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) 1992-2023, 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 #ifndef IN_RTS
  35 #include "config.h"
  36 #include "system.h"
  37 #endif
  38
  39 /* Don't use macros versions of this functions on VxWorks since they cause
  40    imcompatible changes in some VxWorks versions */
  41 #ifdef __vxworks
  42 #undef getchar
  43 #undef putchar
  44 #undef feof
  45 #undef ferror
  46 #undef fileno
  47 #endif
  48
  49 /* Function wrappers are needed to access the values from Ada which are
  50    defined as C macros.  */
  51
  52 FILE *c_stdin (void);
  53 FILE *c_stdout (void);
  54 FILE *c_stderr (void);
  55 int seek_set_function (void);
  56 int seek_end_function (void);
  57 void *null_function (void);
  58 int c_fileno (FILE *);
  59
  60 FILE *
  61 c_stdin (void)
  62 {
  63   return stdin;
  64 }
  65
  66 FILE *
  67 c_stdout (void)
  68 {
  69   return stdout;
  70 }
  71
  72 FILE *
  73 c_stderr (void)
  74 {
  75   return stderr;
  76 }
  77
  78 #ifndef SEEK_SET    /* Symbolic constants for the "fseek" function: */
  79 #define SEEK_SET 0  /* Set file pointer to offset */
  80 #define SEEK_CUR 1  /* Set file pointer to its current value plus offset */
  81 #define SEEK_END 2  /* Set file pointer to the size of the file plus offset */
  82 #endif
  83
  84 int
  85 seek_set_function (void)
  86 {
  87   return SEEK_SET;
  88 }
  89
  90 int
  91 seek_end_function (void)
  92 {
  93   return SEEK_END;
  94 }
  95
  96 void *null_function (void)
  97 {
  98   return NULL;
  99 }
 100
 101 int
 102 c_fileno (FILE *s)
 103 {
 104   return fileno (s);
 105 }