diff options
Diffstat (limited to 'economy.c')
| -rw-r--r-- | economy.c | 70 |
1 files changed, 43 insertions, 27 deletions
@@ -1527,41 +1527,40 @@ static void DoAcquireCompany(Player *p) extern int GetAmountOwnedBy(Player *p, byte owner); +/** Acquire shares in an opposing company. + * @param x,y unused + * @param p1 player to buy the shares from + * @param p2 unused + */ int32 CmdBuyShareInCompany(int x, int y, uint32 flags, uint32 p1, uint32 p2) { Player *p; int64 cost; - byte *b; - int i; + + /* Check if buying shares is allowed (protection against modified clients */ + if (p1 >= MAX_PLAYERS || !_patches.allow_shares) return CMD_ERROR; SET_EXPENSES_TYPE(EXPENSES_OTHER); p = DEREF_PLAYER(p1); - - if (_cur_year - p->inaugurated_year < 6) { - _error_message = STR_7080_PROTECTED; - return CMD_ERROR; - } - - /* Check if buying shares is allowed (protection against modified clients */ - if (!_patches.allow_shares) - return CMD_ERROR; + /* Protect new companies from hostile takeovers */ + if (_cur_year - p->inaugurated_year < 6) return_cmd_error(STR_7080_PROTECTED); /* Those lines are here for network-protection (clients can be slow) */ - if (GetAmountOwnedBy(p, OWNER_SPECTATOR) == 0) - return 0; + if (GetAmountOwnedBy(p, OWNER_SPECTATOR) == 0) return 0; - /* We can not buy out a real player in networking */ - if (GetAmountOwnedBy(p, OWNER_SPECTATOR) == 1 && !p->is_ai) - return 0; + /* We can not buy out a real player (temporarily). TODO: well, enable it obviously */ + if (GetAmountOwnedBy(p, OWNER_SPECTATOR) == 1 && !p->is_ai) return 0; cost = CalculateCompanyValue(p) >> 2; if (flags & DC_EXEC) { - b = p->share_owners; + int i; + byte *b = p->share_owners; + while (*b != 0xFF) b++; /* share owners is guaranteed to contain at least one 0xFF */ *b = _current_player; - for(i=0;p->share_owners[i] == _current_player;) { + for (i = 0; p->share_owners[i] == _current_player;) { if (++i == 4) { p->bankrupt_value = 0; DoAcquireCompany(p); @@ -1573,29 +1572,31 @@ int32 CmdBuyShareInCompany(int x, int y, uint32 flags, uint32 p1, uint32 p2) return cost; } +/** Sell shares in an opposing company. + * @param x,y unused + * @param p1 player to sell the shares from + * @param p2 unused + */ int32 CmdSellShareInCompany(int x, int y, uint32 flags, uint32 p1, uint32 p2) { Player *p; int64 cost; - byte *b; + + /* Check if buying shares is allowed (protection against modified clients */ + if (p1 >= MAX_PLAYERS || !_patches.allow_shares) return CMD_ERROR; SET_EXPENSES_TYPE(EXPENSES_OTHER); p = DEREF_PLAYER(p1); - /* Check if selling shares is allowed (protection against modified clients */ - if (!_patches.allow_shares) - return CMD_ERROR; - /* Those lines are here for network-protection (clients can be slow) */ - if (GetAmountOwnedBy(p, _current_player) == 0) - return 0; + if (GetAmountOwnedBy(p, _current_player) == 0) return 0; /* adjust it a little to make it less profitable to sell and buy */ cost = CalculateCompanyValue(p) >> 2; cost = -(cost - (cost >> 7)); if (flags & DC_EXEC) { - b = p->share_owners; + byte *b = p->share_owners; while (*b != _current_player) b++; /* share owners is guaranteed to contain player */ *b = 0xFF; InvalidateWindow(WC_COMPANY, (int)p1); @@ -1603,12 +1604,27 @@ int32 CmdSellShareInCompany(int x, int y, uint32 flags, uint32 p1, uint32 p2) return cost; } +/** Buy up another company. + * When a competing company is gone bankrupt you get the chance to purchase + * that company. + * @todo currently this only works for AI players + * @param x,y unused + * @param p1 player/company to buy up + * @param p2 unused + */ int32 CmdBuyCompany(int x, int y, uint32 flags, uint32 p1, uint32 p2) { Player *p; + + /* Disable takeovers in multiplayer games */ + if (p1 >= MAX_PLAYERS || _networking) return CMD_ERROR; + SET_EXPENSES_TYPE(EXPENSES_OTHER); p = DEREF_PLAYER(p1); - if (flags & 1) { + + if (!p->is_ai) return CMD_ERROR; + + if (flags & DC_EXEC) { DoAcquireCompany(p); } return p->bankrupt_value; |