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MRI: improve error printing 

`Debug()` is CRuby-style and `showMsg` is RGSS-style.
The `Debug()` output is safe, `showMsg` might be fragile.
This commit is contained in:
cremno 2014-04-14 00:07:51 +02:00
parent ab9464006b
commit 4ca9e82a14
1 changed files with 29 additions and 10 deletions
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39
binding-mri/binding-mri.cpp
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@ -314,6 +314,34 @@ static void runRMXPScripts()
} }
} }
static void showExc(VALUE exc)
{
VALUE bt = rb_funcall2(exc, rb_intern("backtrace"), 0, NULL);
VALUE bt0 = rb_ary_entry(bt, 0);
VALUE name = rb_class_path(rb_obj_class(exc));
VALUE ds = rb_sprintf("%" PRIsVALUE ": %" PRIsVALUE " (%" PRIsVALUE ")",
bt0, exc, name);
// omit "useless" last entry (from ruby:1:in `eval')
for (long i = 1, btlen = RARRAY_LEN(bt) - 1; i < btlen; ++i)
rb_str_catf(ds, "\n\tfrom %" PRIsVALUE, rb_ary_entry(bt, i));
Debug() << StringValueCStr(ds);
ID id_index = rb_intern("index");
// an "offset" argument is not needed for the first time
VALUE argv[2] = { rb_str_new_cstr(":") };
long filelen = NUM2LONG(rb_funcall2(bt0, id_index, 1, argv));
argv[1] = LONG2NUM(filelen + 1);
VALUE tmp = rb_funcall2(bt0, id_index, ARRAY_SIZE(argv), argv);
long linelen = NUM2LONG(tmp) - filelen - 1;
VALUE file = rb_str_subseq(bt0, 0, filelen);
VALUE line = rb_str_subseq(bt0, filelen + 1, linelen);
VALUE ms = rb_sprintf("Script '%" PRIsVALUE "' line %" PRIsVALUE
": %" PRIsVALUE " occured.\n\n%" PRIsVALUE,
file, line, name, exc);
showMsg(StringValueCStr(ms));
}
static void mriBindingExecute() static void mriBindingExecute()
{ {
ruby_setup(); ruby_setup();
@ -332,16 +360,7 @@ static void mriBindingExecute()
VALUE exc = rb_errinfo(); VALUE exc = rb_errinfo();
if (!NIL_P(exc) && !rb_obj_is_kind_of(exc, rb_eSystemExit)) if (!NIL_P(exc) && !rb_obj_is_kind_of(exc, rb_eSystemExit))
{ showExc(exc);
Debug() << "Had exception:" << rb_class2name(rb_obj_class(exc));
VALUE bt = rb_funcall2(exc, rb_intern("backtrace"), 0, NULL);
rb_p(bt);
VALUE msg = rb_funcall2(exc, rb_intern("message"), 0, NULL);
if (RSTRING_LEN(msg) < 256)
showMsg(RSTRING_PTR(msg));
else
Debug() << (RSTRING_PTR(msg));
}
ruby_cleanup(0); ruby_cleanup(0);