gcc/ada/aux-io.c

   1 /****************************************************************************
   2  *                                                                          *
   3  *                         GNAT RUN-TIME COMPONENTS                         *
   4  *                                                                          *
   5  *                              A - T R A N S                               *
   6  *                                                                          *
   7  *                          C Implementation File                           *
   8  *                                                                          *
   9  *                                                                          *
  10  *           Copyright (C) 1992-2001 Free Software Foundation, Inc.         *
  11  *                                                                          *
  12  * GNAT is free software;  you can  redistribute it  and/or modify it under *
  13  * terms of the  GNU General Public License as published  by the Free Soft- *
  14  * ware  Foundation;  either version 2,  or (at your option) any later ver- *
  15  * sion.  GNAT is distributed in the hope that it will be useful, but WITH- *
  16  * OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY *
  17  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License *
  18  * for  more details.  You should have  received  a copy of the GNU General *
  19  * Public License  distributed with GNAT;  see file COPYING.  If not, write *
  20  * to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, *
  21  * MA 02111-1307, USA.                                                      *
  22  *                                                                          *
  23  * As a  special  exception,  if you  link  this file  with other  files to *
  24  * produce an executable,  this file does not by itself cause the resulting *
  25  * executable to be covered by the GNU General Public License. This except- *
  26  * ion does not  however invalidate  any other reasons  why the  executable *
  27  * file might be covered by the  GNU Public License.                        *
  28  *                                                                          *
  29  * GNAT was originally developed  by the GNAT team at  New York University. *
  30  * Extensive contributions were provided by Ada Core Technologies Inc.      *
  31  *                                                                          *
  32  ****************************************************************************/
  33
  34 #include <stdio.h>
  35
  36 #ifdef IN_RTS
  37 #include "tconfig.h"
  38 #include "tsystem.h"
  39 #else
  40 #include "config.h"
  41 #include "system.h"
  42 #endif
  43
  44 /* Function wrappers are needed to access the values from Ada which are
  45    defined as C macros.  */
  46
  47 FILE *c_stdin         PARAMS ((void));
  48 FILE *c_stdout        PARAMS ((void));
  49 FILE *c_stderr        PARAMS ((void));
  50 int seek_set_function PARAMS ((void));
  51 int seek_end_function PARAMS ((void));
  52 void *null_function   PARAMS ((void));
  53 int c_fileno          PARAMS ((FILE *));
  54
  55 FILE *
  56 c_stdin ()
  57 {
  58   return stdin;
  59 }
  60
  61 FILE *
  62 c_stdout ()
  63 {
  64   return stdout;
  65 }
  66
  67 FILE *
  68 c_stderr ()
  69 {
  70   return stderr;
  71 }
  72
  73 #ifndef SEEK_SET    /* Symbolic constants for the "fseek" function: */
  74 #define SEEK_SET 0  /* Set file pointer to offset */
  75 #define SEEK_CUR 1  /* Set file pointer to its current value plus offset */
  76 #define SEEK_END 2  /* Set file pointer to the size of the file plus offset */
  77 #endif
  78
  79 int
  80 seek_set_function ()
  81 {
  82   return SEEK_SET;
  83 }
  84
  85 int
  86 seek_end_function ()
  87 {
  88   return SEEK_END;
  89 }
  90
  91 void *null_function ()
  92 {
  93   return NULL;
  94 }
  95
  96 int
  97 c_fileno (s)
  98      FILE *s;
  99 {
 100   return fileno (s);
 101 }