Method: StringIO#truncate

Defined in:
ext/stringio/stringio.c

#truncate(integer) ⇒ 0

Truncates the buffer string to at most integer bytes. The stream must be opened for writing.

Returns:

  • (0) 


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# File 'ext/stringio/stringio.c', line 1717

static VALUE
strio_truncate(VALUE self, VALUE len)
{
    VALUE string = writable(self)->string;
    long l = NUM2LONG(len);
    long plen = RSTRING_LEN(string);
    if (l < 0) {
  error_inval("negative length");
    }
    rb_str_resize(string, l);
    if (plen < l) {
  MEMZERO(RSTRING_PTR(string) + plen, char, l - plen);
    }
    return INT2FIX(0);
}