demo.cpp

/*
 * Using AnyOption to parse command line arguments and an options file
 *
 * Compile:
 *   $ g++ demo.cpp anyoption.cpp -o demo
 *
 * Test Command Line Options:
 *
 *  $ ./ demo
 *  usage:
 *
 *  -h  --help             Prints this help
 *  -s  --size <size>      Image Size
 *  -z  --zip              Compress Image
 *  -c                     Convert Image
 *  --name <image_name>    Image Name
 *
 *  $ ./demo -c --zip -s 42 --name foo.jpg
 *  size = 42
 *  name = foo.jpg
 *  c = flag set
 *  zip = flag set
 *
 * Test options from a resource file:
 *
 *  $ cat options.txt
 *  # sample options file
 *  c
 *  zip
 *  size  : 42
 *  name : foo.jpg
 *  title : FOO
 *
 *  $ ./demo -c
 *  size = 42
 *  name = foo.jpg
 *  title = FOO
 *  c = flag set
 *
 */

#include "anyoption.h"

void example(int argc, char *argv[]);

int main(int argc, char *argv[]) {
  example(argc, argv);
  return 0;
}

void example(int argc, char *argv[]) {

  /* 1. CREATE AN OBJECT */
  AnyOption *opt = new AnyOption();

  /* 2. SET PREFERENCES  */
  // opt->noPOSIX(); /* do not check for POSIX style character options */
  // opt->setVerbose(); /* print warnings about unknown options */
  // opt->autoUsagePrint(true); /* print usage for bad options */

  /* 3. SET THE USAGE/HELP   */
  opt->addUsage("usage: ");
  opt->addUsage("");
  opt->addUsage(" -h  --help  		Prints this help ");
  opt->addUsage(" -s  --size <size>      Image Size ");
  opt->addUsage(" -z  --zip  		Compress Image ");
  opt->addUsage(" -c   			Convert Image ");
  opt->addUsage(" --name <image_name> 	Image Name ");
  opt->addUsage("");

  /* 4. SET THE OPTION STRINGS/CHARACTERS */

  /* by default all  options  will be checked on the command line and from
   * option/resource file */
  opt->setFlag(
      "help",
      'h'); /* a flag (takes no argument), supporting long and short form */
  opt->setOption(
      "size",
      's'); /* an option (takes an argument), supporting long and short form */
  opt->setOption(
      "name"); /* an option (takes an argument), supporting only long form */
  opt->setFlag(
      'c'); /* a flag (takes no argument), supporting only short form */

  /* for options that will be checked only on the command and line not in
   * option/resource file */
  opt->setCommandFlag(
      "zip",
      'z'); /* a flag (takes no argument), supporting long and short form */

  /* for options that will be checked only from the option/resource file */
  opt->setFileOption(
      "title"); /* an option (takes an argument), supporting only long form */

  /* 5. PROCESS THE COMMANDLINE AND RESOURCE FILE */

  /* read options from a  option/resource file with ':' separated options or
   * flags, one per line */
  opt->processFile("./options.txt");

  /* go through the command line and get the options  */
  opt->processCommandArgs(argc, argv);

  if (!opt->hasOptions()) { /* print usage if no options */
    opt->printUsage();
    delete opt;
    return;
  }

  /* 6. GET THE VALUES */
  if (opt->getFlag("help") || opt->getFlag('h'))
    opt->printUsage();
  if (opt->getValue('s') != NULL || opt->getValue("size") != NULL)
    cout << "size = " << opt->getValue('s') << endl;
  if (opt->getValue("name") != NULL)
    cout << "name = " << opt->getValue("name") << endl;
  if (opt->getValue("title") != NULL)
    cout << "title = " << opt->getValue("title") << endl;
  if (opt->getFlag('c'))
    cout << "c = flag set " << endl;
  if (opt->getFlag('z') || opt->getFlag("zip"))
    cout << "zip = flag set " << endl;
  cout << endl;

  /* 7. GET THE ACTUAL ARGUMENTS AFTER THE OPTIONS */
  for (int i = 0; i < opt->getArgc(); i++) {
    cout << "arg = " << opt->getArgv(i) << endl;
  }

  /* 8. DONE */
  delete opt;
}