1 /* $NetBSD: local.h,v 1.29 2010/10/24 17:44:32 tron Exp $ */ 2 3 /*- 4 * Copyright (c) 1990, 1993 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 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)local.h 8.3 (Berkeley) 7/3/94 35 */ 36 37 #include "wcio.h" 38 #include "fileext.h" 39 40 #include <limits.h> 41 #include <stdbool.h> 42 43 /* 44 * Information local to this implementation of stdio, 45 * in particular, macros and private variables. 46 */ 47 48 extern int __sflush __P((FILE *)); 49 extern FILE *__sfp __P((void)); 50 extern void __sfpinit __P((FILE *)); 51 extern int __srefill __P((FILE *)); 52 extern int __sread __P((void *, char *, int)); 53 extern int __swrite __P((void *, char const *, int)); 54 extern fpos_t __sseek __P((void *, fpos_t, int)); 55 extern int __sclose __P((void *)); 56 extern void __sinit __P((void)); 57 extern void _cleanup __P((void)); 58 extern void (*__cleanup) __P((void)); 59 extern void __smakebuf __P((FILE *)); 60 extern int __swhatbuf __P((FILE *, size_t *, int *)); 61 extern int _fwalk __P((int (*)(FILE *))); 62 extern char *_mktemp __P((char *)); 63 extern int __swsetup __P((FILE *)); 64 extern int __sflags __P((const char *, int *)); 65 extern int __svfscanf __P((FILE * __restrict, const char * __restrict, 66 _BSD_VA_LIST_)) 67 __attribute__((__format__(__scanf__, 2, 0))); 68 extern int __svfscanf_unlocked __P((FILE * __restrict, const char * __restrict, 69 _BSD_VA_LIST_)) 70 __attribute__((__format__(__scanf__, 2, 0))); 71 extern int __vfprintf_unlocked __P((FILE * __restrict, const char * __restrict, 72 _BSD_VA_LIST_)); 73 74 75 extern int __sdidinit; 76 77 extern int __gettemp __P((char *, int *, int)); 78 79 extern wint_t __fgetwc_unlock __P((FILE *)); 80 extern wint_t __fputwc_unlock __P((wchar_t, FILE *)); 81 82 extern ssize_t __getdelim(char **__restrict, size_t *__restrict, int, 83 FILE *__restrict); 84 extern char *__fgetstr __P((FILE * __restrict, size_t * __restrict, int)); 85 extern int __vfwprintf_unlocked __P((FILE *, const wchar_t *, 86 _BSD_VA_LIST_)); 87 extern int __vfwscanf_unlocked __P((FILE * __restrict, 88 const wchar_t * __restrict, _BSD_VA_LIST_)); 89 90 /* 91 * Return true iff the given FILE cannot be written now. 92 */ 93 #define cantwrite(fp) \ 94 ((((fp)->_flags & __SWR) == 0 || (fp)->_bf._base == NULL) && \ 95 __swsetup(fp)) 96 97 /* 98 * Test whether the given stdio file has an active ungetc buffer; 99 * release such a buffer, without restoring ordinary unread data. 100 */ 101 #define HASUB(fp) (_UB(fp)._base != NULL) 102 #define FREEUB(fp) { \ 103 if (_UB(fp)._base != (fp)->_ubuf) \ 104 free((char *)_UB(fp)._base); \ 105 _UB(fp)._base = NULL; \ 106 } 107 108 /* 109 * test for an fgetln() buffer. 110 */ 111 #define FREELB(fp) { \ 112 free(_EXT(fp)->_fgetstr_buf); \ 113 _EXT(fp)->_fgetstr_buf = NULL; \ 114 _EXT(fp)->_fgetstr_len = 0; \ 115 } 116 117 extern void __flockfile_internal __P((FILE *, int)); 118 extern void __funlockfile_internal __P((FILE *, int)); 119 120 /* 121 * Detect if the current file position fits in a long int. 122 */ 123 124 static __inline bool 125 __fpos_overflow(fpos_t pos) 126 { 127 return (pos < LONG_MIN) || (pos > LONG_MAX); 128 } 129