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* string.c (str_gsub): should preserve last successful match

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data.  [ruby-dev:35182]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@17447 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
matz 2008-06-19 17:11:55 +00:00
parent e929f49e56
commit 5336cbdfd3
3 changed files with 22 additions and 19 deletions
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5
ChangeLog
View File

@ -1,3 +1,8 @@
Fri Jun 20 02:11:01 2008 Yukihiro Matsumoto <matz@ruby-lang.org>
* string.c (str_gsub): should preserve last successful match
data. [ruby-dev:35182]
Fri Jun 20 01:07:28 2008 Koichi Sasada <ko1@atdot.net>
* KNOWNBUGS.rb, bootstraptest/pending.rb: move a bug (?) to pending.

1
bootstraptest/test_proc.rb
View File

@ -392,6 +392,5 @@ assert_equal 'ok', %q{
f = Foo.new
a_proc = give_it
p :call_it
f.call_it(&give_it())
}, '[ruby-core:15711]'

35
string.c
View File

@ -3084,8 +3084,7 @@ get_pat(VALUE pat, int quote)
static VALUE
rb_str_sub_bang(int argc, VALUE *argv, VALUE str)
{
VALUE pat, repl, match, hash = Qnil;
struct re_registers *regs;
VALUE pat, repl, hash = Qnil;
int iter = 0;
int tainted = 0;
long plen;
@ -3109,15 +3108,13 @@ rb_str_sub_bang(int argc, VALUE *argv, VALUE str)
if (rb_reg_search(pat, str, 0, 0) >= 0) {
rb_encoding *enc;
int cr = ENC_CODERANGE(str);
match = rb_backref_get();
regs = RMATCH_REGS(match);
VALUE match = rb_backref_get();
struct re_registers *regs = RMATCH_REGS(match);
if (iter || !NIL_P(hash)) {
char *p = RSTRING_PTR(str); long len = RSTRING_LEN(str);
if (iter) {
rb_match_busy(match);
repl = rb_obj_as_string(rb_yield(rb_reg_nth_match(0, match)));
}
else {
@ -3126,7 +3123,6 @@ rb_str_sub_bang(int argc, VALUE *argv, VALUE str)
}
str_mod_check(str, p, len);
str_frozen_check(str);
if (iter) rb_backref_set(match);
}
else {
repl = rb_reg_regsub(repl, str, regs, pat);
@ -3217,7 +3213,8 @@ str_gsub(int argc, VALUE *argv, VALUE str, int bang)
VALUE pat, val, repl, match, dest, hash = Qnil;
struct re_registers *regs;
long beg, n;
long offset, blen, slen, len;
long beg0, end0;
long offset, blen, slen, len, last;
int iter = 0;
char *sp, *cp;
int tainted = 0;
@ -3241,13 +3238,14 @@ str_gsub(int argc, VALUE *argv, VALUE str, int bang)
}
pat = get_pat(argv[0], 1);
offset=0; n=0;
beg = rb_reg_search(pat, str, 0, 0);
if (beg < 0) {
if (bang) return Qnil; /* no match, no substitution */
return rb_str_dup(str);
}
offset = 0;
n = 0;
blen = RSTRING_LEN(str) + 30; /* len + margin */
dest = rb_str_buf_new(blen);
sp = RSTRING_PTR(str);
@ -3259,9 +3257,10 @@ str_gsub(int argc, VALUE *argv, VALUE str, int bang)
n++;
match = rb_backref_get();
regs = RMATCH_REGS(match);
beg0 = BEG(0);
end0 = END(0);
if (iter || !NIL_P(hash)) {
if (iter) {
rb_match_busy(match);
val = rb_obj_as_string(rb_yield(rb_reg_nth_match(0, match)));
}
else {
@ -3273,7 +3272,6 @@ str_gsub(int argc, VALUE *argv, VALUE str, int bang)
if (val == dest) { /* paranoid check [ruby-dev:24827] */
rb_raise(rb_eRuntimeError, "block should not cheat");
}
if (iter) rb_backref_set(match);
}
else {
val = rb_reg_regsub(repl, str, regs, pat);
@ -3288,16 +3286,17 @@ str_gsub(int argc, VALUE *argv, VALUE str, int bang)
rb_str_buf_append(dest, val);
offset = END(0);
if (BEG(0) == END(0)) {
last = offset;
offset = end0;
if (beg0 == end0) {
/*
* Always consume at least one character of the input string
* in order to prevent infinite loops.
*/
if (RSTRING_LEN(str) <= END(0)) break;
len = rb_enc_mbclen(RSTRING_PTR(str)+END(0), RSTRING_END(str), str_enc);
rb_enc_str_buf_cat(dest, RSTRING_PTR(str)+END(0), len, str_enc);
offset = END(0) + len;
if (RSTRING_LEN(str) <= end0) break;
len = rb_enc_mbclen(RSTRING_PTR(str)+end0, RSTRING_END(str), str_enc);
rb_enc_str_buf_cat(dest, RSTRING_PTR(str)+end0, len, str_enc);
offset = end0 + len;
}
cp = RSTRING_PTR(str) + offset;
if (offset > RSTRING_LEN(str)) break;
@ -3306,7 +3305,7 @@ str_gsub(int argc, VALUE *argv, VALUE str, int bang)
if (RSTRING_LEN(str) > offset) {
rb_enc_str_buf_cat(dest, cp, RSTRING_LEN(str) - offset, str_enc);
}
rb_backref_set(match);
rb_reg_search(pat, str, last, 0);
if (bang) {
rb_str_shared_replace(str, dest);
}