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date_strptime.c: get rid of backtrack explosion

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* ext/date/date_strptime.c (date__strptime_internal): unset
  case-insensitive flag for [:alpha:], which already implies both
  cases, to get rid of backtrack explosion.  [ruby-core:58984]
  [Bug #9221]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@44126 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2013-12-10 14:58:43 +00:00
parent 037a9d0655
commit 9a938987cb
2 changed files with 9 additions and 2 deletions
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7
ChangeLog
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@ -1,3 +1,10 @@
Tue Dec 10 23:58:30 2013 Nobuyoshi Nakada <nobu@ruby-lang.org>
* ext/date/date_strptime.c (date__strptime_internal): unset
case-insensitive flag for [:alpha:], which already implies both
cases, to get rid of backtrack explosion. [ruby-core:58984]
[Bug #9221]
Tue Dec 10 23:44:42 2013 Nobuyoshi Nakada <nobu@ruby-lang.org>
* array.c (rb_ary_hash): add salt to differentiate false and empty

4
ext/date/date_strptime.c
View file

@ -567,8 +567,8 @@ date__strptime_internal(const char *str, size_t slen,
static const char pat_source[] =
"\\A("
"(?:gmt|utc?)?[-+]\\d+(?:[,.:]\\d+(?::\\d+)?)?"
"|[[:alpha:].\\s]+(?:standard|daylight)\\s+time\\b"
"|[[:alpha:]]+(?:\\s+dst)?\\b"
"|(?-i:[[:alpha:].\\s]+)(?:standard|daylight)\\s+time\\b"
"|(?-i:[[:alpha:]]+)(?:\\s+dst)?\\b"
")";
static VALUE pat = Qnil;
VALUE m, b;