# include "config.h"
#endif
+#ifdef HAVE_SYS_TIME_H
+# include <sys/time.h> // gettimeofday
+#endif
+
#include <string.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
+#include <fstream>
+#include <sstream>
#include <plib/ul.h>
#include <simgear/math/sg_random.h>
#include <simgear/misc/sg_path.hxx>
#include <simgear/misc/interpolator.hxx>
+#include <simgear/scene/material/mat.hxx>
#include <simgear/structure/commands.hxx>
+#include <simgear/math/sg_geodesy.hxx>
+#include <simgear/structure/event_mgr.hxx>
+#include <Airports/runways.hxx>
+#include <Airports/simple.hxx>
#include <Main/globals.hxx>
#include <Main/fg_props.hxx>
+#include <Main/util.hxx>
+#include <Scenery/scenery.hxx>
#include "NasalSys.hxx"
+static FGNasalSys* nasalSys = 0;
+
+
// Read and return file contents in a single buffer. Note use of
// stat() to get the file size. This is a win32 function, believe it
// or not. :) Note the REALLY IMPORTANT use of the "b" flag to fopen.
FGNasalSys::FGNasalSys()
{
+ nasalSys = this;
_context = 0;
_globals = naNil();
_gcHash = naNil();
// drop the lock in every extension function that might call back into
// Nasal, we keep a stack depth counter here and only unlock/lock
// around the naCall if it isn't the first one.
-naRef FGNasalSys::call(naRef code, naRef locals)
+naRef FGNasalSys::call(naRef code, int argc, naRef* args, naRef locals)
{
naContext ctx = naNewContext();
if(_callCount) naModUnlock();
_callCount++;
- naRef result = naCall(ctx, code, 0, 0, naNil(), locals);
+ naRef result = naCall(ctx, code, argc, args, naNil(), locals);
if(naGetError(ctx))
logError(ctx);
_callCount--;
FGNasalSys::~FGNasalSys()
{
+ nasalSys = 0;
map<int, FGNasalListener *>::iterator it, end = _listener.end();
- for (it = _listener.begin(); it != end; ++it)
+ for(it = _listener.begin(); it != end; ++it)
delete it->second;
- // Nasal doesn't have a "destroy context" API yet. :(
- // Not a problem for a global subsystem that will never be
- // destroyed. And the context is actually a global, so no memory
- // is technically leaked (although the GC pool memory obviously
- // won't be freed).
- _context = 0;
+ naFreeContext(_context);
_globals = naNil();
}
strlen(sourceCode));
if(naIsNil(code))
return false;
- call(code, naNil());
+ call(code, 0, 0, naNil());
return true;
}
char buf[256];
if(!name) {
- sprintf(buf, "FGNasalScript@%p", script);
+ sprintf(buf, "FGNasalScript@%p", (void *)script);
name = buf;
}
// nil if it doesn't exist.
static naRef f_getprop(naContext c, naRef me, int argc, naRef* args)
{
+ using namespace simgear;
const SGPropertyNode* p = findnode(c, args, argc);
if(!p) return naNil();
switch(p->getType()) {
- case SGPropertyNode::BOOL: case SGPropertyNode::INT:
- case SGPropertyNode::LONG: case SGPropertyNode::FLOAT:
- case SGPropertyNode::DOUBLE:
+ case props::BOOL: case props::INT:
+ case props::LONG: case props::FLOAT:
+ case props::DOUBLE:
return naNum(p->getDoubleValue());
- case SGPropertyNode::STRING:
- case SGPropertyNode::UNSPECIFIED:
+ case props::STRING:
+ case props::UNSPECIFIED:
{
naRef nastr = naNewString(c);
const char* val = p->getStringValue();
naStr_fromdata(nastr, (char*)val, strlen(val));
return nastr;
}
- case SGPropertyNode::ALIAS: // <--- FIXME, recurse?
+ case props::ALIAS: // <--- FIXME, recurse?
default:
return naNil();
}
SGPropertyNode* props = globals->get_props();
naRef val = args[argc-1];
+ bool result = false;
try {
- if(naIsString(val)) props->setStringValue(buf, naStr_data(val));
+ if(naIsString(val)) result = props->setStringValue(buf, naStr_data(val));
else {
naRef n = naNumValue(val);
if(naIsNil(n))
naRuntimeError(c, "setprop() value is not string or number");
- props->setDoubleValue(buf, n.num);
+ result = props->setDoubleValue(buf, n.num);
}
} catch (const string& err) {
naRuntimeError(c, (char *)err.c_str());
}
- return naNil();
+ return naNum(result);
#undef BUFLEN
}
// make sure it appears. Is there better way to do this?
static naRef f_print(naContext c, naRef me, int argc, naRef* args)
{
-#define BUFLEN 1024
- char buf[BUFLEN + 1];
- buf[BUFLEN] = 0; // extra nul to handle strncpy brain damage
- buf[0] = 0; // Zero-length in case there are no arguments
- char* p = buf;
- int buflen = BUFLEN;
+ string buf;
int n = argc;
for(int i=0; i<n; i++) {
naRef s = naStringValue(c, args[i]);
if(naIsNil(s)) continue;
- strncpy(p, naStr_data(s), buflen);
- p += naStr_len(s);
- buflen = BUFLEN - (p - buf);
- if(buflen <= 0) break;
+ buf += naStr_data(s);
}
SG_LOG(SG_GENERAL, SG_ALERT, buf);
- return naNil();
-#undef BUFLEN
+ return naNum(buf.length());
}
// fgcommand() extension function. Executes a named command via the
// an argument.
static naRef f_fgcommand(naContext c, naRef me, int argc, naRef* args)
{
- if(argc < 2 || !naIsString(args[0]) || !naIsGhost(args[1]))
+ naRef cmd = argc > 0 ? args[0] : naNil();
+ naRef props = argc > 1 ? args[1] : naNil();
+ if(!naIsString(cmd) || (!naIsNil(props) && !naIsGhost(props)))
naRuntimeError(c, "bad arguments to fgcommand()");
- naRef cmd = args[0], props = args[1];
- SGPropertyNode_ptr* node = (SGPropertyNode_ptr*)naGhost_ptr(props);
+ SGPropertyNode_ptr tmp, *node;
+ if(!naIsNil(props))
+ node = (SGPropertyNode_ptr*)naGhost_ptr(props);
+ else {
+ tmp = new SGPropertyNode();
+ node = &tmp;
+ }
return naNum(globals->get_commands()->execute(naStr_data(cmd), *node));
}
// FGNasalSys::setTimer(). See there for docs.
static naRef f_settimer(naContext c, naRef me, int argc, naRef* args)
{
- FGNasalSys* nasal = (FGNasalSys*)globals->get_subsystem("nasal");
- nasal->setTimer(argc, args);
+ nasalSys->setTimer(c, argc, args);
return naNil();
}
// FGNasalSys::setListener(). See there for docs.
static naRef f_setlistener(naContext c, naRef me, int argc, naRef* args)
{
- FGNasalSys* nasal = (FGNasalSys*)globals->get_subsystem("nasal");
- return nasal->setListener(argc, args);
+ return nasalSys->setListener(c, argc, args);
}
// removelistener(int) extension function. Falls through to
// FGNasalSys::removeListener(). See there for docs.
static naRef f_removelistener(naContext c, naRef me, int argc, naRef* args)
{
- FGNasalSys* nasal = (FGNasalSys*)globals->get_subsystem("nasal");
- return nasal->removeListener(argc, args);
+ return nasalSys->removeListener(c, argc, args);
}
// Returns a ghost handle to the argument to the currently executing
// command
static naRef f_cmdarg(naContext c, naRef me, int argc, naRef* args)
{
- FGNasalSys* nasal = (FGNasalSys*)globals->get_subsystem("nasal");
- return nasal->cmdArgGhost();
+ return nasalSys->cmdArgGhost();
}
// Sets up a property interpolation. The first argument is either a
deltas[i] = naNumValue(naVec_get(curve, 2*i+1)).num;
}
- ((SGInterpolator*)globals->get_subsystem("interpolator"))
+ ((SGInterpolator*)globals->get_subsystem_mgr()
+ ->get_group(SGSubsystemMgr::INIT)->get_subsystem("interpolator"))
->interpolate(node, nPoints, values, deltas);
+ delete[] values;
+ delete[] deltas;
return naNil();
}
return naNum(0);
}
+static naRef f_abort(naContext c, naRef me, int argc, naRef* args)
+{
+ abort();
+ return naNil();
+}
+
// Return an array listing of all files in a directory
static naRef f_directory(naContext c, naRef me, int argc, naRef* args)
{
return result;
}
+// Parse XML file.
+// parsexml(<path> [, <start-tag> [, <end-tag> [, <data> [, <pi>]]]]);
+//
+// <path> ... absolute path to an XML file
+// <start-tag> ... callback function with two args: tag name, attribute hash
+// <end-tag> ... callback function with one arg: tag name
+// <data> ... callback function with one arg: data
+// <pi> ... callback function with two args: target, data
+// (pi = "processing instruction")
+// All four callback functions are optional and default to nil.
+// The function returns nil on error, or the validated file name otherwise.
+static naRef f_parsexml(naContext c, naRef me, int argc, naRef* args)
+{
+ if(argc < 1 || !naIsString(args[0]))
+ naRuntimeError(c, "parsexml(): path argument missing or not a string");
+ if(argc > 5) argc = 5;
+ for(int i=1; i<argc; i++)
+ if(!(naIsNil(args[i]) || naIsFunc(args[i])))
+ naRuntimeError(c, "parsexml(): callback argument not a function");
+
+ const char* file = fgValidatePath(naStr_data(args[0]), false);
+ if(!file) {
+ naRuntimeError(c, "parsexml(): reading '%s' denied "
+ "(unauthorized access)", naStr_data(args[0]));
+ return naNil();
+ }
+ std::ifstream input(file);
+ NasalXMLVisitor visitor(c, argc, args);
+ try {
+ readXML(input, visitor);
+ } catch (const sg_exception& e) {
+ naRuntimeError(c, "parsexml(): file '%s' %s",
+ file, e.getFormattedMessage().c_str());
+ return naNil();
+ }
+ return naStr_fromdata(naNewString(c), const_cast<char*>(file), strlen(file));
+}
+
+// Return UNIX epoch time in seconds.
+static naRef f_systime(naContext c, naRef me, int argc, naRef* args)
+{
+#ifdef WIN32
+ FILETIME ft;
+ GetSystemTimeAsFileTime(&ft);
+ double t = (4294967296.0 * ft.dwHighDateTime + ft.dwLowDateTime);
+ // Converts from 100ns units in 1601 epoch to unix epoch in sec
+ return naNum((t * 1e-7) - 11644473600.0);
+#else
+ time_t t;
+ struct timeval td;
+ do { t = time(0); gettimeofday(&td, 0); } while(t != time(0));
+ return naNum(t + 1e-6 * td.tv_usec);
+#endif
+}
+
+// Convert a cartesian point to a geodetic lat/lon/altitude.
+static naRef f_carttogeod(naContext c, naRef me, int argc, naRef* args)
+{
+ double lat, lon, alt, xyz[3];
+ if(argc != 3) naRuntimeError(c, "carttogeod() expects 3 arguments");
+ for(int i=0; i<3; i++)
+ xyz[i] = naNumValue(args[i]).num;
+ sgCartToGeod(xyz, &lat, &lon, &alt);
+ lat *= SG_RADIANS_TO_DEGREES;
+ lon *= SG_RADIANS_TO_DEGREES;
+ naRef vec = naNewVector(c);
+ naVec_append(vec, naNum(lat));
+ naVec_append(vec, naNum(lon));
+ naVec_append(vec, naNum(alt));
+ return vec;
+}
+
+// Convert a geodetic lat/lon/altitude to a cartesian point.
+static naRef f_geodtocart(naContext c, naRef me, int argc, naRef* args)
+{
+ if(argc != 3) naRuntimeError(c, "geodtocart() expects 3 arguments");
+ double lat = naNumValue(args[0]).num * SG_DEGREES_TO_RADIANS;
+ double lon = naNumValue(args[1]).num * SG_DEGREES_TO_RADIANS;
+ double alt = naNumValue(args[2]).num;
+ double xyz[3];
+ sgGeodToCart(lat, lon, alt, xyz);
+ naRef vec = naNewVector(c);
+ naVec_append(vec, naNum(xyz[0]));
+ naVec_append(vec, naNum(xyz[1]));
+ naVec_append(vec, naNum(xyz[2]));
+ return vec;
+}
+
+// For given geodetic point return array with elevation, and a material data
+// hash, or nil if there's no information available (tile not loaded). If
+// information about the material isn't available, then nil is returned instead
+// of the hash.
+static naRef f_geodinfo(naContext c, naRef me, int argc, naRef* args)
+{
+#define HASHSET(s,l,n) naHash_set(matdata, naStr_fromdata(naNewString(c),s,l),n)
+ if(argc < 2 || argc > 3)
+ naRuntimeError(c, "geodinfo() expects 2 or 3 arguments: lat, lon [, maxalt]");
+ double lat = naNumValue(args[0]).num;
+ double lon = naNumValue(args[1]).num;
+ double elev = argc == 3 ? naNumValue(args[2]).num : 10000;
+ const SGMaterial *mat;
+ SGGeod geod = SGGeod::fromDegM(lon, lat, elev);
+ if(!globals->get_scenery()->get_elevation_m(geod, elev, &mat))
+ return naNil();
+ naRef vec = naNewVector(c);
+ naVec_append(vec, naNum(elev));
+ naRef matdata = naNil();
+ if(mat) {
+ matdata = naNewHash(c);
+ naRef names = naNewVector(c);
+ const vector<string> n = mat->get_names();
+ for(unsigned int i=0; i<n.size(); i++)
+ naVec_append(names, naStr_fromdata(naNewString(c),
+ const_cast<char*>(n[i].c_str()), n[i].size()));
+ HASHSET("names", 5, names);
+ HASHSET("solid", 5, naNum(mat->get_solid()));
+ HASHSET("friction_factor", 15, naNum(mat->get_friction_factor()));
+ HASHSET("rolling_friction", 16, naNum(mat->get_rolling_friction()));
+ HASHSET("load_resistance", 15, naNum(mat->get_load_resistance()));
+ HASHSET("bumpiness", 9, naNum(mat->get_bumpiness()));
+ HASHSET("light_coverage", 14, naNum(mat->get_light_coverage()));
+ }
+ naVec_append(vec, matdata);
+ return vec;
+#undef HASHSET
+}
+
+
+class AirportInfoFilter : public FGAirport::AirportFilter
+{
+public:
+ AirportInfoFilter() : type(FGPositioned::AIRPORT) {
+ }
+
+ virtual FGPositioned::Type minType() const {
+ return type;
+ }
+
+ virtual FGPositioned::Type maxType() const {
+ return type;
+ }
+
+ FGPositioned::Type type;
+};
+
+// Returns data hash for particular or nearest airport of a <type>, or nil
+// on error.
+//
+// airportinfo(<id>); e.g. "KSFO"
+// airportinfo(<type>); type := ("airport"|"seaport"|"heliport")
+// airportinfo() same as airportinfo("airport")
+// airportinfo(<lat>, <lon> [, <type>]);
+static naRef f_airportinfo(naContext c, naRef me, int argc, naRef* args)
+{
+ static SGConstPropertyNode_ptr latn = fgGetNode("/position/latitude-deg", true);
+ static SGConstPropertyNode_ptr lonn = fgGetNode("/position/longitude-deg", true);
+ SGGeod pos;
+ FGAirport* apt = NULL;
+
+ if(argc >= 2 && naIsNum(args[0]) && naIsNum(args[1])) {
+ pos = SGGeod::fromDeg(args[1].num, args[0].num);
+ args += 2;
+ argc -= 2;
+ } else {
+ pos = SGGeod::fromDeg(lonn->getDoubleValue(), latn->getDoubleValue());
+ }
+
+ double maxRange = 10000.0; // expose this? or pick a smaller value?
+
+ AirportInfoFilter filter; // defaults to airports only
+
+ if(argc == 0) {
+ // fall through and use AIRPORT
+ } else if(argc == 1 && naIsString(args[0])) {
+ const char *s = naStr_data(args[0]);
+ if(!strcmp(s, "airport")) filter.type = FGPositioned::AIRPORT;
+ else if(!strcmp(s, "seaport")) filter.type = FGPositioned::SEAPORT;
+ else if(!strcmp(s, "heliport")) filter.type = FGPositioned::HELIPORT;
+ else {
+ // user provided an <id>, hopefully
+ apt = FGAirport::findByIdent(s);
+ if (!apt) {
+ // return nil here, but don't raise a runtime error; this is a
+ // legitamate way to validate an ICAO code, for example in a
+ // dialog box or similar.
+ return naNil();
+ }
+ }
+ } else {
+ naRuntimeError(c, "airportinfo() with invalid function arguments");
+ return naNil();
+ }
+
+ if(!apt) {
+ apt = FGAirport::findClosest(pos, maxRange, &filter);
+ if(!apt) return naNil();
+ }
+
+ string id = apt->ident();
+ string name = apt->name();
+
+ // set runway hash
+ naRef rwys = naNewHash(c);
+ for(unsigned int r=0; r<apt->numRunways(); ++r) {
+ FGRunway* rwy(apt->getRunwayByIndex(r));
+
+ naRef rwyid = naStr_fromdata(naNewString(c),
+ const_cast<char *>(rwy->ident().c_str()),
+ rwy->ident().length());
+
+ naRef rwydata = naNewHash(c);
+#define HASHSET(s,l,n) naHash_set(rwydata, naStr_fromdata(naNewString(c),s,l),n)
+ HASHSET("id", 2, rwyid);
+ HASHSET("lat", 3, naNum(rwy->latitude()));
+ HASHSET("lon", 3, naNum(rwy->longitude()));
+ HASHSET("heading", 7, naNum(rwy->headingDeg()));
+ HASHSET("length", 6, naNum(rwy->lengthM()));
+ HASHSET("width", 5, naNum(rwy->widthM()));
+ HASHSET("threshold", 9, naNum(rwy->displacedThresholdM()));
+ HASHSET("stopway", 7, naNum(rwy->stopwayM()));
+#undef HASHSET
+ naHash_set(rwys, rwyid, rwydata);
+ }
+
+ // set airport hash
+ naRef aptdata = naNewHash(c);
+#define HASHSET(s,l,n) naHash_set(aptdata, naStr_fromdata(naNewString(c),s,l),n)
+ HASHSET("id", 2, naStr_fromdata(naNewString(c),
+ const_cast<char *>(id.c_str()), id.length()));
+ HASHSET("name", 4, naStr_fromdata(naNewString(c),
+ const_cast<char *>(name.c_str()), name.length()));
+ HASHSET("lat", 3, naNum(apt->getLatitude()));
+ HASHSET("lon", 3, naNum(apt->getLongitude()));
+ HASHSET("elevation", 9, naNum(apt->getElevation() * SG_FEET_TO_METER));
+ HASHSET("has_metar", 9, naNum(apt->getMetar()));
+ HASHSET("runways", 7, rwys);
+#undef HASHSET
+ return aptdata;
+}
+
+
// Table of extension functions. Terminate with zeros.
-static struct { char* name; naCFunction func; } funcs[] = {
+static struct { const char* name; naCFunction func; } funcs[] = {
{ "getprop", f_getprop },
{ "setprop", f_setprop },
{ "print", f_print },
{ "_interpolate", f_interpolate },
{ "rand", f_rand },
{ "srand", f_srand },
+ { "abort", f_abort },
{ "directory", f_directory },
+ { "parsexml", f_parsexml },
+ { "systime", f_systime },
+ { "carttogeod", f_carttogeod },
+ { "geodtocart", f_geodtocart },
+ { "geodinfo", f_geodinfo },
+ { "airportinfo", f_airportinfo },
{ 0, 0 }
};
// sub-reference under the name "globals". This gives client-code
// write access to the namespace if someone wants to do something
// fancy.
- _globals = naStdLib(_context);
+ _globals = naInit_std(_context);
naSave(_context, _globals);
hashset(_globals, "globals", _globals);
- // Add in the math library under "math"
- hashset(_globals, "math", naMathLib(_context));
-
- // Add in the IO library. Disabled currently until after the
- // 0.9.10 release.
- // hashset(_globals, "io", naIOLib(_context));
- // hashset(_globals, "bits", naBitsLib(_context));
+ hashset(_globals, "math", naInit_math(_context));
+ hashset(_globals, "bits", naInit_bits(_context));
+ hashset(_globals, "io", naInit_io(_context));
+ hashset(_globals, "thread", naInit_thread(_context));
+ hashset(_globals, "utf8", naInit_utf8(_context));
// Add our custom extension functions:
for(i=0; funcs[i].name; i++)
}
ulCloseDir(dir);
+ // set signal and remove node to avoid restoring at reinit
+ const char *s = "nasal-dir-initialized";
+ SGPropertyNode *signal = fgGetNode("/sim/signals", true);
+ signal->setBoolValue(s, true);
+ signal->removeChildren(s, false);
+
// Pull scripts out of the property tree, too
loadPropertyScripts();
}
+void FGNasalSys::update(double)
+{
+ if(!_dead_listener.empty()) {
+ vector<FGNasalListener *>::iterator it, end = _dead_listener.end();
+ for(it = _dead_listener.begin(); it != end; ++it) delete *it;
+ _dead_listener.clear();
+ }
+
+ // The global context is a legacy thing. We use dynamically
+ // created contexts for naCall() now, so that we can call them
+ // recursively. But there are still spots that want to use it for
+ // naNew*() calls, which end up leaking memory because the context
+ // only clears out its temporary vector when it's *used*. So just
+ // junk it and fetch a new/reinitialized one every frame. This is
+ // clumsy: the right solution would use the dynamic context in all
+ // cases and eliminate _context entirely. But that's more work,
+ // and this works fine (yes, they say "New" and "Free", but
+ // they're very fast, just trust me). -Andy
+ naFreeContext(_context);
+ _context = naNewContext();
+}
+
// Loads the scripts found under /nasal in the global tree
void FGNasalSys::loadPropertyScripts()
{
if(n->hasChild("module"))
module = n->getStringValue("module");
- // allow multiple files to be specified within in a single
+ // allow multiple files to be specified within a single
// Nasal module tag
int j = 0;
SGPropertyNode *fn;
bool file_specified = false;
- while ( (fn = n->getChild("file", j)) != NULL ) {
+ while((fn = n->getChild("file", j)) != NULL) {
file_specified = true;
const char* file = fn->getStringValue();
SGPath p(globals->get_fg_root());
j++;
}
- // Old code which only allowed a single file to be specified per module
- /*
- const char* file = n->getStringValue("file");
- if(!n->hasChild("file")) file = 0; // Hrm...
- if(file) {
- SGPath p(globals->get_fg_root());
- p.append(file);
- loadModule(p, module);
- }
- */
-
const char* src = n->getStringValue("script");
if(!n->hasChild("script")) src = 0; // Hrm...
if(src)
// used to pass an associated property node to the module, which can then
// be accessed via cmdarg(). (This is, for example, used by XML dialogs.)
void FGNasalSys::createModule(const char* moduleName, const char* fileName,
- const char* src, int len, const SGPropertyNode* arg)
+ const char* src, int len,
+ const SGPropertyNode* cmdarg,
+ int argc, naRef* args)
{
naRef code = parse(fileName, src, len);
if(naIsNil(code))
if(!naHash_get(_globals, modname, &locals))
locals = naNewHash(_context);
- _cmdArg = (SGPropertyNode*)arg;
+ _cmdArg = (SGPropertyNode*)cmdarg;
- call(code, locals);
+ call(code, argc, args, locals);
hashset(_globals, moduleName, locals);
}
naRef code = parse(arg->getPath(true), nasal, strlen(nasal));
if(naIsNil(code)) return false;
- naContext c = naNewContext();
+ // Commands can be run "in" a module. Make sure that module
+ // exists, and set it up as the local variables hash for the
+ // command.
naRef locals = naNil();
if(moduleName[0]) {
- naRef modname = naNewString(c);
+ naRef modname = naNewString(_context);
naStr_fromdata(modname, (char*)moduleName, strlen(moduleName));
- if(!naHash_get(_globals, modname, &locals))
- locals = naNewHash(c);
+ if(!naHash_get(_globals, modname, &locals)) {
+ locals = naNewHash(_context);
+ naHash_set(_globals, modname, locals);
+ }
}
- // Cache the command argument for inspection via cmdarg(). For
+
+ // Cache this command's argument for inspection via cmdarg(). For
// performance reasons, we won't bother with it if the invoked
// code doesn't need it.
_cmdArg = (SGPropertyNode*)arg;
- // Call it!
- call(code, locals);
+ call(code, 0, 0, locals);
return true;
}
// "saved" somehow lest they be inadvertently cleaned. In this case,
// they are inserted into a globals.__gcsave hash and removed on
// expiration.
-void FGNasalSys::setTimer(int argc, naRef* args)
+void FGNasalSys::setTimer(naContext c, int argc, naRef* args)
{
// Extract the handler, delta, and simtime arguments:
naRef handler = argc > 0 ? args[0] : naNil();
- if(!(naIsCode(handler) || naIsCCode(handler) || naIsFunc(handler)))
+ if(!(naIsCode(handler) || naIsCCode(handler) || naIsFunc(handler))) {
+ naRuntimeError(c, "settimer() with invalid function argument");
return;
+ }
naRef delta = argc > 1 ? args[1] : naNil();
- if(naIsNil(delta)) return;
+ if(naIsNil(delta)) {
+ naRuntimeError(c, "settimer() with invalid time argument");
+ return;
+ }
bool simtime = (argc > 2 && naTrue(args[2])) ? false : true;
void FGNasalSys::handleTimer(NasalTimer* t)
{
- call(t->handler, naNil());
+ call(t->handler, 0, 0, naNil());
gcRelease(t->gcKey);
}
int FGNasalSys::_listenerId = 0;
-// setlistener(property, func, bool) extension function. The first argument
-// is either a ghost (SGPropertyNode_ptr*) or a string (global property
-// path), the second is a Nasal function, the optional third one a bool.
-// If the bool is true, then the listener is executed initially. The
-// setlistener() function returns a unique id number, that can be used
-// as argument to the removelistener() function.
-naRef FGNasalSys::setListener(int argc, naRef* args)
+// setlistener(<property>, <func> [, <initial=0> [, <persistent=1>]])
+// Attaches a callback function to a property (specified as a global
+// property path string or a SGPropertyNode_ptr* ghost). If the third,
+// optional argument (default=0) is set to 1, then the function is also
+// called initially. If the fourth, optional argument is set to 0, then the
+// function is only called when the property node value actually changes.
+// Otherwise it's called independent of the value whenever the node is
+// written to (default). The setlistener() function returns a unique
+// id number, which is to be used as argument to the removelistener()
+// function.
+naRef FGNasalSys::setListener(naContext c, int argc, naRef* args)
{
SGPropertyNode_ptr node;
naRef prop = argc > 0 ? args[0] : naNil();
if(naIsString(prop)) node = fgGetNode(naStr_data(prop), true);
else if(naIsGhost(prop)) node = *(SGPropertyNode_ptr*)naGhost_ptr(prop);
- else return naNil();
+ else {
+ naRuntimeError(c, "setlistener() with invalid property argument");
+ return naNil();
+ }
- if (node->isTied())
+ if(node->isTied())
SG_LOG(SG_NASAL, SG_DEBUG, "Attaching listener to tied property " <<
node->getPath());
- naRef handler = argc > 1 ? args[1] : naNil();
- if(!(naIsCode(handler) || naIsCCode(handler) || naIsFunc(handler)))
+ naRef code = argc > 1 ? args[1] : naNil();
+ if(!(naIsCode(code) || naIsCCode(code) || naIsFunc(code))) {
+ naRuntimeError(c, "setlistener() with invalid function argument");
return naNil();
+ }
- bool initial = argc > 2 && naTrue(args[2]);
+ int init = argc > 2 && naIsNum(args[2]) ? int(args[2].num) : 0;
+ int type = argc > 3 && naIsNum(args[3]) ? int(args[3].num) : 1;
+ FGNasalListener *nl = new FGNasalListener(node, code, this,
+ gcSave(code), _listenerId, init, type);
- FGNasalListener *nl = new FGNasalListener(node, handler, this,
- gcSave(handler));
- node->addChangeListener(nl, initial);
+ node->addChangeListener(nl, init);
_listener[_listenerId] = nl;
return naNum(_listenerId++);
// removelistener(int) extension function. The argument is the id of
// a listener as returned by the setlistener() function.
-naRef FGNasalSys::removeListener(int argc, naRef* args)
+naRef FGNasalSys::removeListener(naContext c, int argc, naRef* args)
{
naRef id = argc > 0 ? args[0] : naNil();
- if(!naIsNum(id))
- return naNil();
+ map<int, FGNasalListener *>::iterator it = _listener.find(int(id.num));
- int i = int(id.num);
- if (_listener.find(i) == _listener.end())
+ if(!naIsNum(id) || it == _listener.end() || it->second->_dead) {
+ naRuntimeError(c, "removelistener() with invalid listener id");
return naNil();
+ }
- FGNasalListener *nl = _listener[i];
- _listener.erase(i);
- delete nl;
+ it->second->_dead = true;
+ _dead_listener.push_back(it->second);
+ _listener.erase(it);
return naNum(_listener.size());
}
// FGNasalListener class.
-FGNasalListener::FGNasalListener(SGPropertyNode_ptr node, naRef handler,
- FGNasalSys* nasal, int key) :
+FGNasalListener::FGNasalListener(SGPropertyNode *node, naRef code,
+ FGNasalSys* nasal, int key, int id,
+ int init, int type) :
_node(node),
- _handler(handler),
+ _code(code),
_gcKey(key),
+ _id(id),
_nas(nasal),
- _active(0)
+ _init(init),
+ _type(type),
+ _active(0),
+ _dead(false),
+ _last_int(0L),
+ _last_float(0.0)
{
+ if(_type == 0 && !_init)
+ changed(node);
}
FGNasalListener::~FGNasalListener()
_nas->gcRelease(_gcKey);
}
-void FGNasalListener::valueChanged(SGPropertyNode* node)
+void FGNasalListener::call(SGPropertyNode* which, naRef mode)
{
- // drop recursive listener calls
- if (_active)
- return;
-
+ if(_active || _dead) return;
+ SG_LOG(SG_NASAL, SG_DEBUG, "trigger listener #" << _id);
_active++;
- _nas->_cmdArg = node;
- _nas->call(_handler, naNil());
+ naRef arg[4];
+ arg[0] = _nas->propNodeGhost(which);
+ arg[1] = _nas->propNodeGhost(_node);
+ arg[2] = mode; // value changed, child added/removed
+ arg[3] = naNum(_node != which); // child event?
+ _nas->call(_code, 4, arg, naNil());
_active--;
}
+void FGNasalListener::valueChanged(SGPropertyNode* node)
+{
+ if(_type < 2 && node != _node) return; // skip child events
+ if(_type > 0 || changed(_node) || _init)
+ call(node, naNum(0));
+
+ _init = 0;
+}
+
+void FGNasalListener::childAdded(SGPropertyNode*, SGPropertyNode* child)
+{
+ if(_type == 2) call(child, naNum(1));
+}
+
+void FGNasalListener::childRemoved(SGPropertyNode*, SGPropertyNode* child)
+{
+ if(_type == 2) call(child, naNum(-1));
+}
+
+bool FGNasalListener::changed(SGPropertyNode* node)
+{
+ using namespace simgear;
+ props::Type type = node->getType();
+ if(type == props::NONE) return false;
+ if(type == props::UNSPECIFIED) return true;
+
+ bool result;
+ switch(type) {
+ case props::BOOL:
+ case props::INT:
+ case props::LONG:
+ {
+ long l = node->getLongValue();
+ result = l != _last_int;
+ _last_int = l;
+ return result;
+ }
+ case props::FLOAT:
+ case props::DOUBLE:
+ {
+ double d = node->getDoubleValue();
+ result = d != _last_float;
+ _last_float = d;
+ return result;
+ }
+ default:
+ {
+ string s = node->getStringValue();
+ result = s != _last_string;
+ _last_string = s;
+ return result;
+ }
+ }
+}
// destructor the <unload> script. The latter happens when the model branch
// is removed from the scene graph.
+unsigned int FGNasalModelData::_module_id = 0;
+
void FGNasalModelData::modelLoaded(const string& path, SGPropertyNode *prop,
osg::Node *)
{
- SGPropertyNode *n = prop->getNode("nasal"), *load;
- if (!n)
+ if(!prop)
+ return;
+ SGPropertyNode *nasal = prop->getNode("nasal");
+ if(!nasal)
return;
- load = n->getNode("load");
- _unload = n->getNode("unload");
- if (!load && !_unload)
+ SGPropertyNode *load = nasal->getNode("load");
+ _unload = nasal->getNode("unload");
+ if(!load && !_unload)
return;
- _module = path;
+ std::stringstream m;
+ m << "__model" << _module_id++;
+ _module = m.str();
+
const char *s = load ? load->getStringValue() : "";
- FGNasalSys *nas = (FGNasalSys *)globals->get_subsystem("nasal");
- nas->createModule(_module.c_str(), _module.c_str(), s, strlen(s));
+
+ naRef arg[2];
+ arg[0] = nasalSys->propNodeGhost(_root);
+ arg[1] = nasalSys->propNodeGhost(prop);
+ nasalSys->createModule(_module.c_str(), path.c_str(), s, strlen(s),
+ _root, 2, arg);
}
FGNasalModelData::~FGNasalModelData()
{
- if (_module.empty())
+ if(_module.empty())
return;
- FGNasalSys *nas = (FGNasalSys *)globals->get_subsystem("nasal");
- if (!nas) {
- SG_LOG(SG_NASAL, SG_ALERT, "Trying to run an <unload> script "
+ if(!nasalSys) {
+ SG_LOG(SG_NASAL, SG_WARN, "Trying to run an <unload> script "
"without Nasal subsystem present.");
return;
}
- if (_unload) {
+ if(_unload) {
const char *s = _unload->getStringValue();
- nas->createModule(_module.c_str(), _module.c_str(), s, strlen(s));
+ nasalSys->createModule(_module.c_str(), _module.c_str(), s, strlen(s), _root);
}
- nas->deleteModule(_module.c_str());
+ nasalSys->deleteModule(_module.c_str());
+}
+
+
+
+// NasalXMLVisitor class: handles EasyXML visitor callback for parsexml()
+//
+NasalXMLVisitor::NasalXMLVisitor(naContext c, int argc, naRef* args) :
+ _c(naSubContext(c)),
+ _start_element(argc > 1 ? args[1] : naNil()),
+ _end_element(argc > 2 ? args[2] : naNil()),
+ _data(argc > 3 ? args[3] : naNil()),
+ _pi(argc > 4 ? args[4] : naNil())
+{
+}
+
+void NasalXMLVisitor::startElement(const char* tag, const XMLAttributes& a)
+{
+ if(naIsNil(_start_element)) return;
+ naRef attr = naNewHash(_c);
+ for(int i=0; i<a.size(); i++) {
+ naRef name = make_string(a.getName(i));
+ naRef value = make_string(a.getValue(i));
+ naHash_set(attr, name, value);
+ }
+ call(_start_element, 2, make_string(tag), attr);
+}
+
+void NasalXMLVisitor::endElement(const char* tag)
+{
+ if(!naIsNil(_end_element)) call(_end_element, 1, make_string(tag));
+}
+
+void NasalXMLVisitor::data(const char* str, int len)
+{
+ if(!naIsNil(_data)) call(_data, 1, make_string(str, len));
+}
+
+void NasalXMLVisitor::pi(const char* target, const char* data)
+{
+ if(!naIsNil(_pi)) call(_pi, 2, make_string(target), make_string(data));
+}
+
+void NasalXMLVisitor::call(naRef func, int num, naRef a, naRef b)
+{
+ naRef args[2];
+ args[0] = a;
+ args[1] = b;
+ naCall(_c, func, num, args, naNil(), naNil());
+ if(naGetError(_c))
+ naRethrowError(_c);
+}
+
+naRef NasalXMLVisitor::make_string(const char* s, int n)
+{
+ return naStr_fromdata(naNewString(_c), const_cast<char *>(s),
+ n < 0 ? strlen(s) : n);
}
projects / flightgear.git / blobdiff