ai_config.cpp

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00001 /* $Id$ */
00002 
00003 /*
00004  * This file is part of OpenTTD.
00005  * 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.
00006  * 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.
00007  * 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/>.
00008  */
00009 
00012 #include "../stdafx.h"
00013 #include "../settings_type.h"
00014 #include "../core/random_func.hpp"
00015 #include "ai.hpp"
00016 #include "ai_config.hpp"
00017 
00018 void AIConfig::ChangeAI(const char *name, int version, bool force_exact_match, bool is_random_ai)
00019 {
00020   free((void *)this->name);
00021   this->name = (name == NULL) ? NULL : strdup(name);
00022   this->info = (name == NULL) ? NULL : AI::FindInfo(this->name, version, force_exact_match);
00023   this->version = (info == NULL) ? -1 : info->GetVersion();
00024   this->is_random_ai = is_random_ai;
00025   if (this->config_list != NULL) delete this->config_list;
00026   this->config_list = (info == NULL) ? NULL : new AIConfigItemList();
00027   if (this->config_list != NULL) this->config_list->push_back(_start_date_config);
00028 
00029   /* The special casing for start_date is here to ensure that the
00030    *  start_date setting won't change even if you chose another AI. */
00031   int start_date = this->GetSetting("start_date");
00032 
00033   for (SettingValueList::iterator it = this->settings.begin(); it != this->settings.end(); it++) {
00034     free((void*)(*it).first);
00035   }
00036   this->settings.clear();
00037 
00038   this->SetSetting("start_date", start_date);
00039 
00040   if (_game_mode == GM_NORMAL && this->info != NULL) {
00041     /* If we're in an existing game and the AI is changed, set all settings
00042      *  for the AI that have the random flag to a random value. */
00043     for (AIConfigItemList::const_iterator it = this->info->GetConfigList()->begin(); it != this->info->GetConfigList()->end(); it++) {
00044       if ((*it).flags & AICONFIG_RANDOM) {
00045         this->SetSetting((*it).name, InteractiveRandomRange((*it).max_value - (*it).min_value) + (*it).min_value);
00046       }
00047     }
00048     this->AddRandomDeviation();
00049   }
00050 }
00051 
00052 AIConfig::AIConfig(const AIConfig *config)
00053 {
00054   this->name = (config->name == NULL) ? NULL : strdup(config->name);
00055   this->info = config->info;
00056   this->version = config->version;
00057   this->config_list = NULL;
00058   this->is_random_ai = config->is_random_ai;
00059 
00060   for (SettingValueList::const_iterator it = config->settings.begin(); it != config->settings.end(); it++) {
00061     this->settings[strdup((*it).first)] = (*it).second;
00062   }
00063   this->AddRandomDeviation();
00064 }
00065 
00066 AIConfig::~AIConfig()
00067 {
00068   free((void *)this->name);
00069   this->ResetSettings();
00070   if (this->config_list != NULL) delete this->config_list;
00071 }
00072 
00073 AIInfo *AIConfig::GetInfo() const
00074 {
00075   return this->info;
00076 }
00077 
00078 bool AIConfig::ResetInfo(bool force_exact_match)
00079 {
00080   this->info = AI::FindInfo(this->name, force_exact_match ? this->version : -1, force_exact_match);
00081   return this->info != NULL;
00082 }
00083 
00084 const AIConfigItemList *AIConfig::GetConfigList()
00085 {
00086   if (this->info != NULL) return this->info->GetConfigList();
00087   if (this->config_list == NULL) {
00088     this->config_list = new AIConfigItemList();
00089     this->config_list->push_back(_start_date_config);
00090   }
00091   return this->config_list;
00092 }
00093 
00094 AIConfig *AIConfig::GetConfig(CompanyID company, AISettingSource source)
00095 {
00096   AIConfig **config;
00097   if (source == AISS_FORCE_NEWGAME || (source == AISS_DEFAULT && _game_mode == GM_MENU)) {
00098     config = &_settings_newgame.ai_config[company];
00099   } else {
00100     config = &_settings_game.ai_config[company];
00101   }
00102   if (*config == NULL) *config = new AIConfig();
00103   return *config;
00104 }
00105 
00106 int AIConfig::GetSetting(const char *name) const
00107 {
00108   SettingValueList::const_iterator it = this->settings.find(name);
00109   /* Return the default value if the setting is not set, or if we are in a not-custom difficult level */
00110   if (it == this->settings.end() || GetGameSettings().difficulty.diff_level != 3) {
00111     if (this->info == NULL) {
00112       assert(strcmp("start_date", name) == 0);
00113       switch (GetGameSettings().difficulty.diff_level) {
00114         case 0: return AI::START_NEXT_EASY;
00115         case 1: return AI::START_NEXT_MEDIUM;
00116         case 2: return AI::START_NEXT_HARD;
00117         case 3: return AI::START_NEXT_MEDIUM;
00118         default: NOT_REACHED();
00119       }
00120     }
00121     return this->info->GetSettingDefaultValue(name);
00122   }
00123   return (*it).second;
00124 }
00125 
00126 void AIConfig::SetSetting(const char *name, int value)
00127 {
00128   /* You can only set ai specific settings if an AI is selected. */
00129   if (this->info == NULL && strcmp("start_date", name) != 0) return;
00130 
00131   if (this->info == NULL && strcmp("start_date", name) == 0) {
00132     value = Clamp(value, AI::START_NEXT_MIN, AI::START_NEXT_MAX);
00133   } else {
00134     const AIConfigItem *config_item = this->info->GetConfigItem(name);
00135     if (config_item == NULL) return;
00136 
00137     value = Clamp(value, config_item->min_value, config_item->max_value);
00138   }
00139 
00140   SettingValueList::iterator it = this->settings.find(name);
00141   if (it != this->settings.end()) {
00142     (*it).second = value;
00143   } else {
00144     this->settings[strdup(name)] = value;
00145   }
00146 }
00147 
00148 void AIConfig::ResetSettings()
00149 {
00150   for (SettingValueList::iterator it = this->settings.begin(); it != this->settings.end(); it++) {
00151     free((void*)(*it).first);
00152   }
00153   this->settings.clear();
00154 }
00155 
00156 void AIConfig::AddRandomDeviation()
00157 {
00158   for (AIConfigItemList::const_iterator it = this->GetConfigList()->begin(); it != this->GetConfigList()->end(); it++) {
00159     if ((*it).random_deviation != 0) {
00160       this->SetSetting((*it).name, InteractiveRandomRange((*it).random_deviation * 2) - (*it).random_deviation + this->GetSetting((*it).name));
00161     }
00162   }
00163 }
00164 
00165 bool AIConfig::HasAI() const
00166 {
00167   return this->info != NULL;
00168 }
00169 
00170 bool AIConfig::IsRandomAI() const
00171 {
00172   return this->is_random_ai;
00173 }
00174 
00175 const char *AIConfig::GetName() const
00176 {
00177   return this->name;
00178 }
00179 
00180 int AIConfig::GetVersion() const
00181 {
00182   return this->version;
00183 }
00184 
00185 void AIConfig::StringToSettings(const char *value)
00186 {
00187   char *value_copy = strdup(value);
00188   char *s = value_copy;
00189 
00190   while (s != NULL) {
00191     /* Analyze the string ('name=value,name=value\0') */
00192     char *item_name = s;
00193     s = strchr(s, '=');
00194     if (s == NULL) break;
00195     if (*s == '\0') break;
00196     *s = '\0';
00197     s++;
00198 
00199     char *item_value = s;
00200     s = strchr(s, ',');
00201     if (s != NULL) {
00202       *s = '\0';
00203       s++;
00204     }
00205 
00206     this->SetSetting(item_name, atoi(item_value));
00207   }
00208   free(value_copy);
00209 }
00210 
00211 void AIConfig::SettingsToString(char *string, size_t size) const
00212 {
00213   string[0] = '\0';
00214   for (SettingValueList::const_iterator it = this->settings.begin(); it != this->settings.end(); it++) {
00215     char no[10];
00216     snprintf(no, sizeof(no), "%d", (*it).second);
00217 
00218     /* Check if the string would fit in the destination */
00219     size_t needed_size = strlen((*it).first) + 1 + strlen(no) + 1;
00220     /* If it doesn't fit, skip the next settings */
00221     if (size <= needed_size) break;
00222     size -= needed_size;
00223 
00224     strcat(string, (*it).first);
00225     strcat(string, "=");
00226     strcat(string, no);
00227     strcat(string, ",");
00228   }
00229   /* Remove the last ',', but only if at least one setting was saved. */
00230   size_t len = strlen(string);
00231   if (len > 0) string[len - 1] = '\0';
00232 }

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