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) 1992-2012, 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 #ifdef __cplusplus
  57 extern "C" {
  58 #endif
  59
  60 /* argc and argv of the main program are saved under gnat_argc and gnat_argv,
  61    envp of the main program is saved under gnat_envp.  */
  62
  63 int gnat_argc = 0;
  64 const char **gnat_argv = (const char **) 0;
  65 const char **gnat_envp = (const char **) 0;
  66
  67 #if defined (_WIN32) && !defined (RTX)
  68 /* Note that on Windows environment the environ point to a buffer that could
  69    be reallocated if needed. It means that gnat_envp needs to be updated
  70    before using gnat_envp to point to the right environment space */
  71 #include <stdlib.h>
  72 /* for the environ variable definition */
  73 #define gnat_envp (environ)
  74 #endif
  75
  76 int
  77 __gnat_arg_count (void)
  78 {
  79   return gnat_argc;
  80 }
  81
  82 int
  83 __gnat_len_arg (int arg_num)
  84 {
  85   if (gnat_argv != NULL)
  86     return strlen (gnat_argv[arg_num]);
  87   else
  88     return 0;
  89 }
  90
  91 void
  92 __gnat_fill_arg (char *a, int i)
  93 {
  94   if (gnat_argv != NULL)
  95     strncpy (a, gnat_argv[i], strlen(gnat_argv[i]));
  96 }
  97
  98 int
  99 __gnat_env_count (void)
 100 {
 101   int i;
 102
 103   for (i = 0; gnat_envp[i]; i++)
 104     ;
 105   return i;
 106 }
 107
 108 int
 109 __gnat_len_env (int env_num)
 110 {
 111   if (gnat_envp != NULL)
 112     return strlen (gnat_envp[env_num]);
 113   else
 114     return 0;
 115 }
 116
 117 void
 118 __gnat_fill_env (char *a, int i)
 119 {
 120   if (gnat_envp != NULL)
 121     strncpy (a, gnat_envp[i], strlen (gnat_envp[i]));
 122 }
 123
 124 #ifdef __cplusplus
 125 }
 126 #endif