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Annotation of src/lib/libc/stdio/local.h, Revision 1.10

1.10    ! yamt        1: /*     $NetBSD: local.h,v 1.9 1998/07/27 16:05:07 mycroft Exp $        */
1.5       jtc         2:
1.1       cgd         3: /*-
1.5       jtc         4:  * Copyright (c) 1990, 1993
                      5:  *     The Regents of the University of California.  All rights reserved.
1.1       cgd         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. All advertising materials mentioning features or use of this software
                     19:  *    must display the following acknowledgement:
                     20:  *     This product includes software developed by the University of
                     21:  *     California, Berkeley and its contributors.
                     22:  * 4. Neither the name of the University nor the names of its contributors
                     23:  *    may be used to endorse or promote products derived from this software
                     24:  *    without specific prior written permission.
                     25:  *
                     26:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     27:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     28:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     29:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     30:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     31:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     32:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     33:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     34:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     35:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     36:  * SUCH DAMAGE.
                     37:  *
1.7       perry      38:  *     @(#)local.h     8.3 (Berkeley) 7/3/94
1.1       cgd        39:  */
                     40:
1.10    ! yamt       41: #include "wcio.h"
        !            42: #include "fileext.h"
        !            43:
1.1       cgd        44: /*
                     45:  * Information local to this implementation of stdio,
                     46:  * in particular, macros and private variables.
                     47:  */
                     48:
1.7       perry      49: extern int     __sflush __P((FILE *));
                     50: extern FILE    *__sfp __P((void));
                     51: extern int     __srefill __P((FILE *));
                     52: extern int     __sread __P((void *, char *, int));
                     53: extern int     __swrite __P((void *, char const *, int));
                     54: extern fpos_t  __sseek __P((void *, fpos_t, int));
                     55: extern int     __sclose __P((void *));
                     56: extern void    __sinit __P((void));
                     57: extern void    _cleanup __P((void));
                     58: extern void    (*__cleanup) __P((void));
                     59: extern void    __smakebuf __P((FILE *));
                     60: extern int     __swhatbuf __P((FILE *, size_t *, int *));
                     61: extern int     _fwalk __P((int (*)(FILE *)));
                     62: extern char    *_mktemp __P((char *));
                     63: extern int     __swsetup __P((FILE *));
                     64: extern int     __sflags __P((const char *, int *));
1.1       cgd        65:
1.7       perry      66: extern int     __sdidinit;
1.8       mycroft    67:
1.9       mycroft    68: extern int     __gettemp __P((char *, int *, int));
1.1       cgd        69:
                     70: /*
                     71:  * Return true iff the given FILE cannot be written now.
                     72:  */
                     73: #define        cantwrite(fp) \
                     74:        ((((fp)->_flags & __SWR) == 0 || (fp)->_bf._base == NULL) && \
                     75:         __swsetup(fp))
                     76:
                     77: /*
                     78:  * Test whether the given stdio file has an active ungetc buffer;
                     79:  * release such a buffer, without restoring ordinary unread data.
                     80:  */
1.10    ! yamt       81: #define        HASUB(fp) (_UB(fp)._base != NULL)
1.1       cgd        82: #define        FREEUB(fp) { \
1.10    ! yamt       83:        if (_UB(fp)._base != (fp)->_ubuf) \
        !            84:                free((char *)_UB(fp)._base); \
        !            85:        _UB(fp)._base = NULL; \
1.1       cgd        86: }
                     87:
                     88: /*
1.4       cgd        89:  * test for an fgetln() buffer.
1.1       cgd        90:  */
                     91: #define        HASLB(fp) ((fp)->_lb._base != NULL)
                     92: #define        FREELB(fp) { \
                     93:        free((char *)(fp)->_lb._base); \
                     94:        (fp)->_lb._base = NULL; \
                     95: }
1.10    ! yamt       96:

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