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1 | /*- |
2 | * Copyright (c) 1990 The Regents of the University of California. | |
3 | * All rights reserved. | |
4 | * | |
5 | * This code is derived from software contributed to Berkeley by | |
6 | * Chris Torek. | |
7 | * | |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
11 | * 1. Redistributions of source code must retain the above copyright | |
12 | * notice, this list of conditions and the following disclaimer. | |
13 | * 2. Redistributions in binary form must reproduce the above copyright | |
14 | * notice, this list of conditions and the following disclaimer in the | |
15 | * documentation and/or other materials provided with the distribution. | |
16 | * 3. All advertising materials mentioning features or use of this software | |
17 | * must display the following acknowledgement: | |
18 | * This product includes software developed by the University of | |
19 | * California, Berkeley and its contributors. | |
20 | * 4. Neither the name of the University nor the names of its contributors | |
21 | * may be used to endorse or promote products derived from this software | |
22 | * without specific prior written permission. | |
23 | * | |
24 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
25 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
28 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
29 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
30 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
31 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
32 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
33 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
34 | * SUCH DAMAGE. | |
35 | * | |
36 | * @(#)stdio.h 5.17 (Berkeley) 6/3/91 | |
37 | */ | |
38 | ||
39 | #ifndef _STDIO_H_ | |
40 | #define _STDIO_H_ | |
41 | ||
42 | #include <sys/cdefs.h> | |
43 | ||
44 | #include <machine/ansi.h> | |
45 | #ifdef _SIZE_T_ | |
46 | typedef _SIZE_T_ size_t; | |
47 | #undef _SIZE_T_ | |
48 | #endif | |
49 | ||
50 | #ifndef NULL | |
51 | #define NULL 0 | |
52 | #endif | |
53 | ||
54 | typedef long fpos_t; /* Must match off_t <sys/types.h> */ | |
55 | ||
56 | #define _FSTDIO /* Define for new stdio with functions. */ | |
57 | ||
58 | /* | |
59 | * NB: to fit things in six character monocase externals, the stdio | |
60 | * code uses the prefix `__s' for stdio objects, typically followed | |
61 | * by a three-character attempt at a mnemonic. | |
62 | */ | |
63 | ||
64 | /* stdio buffers */ | |
65 | struct __sbuf { | |
66 | unsigned char *_base; | |
67 | int _size; | |
68 | }; | |
69 | ||
70 | /* | |
71 | * stdio state variables. | |
72 | * | |
73 | * The following always hold: | |
74 | * | |
75 | * if (_flags&(__SLBF|__SWR)) == (__SLBF|__SWR), | |
76 | * _lbfsize is -_bf._size, else _lbfsize is 0 | |
77 | * if _flags&__SRD, _w is 0 | |
78 | * if _flags&__SWR, _r is 0 | |
79 | * | |
80 | * This ensures that the getc and putc macros (or inline functions) never | |
81 | * try to write or read from a file that is in `read' or `write' mode. | |
82 | * (Moreover, they can, and do, automatically switch from read mode to | |
83 | * write mode, and back, on "r+" and "w+" files.) | |
84 | * | |
85 | * _lbfsize is used only to make the inline line-buffered output stream | |
86 | * code as compact as possible. | |
87 | * | |
88 | * _ub, _up, and _ur are used when ungetc() pushes back more characters | |
89 | * than fit in the current _bf, or when ungetc() pushes back a character | |
90 | * that does not match the previous one in _bf. When this happens, | |
91 | * _ub._base becomes non-nil (i.e., a stream has ungetc() data iff | |
92 | * _ub._base!=NULL) and _up and _ur save the current values of _p and _r. | |
93 | */ | |
94 | typedef struct __sFILE { | |
95 | unsigned char *_p; /* current position in (some) buffer */ | |
96 | int _r; /* read space left for getc() */ | |
97 | int _w; /* write space left for putc() */ | |
98 | short _flags; /* flags, below; this FILE is free if 0 */ | |
99 | short _file; /* fileno, if Unix descriptor, else -1 */ | |
100 | struct __sbuf _bf; /* the buffer (at least 1 byte, if !NULL) */ | |
101 | int _lbfsize; /* 0 or -_bf._size, for inline putc */ | |
102 | ||
103 | /* operations */ | |
104 | void *_cookie; /* cookie passed to io functions */ | |
105 | int (*_close) __P((void *)); | |
106 | int (*_read) __P((void *, char *, int)); | |
107 | fpos_t (*_seek) __P((void *, fpos_t, int)); | |
108 | int (*_write) __P((void *, const char *, int)); | |
109 | ||
110 | /* separate buffer for long sequences of ungetc() */ | |
111 | struct __sbuf _ub; /* ungetc buffer */ | |
112 | unsigned char *_up; /* saved _p when _p is doing ungetc data */ | |
113 | int _ur; /* saved _r when _r is counting ungetc data */ | |
114 | ||
115 | /* tricks to meet minimum requirements even when malloc() fails */ | |
116 | unsigned char _ubuf[3]; /* guarantee an ungetc() buffer */ | |
117 | unsigned char _nbuf[1]; /* guarantee a getc() buffer */ | |
118 | ||
119 | /* separate buffer for fgetline() when line crosses buffer boundary */ | |
120 | struct __sbuf _lb; /* buffer for fgetline() */ | |
121 | ||
122 | /* Unix stdio files get aligned to block boundaries on fseek() */ | |
123 | int _blksize; /* stat.st_blksize (may be != _bf._size) */ | |
124 | int _offset; /* current lseek offset */ | |
125 | } FILE; | |
126 | ||
127 | __BEGIN_DECLS | |
128 | extern FILE __sF[]; | |
129 | __END_DECLS | |
130 | ||
131 | #define __SLBF 0x0001 /* line buffered */ | |
132 | #define __SNBF 0x0002 /* unbuffered */ | |
133 | #define __SRD 0x0004 /* OK to read */ | |
134 | #define __SWR 0x0008 /* OK to write */ | |
135 | /* RD and WR are never simultaneously asserted */ | |
136 | #define __SRW 0x0010 /* open for reading & writing */ | |
137 | #define __SEOF 0x0020 /* found EOF */ | |
138 | #define __SERR 0x0040 /* found error */ | |
139 | #define __SMBF 0x0080 /* _buf is from malloc */ | |
140 | #define __SAPP 0x0100 /* fdopen()ed in append mode */ | |
141 | #define __SSTR 0x0200 /* this is an sprintf/snprintf string */ | |
142 | #define __SOPT 0x0400 /* do fseek() optimisation */ | |
143 | #define __SNPT 0x0800 /* do not do fseek() optimisation */ | |
144 | #define __SOFF 0x1000 /* set iff _offset is in fact correct */ | |
145 | #define __SMOD 0x2000 /* true => fgetline modified _p text */ | |
146 | ||
147 | /* | |
148 | * The following three definitions are for ANSI C, which took them | |
149 | * from System V, which brilliantly took internal interface macros and | |
150 | * made them official arguments to setvbuf(), without renaming them. | |
151 | * Hence, these ugly _IOxxx names are *supposed* to appear in user code. | |
152 | * | |
153 | * Although numbered as their counterparts above, the implementation | |
154 | * does not rely on this. | |
155 | */ | |
156 | #define _IOFBF 0 /* setvbuf should set fully buffered */ | |
157 | #define _IOLBF 1 /* setvbuf should set line buffered */ | |
158 | #define _IONBF 2 /* setvbuf should set unbuffered */ | |
159 | ||
160 | #define BUFSIZ 1024 /* size of buffer used by setbuf */ | |
161 | #define EOF (-1) | |
162 | ||
163 | /* | |
164 | * FOPEN_MAX is a minimum maximum, and should be the number of descriptors | |
165 | * that the kernel can provide without allocation of a resource that can | |
166 | * fail without the process sleeping. Do not use this for anything. | |
167 | */ | |
168 | #define FOPEN_MAX 20 /* must be <= OPEN_MAX <sys/syslimits.h> */ | |
169 | #define FILENAME_MAX 1024 /* must be <= PATH_MAX <sys/syslimits.h> */ | |
170 | ||
171 | /* System V/ANSI C; this is the wrong way to do this, do *not* use these. */ | |
172 | #ifndef _ANSI_SOURCE | |
173 | #define P_tmpdir "/var/tmp/" | |
174 | #endif | |
175 | #define L_tmpnam 1024 /* XXX must be == PATH_MAX */ | |
176 | #define TMP_MAX 308915776 | |
177 | ||
178 | #ifndef SEEK_SET | |
179 | #define SEEK_SET 0 /* set file offset to offset */ | |
180 | #endif | |
181 | #ifndef SEEK_CUR | |
182 | #define SEEK_CUR 1 /* set file offset to current plus offset */ | |
183 | #endif | |
184 | #ifndef SEEK_END | |
185 | #define SEEK_END 2 /* set file offset to EOF plus offset */ | |
186 | #endif | |
187 | ||
188 | #define stdin (&__sF[0]) | |
189 | #define stdout (&__sF[1]) | |
190 | #define stderr (&__sF[2]) | |
191 | ||
192 | /* | |
193 | * Functions defined in ANSI C standard. | |
194 | */ | |
195 | __BEGIN_DECLS | |
196 | void clearerr __P((FILE *)); | |
197 | int fclose __P((FILE *)); | |
198 | int feof __P((FILE *)); | |
199 | int ferror __P((FILE *)); | |
200 | int fflush __P((FILE *)); | |
201 | int fgetc __P((FILE *)); | |
202 | int fgetpos __P((FILE *, fpos_t *)); | |
203 | char *fgets __P((char *, size_t, FILE *)); | |
204 | FILE *fopen __P((const char *, const char *)); | |
205 | int fprintf __P((FILE *, const char *, ...)); | |
206 | int fputc __P((int, FILE *)); | |
207 | int fputs __P((const char *, FILE *)); | |
208 | int fread __P((void *, size_t, size_t, FILE *)); | |
209 | FILE *freopen __P((const char *, const char *, FILE *)); | |
210 | int fscanf __P((FILE *, const char *, ...)); | |
211 | int fseek __P((FILE *, long, int)); | |
212 | int fsetpos __P((FILE *, const fpos_t *)); | |
213 | long ftell __P((const FILE *)); | |
214 | int fwrite __P((const void *, size_t, size_t, FILE *)); | |
215 | int getc __P((FILE *)); | |
216 | int getchar __P((void)); | |
217 | char *gets __P((char *)); | |
218 | #if !defined(_ANSI_SOURCE) && !defined(_POSIX_SOURCE) | |
219 | extern int sys_nerr; /* perror(3) external variables */ | |
220 | extern char *sys_errlist[]; | |
221 | #endif | |
222 | void perror __P((const char *)); | |
223 | int printf __P((const char *, ...)); | |
224 | int putc __P((int, FILE *)); | |
225 | int putchar __P((int)); | |
226 | int puts __P((const char *)); | |
227 | int remove __P((const char *)); | |
228 | int rename __P((const char *, const char *)); | |
229 | void rewind __P((FILE *)); | |
230 | int scanf __P((const char *, ...)); | |
231 | void setbuf __P((FILE *, char *)); | |
232 | int setvbuf __P((FILE *, char *, int, size_t)); | |
233 | int sprintf __P((char *, const char *, ...)); | |
234 | int sscanf __P((char *, const char *, ...)); | |
235 | FILE *tmpfile __P((void)); | |
236 | char *tmpnam __P((char *)); | |
237 | int ungetc __P((int, FILE *)); | |
238 | int vfprintf __P((FILE *, const char *, _VA_LIST_)); | |
239 | int vprintf __P((const char *, _VA_LIST_)); | |
240 | int vsprintf __P((char *, const char *, _VA_LIST_)); | |
241 | __END_DECLS | |
242 | ||
243 | /* | |
244 | * Functions defined in POSIX 1003.1. | |
245 | */ | |
246 | #ifndef _ANSI_SOURCE | |
247 | #define L_cuserid 9 /* size for cuserid(); UT_NAMESIZE + 1 */ | |
248 | #define L_ctermid 1024 /* size for ctermid(); PATH_MAX */ | |
249 | ||
250 | __BEGIN_DECLS | |
251 | char *ctermid __P((char *)); | |
252 | FILE *fdopen __P((int, const char *)); | |
253 | int fileno __P((FILE *)); | |
254 | __END_DECLS | |
255 | #endif /* not ANSI */ | |
256 | ||
257 | /* | |
258 | * Routines that are purely local. | |
259 | */ | |
260 | #if !defined (_ANSI_SOURCE) && !defined(_POSIX_SOURCE) | |
261 | __BEGIN_DECLS | |
262 | char *fgetline __P((FILE *, size_t *)); | |
263 | int fpurge __P((FILE *)); | |
264 | int getw __P((FILE *)); | |
265 | int pclose __P((FILE *)); | |
266 | FILE *popen __P((const char *, const char *)); | |
267 | int putw __P((int, FILE *)); | |
268 | void setbuffer __P((FILE *, char *, int)); | |
269 | int setlinebuf __P((FILE *)); | |
270 | char *tempnam __P((const char *, const char *)); | |
271 | int snprintf __P((char *, size_t, const char *, ...)); | |
272 | int vsnprintf __P((char *, size_t, const char *, _VA_LIST_)); | |
273 | int vscanf __P((const char *, _VA_LIST_)); | |
274 | int vsscanf __P((const char *, const char *, _VA_LIST_)); | |
275 | __END_DECLS | |
276 | ||
277 | /* | |
278 | * This is a #define because the function is used internally and | |
279 | * (unlike vfscanf) the name __svfscanf is guaranteed not to collide | |
280 | * with a user function when _ANSI_SOURCE or _POSIX_SOURCE is defined. | |
281 | */ | |
282 | #define vfscanf __svfscanf | |
283 | ||
284 | /* | |
285 | * Stdio function-access interface. | |
286 | */ | |
287 | __BEGIN_DECLS | |
288 | FILE *funopen __P((const void *, | |
289 | int (*)(void *, char *, int), | |
290 | int (*)(void *, const char *, int), | |
291 | fpos_t (*)(void *, fpos_t, int), | |
292 | int (*)(void *))); | |
293 | __END_DECLS | |
294 | #define fropen(cookie, fn) funopen(cookie, fn, 0, 0, 0) | |
295 | #define fwopen(cookie, fn) funopen(cookie, 0, fn, 0, 0) | |
296 | #endif /* !_ANSI_SOURCE && !_POSIX_SOURCE */ | |
297 | ||
298 | /* | |
299 | * Functions internal to the implementation. | |
300 | */ | |
301 | __BEGIN_DECLS | |
302 | int __srget __P((FILE *)); | |
303 | int __svfscanf __P((FILE *, const char *, _VA_LIST_)); | |
304 | int __swbuf __P((int, FILE *)); | |
305 | __END_DECLS | |
306 | ||
307 | /* | |
308 | * The __sfoo macros are here so that we can | |
309 | * define function versions in the C library. | |
310 | */ | |
311 | #define __sgetc(p) (--(p)->_r < 0 ? __srget(p) : (int)(*(p)->_p++)) | |
312 | #if defined(__GNUC__) && defined(__STDC__) | |
313 | static inline int __sputc(int _c, FILE *_p) { | |
314 | if (--_p->_w >= 0 || (_p->_w >= _p->_lbfsize && (char)_c != '\n')) | |
315 | return (*_p->_p++ = _c); | |
316 | else | |
317 | return (__swbuf(_c, _p)); | |
318 | } | |
319 | #else | |
320 | /* | |
321 | * This has been tuned to generate reasonable code on the vax using pcc. | |
322 | */ | |
323 | #define __sputc(c, p) \ | |
324 | (--(p)->_w < 0 ? \ | |
325 | (p)->_w >= (p)->_lbfsize ? \ | |
326 | (*(p)->_p = (c)), *(p)->_p != '\n' ? \ | |
327 | (int)*(p)->_p++ : \ | |
328 | __swbuf('\n', p) : \ | |
329 | __swbuf((int)(c), p) : \ | |
330 | (*(p)->_p = (c), (int)*(p)->_p++)) | |
331 | #endif | |
332 | ||
333 | #define __sfeof(p) (((p)->_flags & __SEOF) != 0) | |
334 | #define __sferror(p) (((p)->_flags & __SERR) != 0) | |
335 | #define __sclearerr(p) ((void)((p)->_flags &= ~(__SERR|__SEOF))) | |
336 | #define __sfileno(p) ((p)->_file) | |
337 | ||
338 | #define feof(p) __sfeof(p) | |
339 | #define ferror(p) __sferror(p) | |
340 | #define clearerr(p) __sclearerr(p) | |
341 | ||
342 | #ifndef _ANSI_SOURCE | |
343 | #define fileno(p) __sfileno(p) | |
344 | #endif | |
345 | ||
346 | #ifndef lint | |
347 | #define getc(fp) __sgetc(fp) | |
348 | #define putc(x, fp) __sputc(x, fp) | |
349 | #endif /* lint */ | |
350 | ||
351 | #define getchar() getc(stdin) | |
352 | #define putchar(x) putc(x, stdout) | |
353 | #endif /* _STDIO_H_ */ |