fbconf_xorg/xf86/read.c

/*
 *
 * Copyright (c) 1997  Metro Link Incorporated
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
 * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 * Except as contained in this notice, the name of the Metro Link shall not be
 * used in advertising or otherwise to promote the sale, use or other dealings
 * in this Software without prior written authorization from Metro Link.
 *
 */
/*
 * Copyright (c) 1997-2003 by The XFree86 Project, Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 *
 * Except as contained in this notice, the name of the copyright holder(s)
 * and author(s) shall not be used in advertising or otherwise to promote
 * the sale, use or other dealings in this Software without prior written
 * authorization from the copyright holder(s) and author(s).
 */


/* View/edit this file with tab stops set to 4 */

#ifdef HAVE_XORG_CONFIG_H
#include <xorg-config.h>
#endif

#include "xf86Parser.h"
#include "xf86tokens.h"
#include "Configint.h"

extern LexRec val;

static xf86ConfigSymTabRec TopLevelTab[] =
{
    {SECTION, "section"},
    {-1, ""},
};


/*
 * xf86parseConfigFile()
 *
 *    Parse a configuration file, appending it to the current
 *    configuration data.
 */

#define CLEANUP xf86freeConfig

static
XF86ConfigPtr
xf86parseConfigFile(XF86ConfigPtr ptr)
{
    int     token;      /* Scanner token code */

    while ((token = xf86getToken (TopLevelTab)) != EOF_TOKEN)
    {
        switch (token)
        {
        case COMMENT:
            ptr->conf_comment = xf86addComment(ptr->conf_comment, val.str);
            break;
        case SECTION:
            if (xf86getSubToken (&(ptr->conf_comment)) != STRING)
            {
                xf86parseError (QUOTE_MSG, "Section");
                CLEANUP (ptr);
                return (NULL);
            }
            xf86setSection (val.str);
            if (xf86nameCompare (val.str, "files") == 0)
            {
                xf86conffree(val.str);
                val.str = NULL;
                HANDLE_RETURN (conf_files, xf86parseFilesSection ());
            }
            else if (xf86nameCompare (val.str, "serverflags") == 0)
            {
                xf86conffree(val.str);
                val.str = NULL;
                HANDLE_RETURN (conf_flags, xf86parseFlagsSection ());
            }
            else if (xf86nameCompare (val.str, "keyboard") == 0)
            {
                xf86conffree(val.str);
                val.str = NULL;
                HANDLE_LIST (conf_input_lst, xf86parseKeyboardSection,
                             XF86ConfInputPtr);
            }
            else if (xf86nameCompare (val.str, "pointer") == 0)
            {
                xf86conffree(val.str);
                val.str = NULL;
                HANDLE_LIST (conf_input_lst, xf86parsePointerSection,
                             XF86ConfInputPtr);
            }
            else if (xf86nameCompare (val.str, "videoadaptor") == 0)
            {
                xf86conffree(val.str);
                val.str = NULL;
                HANDLE_LIST (conf_videoadaptor_lst, xf86parseVideoAdaptorSection,
                             XF86ConfVideoAdaptorPtr);
            }
            else if (xf86nameCompare (val.str, "device") == 0)
            {
                xf86conffree(val.str);
                val.str = NULL;
                HANDLE_LIST (conf_device_lst, xf86parseDeviceSection,
                             XF86ConfDevicePtr);
            }
            else if (xf86nameCompare (val.str, "monitor") == 0)
            {
                xf86conffree(val.str);
                val.str = NULL;
                HANDLE_LIST (conf_monitor_lst, xf86parseMonitorSection,
                             XF86ConfMonitorPtr);
            }
            else if (xf86nameCompare (val.str, "modes") == 0)
            {
                xf86conffree(val.str);
                val.str = NULL;
                HANDLE_LIST (conf_modes_lst, xf86parseModesSection,
                             XF86ConfModesPtr);
            }
            else if (xf86nameCompare (val.str, "screen") == 0)
            {
                xf86conffree(val.str);
                val.str = NULL;
                HANDLE_LIST (conf_screen_lst, xf86parseScreenSection,
                             XF86ConfScreenPtr);
            }
            else if (xf86nameCompare(val.str, "inputdevice") == 0)
            {
                xf86conffree(val.str);
                val.str = NULL;
                HANDLE_LIST (conf_input_lst, xf86parseInputSection,
                             XF86ConfInputPtr);
            }
            else if (xf86nameCompare (val.str, "module") == 0)
            {
                xf86conffree(val.str);
                val.str = NULL;
                HANDLE_RETURN (conf_modules, xf86parseModuleSection ());
            }
            else if (xf86nameCompare (val.str, "serverlayout") == 0)
            {
                xf86conffree(val.str);
                val.str = NULL;
                HANDLE_LIST (conf_layout_lst, xf86parseLayoutSection,
                             XF86ConfLayoutPtr);
            }
            else if (xf86nameCompare (val.str, "vendor") == 0)
            {
                xf86conffree(val.str);
                val.str = NULL;
                HANDLE_LIST (conf_vendor_lst, xf86parseVendorSection,
                             XF86ConfVendorPtr);
            }
            else if (xf86nameCompare (val.str, "dri") == 0)
            {
                xf86conffree(val.str);
                val.str = NULL;
                HANDLE_RETURN (conf_dri, xf86parseDRISection ());
            }
            else if (xf86nameCompare (val.str, "extensions") == 0)
            {
                xf86conffree(val.str);
                val.str = NULL;
                HANDLE_RETURN (conf_extensions, xf86parseExtensionsSection ());
            }
            else
            {
                Error (INVALID_SECTION_MSG, xf86tokenString ());
                xf86conffree(val.str);
                val.str = NULL;
            }
            break;
        default:
            Error (INVALID_KEYWORD_MSG, xf86tokenString ());
            xf86conffree(val.str);
            val.str = NULL;
        }
    }

    return (ptr);
}


/*
 * xf86readConfigFile()
 *
 *    Read and validate the (initial) configuration file.
 */

XF86ConfigPtr
xf86readConfigFile(void)
{
    XF86ConfigPtr   ptr;

    if ((ptr = xf86confcalloc (1, sizeof (XF86ConfigRec))) == NULL)
    {
        return (NULL);
    }
    memset(ptr, 0, sizeof (XF86ConfigRec)); /* Redundant */

    /*
     * Read, parse, and validate the configuration
     */
    ptr = xf86parseConfigFile(ptr);
    if (ptr != NULL) {
        if (!xf86validateConfig(ptr)) {
            CLEANUP(ptr);
            ptr = NULL;
        }
    }

    return (ptr);
}

#if defined(SMI_FBCONFIG)

/*
 * xf86readNextConfigFile()
 *
 *    Read an additional configuration file, appending it to the current
 *    configuration data.
 *
 *    Note that we can't revalidate existing configuration data without
 *    the possibility of memory leaks involving Screen sections.  For
 *    our purposes, additional configuration files are expected to
 *    contain only Modes sections, so revalidation isn't a big concern.
 */

XF86ConfigPtr
xf86readNextConfigFile(XF86ConfigPtr ptr)
{

    ptr = xf86parseConfigFile(ptr);
    if (ptr != NULL) {
        if (!xf86validateDevice(ptr) ||
#if (0)
                !xf86validateScreen(ptr) ||
#endif
                !xf86validateInput(ptr) ||
                !xf86validateLayout(ptr)) {
            CLEANUP(ptr);
            ptr = NULL;
        }
    }
    return (ptr);
}

#endif
#undef CLEANUP


/*
 * This function resolves name references and reports errors if the named
 * objects cannot be found.
 */
int
xf86validateConfig (XF86ConfigPtr p)
{
    if (!xf86validateDevice (p))
        return FALSE;
    if (!xf86validateScreen (p))
        return FALSE;
    if (!xf86validateInput (p))
        return FALSE;
    if (!xf86validateLayout (p))
        return FALSE;

    return (TRUE);
}

/*
 * adds an item to the end of the linked list. Any record whose first field
 * is a GenericListRec can be cast to this type and used with this function.
 * A pointer to the head of the list is returned to handle the addition of
 * the first item.
 */
GenericListPtr
xf86addListItem (GenericListPtr head, GenericListPtr new)
{
    GenericListPtr p = head;
    GenericListPtr last = NULL;

    while (p)
    {
        last = p;
        p = p->next;
    }

    if (last)
    {
        last->next = new;
        return (head);
    }
    else
        return (new);
}

/*
 * Test if one chained list contains the other.
 * In this case both list have the same endpoint (provided they don't loop)
 */
int
xf86itemNotSublist(GenericListPtr list_1, GenericListPtr list_2)
{
    GenericListPtr p = list_1;
    GenericListPtr last_1 = NULL, last_2 = NULL;

    while (p) {
        last_1 = p;
        p = p->next;
    }

    p = list_2;
    while (p) {
        last_2 = p;
        p = p->next;
    }

    return (!(last_1 == last_2));
}

void
xf86freeConfig (XF86ConfigPtr p)
{
    if (p == NULL)
        return;

    xf86freeFiles (p->conf_files);
    xf86freeModules (p->conf_modules);
    xf86freeFlags (p->conf_flags);
    xf86freeMonitorList (p->conf_monitor_lst);
    xf86freeModesList (p->conf_modes_lst);
    xf86freeVideoAdaptorList (p->conf_videoadaptor_lst);
    xf86freeDeviceList (p->conf_device_lst);
    xf86freeScreenList (p->conf_screen_lst);
    xf86freeLayoutList (p->conf_layout_lst);
    xf86freeInputList (p->conf_input_lst);
    xf86freeVendorList (p->conf_vendor_lst);
    xf86freeDRI (p->conf_dri);
    xf86freeExtensions (p->conf_extensions);
    TestFree(p->conf_comment);

    xf86conffree (p);
}