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* string.c (rb_str_change_terminator_length): New function to change

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termlen and resize heap for the terminator. This is split from
  rb_str_fill_terminator (str_fill_term) because filling terminator
  and changing terminator length are different things. [Bug #12536]

* internal.h: declaration for rb_str_change_terminator_length.

* string.c (str_fill_term): Simplify only to zero-fill the terminator.
  For non-shared strings, it assumes that (capa + termlen) bytes of
  heap is allocated. This partially reverts r55557.

* encoding.c (rb_enc_associate_index): rb_str_change_terminator_length
  is used, and it should be called whenever the termlen is changed.

* string.c (str_capacity): New static function to return capacity
  of a string with the given termlen, because the termlen may
  sometimes be different from TERM_LEN(str) especially during
  changing termlen or filling terminator with specific termlen.

* string.c (rb_str_capacity): Use str_capacity.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@55575 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
ngoto 2016-07-05 10:45:23 +00:00
parent a3ca2c7cd5
commit 5eff15d1bd
4 changed files with 70 additions and 27 deletions
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internal.h
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@ -1356,6 +1356,7 @@ VALUE rb_id_quote_unprintable(ID);
#define QUOTE(str) rb_str_quote_unprintable(str)
#define QUOTE_ID(id) rb_id_quote_unprintable(id)
char *rb_str_fill_terminator(VALUE str, const int termlen);
void rb_str_change_terminator_length(VALUE str, const int oldtermlen, const int termlen);
VALUE rb_str_locktmp_ensure(VALUE str, VALUE (*func)(VALUE), VALUE arg);
#ifdef RUBY_ENCODING_H
VALUE rb_external_str_with_enc(VALUE str, rb_encoding *eenc);