/******************************************************************************
 *                       ____    _    _____                                   *
 *                      / ___|  / \  |  ___|    C++                           *
 *                     | |     / _ \ | |_       Actor                         *
 *                     | |___ / ___ \|  _|      Framework                     *
 *                      \____/_/   \_|_|                                      *
 *                                                                            *
 * Copyright (C) 2011 - 2015                                                  *
 * Dominik Charousset <dominik.charousset (at) haw-hamburg.de>                *
 *                                                                            *
 * Distributed under the terms and conditions of the BSD 3-Clause License or  *
 * (at your option) under the terms and conditions of the Boost Software      *
 * License 1.0. See accompanying files LICENSE and LICENSE_ALTERNATIVE.       *
 *                                                                            *
 * If you did not receive a copy of the license files, see                    *
 * http://opensource.org/licenses/BSD-3-Clause and                            *
 * http://www.boost.org/LICENSE_1_0.txt.                                      *
 ******************************************************************************/

#include "caf/deep_to_string.hpp"

namespace caf {

namespace {

bool is_escaped(const char* cstr) {
  if (*cstr != '"')
    return false;
  char last_char = *cstr++;
  for (auto c = *cstr; c != '\0'; ++cstr)
    if (c == '"' && last_char != '\\')
      return false;
  return last_char == '"';
}

} // namespace <anonymous>

std::string deep_to_string_t::operator()(const char* cstr) const {
  if (! cstr || *cstr == '\0')
    return "\"\"";
  if (is_escaped(cstr))
    return cstr;
  std::string result = "\"";
  char c;
  while ((c = *cstr++) != '\0') {
    switch (c) {
      case '\\':
        result += "\\\\";
        break;
      case '"':
        result += "\\\"";
        break;
      default:
        result += c;
    }
  }
  result += "\"";
  return result;
}

std::string deep_to_string_t::operator()(const atom_value& x) const {
  std::string result = "'";
  result += to_string(x);
  result += "'";
  return result;
}

} // namespace caf
