kotovalexarian-likes-github/ruby--ruby
1
0
Fork 0
mirror of https://github.com/ruby/ruby.git synced 2022-11-09 12:17:21 -05:00
Code Releases Activity

* bignum.c (big2ulong): Add code specialized for SIZEOF_LONG <=

Browse source 
SIZEOF_BDIGITS.
  This prevents shift witdth warning from "num <<= BITSPERDIG".



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@41615 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
akr 2013-06-25 03:31:20 +00:00
parent ab0a003183
commit 26dd237449
2 changed files with 14 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

6
ChangeLog
View file

@ -1,3 +1,9 @@
Tue Jun 25 12:28:57 2013 Tanaka Akira <akr@fsij.org>
* bignum.c (big2ulong): Add code specialized for SIZEOF_LONG <=
SIZEOF_BDIGITS.
This prevents shift witdth warning from "num <<= BITSPERDIG".
Tue Jun 25 12:23:30 2013 Koichi Sasada <ko1@atdot.net>
* gc.c: fix oldgen/remembered_shady counting algorithm.

9
bignum.c
View file

@ -2413,17 +2413,24 @@ big2ulong(VALUE x, const char *type, int check)
unsigned long num;
BDIGIT *ds;
if (len == 0)
return 0;
if (BIGSIZE(x) > sizeof(long)) {
if (check)
rb_raise(rb_eRangeError, "bignum too big to convert into `%s'", type);
len = bdigit_roomof(sizeof(long));
if (bdigit_roomof(sizeof(long)) < len)
len = bdigit_roomof(sizeof(long));
}
ds = BDIGITS(x);
#if SIZEOF_LONG <= SIZEOF_BDIGITS
num = ds[0];
#else
num = 0;
while (len--) {
num <<= BITSPERDIG;
num += (unsigned long)ds[len]; /* overflow is already checked */
}
#endif
return num;
}