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  *           Copyright (C) 1992-2018, 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 #include <stdio.h>
  33
  34 #ifdef IN_RTS
  35 #include "tconfig.h"
  36 #include "tsystem.h"
  37 #else
  38 #include "config.h"
  39 #include "system.h"
  40 #endif
  41
  42 /* Don't use macros versions of this functions on VxWorks since they cause
  43    imcompatible changes in some VxWorks versions */
  44 #ifdef __vxworks
  45 #undef getchar
  46 #undef putchar
  47 #undef feof
  48 #undef ferror
  49 #undef fileno
  50 #endif
  51
  52 /* Function wrappers are needed to access the values from Ada which are
  53    defined as C macros.  */
  54
  55 FILE *c_stdin (void);
  56 FILE *c_stdout (void);
  57 FILE *c_stderr (void);
  58 int seek_set_function (void);
  59 int seek_end_function (void);
  60 void *null_function (void);
  61 int c_fileno (FILE *);
  62
  63 FILE *
  64 c_stdin (void)
  65 {
  66   return stdin;
  67 }
  68
  69 FILE *
  70 c_stdout (void)
  71 {
  72   return stdout;
  73 }
  74
  75 FILE *
  76 c_stderr (void)
  77 {
  78   return stderr;
  79 }
  80
  81 #ifndef SEEK_SET    /* Symbolic constants for the "fseek" function: */
  82 #define SEEK_SET 0  /* Set file pointer to offset */
  83 #define SEEK_CUR 1  /* Set file pointer to its current value plus offset */
  84 #define SEEK_END 2  /* Set file pointer to the size of the file plus offset */
  85 #endif
  86
  87 int
  88 seek_set_function (void)
  89 {
  90   return SEEK_SET;
  91 }
  92
  93 int
  94 seek_end_function (void)
  95 {
  96   return SEEK_END;
  97 }
  98
  99 void *null_function (void)
 100 {
 101   return NULL;
 102 }
 103
 104 int
 105 c_fileno (FILE *s)
 106 {
 107   return fileno (s);
 108 }