Mercurial > octave
view src/display-available.c @ 21170:1edaf1ee65eb
maint: Replace some uses of goto in libinterp.
* ls-mat4.cc (read_mat_file_header): Replace "goto data_read_error" with
"return -1".
* ls-mat4.cc (read_mat_binary_data): Replace "goto data_read_error" with
direct call to error. Move variable declarations to point of usage.
* ls-mat5.cc (read_mat5_tag, write_mat5_tag): Replace "goto data_read_error"
with "return 1".
* ls-mat5.cc (save_mat5_binary_element): Replace "goto skip_to_next" with
"return true".
* ls-oct-binary.cc (read_binary_data): Replace "goto data_read_error" with
direct call to error.
* mex.cc (valid_key): Replace "goto done" with "return retval".
* rand.cc (do_rand): Clarify comment.
* pt-binop.cc (tree_binary_expression::rvalue1): Replace "goto done" with
"return octave_value (xxx)"
* pt-binop.cc (tree_boolean_expression::rvalue1): Replace "goto done" with
"return octave_value (xxx)"
author | Rik <rik@octave.org> |
---|---|
date | Mon, 01 Feb 2016 21:16:19 -0800 |
parents | 299fe39163a2 |
children | 40de9f8f23a6 |
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/* Copyright (C) 2012-2015 John W. Eaton This file is part of Octave. Octave is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. Octave is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with Octave; see the file COPYING. If not, see <http://www.gnu.org/licenses/>. */ #ifdef HAVE_CONFIG_H #include <config.h> #endif #include <stdlib.h> #if defined (OCTAVE_USE_WINDOWS_API) #include <windows.h> #elif defined (HAVE_FRAMEWORK_CARBON) #include <Carbon/Carbon.h> #elif defined (HAVE_X_WINDOWS) #include <X11/Xlib.h> #endif #include "display-available.h" const char * display_available (int *dpy_avail) { *dpy_avail = 0; const char *err_msg = ""; #if defined (OCTAVE_USE_WINDOWS_API) HDC hdc = GetDC (0); if (hdc) *dpy_avail = 1; else err_msg = "no graphical display found"; #elif defined (HAVE_FRAMEWORK_CARBON) CGDirectDisplayID display = CGMainDisplayID (); if (display) *dpy_avail = 1; else err_msg = "no graphical display found"; #elif defined (HAVE_X_WINDOWS) const char *display_name = getenv ("DISPLAY"); if (display_name && *display_name) { Display *display = XOpenDisplay (display_name); if (display) { Screen *screen = DefaultScreenOfDisplay (display); if (! screen) err_msg = "X11 display has no default screen"; XCloseDisplay (display); *dpy_avail = 1; } else err_msg = "unable to open X11 DISPLAY"; } else err_msg = "X11 DISPLAY environment variable not set"; #else err_msg = "no graphical display found"; #endif return err_msg; }