linux-dvb-apps.git - linux-dvb-apps Debian packaging

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/* $Id: widget.c,v 1.19 2005/05/08 04:32:45 reinelt Exp $ * * generic widget handling * * Copyright (C) 2003, 2004 Michael Reinelt <reinelt@eunet.at> * Copyright (C) 2004 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net> * * This program 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 2, or (at your option) * any later version. * * This program 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 this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * * * $Log: widget.c,v $ * Revision 1.19 2005/05/08 04:32:45 reinelt * CodingStyle added and applied * * Revision 1.18 2005/01/18 06:30:24 reinelt * added (C) to all copyright statements * * Revision 1.17 2004/06/26 12:05:00 reinelt * * uh-oh... the last CVS log message messed up things a lot... * * Revision 1.16 2004/06/26 09:27:21 reinelt * * added '-W' to CFLAGS * changed all C++ comments to C ones * cleaned up a lot of signed/unsigned mistakes * * Revision 1.15 2004/06/20 10:09:56 reinelt * * 'const'ified the whole source * * Revision 1.14 2004/05/26 11:37:36 reinelt * * Curses driver ported. * * Revision 1.13 2004/03/03 03:47:04 reinelt * big patch from Martin Hejl: * - use qprintf() where appropriate * - save CPU cycles on gettimeofday() * - add quit() functions to free allocated memory * - fixed lots of memory leaks * * Revision 1.12 2004/02/18 06:39:20 reinelt * T6963 driver for graphic displays finished * * Revision 1.11 2004/01/30 20:57:56 reinelt * HD44780 patch from Martin Hejl * dmalloc integrated * * Revision 1.10 2004/01/29 04:40:03 reinelt * every .c file includes "config.h" now * * Revision 1.9 2004/01/23 04:53:57 reinelt * icon widget added (not finished yet!) * * Revision 1.8 2004/01/14 11:33:00 reinelt * new plugin 'uname' which does what it's called * text widget nearly finished * first results displayed on MatrixOrbital * * Revision 1.7 2004/01/13 08:18:20 reinelt * timer queues added * liblcd4linux deactivated turing transformation to new layout * * Revision 1.6 2004/01/11 18:26:02 reinelt * further widget and layout processing * * Revision 1.5 2004/01/11 09:26:15 reinelt * layout starts to exist... * * Revision 1.4 2004/01/10 20:22:33 reinelt * added new function 'cfg_list()' (not finished yet) * added layout.c (will replace processor.c someday) * added widget_text.c (will be the first and most important widget) * modified lcd4linux.c so that old-style configs should work, too * * Revision 1.3 2004/01/10 17:34:40 reinelt * further matrixOrbital changes * widgets initialized * * Revision 1.2 2003/10/05 17:58:50 reinelt * libtool junk; copyright messages cleaned up * * Revision 1.1 2003/09/19 03:51:29 reinelt * minor fixes, widget.c added * */ /* * exported functions: * * int widget_junk(void) * does something * */ #include "config.h" #include <stdlib.h> #include <stdio.h> #include <string.h> #include <errno.h> #include "debug.h" #include "cfg.h" #include "widget.h" #ifdef WITH_DMALLOC #include <dmalloc.h> #endif /* we use a static array of widgets and not realloc() */ #define MAX_WIDGETS 256 static WIDGET_CLASS *Classes = NULL; static int nClasses = 0; static WIDGET *Widgets = NULL; static int nWidgets = 0; static int widget_added = 0; int widget_register(WIDGET_CLASS * widget) { int i; /* sanity check: disallow widget registering after at least one */ /* widget has been added, because we use realloc here, and there may */ /* be pointers to the old memory area */ if (widget_added) { error("internal error: register_widget(%s) after add_widget()", widget->name); return -1; } for (i = 0; i < nClasses; i++) { if (strcasecmp(widget->name, Classes[i].name) == 0) { error("internal error: widget '%s' already exists!", widget->name); return -1; } } nClasses++; Classes = realloc(Classes, nClasses * sizeof(WIDGET_CLASS)); Classes[nClasses - 1] = *widget; return 0; } void widget_unregister(void) { int i; for (i = 0; i < nWidgets; i++) { Widgets[i].class->quit(&(Widgets[i])); } free(Widgets); free(Classes); nWidgets = 0; nClasses = 0; } int widget_add(const char *name, const int row, const int col) { int i; char *section; char *class; WIDGET_CLASS *Class; WIDGET *Widget; /* prepare config section */ /* strlen("Widget:")=7 */ section = malloc(strlen(name) + 8); strcpy(section, "Widget:"); strcat(section, name); /* get widget class */ class = cfg_get(section, "class", NULL); if (class == NULL || *class == '\0') { error("error: widget '%s' has no class!", name); if (class) free(class); return -1; } free(section); /* lookup widget class */ Class = NULL; for (i = 0; i < nClasses; i++) { if (strcasecmp(class, Classes[i].name) == 0) { Class = &(Classes[i]); break; } } if (i == nClasses) { error("widget '%s': class '%s' not supported", name, class); if (class) free(class); return -1; } if (class) free(class); /* do NOT use realloc here because there may be pointers to the old */ /* memory area, which would point to nowhere if realloc moves the area */ if (Widgets == NULL) { Widgets = malloc(MAX_WIDGETS * sizeof(WIDGET)); if (Widgets == NULL) { error("internal error: allocation of widget buffer failed: %s", strerror(errno)); return -1; } } /* another sanity check */ if (nWidgets >= MAX_WIDGETS) { error("internal error: widget buffer full!"); return -1; } Widget = &(Widgets[nWidgets]); nWidgets++; Widget->name = (char *) name; Widget->class = Class; Widget->row = row; Widget->col = col; if (Class->init != 0) { Class->init(Widget); } return 0; }


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