1berry/ruby
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

eval_error.c: log10(0) is ERANGE

Browse Source 
By definition, the logarithm of 0 is negative infinity.  This is a
pole error (cf: cf: ISO/IEC 9899:1999 section 7.12.1 paragraph 3) and
of course, cannot fit into an `int` value.  We have to resort to
INT_MIN.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@65743 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
shyouhei 2018-11-15 09:03:03 +00:00
parent b7f5c573ef
commit 06e2873ed1
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
eval_error.c
View File

@ -195,7 +195,7 @@ print_backtrace(const VALUE eclass, const VALUE errat, const VALUE str, int reve
long len = RARRAY_LEN(errat); long len = RARRAY_LEN(errat);
int skip = eclass == rb_eSysStackError; int skip = eclass == rb_eSysStackError;
const int threshold = 1000000000; const int threshold = 1000000000;
int width = ((int)log10((double)(len > threshold ? int width = (len <= 1) ? INT_MIN : ((int)log10((double)(len > threshold ?
((len - 1) / threshold) : ((len - 1) / threshold) :
len - 1)) + len - 1)) +
(len < threshold ? 0 : 9) + 1); (len < threshold ? 0 : 9) + 1);