ledger/option.cc

#include "option.h"
#if 0
#ifdef USE_BOOST_PYTHON
#include "py_eval.h"
#endif
#endif

#if 0
#ifdef USE_BOOST_PYTHON
static ledger::option_t * find_option(const string& name);
#endif
#endif

namespace ledger {

namespace {
  xml::xpath_t::op_t * find_option(xml::xpath_t::scope_t * scope,
				   const string& name)
  {
    char buf[128];
    std::strcpy(buf, "option_");
    char * p = &buf[7];
    for (const char * q = name.c_str(); *q; q++) {
      if (*q == '-')
	*p++ = '_';
      else
	*p++ = *q;
    }
    *p = '\0';

    return scope->lookup(buf);
  }

  xml::xpath_t::op_t * find_option(xml::xpath_t::scope_t * scope,
				     const char letter)
  {
    char buf[9];
    std::strcpy(buf, "option_");
    buf[7] = letter;
    buf[8] = '\0';

    return scope->lookup(buf);
  }

  void process_option(xml::xpath_t::functor_t * opt, xml::xpath_t::scope_t * scope,
		      const char * arg)
  {
#if 0
    try {
#endif
      std::auto_ptr<xml::xpath_t::scope_t> args;
      if (arg) {
	args.reset(new xml::xpath_t::scope_t(scope, xml::xpath_t::scope_t::ARGUMENT));
	args->args.set_string(arg);
      }

      value_t temp;
      (*opt)(temp, args.get());
#if 0
    }
    catch (error * err) {
      err->context.push_back
	(new error_context
	 (string("While parsing option '--") + opt->long_opt +
	  "'" + (opt->short_opt != '\0' ?
		 (string(" (-") + opt->short_opt + "):") : ":")));
      throw err;
    }
#endif
  }
}

bool process_option(const string& name, xml::xpath_t::scope_t * scope,
		    const char * arg)
{
  std::auto_ptr<xml::xpath_t::op_t> opt(find_option(scope, name));
  if (opt.get()) {
    xml::xpath_t::functor_t * def = opt->functor_obj();
    if (def) {
      process_option(def, scope, arg);
      return true;
    }
  }
  return false;
}

void process_environment(const char ** envp, const string& tag,
			 xml::xpath_t::scope_t * scope)
{
  const char * tag_p   = tag.c_str();
  unsigned int tag_len = tag.length();

  for (const char ** p = envp; *p; p++)
    if (! tag_p || std::strncmp(*p, tag_p, tag_len) == 0) {
      char   buf[128];
      char * r = buf;
      const char * q;
      for (q = *p + tag_len;
	   *q && *q != '=' && r - buf < 128;
	   q++)
	if (*q == '_')
	  *r++ = '-';
	else
	  *r++ = std::tolower(*q);
      *r = '\0';

      if (*q == '=') {
#if 0
	try {
#endif
	  if (! process_option(buf, scope, q + 1))
#if 0
	    throw new option_error("unknown option")
#endif
	      ;
#if 0
	}
	catch (error * err) {
	  err->context.push_back
	    (new error_context
	     (string("While parsing environment variable option '") +
	      *p + "':"));
	  throw err;
	}
#endif
      }
    }
}

void process_arguments(int argc, char ** argv, const bool anywhere,
		       xml::xpath_t::scope_t * scope,
		       std::list<string>& args)
{
  for (char ** i = argv; *i; i++) {
    if ((*i)[0] != '-') {
      if (anywhere) {
	args.push_back(*i);
	continue;
      } else {
	for (; *i; i++)
	  args.push_back(*i);
	break;
      }
    }

    // --long-option or -s
   again:
    if ((*i)[1] == '-') {
      if ((*i)[2] == '\0')
	break;

      char * name  = *i + 2;
      char * value = NULL;
      if (char * p = std::strchr(name, '=')) {
	*p++ = '\0';
	value = p;
      }

      std::auto_ptr<xml::xpath_t::op_t> opt(find_option(scope, name));
      if (! opt.get())
	throw_(option_exception, "illegal option --" << name);

      xml::xpath_t::functor_t * def = opt->functor_obj();
      if (! def)
	throw_(option_exception, "illegal option --" << name);

      if (def->wants_args && value == NULL) {
	value = *++i;
	if (value == NULL)
	  throw_(option_exception, "missing option argument for --" << name);
      }
      process_option(def, scope, value);
    }
    else if ((*i)[1] == '\0') {
      throw_(option_exception, "illegal option -");
    }
    else {
      std::list<xml::xpath_t::op_t *> option_queue;

      int x = 1;
      for (char c = (*i)[x]; c != '\0'; x++, c = (*i)[x]) {
	xml::xpath_t::op_t * opt = find_option(scope, c);
	if (! opt)
	  throw_(option_exception, "illegal option -" << c);

	xml::xpath_t::functor_t * def = opt->functor_obj();
	if (! def)
	  throw_(option_exception, "illegal option -" << c);

	option_queue.push_back(opt);
      }

      for (std::list<xml::xpath_t::op_t *>::iterator
	     o = option_queue.begin();
	   o != option_queue.end();
	   o++) {
	char * value = NULL;

	xml::xpath_t::functor_t * def = (*o)->functor_obj();
	assert(def);

	if (def->wants_args) {
	  value = *++i;
	  if (value == NULL)
	    throw_(option_exception, "missing option argument for -" <<
#if 0
		   def->short_opt
#else
		   '?'
#endif
		   );
	}
	process_option(def, scope, value);

	delete *o;
      }
    }

   next:
    ;
  }
}

} // namespace ledger