uniconf/uniautogen.cc

   1 /*
   2  * Worldvisions Weaver Software:
   3  *   Copyright (C) 1997-2002 Net Integration Technologies, Inc.
   4  *
   5  * A UniConf moniker that uses an .ini file to look up which moniker it
   6  * should use to find the config file/subtree for a particular application.
   7  */
   8 #include "uniconfroot.h"
   9 #include "unisubtreegen.h"
  10 #include "wvlinkerhack.h"
  11
  12 WV_LINK(UniAutoGen);
  13
  14
  15 /**
  16  * The moniker from which the auto: moniker retrieves its own settings.
  17  * It's a bit silly to override this (since the point is to autoconfigure,
  18  * and manually configuring the autoconfiguration thing is silly) but it's
  19  * useful for writing unit tests.
  20  */
  21 WvString uniautogen_moniker("default:ini:/etc/uniconf.conf");
  22
  23 /*
  24  * A moniker for finding the "right" config generator for a particular
  25  * application, given the application name.
  26  *
  27  * For example, for moniker "auto:org/gnome/Nautilus", we would:
  28  *
  29  *  - open /etc/uniconf.conf.
  30  *  - look for org/gnome/Nautilus in there.
  31  *    - if it exists, use that value as the config moniker, and return.
  32  *  - else, look for org/gnome
  33  *    - if it exists, go get that config moniker,  take the subtree
  34  *       "Nautilus" from there, and return.
  35  *  - else, look for org
  36  *    - if it exists, go get that config moniker,  take the subtree
  37  *       "gnome/Nautilus" from there, and return.
  38  *  - else, look for /
  39  *    - if it exists, go get that config moniker,  take the subtree
  40  *       "org/gnome/Nautilus" from there, and return.
  41  *  - else, return a null: generator.
  42  */
  43 static IUniConfGen *creator(WvStringParm s, IObject *_obj)
  44 {
  45     UniConfRoot cfg((UniConfGen *)
  46                     wvcreate<IUniConfGen>(uniautogen_moniker, _obj), true);
  47     const UniConfKey appname(s);
  48
  49     for (int i = appname.numsegments(); i >= 0; i--)
  50     {
  51         UniConfKey prefix(appname.first(i)), suffix(appname.removefirst(i));
  52
  53         if (!!cfg.xget(prefix))
  54         {
  55             return new UniSubtreeGen(wvcreate<IUniConfGen>(cfg.xget(prefix)),
  56                                      suffix);
  57         }
  58     }
  59
  60     return wvcreate<IUniConfGen>("null:");
  61 }
  62
  63
  64 static WvMoniker<IUniConfGen> autoreg("auto", creator);