From 67dc6202dee2ce983778ba3143cc3f00196aeb7c Mon Sep 17 00:00:00 2001 From: Cliff Click Date: Thu, 12 Sep 2024 11:13:31 -0700 Subject: Chapter 15: Arrays Co-authored-by: XmiliaH Co-authored-by: Thalia Archibald Co-authored-by: Robert Obkircher --- .../java/com/seaofnodes/simple/BrainFuckTest.java | 81 ++++++++++++++++++++++ 1 file changed, 81 insertions(+) create mode 100644 src/test/java/com/seaofnodes/simple/BrainFuckTest.java (limited to 'src/test/java/com/seaofnodes/simple/BrainFuckTest.java') diff --git a/src/test/java/com/seaofnodes/simple/BrainFuckTest.java b/src/test/java/com/seaofnodes/simple/BrainFuckTest.java new file mode 100644 index 00000000..f7c66bda --- /dev/null +++ b/src/test/java/com/seaofnodes/simple/BrainFuckTest.java @@ -0,0 +1,81 @@ +package com.seaofnodes.simple; + +import com.seaofnodes.simple.evaluator.Evaluator; +import com.seaofnodes.simple.node.StopNode; +import org.junit.Test; +import org.junit.Ignore; + +import java.nio.charset.StandardCharsets; + +import static org.junit.Assert.assertEquals; +import static org.junit.Assert.fail; + +public class BrainFuckTest { + + @Ignore + @Test + public void testBrainfuck() { + var program = "++++++++[>++++[>++>+++>+++>+<<<<-]>+>+>->>+[<]<-]>>.>---.+++++++..+++.>>.<-.<.+++.------.--------.>>+.>++.".getBytes(StandardCharsets.UTF_8); + var encoded = new StringBuilder("u8[] program = new u8[").append(program.length).append("];"); + for (int i = 0; i < program.length; i++) { + int value = program[i] & 0xFF; + encoded.append("program[").append(i).append("] = ").append(value).append(";"); + } + + Parser parser = new Parser( + encoded + """ +int pc = 0; +int d = 0; +u8[] data = new u8[100]; +u8[] output = new u8[0]; + +while (pc < program#) { + int command = program[pc]; + if (command == 62) { + d = d + 1; + } else if (command == 60) { + d = d - 1; + } else if (command == 43) { + data[d] = data[d] + 1; + } else if (command == 45) { + data[d] = data[d] - 1; + } else if (command == 46) { + u8[] old = output; + output = new u8[output# + 1]; + int i = 0; + while (i < old#) { + output[i] = old[i]; + i = i + 1; + } + output[i] = data[d]; + } else if (command == 44) { + data[d] = 42; + } else if (command == 91) { + if (data[d] == 0) { + int d = 1; + while (d > 0) { + pc = pc + 1; + command = program[pc]; + if (command == 91) d = d + 1; + if (command == 93) d = d - 1; + } + } + } else if (command == 93) { + if (data[d] != 0) { + int d = 1; + while (d > 0) { + pc = pc - 1; + command = program[pc]; + if (command == 93) d = d + 1; + if (command == 91) d = d - 1; + } + } + } + pc = pc + 1; +} +return output; + """); + StopNode stop = parser.parse(false).iterate(false); + assertEquals("Hello World!\n", Evaluator.evaluate(stop, 0, 10000).toString()); + } +} -- cgit v1.2.3