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package com.seaofnodes.simple;
import com.seaofnodes.isa.eval.EvalRisc5;
import com.seaofnodes.isa.eval.EvalArm64;
import java.io.IOException;
import org.junit.Test;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.fail;
public class BrainFuckTest {
@Test public void testBrainFuck() throws IOException {
String brain_fuck = "Hello World!\n";
String src =
"""
// -*- mode: java; -*-
val brain_fuck = { ->
var !program = "++++++++[>++++[>++>+++>+++>+<<<<-]>+>+>->>+[<]<-]>>.>---.+++++++..+++.>>.<-.<.+++.------.--------.>>+.>++.";
int d = 0;
u8[] !output = new u8[0];
u8[] !data = new u8[100];
for( int pc = 0; pc < program#; pc++ ) {
var command = program[pc];
if (command == '>') {
d++;
} else if (command == '<') {
d--;
} else if (command == '+') {
data[d]++;
} else if (command == '-') {
data[d]--;
} else if (command == '.') {
// Output a byte; increase the output array size
var old = output;
output = new u8[output# + 1];
for( int i = 0; i < old#; i++ )
output[i] = old[i];
output[old#] = data[d]; // Add the extra byte on the end
} else if (command == ',') {
data[d] = 42;
} else if (command == '[') {
if (data[d] == 0) {
for( int d = 1; d > 0; ) {
command = program[++pc];
if (command == 91) d++;
if (command == 93) d--;
}
}
} else if (command == ']') {
if (data[d]) {
for( int d = 1; d > 0; ) {
command = program[--pc];
if (command == 93) d++;
if (command == 91) d--;
}
}
}
}
return output;
};
""";
TestC.runC(src,"brain_fuck", brain_fuck, 40);
EvalRisc5 R5 = TestRisc5.build( src, "brain_fuck", 0, 25, false);
int trap = R5.step(100000);
assertEquals(0,trap);
int ptr = (int)R5.regs[com.seaofnodes.simple.node.cpus.riscv.riscv.A0];
assertEquals(brain_fuck.length(),R5.ld4s(ptr));
for( int i=0; i<brain_fuck.length(); i++ )
assertEquals(brain_fuck.charAt(i), R5.ld1z(ptr+4+i));
EvalArm64 A5 = TestArm64.build("brain_fuck", src, 0, 28, false);
int trap_arm = A5.step(100000);
assertEquals(0,trap_arm);
assertEquals(0,trap);
int ptr_arm = (int)A5.regs[com.seaofnodes.simple.node.cpus.arm.arm.X0];
assertEquals(brain_fuck.length(),A5.ld4s(ptr_arm));
for( int i=0; i<brain_fuck.length(); i++ )
assertEquals(brain_fuck.charAt(i), A5.ld1z(ptr_arm+4+i));
}
}
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