/*
 * choices.c
 *
 * Handling the global choices repository
 *
 * © 1994-1998 Straylight
 */

/*----- Licensing note ----------------------------------------------------*
 *
 * This file is part of Straylight's Steel library.
 *
 * Steel is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * Steel is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Steel.  If not, write to the Free Software Foundation,
 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

#include <stdlib.h>
#include <string.h>

#include "res.h"
#include "wimpt.h"
#include "buffer.h"

#include "choices.h"

static char choices__root[15];

/*
 * void choices_setName(char *progname)
 *
 * Use
 *  Sets the name of the application as used by choices.  The name is
 *  truncated to 10 characters if necessary.  If no name is specified (i.e.
 *  you don't call this routine) then the name of the application (as passed
 *  to wimpt_init) is assumed.
 */

void choices_setName(char *progname)
{
  memcpy(choices__root,progname,10);
  choices__root[10]=0;
}

/*
 * char *choices_name(char *leaf,BOOL writable)
 *
 * Use
 *  Locates the name of the specified resource.  If you want to open a file
 *  for writing, you should set the writable flag.  Otherwise, this routine
 *  will try to find the name of a file which already exists.
 *
 *  If you only want to read a file, this routine will first look at
 *  <Choices$Dir>.leaf, and then at <resPrefix>.leaf, and return whichever
 *  is found first.  If neither exists, a name is returned as for the
 *  writable case.
 *
 *  If you want to write a file, then <Choices$Dir>.leaf is returned, unless
 *  Choices$Dir is unset, in which case <resPrefix>.leaf is returned.
 *
 *  resPrefix is the prefix passed to res through res_init or res_setPrefix.
 */

char *choices_name(char *leaf,BOOL writable)
{
  char *name=buffer_find();
  char *choices=getenv("Choices$Write");

  /* --- Ensure choices__root is set up properly --- */

  if (!choices__root[0])
    choices_setName(wimpt_programname());

  /* --- Just find one of the cases -- we're only reading --- */

  if (!writable)
  {
    if (choices)
    {
      sprintf(name,"Choices:%s.%s",choices__root,leaf);
      if (res_fileExists(name))
        return (name);
    }
    strcpy(name,res_name(leaf));
    if (res_fileExists(name))
      return (name);
  }

  /* --- Find whichever is more appropriate --- */

  if (choices)
  {
    if (writable)
    {
      /* --- To avoid hassle, create the directory here --- */

      sprintf(name,"CDir %s.%s",choices,choices__root);
      os_cli(name);
    }
    sprintf(name,"%s.%s.%s",choices,choices__root,leaf);
  }
  else
    strcpy(name,res_name(leaf));

  return (name);
}