libguile/feature.c

   1 /*      Copyright (C) 1995,1996,1998 Free Software Foundation, Inc.
   2  *
   3  * This program is free software; you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License as published by
   5  * the Free Software Foundation; either version 2, or (at your option)
   6  * any later version.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this software; see the file COPYING.  If not, write to
  15  * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
  16  * Boston, MA 02111-1307 USA
  17  *
  18  * As a special exception, the Free Software Foundation gives permission
  19  * for additional uses of the text contained in its release of GUILE.
  20  *
  21  * The exception is that, if you link the GUILE library with other files
  22  * to produce an executable, this does not by itself cause the
  23  * resulting executable to be covered by the GNU General Public License.
  24  * Your use of that executable is in no way restricted on account of
  25  * linking the GUILE library code into it.
  26  *
  27  * This exception does not however invalidate any other reasons why
  28  * the executable file might be covered by the GNU General Public License.
  29  *
  30  * This exception applies only to the code released by the
  31  * Free Software Foundation under the name GUILE.  If you copy
  32  * code from other Free Software Foundation releases into a copy of
  33  * GUILE, as the General Public License permits, the exception does
  34  * not apply to the code that you add in this way.  To avoid misleading
  35  * anyone as to the status of such modified files, you must delete
  36  * this exception notice from them.
  37  *
  38  * If you write modifications of your own for GUILE, it is your choice
  39  * whether to permit this exception to apply to your modifications.
  40  * If you do not wish that, delete this exception notice.  */
  41 \f
  42
  43 #include <stdio.h>
  44 #include "_scm.h"
  45
  46 #include "feature.h"
  47
  48 #ifdef HAVE_STRING_H
  49 #include <string.h>
  50 #endif
  51 \f
  52
  53 static SCM *scm_loc_features;
  54
  55 void
  56 scm_add_feature(str)
  57      char* str;
  58 {
  59   *scm_loc_features = scm_cons(SCM_CAR(scm_intern(str, strlen(str))),
  60                                *scm_loc_features);
  61 }
  62
  63
  64 \f
  65 SCM_PROC(s_program_arguments, "program-arguments", 0, 0, 0, scm_program_arguments);
  66
  67 SCM
  68 scm_program_arguments ()
  69 {
  70   return scm_progargs;
  71 }
  72
  73 /* Set the value returned by program-arguments, given ARGC and ARGV.
  74
  75    If FIRST is non-zero, make it the first element; we do this in
  76    situations where other code (like getopt) has parsed out a few
  77    arguments, but we still want the script name to be the first
  78    element.  */
  79 void
  80 scm_set_program_arguments (argc, argv, first)
  81      int argc;
  82      char **argv;
  83      char *first;
  84 {
  85   scm_progargs = scm_makfromstrs (argc, argv);
  86   if (first)
  87     scm_progargs = scm_cons (scm_makfrom0str (first), scm_progargs);
  88 }
  89
  90
  91 \f
  92
  93 void
  94 scm_init_feature()
  95 {
  96   scm_loc_features = SCM_CDRLOC (scm_sysintern ("*features*", SCM_EOL));
  97 #ifdef SCM_RECKLESS
  98   scm_add_feature("reckless");
  99 #endif
 100 #ifndef _Windows
 101   scm_add_feature("system");
 102 #endif
 103 #ifdef vms
 104   scm_add_feature(s_ed);
 105 #endif
 106 #ifdef SICP
 107   scm_add_feature("sicp");
 108 #endif
 109 #ifndef GO32
 110   scm_add_feature("char-ready?");
 111 #endif
 112 #ifndef CHEAP_CONTINUATIONS
 113   scm_add_feature ("full-continuation");
 114 #endif
 115 #ifdef USE_THREADS
 116   scm_add_feature ("threads");
 117 #endif
 118
 119   scm_sysintern ("char-code-limit", SCM_MAKINUM (SCM_CHAR_CODE_LIMIT));
 120 #include "feature.x"
 121 }