1 /*
2 script/common/c_content.cpp
3 Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
4 */
5
6 /*
7 This file is part of Freeminer.
8
9 Freeminer is free software: you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation, either version 3 of the License, or
12 (at your option) any later version.
13
14 Freeminer is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with Freeminer. If not, see <http://www.gnu.org/licenses/>.
21 */
22 #include "common/c_content.h"
23 #include "common/c_converter.h"
24 #include "common/c_types.h"
25 #include "nodedef.h"
26 #include "itemdef.h"
27 #include "object_properties.h"
28 #include "cpp_api/s_node.h"
29 #include "lua_api/l_object.h"
30 #include "lua_api/l_item.h"
31 #include "common/c_internal.h"
32 #include "server.h"
33 #include "log.h"
34 #include "tool.h"
35 #include "serverobject.h"
36 #include "porting.h"
37 #include "mg_schematic.h"
38 #include "noise.h"
39 #include "json/json.h"
40
41 struct EnumString es_TileAnimationType[] =
42 {
43 {TAT_NONE, "none"},
44 {TAT_VERTICAL_FRAMES, "vertical_frames"},
45 {0, NULL},
46 };
47
48 /******************************************************************************/
read_item_definition(lua_State * L,int index,ItemDefinition default_def)49 ItemDefinition read_item_definition(lua_State* L,int index,
50 ItemDefinition default_def)
51 {
52 if(index < 0)
53 index = lua_gettop(L) + 1 + index;
54
55 // Read the item definition
56 ItemDefinition def = default_def;
57
58 def.type = (ItemType)getenumfield(L, index, "type",
59 es_ItemType, ITEM_NONE);
60 getstringfield(L, index, "name", def.name);
61 getstringfield(L, index, "description", def.description);
62 getstringfield(L, index, "inventory_image", def.inventory_image);
63 getstringfield(L, index, "wield_image", def.wield_image);
64
65 lua_getfield(L, index, "wield_scale");
66 if(lua_istable(L, -1)){
67 def.wield_scale = check_v3f(L, -1);
68 }
69 lua_pop(L, 1);
70
71 def.stack_max = getintfield_default(L, index, "stack_max", def.stack_max);
72 if(def.stack_max == 0)
73 def.stack_max = 1;
74
75 lua_getfield(L, index, "on_use");
76 def.usable = lua_isfunction(L, -1);
77 lua_pop(L, 1);
78
79 getboolfield(L, index, "liquids_pointable", def.liquids_pointable);
80
81 warn_if_field_exists(L, index, "tool_digging_properties",
82 "deprecated: use tool_capabilities");
83
84 lua_getfield(L, index, "tool_capabilities");
85 if(lua_istable(L, -1)){
86 def.tool_capabilities = new ToolCapabilities(
87 read_tool_capabilities(L, -1));
88 }
89
90 // If name is "" (hand), ensure there are ToolCapabilities
91 // because it will be looked up there whenever any other item has
92 // no ToolCapabilities
93 if(def.name == "" && def.tool_capabilities == NULL){
94 def.tool_capabilities = new ToolCapabilities();
95 }
96
97 lua_getfield(L, index, "groups");
98 read_groups(L, -1, def.groups);
99 lua_pop(L, 1);
100
101 lua_getfield(L, index, "sounds");
102 if(lua_istable(L, -1)){
103 lua_getfield(L, -1, "place");
104 read_soundspec(L, -1, def.sound_place);
105 lua_pop(L, 1);
106 }
107 lua_pop(L, 1);
108
109 def.range = getfloatfield_default(L, index, "range", def.range);
110
111 // Client shall immediately place this node when player places the item.
112 // Server will update the precise end result a moment later.
113 // "" = no prediction
114 getstringfield(L, index, "node_placement_prediction",
115 def.node_placement_prediction);
116
117 return def;
118 }
119
120 /******************************************************************************/
read_object_properties(lua_State * L,int index,ObjectProperties * prop)121 void read_object_properties(lua_State *L, int index,
122 ObjectProperties *prop)
123 {
124 if(index < 0)
125 index = lua_gettop(L) + 1 + index;
126 if(!lua_istable(L, index))
127 return;
128
129 prop->hp_max = getintfield_default(L, -1, "hp_max", 10);
130
131 getboolfield(L, -1, "physical", prop->physical);
132 getboolfield(L, -1, "collide_with_objects", prop->collideWithObjects);
133
134 getfloatfield(L, -1, "weight", prop->weight);
135
136 lua_getfield(L, -1, "collisionbox");
137 if(lua_istable(L, -1))
138 prop->collisionbox = read_aabb3f(L, -1, 1.0);
139 lua_pop(L, 1);
140
141 getstringfield(L, -1, "visual", prop->visual);
142
143 getstringfield(L, -1, "mesh", prop->mesh);
144
145 lua_getfield(L, -1, "visual_size");
146 if(lua_istable(L, -1))
147 prop->visual_size = read_v2f(L, -1);
148 lua_pop(L, 1);
149
150 lua_getfield(L, -1, "textures");
151 if(lua_istable(L, -1)){
152 prop->textures.clear();
153 int table = lua_gettop(L);
154 lua_pushnil(L);
155 while(lua_next(L, table) != 0){
156 // key at index -2 and value at index -1
157 if(lua_isstring(L, -1))
158 prop->textures.push_back(lua_tostring(L, -1));
159 else
160 prop->textures.push_back("");
161 // removes value, keeps key for next iteration
162 lua_pop(L, 1);
163 }
164 }
165 lua_pop(L, 1);
166
167 lua_getfield(L, -1, "colors");
168 if(lua_istable(L, -1)){
169 prop->colors.clear();
170 int table = lua_gettop(L);
171 lua_pushnil(L);
172 while(lua_next(L, table) != 0){
173 // key at index -2 and value at index -1
174 if(lua_isstring(L, -1))
175 prop->colors.push_back(readARGB8(L, -1));
176 else
177 prop->colors.push_back(video::SColor(255, 255, 255, 255));
178 // removes value, keeps key for next iteration
179 lua_pop(L, 1);
180 }
181 }
182 lua_pop(L, 1);
183
184 lua_getfield(L, -1, "spritediv");
185 if(lua_istable(L, -1))
186 prop->spritediv = read_v2s16(L, -1);
187 lua_pop(L, 1);
188
189 lua_getfield(L, -1, "initial_sprite_basepos");
190 if(lua_istable(L, -1))
191 prop->initial_sprite_basepos = read_v2s16(L, -1);
192 lua_pop(L, 1);
193
194 getboolfield(L, -1, "is_visible", prop->is_visible);
195 getboolfield(L, -1, "makes_footstep_sound", prop->makes_footstep_sound);
196 getfloatfield(L, -1, "automatic_rotate", prop->automatic_rotate);
197 getfloatfield(L, -1, "stepheight", prop->stepheight);
198 prop->stepheight*=BS;
199 lua_getfield(L, -1, "automatic_face_movement_dir");
200 if (lua_isnumber(L, -1)) {
201 prop->automatic_face_movement_dir = true;
202 prop->automatic_face_movement_dir_offset = luaL_checknumber(L, -1);
203 } else if (lua_isboolean(L, -1)) {
204 prop->automatic_face_movement_dir = lua_toboolean(L, -1);
205 prop->automatic_face_movement_dir_offset = 0.0;
206 }
207 lua_pop(L, 1);
208 }
209
210 /******************************************************************************/
read_tiledef(lua_State * L,int index)211 TileDef read_tiledef(lua_State *L, int index)
212 {
213 if(index < 0)
214 index = lua_gettop(L) + 1 + index;
215
216 TileDef tiledef;
217
218 // key at index -2 and value at index
219 if(lua_isstring(L, index)){
220 // "default_lava.png"
221 tiledef.name = lua_tostring(L, index);
222 }
223 else if(lua_istable(L, index))
224 {
225 // {name="default_lava.png", animation={}}
226 tiledef.name = "";
227 getstringfield(L, index, "name", tiledef.name);
228 getstringfield(L, index, "image", tiledef.name); // MaterialSpec compat.
229 tiledef.backface_culling = getboolfield_default(
230 L, index, "backface_culling", true);
231 // animation = {}
232 lua_getfield(L, index, "animation");
233 if(lua_istable(L, -1)){
234 // {type="vertical_frames", aspect_w=16, aspect_h=16, length=2.0}
235 tiledef.animation.type = (TileAnimationType)
236 getenumfield(L, -1, "type", es_TileAnimationType,
237 TAT_NONE);
238 tiledef.animation.aspect_w =
239 getintfield_default(L, -1, "aspect_w", 16);
240 tiledef.animation.aspect_h =
241 getintfield_default(L, -1, "aspect_h", 16);
242 tiledef.animation.length =
243 getfloatfield_default(L, -1, "length", 1.0);
244 }
245 lua_pop(L, 1);
246 }
247
248 return tiledef;
249 }
250
251 /******************************************************************************/
read_content_features(lua_State * L,int index)252 ContentFeatures read_content_features(lua_State *L, int index)
253 {
254 if(index < 0)
255 index = lua_gettop(L) + 1 + index;
256
257 ContentFeatures f;
258
259 /* Cache existence of some callbacks */
260 lua_getfield(L, index, "on_construct");
261 if(!lua_isnil(L, -1)) f.has_on_construct = true;
262 lua_pop(L, 1);
263 lua_getfield(L, index, "on_destruct");
264 if(!lua_isnil(L, -1)) f.has_on_destruct = true;
265 lua_pop(L, 1);
266 lua_getfield(L, index, "after_destruct");
267 if(!lua_isnil(L, -1)) f.has_after_destruct = true;
268 lua_pop(L, 1);
269 lua_getfield(L, index, "on_activate");
270 if(!lua_isnil(L, -1))
271 {
272 f.has_on_activate = true;
273 f.is_circuit_element = true;
274 }
275 lua_pop(L, 1);
276 lua_getfield(L, index, "on_deactivate");
277 if(!lua_isnil(L, -1))
278 {
279 f.has_on_deactivate = true;
280 f.is_circuit_element = true;
281 }
282 lua_pop(L, 1);
283
284 lua_getfield(L, index, "on_rightclick");
285 f.rightclickable = lua_isfunction(L, -1);
286 lua_pop(L, 1);
287
288 /* Name */
289 getstringfield(L, index, "name", f.name);
290
291 /* Groups */
292 lua_getfield(L, index, "groups");
293 read_groups(L, -1, f.groups);
294 lua_pop(L, 1);
295
296 /* Visual definition */
297
298 f.drawtype = (NodeDrawType)getenumfield(L, index, "drawtype",
299 ScriptApiNode::es_DrawType,NDT_NORMAL);
300 getfloatfield(L, index, "visual_scale", f.visual_scale);
301
302 /* Meshnode model filename */
303 getstringfield(L, index, "mesh", f.mesh);
304
305 // tiles = {}
306 lua_getfield(L, index, "tiles");
307 // If nil, try the deprecated name "tile_images" instead
308 if(lua_isnil(L, -1)){
309 lua_pop(L, 1);
310 warn_if_field_exists(L, index, "tile_images",
311 "Deprecated; new name is \"tiles\".");
312 lua_getfield(L, index, "tile_images");
313 }
314 if(lua_istable(L, -1)){
315 int table = lua_gettop(L);
316 lua_pushnil(L);
317 int i = 0;
318 while(lua_next(L, table) != 0){
319 // Read tiledef from value
320 f.tiledef[i] = read_tiledef(L, -1);
321 // removes value, keeps key for next iteration
322 lua_pop(L, 1);
323 i++;
324 if(i==6){
325 lua_pop(L, 1);
326 break;
327 }
328 }
329 // Copy last value to all remaining textures
330 if(i >= 1){
331 TileDef lasttile = f.tiledef[i-1];
332 while(i < 6){
333 f.tiledef[i] = lasttile;
334 i++;
335 }
336 }
337 }
338 lua_pop(L, 1);
339
340 /* Circuit options */
341 lua_getfield(L, index, "is_wire");
342 if(!lua_isnil(L, -1)) {
343 f.is_wire = true;
344 }
345 lua_pop(L, 1);
346
347 lua_getfield(L, index, "is_wire_connector");
348 if(!lua_isnil(L, -1)) {
349 f.is_wire_connector = true;
350 }
351 lua_pop(L, 1);
352
353 lua_getfield(L, index, "wire_connections");
354 if(!lua_isnil(L, -1) && lua_istable(L, -1)) {
355 // Both can't be set to true
356 f.is_wire |= !f.is_wire_connector;
357 int table = lua_gettop(L);
358 lua_pushnil(L);
359 int i;
360 unsigned char current_shift = 1;
361 for(i = 0; (i < 6) && (lua_next(L, table) != 0); ++i) {
362 f.wire_connections[i] = lua_tonumber(L, -1);
363 f.wire_connections[i] |= current_shift;
364 current_shift <<= 1;
365 lua_pop(L, 1);
366 }
367 if(i < 6) {
368 luaL_error(L, "Wire connectins array must have exactly 6 integer numbers.");
369 }
370
371 // Convert to two-way wire (one-way may cause undefined behavior)
372 for(i = 0; i < 6; ++i) {
373 for(int j = 0; j < 6; ++j) {
374 f.wire_connections[i] |= f.wire_connections[j] & (1 << i);
375 f.wire_connections[j] |= f.wire_connections[i] & (1 << j);
376 }
377 }
378
379 } else if(f.is_wire || f.is_wire_connector) {
380 // Assuming that it's a standart wire or wire connector
381 for(int i = 0; i < 6; ++i) {
382 f.wire_connections[i] = 0x3F;
383 }
384 }
385 lua_pop(L, 1);
386
387 lua_getfield(L, index, "circuit_states");
388 if(!lua_isnil(L, -1) && lua_istable(L, -1)) {
389 f.is_circuit_element = true;
390 int table = lua_gettop(L);
391 lua_pushnil(L);
392 int i;
393 for(i = 0; (i < 64) && (lua_next(L, table) != 0); ++i) {
394 f.circuit_element_func[i] = lua_tonumber(L, -1);
395 lua_pop(L, 1);
396 }
397 if(i < 64) {
398 luaL_error(L, "Circuit element states table must have exactly 64 integer numbers.");
399 }
400 }
401 lua_pop(L, 1);
402
403 f.circuit_element_delay = getintfield_default(L, index, "circuit_element_delay", f.circuit_element_delay + 1) - 1;
404 if(f.circuit_element_delay > 100) {
405 luaL_error(L, "\"circuit_element_delay\" must be a positive integer number less than 101");
406 }
407
408 // special_tiles = {}
409 lua_getfield(L, index, "special_tiles");
410 // If nil, try the deprecated name "special_materials" instead
411 if(lua_isnil(L, -1)){
412 lua_pop(L, 1);
413 warn_if_field_exists(L, index, "special_materials",
414 "Deprecated; new name is \"special_tiles\".");
415 lua_getfield(L, index, "special_materials");
416 }
417 if(lua_istable(L, -1)){
418 int table = lua_gettop(L);
419 lua_pushnil(L);
420 int i = 0;
421 while(lua_next(L, table) != 0){
422 // Read tiledef from value
423 f.tiledef_special[i] = read_tiledef(L, -1);
424 // removes value, keeps key for next iteration
425 lua_pop(L, 1);
426 i++;
427 if(i==CF_SPECIAL_COUNT){
428 lua_pop(L, 1);
429 break;
430 }
431 }
432 }
433 lua_pop(L, 1);
434
435 f.alpha = getintfield_default(L, index, "alpha", 255);
436
437 bool usealpha = getboolfield_default(L, index,
438 "use_texture_alpha", false);
439 if (usealpha)
440 f.alpha = 0;
441
442 /* Other stuff */
443
444 lua_getfield(L, index, "post_effect_color");
445 if(!lua_isnil(L, -1))
446 f.post_effect_color = readARGB8(L, -1);
447 lua_pop(L, 1);
448
449 f.param_type = (ContentParamType)getenumfield(L, index, "paramtype",
450 ScriptApiNode::es_ContentParamType, CPT_NONE);
451 f.param_type_2 = (ContentParamType2)getenumfield(L, index, "paramtype2",
452 ScriptApiNode::es_ContentParamType2, CPT2_NONE);
453
454 // Warn about some deprecated fields
455 warn_if_field_exists(L, index, "wall_mounted",
456 "deprecated: use paramtype2 = 'wallmounted'");
457 warn_if_field_exists(L, index, "light_propagates",
458 "deprecated: determined from paramtype");
459 warn_if_field_exists(L, index, "dug_item",
460 "deprecated: use 'drop' field");
461 warn_if_field_exists(L, index, "extra_dug_item",
462 "deprecated: use 'drop' field");
463 warn_if_field_exists(L, index, "extra_dug_item_rarity",
464 "deprecated: use 'drop' field");
465 warn_if_field_exists(L, index, "metadata_name",
466 "deprecated: use on_add and metadata callbacks");
467
468 // True for all ground-like things like stone and mud, false for eg. trees
469 getboolfield(L, index, "is_ground_content", f.is_ground_content);
470 f.light_propagates = (f.param_type == CPT_LIGHT);
471 getboolfield(L, index, "sunlight_propagates", f.sunlight_propagates);
472 // This is used for collision detection.
473 // Also for general solidness queries.
474 getboolfield(L, index, "walkable", f.walkable);
475 // Player can point to these
476 getboolfield(L, index, "pointable", f.pointable);
477 // Player can dig these
478 getboolfield(L, index, "diggable", f.diggable);
479 // Player can climb these
480 getboolfield(L, index, "climbable", f.climbable);
481 // Player can build on these
482 getboolfield(L, index, "buildable_to", f.buildable_to);
483 // Whether the node is non-liquid, source liquid or flowing liquid
484 f.liquid_type = (LiquidType)getenumfield(L, index, "liquidtype",
485 ScriptApiNode::es_LiquidType, LIQUID_NONE);
486 // If the content is liquid, this is the flowing version of the liquid.
487 getstringfield(L, index, "liquid_alternative_flowing",
488 f.liquid_alternative_flowing);
489 // If the content is liquid, this is the source version of the liquid.
490 getstringfield(L, index, "liquid_alternative_source",
491 f.liquid_alternative_source);
492 // Viscosity for fluid flow, ranging from 1 to 7, with
493 // 1 giving almost instantaneous propagation and 7 being
494 // the slowest possible
495 f.liquid_viscosity = getintfield_default(L, index,
496 "liquid_viscosity", f.liquid_viscosity);
497
498 f.leveled = getintfield_default(L, index, "leveled", f.leveled);
499
500 getboolfield(L, index, "liquid_renewable", f.liquid_renewable);
501 getstringfield(L, index, "freeze", f.freeze);
502 getstringfield(L, index, "melt", f.melt);
503 f.drowning = getintfield_default(L, index,
504 "drowning", f.drowning);
505 // Amount of light the node emits
506 f.light_source = getintfield_default(L, index,
507 "light_source", f.light_source);
508 f.damage_per_second = getintfield_default(L, index,
509 "damage_per_second", f.damage_per_second);
510
511 lua_getfield(L, index, "node_box");
512 if(lua_istable(L, -1))
513 f.node_box = read_nodebox(L, -1);
514 lua_pop(L, 1);
515
516 lua_getfield(L, index, "selection_box");
517 if(lua_istable(L, -1))
518 f.selection_box = read_nodebox(L, -1);
519 lua_pop(L, 1);
520
521 lua_getfield(L, index, "collision_box");
522 if(lua_istable(L, -1))
523 f.collision_box = read_nodebox(L, -1);
524 lua_pop(L, 1);
525
526 f.waving = getintfield_default(L, index,
527 "waving", f.waving);
528
529 // Set to true if paramtype used to be 'facedir_simple'
530 getboolfield(L, index, "legacy_facedir_simple", f.legacy_facedir_simple);
531 // Set to true if wall_mounted used to be set to true
532 getboolfield(L, index, "legacy_wallmounted", f.legacy_wallmounted);
533
534 // Sound table
535 lua_getfield(L, index, "sounds");
536 if(lua_istable(L, -1)){
537 lua_getfield(L, -1, "footstep");
538 read_soundspec(L, -1, f.sound_footstep);
539 lua_pop(L, 1);
540 lua_getfield(L, -1, "dig");
541 read_soundspec(L, -1, f.sound_dig);
542 lua_pop(L, 1);
543 lua_getfield(L, -1, "dug");
544 read_soundspec(L, -1, f.sound_dug);
545 lua_pop(L, 1);
546 }
547 lua_pop(L, 1);
548
549 return f;
550 }
551
552 /******************************************************************************/
read_server_sound_params(lua_State * L,int index,ServerSoundParams & params)553 void read_server_sound_params(lua_State *L, int index,
554 ServerSoundParams ¶ms)
555 {
556 if(index < 0)
557 index = lua_gettop(L) + 1 + index;
558 // Clear
559 params = ServerSoundParams();
560 if(lua_istable(L, index)){
561 getfloatfield(L, index, "gain", params.gain);
562 getstringfield(L, index, "to_player", params.to_player);
563 lua_getfield(L, index, "pos");
564 if(!lua_isnil(L, -1)){
565 v3f p = read_v3f(L, -1)*BS;
566 params.pos = p;
567 params.type = ServerSoundParams::SSP_POSITIONAL;
568 }
569 lua_pop(L, 1);
570 lua_getfield(L, index, "object");
571 if(!lua_isnil(L, -1)){
572 ObjectRef *ref = ObjectRef::checkobject(L, -1);
573 ServerActiveObject *sao = ObjectRef::getobject(ref);
574 if(sao){
575 params.object = sao->getId();
576 params.type = ServerSoundParams::SSP_OBJECT;
577 }
578 }
579 lua_pop(L, 1);
580 params.max_hear_distance = BS*getfloatfield_default(L, index,
581 "max_hear_distance", params.max_hear_distance/BS);
582 getboolfield(L, index, "loop", params.loop);
583 }
584 }
585
586 /******************************************************************************/
read_soundspec(lua_State * L,int index,SimpleSoundSpec & spec)587 void read_soundspec(lua_State *L, int index, SimpleSoundSpec &spec)
588 {
589 if(index < 0)
590 index = lua_gettop(L) + 1 + index;
591 if(lua_isnil(L, index)){
592 } else if(lua_istable(L, index)){
593 getstringfield(L, index, "name", spec.name);
594 getfloatfield(L, index, "gain", spec.gain);
595 } else if(lua_isstring(L, index)){
596 spec.name = lua_tostring(L, index);
597 }
598 }
599
600 /******************************************************************************/
read_nodebox(lua_State * L,int index)601 NodeBox read_nodebox(lua_State *L, int index)
602 {
603 NodeBox nodebox;
604 if(lua_istable(L, -1)){
605 nodebox.type = (NodeBoxType)getenumfield(L, index, "type",
606 ScriptApiNode::es_NodeBoxType, NODEBOX_REGULAR);
607
608 lua_getfield(L, index, "fixed");
609 if(lua_istable(L, -1))
610 nodebox.fixed = read_aabb3f_vector(L, -1, BS);
611 lua_pop(L, 1);
612
613 lua_getfield(L, index, "wall_top");
614 if(lua_istable(L, -1))
615 nodebox.wall_top = read_aabb3f(L, -1, BS);
616 lua_pop(L, 1);
617
618 lua_getfield(L, index, "wall_bottom");
619 if(lua_istable(L, -1))
620 nodebox.wall_bottom = read_aabb3f(L, -1, BS);
621 lua_pop(L, 1);
622
623 lua_getfield(L, index, "wall_side");
624 if(lua_istable(L, -1))
625 nodebox.wall_side = read_aabb3f(L, -1, BS);
626 lua_pop(L, 1);
627 }
628 return nodebox;
629 }
630
631 /******************************************************************************/
readnode(lua_State * L,int index,INodeDefManager * ndef)632 MapNode readnode(lua_State *L, int index, INodeDefManager *ndef)
633 {
634 lua_getfield(L, index, "name");
635 const char *name = luaL_checkstring(L, -1);
636 lua_pop(L, 1);
637 u8 param1;
638 lua_getfield(L, index, "param1");
639 if(lua_isnil(L, -1))
640 param1 = 0;
641 else
642 param1 = lua_tonumber(L, -1);
643 lua_pop(L, 1);
644 u8 param2;
645 lua_getfield(L, index, "param2");
646 if(lua_isnil(L, -1))
647 param2 = 0;
648 else
649 param2 = lua_tonumber(L, -1);
650 lua_pop(L, 1);
651 return MapNode(ndef, name, param1, param2);
652 }
653
654 /******************************************************************************/
pushnode(lua_State * L,const MapNode & n,INodeDefManager * ndef)655 void pushnode(lua_State *L, const MapNode &n, INodeDefManager *ndef)
656 {
657 lua_newtable(L);
658 lua_pushstring(L, ndef->get(n).name.c_str());
659 lua_setfield(L, -2, "name");
660 lua_pushnumber(L, n.getParam1());
661 lua_setfield(L, -2, "param1");
662 lua_pushnumber(L, n.getParam2());
663 lua_setfield(L, -2, "param2");
664 }
665
666 /******************************************************************************/
warn_if_field_exists(lua_State * L,int table,const char * fieldname,const std::string & message)667 void warn_if_field_exists(lua_State *L, int table,
668 const char *fieldname, const std::string &message)
669 {
670 lua_getfield(L, table, fieldname);
671 if(!lua_isnil(L, -1)){
672 //TODO find way to access backtrace fct from here
673 // infostream<<script_get_backtrace(L)<<std::endl;
674 infostream<<"WARNING: field \""<<fieldname<<"\": "
675 <<message<<std::endl;
676 }
677 lua_pop(L, 1);
678 }
679
680 /******************************************************************************/
getenumfield(lua_State * L,int table,const char * fieldname,const EnumString * spec,int default_)681 int getenumfield(lua_State *L, int table,
682 const char *fieldname, const EnumString *spec, int default_)
683 {
684 int result = default_;
685 string_to_enum(spec, result,
686 getstringfield_default(L, table, fieldname, ""));
687 return result;
688 }
689
690 /******************************************************************************/
string_to_enum(const EnumString * spec,int & result,const std::string & str)691 bool string_to_enum(const EnumString *spec, int &result,
692 const std::string &str)
693 {
694 const EnumString *esp = spec;
695 while(esp->str){
696 if(str == std::string(esp->str)){
697 result = esp->num;
698 return true;
699 }
700 esp++;
701 }
702 return false;
703 }
704
705 /******************************************************************************/
read_item(lua_State * L,int index,Server * srv)706 ItemStack read_item(lua_State* L, int index,Server* srv)
707 {
708 if(index < 0)
709 index = lua_gettop(L) + 1 + index;
710
711 if(lua_isnil(L, index))
712 {
713 return ItemStack();
714 }
715 else if(lua_isuserdata(L, index))
716 {
717 // Convert from LuaItemStack
718 LuaItemStack *o = LuaItemStack::checkobject(L, index);
719 return o->getItem();
720 }
721 else if(lua_isstring(L, index))
722 {
723 // Convert from itemstring
724 std::string itemstring = lua_tostring(L, index);
725 IItemDefManager *idef = srv->idef();
726 try
727 {
728 ItemStack item;
729 item.deSerialize(itemstring, idef);
730 return item;
731 }
732 catch(SerializationError &e)
733 {
734 infostream<<"WARNING: unable to create item from itemstring"
735 <<": "<<itemstring<<std::endl;
736 return ItemStack();
737 }
738 }
739 else if(lua_istable(L, index))
740 {
741 // Convert from table
742 IItemDefManager *idef = srv->idef();
743 std::string name = getstringfield_default(L, index, "name", "");
744 int count = getintfield_default(L, index, "count", 1);
745 int wear = getintfield_default(L, index, "wear", 0);
746 std::string metadata = getstringfield_default(L, index, "metadata", "");
747 return ItemStack(name, count, wear, metadata, idef);
748 }
749 else
750 {
751 throw LuaError("Expecting itemstack, itemstring, table or nil");
752 }
753 }
754
755 /******************************************************************************/
push_tool_capabilities(lua_State * L,const ToolCapabilities & toolcap)756 void push_tool_capabilities(lua_State *L,
757 const ToolCapabilities &toolcap)
758 {
759 lua_newtable(L);
760 setfloatfield(L, -1, "full_punch_interval", toolcap.full_punch_interval);
761 setintfield(L, -1, "max_drop_level", toolcap.max_drop_level);
762 // Create groupcaps table
763 lua_newtable(L);
764 // For each groupcap
765 for(std::map<std::string, ToolGroupCap>::const_iterator
766 i = toolcap.groupcaps.begin(); i != toolcap.groupcaps.end(); i++){
767 // Create groupcap table
768 lua_newtable(L);
769 const std::string &name = i->first;
770 const ToolGroupCap &groupcap = i->second;
771 // Create subtable "times"
772 lua_newtable(L);
773 for(std::map<int, float>::const_iterator
774 i = groupcap.times.begin(); i != groupcap.times.end(); i++){
775 int rating = i->first;
776 float time = i->second;
777 lua_pushinteger(L, rating);
778 lua_pushnumber(L, time);
779 lua_settable(L, -3);
780 }
781 // Set subtable "times"
782 lua_setfield(L, -2, "times");
783 // Set simple parameters
784 setintfield(L, -1, "maxlevel", groupcap.maxlevel);
785 setintfield(L, -1, "uses", groupcap.uses);
786 // Insert groupcap table into groupcaps table
787 lua_setfield(L, -2, name.c_str());
788 }
789 // Set groupcaps table
790 lua_setfield(L, -2, "groupcaps");
791 //Create damage_groups table
792 lua_newtable(L);
793 // For each damage group
794 for(std::map<std::string, s16>::const_iterator
795 i = toolcap.damageGroups.begin(); i != toolcap.damageGroups.end(); i++){
796 // Create damage group table
797 lua_pushinteger(L, i->second);
798 lua_setfield(L, -2, i->first.c_str());
799 }
800 lua_setfield(L, -2, "damage_groups");
801 }
802
803 /******************************************************************************/
push_inventory_list(lua_State * L,Inventory * inv,const char * name)804 void push_inventory_list(lua_State *L, Inventory *inv, const char *name)
805 {
806 InventoryList *invlist = inv->getList(name);
807 if(invlist == NULL){
808 lua_pushnil(L);
809 return;
810 }
811 std::vector<ItemStack> items;
812 for(u32 i=0; i<invlist->getSize(); i++)
813 items.push_back(invlist->getItem(i));
814 push_items(L, items);
815 }
816
817 /******************************************************************************/
read_inventory_list(lua_State * L,int tableindex,Inventory * inv,const char * name,Server * srv,int forcesize)818 void read_inventory_list(lua_State *L, int tableindex,
819 Inventory *inv, const char *name, Server* srv, int forcesize)
820 {
821 if(tableindex < 0)
822 tableindex = lua_gettop(L) + 1 + tableindex;
823 // If nil, delete list
824 if(lua_isnil(L, tableindex)){
825 inv->deleteList(name);
826 return;
827 }
828 // Otherwise set list
829 std::vector<ItemStack> items = read_items(L, tableindex,srv);
830 int listsize = (forcesize != -1) ? forcesize : items.size();
831 InventoryList *invlist = inv->addList(name, listsize);
832 int index = 0;
833 for(std::vector<ItemStack>::const_iterator
834 i = items.begin(); i != items.end(); i++){
835 if(forcesize != -1 && index == forcesize)
836 break;
837 invlist->changeItem(index, *i);
838 index++;
839 }
840 while(forcesize != -1 && index < forcesize){
841 invlist->deleteItem(index);
842 index++;
843 }
844 }
845
846 /******************************************************************************/
read_tool_capabilities(lua_State * L,int table)847 ToolCapabilities read_tool_capabilities(
848 lua_State *L, int table)
849 {
850 ToolCapabilities toolcap;
851 getfloatfield(L, table, "full_punch_interval", toolcap.full_punch_interval);
852 getintfield(L, table, "max_drop_level", toolcap.max_drop_level);
853 lua_getfield(L, table, "groupcaps");
854 if(lua_istable(L, -1)){
855 int table_groupcaps = lua_gettop(L);
856 lua_pushnil(L);
857 while(lua_next(L, table_groupcaps) != 0){
858 // key at index -2 and value at index -1
859 std::string groupname = luaL_checkstring(L, -2);
860 if(lua_istable(L, -1)){
861 int table_groupcap = lua_gettop(L);
862 // This will be created
863 ToolGroupCap groupcap;
864 // Read simple parameters
865 getintfield(L, table_groupcap, "maxlevel", groupcap.maxlevel);
866 getintfield(L, table_groupcap, "uses", groupcap.uses);
867 // DEPRECATED: maxwear
868 float maxwear = 0;
869 if(getfloatfield(L, table_groupcap, "maxwear", maxwear)){
870 if(maxwear != 0)
871 groupcap.uses = 1.0/maxwear;
872 else
873 groupcap.uses = 0;
874 infostream<<script_get_backtrace(L)<<std::endl;
875 infostream<<"WARNING: field \"maxwear\" is deprecated; "
876 <<"should replace with uses=1/maxwear"<<std::endl;
877 }
878 // Read "times" table
879 lua_getfield(L, table_groupcap, "times");
880 if(lua_istable(L, -1)){
881 int table_times = lua_gettop(L);
882 lua_pushnil(L);
883 while(lua_next(L, table_times) != 0){
884 // key at index -2 and value at index -1
885 int rating = luaL_checkinteger(L, -2);
886 float time = luaL_checknumber(L, -1);
887 groupcap.times[rating] = time;
888 // removes value, keeps key for next iteration
889 lua_pop(L, 1);
890 }
891 }
892 lua_pop(L, 1);
893 // Insert groupcap into toolcap
894 toolcap.groupcaps[groupname] = groupcap;
895 }
896 // removes value, keeps key for next iteration
897 lua_pop(L, 1);
898 }
899 }
900 lua_pop(L, 1);
901
902 lua_getfield(L, table, "damage_groups");
903 if(lua_istable(L, -1)){
904 int table_damage_groups = lua_gettop(L);
905 lua_pushnil(L);
906 while(lua_next(L, table_damage_groups) != 0){
907 // key at index -2 and value at index -1
908 std::string groupname = luaL_checkstring(L, -2);
909 u16 value = luaL_checkinteger(L, -1);
910 toolcap.damageGroups[groupname] = value;
911 // removes value, keeps key for next iteration
912 lua_pop(L, 1);
913 }
914 }
915 lua_pop(L, 1);
916 return toolcap;
917 }
918
919 /******************************************************************************/
push_dig_params(lua_State * L,const DigParams & params)920 void push_dig_params(lua_State *L,const DigParams ¶ms)
921 {
922 lua_newtable(L);
923 setboolfield(L, -1, "diggable", params.diggable);
924 setfloatfield(L, -1, "time", params.time);
925 setintfield(L, -1, "wear", params.wear);
926 }
927
928 /******************************************************************************/
push_hit_params(lua_State * L,const HitParams & params)929 void push_hit_params(lua_State *L,const HitParams ¶ms)
930 {
931 lua_newtable(L);
932 setintfield(L, -1, "hp", params.hp);
933 setintfield(L, -1, "wear", params.wear);
934 }
935
936 /******************************************************************************/
937
getflagsfield(lua_State * L,int table,const char * fieldname,FlagDesc * flagdesc,u32 * flags,u32 * flagmask)938 bool getflagsfield(lua_State *L, int table, const char *fieldname,
939 FlagDesc *flagdesc, u32 *flags, u32 *flagmask)
940 {
941 lua_getfield(L, table, fieldname);
942
943 bool success = read_flags(L, -1, flagdesc, flags, flagmask);
944
945 lua_pop(L, 1);
946
947 return success;
948 }
949
read_flags(lua_State * L,int index,FlagDesc * flagdesc,u32 * flags,u32 * flagmask)950 bool read_flags(lua_State *L, int index, FlagDesc *flagdesc,
951 u32 *flags, u32 *flagmask)
952 {
953 if (lua_isstring(L, index)) {
954 std::string flagstr = lua_tostring(L, index);
955 *flags = readFlagString(flagstr, flagdesc, flagmask);
956 } else if (lua_istable(L, index)) {
957 *flags = read_flags_table(L, index, flagdesc, flagmask);
958 } else {
959 return false;
960 }
961
962 return true;
963 }
964
read_flags_table(lua_State * L,int table,FlagDesc * flagdesc,u32 * flagmask)965 u32 read_flags_table(lua_State *L, int table, FlagDesc *flagdesc, u32 *flagmask)
966 {
967 u32 flags = 0, mask = 0;
968 char fnamebuf[64] = "no";
969
970 for (int i = 0; flagdesc[i].name; i++) {
971 bool result;
972
973 if (getboolfield(L, table, flagdesc[i].name, result)) {
974 mask |= flagdesc[i].flag;
975 if (result)
976 flags |= flagdesc[i].flag;
977 }
978
979 strlcpy(fnamebuf + 2, flagdesc[i].name, sizeof(fnamebuf) - 2);
980 if (getboolfield(L, table, fnamebuf, result))
981 mask |= flagdesc[i].flag;
982 }
983
984 if (flagmask)
985 *flagmask = mask;
986
987 return flags;
988 }
989
990 /******************************************************************************/
991 /* Lua Stored data! */
992 /******************************************************************************/
993
994 /******************************************************************************/
read_groups(lua_State * L,int index,std::map<std::string,int> & result)995 void read_groups(lua_State *L, int index,
996 std::map<std::string, int> &result)
997 {
998 if (!lua_istable(L,index))
999 return;
1000 result.clear();
1001 lua_pushnil(L);
1002 if(index < 0)
1003 index -= 1;
1004 while(lua_next(L, index) != 0){
1005 // key at index -2 and value at index -1
1006 std::string name = luaL_checkstring(L, -2);
1007 int rating = luaL_checkinteger(L, -1);
1008 result[name] = rating;
1009 // removes value, keeps key for next iteration
1010 lua_pop(L, 1);
1011 }
1012 }
1013
1014 /******************************************************************************/
push_items(lua_State * L,const std::vector<ItemStack> & items)1015 void push_items(lua_State *L, const std::vector<ItemStack> &items)
1016 {
1017 // Create and fill table
1018 lua_createtable(L, items.size(), 0);
1019 std::vector<ItemStack>::const_iterator iter = items.begin();
1020 for (u32 i = 0; iter != items.end(); iter++) {
1021 LuaItemStack::create(L, *iter);
1022 lua_rawseti(L, -2, ++i);
1023 }
1024 }
1025
1026 /******************************************************************************/
read_items(lua_State * L,int index,Server * srv)1027 std::vector<ItemStack> read_items(lua_State *L, int index, Server *srv)
1028 {
1029 if(index < 0)
1030 index = lua_gettop(L) + 1 + index;
1031
1032 std::vector<ItemStack> items;
1033 luaL_checktype(L, index, LUA_TTABLE);
1034 lua_pushnil(L);
1035 while (lua_next(L, index)) {
1036 s32 key = luaL_checkinteger(L, -2);
1037 if (key < 1) {
1038 throw LuaError("Invalid inventory list index");
1039 }
1040 if (items.size() < (u32) key) {
1041 items.resize(key);
1042 }
1043 items[key - 1] = read_item(L, -1, srv);
1044 lua_pop(L, 1);
1045 }
1046 return items;
1047 }
1048
1049 /******************************************************************************/
luaentity_get(lua_State * L,u16 id)1050 void luaentity_get(lua_State *L, u16 id)
1051 {
1052 // Get luaentities[i]
1053 lua_getglobal(L, "core");
1054 lua_getfield(L, -1, "luaentities");
1055 luaL_checktype(L, -1, LUA_TTABLE);
1056 lua_pushnumber(L, id);
1057 lua_gettable(L, -2);
1058 lua_remove(L, -2); // Remove luaentities
1059 lua_remove(L, -2); // Remove core
1060 }
1061
1062 /******************************************************************************/
read_noiseparams(lua_State * L,int index)1063 NoiseParams *read_noiseparams(lua_State *L, int index)
1064 {
1065 NoiseParams *np = new NoiseParams;
1066
1067 if (!read_noiseparams_nc(L, index, np)) {
1068 delete np;
1069 np = NULL;
1070 }
1071
1072 return np;
1073 }
1074
read_noiseparams_nc(lua_State * L,int index,NoiseParams * np)1075 bool read_noiseparams_nc(lua_State *L, int index, NoiseParams *np)
1076 {
1077 if (index < 0)
1078 index = lua_gettop(L) + 1 + index;
1079
1080 if (!lua_istable(L, index))
1081 return false;
1082
1083 np->offset = getfloatfield_default(L, index, "offset", 0.0);
1084 np->scale = getfloatfield_default(L, index, "scale", 0.0);
1085 np->persist = getfloatfield_default(L, index, "persist", 0.0);
1086 np->seed = getintfield_default(L, index, "seed", 0);
1087 np->octaves = getintfield_default(L, index, "octaves", 0);
1088 np->eased = getboolfield_default(L, index, "eased", false);
1089
1090 lua_getfield(L, index, "spread");
1091 np->spread = read_v3f(L, -1);
1092 lua_pop(L, 1);
1093
1094 return true;
1095 }
1096
1097 /******************************************************************************/
1098
get_schematic(lua_State * L,int index,Schematic * schem,INodeDefManager * ndef,std::map<std::string,std::string> & replace_names)1099 bool get_schematic(lua_State *L, int index, Schematic *schem,
1100 INodeDefManager *ndef, std::map<std::string, std::string> &replace_names)
1101 {
1102 if (index < 0)
1103 index = lua_gettop(L) + 1 + index;
1104
1105 if (lua_istable(L, index)) {
1106 return read_schematic(L, index, schem, ndef, replace_names);
1107 } else if (lua_isstring(L, index)) {
1108 NodeResolver *resolver = ndef->getResolver();
1109 const char *filename = lua_tostring(L, index);
1110 return schem->loadSchematicFromFile(filename, resolver, replace_names);
1111 } else {
1112 return false;
1113 }
1114 }
1115
read_schematic(lua_State * L,int index,Schematic * schem,INodeDefManager * ndef,std::map<std::string,std::string> & replace_names)1116 bool read_schematic(lua_State *L, int index, Schematic *schem,
1117 INodeDefManager *ndef, std::map<std::string, std::string> &replace_names)
1118 {
1119 //// Get schematic size
1120 lua_getfield(L, index, "size");
1121 v3s16 size = read_v3s16(L, -1);
1122 lua_pop(L, 1);
1123
1124 //// Get schematic data
1125 lua_getfield(L, index, "data");
1126 luaL_checktype(L, -1, LUA_TTABLE);
1127
1128 int numnodes = size.X * size.Y * size.Z;
1129 MapNode *schemdata = new MapNode[numnodes];
1130 int i = 0;
1131
1132 lua_pushnil(L);
1133 while (lua_next(L, -2)) {
1134 if (i < numnodes) {
1135 // same as readnode, except param1 default is MTSCHEM_PROB_CONST
1136 lua_getfield(L, -1, "name");
1137 std::string name = luaL_checkstring(L, -1);
1138 lua_pop(L, 1);
1139
1140 u8 param1;
1141 lua_getfield(L, -1, "param1");
1142 param1 = !lua_isnil(L, -1) ? lua_tonumber(L, -1) : MTSCHEM_PROB_ALWAYS;
1143 lua_pop(L, 1);
1144
1145 u8 param2;
1146 lua_getfield(L, -1, "param2");
1147 param2 = !lua_isnil(L, -1) ? lua_tonumber(L, -1) : 0;
1148 lua_pop(L, 1);
1149
1150 std::map<std::string, std::string>::iterator it;
1151 it = replace_names.find(name);
1152 if (it != replace_names.end())
1153 name = it->second;
1154
1155 schemdata[i] = MapNode(ndef, name, param1, param2);
1156 }
1157
1158 i++;
1159 lua_pop(L, 1);
1160 }
1161
1162 if (i != numnodes) {
1163 errorstream << "read_schematic: incorrect number of "
1164 "nodes provided in raw schematic data (got " << i <<
1165 ", expected " << numnodes << ")." << std::endl;
1166 return false;
1167 }
1168
1169 //// Get Y-slice probability values (if present)
1170 u8 *slice_probs = new u8[size.Y];
1171 for (i = 0; i != size.Y; i++)
1172 slice_probs[i] = MTSCHEM_PROB_ALWAYS;
1173
1174 lua_getfield(L, index, "yslice_prob");
1175 if (lua_istable(L, -1)) {
1176 lua_pushnil(L);
1177 while (lua_next(L, -2)) {
1178 if (getintfield(L, -1, "ypos", i) && i >= 0 && i < size.Y) {
1179 slice_probs[i] = getintfield_default(L, -1,
1180 "prob", MTSCHEM_PROB_ALWAYS);
1181 }
1182 lua_pop(L, 1);
1183 }
1184 }
1185
1186 schem->flags = 0;
1187 schem->size = size;
1188 schem->schemdata = schemdata;
1189 schem->slice_probs = slice_probs;
1190 return true;
1191 }
1192
1193 /******************************************************************************/
1194 // Returns depth of json value tree
push_json_value_getdepth(const Json::Value & value)1195 static int push_json_value_getdepth(const Json::Value &value)
1196 {
1197 if (!value.isArray() && !value.isObject())
1198 return 1;
1199
1200 int maxdepth = 0;
1201 for (Json::Value::const_iterator it = value.begin();
1202 it != value.end(); ++it) {
1203 int elemdepth = push_json_value_getdepth(*it);
1204 if (elemdepth > maxdepth)
1205 maxdepth = elemdepth;
1206 }
1207 return maxdepth + 1;
1208 }
1209 // Recursive function to convert JSON --> Lua table
push_json_value_helper(lua_State * L,const Json::Value & value,int nullindex)1210 static bool push_json_value_helper(lua_State *L, const Json::Value &value,
1211 int nullindex)
1212 {
1213 switch(value.type()) {
1214 case Json::nullValue:
1215 default:
1216 lua_pushvalue(L, nullindex);
1217 break;
1218 case Json::intValue:
1219 lua_pushinteger(L, value.asInt());
1220 break;
1221 case Json::uintValue:
1222 lua_pushinteger(L, value.asUInt());
1223 break;
1224 case Json::realValue:
1225 lua_pushnumber(L, value.asDouble());
1226 break;
1227 case Json::stringValue:
1228 {
1229 const char *str = value.asCString();
1230 lua_pushstring(L, str ? str : "");
1231 }
1232 break;
1233 case Json::booleanValue:
1234 lua_pushboolean(L, value.asInt());
1235 break;
1236 case Json::arrayValue:
1237 lua_newtable(L);
1238 for (Json::Value::const_iterator it = value.begin();
1239 it != value.end(); ++it) {
1240 push_json_value_helper(L, *it, nullindex);
1241 lua_rawseti(L, -2, it.index() + 1);
1242 }
1243 break;
1244 case Json::objectValue:
1245 lua_newtable(L);
1246 for (Json::Value::const_iterator it = value.begin();
1247 it != value.end(); ++it) {
1248 const char *str = it.memberName();
1249 lua_pushstring(L, str ? str : "");
1250 push_json_value_helper(L, *it, nullindex);
1251 lua_rawset(L, -3);
1252 }
1253 break;
1254 }
1255 return true;
1256 }
1257 // converts JSON --> Lua table; returns false if lua stack limit exceeded
1258 // nullindex: Lua stack index of value to use in place of JSON null
push_json_value(lua_State * L,const Json::Value & value,int nullindex)1259 bool push_json_value(lua_State *L, const Json::Value &value, int nullindex)
1260 {
1261 if(nullindex < 0)
1262 nullindex = lua_gettop(L) + 1 + nullindex;
1263
1264 int depth = push_json_value_getdepth(value);
1265
1266 // The maximum number of Lua stack slots used at each recursion level
1267 // of push_json_value_helper is 2, so make sure there a depth * 2 slots
1268 if (lua_checkstack(L, depth * 2))
1269 return push_json_value_helper(L, value, nullindex);
1270 else
1271 return false;
1272 }
1273
1274 // Converts Lua table --> JSON
read_json_value(lua_State * L,Json::Value & root,int index,u8 recursion)1275 void read_json_value(lua_State *L, Json::Value &root, int index, u8 recursion)
1276 {
1277 if (recursion > 16) {
1278 throw SerializationError("Maximum recursion depth exceeded");
1279 }
1280 int type = lua_type(L, index);
1281 if (type == LUA_TBOOLEAN) {
1282 root = (bool) lua_toboolean(L, index);
1283 } else if (type == LUA_TNUMBER) {
1284 root = lua_tonumber(L, index);
1285 } else if (type == LUA_TSTRING) {
1286 size_t len;
1287 const char *str = lua_tolstring(L, index, &len);
1288 root = std::string(str, len);
1289 } else if (type == LUA_TTABLE) {
1290 lua_pushnil(L);
1291 while (lua_next(L, index)) {
1292 // Key is at -2 and value is at -1
1293 Json::Value value;
1294 read_json_value(L, value, lua_gettop(L), recursion + 1);
1295
1296 Json::ValueType roottype = root.type();
1297 int keytype = lua_type(L, -1);
1298 if (keytype == LUA_TNUMBER) {
1299 lua_Number key = lua_tonumber(L, -1);
1300 if (roottype != Json::nullValue && roottype != Json::arrayValue) {
1301 throw SerializationError("Can't mix array and object values in JSON");
1302 } else if (key < 1) {
1303 throw SerializationError("Can't use zero-based or negative indexes in JSON");
1304 } else if (floor(key) != key) {
1305 throw SerializationError("Can't use indexes with a fractional part in JSON");
1306 }
1307 root[(Json::ArrayIndex) key - 1] = value;
1308 } else if (keytype == LUA_TSTRING) {
1309 if (roottype != Json::nullValue && roottype != Json::objectValue) {
1310 throw SerializationError("Can't mix array and object values in JSON");
1311 }
1312 root[lua_tostring(L, -1)] = value;
1313 } else {
1314 throw SerializationError("Lua key to convert to JSON is not a string or number");
1315 }
1316 }
1317 } else if (type == LUA_TNIL) {
1318 root = Json::nullValue;
1319 } else {
1320 throw SerializationError("Can only store booleans, numbers, strings, objects, arrays, and null in JSON");
1321 }
1322 lua_pop(L, 1); // Pop value
1323 }
1324
1325