Annotation of prex/usr/include/stdio.h, Revision 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: #if !defined(_SIZE_T)
! 42: #define _SIZE_T
! 43: typedef unsigned int size_t; /* size of something in bytes */
! 44: #endif
! 45:
! 46: #include <machine/stdarg.h>
! 47:
! 48: #ifndef NULL
! 49: #if !defined(__cplusplus)
! 50: #define NULL ((void *)0)
! 51: #else
! 52: #define NULL 0
! 53: #endif
! 54: #endif
! 55:
! 56: typedef off_t fpos_t;
! 57:
! 58: #define _FSTDIO /* Define for new stdio with functions. */
! 59:
! 60: /*
! 61: * NB: to fit things in six character monocase externals, the stdio
! 62: * code uses the prefix `__s' for stdio objects, typically followed
! 63: * by a three-character attempt at a mnemonic.
! 64: */
! 65:
! 66: /* stdio buffers */
! 67: struct __sbuf {
! 68: unsigned char *_base;
! 69: int _size;
! 70: };
! 71:
! 72: /*
! 73: * stdio state variables.
! 74: *
! 75: * The following always hold:
! 76: *
! 77: * if (_flags&(__SLBF|__SWR)) == (__SLBF|__SWR),
! 78: * _lbfsize is -_bf._size, else _lbfsize is 0
! 79: * if _flags&__SRD, _w is 0
! 80: * if _flags&__SWR, _r is 0
! 81: *
! 82: * This ensures that the getc and putc macros (or inline functions) never
! 83: * try to write or read from a file that is in `read' or `write' mode.
! 84: * (Moreover, they can, and do, automatically switch from read mode to
! 85: * write mode, and back, on "r+" and "w+" files.)
! 86: *
! 87: * _lbfsize is used only to make the inline line-buffered output stream
! 88: * code as compact as possible.
! 89: *
! 90: * _ub, _up, and _ur are used when ungetc() pushes back more characters
! 91: * than fit in the current _bf, or when ungetc() pushes back a character
! 92: * that does not match the previous one in _bf. When this happens,
! 93: * _ub._base becomes non-nil (i.e., a stream has ungetc() data iff
! 94: * _ub._base!=NULL) and _up and _ur save the current values of _p and _r.
! 95: *
! 96: * NB: see WARNING above before changing the layout of this structure!
! 97: */
! 98: typedef struct __sFILE {
! 99: struct __sFILE *next; /* file chain */
! 100: unsigned char *_p; /* current position in (some) buffer */
! 101: int _r; /* read space left for getc() */
! 102: int _w; /* write space left for putc() */
! 103: short _flags; /* flags, below; this FILE is free if 0 */
! 104: short _file; /* fileno, if Unix descriptor, else -1 */
! 105: struct __sbuf _bf; /* the buffer (at least 1 byte, if !NULL) */
! 106:
! 107: /* separate buffer for long sequences of ungetc() */
! 108: struct __sbuf _ub; /* ungetc buffer */
! 109: unsigned char *_up; /* saved _p when _p is doing ungetc data */
! 110: int _ur; /* saved _r when _r is counting ungetc data */
! 111:
! 112: /* tricks to meet minimum requirements even when malloc() fails */
! 113: unsigned char _ubuf[3]; /* guarantee an ungetc() buffer */
! 114: unsigned char _nbuf[1]; /* guarantee a getc() buffer */
! 115: } FILE;
! 116:
! 117: __BEGIN_DECLS
! 118: extern FILE __sF[];
! 119: __END_DECLS
! 120:
! 121: #define __SLBF 0x0001 /* line buffered */
! 122: #define __SNBF 0x0002 /* unbuffered */
! 123: #define __SRD 0x0004 /* OK to read */
! 124: #define __SWR 0x0008 /* OK to write */
! 125: /* RD and WR are never simultaneously asserted */
! 126: #define __SRW 0x0010 /* open for reading & writing */
! 127: #define __SEOF 0x0020 /* found EOF */
! 128: #define __SERR 0x0040 /* found error */
! 129: #define __SMBF 0x0080 /* _buf is from malloc */
! 130: #define __SAPP 0x0100 /* fdopen()ed in append mode */
! 131: #define __SSTR 0x0200 /* this is an sprintf/snprintf string */
! 132:
! 133: /*
! 134: * The following three definitions are for ANSI C, which took them
! 135: * from System V, which brilliantly took internal interface macros and
! 136: * made them official arguments to setvbuf(), without renaming them.
! 137: * Hence, these ugly _IOxxx names are *supposed* to appear in user code.
! 138: *
! 139: * Although numbered as their counterparts above, the implementation
! 140: * does not rely on this.
! 141: */
! 142: #define _IOFBF 0 /* setvbuf should set fully buffered */
! 143: #define _IOLBF 1 /* setvbuf should set line buffered */
! 144: #define _IONBF 2 /* setvbuf should set unbuffered */
! 145:
! 146: #define BUFSIZ 512 /* size of buffer used by setbuf */
! 147: #define EOF (-1)
! 148:
! 149: /*
! 150: * FOPEN_MAX is a minimum maximum, and is the number of streams that
! 151: * stdio can provide without attempting to allocate further resources
! 152: * (which could fail). Do not use this for anything.
! 153: */
! 154: /* must be == _POSIX_STREAM_MAX <limits.h> */
! 155: #define FOPEN_MAX 16 /* must be <= OPEN_MAX <sys/syslimits.h> */
! 156: #define FILENAME_MAX 256 /* must be <= PATH_MAX <sys/syslimits.h> */
! 157:
! 158: /* System V/ANSI C; this is the wrong way to do this, do *not* use these. */
! 159: #ifndef _ANSI_SOURCE
! 160: #define P_tmpdir "/var/tmp/"
! 161: #endif
! 162: #define L_tmpnam 255 /* XXX must be == PATH_MAX */
! 163: #define TMP_MAX 308915776
! 164:
! 165: /* access function */
! 166: #define F_OK 0 /* test for existence of file */
! 167: #define X_OK 0x01 /* test for execute or search permission */
! 168: #define W_OK 0x02 /* test for write permission */
! 169: #define R_OK 0x04 /* test for read permission */
! 170:
! 171: /* whence values for lseek(2) */
! 172: #define SEEK_SET 0 /* set file offset to offset */
! 173: #define SEEK_CUR 1 /* set file offset to current plus offset */
! 174: #define SEEK_END 2 /* set file offset to EOF plus offset */
! 175:
! 176: #define stdin (&__sF[0])
! 177: #define stdout (&__sF[1])
! 178: #define stderr (&__sF[2])
! 179:
! 180: /*
! 181: * Functions defined in ANSI C standard.
! 182: */
! 183: __BEGIN_DECLS
! 184: void clearerr(FILE *);
! 185: int fclose(FILE *);
! 186: int feof(FILE *);
! 187: int ferror(FILE *);
! 188: int fflush(FILE *);
! 189: int fgetc(FILE *);
! 190: int fgetpos(FILE *, fpos_t *);
! 191: char *fgets(char *, size_t, FILE *);
! 192: FILE *fopen(const char *, const char *);
! 193: int fprintf(FILE *, const char *, ...);
! 194: int fputc(int, FILE *);
! 195: int fputs(const char *, FILE *);
! 196: size_t fread(void *, size_t, size_t, FILE *);
! 197: FILE *freopen(const char *, const char *, FILE *);
! 198: int fscanf(FILE *, const char *, ...);
! 199: int fseek(FILE *, long, int);
! 200: int fsetpos(FILE *, const fpos_t *);
! 201: long ftell(FILE *);
! 202: size_t fwrite(const void *, size_t, size_t, FILE *);
! 203: int getc(FILE *);
! 204: int getchar(void);
! 205: char *gets(char *);
! 206: #if !defined(_ANSI_SOURCE) && !defined(_POSIX_SOURCE)
! 207: extern const int _sys_nerr; /* perror(3) external variables */
! 208: extern const char *const _sys_errlist[];
! 209: #endif
! 210: void perror(const char *);
! 211: int printf(const char *, ...);
! 212: int putc(int, FILE *);
! 213: int putchar(int);
! 214: int puts(const char *);
! 215: int remove(const char *);
! 216: int rename (const char *, const char *);
! 217: void rewind(FILE *);
! 218: int scanf(const char *, ...);
! 219: void setbuf(FILE *, char *);
! 220: int setvbuf(FILE *, char *, int, size_t);
! 221: int sprintf(char *, const char *, ...);
! 222: int sscanf(const char *, const char *, ...);
! 223: FILE *tmpfile(void);
! 224: char *tmpnam(char *);
! 225: int ungetc(int, FILE *);
! 226: int vfprintf(FILE *, const char *, va_list);
! 227: int vprintf(const char *, va_list);
! 228: int vsprintf(char *, const char *, va_list);
! 229: __END_DECLS
! 230:
! 231: /*
! 232: * Functions defined in POSIX 1003.1.
! 233: */
! 234: #ifndef _ANSI_SOURCE
! 235: #define L_cuserid 9 /* size for cuserid(); UT_NAMESIZE + 1 */
! 236: #define L_ctermid 1024 /* size for ctermid(); PATH_MAX */
! 237:
! 238: __BEGIN_DECLS
! 239: char *ctermid(char *);
! 240: FILE *fdopen(int, const char *);
! 241: int fileno(FILE *);
! 242: __END_DECLS
! 243: #endif /* not ANSI */
! 244:
! 245: /*
! 246: * Routines that are purely local.
! 247: */
! 248: #if !defined (_ANSI_SOURCE) && !defined(_POSIX_SOURCE)
! 249: __BEGIN_DECLS
! 250: int fpurge(FILE *);
! 251: int getw(FILE *);
! 252: int pclose(FILE *);
! 253: FILE *popen(const char *, const char *);
! 254: int putw(int, FILE *);
! 255: void setbuffer(FILE *, char *, int);
! 256: int setlinebuf(FILE *);
! 257: char *tempnam(const char *, const char *);
! 258: int snprintf(char *, size_t, const char *, ...);
! 259: int vsnprintf(char *, size_t, const char *, va_list);
! 260: int vscanf(const char *, va_list);
! 261: int vsscanf(const char *, const char *, va_list);
! 262: FILE *zopen(const char *, const char *, int);
! 263: __END_DECLS
! 264:
! 265: /*
! 266: * This is a #define because the function is used internally and
! 267: * (unlike vfscanf) the name __svfscanf is guaranteed not to collide
! 268: * with a user function when _ANSI_SOURCE or _POSIX_SOURCE is defined.
! 269: */
! 270: #define vfscanf __svfscanf
! 271:
! 272: #endif /* !_ANSI_SOURCE && !_POSIX_SOURCE */
! 273:
! 274: /*
! 275: * Functions internal to the implementation.
! 276: */
! 277: __BEGIN_DECLS
! 278: int __srget(FILE *);
! 279: int __svfscanf(FILE *, const char *, va_list);
! 280: int __swbuf(int, FILE *);
! 281: __END_DECLS
! 282:
! 283: /*
! 284: * The __sfoo macros are here so that we can
! 285: * define function versions in the C library.
! 286: */
! 287:
! 288: #define __sfeof(p) (((p)->_flags & __SEOF) != 0)
! 289: #define __sferror(p) (((p)->_flags & __SERR) != 0)
! 290: #define __sclearerr(p) ((void)((p)->_flags &= ~(__SERR|__SEOF)))
! 291: #define __sfileno(p) ((p)->_file)
! 292:
! 293: #define feof(p) __sfeof(p)
! 294: #define ferror(p) __sferror(p)
! 295: #define clearerr(p) __sclearerr(p)
! 296:
! 297: #ifndef _ANSI_SOURCE
! 298: #define fileno(p) __sfileno(p)
! 299: #endif
! 300:
! 301: #endif /* _STDIO_H_ */
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