yapf_type.hpp

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/*
 * This file is part of OpenTTD.
 * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
 * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
 */
 
#ifndef YAPF_TYPE_HPP
#define YAPF_TYPE_HPP
 
#include <iomanip>
#include <sstream>
 
/* Enum used in PfCalcCost() to see why was the segment closed. */
enum EndSegmentReason {
  /* The following reasons can be saved into cached segment */
  ESR_DEAD_END = 0,      
  ESR_RAIL_TYPE,         
  ESR_INFINITE_LOOP,     
  ESR_SEGMENT_TOO_LONG,  
  ESR_CHOICE_FOLLOWS,    
  ESR_DEPOT,             
  ESR_WAYPOINT,          
  ESR_STATION,           
  ESR_SAFE_TILE,         
 
  /* The following reasons are used only internally by PfCalcCost().
   *  They should not be found in the cached segment. */
  ESR_PATH_TOO_LONG,     
  ESR_FIRST_TWO_WAY_RED, 
  ESR_LOOK_AHEAD_END,    
  ESR_TARGET_REACHED,    
 
  /* Special values */
  ESR_NONE = 0xFF,          
};
 
enum EndSegmentReasonBits {
  ESRB_NONE = 0,
 
  ESRB_DEAD_END          = 1 << ESR_DEAD_END,
  ESRB_RAIL_TYPE         = 1 << ESR_RAIL_TYPE,
  ESRB_INFINITE_LOOP     = 1 << ESR_INFINITE_LOOP,
  ESRB_SEGMENT_TOO_LONG  = 1 << ESR_SEGMENT_TOO_LONG,
  ESRB_CHOICE_FOLLOWS    = 1 << ESR_CHOICE_FOLLOWS,
  ESRB_DEPOT             = 1 << ESR_DEPOT,
  ESRB_WAYPOINT          = 1 << ESR_WAYPOINT,
  ESRB_STATION           = 1 << ESR_STATION,
  ESRB_SAFE_TILE         = 1 << ESR_SAFE_TILE,
 
  ESRB_PATH_TOO_LONG     = 1 << ESR_PATH_TOO_LONG,
  ESRB_FIRST_TWO_WAY_RED = 1 << ESR_FIRST_TWO_WAY_RED,
  ESRB_LOOK_AHEAD_END    = 1 << ESR_LOOK_AHEAD_END,
  ESRB_TARGET_REACHED    = 1 << ESR_TARGET_REACHED,
 
  /* Additional (composite) values. */
 
  /* What reasons mean that the target can be found and needs to be detected. */
  ESRB_POSSIBLE_TARGET = ESRB_DEPOT | ESRB_WAYPOINT | ESRB_STATION | ESRB_SAFE_TILE,
 
  /* What reasons can be stored back into cached segment. */
  ESRB_CACHED_MASK = ESRB_DEAD_END | ESRB_RAIL_TYPE | ESRB_INFINITE_LOOP | ESRB_SEGMENT_TOO_LONG | ESRB_CHOICE_FOLLOWS | ESRB_DEPOT | ESRB_WAYPOINT | ESRB_STATION | ESRB_SAFE_TILE,
 
  /* Reasons to abort pathfinding in this direction. */
  ESRB_ABORT_PF_MASK = ESRB_DEAD_END | ESRB_PATH_TOO_LONG | ESRB_INFINITE_LOOP | ESRB_FIRST_TWO_WAY_RED,
};
 
DECLARE_ENUM_AS_BIT_SET(EndSegmentReasonBits)
 
inline std::string ValueStr(EndSegmentReasonBits bits)
{
  static const char * const end_segment_reason_names[] = {
    "DEAD_END", "RAIL_TYPE", "INFINITE_LOOP", "SEGMENT_TOO_LONG", "CHOICE_FOLLOWS",
    "DEPOT", "WAYPOINT", "STATION", "SAFE_TILE",
    "PATH_TOO_LONG", "FIRST_TWO_WAY_RED", "LOOK_AHEAD_END", "TARGET_REACHED"
  };
 
  std::stringstream ss;
  ss << "0x" << std::setfill('0') << std::setw(4) << std::hex << bits; // 0x%04X
  ss << " (" << ComposeNameT(bits, end_segment_reason_names, "UNK", ESRB_NONE, "NONE") << ")";
  return ss.str();
}
 
#endif /* YAPF_TYPE_HPP */