Method: StringIO#set_encoding

Defined in:
ext/stringio/stringio.c

#set_encoding(ext_enc, [int_enc[, opt]]) ⇒ Object

Specify the encoding of the StringIO as ext_enc. Use the default external encoding if ext_enc is nil. 2nd argument int_enc and optional hash opt argument are ignored; they are for API compatibility to IO.



1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
 
# File 'ext/stringio/stringio.c', line 1773

static VALUE
strio_set_encoding(int argc, VALUE *argv, VALUE self)
{
    rb_encoding* enc;
    struct StringIO *ptr = StringIO(self);
    VALUE ext_enc, int_enc, opt;

    argc = rb_scan_args(argc, argv, "11:", &ext_enc, &int_enc, &opt);

    if (NIL_P(ext_enc)) {
	enc = rb_default_external_encoding();
    }
    else {
	enc = rb_find_encoding(ext_enc);
	if (!enc) {
	    rb_io_enc_t convconfig;
	    int oflags, fmode;
	    VALUE vmode = rb_str_append(rb_str_new_cstr("r:"), ext_enc);
	    rb_io_extract_modeenc(&vmode, 0, Qnil, &oflags, &fmode, &convconfig);
	    enc = convconfig.enc2;
	}
    }
    ptr->enc = enc;
    if (WRITABLE(self)) {
	rb_enc_associate(ptr->string, enc);
    }

    return self;
}