method

peek

v1_8_7_72 - Show latest stable - 0 notes - Class: StringScanner

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1_8_7_72 (0)
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1_9_1_378 (-38)
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peek(p1) public

Extracts a string corresponding to string[pos,len], without advancing the scan pointer.

  s = StringScanner.new('test string')
  s.peek(7)          # => "test st"
  s.peek(7)          # => "test st"

Show source

/*
 * call-seq: peek(len)
 *
 * Extracts a string corresponding to <tt>string[pos,len]</tt>, without
 * advancing the scan pointer.
 *
 *   s = StringScanner.new('test string')
 *   s.peek(7)          # => "test st"
 *   s.peek(7)          # => "test st"
 *
 */
static VALUE
strscan_peek(VALUE self, VALUE vlen)
{
    struct strscanner *p;
    long len;

    GET_SCANNER(self, p);
    len = NUM2LONG(vlen);
    if (EOS_P(p)) {
        return infect(rb_str_new("", 0), p);
    }
    if (p->curr + len > S_LEN(p)) {
        len = S_LEN(p) - p->curr;
    }
    return extract_beg_len(p, p->curr, len);
}

peek

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