snprintf/local.h

   1 /*      $OpenBSD: local.h,v 1.14 2009/10/22 01:23:16 guenther Exp $     */
   2
   3 /*-
   4  * Copyright (c) 1990, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * This code is derived from software contributed to Berkeley by
   8  * Chris Torek.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  */
  34
  35 /*
  36  * Information local to this implementation of stdio,
  37  * in particular, macros and private variables.
  38  */
  39
  40 #include <wchar.h>
  41 #include "various.h"
  42 #include "wcio.h"
  43 #include "fileext.h"
  44
  45 int     __sflush(LFILE *);
  46 LFILE   *__sfp(void);
  47 int     __srefill(LFILE *);
  48 int     __sread(void *, char *, int);
  49 int     __swrite(void *, const char *, int);
  50 fpos_t  __sseek(void *, fpos_t, int);
  51 int     __sclose(void *);
  52 void    __sinit(void);
  53 void    _cleanup(void);
  54 void    __smakebuf(LFILE *);
  55 int     __swhatbuf(LFILE *, size_t *, int *);
  56 int     _fwalk(int (*)(LFILE *));
  57 int     __swsetup(LFILE *);
  58 int     __sflags(const char *, int *);
  59 wint_t __fgetwc_unlock(LFILE *);
  60
  61 extern void __atexit_register_cleanup(void (*)(void));
  62 extern int __sdidinit;
  63
  64 /*
  65  * Return true if the given LFILE cannot be written now.
  66  */
  67 #define cantwrite(fp) \
  68         ((((fp)->_flags & __SWR) == 0 || (fp)->_bf._base == NULL) && \
  69          __swsetup(fp))
  70
  71 /*
  72  * Test whether the given stdio file has an active ungetc buffer;
  73  * release such a buffer, without restoring ordinary unread data.
  74  */
  75 #define HASUB(fp) (_UB(fp)._base != NULL)
  76 #define FREEUB(fp) { \
  77         if (_UB(fp)._base != (fp)->_ubuf) \
  78                 free(_UB(fp)._base); \
  79         _UB(fp)._base = NULL; \
  80 }
  81
  82 /*
  83  * test for an fgetln() buffer.
  84  */
  85 #define HASLB(fp) ((fp)->_lb._base != NULL)
  86 #define FREELB(fp) { \
  87         free((char *)(fp)->_lb._base); \
  88         (fp)->_lb._base = NULL; \
  89 }