/*
 * fontconfig/src/fcinit.c
 *
 * Copyright © 2001 Keith Packard
 *
 * Permission to use, copy, modify, distribute, and sell this software and its
 * documentation for any purpose is hereby granted without fee, provided that
 * the above copyright notice appear in all copies and that both that
 * copyright notice and this permission notice appear in supporting
 * documentation, and that the name of the author(s) not be used in
 * advertising or publicity pertaining to distribution of the software without
 * specific, written prior permission.  The authors make no
 * representations about the suitability of this software for any purpose.  It
 * is provided "as is" without express or implied warranty.
 *
 * THE AUTHOR(S) DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
 * EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY SPECIAL, INDIRECT OR
 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 * PERFORMANCE OF THIS SOFTWARE.
 */

#include "fcint.h"
#include <stdlib.h>

#if defined(FC_ATOMIC_INT_NIL)
#pragma message("Could not find any system to define atomic_int macros, library may NOT be thread-safe.")
#endif
#if defined(FC_MUTEX_IMPL_NIL)
#pragma message("Could not find any system to define mutex macros, library may NOT be thread-safe.")
#endif
#if defined(FC_ATOMIC_INT_NIL) || defined(FC_MUTEX_IMPL_NIL)
#pragma message("To suppress these warnings, define FC_NO_MT.")
#endif

static FcConfig *
FcInitFallbackConfig (const FcChar8 *sysroot)
{
    FcConfig	*config;

    config = FcConfigCreate ();
    if (!config)
	goto bail0;
    FcConfigSetSysRoot (config, sysroot);
    if (!FcConfigAddDir (config, (FcChar8 *) FC_DEFAULT_FONTS))
	goto bail1;
    if (!FcConfigAddCacheDir (config, (FcChar8 *) FC_CACHEDIR))
	goto bail1;
    return config;

bail1:
    FcConfigDestroy (config);
bail0:
    return 0;
}

int
FcGetVersion (void)
{
    return FC_VERSION;
}

/*
 * Load the configuration files
 */
FcConfig *
FcInitLoadOwnConfig (FcConfig *config)
{
    if (!config)
    {
	config = FcConfigCreate ();
	if (!config)
	    return NULL;
    }

    FcInitDebug ();

    if (!FcConfigParseAndLoad (config, 0, FcTrue))
    {
	const FcChar8 *sysroot = FcConfigGetSysRoot (config);
	FcConfig *fallback = FcInitFallbackConfig (sysroot);

	FcConfigDestroy (config);

	return fallback;
    }

    if (config->cacheDirs && config->cacheDirs->num == 0)
    {
	FcChar8 *prefix, *p;
	size_t plen;

	fprintf (stderr,
		 "Fontconfig warning: no <cachedir> elements found. Check configuration.\n");
	fprintf (stderr,
		 "Fontconfig warning: adding <cachedir>%s</cachedir>\n",
		 FC_CACHEDIR);
	prefix = FcConfigXdgCacheHome ();
	if (!prefix)
	    goto bail;
	plen = strlen ((const char *)prefix);
	p = realloc (prefix, plen + 12);
	if (!p)
	    goto bail;
	prefix = p;
	memcpy (&prefix[plen], FC_DIR_SEPARATOR_S "fontconfig", 11);
	prefix[plen + 11] = 0;
	fprintf (stderr,
		 "Fontconfig warning: adding <cachedir prefix=\"xdg\">fontconfig</cachedir>\n");

	if (!FcConfigAddCacheDir (config, (FcChar8 *) FC_CACHEDIR) ||
	    !FcConfigAddCacheDir (config, (FcChar8 *) prefix))
	{
	    FcConfig *fallback;
	    const FcChar8 *sysroot;

	  bail:
	    sysroot = FcConfigGetSysRoot (config);
	    fprintf (stderr,
		     "Fontconfig error: out of memory");
	    if (prefix)
		FcStrFree (prefix);
	    fallback = FcInitFallbackConfig (sysroot);
	    FcConfigDestroy (config);

	    return fallback;
	}
	FcStrFree (prefix);
    }

    return config;
}

FcConfig *
FcInitLoadConfig (void)
{
    return FcInitLoadOwnConfig (NULL);
}

/*
 * Load the configuration files and scan for available fonts
 */
FcConfig *
FcInitLoadOwnConfigAndFonts (FcConfig *config)
{
    config = FcInitLoadOwnConfig (config);
    if (!config)
	return 0;
    if (!FcConfigBuildFonts (config))
    {
	FcConfigDestroy (config);
	return 0;
    }
    return config;
}

FcConfig *
FcInitLoadConfigAndFonts (void)
{
    return FcInitLoadOwnConfigAndFonts (NULL);
}

/*
 * Initialize the default library configuration
 */
FcBool
FcInit (void)
{
    return FcConfigInit ();
}

/*
 * Free all library-allocated data structures.
 */
void
FcFini (void)
{
    FcConfigFini ();
    FcCacheFini ();
    FcDefaultFini ();
}

/*
 * Reread the configuration and available font lists
 */
FcBool
FcInitReinitialize (void)
{
    FcConfig	*config;
    FcBool	ret;

    config = FcInitLoadConfigAndFonts ();
    if (!config)
	return FcFalse;
    ret = FcConfigSetCurrent (config);
    /* FcConfigSetCurrent() increases the refcount.
     * decrease it here to avoid the memory leak.
     */
    FcConfigDestroy (config);

    return ret;
}

FcBool
FcInitBringUptoDate (void)
{
    FcConfig	*config = FcConfigGetCurrent ();
    time_t	now;

    /*
     * rescanInterval == 0 disables automatic up to date
     */
    if (config->rescanInterval == 0)
	return FcTrue;
    /*
     * Check no more often than rescanInterval seconds
     */
    now = time (0);
    if (config->rescanTime + config->rescanInterval - now > 0)
	return FcTrue;
    /*
     * If up to date, don't reload configuration
     */
    if (FcConfigUptoDate (0))
	return FcTrue;
    return FcInitReinitialize ();
}

#define __fcinit__
#include "fcaliastail.h"
#undef __fcinit__