OpenTTD
misc_cmd.cpp
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1 /* $Id: misc_cmd.cpp 26482 2014-04-23 20:13:33Z rubidium $ */
2 
3 /*
4  * This file is part of OpenTTD.
5  * 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.
6  * 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.
7  * 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/>.
8  */
9 
12 #include "stdafx.h"
13 #include "command_func.h"
14 #include "economy_func.h"
15 #include "cmd_helper.h"
16 #include "window_func.h"
17 #include "textbuf_gui.h"
18 #include "network/network.h"
19 #include "network/network_func.h"
20 #include "strings_func.h"
21 #include "company_func.h"
22 #include "company_gui.h"
23 #include "company_base.h"
24 #include "core/backup_type.hpp"
25 
26 #include "table/strings.h"
27 
28 #include "safeguards.h"
29 
41 CommandCost CmdIncreaseLoan(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
42 {
44 
45  if (c->current_loan >= _economy.max_loan) {
46  SetDParam(0, _economy.max_loan);
47  return_cmd_error(STR_ERROR_MAXIMUM_PERMITTED_LOAN);
48  }
49 
50  Money loan;
51  switch (p2) {
52  default: return CMD_ERROR; // Invalid method
53  case 0: // Take some extra loan
54  loan = LOAN_INTERVAL;
55  break;
56  case 1: // Take a loan as big as possible
57  loan = _economy.max_loan - c->current_loan;
58  break;
59  case 2: // Take the given amount of loan
60  if ((int32)p1 < LOAN_INTERVAL || c->current_loan + (int32)p1 > _economy.max_loan || p1 % LOAN_INTERVAL != 0) return CMD_ERROR;
61  loan = p1;
62  break;
63  }
64 
65  /* Overflow protection */
66  if (c->money + c->current_loan + loan < c->money) return CMD_ERROR;
67 
68  if (flags & DC_EXEC) {
69  c->money += loan;
70  c->current_loan += loan;
72  }
73 
75 }
76 
88 CommandCost CmdDecreaseLoan(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
89 {
91 
92  if (c->current_loan == 0) return_cmd_error(STR_ERROR_LOAN_ALREADY_REPAYED);
93 
94  Money loan;
95  switch (p2) {
96  default: return CMD_ERROR; // Invalid method
97  case 0: // Pay back one step
98  loan = min(c->current_loan, (Money)LOAN_INTERVAL);
99  break;
100  case 1: // Pay back as much as possible
101  loan = max(min(c->current_loan, c->money), (Money)LOAN_INTERVAL);
102  loan -= loan % LOAN_INTERVAL;
103  break;
104  case 2: // Repay the given amount of loan
105  if (p1 % LOAN_INTERVAL != 0 || (int32)p1 < LOAN_INTERVAL || p1 > c->current_loan) return CMD_ERROR; // Invalid amount to loan
106  loan = p1;
107  break;
108  }
109 
110  if (c->money < loan) {
111  SetDParam(0, loan);
112  return_cmd_error(STR_ERROR_CURRENCY_REQUIRED);
113  }
114 
115  if (flags & DC_EXEC) {
116  c->money -= loan;
117  c->current_loan -= loan;
119  }
120  return CommandCost();
121 }
122 
129 static void AskUnsafeUnpauseCallback(Window *w, bool confirmed)
130 {
131  if (confirmed) {
133  }
134 }
135 
148 CommandCost CmdPause(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
149 {
150  switch (p1) {
151  case PM_PAUSED_SAVELOAD:
152  case PM_PAUSED_ERROR:
153  case PM_PAUSED_NORMAL:
155  break;
156 
157 #ifdef ENABLE_NETWORK
158  case PM_PAUSED_JOIN:
160  if (!_networking) return CMD_ERROR;
161  break;
162 #endif /* ENABLE_NETWORK */
163 
164  default: return CMD_ERROR;
165  }
166  if (flags & DC_EXEC) {
168  ShowQuery(
169  STR_NEWGRF_UNPAUSE_WARNING_TITLE,
170  STR_NEWGRF_UNPAUSE_WARNING,
171  NULL,
173  );
174  } else {
175 #ifdef ENABLE_NETWORK
176  PauseMode prev_mode = _pause_mode;
177 #endif /* ENABLE_NETWORK */
178 
179  if (p2 == 0) {
180  _pause_mode = _pause_mode & ~p1;
181  } else {
182  _pause_mode = _pause_mode | p1;
183  }
184 
185 #ifdef ENABLE_NETWORK
186  NetworkHandlePauseChange(prev_mode, (PauseMode)p1);
187 #endif /* ENABLE_NETWORK */
188  }
189 
192  }
193  return CommandCost();
194 }
195 
205 CommandCost CmdMoneyCheat(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
206 {
207  return CommandCost(EXPENSES_OTHER, -(int32)p1);
208 }
209 
220 CommandCost CmdChangeBankBalance(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
221 {
222  int32 delta = (int32)p1;
223  CompanyID company = (CompanyID) GB(p2, 0, 8);
224  ExpensesType expenses_type = Extract<ExpensesType, 8, 8>(p2);
225 
226  if (!Company::IsValidID(company)) return CMD_ERROR;
227  if (expenses_type >= EXPENSES_END) return CMD_ERROR;
228  if (_current_company != OWNER_DEITY) return CMD_ERROR;
229 
230  if (flags & DC_EXEC) {
231  /* Change company bank balance of company. */
232  Backup<CompanyByte> cur_company(_current_company, company, FILE_LINE);
233  SubtractMoneyFromCompany(CommandCost(expenses_type, -delta));
234  cur_company.Restore();
235  }
236 
237  /* This command doesn't cost anyting for deity. */
238  CommandCost zero_cost(expenses_type, 0);
239  return zero_cost;
240 }
241 
254 CommandCost CmdGiveMoney(TileIndex tile, DoCommandFlag flags, uint32 p1, uint32 p2, const char *text)
255 {
257 
259  CommandCost amount(EXPENSES_OTHER, min((Money)p1, (Money)20000000LL));
260  CompanyID dest_company = (CompanyID)p2;
261 
262  /* You can only transfer funds that is in excess of your loan */
263  if (c->money - c->current_loan < amount.GetCost() || amount.GetCost() < 0) return CMD_ERROR;
264  if (!_networking || !Company::IsValidID(dest_company)) return CMD_ERROR;
265 
266  if (flags & DC_EXEC) {
267  /* Add money to company */
268  Backup<CompanyByte> cur_company(_current_company, dest_company, FILE_LINE);
270  cur_company.Restore();
271  }
272 
273  /* Subtract money from local-company */
274  return amount;
275 }