1 files changed, 191 insertions, 0 deletions

diff --git a/task1/getoptwrapper.cpp b/task1/getoptwrapper.cpp
new file mode 100644
index 0000000..1efd603
--- /dev/null
+++ b/task1/getoptwrapper.cpp
@@ -0,0 +1,191 @@
+/**
+ * $Id: getoptwrapper.cpp 2 2009-10-31 02:48:23Z l0728348 $
+ *
+ * Copyright 2009
+ *
+ * @author Manuel Mausz (0728348)
+ * @brief  Wraps around getopt_long() using two classes
+ *         class CommandOption represents a valid commandline option
+ *         class CommandOptionParse calls getopt_long
+ *         and generates usage message
+ */
+
+#include <sstream>
+#include <iomanip>
+#include <algorithm>
+#include <stdexcept>
+#include <unistd.h>
+#include "getoptwrapper.h"
+
+using namespace std;
+
+CommandOptionParse::CommandOptionList cmdoptionlist;
+
+/*----------------------------------------------------------------------------*/
+
+const std::string CommandOption::printParameters()
+{
+  ostringstream oss;
+
+  if (!m_longopt.empty() && m_shortopt != 0)
+    oss << "-" << m_shortopt << " [ --" << m_longopt << " ]";
+  else if (!m_longopt.empty() && m_shortopt == 0)
+    oss << "--" << m_longopt;
+  else if (m_longopt.empty() && m_shortopt != 0)
+    oss << "-" << m_shortopt;
+
+  if (m_type == needArg)
+    oss << " arg";
+  else if (m_type == optArg)
+    oss << " [ arg ]";
+
+  return oss.str();
+}
+
+/*----------------------------------------------------------------------------*/
+
+void CommandOption::foundOption(const char *value)
+{
+  m_count++;
+  if (value != NULL)
+    m_value = value;
+}
+
+/*----------------------------------------------------------------------------*/
+
+bool CommandOptionParse::parse()
+{
+  CommandOptionList::iterator it;
+
+  /* build optstring */
+  m_optstring = "";
+  for (it = m_cmdlist.begin(); it != m_cmdlist.end(); ++it)
+  {
+    CommandOption *opt = *it;
+    if (opt->m_shortopt == 0)
+      continue;
+
+    m_optstring += opt->m_shortopt;
+    if (opt->m_type == CommandOption::needArg)
+      m_optstring += ':';
+    if (opt->m_type == CommandOption::optArg)
+      m_optstring += "::";
+  }
+
+  /* build longopts */
+  if (m_longopts != NULL)
+    delete[] m_longopts;
+  m_longopts = new option[m_cmdlist.size() + 1];
+  int i = 0;
+  for (it = m_cmdlist.begin(); it != m_cmdlist.end(); ++it)
+  {
+    CommandOption *opt = *it;
+    if (opt->m_longopt.empty())
+      continue;
+
+    m_longopts[i].name    = opt->m_longopt.c_str();
+    m_longopts[i].has_arg = opt->m_type;
+    m_longopts[i].flag    = 0;
+    m_longopts[i].val     = 0;
+    ++i;
+  }
+
+  /* append NULL-row */
+  m_longopts[i].name    = 0;
+  m_longopts[i].has_arg = 0;
+  m_longopts[i].flag    = 0;
+  m_longopts[i].val     = 0;
+
+  //opterr = 0; // no errors from getopt_long!
+  int opt;
+  int optindex = 0;
+  while ((opt = getopt_long(m_argc, m_argv, m_optstring.c_str(), m_longopts, &optindex)) != -1)
+  {
+    if (opt == '?')
+      return 0;
+
+    for (it = m_cmdlist.begin(); it != m_cmdlist.end(); ++it)
+    {
+      CommandOption *option = *it;
+      if (opt == 0)
+      {
+        if (option->m_longopt == m_longopts[optindex].name)
+          option->foundOption(optarg);
+      }
+      else if (opt == option->m_shortopt)
+        option->foundOption(optarg);
+    }
+  }
+
+  return 1;
+}
+
+/*----------------------------------------------------------------------------*/
+
+const std::string CommandOptionParse::usage()
+{
+  ostringstream oss;
+  string me(m_argv[0]);
+
+  /* build usage/synopsis */
+  oss << "Usage: ";
+  if (!m_synopsis.empty())
+  {
+    oss << me << " " << m_synopsis.at(0) << endl;
+    for (unsigned i = 1; i < m_synopsis.size(); ++i)
+      oss << "       " << me << " " << m_synopsis.at(i) << endl;
+  }
+  else
+    oss << me << " [OPTION]..." << endl;
+
+  /* find maximum width of options */
+  CommandOptionList::iterator it;
+  unsigned width = 20; // default
+  for (it = m_cmdlist.begin(); it != m_cmdlist.end(); ++it)
+  {
+    stringstream tmpss;
+    tmpss << (*it)->printParameters();
+    width = (max)(width, static_cast<unsigned>(tmpss.str().size()));
+  }
+  width += 2;
+
+  /* print allowed options + description */
+  oss << endl << m_description << ":" << endl;
+  for (it = m_cmdlist.begin(); it != m_cmdlist.end(); ++it)
+  {
+    oss << "  " << setw(width) << left << (*it)->printParameters()
+        << (*it)->m_description << endl;
+  }
+
+  return oss.str();
+}
+
+/*----------------------------------------------------------------------------*/
+
+CommandOption& CommandOptionParse::operator[](const std::string& longopt)
+{
+  CommandOptionList::iterator it;
+  for (it = m_cmdlist.begin(); it != m_cmdlist.end(); ++it)
+  {
+    CommandOption *opt = *it;
+    if (opt->m_longopt == longopt)
+      return *opt;
+  }
+  throw out_of_range("option not found");
+}
+
+/*----------------------------------------------------------------------------*/
+
+CommandOption& CommandOptionParse::operator[](const char shortopt)
+{
+  CommandOptionList::iterator it;
+  for (it = m_cmdlist.begin(); it != m_cmdlist.end(); ++it)
+  {
+    CommandOption *opt = *it;
+    if (opt->m_shortopt == shortopt)
+      return *opt;
+  }
+  throw out_of_range("option not found");
+}
+
+/* vim: set et sw=2 ts=2: */