
|
const A = struct {
|
|
e: E,
|
|
};
|
|
|
|
const C = union(E) {
|
|
One: u14,
|
|
Two: f16,
|
|
};
|
|
|
|
var data_mem: [4]u8 = undefined;
|
|
var out = io.SliceOutStream.init(data_mem[0..]);
|
|
const OutError = io.SliceOutStream.Error;
|
|
var out_stream = &out.stream;
|
|
var serializer = io.Serializer(endian, is_packed, OutError).init(out_stream);
|
|
|
|
var in = io.SliceInStream.init(data_mem[0..]);
|
|
const InError = io.SliceInStream.Error;
|
|
var in_stream = &in.stream;
|
|
var deserializer = io.Deserializer(endian, is_packed, InError).init(in_stream);
|
|
|
|
try serializer.serialize(u14(3));
|
|
expectError(error.InvalidEnumTag, deserializer.deserialize(A));
|
|
out.pos = 0;
|
|
try serializer.serialize(u14(3));
|
|
try serializer.serialize(u14(88));
|
|
expectError(error.InvalidEnumTag, deserializer.deserialize(C));
|
|
}
|
|
|
|
test "Deserializer bad data" {
|
|
try testBadData(builtin.Endian.Big, false);
|
|
try testBadData(builtin.Endian.Little, false);
|
|
try testBadData(builtin.Endian.Big, true);
|
|
try testBadData(builtin.Endian.Little, true);
|
|
}
|