gcc/ada/argv.c

   1 /****************************************************************************
   2  *                                                                          *
   3  *                         GNAT COMPILER COMPONENTS                         *
   4  *                                                                          *
   5  *                                A R G V                                   *
   6  *                                                                          *
   7  *                          C Implementation File                           *
   8  *                                                                          *
   9  *                            $Revision: 1.1 $
  10  *                                                                          *
  11  *         Copyright (C) 1992-2001 Free Software Foundation, Inc.           *
  12  *                                                                          *
  13  * GNAT is free software;  you can  redistribute it  and/or modify it under *
  14  * terms of the  GNU General Public License as published  by the Free Soft- *
  15  * ware  Foundation;  either version 2,  or (at your option) any later ver- *
  16  * sion.  GNAT is distributed in the hope that it will be useful, but WITH- *
  17  * OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY *
  18  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License *
  19  * for  more details.  You should have  received  a copy of the GNU General *
  20  * Public License  distributed with GNAT;  see file COPYING.  If not, write *
  21  * to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, *
  22  * MA 02111-1307, USA.                                                      *
  23  *                                                                          *
  24  * As a  special  exception,  if you  link  this file  with other  files to *
  25  * produce an executable,  this file does not by itself cause the resulting *
  26  * executable to be covered by the GNU General Public License. This except- *
  27  * ion does not  however invalidate  any other reasons  why the  executable *
  28  * file might be covered by the  GNU Public License.                        *
  29  *                                                                          *
  30  * GNAT was originally developed  by the GNAT team at  New York University. *
  31  * Extensive contributions were provided by Ada Core Technologies Inc.      *
  32  *                                                                          *
  33  ****************************************************************************/
  34
  35 /* Routines for accessing command line arguments from both the runtime
  36    library and from the compiler itself. In the former case, gnat_argc
  37    and gnat_argv are the original argc and argv values as stored by the
  38    binder generated main program, and these routines are accessed from
  39    the Ada.Command_Line package. In the compiler case, gnat_argc and
  40    gnat_argv are the values as modified by toplev, and these routines
  41    are accessed from the Osint package. */
  42
  43 /* Also routines for accessing the environment from the runtime library.
  44    Gnat_envp is the original envp value as stored by the binder generated
  45    main program, and these routines are accessed from the
  46    Ada.Command_Line.Environment package. */
  47
  48 #ifdef IN_RTS
  49 #include "tconfig.h"
  50 #include "tsystem.h"
  51 #include <sys/stat.h>
  52 #else
  53 #include "config.h"
  54 #include "system.h"
  55 #endif
  56
  57 #include "adaint.h"
  58
  59 /* argc and argv of the main program are saved under gnat_argc and gnat_argv,
  60    envp of the main program is saved under gnat_envp.  */
  61
  62 int gnat_argc = 0;
  63 const char **gnat_argv = (const char **) 0;
  64 const char **gnat_envp = (const char **) 0;
  65
  66 int
  67 __gnat_arg_count ()
  68 {
  69   return gnat_argc;
  70 }
  71
  72 int
  73 __gnat_len_arg (arg_num)
  74    int arg_num;
  75 {
  76   return strlen (gnat_argv[arg_num]);
  77 }
  78
  79 void
  80 __gnat_fill_arg (a, i)
  81    char *a;
  82    int i;
  83 {
  84   strncpy (a, gnat_argv[i], strlen(gnat_argv[i]));
  85 }
  86
  87 int
  88 __gnat_env_count ()
  89 {
  90   int i;
  91
  92   for (i = 0; gnat_envp[i]; i++)
  93     ;
  94   return i;
  95 }
  96
  97 int
  98 __gnat_len_env (env_num)
  99    int env_num;
 100 {
 101   return strlen (gnat_envp[env_num]);
 102 }
 103
 104 void
 105 __gnat_fill_env (a, i)
 106    char *a;
 107    int i;
 108 {
 109   strncpy (a, gnat_envp[i], strlen (gnat_envp[i]));
 110 }