Bug returning Fixnums >= 2**30 in the C API
-------------------------------------------
Key: JRUBY-5029
URL: http://jira.codehaus.org/browse/JRUBY-5029
Project: JRuby
Issue Type: Bug
Components: Extensions
Environment: $ ~/jruby/bin/jruby -v
jruby 1.6.0.dev (ruby 1.8.7 patchlevel 249) (2010-08-20 9a285a3) (OpenJDK
Client VM 1.6.0_18) [i386-java]
$ uname -a
Linux ubuntu 2.6.32-23-generic #37-Ubuntu SMP Fri Jun 11 07:54:58 UTC 2010 i686
GNU/Linux
Reporter: Jeremy Evans
There is a bug in the C API related to returning Fixnums greater than or equal
to 2**30 in the C API. 2**31 ends up being subtracted from them, as shown by
this code:
Example Extension:
{noformat}
#include <ruby.h>
static VALUE jrt(VALUE self) {
printf("%li\n",NUM2LONG(rb_funcall(self, rb_intern("to_i"), 0)));
rb_funcall(self, rb_intern("p"), 1, rb_funcall(self, rb_intern("to_i"), 0));
return LONG2NUM(NUM2LONG(rb_funcall(self, rb_intern("to_i"), 0)));
}
void Init_jrt(void) {
rb_define_method(rb_cTime, "jrt", jrt, 0);
}
{noformat}
Output:
{noformat}
$ ~/jruby/bin/jruby -r jrt -e "p Time.now.jrt; p :-; p Time.at(2**30).jrt; p
:-; p Time.at(2**30 - 1).jrt"
calling init (7477c4)
-865143417
-865143417
-865143417
:-
-1073741824
-1073741824
-1073741824
:-
1073741823
1073741823
1073741823
{noformat}
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