testpower.c

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Author : Philipp Wiesemann
Date : 2015-06-21 17:33:46
Hash : 0e45984f
Message : Fixed crash if initialization of EGL failed but was tried again later. The internal function SDL_EGL_LoadLibrary() did not delete and remove a mostly uninitialized data structure if loading the library first failed. A later try to use EGL then skipped initialization and assumed it was previously successful because the data structure now already existed. This led to at least one crash in the internal function SDL_EGL_ChooseConfig() because a NULL pointer was dereferenced to make a call to eglBindAPI().

test/testpower.c

/*
  Copyright (C) 1997-2015 Sam Lantinga <slouken@libsdl.org>

  This software is provided 'as-is', without any express or implied
  warranty.  In no event will the authors be held liable for any damages
  arising from the use of this software.

  Permission is granted to anyone to use this software for any purpose,
  including commercial applications, and to alter it and redistribute it
  freely.
*/
/* Simple test of power subsystem. */

#include <stdio.h>
#include "SDL.h"

static void
report_power(void)
{
    int seconds, percent;
    const SDL_PowerState state = SDL_GetPowerInfo(&seconds, &percent);
    char *statestr = NULL;

    SDL_Log("SDL-reported power info...\n");
    switch (state) {
    case SDL_POWERSTATE_UNKNOWN:
        statestr = "Unknown";
        break;
    case SDL_POWERSTATE_ON_BATTERY:
        statestr = "On battery";
        break;
    case SDL_POWERSTATE_NO_BATTERY:
        statestr = "No battery";
        break;
    case SDL_POWERSTATE_CHARGING:
        statestr = "Charging";
        break;
    case SDL_POWERSTATE_CHARGED:
        statestr = "Charged";
        break;
    default:
        statestr = "!!API ERROR!!";
        break;
    }

    SDL_Log("State: %s\n", statestr);

    if (percent == -1) {
        SDL_Log("Percent left: unknown\n");
    } else {
        SDL_Log("Percent left: %d%%\n", percent);
    }

    if (seconds == -1) {
        SDL_Log("Time left: unknown\n");
    } else {
        SDL_Log("Time left: %d minutes, %d seconds\n", (int) (seconds / 60),
               (int) (seconds % 60));
    }
}


int
main(int argc, char *argv[])
{
    /* Enable standard application logging */
    SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);

    if (SDL_Init(0) == -1) {
        SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "SDL_Init() failed: %s\n", SDL_GetError());
        return 1;
    }

    report_power();

    SDL_Quit();
    return 0;
}

/* end of testpower.c ... */

kc3-lang/SDL/test/testpower.c

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kc3-lang/SDL /test/testpower.c