VALUE
rb_enc_associate_index(VALUE obj, int idx)
{
rb_encoding *enc;
int oldidx, oldtermlen, termlen;
/* enc_check_capable(obj);*/
rb_check_frozen(obj);
oldidx = rb_enc_get_index(obj);
if (oldidx == idx)
return obj;
if (SPECIAL_CONST_P(obj)) {
rb_raise(rb_eArgError, "cannot set encoding");
}
enc = must_encindex(idx);
if (!ENC_CODERANGE_ASCIIONLY(obj) ||
!rb_enc_asciicompat(enc)) {
ENC_CODERANGE_CLEAR(obj);
}
termlen = rb_enc_mbminlen(enc);
oldtermlen = rb_enc_mbminlen(rb_enc_from_index(oldidx));
if (oldtermlen < termlen && RB_TYPE_P(obj, T_STRING)) {
rb_str_fill_terminator(obj, termlen);
}
enc_set_index(obj, idx);
return obj;
}
void
rb_enc_set_index(VALUE obj, int idx)
{
rb_check_frozen(obj);
must_encindex(idx);
enc_set_index(obj, idx);
}
VALUE
rb_enc_associate_index(VALUE obj, int idx)
{
/* enc_check_capable(obj);*/
rb_check_frozen(obj);
if (rb_enc_get_index(obj) == idx)
return obj;
if (SPECIAL_CONST_P(obj)) {
rb_raise(rb_eArgError, "cannot set encoding");
}
if (!ENC_CODERANGE_ASCIIONLY(obj) ||
!rb_enc_asciicompat(rb_enc_from_index(idx))) {
ENC_CODERANGE_CLEAR(obj);
}
enc_set_index(obj, idx);
return obj;
}