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 * Copyright (c) 2011 The FreeBSD Foundation 9 * All rights reserved. 10 * Portions of this software were developed by David Chisnall 11 * under sponsorship from the FreeBSD Foundation. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 4. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * @(#)local.h 8.3 (Berkeley) 7/3/94 38 * $FreeBSD$ 39 */ 40 41 #include <sys/types.h> /* for off_t */ 42 #include <pthread.h> 43 #include <string.h> 44 #include <wchar.h> 45 #include <locale.h> 46 47 /* 48 * Information local to this implementation of stdio, 49 * in particular, macros and private variables. 50 */ 51 52 extern int _sread(FILE *, char *, int); 53 extern int _swrite(FILE *, char const *, int); 54 extern fpos_t _sseek(FILE *, fpos_t, int); 55 extern int _ftello(FILE *, fpos_t *); 56 extern int _fseeko(FILE *, off_t, int, int); 57 extern int __fflush(FILE *fp); 58 extern void __fcloseall(void); 59 extern wint_t __fgetwc_mbs(FILE *, mbstate_t *, int *, locale_t); 60 extern wint_t __fputwc(wchar_t, FILE *, locale_t); 61 extern int __sflush(FILE *); 62 extern FILE *__sfp(void); 63 extern int __slbexpand(FILE *, size_t); 64 extern int __srefill(FILE *); 65 extern int __sread(void *, char *, int); 66 extern int __swrite(void *, char const *, int); 67 extern fpos_t __sseek(void *, fpos_t, int); 68 extern int __sclose(void *); 69 extern void __sinit(void); 70 extern void _cleanup(void); 71 extern void __smakebuf(FILE *); 72 extern int __swhatbuf(FILE *, size_t *, int *); 73 extern int _fwalk(int (*)(FILE *)); 74 extern int __svfscanf(FILE *, locale_t, const char *, __va_list); 75 extern int __swsetup(FILE *); 76 extern int __sflags(const char *, int *); 77 extern int __ungetc(int, FILE *); 78 extern wint_t __ungetwc(wint_t, FILE *, locale_t); 79 extern int __vfprintf(FILE *, locale_t, const char *, __va_list); 80 extern int __vfscanf(FILE *, const char *, __va_list); 81 extern int __vfwprintf(FILE *, locale_t, const wchar_t *, __va_list); 82 extern int __vfwscanf(FILE * __restrict, locale_t, const wchar_t * __restrict, 83 __va_list); 84 extern size_t __fread(void * __restrict buf, size_t size, size_t count, 85 FILE * __restrict fp); 86 extern int __sdidinit; 87 88 static inline wint_t 89 __fgetwc(FILE *fp, locale_t locale) 90 { 91 int nread; 92 93 return (__fgetwc_mbs(fp, &fp->_mbstate, &nread, locale)); 94 } 95 96 /* 97 * Prepare the given FILE for writing, and return 0 iff it 98 * can be written now. Otherwise, return EOF and set errno. 99 */ 100 #define prepwrite(fp) \ 101 ((((fp)->_flags & __SWR) == 0 || \ 102 ((fp)->_bf._base == NULL && ((fp)->_flags & __SSTR) == 0)) && \ 103 __swsetup(fp)) 104 105 /* 106 * Test whether the given stdio file has an active ungetc buffer; 107 * release such a buffer, without restoring ordinary unread data. 108 */ 109 #define HASUB(fp) ((fp)->_ub._base != NULL) 110 #define FREEUB(fp) { \ 111 if ((fp)->_ub._base != (fp)->_ubuf) \ 112 free((char *)(fp)->_ub._base); \ 113 (fp)->_ub._base = NULL; \ 114 } 115 116 /* 117 * test for an fgetln() buffer. 118 */ 119 #define HASLB(fp) ((fp)->_lb._base != NULL) 120 #define FREELB(fp) { \ 121 free((char *)(fp)->_lb._base); \ 122 (fp)->_lb._base = NULL; \ 123 } 124 125 /* 126 * Structure initializations for 'fake' FILE objects. 127 */ 128 #define FAKE_FILE { \ 129 ._file = -1, \ 130 ._fl_mutex = PTHREAD_MUTEX_INITIALIZER, \ 131 } 132 133 /* 134 * Set the orientation for a stream. If o > 0, the stream has wide- 135 * orientation. If o < 0, the stream has byte-orientation. 136 */ 137 #define ORIENT(fp, o) do { \ 138 if ((fp)->_orientation == 0) \ 139 (fp)->_orientation = (o); \ 140 } while (0) 141