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* string.c (rb_str_new4): handle tail shared string.

Browse source 
(ruby-bugs-ja:PR#370)


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@3164 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2002-12-17 18:20:46 +00:00
parent 49fc21f31e
commit f4b8bbb143
2 changed files with 29 additions and 9 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
Wed Dec 18 02:27:34 2002 Nobuyoshi Nakada <nobu.nokada@softhome.net>
* string.c (rb_str_new4): handle tail shared string.
(ruby-bugs-ja:PR#370)
Tue Dec 17 21:08:29 2002 Nobuyoshi Nakada <nobu.nokada@softhome.net>
* node.h (NODE_ATTRASGN): new node, assignment to attribute.

33
string.c
View file

@ -137,6 +137,21 @@ rb_str_new3(str)
return str_new3(rb_obj_class(str), str);
}
static VALUE
str_new4(klass, str)
VALUE klass, str;
{
VALUE str2 = rb_obj_alloc(klass);
RSTRING(str2)->len = RSTRING(str)->len;
RSTRING(str2)->ptr = RSTRING(str)->ptr;
RSTRING(str)->aux.shared = str2;
FL_SET(str, ELTS_SHARED);
OBJ_INFECT(str2, str);
return str2;
}
VALUE
rb_str_new4(orig)
VALUE orig;
@ -145,20 +160,20 @@ rb_str_new4(orig)
klass = rb_obj_class(orig);
if (FL_TEST(orig, ELTS_SHARED)) {
str = str_new3(klass, RSTRING(orig)->aux.shared);
long ofs;
str = RSTRING(orig)->aux.shared;
ofs = RSTRING(str)->len - RSTRING(orig)->len;
str = str_new3(klass, str);
RSTRING(str)->ptr += ofs;
RSTRING(str)->len -= ofs;
}
else if (FL_TEST(orig, STR_ASSOC)) {
str = str_new(klass, RSTRING(orig)->ptr, RSTRING(orig)->len);
OBJ_INFECT(str, orig);
}
else {
str = rb_obj_alloc(klass);
RSTRING(str)->len = RSTRING(orig)->len;
RSTRING(str)->ptr = RSTRING(orig)->ptr;
RSTRING(orig)->aux.shared = str;
FL_SET(orig, ELTS_SHARED);
str = str_new4(klass, orig);
}
OBJ_INFECT(str, orig);
OBJ_FREEZE(str);
return str;
}
@ -477,7 +492,7 @@ rb_str_substr(str, beg, len)
if (len > sizeof(struct RString)/2 &&
beg + len == RSTRING(str)->len &&
!FL_TEST(str, STR_ASSOC)) {
if (!FL_TEST(str, ELTS_SHARED)) str = rb_str_new4(str);
if (!FL_TEST(str, ELTS_SHARED)) str = str_new4(CLASS_OF(str), str);
str2 = rb_str_new3(str);
RSTRING(str2)->ptr += beg;
RSTRING(str2)->len = len;