lib/libc/stdio/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  *
  38  * $FreeBSD: src/lib/libc/stdio/local.h,v 1.1.1.2.6.1 2001/03/05 11:27:49 obrien Exp $
  39  * $DragonFly: src/lib/libc/stdio/local.h,v 1.11 2007/11/25 01:28:22 swildner Exp $
  40  */
  41
  42 #include <sys/types.h> /* for off_t */
  43 #include <string.h>
  44 #include <wchar.h> /* for wchar_t */
  45
  46 #ifndef _MACHINE_STDINT_H_
  47 #include <machine/stdint.h>     /* __size_t */
  48 #endif
  49
  50 /*
  51  * Information local to this implementation of stdio,
  52  * in particular, macros and private variables.
  53  */
  54
  55 extern int      __slbexpand(FILE *, size_t);
  56 extern int      __sflush (FILE *);
  57 extern FILE     *__sfp (void);
  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     (*__cleanup) (void);
  66 extern void     __smakebuf (FILE *);
  67 extern int      __swhatbuf (FILE *, __size_t *, int *);
  68 extern int      _fwalk (int (*)(FILE *));
  69 extern int      __swsetup (FILE *);
  70 extern int      __sflags (const char *, int *);
  71 extern int      __vfprintf(FILE *, const char *, __va_list);
  72 extern wint_t   __fgetwc_unlock(FILE *);
  73 extern wint_t   __fputwc_unlock(wchar_t, FILE *);
  74 extern int      __vfwprintf_unlocked(FILE *, const wchar_t *, __va_list);
  75 extern size_t   __fread(void *buf, size_t size, size_t count, FILE *fp);
  76
  77 extern int      __sdidinit;
  78
  79 /*
  80  * Return true iff the given FILE cannot be written now.
  81  */
  82 #define cantwrite(fp) \
  83         ((((fp)->pub._flags & __SWR) == 0 || (fp)->_bf._base == NULL) && \
  84          __swsetup(fp))
  85
  86 /*
  87  * Test whether the given stdio file has an active ungetc buffer;
  88  * release such a buffer, without restoring ordinary unread data.
  89  */
  90 #define HASUB(fp) ((fp)->_ub._base != NULL)
  91 #define FREEUB(fp) { \
  92         if ((fp)->_ub._base != (fp)->_ubuf) \
  93                 free((char *)(fp)->_ub._base); \
  94         (fp)->_ub._base = NULL; \
  95 }
  96
  97 /*
  98  * test for an fgetln() buffer.
  99  */
 100 #define HASLB(fp) ((fp)->_lb._base != NULL)
 101 #define FREELB(fp) { \
 102         free((char *)(fp)->_lb._base); \
 103         (fp)->_lb._base = NULL; \
 104 }