C++ (Cpp) rb_io_get_write_io Examples

Example #1

File: yaramc.c Project: simulacre/Yaram

/*
 *  call-seq:
 *     #write_unblocked(string)   -> integer
 *
 *  Writes the given string to <em>ios</em> using
 *  the write(2) system call. It assumes that O_NONBLOCK 
 *  is already set for the underlying file descriptor.
 *
 *  Over ~100,000 calls it is about 0.043 seconds faster.
 *
 *  It returns the number of bytes written.
 */
static VALUE
rb_yaram_mbox_write_unblocked(VALUE self, VALUE io, VALUE str)
{
    rb_io_t *fptr;
    long n;

    rb_secure(4);
    if (TYPE(str) != T_STRING)
	    str = rb_obj_as_string(str);

    io = rb_io_get_write_io(io);
    GetOpenFile(io, fptr);
    rb_io_check_writable(fptr);

    if (io_fflush(fptr) < 0)
        rb_sys_fail(0);

    n = write(fptr->fd, RSTRING_PTR(str), RSTRING_LEN(str));

    if (n == -1) {
        if (errno == EWOULDBLOCK || errno == EAGAIN)
            rb_mod_sys_fail(rb_mWaitWritable, "write would block");
        rb_sys_fail_path(fptr->pathv);
    }

    return LONG2FIX(n);
}

Example #2

File: console.c Project: DashYang/sim

/*
 * call-seq:
 *   io.getpass(prompt=nil)       -> string
 *
 * Reads and returns a line without echo back.
 * Prints +prompt+ unless it is +nil+.
 *
 * You must require 'io/console' to use this method.
 */
static VALUE
console_getpass(int argc, VALUE *argv, VALUE io)
{
    VALUE str, wio;

    rb_check_arity(argc, 0, 1);
    wio = rb_io_get_write_io(io);
    if (wio == io && io == rb_stdin) wio = rb_stderr;
    prompt(argc, argv, wio);
    str = rb_ensure(getpass_call, io, puts_call, wio);
    return str_chomp(str);
}