| | 1 | /* |
| | 2 | * Copyright (c) 2000, 2005, 2007, 2009, 2010 Apple Inc. All rights reserved. |
| | 3 | * |
| | 4 | * @APPLE_LICENSE_HEADER_START@ |
| | 5 | * |
| | 6 | * This file contains Original Code and/or Modifications of Original Code |
| | 7 | * as defined in and that are subject to the Apple Public Source License |
| | 8 | * Version 2.0 (the 'License'). You may not use this file except in |
| | 9 | * compliance with the License. Please obtain a copy of the License at |
| | 10 | * http://www.opensource.apple.com/apsl/ and read it before using this |
| | 11 | * file. |
| | 12 | * |
| | 13 | * The Original Code and all software distributed under the License are |
| | 14 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
| | 15 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| | 16 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, |
| | 17 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. |
| | 18 | * Please see the License for the specific language governing rights and |
| | 19 | * limitations under the License. |
| | 20 | * |
| | 21 | * @APPLE_LICENSE_HEADER_END@ |
| | 22 | */ |
| | 23 | /*- |
| | 24 | * Copyright (c) 1990, 1993 |
| | 25 | * The Regents of the University of California. All rights reserved. |
| | 26 | * |
| | 27 | * This code is derived from software contributed to Berkeley by |
| | 28 | * Chris Torek. |
| | 29 | * |
| | 30 | * Redistribution and use in source and binary forms, with or without |
| | 31 | * modification, are permitted provided that the following conditions |
| | 32 | * are met: |
| | 33 | * 1. Redistributions of source code must retain the above copyright |
| | 34 | * notice, this list of conditions and the following disclaimer. |
| | 35 | * 2. Redistributions in binary form must reproduce the above copyright |
| | 36 | * notice, this list of conditions and the following disclaimer in the |
| | 37 | * documentation and/or other materials provided with the distribution. |
| | 38 | * 3. All advertising materials mentioning features or use of this software |
| | 39 | * must display the following acknowledgement: |
| | 40 | * This product includes software developed by the University of |
| | 41 | * California, Berkeley and its contributors. |
| | 42 | * 4. Neither the name of the University nor the names of its contributors |
| | 43 | * may be used to endorse or promote products derived from this software |
| | 44 | * without specific prior written permission. |
| | 45 | * |
| | 46 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| | 47 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| | 48 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| | 49 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| | 50 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| | 51 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| | 52 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| | 53 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| | 54 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| | 55 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| | 56 | * SUCH DAMAGE. |
| | 57 | * |
| | 58 | * @(#)stdio.h 8.5 (Berkeley) 4/29/95 |
| | 59 | */ |
| | 60 | |
| | 61 | /* |
| | 62 | * Common header for stdio.h and xlocale/_stdio.h |
| | 63 | */ |
| | 64 | |
| | 65 | #ifndef __STDIO_H_ |
| | 66 | #define __STDIO_H_ |
| | 67 | |
| | 68 | #include <sys/cdefs.h> |
| | 69 | #include <Availability.h> |
| | 70 | |
| | 71 | #include <_types.h> |
| | 72 | |
| | 73 | /* DO NOT REMOVE THIS COMMENT: fixincludes needs to see: |
| | 74 | * __gnuc_va_list and include <stdarg.h> */ |
| | 75 | #include <sys/_types/_va_list.h> |
| | 76 | #include <sys/_types/_size_t.h> |
| | 77 | #include <sys/_types/_null.h> |
| | 78 | |
| | 79 | #include <sys/stdio.h> |
| | 80 | |
| | 81 | typedef __darwin_off_t fpos_t; |
| | 82 | |
| | 83 | #define _FSTDIO /* Define for new stdio with functions. */ |
| | 84 | |
| | 85 | /* |
| | 86 | * NB: to fit things in six character monocase externals, the stdio |
| | 87 | * code uses the prefix `__s' for stdio objects, typically followed |
| | 88 | * by a three-character attempt at a mnemonic. |
| | 89 | */ |
| | 90 | |
| | 91 | /* stdio buffers */ |
| | 92 | struct __sbuf { |
| | 93 | unsigned char *_base; |
| | 94 | int _size; |
| | 95 | }; |
| | 96 | |
| | 97 | /* hold a buncha junk that would grow the ABI */ |
| | 98 | struct __sFILEX; |
| | 99 | |
| | 100 | /* |
| | 101 | * stdio state variables. |
| | 102 | * |
| | 103 | * The following always hold: |
| | 104 | * |
| | 105 | * if (_flags&(__SLBF|__SWR)) == (__SLBF|__SWR), |
| | 106 | * _lbfsize is -_bf._size, else _lbfsize is 0 |
| | 107 | * if _flags&__SRD, _w is 0 |
| | 108 | * if _flags&__SWR, _r is 0 |
| | 109 | * |
| | 110 | * This ensures that the getc and putc macros (or inline functions) never |
| | 111 | * try to write or read from a file that is in `read' or `write' mode. |
| | 112 | * (Moreover, they can, and do, automatically switch from read mode to |
| | 113 | * write mode, and back, on "r+" and "w+" files.) |
| | 114 | * |
| | 115 | * _lbfsize is used only to make the inline line-buffered output stream |
| | 116 | * code as compact as possible. |
| | 117 | * |
| | 118 | * _ub, _up, and _ur are used when ungetc() pushes back more characters |
| | 119 | * than fit in the current _bf, or when ungetc() pushes back a character |
| | 120 | * that does not match the previous one in _bf. When this happens, |
| | 121 | * _ub._base becomes non-nil (i.e., a stream has ungetc() data iff |
| | 122 | * _ub._base!=NULL) and _up and _ur save the current values of _p and _r. |
| | 123 | * |
| | 124 | * NB: see WARNING above before changing the layout of this structure! |
| | 125 | */ |
| | 126 | typedef struct __sFILE { |
| | 127 | unsigned char *_p; /* current position in (some) buffer */ |
| | 128 | int _r; /* read space left for getc() */ |
| | 129 | int _w; /* write space left for putc() */ |
| | 130 | short _flags; /* flags, below; this FILE is free if 0 */ |
| | 131 | short _file; /* fileno, if Unix descriptor, else -1 */ |
| | 132 | struct __sbuf _bf; /* the buffer (at least 1 byte, if !NULL) */ |
| | 133 | int _lbfsize; /* 0 or -_bf._size, for inline putc */ |
| | 134 | |
| | 135 | /* operations */ |
| | 136 | void *_cookie; /* cookie passed to io functions */ |
| | 137 | int (* _Nullable _close)(void *); |
| | 138 | int (* _Nullable _read) (void *, char *, int); |
| | 139 | fpos_t (* _Nullable _seek) (void *, fpos_t, int); |
| | 140 | int (* _Nullable _write)(void *, const char *, int); |
| | 141 | |
| | 142 | /* separate buffer for long sequences of ungetc() */ |
| | 143 | struct __sbuf _ub; /* ungetc buffer */ |
| | 144 | struct __sFILEX *_extra; /* additions to FILE to not break ABI */ |
| | 145 | int _ur; /* saved _r when _r is counting ungetc data */ |
| | 146 | |
| | 147 | /* tricks to meet minimum requirements even when malloc() fails */ |
| | 148 | unsigned char _ubuf[3]; /* guarantee an ungetc() buffer */ |
| | 149 | unsigned char _nbuf[1]; /* guarantee a getc() buffer */ |
| | 150 | |
| | 151 | /* separate buffer for fgetln() when line crosses buffer boundary */ |
| | 152 | struct __sbuf _lb; /* buffer for fgetln() */ |
| | 153 | |
| | 154 | /* Unix stdio files get aligned to block boundaries on fseek() */ |
| | 155 | int _blksize; /* stat.st_blksize (may be != _bf._size) */ |
| | 156 | fpos_t _offset; /* current lseek offset (see WARNING) */ |
| | 157 | } FILE; |
| | 158 | |
| | 159 | #endif /* __STDIO_H_ */ |
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