1/*
2 * Copyright (c) 2000-2002, 2004 Sendmail, Inc. and its suppliers.
3 * All rights reserved.
4 * Copyright (c) 1990
5 * The Regents of the University of California. All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * Chris Torek.
9 *
10 * By using this file, you agree to the terms and conditions set
11 * forth in the LICENSE file which can be found at the top level of
12 * the sendmail distribution.
13 *
14 * $Id: io.h,v 1.24 2004/03/03 19:14:49 ca Exp $
15 */
16
17/*-
18 * @(#)stdio.h 5.17 (Berkeley) 6/3/91
19 */
20
21#ifndef SM_IO_H
22#define SM_IO_H
23
24#include <stdio.h>
25#include <sm/gen.h>
26#include <sm/varargs.h>
27
28/* mode for sm io (exposed) */
29#define SM_IO_RDWR 1 /* read-write */
30#define SM_IO_RDONLY 2 /* read-only */
31#define SM_IO_WRONLY 3 /* write-only */
32#define SM_IO_APPEND 4 /* write-only from eof */
33#define SM_IO_APPENDRW 5 /* read-write from eof */
34#define SM_IO_RDWRTR 6 /* read-write with truncation indicated */
35
36# define SM_IO_BINARY 0x0 /* binary mode: not used in Unix */
37#define SM_IS_BINARY(mode) (((mode) & SM_IO_BINARY) != 0)
38#define SM_IO_MODE(mode) ((mode) & 0x0f)
39
40#define SM_IO_RDWR_B (SM_IO_RDWR|SM_IO_BINARY)
41#define SM_IO_RDONLY_B (SM_IO_RDONLY|SM_IO_BINARY)
42#define SM_IO_WRONLY_B (SM_IO_WRONLY|SM_IO_BINARY)
43#define SM_IO_APPEND_B (SM_IO_APPEND|SM_IO_BINARY)
44#define SM_IO_APPENDRW_B (SM_IO_APPENDRW|SM_IO_BINARY)
45#define SM_IO_RDWRTR_B (SM_IO_RDWRTR|SM_IO_BINARY)
46
47/* for sm_io_fseek, et al api's (exposed) */
48#define SM_IO_SEEK_SET 0
49#define SM_IO_SEEK_CUR 1
50#define SM_IO_SEEK_END 2
51
52/* flags for info what's with different types (exposed) */
53#define SM_IO_WHAT_MODE 1
54#define SM_IO_WHAT_VECTORS 2
55#define SM_IO_WHAT_FD 3
56#define SM_IO_WHAT_TYPE 4
57#define SM_IO_WHAT_ISTYPE 5
58#define SM_IO_IS_READABLE 6
59#define SM_IO_WHAT_TIMEOUT 7
60#define SM_IO_WHAT_SIZE 8
61
62/* info flags (exposed) */
63#define SM_IO_FTYPE_CREATE 1
64#define SM_IO_FTYPE_MODIFY 2
65#define SM_IO_FTYPE_DELETE 3
66
67#define SM_IO_SL_PRIO 1
68
69#define SM_IO_OPEN_MAX 20
70
71/* for internal buffers */
72struct smbuf
73{
74 unsigned char *smb_base;
75 int smb_size;
76};
77
78/*
79** sm I/O state variables (internal only).
80**
81** The following always hold:
82**
83** if (flags&(SMLBF|SMWR)) == (SMLBF|SMWR),
84** lbfsize is -bf.size, else lbfsize is 0
85** if flags&SMRD, w is 0
86** if flags&SMWR, r is 0
87**
88** This ensures that the getc and putc macros (or inline functions) never
89** try to write or read from a file that is in `read' or `write' mode.
90** (Moreover, they can, and do, automatically switch from read mode to
91** write mode, and back, on "r+" and "w+" files.)
92**
93** lbfsize is used only to make the inline line-buffered output stream
94** code as compact as possible.
95**
96** ub, up, and ur are used when ungetc() pushes back more characters
97** than fit in the current bf, or when ungetc() pushes back a character
98** that does not match the previous one in bf. When this happens,
99** ub.base becomes non-nil (i.e., a stream has ungetc() data iff
100** ub.base!=NULL) and up and ur save the current values of p and r.
101*/
102
103typedef struct sm_file SM_FILE_T;
104
105struct sm_file
106{
107 const char *sm_magic; /* This SM_FILE_T is free when NULL */
108 unsigned char *f_p; /* current position in (some) buffer */
109 int f_r; /* read space left for getc() */
110 int f_w; /* write space left for putc() */
111 long f_flags; /* flags, below */
112 short f_file; /* fileno, if Unix fd, else -1 */
113 struct smbuf f_bf; /* the buffer (>= 1 byte, if !NULL) */
114 int f_lbfsize; /* 0 or -bf.size, for inline putc */
115
116 /* These can be used for any purpose by a file type implementation: */
117 void *f_cookie;
118 int f_ival;
119
120 /* operations */
121 int (*f_close) __P((SM_FILE_T *));
122 ssize_t (*f_read) __P((SM_FILE_T *, char *, size_t));
123 off_t (*f_seek) __P((SM_FILE_T *, off_t, int));
124 ssize_t (*f_write) __P((SM_FILE_T *, const char *, size_t));
125 int (*f_open) __P((SM_FILE_T *, const void *, int,
126 const void *));
127 int (*f_setinfo) __P((SM_FILE_T *, int , void *));
128 int (*f_getinfo) __P((SM_FILE_T *, int , void *));
129 int f_timeout;
130 int f_timeoutstate; /* either blocking or non-blocking */
131 char *f_type; /* for by-type lookups */
132 struct sm_file *f_flushfp; /* flush this before reading parent */
133 struct sm_file *f_modefp; /* sync mode with this fp */
134
135 /* separate buffer for long sequences of ungetc() */
136 struct smbuf f_ub; /* ungetc buffer */
137 unsigned char *f_up; /* saved f_p when f_p is doing ungetc */
138 int f_ur; /* saved f_r when f_r is counting ungetc */
139
140 /* tricks to meet minimum requirements even when malloc() fails */
141 unsigned char f_ubuf[3]; /* guarantee an ungetc() buffer */
142 unsigned char f_nbuf[1]; /* guarantee a getc() buffer */
143
144 /* Unix stdio files get aligned to block boundaries on fseek() */
145 int f_blksize; /* stat.st_blksize (may be != bf.size) */
146 off_t f_lseekoff; /* current lseek offset */
147 int f_dup_cnt; /* count file dup'd */
148};
149
150__BEGIN_DECLS
151extern SM_FILE_T SmIoF[];
152extern const char SmFileMagic[];
153extern SM_FILE_T SmFtStdio_def;
154extern SM_FILE_T SmFtStdiofd_def;
155extern SM_FILE_T SmFtString_def;
156extern SM_FILE_T SmFtSyslog_def;
157extern SM_FILE_T SmFtRealStdio_def;
158
159#define SMIOIN_FILENO 0
160#define SMIOOUT_FILENO 1
161#define SMIOERR_FILENO 2
162#define SMIOSTDIN_FILENO 3
163#define SMIOSTDOUT_FILENO 4
164#define SMIOSTDERR_FILENO 5
165
166/* Common predefined and already (usually) open files (exposed) */
167#define smioin (&SmIoF[SMIOIN_FILENO])
168#define smioout (&SmIoF[SMIOOUT_FILENO])
169#define smioerr (&SmIoF[SMIOERR_FILENO])
170#define smiostdin (&SmIoF[SMIOSTDIN_FILENO])
171#define smiostdout (&SmIoF[SMIOSTDOUT_FILENO])
172#define smiostderr (&SmIoF[SMIOSTDERR_FILENO])
173
174#define SmFtStdio (&SmFtStdio_def)
175#define SmFtStdiofd (&SmFtStdiofd_def)
176#define SmFtString (&SmFtString_def)
177#define SmFtSyslog (&SmFtSyslog_def)
178#define SmFtRealStdio (&SmFtRealStdio_def)
179
180#ifdef __STDC__
181# define SM_IO_SET_TYPE(f, name, open, close, read, write, seek, get, set, timeout) \
182 (f) = {SmFileMagic, (unsigned char *) 0, 0, 0, 0L, -1, {0}, 0, (void *) 0,\
183 0, (close), (read), (seek), (write), (open), (set), (get), (timeout),\
184 0, (name)}
185# define SM_IO_INIT_TYPE(f, name, open, close, read, write, seek, get, set, timeout)
186
187#else /* __STDC__ */
188# define SM_IO_SET_TYPE(f, name, open, close, read, write, seek, get, set, timeout) (f)
189# define SM_IO_INIT_TYPE(f, name, open, close, read, write, seek, get, set, timeout) \
190 (f).sm_magic = SmFileMagic; \
191 (f).f_p = (unsigned char *) 0; \
192 (f).f_r = 0; \
193 (f).f_w = 0; \
194 (f).f_flags = 0L; \
195 (f).f_file = 0; \
196 (f).f_bf.smb_base = (unsigned char *) 0; \
197 (f).f_bf.smb_size = 0; \
198 (f).f_lbfsize = 0; \
199 (f).f_cookie = (void *) 0; \
200 (f).f_ival = 0; \
201 (f).f_close = (close); \
202 (f).f_read = (read); \
203 (f).f_seek = (seek); \
204 (f).f_write = (write); \
205 (f).f_open = (open); \
206 (f).f_setinfo = (set); \
207 (f).f_getinfo = (get); \
208 (f).f_timeout = (timeout); \
209 (f).f_timeoutstate = 0; \
210 (f).f_type = (name);
211
212#endif /* __STDC__ */
213
214__END_DECLS
215
216/* Internal flags */
217#define SMFBF 0x000001 /* XXXX fully buffered */
218#define SMLBF 0x000002 /* line buffered */
219#define SMNBF 0x000004 /* unbuffered */
220#define SMNOW 0x000008 /* Flush each write; take read now */
221#define SMRD 0x000010 /* OK to read */
222#define SMWR 0x000020 /* OK to write */
223 /* RD and WR are never simultaneously asserted */
224#define SMRW 0x000040 /* open for reading & writing */
225#define SMFEOF 0x000080 /* found EOF */
226#define SMERR 0x000100 /* found error */
227#define SMMBF 0x000200 /* buf is from malloc */
228#define SMAPP 0x000400 /* fdopen()ed in append mode */
229#define SMSTR 0x000800 /* this is an snprintf string */
230#define SMOPT 0x001000 /* do fseek() optimisation */
231#define SMNPT 0x002000 /* do not do fseek() optimisation */
232#define SMOFF 0x004000 /* set iff offset is in fact correct */
233#define SMALC 0x010000 /* allocate string space dynamically */
234
235#define SMMODEMASK 0x0070 /* read/write mode */
236
237/* defines for timeout constants */
238#define SM_TIME_IMMEDIATE (0)
239#define SM_TIME_FOREVER (-1)
240#define SM_TIME_DEFAULT (-2)
241
242/* timeout state for blocking */
243#define SM_TIME_BLOCK (0) /* XXX just bool? */
244#define SM_TIME_NONBLOCK (1)
245
246/* Exposed buffering type flags */
247#define SM_IO_FBF 0 /* setvbuf should set fully buffered */
248#define SM_IO_LBF 1 /* setvbuf should set line buffered */
249#define SM_IO_NBF 2 /* setvbuf should set unbuffered */
250
251/* setvbuf buffered, but through at lower file type layers */
252#define SM_IO_NOW 3
253
254/*
255** size of buffer used by setbuf.
256** If underlying filesystem blocksize is discoverable that is used instead
257*/
258
259#define SM_IO_BUFSIZ 4096
260
261#define SM_IO_EOF (-1)
262
263/* Functions defined in ANSI C standard. */
264__BEGIN_DECLS
265SM_FILE_T *sm_io_autoflush __P((SM_FILE_T *, SM_FILE_T *));
266void sm_io_automode __P((SM_FILE_T *, SM_FILE_T *));
267void sm_io_clearerr __P((SM_FILE_T *));
268int sm_io_close __P((SM_FILE_T *, int SM_NONVOLATILE));
269SM_FILE_T *sm_io_dup __P((SM_FILE_T *));
270int sm_io_eof __P((SM_FILE_T *));
271int sm_io_error __P((SM_FILE_T *));
272char *sm_io_fgets __P((SM_FILE_T *, int, char *, int));
273int sm_io_flush __P((SM_FILE_T *, int SM_NONVOLATILE));
274
275int PRINTFLIKE(3, 4)
276sm_io_fprintf __P((SM_FILE_T *, int, const char *, ...));
277
278int sm_io_fputs __P((SM_FILE_T *, int, const char *));
279
280int SCANFLIKE(3, 4)
281sm_io_fscanf __P((SM_FILE_T *, int, const char *, ...));
282
283int sm_io_getc __P((SM_FILE_T *, int));
284int sm_io_getinfo __P((SM_FILE_T *, int, void *));
285SM_FILE_T *sm_io_open __P((const SM_FILE_T *, int SM_NONVOLATILE, const void *,
286 int, const void *));
287int sm_io_purge __P((SM_FILE_T *));
288int sm_io_putc __P((SM_FILE_T *, int, int));
289size_t sm_io_read __P((SM_FILE_T *, int, void *, size_t));
290SM_FILE_T *sm_io_reopen __P((const SM_FILE_T *, int SM_NONVOLATILE,
291 const void *, int, const void *, SM_FILE_T *));
292void sm_io_rewind __P((SM_FILE_T *, int));
293int sm_io_seek __P((SM_FILE_T *, int SM_NONVOLATILE, long SM_NONVOLATILE,
294 int SM_NONVOLATILE));
295int sm_io_setinfo __P((SM_FILE_T *, int, void *));
296int sm_io_setvbuf __P((SM_FILE_T *, int, char *, int, size_t));
297
298int SCANFLIKE(2, 3)
299sm_io_sscanf __P((const char *, char const *, ...));
300
301long sm_io_tell __P((SM_FILE_T *, int SM_NONVOLATILE));
302int sm_io_ungetc __P((SM_FILE_T *, int, int));
303int sm_io_vfprintf __P((SM_FILE_T *, int, const char *, va_list));
304size_t sm_io_write __P((SM_FILE_T *, int, const void *, size_t));
305
306void sm_strio_init __P((SM_FILE_T *, char *, size_t));
307
308extern SM_FILE_T *
309sm_io_fopen __P((
310 char *_pathname,
311 int _flags,
312 ...));
313
314extern SM_FILE_T *
315sm_io_stdioopen __P((
316 FILE *_stream,
317 char *_mode));
318
319extern int
320sm_vasprintf __P((
321 char **_str,
322 const char *_fmt,
323 va_list _ap));
324
325extern int
326sm_vsnprintf __P((
327 char *,
328 size_t,
329 const char *,
330 va_list));
331
332extern void
333sm_perror __P((
334 const char *));
335
336__END_DECLS
337
338/*
339** Functions internal to the implementation.
340*/
341
342__BEGIN_DECLS
343int sm_rget __P((SM_FILE_T *, int));
344int sm_vfscanf __P((SM_FILE_T *, int SM_NONVOLATILE, const char *,
345 va_list SM_NONVOLATILE));
346int sm_wbuf __P((SM_FILE_T *, int, int));
347__END_DECLS
348
349/*
350** The macros are here so that we can
351** define function versions in the library.
352*/
353
354#define sm_getc(f, t) \
355 (--(f)->f_r < 0 ? \
356 sm_rget(f, t) : \
357 (int)(*(f)->f_p++))
358
359/*
360** This has been tuned to generate reasonable code on the vax using pcc.
361** (It also generates reasonable x86 code using gcc.)
362*/
363
364#define sm_putc(f, t, c) \
365 (--(f)->f_w < 0 ? \
366 (f)->f_w >= (f)->f_lbfsize ? \
367 (*(f)->f_p = (c)), *(f)->f_p != '\n' ? \
368 (int)*(f)->f_p++ : \
369 sm_wbuf(f, t, '\n') : \
370 sm_wbuf(f, t, (int)(c)) : \
371 (*(f)->f_p = (c), (int)*(f)->f_p++))
372
373#define sm_eof(p) (((p)->f_flags & SMFEOF) != 0)
374#define sm_error(p) (((p)->f_flags & SMERR) != 0)
375#define sm_clearerr(p) ((void)((p)->f_flags &= ~(SMERR|SMFEOF)))
376
377#define sm_io_eof(p) sm_eof(p)
378#define sm_io_error(p) sm_error(p)
379
380#define sm_io_clearerr(p) sm_clearerr(p)
381
382#ifndef lint
383# ifndef _POSIX_SOURCE
384# define sm_io_getc(fp, t) sm_getc(fp, t)
385# define sm_io_putc(fp, t, x) sm_putc(fp, t, x)
386# endif /* _POSIX_SOURCE */
387#endif /* lint */
388
389#endif /* SM_IO_H */
2 * Copyright (c) 2000-2002, 2004 Sendmail, Inc. and its suppliers.
3 * All rights reserved.
4 * Copyright (c) 1990
5 * The Regents of the University of California. All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * Chris Torek.
9 *
10 * By using this file, you agree to the terms and conditions set
11 * forth in the LICENSE file which can be found at the top level of
12 * the sendmail distribution.
13 *
14 * $Id: io.h,v 1.24 2004/03/03 19:14:49 ca Exp $
15 */
16
17/*-
18 * @(#)stdio.h 5.17 (Berkeley) 6/3/91
19 */
20
21#ifndef SM_IO_H
22#define SM_IO_H
23
24#include <stdio.h>
25#include <sm/gen.h>
26#include <sm/varargs.h>
27
28/* mode for sm io (exposed) */
29#define SM_IO_RDWR 1 /* read-write */
30#define SM_IO_RDONLY 2 /* read-only */
31#define SM_IO_WRONLY 3 /* write-only */
32#define SM_IO_APPEND 4 /* write-only from eof */
33#define SM_IO_APPENDRW 5 /* read-write from eof */
34#define SM_IO_RDWRTR 6 /* read-write with truncation indicated */
35
36# define SM_IO_BINARY 0x0 /* binary mode: not used in Unix */
37#define SM_IS_BINARY(mode) (((mode) & SM_IO_BINARY) != 0)
38#define SM_IO_MODE(mode) ((mode) & 0x0f)
39
40#define SM_IO_RDWR_B (SM_IO_RDWR|SM_IO_BINARY)
41#define SM_IO_RDONLY_B (SM_IO_RDONLY|SM_IO_BINARY)
42#define SM_IO_WRONLY_B (SM_IO_WRONLY|SM_IO_BINARY)
43#define SM_IO_APPEND_B (SM_IO_APPEND|SM_IO_BINARY)
44#define SM_IO_APPENDRW_B (SM_IO_APPENDRW|SM_IO_BINARY)
45#define SM_IO_RDWRTR_B (SM_IO_RDWRTR|SM_IO_BINARY)
46
47/* for sm_io_fseek, et al api's (exposed) */
48#define SM_IO_SEEK_SET 0
49#define SM_IO_SEEK_CUR 1
50#define SM_IO_SEEK_END 2
51
52/* flags for info what's with different types (exposed) */
53#define SM_IO_WHAT_MODE 1
54#define SM_IO_WHAT_VECTORS 2
55#define SM_IO_WHAT_FD 3
56#define SM_IO_WHAT_TYPE 4
57#define SM_IO_WHAT_ISTYPE 5
58#define SM_IO_IS_READABLE 6
59#define SM_IO_WHAT_TIMEOUT 7
60#define SM_IO_WHAT_SIZE 8
61
62/* info flags (exposed) */
63#define SM_IO_FTYPE_CREATE 1
64#define SM_IO_FTYPE_MODIFY 2
65#define SM_IO_FTYPE_DELETE 3
66
67#define SM_IO_SL_PRIO 1
68
69#define SM_IO_OPEN_MAX 20
70
71/* for internal buffers */
72struct smbuf
73{
74 unsigned char *smb_base;
75 int smb_size;
76};
77
78/*
79** sm I/O state variables (internal only).
80**
81** The following always hold:
82**
83** if (flags&(SMLBF|SMWR)) == (SMLBF|SMWR),
84** lbfsize is -bf.size, else lbfsize is 0
85** if flags&SMRD, w is 0
86** if flags&SMWR, r is 0
87**
88** This ensures that the getc and putc macros (or inline functions) never
89** try to write or read from a file that is in `read' or `write' mode.
90** (Moreover, they can, and do, automatically switch from read mode to
91** write mode, and back, on "r+" and "w+" files.)
92**
93** lbfsize is used only to make the inline line-buffered output stream
94** code as compact as possible.
95**
96** ub, up, and ur are used when ungetc() pushes back more characters
97** than fit in the current bf, or when ungetc() pushes back a character
98** that does not match the previous one in bf. When this happens,
99** ub.base becomes non-nil (i.e., a stream has ungetc() data iff
100** ub.base!=NULL) and up and ur save the current values of p and r.
101*/
102
103typedef struct sm_file SM_FILE_T;
104
105struct sm_file
106{
107 const char *sm_magic; /* This SM_FILE_T is free when NULL */
108 unsigned char *f_p; /* current position in (some) buffer */
109 int f_r; /* read space left for getc() */
110 int f_w; /* write space left for putc() */
111 long f_flags; /* flags, below */
112 short f_file; /* fileno, if Unix fd, else -1 */
113 struct smbuf f_bf; /* the buffer (>= 1 byte, if !NULL) */
114 int f_lbfsize; /* 0 or -bf.size, for inline putc */
115
116 /* These can be used for any purpose by a file type implementation: */
117 void *f_cookie;
118 int f_ival;
119
120 /* operations */
121 int (*f_close) __P((SM_FILE_T *));
122 ssize_t (*f_read) __P((SM_FILE_T *, char *, size_t));
123 off_t (*f_seek) __P((SM_FILE_T *, off_t, int));
124 ssize_t (*f_write) __P((SM_FILE_T *, const char *, size_t));
125 int (*f_open) __P((SM_FILE_T *, const void *, int,
126 const void *));
127 int (*f_setinfo) __P((SM_FILE_T *, int , void *));
128 int (*f_getinfo) __P((SM_FILE_T *, int , void *));
129 int f_timeout;
130 int f_timeoutstate; /* either blocking or non-blocking */
131 char *f_type; /* for by-type lookups */
132 struct sm_file *f_flushfp; /* flush this before reading parent */
133 struct sm_file *f_modefp; /* sync mode with this fp */
134
135 /* separate buffer for long sequences of ungetc() */
136 struct smbuf f_ub; /* ungetc buffer */
137 unsigned char *f_up; /* saved f_p when f_p is doing ungetc */
138 int f_ur; /* saved f_r when f_r is counting ungetc */
139
140 /* tricks to meet minimum requirements even when malloc() fails */
141 unsigned char f_ubuf[3]; /* guarantee an ungetc() buffer */
142 unsigned char f_nbuf[1]; /* guarantee a getc() buffer */
143
144 /* Unix stdio files get aligned to block boundaries on fseek() */
145 int f_blksize; /* stat.st_blksize (may be != bf.size) */
146 off_t f_lseekoff; /* current lseek offset */
147 int f_dup_cnt; /* count file dup'd */
148};
149
150__BEGIN_DECLS
151extern SM_FILE_T SmIoF[];
152extern const char SmFileMagic[];
153extern SM_FILE_T SmFtStdio_def;
154extern SM_FILE_T SmFtStdiofd_def;
155extern SM_FILE_T SmFtString_def;
156extern SM_FILE_T SmFtSyslog_def;
157extern SM_FILE_T SmFtRealStdio_def;
158
159#define SMIOIN_FILENO 0
160#define SMIOOUT_FILENO 1
161#define SMIOERR_FILENO 2
162#define SMIOSTDIN_FILENO 3
163#define SMIOSTDOUT_FILENO 4
164#define SMIOSTDERR_FILENO 5
165
166/* Common predefined and already (usually) open files (exposed) */
167#define smioin (&SmIoF[SMIOIN_FILENO])
168#define smioout (&SmIoF[SMIOOUT_FILENO])
169#define smioerr (&SmIoF[SMIOERR_FILENO])
170#define smiostdin (&SmIoF[SMIOSTDIN_FILENO])
171#define smiostdout (&SmIoF[SMIOSTDOUT_FILENO])
172#define smiostderr (&SmIoF[SMIOSTDERR_FILENO])
173
174#define SmFtStdio (&SmFtStdio_def)
175#define SmFtStdiofd (&SmFtStdiofd_def)
176#define SmFtString (&SmFtString_def)
177#define SmFtSyslog (&SmFtSyslog_def)
178#define SmFtRealStdio (&SmFtRealStdio_def)
179
180#ifdef __STDC__
181# define SM_IO_SET_TYPE(f, name, open, close, read, write, seek, get, set, timeout) \
182 (f) = {SmFileMagic, (unsigned char *) 0, 0, 0, 0L, -1, {0}, 0, (void *) 0,\
183 0, (close), (read), (seek), (write), (open), (set), (get), (timeout),\
184 0, (name)}
185# define SM_IO_INIT_TYPE(f, name, open, close, read, write, seek, get, set, timeout)
186
187#else /* __STDC__ */
188# define SM_IO_SET_TYPE(f, name, open, close, read, write, seek, get, set, timeout) (f)
189# define SM_IO_INIT_TYPE(f, name, open, close, read, write, seek, get, set, timeout) \
190 (f).sm_magic = SmFileMagic; \
191 (f).f_p = (unsigned char *) 0; \
192 (f).f_r = 0; \
193 (f).f_w = 0; \
194 (f).f_flags = 0L; \
195 (f).f_file = 0; \
196 (f).f_bf.smb_base = (unsigned char *) 0; \
197 (f).f_bf.smb_size = 0; \
198 (f).f_lbfsize = 0; \
199 (f).f_cookie = (void *) 0; \
200 (f).f_ival = 0; \
201 (f).f_close = (close); \
202 (f).f_read = (read); \
203 (f).f_seek = (seek); \
204 (f).f_write = (write); \
205 (f).f_open = (open); \
206 (f).f_setinfo = (set); \
207 (f).f_getinfo = (get); \
208 (f).f_timeout = (timeout); \
209 (f).f_timeoutstate = 0; \
210 (f).f_type = (name);
211
212#endif /* __STDC__ */
213
214__END_DECLS
215
216/* Internal flags */
217#define SMFBF 0x000001 /* XXXX fully buffered */
218#define SMLBF 0x000002 /* line buffered */
219#define SMNBF 0x000004 /* unbuffered */
220#define SMNOW 0x000008 /* Flush each write; take read now */
221#define SMRD 0x000010 /* OK to read */
222#define SMWR 0x000020 /* OK to write */
223 /* RD and WR are never simultaneously asserted */
224#define SMRW 0x000040 /* open for reading & writing */
225#define SMFEOF 0x000080 /* found EOF */
226#define SMERR 0x000100 /* found error */
227#define SMMBF 0x000200 /* buf is from malloc */
228#define SMAPP 0x000400 /* fdopen()ed in append mode */
229#define SMSTR 0x000800 /* this is an snprintf string */
230#define SMOPT 0x001000 /* do fseek() optimisation */
231#define SMNPT 0x002000 /* do not do fseek() optimisation */
232#define SMOFF 0x004000 /* set iff offset is in fact correct */
233#define SMALC 0x010000 /* allocate string space dynamically */
234
235#define SMMODEMASK 0x0070 /* read/write mode */
236
237/* defines for timeout constants */
238#define SM_TIME_IMMEDIATE (0)
239#define SM_TIME_FOREVER (-1)
240#define SM_TIME_DEFAULT (-2)
241
242/* timeout state for blocking */
243#define SM_TIME_BLOCK (0) /* XXX just bool? */
244#define SM_TIME_NONBLOCK (1)
245
246/* Exposed buffering type flags */
247#define SM_IO_FBF 0 /* setvbuf should set fully buffered */
248#define SM_IO_LBF 1 /* setvbuf should set line buffered */
249#define SM_IO_NBF 2 /* setvbuf should set unbuffered */
250
251/* setvbuf buffered, but through at lower file type layers */
252#define SM_IO_NOW 3
253
254/*
255** size of buffer used by setbuf.
256** If underlying filesystem blocksize is discoverable that is used instead
257*/
258
259#define SM_IO_BUFSIZ 4096
260
261#define SM_IO_EOF (-1)
262
263/* Functions defined in ANSI C standard. */
264__BEGIN_DECLS
265SM_FILE_T *sm_io_autoflush __P((SM_FILE_T *, SM_FILE_T *));
266void sm_io_automode __P((SM_FILE_T *, SM_FILE_T *));
267void sm_io_clearerr __P((SM_FILE_T *));
268int sm_io_close __P((SM_FILE_T *, int SM_NONVOLATILE));
269SM_FILE_T *sm_io_dup __P((SM_FILE_T *));
270int sm_io_eof __P((SM_FILE_T *));
271int sm_io_error __P((SM_FILE_T *));
272char *sm_io_fgets __P((SM_FILE_T *, int, char *, int));
273int sm_io_flush __P((SM_FILE_T *, int SM_NONVOLATILE));
274
275int PRINTFLIKE(3, 4)
276sm_io_fprintf __P((SM_FILE_T *, int, const char *, ...));
277
278int sm_io_fputs __P((SM_FILE_T *, int, const char *));
279
280int SCANFLIKE(3, 4)
281sm_io_fscanf __P((SM_FILE_T *, int, const char *, ...));
282
283int sm_io_getc __P((SM_FILE_T *, int));
284int sm_io_getinfo __P((SM_FILE_T *, int, void *));
285SM_FILE_T *sm_io_open __P((const SM_FILE_T *, int SM_NONVOLATILE, const void *,
286 int, const void *));
287int sm_io_purge __P((SM_FILE_T *));
288int sm_io_putc __P((SM_FILE_T *, int, int));
289size_t sm_io_read __P((SM_FILE_T *, int, void *, size_t));
290SM_FILE_T *sm_io_reopen __P((const SM_FILE_T *, int SM_NONVOLATILE,
291 const void *, int, const void *, SM_FILE_T *));
292void sm_io_rewind __P((SM_FILE_T *, int));
293int sm_io_seek __P((SM_FILE_T *, int SM_NONVOLATILE, long SM_NONVOLATILE,
294 int SM_NONVOLATILE));
295int sm_io_setinfo __P((SM_FILE_T *, int, void *));
296int sm_io_setvbuf __P((SM_FILE_T *, int, char *, int, size_t));
297
298int SCANFLIKE(2, 3)
299sm_io_sscanf __P((const char *, char const *, ...));
300
301long sm_io_tell __P((SM_FILE_T *, int SM_NONVOLATILE));
302int sm_io_ungetc __P((SM_FILE_T *, int, int));
303int sm_io_vfprintf __P((SM_FILE_T *, int, const char *, va_list));
304size_t sm_io_write __P((SM_FILE_T *, int, const void *, size_t));
305
306void sm_strio_init __P((SM_FILE_T *, char *, size_t));
307
308extern SM_FILE_T *
309sm_io_fopen __P((
310 char *_pathname,
311 int _flags,
312 ...));
313
314extern SM_FILE_T *
315sm_io_stdioopen __P((
316 FILE *_stream,
317 char *_mode));
318
319extern int
320sm_vasprintf __P((
321 char **_str,
322 const char *_fmt,
323 va_list _ap));
324
325extern int
326sm_vsnprintf __P((
327 char *,
328 size_t,
329 const char *,
330 va_list));
331
332extern void
333sm_perror __P((
334 const char *));
335
336__END_DECLS
337
338/*
339** Functions internal to the implementation.
340*/
341
342__BEGIN_DECLS
343int sm_rget __P((SM_FILE_T *, int));
344int sm_vfscanf __P((SM_FILE_T *, int SM_NONVOLATILE, const char *,
345 va_list SM_NONVOLATILE));
346int sm_wbuf __P((SM_FILE_T *, int, int));
347__END_DECLS
348
349/*
350** The macros are here so that we can
351** define function versions in the library.
352*/
353
354#define sm_getc(f, t) \
355 (--(f)->f_r < 0 ? \
356 sm_rget(f, t) : \
357 (int)(*(f)->f_p++))
358
359/*
360** This has been tuned to generate reasonable code on the vax using pcc.
361** (It also generates reasonable x86 code using gcc.)
362*/
363
364#define sm_putc(f, t, c) \
365 (--(f)->f_w < 0 ? \
366 (f)->f_w >= (f)->f_lbfsize ? \
367 (*(f)->f_p = (c)), *(f)->f_p != '\n' ? \
368 (int)*(f)->f_p++ : \
369 sm_wbuf(f, t, '\n') : \
370 sm_wbuf(f, t, (int)(c)) : \
371 (*(f)->f_p = (c), (int)*(f)->f_p++))
372
373#define sm_eof(p) (((p)->f_flags & SMFEOF) != 0)
374#define sm_error(p) (((p)->f_flags & SMERR) != 0)
375#define sm_clearerr(p) ((void)((p)->f_flags &= ~(SMERR|SMFEOF)))
376
377#define sm_io_eof(p) sm_eof(p)
378#define sm_io_error(p) sm_error(p)
379
380#define sm_io_clearerr(p) sm_clearerr(p)
381
382#ifndef lint
383# ifndef _POSIX_SOURCE
384# define sm_io_getc(fp, t) sm_getc(fp, t)
385# define sm_io_putc(fp, t, x) sm_putc(fp, t, x)
386# endif /* _POSIX_SOURCE */
387#endif /* lint */
388
389#endif /* SM_IO_H */