OpenTTD: src/ai/ai_info.cpp Source File

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ai_info.cpp
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1 /* $Id: ai_info.cpp 27993 2018-03-14 19:36:41Z frosch $ */
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
14 #include "../script/squirrel_class.hpp"
15 #include "ai_info.hpp"
16 #include "ai_scanner.hpp"
17 #include "../debug.h"
18 #include "../string_func.h"
19 #include "../rev.h"
20
21 #include "../safeguards.h"
22
27 static bool CheckAPIVersion(const char *api_version)
28 {
29 return strcmp(api_version, "0.7") == 0 || strcmp(api_version, "1.0") == 0 || strcmp(api_version, "1.1") == 0 ||
30 strcmp(api_version, "1.2") == 0 || strcmp(api_version, "1.3") == 0 || strcmp(api_version, "1.4") == 0 ||
31 strcmp(api_version, "1.5") == 0 || strcmp(api_version, "1.6") == 0 || strcmp(api_version, "1.7") == 0 ||
32 strcmp(api_version, "1.8") == 0 || strcmp(api_version, "1.9") == 0;
33 }
34
35 #if defined(WIN32)
36 #undef GetClassName
37 #endif /* WIN32 */
38 template <> const char *GetClassName<AIInfo, ST_AI>() { return "AIInfo"; }
39
40 /* static */ void AIInfo::RegisterAPI(Squirrel *engine)
41 {
42 /* Create the AIInfo class, and add the RegisterAI function */
43 DefSQClass<AIInfo, ST_AI> SQAIInfo("AIInfo");
44 SQAIInfo.PreRegister(engine);
45 SQAIInfo.AddConstructor<void (AIInfo::*)(), 1>(engine, "x");
46 SQAIInfo.DefSQAdvancedMethod(engine, &AIInfo::AddSetting, "AddSetting");
47 SQAIInfo.DefSQAdvancedMethod(engine, &AIInfo::AddLabels, "AddLabels");
48 SQAIInfo.DefSQConst(engine, SCRIPTCONFIG_NONE, "CONFIG_NONE");
49 SQAIInfo.DefSQConst(engine, SCRIPTCONFIG_RANDOM, "CONFIG_RANDOM");
50 SQAIInfo.DefSQConst(engine, SCRIPTCONFIG_BOOLEAN, "CONFIG_BOOLEAN");
51 SQAIInfo.DefSQConst(engine, SCRIPTCONFIG_INGAME, "CONFIG_INGAME");
52 SQAIInfo.DefSQConst(engine, SCRIPTCONFIG_DEVELOPER, "CONFIG_DEVELOPER");
53
54 /* Pre 1.2 had an AI prefix */
55 SQAIInfo.DefSQConst(engine, SCRIPTCONFIG_NONE, "AICONFIG_NONE");
56 SQAIInfo.DefSQConst(engine, SCRIPTCONFIG_RANDOM, "AICONFIG_RANDOM");
57 SQAIInfo.DefSQConst(engine, SCRIPTCONFIG_BOOLEAN, "AICONFIG_BOOLEAN");
58 SQAIInfo.DefSQConst(engine, SCRIPTCONFIG_INGAME, "AICONFIG_INGAME");
59
60 SQAIInfo.PostRegister(engine);
61 engine->AddMethod("RegisterAI", &AIInfo::Constructor, 2, "tx");
62 engine->AddMethod("RegisterDummyAI", &AIInfo::DummyConstructor, 2, "tx");
63 }
64
65 /* static */ SQInteger AIInfo::Constructor(HSQUIRRELVM vm)
66 {
67 /* Get the AIInfo */
68 SQUserPointer instance = NULL;
69 if (SQ_FAILED(sq_getinstanceup(vm, 2, &instance, 0)) || instance == NULL) return sq_throwerror(vm, "Pass an instance of a child class of AIInfo to RegisterAI");
70 AIInfo *info = (AIInfo *)instance;
71
72 SQInteger res = ScriptInfo::Constructor(vm, info);
73 if (res != 0) return res;
74
75 ScriptConfigItem config = _start_date_config;
76 config.name = stredup(config.name);
77 config.description = stredup(config.description);
78 info->config_list.push_front(config);
79
80 if (info->engine->MethodExists(*info->SQ_instance, "MinVersionToLoad")) {
81 if (!info->engine->CallIntegerMethod(*info->SQ_instance, "MinVersionToLoad", &info->min_loadable_version, MAX_GET_OPS)) return SQ_ERROR;
82 } else {
83 info->min_loadable_version = info->GetVersion();
84 }
85 /* When there is an UseAsRandomAI function, call it. */
86 if (info->engine->MethodExists(*info->SQ_instance, "UseAsRandomAI")) {
87 if (!info->engine->CallBoolMethod(*info->SQ_instance, "UseAsRandomAI", &info->use_as_random, MAX_GET_OPS)) return SQ_ERROR;
88 } else {
89 info->use_as_random = true;
90 }
91 /* Try to get the API version the AI is written for. */
92 if (info->engine->MethodExists(*info->SQ_instance, "GetAPIVersion")) {
93 if (!info->engine->CallStringMethodStrdup(*info->SQ_instance, "GetAPIVersion", &info->api_version, MAX_GET_OPS)) return SQ_ERROR;
94 if (!CheckAPIVersion(info->api_version)) {
95 DEBUG(script, 1, "Loading info.nut from (%s.%d): GetAPIVersion returned invalid version", info->GetName(), info->GetVersion());
96 return SQ_ERROR;
97 }
98 } else {
99 info->api_version = stredup("0.7");
100 }
101
102 /* Remove the link to the real instance, else it might get deleted by RegisterAI() */
103 sq_setinstanceup(vm, 2, NULL);
104 /* Register the AI to the base system */
105 info->GetScanner()->RegisterScript(info);
106 return 0;
107 }
108
109 /* static */ SQInteger AIInfo::DummyConstructor(HSQUIRRELVM vm)
110 {
111 /* Get the AIInfo */
112 SQUserPointer instance;
113 sq_getinstanceup(vm, 2, &instance, 0);
114 AIInfo *info = (AIInfo *)instance;
115 info->api_version = NULL;
116
117 SQInteger res = ScriptInfo::Constructor(vm, info);
118 if (res != 0) return res;
119
120 char buf[8];
121 seprintf(buf, lastof(buf), "%d.%d", GB(_openttd_newgrf_version, 28, 4), GB(_openttd_newgrf_version, 24, 4));
122 info->api_version = stredup(buf);
123
124 /* Remove the link to the real instance, else it might get deleted by RegisterAI() */
125 sq_setinstanceup(vm, 2, NULL);
126 /* Register the AI to the base system */
127 static_cast<AIScannerInfo *>(info->GetScanner())->SetDummyAI(info);
128 return 0;
129 }
130
131 AIInfo::AIInfo() :
132 min_loadable_version(0),
133 use_as_random(false),
134 api_version(NULL)
135 {
136 }
137
138 AIInfo::~AIInfo()
139 {
140 free(this->api_version);
141 }
142
143 bool AIInfo::CanLoadFromVersion(int version) const
144 {
145 if (version == -1) return true;
146 return version >= this->min_loadable_version && version <= this->GetVersion();
147 }
148
149
150 AILibrary::~AILibrary()
151 {
152 free(this->category);
153 }
154
155 /* static */ void AILibrary::RegisterAPI(Squirrel *engine)
156 {
157 /* Create the AILibrary class, and add the RegisterLibrary function */
158 engine->AddClassBegin("AILibrary");
159 engine->AddClassEnd();
160 engine->AddMethod("RegisterLibrary", &AILibrary::Constructor, 2, "tx");
161 }
162
163 /* static */ SQInteger AILibrary::Constructor(HSQUIRRELVM vm)
164 {
165 /* Create a new library */
166 AILibrary *library = new AILibrary();
167
168 SQInteger res = ScriptInfo::Constructor(vm, library);
169 if (res != 0) {
170 delete library;
171 return res;
172 }
173
174 /* Cache the category */
175 if (!library->CheckMethod("GetCategory") || !library->engine->CallStringMethodStrdup(*library->SQ_instance, "GetCategory", &library->category, MAX_GET_OPS)) {
176 delete library;
177 return SQ_ERROR;
178 }
179
180 /* Register the Library to the base system */
181 library->GetScanner()->RegisterScript(library);
182
183 return 0;
184 }