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* io.c (io_setstrbuf): cut down the buffer if longer.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@34592 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2012-02-14 07:00:33 +00:00
parent 799680354e
commit 52cb46337e
2 changed files with 12 additions and 3 deletions

View file

@ -1,3 +1,7 @@
Tue Feb 14 16:00:30 2012 Nobuyoshi Nakada <nobu@ruby-lang.org>
* io.c (io_setstrbuf): cut down the buffer if longer.
Tue Feb 14 15:06:37 2012 Nobuyoshi Nakada <nobu@ruby-lang.org>
* lib/test/unit/assertions.rb (build_message): skip escaped

11
io.c
View file

@ -2072,7 +2072,7 @@ io_shift_cbuf(rb_io_t *fptr, int len, VALUE *strp)
}
static void
io_setstrbuf(VALUE *str,long len)
io_setstrbuf(VALUE *str, long len)
{
#ifdef _WIN32
len = (len + 1) & ~1L; /* round up for wide char */
@ -2081,8 +2081,13 @@ io_setstrbuf(VALUE *str,long len)
*str = rb_str_new(0, 0);
}
else {
StringValue(*str);
len -= RSTRING_LEN(*str);
VALUE s = StringValue(*str);
long clen = RSTRING_LEN(s);
if (clen >= len) {
if (clen != len) rb_str_set_len(s, len);
return;
}
len -= clen;
}
rb_str_modify_expand(*str, len);
}