Annotation of prex-old/usr/include/stdio.h, Revision 1.1.1.1
1.1 nbrk 1: /*-
2: * Copyright (c) 1990, 1993
3: * The Regents of the University of California. 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. Neither the name of the University nor the names of its contributors
17: * may be used to endorse or promote products derived from this software
18: * without specific prior written permission.
19: *
20: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30: * SUCH DAMAGE.
31: *
32: * @(#)stdio.h 8.5 (Berkeley) 4/29/95
33: */
34:
35: #ifndef _STDIO_H_
36: #define _STDIO_H_
37:
38: #include <sys/types.h>
39: #include <sys/cdefs.h>
40:
41: #include <machine/ansi.h>
42: #ifdef _BSD_SIZE_T_
43: typedef _BSD_SIZE_T_ size_t;
44: #undef _BSD_SIZE_T_
45: #endif
46:
47: #include <sys/null.h>
48:
49: typedef off_t fpos_t;
50:
51: #define _FSTDIO /* Define for new stdio with functions. */
52:
53: /*
54: * NB: to fit things in six character monocase externals, the stdio
55: * code uses the prefix `__s' for stdio objects, typically followed
56: * by a three-character attempt at a mnemonic.
57: */
58:
59: /* stdio buffers */
60: struct __sbuf {
61: unsigned char *_base;
62: int _size;
63: };
64:
65: /*
66: * stdio state variables.
67: *
68: * The following always hold:
69: *
70: * if (_flags&(__SLBF|__SWR)) == (__SLBF|__SWR),
71: * _lbfsize is -_bf._size, else _lbfsize is 0
72: * if _flags&__SRD, _w is 0
73: * if _flags&__SWR, _r is 0
74: *
75: * This ensures that the getc and putc macros (or inline functions) never
76: * try to write or read from a file that is in `read' or `write' mode.
77: * (Moreover, they can, and do, automatically switch from read mode to
78: * write mode, and back, on "r+" and "w+" files.)
79: *
80: * _lbfsize is used only to make the inline line-buffered output stream
81: * code as compact as possible.
82: *
83: * _ub, _up, and _ur are used when ungetc() pushes back more characters
84: * than fit in the current _bf, or when ungetc() pushes back a character
85: * that does not match the previous one in _bf. When this happens,
86: * _ub._base becomes non-nil (i.e., a stream has ungetc() data iff
87: * _ub._base!=NULL) and _up and _ur save the current values of _p and _r.
88: *
89: * NB: see WARNING above before changing the layout of this structure!
90: */
91: typedef struct __sFILE {
92: struct __sFILE *next; /* file chain */
93: unsigned char *_p; /* current position in (some) buffer */
94: int _r; /* read space left for getc() */
95: int _w; /* write space left for putc() */
96: short _flags; /* flags, below; this FILE is free if 0 */
97: short _file; /* fileno, if Unix descriptor, else -1 */
98: struct __sbuf _bf; /* the buffer (at least 1 byte, if !NULL) */
99:
100: /* separate buffer for long sequences of ungetc() */
101: struct __sbuf _ub; /* ungetc buffer */
102: unsigned char *_up; /* saved _p when _p is doing ungetc data */
103: int _ur; /* saved _r when _r is counting ungetc data */
104:
105: /* tricks to meet minimum requirements even when malloc() fails */
106: unsigned char _ubuf[3]; /* guarantee an ungetc() buffer */
107: unsigned char _nbuf[1]; /* guarantee a getc() buffer */
108: } FILE;
109:
110: __BEGIN_DECLS
111: extern FILE __sF[];
112: __END_DECLS
113:
114: #define __SLBF 0x0001 /* line buffered */
115: #define __SNBF 0x0002 /* unbuffered */
116: #define __SRD 0x0004 /* OK to read */
117: #define __SWR 0x0008 /* OK to write */
118: /* RD and WR are never simultaneously asserted */
119: #define __SRW 0x0010 /* open for reading & writing */
120: #define __SEOF 0x0020 /* found EOF */
121: #define __SERR 0x0040 /* found error */
122: #define __SMBF 0x0080 /* _buf is from malloc */
123: #define __SAPP 0x0100 /* fdopen()ed in append mode */
124: #define __SSTR 0x0200 /* this is an sprintf/snprintf string */
125:
126: /*
127: * The following three definitions are for ANSI C, which took them
128: * from System V, which brilliantly took internal interface macros and
129: * made them official arguments to setvbuf(), without renaming them.
130: * Hence, these ugly _IOxxx names are *supposed* to appear in user code.
131: *
132: * Although numbered as their counterparts above, the implementation
133: * does not rely on this.
134: */
135: #define _IOFBF 0 /* setvbuf should set fully buffered */
136: #define _IOLBF 1 /* setvbuf should set line buffered */
137: #define _IONBF 2 /* setvbuf should set unbuffered */
138:
139: #define BUFSIZ 512 /* size of buffer used by setbuf */
140: #define EOF (-1)
141:
142: /*
143: * FOPEN_MAX is a minimum maximum, and is the number of streams that
144: * stdio can provide without attempting to allocate further resources
145: * (which could fail). Do not use this for anything.
146: */
147: /* must be == _POSIX_STREAM_MAX <limits.h> */
148: #define FOPEN_MAX 16 /* must be <= OPEN_MAX <sys/syslimits.h> */
149: #define FILENAME_MAX 256 /* must be <= PATH_MAX <sys/syslimits.h> */
150:
151: /* System V/ANSI C; this is the wrong way to do this, do *not* use these. */
152: #ifndef _ANSI_SOURCE
153: #define P_tmpdir "/var/tmp/"
154: #endif
155: #define L_tmpnam 255 /* XXX must be == PATH_MAX */
156: #define TMP_MAX 308915776
157:
158: /* access function */
159: #define F_OK 0 /* test for existence of file */
160: #define X_OK 0x01 /* test for execute or search permission */
161: #define W_OK 0x02 /* test for write permission */
162: #define R_OK 0x04 /* test for read permission */
163:
164: /* whence values for lseek(2) */
165: #define SEEK_SET 0 /* set file offset to offset */
166: #define SEEK_CUR 1 /* set file offset to current plus offset */
167: #define SEEK_END 2 /* set file offset to EOF plus offset */
168:
169: #define stdin (&__sF[0])
170: #define stdout (&__sF[1])
171: #define stderr (&__sF[2])
172:
173: /*
174: * Functions defined in ANSI C standard.
175: */
176: __BEGIN_DECLS
177: void clearerr(FILE *);
178: int fclose(FILE *);
179: int feof(FILE *);
180: int ferror(FILE *);
181: int fflush(FILE *);
182: int fgetc(FILE *);
183: int fgetpos(FILE *, fpos_t *);
184: char *fgets(char *, size_t, FILE *);
185: FILE *fopen(const char *, const char *);
186: int fprintf(FILE *, const char *, ...);
187: int fputc(int, FILE *);
188: int fputs(const char *, FILE *);
189: size_t fread(void *, size_t, size_t, FILE *);
190: FILE *freopen(const char *, const char *, FILE *);
191: int fscanf(FILE *, const char *, ...);
192: int fseek(FILE *, long, int);
193: int fsetpos(FILE *, const fpos_t *);
194: long ftell(FILE *);
195: size_t fwrite(const void *, size_t, size_t, FILE *);
196: int getc(FILE *);
197: int getchar(void);
198: char *gets(char *);
199: #if !defined(_ANSI_SOURCE) && !defined(_POSIX_SOURCE)
200: extern const int _sys_nerr; /* perror(3) external variables */
201: extern const char *const _sys_errlist[];
202: #endif
203: void perror(const char *);
204: int printf(const char *, ...);
205: int putc(int, FILE *);
206: int putchar(int);
207: int puts(const char *);
208: int remove(const char *);
209: int rename (const char *, const char *);
210: void rewind(FILE *);
211: int scanf(const char *, ...);
212: void setbuf(FILE *, char *);
213: int setvbuf(FILE *, char *, int, size_t);
214: int sprintf(char *, const char *, ...);
215: int sscanf(const char *, const char *, ...);
216: FILE *tmpfile(void);
217: char *tmpnam(char *);
218: int ungetc(int, FILE *);
219: int vfprintf(FILE *, const char *, _BSD_VA_LIST_);
220: int vprintf(const char *, _BSD_VA_LIST_);
221: int vsprintf(char *, const char *, _BSD_VA_LIST_);
222: __END_DECLS
223:
224: /*
225: * Functions defined in POSIX 1003.1.
226: */
227: #ifndef _ANSI_SOURCE
228: #define L_cuserid 9 /* size for cuserid(); UT_NAMESIZE + 1 */
229: #define L_ctermid 1024 /* size for ctermid(); PATH_MAX */
230:
231: __BEGIN_DECLS
232: char *ctermid(char *);
233: FILE *fdopen(int, const char *);
234: int fileno(FILE *);
235: __END_DECLS
236: #endif /* not ANSI */
237:
238: /*
239: * Routines that are purely local.
240: */
241: #if !defined (_ANSI_SOURCE) && !defined(_POSIX_SOURCE)
242: __BEGIN_DECLS
243: int fpurge(FILE *);
244: int getw(FILE *);
245: int pclose(FILE *);
246: FILE *popen(const char *, const char *);
247: int putw(int, FILE *);
248: void setbuffer(FILE *, char *, int);
249: int setlinebuf(FILE *);
250: char *tempnam(const char *, const char *);
251: int snprintf(char *, size_t, const char *, ...);
252: int vsnprintf(char *, size_t, const char *, _BSD_VA_LIST_);
253: int vscanf(const char *, _BSD_VA_LIST_);
254: int vsscanf(const char *, const char *, _BSD_VA_LIST_);
255: FILE *zopen(const char *, const char *, int);
256: __END_DECLS
257:
258: /*
259: * This is a #define because the function is used internally and
260: * (unlike vfscanf) the name __svfscanf is guaranteed not to collide
261: * with a user function when _ANSI_SOURCE or _POSIX_SOURCE is defined.
262: */
263: #define vfscanf __svfscanf
264:
265: #endif /* !_ANSI_SOURCE && !_POSIX_SOURCE */
266:
267: /*
268: * Functions internal to the implementation.
269: */
270: __BEGIN_DECLS
271: int __srget(FILE *);
272: int __svfscanf(FILE *, const char *, _BSD_VA_LIST_);
273: int __swbuf(int, FILE *);
274: __END_DECLS
275:
276: /*
277: * The __sfoo macros are here so that we can
278: * define function versions in the C library.
279: */
280:
281: #define __sfeof(p) (((p)->_flags & __SEOF) != 0)
282: #define __sferror(p) (((p)->_flags & __SERR) != 0)
283: #define __sclearerr(p) ((void)((p)->_flags &= ~(__SERR|__SEOF)))
284: #define __sfileno(p) ((p)->_file)
285:
286: #define feof(p) __sfeof(p)
287: #define ferror(p) __sferror(p)
288: #define clearerr(p) __sclearerr(p)
289:
290: #ifndef _ANSI_SOURCE
291: #define fileno(p) __sfileno(p)
292: #endif
293:
294: #endif /* _STDIO_H_ */
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