# ai_sign.cpp

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    00001 /* $Id: ai_sign.cpp 15299 2009-01-31 20:16:06Z smatz $ */
    00002
    00005 #include "ai_sign.hpp"
    00006 #include "table/strings.h"
    00007 #include "../ai_instance.hpp"
    00008 #include "../../command_func.h"
    00009 #include "../../core/alloc_func.hpp"
    00010 #include "../../signs_base.h"
    00011 #include "../../string_func.h"
    00012 #include "../../strings_func.h"
    00013 #include "../../tile_map.h"
    00014 #include "../../company_func.h"
    00015
    00016 /* static */ SignID AISign::GetMaxSignID()
    00017 {
    00018   return ::GetMaxSignIndex();
    00019 }
    00020
    00021 /* static */ bool AISign::IsValidSign(SignID sign_id)
    00022 {
    00023   return ::IsValidSignID(sign_id) && ::GetSign(sign_id)->owner == _current_company;
    00024 }
    00025
    00026 /* static */ bool AISign::SetName(SignID sign_id, const char *name)
    00027 {
    00028   EnforcePrecondition(false, IsValidSign(sign_id));
    00029   EnforcePrecondition(false, !::StrEmpty(name));
    00030   EnforcePreconditionCustomError(false, ::strlen(name) < MAX_LENGTH_SIGN_NAME_BYTES, AIError::ERR_PRECONDITION_STRING_TOO_LONG);
    00031
    00032   return AIObject::DoCommand(0, sign_id, 0, CMD_RENAME_SIGN, name);
    00033 }
    00034
    00035 /* static */ char *AISign::GetName(SignID sign_id)
    00036 {
    00037   if (!IsValidSign(sign_id)) return NULL;
    00038
    00039   static const int len = 64;
    00040   char *sign_name = MallocT<char>(len);
    00041
    00042   ::SetDParam(0, sign_id);
    00043   ::GetString(sign_name, STR_SIGN_NAME, &sign_name[len - 1]);
    00044
    00045   return sign_name;
    00046 }
    00047
    00048 /* static */ TileIndex AISign::GetLocation(SignID sign_id)
    00049 {
    00050   if (!IsValidSign(sign_id)) return INVALID_TILE;
    00051
    00052   const Sign *sign = ::GetSign(sign_id);
    00053   return ::TileVirtXY(sign->x, sign->y);
    00054 }
    00055
    00056 /* static */ bool AISign::RemoveSign(SignID sign_id)
    00057 {
    00058   EnforcePrecondition(false, IsValidSign(sign_id));
    00059   return AIObject::DoCommand(0, sign_id, 0, CMD_RENAME_SIGN, "");
    00060 }
    00061
    00062 /* static */ SignID AISign::BuildSign(TileIndex location, const char *text)
    00063 {
    00064   EnforcePrecondition(INVALID_SIGN, ::IsValidTile(location));
    00065   EnforcePrecondition(INVALID_SIGN, !::StrEmpty(text));
    00066   EnforcePreconditionCustomError(false, ::strlen(text) < MAX_LENGTH_SIGN_NAME_BYTES, AIError::ERR_PRECONDITION_STRING_TOO_LONG);
    00067
    00068   if (!AIObject::DoCommand(location, 0, 0, CMD_PLACE_SIGN, text, &AIInstance::DoCommandReturnSignID)) return INVALID_SIGN;
    00069
    00070   /* In case of test-mode, we return SignID 0 */
    00071   return 0;
    00072 }