stdio/FreeBSD/local.h

   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: src/lib/libc/stdio/local.h,v 1.33 2008/05/05 16:03:52 jhb Exp $
  34  */
  35
  36 #include <sys/cdefs.h>
  37 #include "xlocale_private.h"
  38 #include <sys/types.h>  /* for off_t */
  39 #include <pthread.h>
  40 #include <limits.h>
  41 #include <string.h>
  42 #include <wchar.h>
  43
  44 /*
  45  * Information local to this implementation of stdio,
  46  * in particular, macros and private variables.
  47  */
  48
  49 extern int      _sread(FILE *, char *, int);
  50 extern int      _swrite(FILE *, char const *, int);
  51 extern fpos_t   _sseek(FILE *, fpos_t, int);
  52 extern int      _ftello(FILE *, fpos_t *);
  53 extern int      _fseeko(FILE *, off_t, int, int);
  54 extern int      __fflush(FILE *fp);
  55 extern void     __fcloseall(void);
  56 extern wint_t   __fgetwc(FILE *, locale_t);
  57 extern wint_t   __fputwc(wchar_t, FILE *, locale_t);
  58 extern int      __sflush(FILE *);
  59 extern FILE     *__sfp(int);
  60 extern void     __sfprelease(FILE *);   /* mark free and update count as needed */
  61 extern int      __slbexpand(FILE *, size_t);
  62 extern int      __srefill(FILE *);
  63 extern int      __srefill0(FILE *);
  64 extern int      __srefill1(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     (*__cleanup)(void);
  72 extern void     __smakebuf(FILE *);
  73 extern int      __swhatbuf(FILE *, size_t *, int *);
  74 extern int      _fwalk(int (*)(FILE *));
  75 extern int      __svfscanf_l(FILE *, locale_t, const char *, __va_list);
  76 extern int      __swsetup(FILE *);
  77 extern int      __sflags(const char *, int *);
  78 extern int      __ungetc(int, FILE *);
  79 extern wint_t   __ungetwc(wint_t, FILE *, locale_t);
  80 extern int      __vfprintf(FILE *, locale_t, const char *, __va_list);
  81 extern int      __vfscanf(FILE *, const char *, __va_list);
  82 extern int      __vfwprintf(FILE *, locale_t, const wchar_t *, __va_list);
  83 extern int      __vfwscanf(FILE * __restrict, locale_t, const wchar_t * __restrict,
  84                     __va_list);
  85 extern size_t   __fread(void * __restrict buf, size_t size, size_t count,
  86                 FILE * __restrict fp);
  87 extern int      __sdidinit;
  88
  89
  90 /* hold a buncha junk that would grow the ABI */
  91 struct __sFILEX {
  92         unsigned char   *up;    /* saved _p when _p is doing ungetc data */
  93         pthread_mutex_t fl_mutex;       /* used for MT-safety */
  94         pthread_t       fl_owner;       /* current owner */
  95         int             fl_count;       /* recursive lock count */
  96         int             orientation:2;  /* orientation for fwide() */
  97         int             counted:1;      /* stream counted against STREAM_MAX */
  98         mbstate_t       mbstate;        /* multibyte conversion state */
  99 };
 100
 101 #define _up             _extra->up
 102 #define _fl_mutex       _extra->fl_mutex
 103 #define _fl_owner       _extra->fl_owner
 104 #define _fl_count       _extra->fl_count
 105 #define _orientation    _extra->orientation
 106 #define _mbstate        _extra->mbstate
 107 #define _counted        _extra->counted
 108
 109 #define INITEXTRA(fp) do { \
 110         (fp)->_extra->up = NULL; \
 111         (fp)->_extra->fl_mutex = (pthread_mutex_t)PTHREAD_MUTEX_INITIALIZER; \
 112         (fp)->_extra->fl_owner = NULL; \
 113         (fp)->_extra->fl_count = 0; \
 114         (fp)->_extra->orientation = 0; \
 115         memset(&(fp)->_extra->mbstate, 0, sizeof(mbstate_t)); \
 116         (fp)->_extra->counted = 0; \
 117 } while(0);
 118
 119 /*
 120  * Prepare the given FILE for writing, and return 0 iff it
 121  * can be written now.  Otherwise, return EOF and set errno.
 122  */
 123 #define prepwrite(fp) \
 124         ((((fp)->_flags & __SWR) == 0 || \
 125             ((fp)->_bf._base == NULL && ((fp)->_flags & __SSTR) == 0)) && \
 126          __swsetup(fp))
 127
 128 /*
 129  * Test whether the given stdio file has an active ungetc buffer;
 130  * release such a buffer, without restoring ordinary unread data.
 131  */
 132 #define HASUB(fp) ((fp)->_ub._base != NULL)
 133 #define FREEUB(fp) { \
 134         if ((fp)->_ub._base != (fp)->_ubuf) \
 135                 free((char *)(fp)->_ub._base); \
 136         (fp)->_ub._base = NULL; \
 137 }
 138
 139 /*
 140  * test for an fgetln() buffer.
 141  */
 142 #define HASLB(fp) ((fp)->_lb._base != NULL)
 143 #define FREELB(fp) { \
 144         free((char *)(fp)->_lb._base); \
 145         (fp)->_lb._base = NULL; \
 146 }
 147
 148 /*
 149  * Set the orientation for a stream. If o > 0, the stream has wide-
 150  * orientation. If o < 0, the stream has byte-orientation.
 151  */
 152 #define ORIENT(fp, o)   do {                            \
 153         if ((fp)->_orientation == 0)                    \
 154                 (fp)->_orientation = (o);               \
 155 } while (0)