1 files changed, 155 insertions, 0 deletions

diff --git a/ue4/mycpu/mycpu.cpp b/ue4/mycpu/mycpu.cpp
new file mode 100644
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+++ b/ue4/mycpu/mycpu.cpp
@@ -0,0 +1,155 @@
+/**
+ * @module mycpu
+ * @author Guenther Neuwirth (0626638), Manuel Mausz (0728348)
+ * @brief  mycpu executes a programfile (in simple assembler) by parsing the
+ *         programfile first. This creates a vector of instructions, which will
+ *         be executed in linear order (except jumps) afterwards. In order to
+ *         initialize the memory of the cpu before execution an optional
+ *         memoryfile can be passed as commandline option.
+ * @date   13.05.2009
+ * @par Exercise
+ *      4
+ */
+
+#include <boost/program_options.hpp>
+#include <iostream>
+#include <fstream>
+#include <stdexcept>
+#include <stdlib.h>
+#include "ccpu.h"
+#include "cmem.h"
+#include "cprogram.h"
+
+using namespace std;
+namespace po = boost::program_options;
+
+/**
+ * @func   main
+ * @brief  program entry point
+ * @param  argc  standard parameter of main
+ * @param  argv  standard parameter of main
+ * @return 0 on success, not 0 otherwise
+ * @globalvars none
+ * @exception  none
+ * @conditions none
+ *
+ * parse commandline options, create and initialize memory,
+ * create cprogram instance, which parses the programfile and
+ * execute CCPU::run()
+ * On error print error message to stderr.
+ * Unknown commandline options will print a usage message.
+ */
+int main(int argc, char* argv[])
+{
+  string me(argv[0]);
+
+  /* define commandline options */
+  po::options_description desc("Allowed options");
+  desc.add_options()
+    ("help,h",    "this help message")
+    ("compile,c", po::value<string>(), "input programfile")
+    ("memory,m",  po::value<string>(), "input memoryfile");
+
+  /* parse commandline options */
+  po::variables_map vm;
+  try
+  {
+    po::store(po::parse_command_line(argc, argv, desc), vm);
+    po::notify(vm);
+  }
+  catch(po::error& ex)
+  {
+    cerr << me << ": Error: " << ex.what() << endl;
+  }
+
+  /* print usage upon request or missing params */
+  if (vm.count("help") || !vm.count("compile"))
+  {
+    cout << "Usage: " << me << " -c <programfile> [-m <memoryfile>]" << endl;
+    cout << desc << endl;
+    return 0;
+  }
+
+  /* create memory and optionally initialize memory from file */
+  CMem memory;
+  if (vm.count("memory"))
+  {
+    string memoryfile(vm["memory"].as<string>());
+    ifstream file(memoryfile.c_str(), ios::in);
+    if (!file.is_open())
+    {
+      cerr << me << ": Unable to open memoryfile '" << memoryfile << "' for reading." << endl;
+      return 1;
+    }
+
+    try
+    {
+      memory.initialize(file);
+      file.close();
+    }
+    catch(runtime_error& ex)
+    {
+      file.close();
+      cerr << me << ": Error while reading from memoryfile:" << endl
+           << "  " << ex.what() << endl;
+      return 1;
+    }
+
+#if DEBUG
+    memory.dump(cerr);
+#endif
+  }
+
+  /* create program instance */
+  CProgram program;
+  string programfile(vm["compile"].as<string>());
+  ifstream file(programfile.c_str(), ios::in);
+  if (!file.is_open())
+  {
+    cerr << me << ": Unable to open programfile '" << programfile << "' for reading." << endl;
+    return 1;
+  }
+
+  try
+  {
+    program.compile(file);
+    file.close();
+  }
+  catch(runtime_error& ex)
+  {
+    file.close();
+    cerr << me << ": Error while compiling programfile:" << endl
+         << "  " << ex.what() << endl;
+    return 1;
+  }
+
+#if DEBUG
+  program.dump(cerr);
+#endif
+
+
+  /* create cpu and execute the program */
+  try
+  {
+    CCPU cpu(256);
+    cpu.setMemory(&memory);
+    cpu.setProgram(&program);
+    cpu.run();
+#if DEBUG
+    //cpu.dumpRegisters(cerr);
+#endif
+  }
+  catch(runtime_error& ex)
+  {
+    cerr << me << ": Error while executing program:" << endl
+         << "  " << ex.what() << endl;
+#if DEBUG
+    memory.dump(cerr);
+#endif
+    return 1;
+  }
+
+  return 0;
+}
+
+/* vim: set et sw=2 ts=2: */