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src/Scripting/NasalSys.cxx: Optionally prefix all Nasal output with Nasal file:line.

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Depends on /sim/nasal-log-file-line. E.g. enable with:

    --prop:/sim/nasal-log-file-line=1.
This commit is contained in:
Julian Smith 2019-09-17 21:06:39 +01:00
parent 9e610af55d
commit b35bf51fa0
1 changed files with 38 additions and 1 deletions
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39
src/Scripting/NasalSys.cxx
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@ -503,11 +503,28 @@ static naRef f_setprop(naContext c, naRef me, int argc, naRef* args)
return naNum(result);
}
struct SimNasalLogFileLine : SGPropertyChangeListener
{
SimNasalLogFileLine() {
SGPropertyNode* node = fgGetNode("/sim/nasal-log-file-line", true /*create*/);
node->addChangeListener(this, true /*initial*/);
}
virtual void valueChanged(SGPropertyNode* node) {
_file_line = node->getIntValue();
}
static bool _file_line;
};
bool SimNasalLogFileLine::_file_line = false;
// print() extension function. Concatenates and prints its arguments
// to the FlightGear log. Uses the highest log level (SG_ALERT), to
// make sure it appears. Is there better way to do this?
static naRef f_print(naContext c, naRef me, int argc, naRef* args)
{
static SimNasalLogFileLine snlfl;
string buf;
int n = argc;
for(int i=0; i<n; i++) {
@ -515,7 +532,27 @@ static naRef f_print(naContext c, naRef me, int argc, naRef* args)
if(naIsNil(s)) continue;
buf += naStr_data(s);
}
SG_LOG(SG_NASAL, SG_ALERT, buf);
if (snlfl._file_line) {
/* Copy what SG_LOG() does, but use nasal file:line instead of
our own __FILE__ and __LINE__. */
if (sglog().would_log(SG_NASAL, SG_ALERT)) {
int frame = 0;
const char* file = naStr_data(naGetSourceFile(c, 0));
if (simgear::strutils::ends_with( file, "/globals.nas")) {
/* This generally means have been called by globals.nas's
printf function; go one step up the stack so we give the
file:line of the caller of printf, which is generally more
useful. */
frame += 1;
file = naStr_data(naGetSourceFile(c, frame));
}
int line = naGetLine(c, frame);
sglog().log(SG_NASAL, SG_ALERT, file, line, buf);
}
}
else {
SG_LOG(SG_NASAL, SG_ALERT, buf);
}
return naNum(buf.length());
}