/* $Id: cfg.c,v 1.47 2005/05/08 04:32:43 reinelt Exp $^ * * config file stuff * * Copyright (C) 1999, 2000 Michael Reinelt * Copyright (C) 2004 The LCD4Linux Team * * This file is part of LCD4Linux. * * LCD4Linux 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. * * LCD4Linux 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: cfg.c,v $ * Revision 1.47 2005/05/08 04:32:43 reinelt * CodingStyle added and applied * * Revision 1.46 2005/05/02 05:15:46 reinelt * make busy-flag checking configurable for LCD-Linux driver * * Revision 1.45 2005/01/18 06:30:21 reinelt * added (C) to all copyright statements * * Revision 1.44 2005/01/17 06:29:24 reinelt * added software-controlled backlight support to HD44780 * * Revision 1.43 2004/11/29 04:42:06 reinelt * removed the 99999 msec limit on widget update time (thanks to Petri Damsten) * * Revision 1.42 2004/06/26 12:04:59 reinelt * * uh-oh... the last CVS log message messed up things a lot... * * Revision 1.41 2004/06/26 09:27:20 reinelt * * added '-W' to CFLAGS * changed all C++ comments to C ones * cleaned up a lot of signed/unsigned mistakes * * Revision 1.40 2004/06/20 10:09:52 reinelt * * 'const'ified the whole source * * Revision 1.39 2004/03/11 06:39:58 reinelt * big patch from Martin: * - reuse filehandles * - memory leaks fixed * - earlier busy-flag checking with HD44780 * - reuse memory for strings in RESULT and hash * - netdev_fast to wavid time-consuming regex * * Revision 1.38 2004/03/08 16:26:26 reinelt * re-introduced \nnn (octal) characters in strings * text widgets can have a 'update' speed of 0 which means 'never' * (may be used for static content) * * Revision 1.37 2004/03/06 20:31:16 reinelt * Complete rewrite of the evaluator to get rid of the code * from mark Morley (because of license issues). * The new Evaluator does a pre-compile of expressions, and * stores them in trees. Therefore it should be reasonable faster... * * Revision 1.36 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 1.35 2004/03/01 04:29:51 reinelt * cfg_number() returns -1 on error, 0 if value not found (but default val used), * and 1 if value was used from the configuration. * HD44780 driver adopted to new cfg_number() * Crystalfontz 631 driver nearly finished * * Revision 1.34 2004/02/18 06:39:20 reinelt * T6963 driver for graphic displays finished * * Revision 1.33 2004/02/01 18:08:50 reinelt * removed strtok() from layout processing (took me hours to find this bug) * further strtok() removind should be done! * * Revision 1.32 2004/01/30 20:57:55 reinelt * HD44780 patch from Martin Hejl * dmalloc integrated * * Revision 1.31 2004/01/29 04:40:02 reinelt * every .c file includes "config.h" now * * Revision 1.30 2004/01/22 07:57:45 reinelt * several bugs fixed where segfaulting on layout>display * Crystalfontz driver optimized, 632 display already works * * Revision 1.29 2004/01/18 06:54:08 reinelt * bug in expr.c fixed (thanks to Xavier) * some progress with /proc/stat parsing * * Revision 1.28 2004/01/16 05:04:53 reinelt * started plugin proc_stat which should parse /proc/stat * which again is a paint in the a** * thinking over implementation methods of delta functions * (CPU load, ...) * * Revision 1.27 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 1.26 2004/01/11 18:26:02 reinelt * further widget and layout processing * * Revision 1.25 2004/01/11 09:26:15 reinelt * layout starts to exist... * * Revision 1.24 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 1.23 2004/01/09 04:16:06 reinelt * added 'section' argument to cfg_get(), but NULLed it on all calls by now. * * Revision 1.22 2004/01/08 06:00:28 reinelt * allowed '.' in key names * allowed empty section keys (not only "section anything {", but "anything {") * * Revision 1.21 2004/01/08 05:28:12 reinelt * Luk Claes added to AUTHORS * cfg: section handling ('{}') added * * Revision 1.20 2004/01/07 10:15:41 reinelt * small glitch in evaluator fixed * made config table sorted and access with bsearch(), * which should be much faster * * Revision 1.19 2003/12/19 05:35:14 reinelt * renamed 'client' to 'plugin' * * Revision 1.18 2003/10/11 06:01:52 reinelt * * renamed expression.{c,h} to client.{c,h} * added config file client * new functions 'AddNumericVariable()' and 'AddStringVariable()' * new parameter '-i' for interactive mode * * Revision 1.17 2003/10/05 17:58:50 reinelt * libtool junk; copyright messages cleaned up * * Revision 1.16 2003/09/09 06:54:43 reinelt * new function 'cfg_number()' * * Revision 1.15 2003/08/24 05:17:58 reinelt * liblcd4linux patch from Patrick Schemitz * * Revision 1.14 2003/08/14 03:47:40 reinelt * remove PID file if driver initialisation fails * * Revision 1.13 2003/02/22 07:53:10 reinelt * cfg_get(key,defval) * * Revision 1.12 2001/03/09 12:14:24 reinelt * * minor cleanups * * Revision 1.11 2001/03/08 15:25:38 ltoetsch * improved exec * * Revision 1.10 2001/03/07 18:10:21 ltoetsch * added e(x)ec commands * * Revision 1.9 2000/08/10 09:44:09 reinelt * * new debugging scheme: error(), info(), debug() * uses syslog if in daemon mode * * Revision 1.8 2000/07/31 06:46:35 reinelt * * eliminated some compiler warnings with glibc * * Revision 1.7 2000/04/15 11:13:54 reinelt * * added '-d' (debugging) switch * added several debugging messages * removed config entry 'Delay' for HD44780 driver * delay loop for HD44780 will be calibrated automatically * * Revision 1.6 2000/04/03 04:46:38 reinelt * * added '-c key=val' option * * Revision 1.5 2000/03/28 07:22:15 reinelt * * version 0.95 released * X11 driver up and running * minor bugs fixed * * Revision 1.4 2000/03/26 20:00:44 reinelt * * README.Raster added * * Revision 1.3 2000/03/26 19:03:52 reinelt * * more Pixmap renaming * quoting of '#' in config file * * Revision 1.2 2000/03/10 17:36:02 reinelt * * first unstable but running release * * Revision 1.1 2000/03/10 11:40:47 reinelt * *** empty log message *** * * Revision 1.3 2000/03/07 11:01:34 reinelt * * system.c cleanup * * Revision 1.2 2000/03/06 06:04:06 reinelt * * minor cleanups * */ /* * exported functions: * * cfg_init (source) * read configuration from source * returns 0 if successful * returns -1 in case of an error * * cfg_source (void) * returns the file the configuration was read from * * cfg_cmd (arg) * allows us to overwrite entries in the * config-file from the command line. * arg is 'key=value' * cfg_cmd can be called _before_ cfg_read() * returns 0 if ok, -1 if arg cannot be parsed * * cfg_list (section) * returns a list of all keys in the specified section * This list was allocated be cfg_list() and must be * freed by the caller! * * cfg_get_raw (section, key, defval) * return the a value for a given key in a given section * or if key does not exist. Does NOT evaluate * the expression. Therefore used to get the expression * itself! * * cfg_get (section, key, defval) * return the a value for a given key in a given section * or if key does not exist. The specified * value in the config is treated as a expression and * is evaluated! * * cfg_number (section, key, defval, min, int max, *value) * return the a value for a given key in a given section * convert it into a number with syntax checking * check if its in a given range. As it uses cfg_get() * internally, the evaluator is used here, too. * */ #include "config.h" #include #include #include #include #include #include #include #include "debug.h" #include "evaluator.h" 
/* $Id$
 * $URL$
 *
 * generic timer 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.
 *
 */

/* 
 * exported functions:
 *
 * int timer_add (void(*callback)(void *data), void *data, int interval, int one_shot);
 *   adds a timer to the queue
 *
 * int timer_process (struct timespec *delay);
 *   process timer queue
 *
 * void timer_exit();
 *   release all timers
 *
 */


#include "config.h"

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <sys/time.h>
#include <time.h>

#include "debug.h"
#include "cfg.h"
#include "timer.h"

#ifdef WITH_DMALLOC
#include <dmalloc.h>
#endif


typedef struct TIMER {
    void (*callback) (void *data);
    void *data;
    struct timeval when;
    int interval;
    int one_shot;
    int active;
} TIMER;


TIMER *Timers = NULL;
int nTimers = 0;


static void timer_inc(struct timeval *tv, const int msec)
{
    tv->tv_sec += msec / 1000;
    tv->tv_usec += (msec - 1000 * (msec / 1000)) * 1000;

    if (tv->tv_usec >= 1000000) {
	tv->tv_usec -= 1000000;
	tv->tv_sec++;
    }
}


int timer_add(void (*callback) (void *data), void *data, const int interval, const int one_shot)
{
    int i;
    struct timeval now;

    /* find a free slot */
    for (i = 0; i < nTimers; i++) {
	if (Timers[i].active == 0)
	    break;
    }

    /* none found, allocate a new slot */
    if (i >= nTimers) {
	nTimers++;
	Timers = realloc(Timers, nTimers * sizeof(*Timers));
    }

    gettimeofday(&now, NULL);

    /* fill slot */
    Timers[i].callback = callback;
    Timers[i].data = data;
    Timers[i].when = now;
    Timers[i].interval = interval;
    Timers[i].one_shot = one_shot;
    Timers[i].active = 1;

    /* if one-shot timer, don't fire now */
    if (one_shot) {
	timer_inc(&Timers[i].when, interval);
    }

    return 0;
}


int timer_process(struct timespec *delay)
{
    int i, flag, min;
    struct timeval now;

    /* the current moment */
    gettimeofday(&now, NULL);

    /* sanity check */
    if (nTimers == 0) {
	error("huh? not one single timer to process? dazed and confused...");
	return -1;
    }

    /* process expired timers */
    flag = 0;
    for (i = 0; i < nTimers; i++) {
	if (Timers[i].active == 0)
	    continue;
	if (timercmp(&Timers[i].when, &now, <=)) {
	    flag = 1;
	    /* callback */
	    if (Timers[i].callback != NULL) {
		Timers[i].callback(Timers[i].data);
	    }
	    /* respawn or delete timer */
	    if (Timers[i].one_shot) {
		Timers[i].active = 0;
	    } else {
		Timers[i].when = now;
		timer_inc(&Timers[i].when, Timers[i].interval);
	    }
	}
    }

    /* find next timer */
    flag = 1;
    min = -1;
    for (i = 0; i < nTimers; i++) {
	if (Timers[i].active == 0)
	    continue;
	if (flag || timercmp(&Timers[i].when, &Timers[min].when, <)) {
	    flag = 0;
	    min = i;
	}
    }

    if (min < 0) {
	error("huh? not one single timer left? dazed and confused...");
	return -1;
    }

    /* delay until next timer event */
    delay->tv_sec = Timers[min].when.tv_sec - now.tv_sec;
    delay->tv_nsec = Timers[min].when.tv_usec - now.tv_usec;
    if (delay->tv_nsec < 0) {
	delay->tv_sec--;
	delay->tv_nsec += 1000000;
    }
    /* nanoseconds!! */
    delay->tv_nsec *= 1000;

    return 0;

}


void timer_exit(void)
{

    nTimers = 0;

    if (Timers != NULL) {
	free(Timers);;
	Timers = NULL;
    }
}
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