source/libs/cairo/cairo-src/src/cairo-error.c

   1 /* -*- Mode: c; c-basic-offset: 4; indent-tabs-mode: t; tab-width: 8; -*- */
   2 /* cairo - a vector graphics library with display and print output
   3  *
   4  * Copyright © 2002 University of Southern California
   5  * Copyright © 2005 Red Hat, Inc.
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it either under the terms of the GNU Lesser General Public
   9  * License version 2.1 as published by the Free Software Foundation
  10  * (the "LGPL") or, at your option, under the terms of the Mozilla
  11  * Public License Version 1.1 (the "MPL"). If you do not alter this
  12  * notice, a recipient may use your version of this file under either
  13  * the MPL or the LGPL.
  14  *
  15  * You should have received a copy of the LGPL along with this library
  16  * in the file COPYING-LGPL-2.1; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA
  18  * You should have received a copy of the MPL along with this library
  19  * in the file COPYING-MPL-1.1
  20  *
  21  * The contents of this file are subject to the Mozilla Public License
  22  * Version 1.1 (the "License"); you may not use this file except in
  23  * compliance with the License. You may obtain a copy of the License at
  24  * http://www.mozilla.org/MPL/
  25  *
  26  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
  27  * OF ANY KIND, either express or implied. See the LGPL or the MPL for
  28  * the specific language governing rights and limitations.
  29  *
  30  * The Original Code is the cairo graphics library.
  31  *
  32  * The Initial Developer of the Original Code is University of Southern
  33  * California.
  34  *
  35  * Contributor(s):
  36  *      Carl D. Worth <cworth@cworth.org>
  37  */
  38
  39 #include "cairoint.h"
  40 #include "cairo-private.h"
  41
  42 #include "cairo-compiler-private.h"
  43 #include "cairo-error-private.h"
  44
  45 #include <assert.h>
  46
  47 /**
  48  * _cairo_error:
  49  * @status: a status value indicating an error, (eg. not
  50  * %CAIRO_STATUS_SUCCESS)
  51  *
  52  * Checks that status is an error status, but does nothing else.
  53  *
  54  * All assignments of an error status to any user-visible object
  55  * within the cairo application should result in a call to
  56  * _cairo_error().
  57  *
  58  * The purpose of this function is to allow the user to set a
  59  * breakpoint in _cairo_error() to generate a stack trace for when the
  60  * user causes cairo to detect an error.
  61  *
  62  * Return value: the error status.
  63  **/
  64 cairo_status_t
  65 _cairo_error (cairo_status_t status)
  66 {
  67     CAIRO_ENSURE_UNIQUE;
  68     assert (_cairo_status_is_error (status));
  69
  70     return status;
  71 }
  72
  73 COMPILE_TIME_ASSERT ((int)CAIRO_INT_STATUS_LAST_STATUS == (int)CAIRO_STATUS_LAST_STATUS);