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  * 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  * $DragonFly: src/lib/libc/stdio/local.h,v 1.11 2007/11/25 01:28:22 swildner Exp $
  35  */
  36
  37 #include <sys/types.h>  /* for off_t */
  38 #include <pthread.h>
  39 #include <string.h>
  40 #include <wchar.h>
  41
  42 #include "wcio.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 *, const char *, 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_unlock(FILE *);
  57 extern wint_t   __fputwc_unlock(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 *, const char *, 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     __smakebuf(FILE *);
  69 extern int      __swhatbuf(FILE *, size_t *, int *);
  70 extern int      _fwalk(int (*)(FILE *));
  71 extern int      __svfscanf(FILE *, const char *, __va_list);
  72 extern int      __swsetup(FILE *);
  73 extern int      __sflags(const char *, int *);
  74 extern int      __ungetc(int, FILE *);
  75 extern int      __vfprintf(FILE *, const char *, __va_list);
  76 extern int      __vfscanf(FILE *, const char *, __va_list);
  77 extern int      __vfwprintf(FILE *, const wchar_t *, __va_list);
  78 extern int      __vfwscanf(FILE * __restrict, const wchar_t * __restrict,
  79                            __va_list);
  80 extern size_t   __fread(void * __restrict buf, size_t size, size_t count,
  81                         FILE * __restrict fp);
  82 extern int      __sdidinit;
  83
  84
  85 /*
  86  * Prepare the given FILE for writing, and return 0 iff it
  87  * can be written now.  Otherwise, return EOF and set errno.
  88  */
  89 #define prepwrite(fp) \
  90         ((((fp)->pub._flags & __SWR) == 0 || \
  91             ((fp)->_bf._base == NULL && ((fp)->pub._flags & __SSTR) == 0)) && \
  92          __swsetup(fp))
  93
  94 /*
  95  * Test whether the given stdio file has an active ungetc buffer;
  96  * release such a buffer, without restoring ordinary unread data.
  97  */
  98 #define HASUB(fp) ((fp)->_ub._base != NULL)
  99 #define FREEUB(fp) { \
 100         if ((fp)->_ub._base != (fp)->_ubuf) \
 101                 free((char *)(fp)->_ub._base); \
 102         (fp)->_ub._base = NULL; \
 103 }
 104
 105 /*
 106  * test for an fgetln() buffer.
 107  */
 108 #define HASLB(fp) ((fp)->_lb._base != NULL)
 109 #define FREELB(fp) { \
 110         free((char *)(fp)->_lb._base); \
 111         (fp)->_lb._base = NULL; \
 112 }
 113
 114 /*
 115  * Set the orientation for a stream. If o > 0, the stream has wide-
 116  * orientation. If o < 0, the stream has byte-orientation.
 117  */
 118 #define ORIENT(fp, o)   _SET_ORIENTATION(fp, o)