Added while loop

README.md

@@ -1,2 +1,4 @@
 # Klang - The Kaiser language
-This is the project for Klang - the Kaiser language.
+This is the project for Klang - the Kaiser language.
+
+0 is false

makefile

@@ -18,7 +18,7 @@ runTest: ./src/test/test
 	./src/test/test
 	
 ./src/test/test: ./src/test/tests.s
-	gcc -o ./src/test/test ./src/test/tests.s ./src/test/functionCall/functionCall.c ./src/test/recursive/recursive.c ./src/test/comparison/comparison.c ./src/test/testCode.c
+	gcc -o ./src/test/test ./src/test/tests.s ./src/test/functionCall/functionCall.c ./src/test/while/while.c ./src/test/recursive/recursive.c ./src/test/comparison/comparison.c ./src/test/testCode.c
 
 ./src/test/tests.s: target/klang-1.0-jar-with-dependencies.jar
 	java -cp target/klang-1.0-jar-with-dependencies.jar de.hsrm.compiler.Klang.Klang < ./src/test/tests.k > ./src/test/tests.s

src/main/antlr4/de/hsrm/compiler/Klang/Klang.g4

@@ -26,6 +26,7 @@ statement
   | variable_declaration
   | variable_assignment
   | return_statement
+  | whileLoop
   ;
 
 print
@@ -79,12 +80,17 @@ arguments
   : (expression (COMMA expression)*)?
   ;
 
+whileLoop
+  : WHILE OPAR cond = expression CPAR braced_block
+  ;
+
 PRINT: 'print';
 IF: 'if';
 ELSE: 'else';
 FUNC: 'function';
 RETURN: 'return';
 LET: 'let';
+WHILE: 'while';
 
 SCOL: ';';
 OBRK: '{';

src/main/java/de/hsrm/compiler/Klang/ContextAnalysis.java

@@ -5,6 +5,7 @@ import java.util.HashSet;
 
 import de.hsrm.compiler.Klang.nodes.*;
 import de.hsrm.compiler.Klang.nodes.expressions.*;
+import de.hsrm.compiler.Klang.nodes.loops.whileLoop;
 import de.hsrm.compiler.Klang.nodes.statements.*;
 import de.hsrm.compiler.Klang.types.Type;
 
@@ -57,6 +58,14 @@ public class ContextAnalysis extends KlangBaseVisitor<Node> {
     }
   }
 
+  @Override
+  public Node visitWhileLoop(KlangParser.WhileLoopContext ctx) {
+    Node condition = this.visit(ctx.cond);
+    Node block = this.visit(ctx.braced_block());
+    return new whileLoop((Expression) condition, (Block) block);
+  }
+
+
   @Override
   public Node visitVariable_declaration(KlangParser.Variable_declarationContext ctx) {
     String name = ctx.IDENT().getText();

src/main/java/de/hsrm/compiler/Klang/nodes/loops/whileLoop.java

@@ -0,0 +1,24 @@
+package de.hsrm.compiler.Klang.nodes.loops;
+
+import de.hsrm.compiler.Klang.nodes.Block;
+import de.hsrm.compiler.Klang.nodes.statements.Statement;;
+import de.hsrm.compiler.Klang.nodes.expressions.Expression;
+import de.hsrm.compiler.Klang.visitors.Visitor;
+
+public class whileLoop extends Statement {
+
+    public Expression cond;
+    public Block block;
+    public Block alt;
+
+    public whileLoop(Expression cond, Block block) {
+        this.cond = cond;
+        this.block = block;
+    }
+
+    @Override
+    public <R> R welcome(Visitor<R> v) {
+        return v.visit(this);
+    }
+
+}

src/main/java/de/hsrm/compiler/Klang/visitors/EvalVisitor.java

@@ -8,6 +8,7 @@ import de.hsrm.compiler.Klang.nodes.Block;
 import de.hsrm.compiler.Klang.nodes.FunctionDefinition;
 import de.hsrm.compiler.Klang.nodes.Program;
 import de.hsrm.compiler.Klang.nodes.expressions.*;
+import de.hsrm.compiler.Klang.nodes.loops.whileLoop;
 import de.hsrm.compiler.Klang.nodes.statements.*;
 
 public class EvalVisitor implements Visitor<Value> {
@@ -151,6 +152,18 @@ public class EvalVisitor implements Visitor<Value> {
     return result;
   }
 
+  @Override
+  public Value visit(whileLoop e) {
+    Value condition = e.cond.welcome(this);
+    Value result = null;
+    while(condition.asInteger() != 0) {
+      System.out.println(condition.asInteger());
+      result = e.block.welcome(this);
+    }
+    
+    return result;
+  }
+ 
   @Override
   public Value visit(PrintStatement e) {
     Value value = e.expression.welcome(this);

src/main/java/de/hsrm/compiler/Klang/visitors/GenASM.java

@@ -8,6 +8,7 @@ import java.util.TreeSet;
 
 import de.hsrm.compiler.Klang.nodes.*;
 import de.hsrm.compiler.Klang.nodes.expressions.*;
+import de.hsrm.compiler.Klang.nodes.loops.whileLoop;
 import de.hsrm.compiler.Klang.nodes.statements.*;
 
 public class GenASM implements Visitor<Void> {
@@ -264,30 +265,44 @@ public class GenASM implements Visitor<Void> {
 
   @Override
   public Void visit(IfStatement e) {
-      int lblElse = ++lCount;
-      int lblEnd = ++lCount;
-      boolean hasElse = e.alt != null || e.elif != null;
-      e.cond.welcome(this);
-      this.ex.write("    cmp $0, %rax\n");
-      // in case of cond evaluating to false, jump to else/elif
-      // Jump to end if there is no else part, this saves a label declaration
-      if (hasElse) {
-        this.ex.write("    jz .L" + lblElse + "\n");
+    int lblElse = ++lCount;
+    int lblEnd = ++lCount;
+    boolean hasElse = e.alt != null || e.elif != null;
+    e.cond.welcome(this);
+    this.ex.write("    cmp $0, %rax\n");
+    // in case of cond evaluating to false, jump to else/elif
+    // Jump to end if there is no else part, this saves a label declaration
+    if (hasElse) {
+      this.ex.write("    jz .L" + lblElse + "\n");
+    } else {
+      this.ex.write("    jz .L" + lblEnd + "\n");
+    }
+    e.then.welcome(this);
+    if (hasElse) {
+      this.ex.write("    jmp .L" + lblEnd + "\n");
+      this.ex.write(".L" + lblElse + ":\n");
+      if (e.alt != null) {
+        e.alt.welcome(this);
       } else {
-        this.ex.write("    jz .L" + lblEnd + "\n");
+        e.elif.welcome(this);
       }
-      e.then.welcome(this);
-      if (hasElse) {
-        this.ex.write("    jmp .L" + lblEnd + "\n");
-        this.ex.write(".L" + lblElse + ":\n");
-        if (e.alt != null) {
-          e.alt.welcome(this);
-        } else {
-          e.elif.welcome(this);
-        }
-      }
-      this.ex.write(".L" + lblEnd + ":\n");
-      return null;
+    }
+    this.ex.write(".L" + lblEnd + ":\n");
+    return null;
+  }
+  
+  @Override
+  public Void visit(whileLoop e) {
+    int lblCond = ++lCount;
+    int lblEnd = ++lCount;
+    this.ex.write(".L" + lblCond + ":\n");
+    e.cond.welcome(this);
+    this.ex.write("    cmp $0, %rax\n");
+    this.ex.write("    jz .L" + lblEnd + "\n");
+    e.block.welcome(this);
+    this.ex.write("    jmp .L" + lblCond + "\n");
+    this.ex.write(".L" + lblEnd + ":\n");
+    return null;
   }
 
   @Override
@@ -351,10 +366,10 @@ public class GenASM implements Visitor<Void> {
     // Merke dir die offsets der parameter, die direkt auf den stack gelegt wurden
     int offset = 16; // Per Stack übergebene Parameter liegen über unserm BSP
     // Per stack übergebene variablen in env registrieren
-		for (int i = this.rs.length; i < e.parameters.length; i++) {
-			env.put(e.parameters[i], offset);
-			offset += 8;
-		}
+    for (int i = this.rs.length; i < e.parameters.length; i++) {
+      env.put(e.parameters[i], offset);
+      offset += 8;
+    }
 
     // pushe die aufrufparameter aus den Registern wieder auf den Stack
     offset = 0;
@@ -363,7 +378,7 @@ public class GenASM implements Visitor<Void> {
       offset -= 8;
       this.env.put(e.parameters[i], offset); // negative, liegt unter aktuellem BP
     }
-    
+
     // Reserviere Platz auf dem Stack für jede lokale variable
     for (String lok_var : vars) {
       offset -= 8;
@@ -384,7 +399,7 @@ public class GenASM implements Visitor<Void> {
     }
 
     // Den Rest auf den stack pushen
-    for (int i = e.arguments.length -1; i >= this.rs.length; i--) {
+    for (int i = e.arguments.length - 1; i >= this.rs.length; i--) {
       e.arguments[i].welcome(this);
       this.ex.write("  pushq %rax\n");
     }

src/main/java/de/hsrm/compiler/Klang/visitors/GetVars.java

@@ -4,6 +4,7 @@ import java.util.Set;
 
 import de.hsrm.compiler.Klang.nodes.*;
 import de.hsrm.compiler.Klang.nodes.expressions.*;
+import de.hsrm.compiler.Klang.nodes.loops.whileLoop;
 import de.hsrm.compiler.Klang.nodes.statements.*;
 
 class GetVars implements Visitor<Void> {
@@ -119,6 +120,13 @@ class GetVars implements Visitor<Void> {
     return null;
   }
 
+  @Override
+  public Void visit(whileLoop e) {
+    e.cond.welcome(this);
+    e.block.welcome(this);
+    return null;
+  }
+
   @Override
   public Void visit(PrintStatement e) {
     e.expression.welcome(this);

src/main/java/de/hsrm/compiler/Klang/visitors/PrettyPrintVisitor.java

@@ -3,298 +3,308 @@ package de.hsrm.compiler.Klang.visitors;
 import java.io.*;
 import de.hsrm.compiler.Klang.nodes.*;
 import de.hsrm.compiler.Klang.nodes.expressions.*;
+import de.hsrm.compiler.Klang.nodes.loops.whileLoop;
 import de.hsrm.compiler.Klang.nodes.statements.*;
 
 public class PrettyPrintVisitor implements Visitor<Void> {
 
-    public static class ExWriter {
-        Writer w;
-        String indent = "";
+  public static class ExWriter {
+    Writer w;
+    String indent = "";
 
-        void addIndent() {
-            indent = indent + "  ";
-        }
-
-        void subIndent() {
-            indent = indent.substring(2);
-        }
-
-        void nl() {
-            write("\n" + indent);
-        }
-
-        int lbl = 0;
-
-        int next() {
-            return lbl++;
-        }
-
-        public ExWriter(Writer w) {
-            this.w = w;
-        }
-
-        void lnwrite(Object o) {
-            nl();
-            write(o);
-        }
-
-        void write(Object o) {
-            try {
-                w.write(o + "");
-            } catch (IOException e) {
-                throw new RuntimeException(e);
-            }
-        }
+    void addIndent() {
+      indent = indent + "  ";
     }
 
-    public ExWriter ex;
-
-    public PrettyPrintVisitor(ExWriter ex) {
-        this.ex = ex;
+    void subIndent() {
+      indent = indent.substring(2);
     }
 
-    @Override
-    public Void visit(Program e) {
-        for (var funcDef : e.funcs) {
-            funcDef.welcome(this);
-            ex.nl();
-            ex.nl();
-        }
-        e.expression.welcome(this);
-        ex.write(";");
-        return null;
+    void nl() {
+      write("\n" + indent);
     }
 
-    @Override
-    public Void visit(IntegerExpression e) {
-        ex.write(e.value);
-        return null;
+    int lbl = 0;
+
+    int next() {
+      return lbl++;
     }
 
-    @Override
-    public Void visit(EqualityExpression e) {
-      ex.write("(");
-      e.lhs.welcome(this);
-      ex.write(" == ");
-      e.rhs.welcome(this);
-      ex.write(")");
-      return null;
+    public ExWriter(Writer w) {
+      this.w = w;
     }
 
-    @Override
-    public Void visit(NotEqualityExpression e) {
-      ex.write("(");
-      e.lhs.welcome(this);
-      ex.write(" != ");
-      e.rhs.welcome(this);
-      ex.write(")");
-      return null;
-    }
-  
-    @Override
-    public Void visit(GTExpression e) {
-      ex.write("(");
-      e.lhs.welcome(this);
-      ex.write(" > ");
-      e.rhs.welcome(this);
-      ex.write(")");
-      return null;
-    }
-  
-    @Override
-    public Void visit(GTEExpression e) {
-      ex.write("(");
-      e.lhs.welcome(this);
-      ex.write(" >= ");
-      e.rhs.welcome(this);
-      ex.write(")");
-      return null;
-    }
-  
-    @Override
-    public Void visit(LTExpression e) {
-      ex.write("(");
-      e.lhs.welcome(this);
-      ex.write(" < ");
-      e.rhs.welcome(this);
-      ex.write(")");
-      return null;
-    }
-  
-    @Override
-    public Void visit(LTEExpression e) {
-      ex.write("(");
-      e.lhs.welcome(this);
-      ex.write(" <= ");
-      e.rhs.welcome(this);
-      ex.write(")");
-      return null;
+    void lnwrite(Object o) {
+      nl();
+      write(o);
     }
 
-    @Override
-    public Void visit(AdditionExpression e) {
-        ex.write("(");
-        e.lhs.welcome(this);
-        ex.write(" + ");
-        e.rhs.welcome(this);
-        ex.write(")");
-        return null;
+    void write(Object o) {
+      try {
+        w.write(o + "");
+      } catch (IOException e) {
+        throw new RuntimeException(e);
+      }
+    }
+  }
+
+  public ExWriter ex;
+
+  public PrettyPrintVisitor(ExWriter ex) {
+    this.ex = ex;
+  }
+
+  @Override
+  public Void visit(Program e) {
+    for (var funcDef : e.funcs) {
+      funcDef.welcome(this);
+      ex.nl();
+      ex.nl();
+    }
+    e.expression.welcome(this);
+    ex.write(";");
+    return null;
+  }
+
+  @Override
+  public Void visit(IntegerExpression e) {
+    ex.write(e.value);
+    return null;
+  }
+
+  @Override
+  public Void visit(EqualityExpression e) {
+    ex.write("(");
+    e.lhs.welcome(this);
+    ex.write(" == ");
+    e.rhs.welcome(this);
+    ex.write(")");
+    return null;
+  }
+
+  @Override
+  public Void visit(NotEqualityExpression e) {
+    ex.write("(");
+    e.lhs.welcome(this);
+    ex.write(" != ");
+    e.rhs.welcome(this);
+    ex.write(")");
+    return null;
+  }
+
+  @Override
+  public Void visit(GTExpression e) {
+    ex.write("(");
+    e.lhs.welcome(this);
+    ex.write(" > ");
+    e.rhs.welcome(this);
+    ex.write(")");
+    return null;
+  }
+
+  @Override
+  public Void visit(GTEExpression e) {
+    ex.write("(");
+    e.lhs.welcome(this);
+    ex.write(" >= ");
+    e.rhs.welcome(this);
+    ex.write(")");
+    return null;
+  }
+
+  @Override
+  public Void visit(LTExpression e) {
+    ex.write("(");
+    e.lhs.welcome(this);
+    ex.write(" < ");
+    e.rhs.welcome(this);
+    ex.write(")");
+    return null;
+  }
+
+  @Override
+  public Void visit(LTEExpression e) {
+    ex.write("(");
+    e.lhs.welcome(this);
+    ex.write(" <= ");
+    e.rhs.welcome(this);
+    ex.write(")");
+    return null;
+  }
+
+  @Override
+  public Void visit(AdditionExpression e) {
+    ex.write("(");
+    e.lhs.welcome(this);
+    ex.write(" + ");
+    e.rhs.welcome(this);
+    ex.write(")");
+    return null;
+  }
+
+  @Override
+  public Void visit(SubstractionExpression e) {
+    ex.write("(");
+    e.lhs.welcome(this);
+    ex.write(" - ");
+    e.rhs.welcome(this);
+    ex.write(")");
+    return null;
+  }
+
+  @Override
+  public Void visit(MultiplicationExpression e) {
+    ex.write("(");
+    e.lhs.welcome(this);
+    ex.write(" * ");
+    e.rhs.welcome(this);
+    ex.write(")");
+    return null;
+  }
+
+  @Override
+  public Void visit(DivisionExpression e) {
+    ex.write("(");
+    e.lhs.welcome(this);
+    ex.write(" / ");
+    e.rhs.welcome(this);
+    ex.write(")");
+    return null;
+  }
+
+  @Override
+  public Void visit(ModuloExpression e) {
+    ex.write("(");
+    e.lhs.welcome(this);
+    ex.write(" % ");
+    e.rhs.welcome(this);
+    ex.write(")");
+    return null;
+  }
+
+  @Override
+  public Void visit(NegateExpression e) {
+    ex.write(" - ");
+    e.lhs.welcome(this);
+    return null;
+  }
+
+  @Override
+  public Void visit(IfStatement e) {
+    ex.write("if (");
+    e.cond.welcome(this);
+    ex.write(") ");
+    e.then.welcome(this);
+    if (e.alt != null) {
+      ex.write(" else ");
+      e.alt.welcome(this);
+    } else if (e.elif != null) {
+      ex.write(" else ");
+      e.elif.welcome(this);
+    }
+    return null;
+  }
+
+  @Override
+  public Void visit(whileLoop e) {
+    ex.write("while (");
+    e.cond.welcome(this);
+    ex.write(") ");
+    e.block.welcome(this);
+    return null;
+  }
+
+  @Override
+  public Void visit(PrintStatement e) {
+    ex.write("print ");
+    e.expression.welcome(this);
+    ex.write(";");
+    return null;
+  }
+
+  @Override
+  public Void visit(VariableDeclaration e) {
+    ex.write("let " + e.name);
+
+    if (e.expression != null) {
+      ex.write(" = ");
+      e.expression.welcome(this);
     }
 
-    @Override
-    public Void visit(SubstractionExpression e) {
-        ex.write("(");
-        e.lhs.welcome(this);
-        ex.write(" - ");
-        e.rhs.welcome(this);
-        ex.write(")");
-        return null;
+    ex.write(";");
+    return null;
+  }
+
+  @Override
+  public Void visit(VariableAssignment e) {
+    ex.write(e.name + " = ");
+    e.expression.welcome(this);
+    ex.write(";");
+    return null;
+  }
+
+  @Override
+  public Void visit(ReturnStatement e) {
+    ex.write("return ");
+    e.expression.welcome(this);
+    ex.write(";");
+    return null;
+  }
+
+  @Override
+  public Void visit(Block e) {
+    ex.write("{");
+    ex.addIndent();
+    for (Statement stmt : e.statements) {
+      ex.nl();
+      stmt.welcome(this);
     }
+    ex.subIndent();
+    ex.nl();
+    ex.write("}");
+    return null;
+  }
 
-    @Override
-    public Void visit(MultiplicationExpression e) {
-        ex.write("(");
-        e.lhs.welcome(this);
-        ex.write(" * ");
-        e.rhs.welcome(this);
-        ex.write(")");
-        return null;
+  @Override
+  public Void visit(FunctionDefinition e) {
+    ex.write("function ");
+    ex.write(e.name);
+    ex.write("(");
+    boolean first = true;
+    for (String param : e.parameters) {
+      if (!first) {
+        ex.write(", ");
+      } else {
+        first = false;
+      }
+      ex.write(param);
     }
+    ex.write(") ");
+    e.block.welcome(this);
+    return null;
+  }
 
-    @Override
-    public Void visit(DivisionExpression e) {
-        ex.write("(");
-        e.lhs.welcome(this);
-        ex.write(" / ");
-        e.rhs.welcome(this);
-        ex.write(")");
-        return null;
+  @Override
+  public Void visit(FunctionCall e) {
+    ex.write(e.name);
+    ex.write("(");
+    boolean first = true;
+    for (Expression arg : e.arguments) {
+      if (!first) {
+        ex.write(", ");
+      } else {
+        first = false;
+      }
+      arg.welcome(this);
     }
+    ex.write(")");
+    return null;
+  }
 
-    @Override
-    public Void visit(ModuloExpression e) {
-        ex.write("(");
-        e.lhs.welcome(this);
-        ex.write(" % ");
-        e.rhs.welcome(this);
-        ex.write(")");
-        return null;
-    }
-
-    @Override
-    public Void visit(NegateExpression e) {
-        ex.write(" - ");
-        e.lhs.welcome(this);
-        return null;
-    }
-
-    @Override
-    public Void visit(IfStatement e) {
-        ex.write("if (");
-        e.cond.welcome(this);
-        ex.write(") ");
-        e.then.welcome(this);
-        if (e.alt != null) {
-            ex.write(" else ");
-            e.alt.welcome(this);
-        } else if (e.elif != null) {
-            ex.write(" else ");
-            e.elif.welcome(this);
-        }
-        return null;
-    }
-
-    @Override
-    public Void visit(PrintStatement e) {
-        ex.write("print ");
-        e.expression.welcome(this);
-        ex.write(";");
-        return null;
-    }
-
-    @Override
-    public Void visit(VariableDeclaration e) {
-        ex.write("let " + e.name);
-
-        if (e.expression != null) {
-            ex.write(" = ");
-            e.expression.welcome(this);
-        }
-
-        ex.write(";");
-        return null;
-    }
-
-    @Override
-    public Void visit(VariableAssignment e) {
-        ex.write(e.name + " = ");
-        e.expression.welcome(this);
-        ex.write(";");
-        return null;
-    }
-
-    @Override
-    public Void visit(ReturnStatement e) {
-        ex.write("return ");
-        e.expression.welcome(this);
-        ex.write(";");
-        return null;
-    }
-
-    @Override
-    public Void visit(Block e) {
-        ex.write("{");
-        ex.addIndent();
-        for (Statement stmt : e.statements) {
-            ex.nl();
-            stmt.welcome(this);
-        }
-        ex.subIndent();
-        ex.nl();
-        ex.write("}");
-        return null;
-    }
-
-    @Override
-    public Void visit(FunctionDefinition e) {
-        ex.write("function ");
-        ex.write(e.name);
-        ex.write("(");
-        boolean first = true;
-        for (String param : e.parameters) {
-            if (!first) {
-                ex.write(", ");
-            } else {
-                first = false;
-            }
-            ex.write(param);
-        }
-        ex.write(") ");
-        e.block.welcome(this);
-        return null;
-    }
-
-    @Override
-    public Void visit(FunctionCall e) {
-        ex.write(e.name);
-        ex.write("(");
-        boolean first = true;
-        for (Expression arg : e.arguments) {
-            if (!first) {
-                ex.write(", ");
-            } else {
-                first = false;
-            }
-            arg.welcome(this);
-        }
-        ex.write(")");
-        return null;
-    }
-
-    @Override
-    public Void visit(Variable e) {
-        ex.write(e.name);
-        return null;
-    }
+  @Override
+  public Void visit(Variable e) {
+    ex.write(e.name);
+    return null;
+  }
 
 }

src/main/java/de/hsrm/compiler/Klang/visitors/Visitor.java

@@ -4,6 +4,7 @@ import de.hsrm.compiler.Klang.nodes.Block;
 import de.hsrm.compiler.Klang.nodes.FunctionDefinition;
 import de.hsrm.compiler.Klang.nodes.Program;
 import de.hsrm.compiler.Klang.nodes.expressions.*;
+import de.hsrm.compiler.Klang.nodes.loops.*;
 import de.hsrm.compiler.Klang.nodes.statements.*;
 
 public interface Visitor<R> {
@@ -22,6 +23,7 @@ public interface Visitor<R> {
     R visit(ModuloExpression e);
     R visit(NegateExpression e);
     R visit(IfStatement e);
+    R visit(whileLoop e);
     R visit(PrintStatement e);
     R visit(VariableDeclaration e);
     R visit(VariableAssignment e);

src/test/testCode.c

@@ -114,6 +114,9 @@ int main(){
   // Tests for comparison expressions
   failed += runComparisonTests();
 
+  // Tests for while loop
+  failed += runWhileTests();
+
   printf("\n=== Failed Tests: %d\n", failed);
 
   if (failed > 0) {

src/test/tests.h

@@ -4,4 +4,5 @@
 
 int runFunctionCallTests();
 int runRecursiveTests();
-int runComparisonTests();
+int runComparisonTests();
+int runWhileTests();

src/test/tests.k

@@ -133,4 +133,12 @@ function gte(x, y) {
   return (x >= y);
 }
 
+function myWhile(end) {
+  let cond = 0;
+  while ((cond < end)) {
+    cond = (cond + 1);
+  } 
+  return cond;
+}
+
 add(1, 1);

src/test/while/while.c

@@ -0,0 +1,27 @@
+#include <stdio.h>
+#include "while.h"
+
+void printWhileSuccess(char* name, int x,  int expected, int result) {
+  printf("SUCCESS:\t%s(%d)\tGOT: %d\tExpected: %d\n", name, x, result, expected);
+}
+
+void printWhileError(char* name, int x, int expected, int result) {
+  printf("ERROR:\t\t%s(%d)\tGOT: %d\tExpected: %d\n", name, x, result, expected);
+}
+
+int whileTest(char* name, int x, int expected, int result) {
+  if (expected == result) {
+    printWhileSuccess(name, x, expected, result);
+    return 0;
+  } else {
+    printWhileError(name, x, expected, result);
+    return 1;
+  }
+}
+
+int runWhileTests() {
+  printf("\nWhile Tests \n");
+  int failed = 0;
+  failed += whileTest("while", 5, 5, myWhile(5));
+  return failed;
+}

src/test/while/while.h

@@ -0,0 +1 @@
+int myWhile(int x);