1 /* Copyright (C) 2009-2023 Free Software Foundation, Inc.
2 Contributed by Janne Blomqvist
3
4 This file is part of the GNU Fortran runtime library (libgfortran).
5
6 Libgfortran is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3, or (at your option)
9 any later version.
10
11 Libgfortran is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 Under Section 7 of GPL version 3, you are granted additional
17 permissions described in the GCC Runtime Library Exception, version
18 3.1, as published by the Free Software Foundation.
19
20 You should have received a copy of the GNU General Public License and
21 a copy of the GCC Runtime Library Exception along with this program;
22 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
23 <http://www.gnu.org/licenses/>. */
24
25 #ifndef GFOR_UNIX_H
26 #define GFOR_UNIX_H
27
28 #include "io.h"
29
30 struct stream_vtable
31 {
32 ssize_t (* const read) (struct stream *, void *, ssize_t);
33 ssize_t (* const write) (struct stream *, const void *, ssize_t);
34 gfc_offset (* const seek) (struct stream *, gfc_offset, int);
35 gfc_offset (* const tell) (struct stream *);
36 gfc_offset (* const size) (struct stream *);
37 /* Avoid keyword truncate due to AIX namespace collision. */
38 int (* const trunc) (struct stream *, gfc_offset);
39 int (* const flush) (struct stream *);
40 int (* const close) (struct stream *);
41 int (* const markeor) (struct stream *);
42 };
43
44 struct stream
45 {
46 const struct stream_vtable *vptr;
47 };
48
49 /* Inline functions for doing file I/O given a stream. */
50 static inline ssize_t
51 sread (stream *s, void *buf, ssize_t nbyte)
52 {
53 return s->vptr->read (s, buf, nbyte);
54 }
55
56 static inline ssize_t
57 swrite (stream *s, const void *buf, ssize_t nbyte)
58 {
59 return s->vptr->write (s, buf, nbyte);
60 }
61
62 static inline gfc_offset
63 sseek (stream *s, gfc_offset offset, int whence)
64 {
65 return s->vptr->seek (s, offset, whence);
66 }
67
68 static inline gfc_offset
69 stell (stream *s)
70 {
71 return s->vptr->tell (s);
72 }
73
74 static inline gfc_offset
75 ssize (stream *s)
76 {
77 return s->vptr->size (s);
78 }
79
80 static inline int
81 struncate (stream *s, gfc_offset length)
82 {
83 return s->vptr->trunc (s, length);
84 }
85
86 static inline int
87 sflush (stream *s)
88 {
89 return s->vptr->flush (s);
90 }
91
92 static inline int
93 sclose (stream *s)
94 {
95 return s->vptr->close (s);
96 }
97
98 static inline int
99 smarkeor (stream *s)
100 {
101 return s->vptr->markeor (s);
102 }
103
104
105 extern int compare_files (stream *, stream *);
106 internal_proto(compare_files);
107
108 extern stream *open_external (st_parameter_open *, unit_flags *);
109 internal_proto(open_external);
110
111 extern stream *open_internal (char *, size_t, gfc_offset);
112 internal_proto(open_internal);
113
114 extern stream *open_internal4 (char *, size_t, gfc_offset);
115 internal_proto(open_internal4);
116
117 extern char *mem_alloc_w (stream *, size_t *);
118 internal_proto(mem_alloc_w);
119
120 extern char *mem_alloc_r (stream *, size_t *);
121 internal_proto(mem_alloc_r);
122
123 extern gfc_char4_t *mem_alloc_w4 (stream *, size_t *);
124 internal_proto(mem_alloc_w4);
125
126 extern char *mem_alloc_r4 (stream *, size_t *);
127 internal_proto(mem_alloc_r4);
128
129 extern stream *input_stream (void);
130 internal_proto(input_stream);
131
132 extern stream *output_stream (void);
133 internal_proto(output_stream);
134
135 extern stream *error_stream (void);
136 internal_proto(error_stream);
137
138 extern int compare_file_filename (gfc_unit *, const char *, gfc_charlen_type);
139 internal_proto(compare_file_filename);
140
141 extern gfc_unit *find_file (const char *file, gfc_charlen_type file_len);
142 internal_proto(find_file);
143
144 extern int close_share (gfc_unit *);
145 internal_proto(close_share);
146
147 extern int file_exists (const char *file, gfc_charlen_type file_len);
148 internal_proto(file_exists);
149
150 extern GFC_IO_INT file_size (const char *file, gfc_charlen_type file_len);
151 internal_proto(file_size);
152
153 extern const char *inquire_sequential (const char *, gfc_charlen_type);
154 internal_proto(inquire_sequential);
155
156 extern const char *inquire_direct (const char *, gfc_charlen_type);
157 internal_proto(inquire_direct);
158
159 extern const char *inquire_formatted (const char *, gfc_charlen_type);
160 internal_proto(inquire_formatted);
161
162 extern const char *inquire_unformatted (const char *, gfc_charlen_type);
163 internal_proto(inquire_unformatted);
164
165 extern const char *inquire_read (const char *, gfc_charlen_type);
166 internal_proto(inquire_read);
167
168 extern const char *inquire_write (const char *, gfc_charlen_type);
169 internal_proto(inquire_write);
170
171 extern const char *inquire_readwrite (const char *, gfc_charlen_type);
172 internal_proto(inquire_readwrite);
173
174 extern void flush_if_preconnected (stream *);
175 internal_proto(flush_if_preconnected);
176
177 extern int stream_isatty (stream *);
178 internal_proto(stream_isatty);
179
180 #ifndef TTY_NAME_MAX
181 #ifdef _POSIX_TTY_NAME_MAX
182 #define TTY_NAME_MAX _POSIX_TTY_NAME_MAX
183 #else
184 /* sysconf(_SC_TTY_NAME_MAX) = 32 which should be enough. */
185 #define TTY_NAME_MAX 32
186 #endif
187 #endif
188
189 extern int stream_ttyname (stream *, char *, size_t);
190 internal_proto(stream_ttyname);
191
192 #endif