1 /* $NetBSD: local.h,v 1.37 2013/10/04 20:49:16 christos 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 <stdarg.h> 42 #include <stdbool.h> 43 44 /* 45 * Information local to this implementation of stdio, 46 * in particular, macros and private variables. 47 */ 48 49 extern int __sflush(FILE *); 50 extern FILE *__sfp(void); 51 extern void __sfpinit(FILE *); 52 extern int __srefill(FILE *); 53 extern ssize_t __sread(void *, void *, size_t); 54 extern ssize_t __swrite(void *, const void *, size_t); 55 extern off_t __sseek(void *, off_t, int); 56 extern int __sclose(void *); 57 extern void __sinit(void); 58 extern void _cleanup(void); 59 extern void (*__cleanup)(void); 60 extern void __smakebuf(FILE *); 61 extern int __swhatbuf(FILE *, size_t *, int *); 62 extern int _fwalk(int (*)(FILE *)); 63 extern char *_mktemp(char *); 64 extern int __swsetup(FILE *); 65 extern int __sflags(const char *, int *); 66 extern int __svfscanf(FILE * __restrict, const char * __restrict, 67 va_list) __scanflike(2, 0); 68 extern int __svfscanf_l(FILE * __restrict, locale_t, 69 const char * __restrict, va_list) __scanflike(3, 0); 70 extern int __svfscanf_unlocked_l(FILE * __restrict, locale_t, 71 const char * __restrict, va_list) __scanflike(3, 0); 72 extern int __vfprintf_unlocked_l(FILE * __restrict, locale_t, 73 const char * __restrict, va_list) __printflike(3, 0); 74 75 76 extern int __sdidinit; 77 78 extern int __gettemp(char *, int *, int); 79 80 extern wint_t __fgetwc_unlock(FILE *); 81 extern wint_t __fputwc_unlock(wchar_t, FILE *); 82 83 extern ssize_t __getdelim(char **__restrict, size_t *__restrict, int, 84 FILE *__restrict); 85 extern char *__fgetstr(FILE * __restrict, size_t * __restrict, int); 86 extern int __vfwprintf_unlocked_l(FILE *, locale_t, const wchar_t *, va_list); 87 extern int __vfwscanf_unlocked_l(FILE * __restrict, locale_t, 88 const wchar_t * __restrict, 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(FILE *, int); 118 extern void __funlockfile_internal(FILE *, int); 119 120 extern char *__gets(char *); 121 122 /* 123 * Detect if the current file position fits in a long int. 124 */ 125 126 static __inline bool 127 __long_overflow(off_t pos) 128 { 129 return (pos < LONG_MIN) || (pos > LONG_MAX); 130 } 131