gcc/ada/argv.c

   1 /****************************************************************************
   2  *                                                                          *
   3  *                         GNAT COMPILER COMPONENTS                         *
   4  *                                                                          *
   5  *                                A R G V                                   *
   6  *                                                                          *
   7  *                          C Implementation File                           *
   8  *                                                                          *
   9  *         Copyright (C) 1992-2007, Free Software Foundation, Inc.           *
  10  *                                                                          *
  11  * GNAT is free software;  you can  redistribute it  and/or modify it under *
  12  * terms of the  GNU General Public License as published  by the Free Soft- *
  13  * ware  Foundation;  either version 2,  or (at your option) any later ver- *
  14  * sion.  GNAT is distributed in the hope that it will be useful, but WITH- *
  15  * OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY *
  16  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License *
  17  * for  more details.  You should have  received  a copy of the GNU General *
  18  * Public License  distributed with GNAT;  see file COPYING.  If not, write *
  19  * to  the  Free Software Foundation,  51  Franklin  Street,  Fifth  Floor, *
  20  * Boston, MA 02110-1301, USA.                                              *
  21  *                                                                          *
  22  * As a  special  exception,  if you  link  this file  with other  files to *
  23  * produce an executable,  this file does not by itself cause the resulting *
  24  * executable to be covered by the GNU General Public License. This except- *
  25  * ion does not  however invalidate  any other reasons  why the  executable *
  26  * file might be covered by the  GNU Public License.                        *
  27  *                                                                          *
  28  * GNAT was originally developed  by the GNAT team at  New York University. *
  29  * Extensive contributions were provided by Ada Core Technologies Inc.      *
  30  *                                                                          *
  31  ****************************************************************************/
  32
  33 /* Routines for accessing command line arguments from both the runtime
  34    library and from the compiler itself. In the former case, gnat_argc
  35    and gnat_argv are the original argc and argv values as stored by the
  36    binder generated main program, and these routines are accessed from
  37    the Ada.Command_Line package. In the compiler case, gnat_argc and
  38    gnat_argv are the values as modified by toplev, and these routines
  39    are accessed from the Osint package. */
  40
  41 /* Also routines for accessing the environment from the runtime library.
  42    Gnat_envp is the original envp value as stored by the binder generated
  43    main program, and these routines are accessed from the
  44    Ada.Command_Line.Environment package. */
  45
  46 #ifdef IN_RTS
  47 #include "tconfig.h"
  48 #include "tsystem.h"
  49 #include <sys/stat.h>
  50 #else
  51 #include "config.h"
  52 #include "system.h"
  53 #endif
  54
  55 #include "adaint.h"
  56
  57 /* argc and argv of the main program are saved under gnat_argc and gnat_argv,
  58    envp of the main program is saved under gnat_envp.  */
  59
  60 int gnat_argc = 0;
  61 const char **gnat_argv = (const char **) 0;
  62 const char **gnat_envp = (const char **) 0;
  63
  64 #ifdef _WIN32
  65 /* Note that on Windows environment the environ point to a buffer that could
  66    be reallocated if needed. It means that gnat_envp needs to be updated
  67    before using gnat_envp to point to the right environment space */
  68 #include <stdlib.h>
  69 /* for the environ variable definition */
  70 #define gnat_envp (environ)
  71 #endif
  72
  73 int
  74 __gnat_arg_count (void)
  75 {
  76   return gnat_argc;
  77 }
  78
  79 int
  80 __gnat_len_arg (int arg_num)
  81 {
  82   if (gnat_argv != NULL)
  83     return strlen (gnat_argv[arg_num]);
  84   else
  85     return 0;
  86 }
  87
  88 void
  89 __gnat_fill_arg (char *a, int i)
  90 {
  91   if (gnat_argv != NULL)
  92     strncpy (a, gnat_argv[i], strlen(gnat_argv[i]));
  93 }
  94
  95 int
  96 __gnat_env_count (void)
  97 {
  98   int i;
  99
 100   for (i = 0; gnat_envp[i]; i++)
 101     ;
 102   return i;
 103 }
 104
 105 int
 106 __gnat_len_env (int env_num)
 107 {
 108   if (gnat_envp != NULL)
 109     return strlen (gnat_envp[env_num]);
 110   else
 111     return 0;
 112 }
 113
 114 void
 115 __gnat_fill_env (char *a, int i)
 116 {
 117   if (gnat_envp != NULL)
 118     strncpy (a, gnat_envp[i], strlen (gnat_envp[i]));
 119 }