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) 1992-2009, 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 3,  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.                                     *
  17  *                                                                          *
  18  * As a special exception under Section 7 of GPL version 3, you are granted *
  19  * additional permissions described in the GCC Runtime Library Exception,   *
  20  * version 3.1, as published by the Free Software Foundation.               *
  21  *                                                                          *
  22  * You should have received a copy of the GNU General Public License and    *
  23  * a copy of the GCC Runtime Library Exception along with this program;     *
  24  * see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    *
  25  * <http://www.gnu.org/licenses/>.                                          *
  26  *                                                                          *
  27  * GNAT was originally developed  by the GNAT team at  New York University. *
  28  * Extensive contributions were provided by Ada Core Technologies Inc.      *
  29  *                                                                          *
  30  ****************************************************************************/
  31
  32 /* Routines for accessing command line arguments from both the runtime
  33    library and from the compiler itself. In the former case, gnat_argc
  34    and gnat_argv are the original argc and argv values as stored by the
  35    binder generated main program, and these routines are accessed from
  36    the Ada.Command_Line package. In the compiler case, gnat_argc and
  37    gnat_argv are the values as modified by toplev, and these routines
  38    are accessed from the Osint package. */
  39
  40 /* Also routines for accessing the environment from the runtime library.
  41    Gnat_envp is the original envp value as stored by the binder generated
  42    main program, and these routines are accessed from the
  43    Ada.Command_Line.Environment package. */
  44
  45 #ifdef IN_RTS
  46 #include "tconfig.h"
  47 #include "tsystem.h"
  48 #include <sys/stat.h>
  49 #else
  50 #include "config.h"
  51 #include "system.h"
  52 #endif
  53
  54 #include "adaint.h"
  55
  56 /* argc and argv of the main program are saved under gnat_argc and gnat_argv,
  57    envp of the main program is saved under gnat_envp.  */
  58
  59 int gnat_argc = 0;
  60 const char **gnat_argv = (const char **) 0;
  61 const char **gnat_envp = (const char **) 0;
  62
  63 #if defined (_WIN32) && !defined (RTX)
  64 /* Note that on Windows environment the environ point to a buffer that could
  65    be reallocated if needed. It means that gnat_envp needs to be updated
  66    before using gnat_envp to point to the right environment space */
  67 #include <stdlib.h>
  68 /* for the environ variable definition */
  69 #define gnat_envp (environ)
  70 #endif
  71
  72 int
  73 __gnat_arg_count (void)
  74 {
  75   return gnat_argc;
  76 }
  77
  78 int
  79 __gnat_len_arg (int arg_num)
  80 {
  81   if (gnat_argv != NULL)
  82     return strlen (gnat_argv[arg_num]);
  83   else
  84     return 0;
  85 }
  86
  87 void
  88 __gnat_fill_arg (char *a, int i)
  89 {
  90   if (gnat_argv != NULL)
  91     strncpy (a, gnat_argv[i], strlen(gnat_argv[i]));
  92 }
  93
  94 int
  95 __gnat_env_count (void)
  96 {
  97   int i;
  98
  99   for (i = 0; gnat_envp[i]; i++)
 100     ;
 101   return i;
 102 }
 103
 104 int
 105 __gnat_len_env (int env_num)
 106 {
 107   if (gnat_envp != NULL)
 108     return strlen (gnat_envp[env_num]);
 109   else
 110     return 0;
 111 }
 112
 113 void
 114 __gnat_fill_env (char *a, int i)
 115 {
 116   if (gnat_envp != NULL)
 117     strncpy (a, gnat_envp[i], strlen (gnat_envp[i]));
 118 }