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 * 4. 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 * @(#)local.h 8.3 (Berkeley) 7/3/94 33 * $FreeBSD$ 34 */ 35 36 #include <sys/types.h> /* for off_t */ 37 #include <pthread.h> 38 #include <string.h> 39 #include <wchar.h> 40 41 /* 42 * Information local to this implementation of stdio, 43 * in particular, macros and private variables. 44 */ 45 46 extern int _sread(FILE *, char *, int); 47 extern int _swrite(FILE *, char const *, int); 48 extern fpos_t _sseek(FILE *, fpos_t, int); 49 extern int _ftello(FILE *, fpos_t *); 50 extern int _fseeko(FILE *, off_t, int, int); 51 extern int __fflush(FILE *fp); 52 extern void __fcloseall(void); 53 extern wint_t __fgetwc(FILE *); 54 extern wint_t __fputwc(wchar_t, FILE *); 55 extern int __sflush(FILE *); 56 extern FILE *__sfp(void); 57 extern int __slbexpand(FILE *, size_t); 58 extern int __srefill(FILE *); 59 extern int __sread(void *, char *, int); 60 extern int __swrite(void *, char const *, int); 61 extern fpos_t __sseek(void *, fpos_t, int); 62 extern int __sclose(void *); 63 extern void __sinit(void); 64 extern void _cleanup(void); 65 extern void __smakebuf(FILE *); 66 extern int __swhatbuf(FILE *, size_t *, int *); 67 extern int _fwalk(int (*)(FILE *)); 68 extern int __svfscanf(FILE *, const char *, __va_list); 69 extern int __swsetup(FILE *); 70 extern int __sflags(const char *, int *); 71 extern int __ungetc(int, FILE *); 72 extern wint_t __ungetwc(wint_t, FILE *); 73 extern int __vfprintf(FILE *, const char *, __va_list); 74 extern int __vfscanf(FILE *, const char *, __va_list); 75 extern int __vfwprintf(FILE *, const wchar_t *, __va_list); 76 extern int __vfwscanf(FILE * __restrict, const wchar_t * __restrict, 77 __va_list); 78 extern size_t __fread(void * __restrict buf, size_t size, size_t count, 79 FILE * __restrict fp); 80 extern int __sdidinit; 81 82 83 /* hold a buncha junk that would grow the ABI */ 84 struct __sFILEX { 85 unsigned char *_up; /* saved _p when _p is doing ungetc data */ 86 pthread_mutex_t fl_mutex; /* used for MT-safety */ 87 pthread_t fl_owner; /* current owner */ 88 int fl_count; /* recursive lock count */ 89 int orientation; /* orientation for fwide() */ 90 mbstate_t mbstate; /* multibyte conversion state */ 91 }; 92 93 /* 94 * Prepare the given FILE for writing, and return 0 iff it 95 * can be written now. Otherwise, return EOF and set errno. 96 */ 97 #define prepwrite(fp) \ 98 ((((fp)->_flags & __SWR) == 0 || \ 99 ((fp)->_bf._base == NULL && ((fp)->_flags & __SSTR) == 0)) && \ 100 __swsetup(fp)) 101 102 /* 103 * Test whether the given stdio file has an active ungetc buffer; 104 * release such a buffer, without restoring ordinary unread data. 105 */ 106 #define HASUB(fp) ((fp)->_ub._base != NULL) 107 #define FREEUB(fp) { \ 108 if ((fp)->_ub._base != (fp)->_ubuf) \ 109 free((char *)(fp)->_ub._base); \ 110 (fp)->_ub._base = NULL; \ 111 } 112 113 /* 114 * test for an fgetln() buffer. 115 */ 116 #define HASLB(fp) ((fp)->_lb._base != NULL) 117 #define FREELB(fp) { \ 118 free((char *)(fp)->_lb._base); \ 119 (fp)->_lb._base = NULL; \ 120 } 121 122 #define INITEXTRA(fp) { \ 123 (fp)->_extra->_up = NULL; \ 124 (fp)->_extra->fl_mutex = PTHREAD_MUTEX_INITIALIZER; \ 125 (fp)->_extra->fl_owner = NULL; \ 126 (fp)->_extra->fl_count = 0; \ 127 (fp)->_extra->orientation = 0; \ 128 memset(&(fp)->_extra->mbstate, 0, sizeof(mbstate_t)); \ 129 } 130 131 /* 132 * Set the orientation for a stream. If o > 0, the stream has wide- 133 * orientation. If o < 0, the stream has byte-orientation. 134 */ 135 #define ORIENT(fp, o) do { \ 136 if ((fp)->_extra->orientation == 0) \ 137 (fp)->_extra->orientation = (o); \ 138 } while (0) 139