Expose SGCondition as a ghost to Nasal directly.

[flightgear.git] / src / Scripting / nasal-props.cxx

diff --git a/src/Scripting/nasal-props.cxx b/src/Scripting/nasal-props.cxx
index 4ffc4d6016a4536298d2c8fec2ee86848280d354..1df4b0d42b93741296eb0229dafb18166b102d1a 100644 (file)
--- a/src/Scripting/nasal-props.cxx
+++ b/src/Scripting/nasal-props.cxx
@@ -3,13 +3,18 @@
 #  include "config.h"
 #endif
 
+#include <cstring>
+
 #include <simgear/nasal/nasal.h>
 #include <simgear/props/props.hxx>
+#include <simgear/props/vectorPropTemplates.hxx>
 
 #include <Main/globals.hxx>
 
 #include "NasalSys.hxx"
 
+using namespace std;
+
 // Implementation of a Nasal wrapper for the SGPropertyNode class,
 // using the Nasal "ghost" (er... Garbage collection Handle for
 // OutSide Thingy) facility.
@@ -40,6 +45,15 @@ naRef FGNasalSys::propNodeGhost(SGPropertyNode* handle)
     return propNodeGhostCreate(_context, handle);
 }
 
+SGPropertyNode* ghostToPropNode(naRef ref)
+{
+  if (!naIsGhost(ref) || (naGhost_type(ref) != &PropNodeGhostType))
+    return NULL;
+  
+  SGPropertyNode_ptr* pp = (SGPropertyNode_ptr*) naGhost_ptr(ref);
+  return pp->ptr();
+}
+
 #define NASTR(s) s ? naStr_fromdata(naNewString(c),(char*)(s),strlen(s)) : naNil()
 
 //
@@ -49,17 +63,20 @@ naRef FGNasalSys::propNodeGhost(SGPropertyNode* handle)
 // array.  This allows the Nasal handlers to do things like:
 //   Node.getChild = func { _getChild(me.ghost, arg) }
 //
-#define NODEARG()                                                       \
+#define NODENOARG()                                                       \
     if(argc < 2 || !naIsGhost(args[0]) ||                               \
        naGhost_type(args[0]) != &PropNodeGhostType)                       \
         naRuntimeError(c, "bad argument to props function");            \
-    SGPropertyNode_ptr* node = (SGPropertyNode_ptr*)naGhost_ptr(args[0]); \
+    SGPropertyNode_ptr* node = (SGPropertyNode_ptr*)naGhost_ptr(args[0]);
+
+#define NODEARG()                                                       \
+    NODENOARG();                                                       \
     naRef argv = args[1]
 
 static naRef f_getType(naContext c, naRef me, int argc, naRef* args)
 {
     using namespace simgear;
-    NODEARG();
+    NODENOARG();
     const char* t = "unknown";
     switch((*node)->getType()) {
     case props::NONE:   t = "NONE";   break;
@@ -98,6 +115,7 @@ static naRef f_getAttribute(naContext c, naRef me, int argc, naRef* args)
     else if(!strcmp(a, "trace-read"))  attr = SGPropertyNode::TRACE_READ;
     else if(!strcmp(a, "trace-write")) attr = SGPropertyNode::TRACE_WRITE;
     else if(!strcmp(a, "userarchive")) attr = SGPropertyNode::USERARCHIVE;
+    else if(!strcmp(a, "preserve"))    attr = SGPropertyNode::PRESERVE;
     else {
         naRuntimeError(c, "props.getAttribute() with invalid attribute");
         return naNil();
@@ -123,6 +141,7 @@ static naRef f_setAttribute(naContext c, naRef me, int argc, naRef* args)
     else if(!strcmp(a, "trace-read"))  attr = SGPropertyNode::TRACE_READ;
     else if(!strcmp(a, "trace-write")) attr = SGPropertyNode::TRACE_WRITE;
     else if(!strcmp(a, "userarchive")) attr = SGPropertyNode::USERARCHIVE;
+    else if(!strcmp(a, "preserve"))    attr = SGPropertyNode::PRESERVE;
     else {
         naRuntimeError(c, "props.setAttribute() with invalid attribute");
         return naNil();
@@ -134,13 +153,13 @@ static naRef f_setAttribute(naContext c, naRef me, int argc, naRef* args)
 
 static naRef f_getName(naContext c, naRef me, int argc, naRef* args)
 {
-    NODEARG();
+    NODENOARG();
     return NASTR((*node)->getName());
 }
 
 static naRef f_getIndex(naContext c, naRef me, int argc, naRef* args)
 {
-    NODEARG();
+    NODENOARG();
     return naNum((*node)->getIndex());
 }
 
@@ -150,7 +169,7 @@ naRef makeVectorFromVec(naContext c, const T& vec)
     const int num_components
         = sizeof(vec.data()) / sizeof(typename T::value_type);
     naRef vector = naNewVector(c);
-    naVec_setsize(vector, num_components);
+    naVec_setsize(c, vector, num_components);
     for (int i = 0; i < num_components; ++i)
         naVec_set(vector, i, naNum(vec[i]));
     return vector;
@@ -159,12 +178,21 @@ naRef makeVectorFromVec(naContext c, const T& vec)
 static naRef f_getValue(naContext c, naRef me, int argc, naRef* args)
 {
     using namespace simgear;
-    NODEARG();
+    NODENOARG();
     switch((*node)->getType()) {
     case props::BOOL:   case props::INT:
     case props::LONG:   case props::FLOAT:
     case props::DOUBLE:
-        return naNum((*node)->getDoubleValue());
+    {
+        double dv = (*node)->getDoubleValue();
+        if (osg::isNaN(dv)) {
+          SG_LOG(SG_NASAL, SG_ALERT, "Nasal getValue: property " << (*node)->getPath() << " is NaN");
+          return naNil();
+        }
+
+        return naNum(dv);
+    }
+
     case props::STRING:
     case props::UNSPECIFIED:
         return NASTR((*node)->getStringValue());
@@ -212,7 +240,13 @@ static naRef f_setValue(naContext c, naRef me, int argc, naRef* args)
         naRef n = naNumValue(val);
         if(naIsNil(n))
             naRuntimeError(c, "props.setValue() with non-number");
-        result = (*node)->setDoubleValue(naNumValue(val).num);
+
+        double d = naNumValue(val).num;
+        if (osg::isNaN(d)) {
+          naRuntimeError(c, "props.setValue() passed a NaN");
+        }
+
+        result = (*node)->setDoubleValue(d);
     }
     return naNum(result);
 }
@@ -245,14 +279,19 @@ static naRef f_setDoubleValue(naContext c, naRef me, int argc, naRef* args)
 {
     NODEARG();
     naRef r = naNumValue(naVec_get(argv, 0));
-    if(naIsNil(r))
+    if (naIsNil(r))
         naRuntimeError(c, "props.setDoubleValue() with non-number");
+
+    if (osg::isNaN(r.num)) {
+      naRuntimeError(c, "props.setDoubleValue() passed a NaN");
+    }
+
     return naNum((*node)->setDoubleValue(r.num));
 }
 
 static naRef f_getParent(naContext c, naRef me, int argc, naRef* args)
 {
-    NODEARG();
+    NODENOARG();
     SGPropertyNode* n = (*node)->getParent();
     if(!n) return naNil();
     return propNodeGhostCreate(c, n);
@@ -363,13 +402,13 @@ static naRef f_alias(naContext c, naRef me, int argc, naRef* args)
 
 static naRef f_unalias(naContext c, naRef me, int argc, naRef* args)
 {
-    NODEARG();
+    NODENOARG();
     return naNum((*node)->unalias());
 }
 
 static naRef f_getAliasTarget(naContext c, naRef me, int argc, naRef* args)
 {
-    NODEARG();
+    NODENOARG();
     return propNodeGhostCreate(c, (*node)->getAliasTarget());
 }