8 #include <simgear/math/SGMath.hxx>
9 #include <simgear/nasal/nasal.h>
10 #include <simgear/props/props.hxx>
11 #include <simgear/props/vectorPropTemplates.hxx>
13 #include <Main/globals.hxx>
15 #include "NasalSys.hxx"
19 // Implementation of a Nasal wrapper for the SGPropertyNode class,
20 // using the Nasal "ghost" (er... Garbage collection Handle for
21 // OutSide Thingy) facility.
23 // Note that these functions appear in Nasal with prepended
24 // underscores. They work on the low-level "ghost" objects and aren't
25 // intended for use from user code, but from Nasal code you will find
26 // in props.nas. That is where the Nasal props.Node class is defined,
27 // which provides a saner interface along the lines of SGPropertyNode.
29 static void propNodeGhostDestroy(void* ghost)
31 SGPropertyNode_ptr* prop = (SGPropertyNode_ptr*)ghost;
35 naGhostType PropNodeGhostType = { propNodeGhostDestroy, "prop" };
37 static naRef propNodeGhostCreate(naContext c, SGPropertyNode* n)
39 if(!n) return naNil();
40 SGPropertyNode_ptr* ghost = new SGPropertyNode_ptr(n);
41 return naNewGhost(c, &PropNodeGhostType, ghost);
44 naRef FGNasalSys::propNodeGhost(SGPropertyNode* handle)
46 return propNodeGhostCreate(_context, handle);
49 #define NASTR(s) s ? naStr_fromdata(naNewString(c),(char*)(s),strlen(s)) : naNil()
52 // Standard header for the extension functions. It turns the "ghost"
53 // found in arg[0] into a SGPropertyNode_ptr*, and then "unwraps" the
54 // vector found in the second argument into a normal-looking args
55 // array. This allows the Nasal handlers to do things like:
56 // Node.getChild = func { _getChild(me.ghost, arg) }
59 if(argc < 2 || !naIsGhost(args[0]) || \
60 naGhost_type(args[0]) != &PropNodeGhostType) \
61 naRuntimeError(c, "bad argument to props function"); \
62 SGPropertyNode_ptr* node = (SGPropertyNode_ptr*)naGhost_ptr(args[0]); \
65 static naRef f_getType(naContext c, naRef me, int argc, naRef* args)
67 using namespace simgear;
69 const char* t = "unknown";
70 switch((*node)->getType()) {
71 case props::NONE: t = "NONE"; break;
72 case props::ALIAS: t = "ALIAS"; break;
73 case props::BOOL: t = "BOOL"; break;
74 case props::INT: t = "INT"; break;
75 case props::LONG: t = "LONG"; break;
76 case props::FLOAT: t = "FLOAT"; break;
77 case props::DOUBLE: t = "DOUBLE"; break;
78 case props::STRING: t = "STRING"; break;
79 case props::UNSPECIFIED: t = "UNSPECIFIED"; break;
80 case props::VEC3D: t = "VEC3D"; break;
81 case props::VEC4D: t = "VEC4D"; break;
82 case props::EXTENDED: t = "EXTENDED"; break; // shouldn't happen
87 static naRef f_getAttribute(naContext c, naRef me, int argc, naRef* args)
90 if(naVec_size(argv) == 0) return naNum(unsigned((*node)->getAttributes()));
91 naRef val = naVec_get(argv, 0);
92 const char *a = naStr_data(val);
93 SGPropertyNode::Attribute attr;
95 if(!strcmp(a, "last")) return naNum(SGPropertyNode::LAST_USED_ATTRIBUTE);
96 else if(!strcmp(a, "children")) return naNum((*node)->nChildren());
97 else if(!strcmp(a, "listeners")) return naNum((*node)->nListeners());
98 else if(!strcmp(a, "references")) return naNum(node->getNumRefs());
99 else if(!strcmp(a, "tied")) return naNum((*node)->isTied());
100 else if(!strcmp(a, "alias")) return naNum((*node)->isAlias());
101 else if(!strcmp(a, "readable")) attr = SGPropertyNode::READ;
102 else if(!strcmp(a, "writable")) attr = SGPropertyNode::WRITE;
103 else if(!strcmp(a, "archive")) attr = SGPropertyNode::ARCHIVE;
104 else if(!strcmp(a, "trace-read")) attr = SGPropertyNode::TRACE_READ;
105 else if(!strcmp(a, "trace-write")) attr = SGPropertyNode::TRACE_WRITE;
106 else if(!strcmp(a, "userarchive")) attr = SGPropertyNode::USERARCHIVE;
107 else if(!strcmp(a, "preserve")) attr = SGPropertyNode::PRESERVE;
109 naRuntimeError(c, "props.getAttribute() with invalid attribute");
112 return naNum((*node)->getAttribute(attr));
115 static naRef f_setAttribute(naContext c, naRef me, int argc, naRef* args)
118 naRef val = naVec_get(argv, 0);
119 if(naVec_size(argv) == 1 && naIsNum(val)) {
120 naRef ret = naNum((*node)->getAttributes());
121 (*node)->setAttributes((int)val.num);
124 SGPropertyNode::Attribute attr;
125 const char *a = naStr_data(val);
127 if(!strcmp(a, "readable")) attr = SGPropertyNode::READ;
128 else if(!strcmp(a, "writable")) attr = SGPropertyNode::WRITE;
129 else if(!strcmp(a, "archive")) attr = SGPropertyNode::ARCHIVE;
130 else if(!strcmp(a, "trace-read")) attr = SGPropertyNode::TRACE_READ;
131 else if(!strcmp(a, "trace-write")) attr = SGPropertyNode::TRACE_WRITE;
132 else if(!strcmp(a, "userarchive")) attr = SGPropertyNode::USERARCHIVE;
133 else if(!strcmp(a, "preserve")) attr = SGPropertyNode::PRESERVE;
135 naRuntimeError(c, "props.setAttribute() with invalid attribute");
138 naRef ret = naNum((*node)->getAttribute(attr));
139 (*node)->setAttribute(attr, naTrue(naVec_get(argv, 1)) ? true : false);
143 static naRef f_getName(naContext c, naRef me, int argc, naRef* args)
146 return NASTR((*node)->getName());
149 static naRef f_getIndex(naContext c, naRef me, int argc, naRef* args)
152 return naNum((*node)->getIndex());
156 naRef makeVectorFromVec(naContext c, const T& vec)
158 const int num_components
159 = sizeof(vec.data()) / sizeof(typename T::value_type);
160 naRef vector = naNewVector(c);
161 naVec_setsize(c, vector, num_components);
162 for (int i = 0; i < num_components; ++i)
163 naVec_set(vector, i, naNum(vec[i]));
167 static naRef f_getValue(naContext c, naRef me, int argc, naRef* args)
169 using namespace simgear;
171 switch((*node)->getType()) {
172 case props::BOOL: case props::INT:
173 case props::LONG: case props::FLOAT:
176 double dv = (*node)->getDoubleValue();
177 if (osg::isNaN(dv)) {
178 SG_LOG(SG_NASAL, SG_ALERT, "Nasal getValue: property " << (*node)->getPath() << " is NaN");
186 case props::UNSPECIFIED:
187 return NASTR((*node)->getStringValue());
189 return makeVectorFromVec(c, (*node)->getValue<SGVec3d>());
191 return makeVectorFromVec(c, (*node)->getValue<SGVec4d>());
198 T makeVecFromVector(naRef vector)
201 const int num_components
202 = sizeof(vec.data()) / sizeof(typename T::value_type);
203 int size = naVec_size(vector);
205 for (int i = 0; i < num_components && i < size; ++i) {
206 naRef element = naVec_get(vector, i);
207 naRef n = naNumValue(element);
214 static naRef f_setValue(naContext c, naRef me, int argc, naRef* args)
217 naRef val = naVec_get(argv, 0);
219 if(naIsString(val)) {
220 result = (*node)->setStringValue(naStr_data(val));
221 } else if(naIsVector(val)) {
222 if(naVec_size(val) == 3)
223 result = (*node)->setValue(makeVecFromVector<SGVec3d>(val));
224 else if(naVec_size(val) == 4)
225 result = (*node)->setValue(makeVecFromVector<SGVec4d>(val));
227 naRuntimeError(c, "props.setValue() vector value has wrong size");
229 naRef n = naNumValue(val);
231 naRuntimeError(c, "props.setValue() with non-number");
233 double d = naNumValue(val).num;
235 naRuntimeError(c, "props.setValue() passed a NaN");
238 result = (*node)->setDoubleValue(d);
240 return naNum(result);
243 static naRef f_setIntValue(naContext c, naRef me, int argc, naRef* args)
247 // int iv = (int)naNumValue(naVec_get(argv, 0)).num;
249 // Junk to pacify the gcc-2.95.3 optimizer:
250 naRef tmp0 = naVec_get(argv, 0);
251 naRef tmp1 = naNumValue(tmp0);
253 naRuntimeError(c, "props.setIntValue() with non-number");
254 double tmp2 = tmp1.num;
257 return naNum((*node)->setIntValue(iv));
260 static naRef f_setBoolValue(naContext c, naRef me, int argc, naRef* args)
263 naRef val = naVec_get(argv, 0);
264 return naNum((*node)->setBoolValue(naTrue(val) ? true : false));
267 static naRef f_setDoubleValue(naContext c, naRef me, int argc, naRef* args)
270 naRef r = naNumValue(naVec_get(argv, 0));
272 naRuntimeError(c, "props.setDoubleValue() with non-number");
274 if (osg::isNaN(r.num)) {
275 naRuntimeError(c, "props.setDoubleValue() passed a NaN");
278 return naNum((*node)->setDoubleValue(r.num));
281 static naRef f_getParent(naContext c, naRef me, int argc, naRef* args)
284 SGPropertyNode* n = (*node)->getParent();
285 if(!n) return naNil();
286 return propNodeGhostCreate(c, n);
289 static naRef f_getChild(naContext c, naRef me, int argc, naRef* args)
292 naRef child = naVec_get(argv, 0);
293 if(!naIsString(child)) return naNil();
294 naRef idx = naNumValue(naVec_get(argv, 1));
295 bool create = naTrue(naVec_get(argv, 2));
298 if(naIsNil(idx) || !naIsNum(idx)) {
299 n = (*node)->getChild(naStr_data(child), create);
301 n = (*node)->getChild(naStr_data(child), (int)idx.num, create);
303 } catch (const string& err) {
304 naRuntimeError(c, (char *)err.c_str());
307 if(!n) return naNil();
308 return propNodeGhostCreate(c, n);
311 static naRef f_getChildren(naContext c, naRef me, int argc, naRef* args)
314 naRef result = naNewVector(c);
315 if(naIsNil(argv) || naVec_size(argv) == 0) {
317 for(int i=0; i<(*node)->nChildren(); i++)
318 naVec_append(result, propNodeGhostCreate(c, (*node)->getChild(i)));
320 // Get all children of a specified name
321 naRef name = naVec_get(argv, 0);
322 if(!naIsString(name)) return naNil();
324 vector<SGPropertyNode_ptr> children
325 = (*node)->getChildren(naStr_data(name));
326 for(unsigned int i=0; i<children.size(); i++)
327 naVec_append(result, propNodeGhostCreate(c, children[i]));
328 } catch (const string& err) {
329 naRuntimeError(c, (char *)err.c_str());
336 static naRef f_removeChild(naContext c, naRef me, int argc, naRef* args)
339 naRef child = naVec_get(argv, 0);
340 naRef index = naVec_get(argv, 1);
341 if(!naIsString(child) || !naIsNum(index)) return naNil();
342 SGPropertyNode_ptr n = 0;
344 n = (*node)->removeChild(naStr_data(child), (int)index.num, false);
345 } catch (const string& err) {
346 naRuntimeError(c, (char *)err.c_str());
348 return propNodeGhostCreate(c, n);
351 static naRef f_removeChildren(naContext c, naRef me, int argc, naRef* args)
354 naRef result = naNewVector(c);
355 if(naIsNil(argv) || naVec_size(argv) == 0) {
356 // Remove all children
357 for(int i = (*node)->nChildren() - 1; i >=0; i--)
358 naVec_append(result, propNodeGhostCreate(c, (*node)->removeChild(i)));
360 // Remove all children of a specified name
361 naRef name = naVec_get(argv, 0);
362 if(!naIsString(name)) return naNil();
364 vector<SGPropertyNode_ptr> children
365 = (*node)->removeChildren(naStr_data(name), false);
366 for(unsigned int i=0; i<children.size(); i++)
367 naVec_append(result, propNodeGhostCreate(c, children[i]));
368 } catch (const string& err) {
369 naRuntimeError(c, (char *)err.c_str());
376 static naRef f_alias(naContext c, naRef me, int argc, naRef* args)
380 naRef prop = naVec_get(argv, 0);
382 if(naIsString(prop)) al = globals->get_props()->getNode(naStr_data(prop), true);
383 else if(naIsGhost(prop)) al = *(SGPropertyNode_ptr*)naGhost_ptr(prop);
384 else throw string("props.alias() with bad argument");
385 } catch (const string& err) {
386 naRuntimeError(c, (char *)err.c_str());
389 return naNum((*node)->alias(al));
392 static naRef f_unalias(naContext c, naRef me, int argc, naRef* args)
395 return naNum((*node)->unalias());
398 static naRef f_getAliasTarget(naContext c, naRef me, int argc, naRef* args)
401 return propNodeGhostCreate(c, (*node)->getAliasTarget());
404 static naRef f_getNode(naContext c, naRef me, int argc, naRef* args)
407 naRef path = naVec_get(argv, 0);
408 bool create = naTrue(naVec_get(argv, 1));
409 if(!naIsString(path)) return naNil();
412 n = (*node)->getNode(naStr_data(path), create);
413 } catch (const string& err) {
414 naRuntimeError(c, (char *)err.c_str());
417 return propNodeGhostCreate(c, n);
420 static naRef f_new(naContext c, naRef me, int argc, naRef* args)
422 return propNodeGhostCreate(c, new SGPropertyNode());
425 static naRef f_globals(naContext c, naRef me, int argc, naRef* args)
427 return propNodeGhostCreate(c, globals->get_props());
434 { f_getType, "_getType" },
435 { f_getAttribute, "_getAttribute" },
436 { f_setAttribute, "_setAttribute" },
437 { f_getName, "_getName" },
438 { f_getIndex, "_getIndex" },
439 { f_getValue, "_getValue" },
440 { f_setValue, "_setValue" },
441 { f_setIntValue, "_setIntValue" },
442 { f_setBoolValue, "_setBoolValue" },
443 { f_setDoubleValue, "_setDoubleValue" },
444 { f_getParent, "_getParent" },
445 { f_getChild, "_getChild" },
446 { f_getChildren, "_getChildren" },
447 { f_removeChild, "_removeChild" },
448 { f_removeChildren, "_removeChildren" },
449 { f_alias, "_alias" },
450 { f_unalias, "_unalias" },
451 { f_getAliasTarget, "_getAliasTarget" },
452 { f_getNode, "_getNode" },
454 { f_globals, "_globals" },
458 naRef FGNasalSys::genPropsModule()
460 naRef namespc = naNewHash(_context);
461 for(int i=0; propfuncs[i].name; i++)
462 hashset(namespc, propfuncs[i].name,
463 naNewFunc(_context, naNewCCode(_context, propfuncs[i].func)));