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Make empty_string a fake string

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Nobuyoshi Nakada 2020-01-31 14:24:07 +09:00
parent f31dc8a458
commit 0dd6f020fc
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GPG key ID: 4BC7D6DF58D8DF60
1 changed files with 9 additions and 9 deletions
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18
string.c
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@ -215,7 +215,13 @@ str_make_independent(VALUE str)
/* symbols for [up|down|swap]case/capitalize options */
static VALUE sym_ascii, sym_turkic, sym_lithuanian, sym_fold;
static VALUE empty_string;
static const struct RString empty_fake_string = {
{
T_STRING | STR_FAKESTR |
ENC_CODERANGE_7BIT | (ENCINDEX_US_ASCII << ENCODING_SHIFT)
}
};
#define empty_string ((VALUE)&empty_fake_string)
static rb_encoding *
get_actual_encoding(const int encidx, VALUE str)
@ -4885,16 +4891,13 @@ rb_str_slice_bang(int argc, VALUE *argv, VALUE str)
{
VALUE result;
VALUE buf[3];
int i;
rb_check_arity(argc, 1, 2);
for (i=0; i<argc; i++) {
buf[i] = argv[i];
}
MEMCPY(buf, argv, VALUE, argc);
str_modify_keep_cr(str);
result = rb_str_aref_m(argc, buf, str);
if (!NIL_P(result)) {
buf[i] = empty_string;
buf[argc] = empty_string;
rb_str_aset_m(argc+1, buf, str);
}
return result;
@ -11382,9 +11385,6 @@ Init_String(void)
rb_define_method(rb_cString, "unicode_normalize!", rb_str_unicode_normalize_bang, -1);
rb_define_method(rb_cString, "unicode_normalized?", rb_str_unicode_normalized_p, -1);
empty_string = rb_fstring_enc_lit("", rb_usascii_encoding());
rb_gc_register_mark_object(empty_string);
rb_fs = Qnil;
rb_define_hooked_variable("$;", &rb_fs, 0, rb_fs_setter);
rb_define_hooked_variable("$-F", &rb_fs, 0, rb_fs_setter);