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  * 3. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *      This product includes software developed by the University of
  19  *      California, Berkeley and its contributors.
  20  * 4. Neither the name of the University nor the names of its contributors
  21  *    may be used to endorse or promote products derived from this software
  22  *    without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  *
  36  *      @(#)local.h     8.3 (Berkeley) 7/3/94
  37  * $FreeBSD: src/lib/libc/stdio/local.h,v 1.26 2004/07/16 05:52:51 tjr Exp $
  38  */
  39
  40 #include <sys/types.h>  /* for off_t */
  41 #include <pthread.h>
  42 #include <string.h>
  43 #include <wchar.h>
  44
  45 /*
  46  * Information local to this implementation of stdio,
  47  * in particular, macros and private variables.
  48  */
  49
  50 extern int      _sread(FILE *, char *, int);
  51 extern int      _swrite(FILE *, char const *, int);
  52 extern fpos_t   _sseek(FILE *, fpos_t, int);
  53 extern int      _ftello(FILE *, fpos_t *);
  54 extern int      _fseeko(FILE *, off_t, int, int);
  55 extern int      __fflush(FILE *fp);
  56 extern wint_t   __fgetwc(FILE *);
  57 extern wint_t   __fputwc(wchar_t, FILE *);
  58 extern int      __sflush(FILE *);
  59 extern FILE     *__sfp(void);
  60 extern int      __slbexpand(FILE *, size_t);
  61 extern int      __srefill(FILE *);
  62 extern int      __sread(void *, char *, int);
  63 extern int      __swrite(void *, char const *, int);
  64 extern fpos_t   __sseek(void *, fpos_t, int);
  65 extern int      __sclose(void *);
  66 extern void     __sinit(void);
  67 extern void     _cleanup(void);
  68 extern void     (*__cleanup)(void);
  69 extern void     __smakebuf(FILE *);
  70 extern int      __swhatbuf(FILE *, size_t *, int *);
  71 extern int      _fwalk(int (*)(FILE *));
  72 extern int      __svfscanf(FILE *, const char *, __va_list);
  73 extern int      __swsetup(FILE *);
  74 extern int      __sflags(const char *, int *);
  75 extern int      __ungetc(int, FILE *);
  76 extern wint_t   __ungetwc(wint_t, FILE *);
  77 extern int      __vfprintf(FILE *, const char *, __va_list);
  78 extern int      __vfscanf(FILE *, const char *, __va_list);
  79 extern int      __vfwprintf(FILE *, const wchar_t *, __va_list);
  80 extern int      __vfwscanf(FILE * __restrict, const wchar_t * __restrict,
  81                     __va_list);
  82
  83 extern int      __sdidinit;
  84
  85
  86 /* hold a buncha junk that would grow the ABI */
  87 struct __sFILEX {
  88         unsigned char   *_up;   /* saved _p when _p is doing ungetc data */
  89         pthread_mutex_t fl_mutex;       /* used for MT-safety */
  90         pthread_t       fl_owner;       /* current owner */
  91         int             fl_count;       /* recursive lock count */
  92         int             orientation;    /* orientation for fwide() */
  93         mbstate_t       mbstate;        /* multibyte conversion state */
  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 #define INITEXTRA(fp) { \
 126         (fp)->_extra->_up = NULL; \
 127         (fp)->_extra->fl_mutex = PTHREAD_MUTEX_INITIALIZER; \
 128         (fp)->_extra->fl_owner = NULL; \
 129         (fp)->_extra->fl_count = 0; \
 130         (fp)->_extra->orientation = 0; \
 131         memset(&(fp)->_extra->mbstate, 0, sizeof(mbstate_t)); \
 132 }
 133
 134 /*
 135  * Set the orientation for a stream. If o > 0, the stream has wide-
 136  * orientation. If o < 0, the stream has byte-orientation.
 137  */
 138 #define ORIENT(fp, o)   do {                            \
 139         if ((fp)->_extra->orientation == 0)             \
 140                 (fp)->_extra->orientation = (o);        \
 141 } while (0)