1 files changed, 33 insertions, 0 deletions
diff --git a/ExternalInterpreter.java b/ExternalInterpreter.java
new file mode 100644
index 0000000..04776a8
--- /dev/null
+++ b/ExternalInterpreter.java
@@ -0,0 +1,33 @@
+// because writing java violates human rights
+
+import java.lang.Runtime;
+
+class ExternalInterpreter extends AbstractInterpreter {
+    ExternalInterpreter(String cmdName) {
+	this.cmdName = cmdName;
+    }
+
+    public String eval(String code, String param) {
+	java.lang.StringBuilder res = new java.lang.StringBuilder();
+	try {
+	    // exec program capturing its standart output
+	    String[] cmd = {"timeout", "-s", "9", "1", cmdName, code, param};
+	    Process p = java.lang.Runtime.getRuntime().exec(cmd);
+	    java.io.InputStream s = p.getInputStream();
+	    int c;
+	    // read stdout
+	    while (((c = s.read()) >= 0) && (res.length() < code.length())) {
+		switch (c) {
+		case '1': res.append("1"); break;
+		default:  res.append("0");
+		}
+	    }
+	    // pad string
+	    while (res.length() < code.length())
+		res.append("0");
+	} catch (java.io.IOException e) {}
+	return res.toString();
+    }    
+
+    String cmdName;
+}