compiler/cpp/src/parse/t_enum.h

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

#ifndef T_ENUM_H
#define T_ENUM_H

#include "t_enum_value.h"
#include <vector>

/**
 * An enumerated type. A list of constant objects with a name for the type.
 *
 */
class t_enum : public t_type {
 public:
  t_enum(t_program* program) :
    t_type(program) {}

  void set_name(const std::string& name) {
    name_ = name;
  }

  void append(t_enum_value* constant) {
    constants_.push_back(constant);
  }

  const std::vector<t_enum_value*>& get_constants() {
    return constants_;
  }

  t_enum_value* get_constant_by_name(const std::string name) {
    const std::vector<t_enum_value*>& enum_values = get_constants();
    std::vector<t_enum_value*>::const_iterator c_iter;
    for (c_iter = enum_values.begin(); c_iter != enum_values.end(); ++c_iter) {
      if ((*c_iter)->get_name() == name) {
        return *c_iter;
      }
    }
    return NULL;
  }

  t_enum_value* get_constant_by_value(int64_t value) {
    const std::vector<t_enum_value*>& enum_values = get_constants();
    std::vector<t_enum_value*>::const_iterator c_iter;
    for (c_iter = enum_values.begin(); c_iter != enum_values.end(); ++c_iter) {
      if ((*c_iter)->get_value() == value) {
        return *c_iter;
      }
    }
    return NULL;
  }

  t_enum_value* get_min_value() {
    const std::vector<t_enum_value*>& enum_values = get_constants();
    std::vector<t_enum_value*>::const_iterator c_iter;
    t_enum_value* min_value;
    if (enum_values.size() == 0) {
      min_value = NULL;
    }
    else {
      int min_value_value;
      min_value = enum_values.front();
      min_value_value = (min_value->has_value() ? min_value->get_value() : 1);
      for (c_iter = enum_values.begin(); c_iter != enum_values.end(); ++c_iter) {
        if ((*c_iter)->has_value() &&
            ((*c_iter)->get_value() < min_value_value)) {
          min_value = (*c_iter);
          min_value_value = min_value->get_value();
        }
      }
    }
    return min_value;
  }

  t_enum_value* get_max_value() {
    const std::vector<t_enum_value*>& enum_values = get_constants();
    std::vector<t_enum_value*>::const_iterator c_iter;
    t_enum_value* max_value;
    if (enum_values.size() == 0) {
      max_value = NULL;
    }
    else {
      int max_value_value;
      max_value = enum_values.back();
      max_value_value =
        (max_value->has_value() ? max_value->get_value() : enum_values.size());
      for (c_iter = enum_values.begin(); c_iter != enum_values.end(); ++c_iter) {
        if ((*c_iter)->has_value() &&
            ((*c_iter)->get_value() > max_value_value)) {
          max_value = (*c_iter);
          max_value_value = max_value->get_value();
        }
      }
    }
    return max_value;
  }

  bool is_enum() const {
    return true;
  }

  virtual std::string get_fingerprint_material() const {
    return "enum";
  }

  void resolve_values() {
    const std::vector<t_enum_value*>& enum_values = get_constants();
    std::vector<t_enum_value*>::const_iterator c_iter;
    int lastValue = -1;
    for (c_iter = enum_values.begin(); c_iter != enum_values.end(); ++c_iter) {
      if (! (*c_iter)->has_value()) {
        (*c_iter)->set_value(++lastValue);
      } else {
        lastValue = (*c_iter)->get_value();
      }
    }
  }

 private:
  std::vector<t_enum_value*> constants_;
};

#endif