ai_sign.cpp
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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 SignID AISign::GetMaxSignID()
00017 {
00018 return ::GetMaxSignIndex();
00019 }
00020
00021 bool AISign::IsValidSign(SignID sign_id)
00022 {
00023 return ::IsValidSignID(sign_id) && ::GetSign(sign_id)->owner == _current_company;
00024 }
00025
00026 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 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 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 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 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
00071 return 0;
00072 }