mdw@git.distorted.org.uk Git - ssr/blob - StraySrc/Libraries/Steel/c/choices

   1 /*
   2  * choices.c
   3  *
   4  * Handling the global choices repository
   5  *
   6  * © 1994-1998 Straylight
   7  */
   8
   9 /*----- Licensing note ----------------------------------------------------*
  10  *
  11  * This file is part of Straylight's Steel library.
  12  *
  13  * Steel is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License as published by
  15  * the Free Software Foundation; either version 2, or (at your option)
  16  * any later version.
  17  *
  18  * Steel is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU General Public License
  24  * along with Steel.  If not, write to the Free Software Foundation,
  25  * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  26  */
  27
  28 #include <stdlib.h>
  29 #include <string.h>
  30
  31 #include "res.h"
  32 #include "wimpt.h"
  33 #include "buffer.h"
  34
  35 #include "choices.h"
  36
  37 static char choices__root[15];
  38
  39 /*
  40  * void choices_setName(char *progname)
  41  *
  42  * Use
  43  *  Sets the name of the application as used by choices.  The name is
  44  *  truncated to 10 characters if necessary.  If no name is specified (i.e.
  45  *  you don't call this routine) then the name of the application (as passed
  46  *  to wimpt_init) is assumed.
  47  */
  48
  49 void choices_setName(char *progname)
  50 {
  51   memcpy(choices__root,progname,10);
  52   choices__root[10]=0;
  53 }
  54
  55 /*
  56  * char *choices_name(char *leaf,BOOL writable)
  57  *
  58  * Use
  59  *  Locates the name of the specified resource.  If you want to open a file
  60  *  for writing, you should set the writable flag.  Otherwise, this routine
  61  *  will try to find the name of a file which already exists.
  62  *
  63  *  If you only want to read a file, this routine will first look at
  64  *  <Choices$Dir>.leaf, and then at <resPrefix>.leaf, and return whichever
  65  *  is found first.  If neither exists, a name is returned as for the
  66  *  writable case.
  67  *
  68  *  If you want to write a file, then <Choices$Dir>.leaf is returned, unless
  69  *  Choices$Dir is unset, in which case <resPrefix>.leaf is returned.
  70  *
  71  *  resPrefix is the prefix passed to res through res_init or res_setPrefix.
  72  */
  73
  74 char *choices_name(char *leaf,BOOL writable)
  75 {
  76   char *name=buffer_find();
  77   char *choices=getenv("Choices$Write");
  78
  79   /* --- Ensure choices__root is set up properly --- */
  80
  81   if (!choices__root[0])
  82     choices_setName(wimpt_programname());
  83
  84   /* --- Just find one of the cases -- we're only reading --- */
  85
  86   if (!writable)
  87   {
  88     if (choices)
  89     {
  90       sprintf(name,"Choices:%s.%s",choices__root,leaf);
  91       if (res_fileExists(name))
  92         return (name);
  93     }
  94     strcpy(name,res_name(leaf));
  95     if (res_fileExists(name))
  96       return (name);
  97   }
  98
  99   /* --- Find whichever is more appropriate --- */
 100
 101   if (choices)
 102   {
 103     if (writable)
 104     {
 105       /* --- To avoid hassle, create the directory here --- */
 106
 107       sprintf(name,"CDir %s.%s",choices,choices__root);
 108       os_cli(name);
 109     }
 110     sprintf(name,"%s.%s.%s",choices,choices__root,leaf);
 111   }
 112   else
 113     strcpy(name,res_name(leaf));
 114
 115   return (name);
 116 }