Class: IO

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

Instance Method Summary collapse

Instance Method Details

#readv(iov) ⇒ Object 



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# File 'ext/vio/vio.c', line 88

static VALUE
vio_read(VALUE io, VALUE iov)
{
    int fd, i, size, bytes_read, cnt;
    int expected = 0;
    struct iovec iovs[IOV_MAX];
    VALUE results;
    declare_fptr;
    if (RARRAY_LEN(iov) == 0) vio_error("No buffer offsets given");
    GetOpenFile(io, fptr);
    rb_io_check_readable(fptr);
    declare_fd;
    /* XXX Todo: Error handling */
    lseek(fd, 0L, SEEK_SET);
    fptr->lineno = 0;
    cnt = RARRAY_LEN(iov);
    results = rb_ary_new2(cnt);
    for (i=0; i < cnt; i++) {
      VALUE size_el = RARRAY_PTR(iov)[i];
      Check_Type(size_el, T_FIXNUM);
      size = FIX2INT(size_el);
      expected = expected + size;
      iovs[i].iov_len = size;
      iovs[i].iov_base = calloc(1,size);
    }
    retry:
      TRAP_BEG;
      bytes_read = readv(fd,iovs,cnt);
      TRAP_END;
    if (bytes_read < expected && bytes_read > 0) goto retry;
    vio_read_error();
    for (i=0; i < cnt; i++) {
      rb_ary_push(results, rb_tainted_str_new((char *)iovs[i].iov_base, iovs[i].iov_len));
    }
    return results;
}

#writev(iov) ⇒ Object 



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# File 'ext/vio/vio.c', line 125

static VALUE
vio_write(VALUE io, VALUE iov)
{
    int i, size, bytes_written, fd, cnt;
    int expected = 0;
    VALUE results;
    struct iovec iovs[IOV_MAX];
    declare_fptr;
    Check_Type(iov, T_ARRAY);
    cnt = RARRAY_LEN(iov);
    if (cnt == 0) vio_error("No buffers to write given");
    GetOpenFile(io, fptr);
    rb_io_check_writable(fptr);
    declare_fd;
    results = rb_ary_new2(cnt);
    for (i=0; i < cnt; i++) {
      VALUE str = RARRAY_PTR(iov)[i];
      Check_Type(str, T_STRING);
      size = RSTRING_LEN(str);
      expected = expected + size;
      iovs[i].iov_len = size;
      iovs[i].iov_base = RSTRING_PTR(str);
    }
    retry:
      TRAP_BEG;
      bytes_written = writev(fd,iovs,cnt);
      TRAP_END;
    if (bytes_written < expected && bytes_written > 0) goto retry;
    vio_write_error();
    for (i=0; i < cnt; i++) {
      rb_ary_push(results, INT2FIX(iovs[i].iov_len));
    }
    return results;
}