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read.c

/* $XFree86: xc/programs/Xserver/hw/xfree86/parser/read.c,v 1.24 2003/08/24 17:37:08 dawes Exp $ */
/* 
 * 
 * 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, ""},
};

#define CLEANUP xf86freeConfig

XF86ConfigPtr
xf86readConfigFile (void)
{
      int token;
      XF86ConfigPtr ptr = NULL;

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

      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;
            }
      }

      if (xf86validateConfig (ptr))
            return (ptr);
      else
      {
            CLEANUP (ptr);
            return (NULL);
      }
}

#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);
}

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