StringScanner#getch

getch

static VALUE
strscan_getch(VALUE self)
{
    struct strscanner *p;
    long len;

    GET_SCANNER(self, p);
    CLEAR_MATCH_STATUS(p);
    if (EOS_P(p))
        return Qnil;

    len = rb_enc_mbclen(CURPTR(p), S_PEND(p), rb_enc_get(p->str));
    len = minl(len, S_RESTLEN(p));
    p->prev = p->curr;
    p->curr += len;
    MATCHED(p);
    adjust_registers_to_matched(p);
    return extract_range(p,
                         adjust_register_position(p, p->regs.beg[0]),
                         adjust_register_position(p, p->regs.end[0]));
}

Scans one character and returns it. This method is multibyte character sensitive.

Example

s = StringScanner.new("ab")
s.getch           # => "a"
s.getch           # => "b"
s.getch           # => nil

s = StringScanner.new("\244\242".force_encoding("euc-jp"))
s.getch           # => "\x{A4A2}"   # Japanese hira-kana "A" in EUC-JP
s.getch           # => nil

See also #getbyte #initialize_copy #get_byte #inspect also in 4.1 · 4.0 · 3.4 · 3.2 · 3.1 · 3.0

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