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Viewing changes to hald/util_pm.c

  • Committer: Bazaar Package Importer
  • Author(s): Martin Pitt
  • Date: 2007-10-23 12:33:58 UTC
  • Revision ID: james.westby@ubuntu.com-20071023123358-xaf8mjc5n84d5gtz
Tags: upstream-0.5.10
Import upstream version 0.5.10

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hald/util_pm.c
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/***************************************************************************
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 * CVSID: $Id$
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 *
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 * utili_pm.c - Various Powermanagement related utilities
 
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 * util_pm.c - Various power management related utilities that do not need
 
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 *             to use HalDevice. This is suitable to use in addons and probers.
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 *
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 * Copyright (C) 2005 Richard Hughes <richard@hughsie.com>
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 * Copyright (C) 2005 Danny Kukawka <danny.kukawka@web.de>
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            strcasecmp (type, "pbac") == 0) {
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                return "lead-acid";
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        }
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        if (strcasecmp (type, "lip") == 0) {
 
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        if (strcasecmp (type, "lip") == 0 ||
 
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            strcasecmp (type, "lipo") == 0) {
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                return "lithium-polymer";
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        }
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        if (strcasecmp (type, "nimh") == 0) {
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                return "nickel-metal-hydride";
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        }
 
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        if (strcasecmp (type, "lifo") == 0) {
 
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                return "lithium-iron-phosphate";
 
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        }
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        return "unknown";
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}
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/**  
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 *  util_compute_percentage_charge:
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 *  @id:                 Optional ID given to this battery. Unused at present.
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 *  @chargeLevel:        The current charge level of the battery (typically mWh)
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 *  @chargeLastFull:     The last "full" charge of the battery (typically mWh)
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 *  Returns:             Percentage, -1 if invalid
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 *
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 *  Given all the required parameters, this function will return the percentage
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 *  charge remaining. There are lots of checks here as ACPI is often broken.
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 */
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int 
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util_compute_percentage_charge (const char *id,
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                             int chargeLevel,
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                             int chargeLastFull)
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{
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        int percentage;
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        /* make sure we have chargelevel */
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        if (chargeLevel <= 0) {
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                HAL_WARNING (("chargeLevel %i, returning -1!", chargeLevel));
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                return -1;
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        }
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        /* make sure not division by zero */
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        if (chargeLastFull > 0)
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                percentage = ((double) chargeLevel / (double) chargeLastFull) * 100;
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        else {
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                HAL_WARNING (("chargeLastFull %i, percentage returning -1!", chargeLastFull));
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                return -1;
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        }
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        /* Some bios's will report this higher than 100, limit it here */
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        if (percentage > 100) {
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                HAL_WARNING (("Percentage %i, returning 100!", percentage));
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                return 100;
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        }
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        /* Something really isn't right if we get a negative... */
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        if (percentage < 0) {
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                HAL_WARNING (("Percentage %i, returning -1!", percentage));
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                return -1;
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        }
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        return percentage;
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}
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/**  
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 *  util_compute_time_remaining:
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 *  @id:                 Optional ID given to this battery. Unused at present.
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 *  @chargeRate:         The "rate" (typically mW)