Class: IO

Inherits:
Object
  • Object
show all
Defined in:
(unknown)

Constant Summary collapse

IOV_MAX = 
rb_IOV_MAX

Instance Method Summary collapse

Instance Method Details

#writev(list) ⇒ Object 



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# File 'ext/writev/writev.c', line 17

static VALUE rb_writev(VALUE io, VALUE list)
{
    rb_io_t * fptr;
    struct iovec * iov;
    long i;
    ssize_t written;
    VALUE tmp;

    Check_Type(list, T_ARRAY);
#ifdef IOV_MAX
    if(RARRAY_LEN(list) > IOV_MAX)
#else
    if(RARRAY_LEN(list) > NUM2INT(rb_IOV_MAX))
#endif
	rb_raise(rb_eArgError, "list is too long");

    tmp = rb_io_check_io(io);
    GetOpenFile(tmp, fptr);
    rb_io_check_writable(fptr);

    iov = xcalloc(RARRAY_LEN(list), sizeof(struct iovec));

    for(i = 0; i < RARRAY_LEN(list); i++) {
	VALUE string = rb_ary_entry(list, i);
	iov[i].iov_base = StringValuePtr(string);
	iov[i].iov_len = RSTRING_LEN(string);
    }

    if((written = writev(fptr->fd, iov, (int)RARRAY_LEN(list))) == -1)
	rb_sys_fail_path(fptr->pathv);

    xfree(iov);

    return LONG2FIX(written);
}