1 /****************************************************************************
2  *                                                                          *
3  *                         GNAT RUN-TIME COMPONENTS                         *
4  *                                                                          *
5  *                              A - T R A N S                               *
6  *                                                                          *
7  *                          C Implementation File                           *
8  *                                                                          *
9  *           Copyright (C) 1992-2020, 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 *
c_stdin(void)61 c_stdin (void)
62 {
63   return stdin;
64 }
65 
66 FILE *
c_stdout(void)67 c_stdout (void)
68 {
69   return stdout;
70 }
71 
72 FILE *
c_stderr(void)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
seek_set_function(void)85 seek_set_function (void)
86 {
87   return SEEK_SET;
88 }
89 
90 int
seek_end_function(void)91 seek_end_function (void)
92 {
93   return SEEK_END;
94 }
95 
null_function(void)96 void *null_function (void)
97 {
98   return NULL;
99 }
100 
101 int
c_fileno(FILE * s)102 c_fileno (FILE *s)
103 {
104   return fileno (s);
105 }
106