1 /*- 2 * Copyright (c) 1990 The Regents of the University of California. 3 * 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 * from: @(#)local.h 5.3 (Berkeley) 5/6/93 37 * $Id: local.h,v 1.4 1994/01/04 05:38:22 cgd Exp $ 38 */ 39 40 /* 41 * Information local to this implementation of stdio, 42 * in particular, macros and private variables. 43 */ 44 45 int __sflush __P((FILE *)); 46 FILE *__sfp __P((void)); 47 int __srefill __P((FILE *)); 48 int __sread __P((void *, char *, int)); 49 int __swrite __P((void *, char const *, int)); 50 fpos_t __sseek __P((void *, fpos_t, int)); 51 int __sclose __P((void *)); 52 void __sinit __P((void)); 53 void _cleanup __P((void)); 54 void (*__cleanup) __P((void)); 55 void __smakebuf __P((FILE *)); 56 int __swhatbuf __P((FILE *, size_t *, int *)); 57 int _fwalk __P((int (*)(FILE *))); 58 int __swsetup __P((FILE *)); 59 int __sflags __P((const char *, int *)); 60 61 extern int __sdidinit; 62 63 /* 64 * Return true iff the given FILE cannot be written now. 65 */ 66 #define cantwrite(fp) \ 67 ((((fp)->_flags & __SWR) == 0 || (fp)->_bf._base == NULL) && \ 68 __swsetup(fp)) 69 70 /* 71 * Test whether the given stdio file has an active ungetc buffer; 72 * release such a buffer, without restoring ordinary unread data. 73 */ 74 #define HASUB(fp) ((fp)->_ub._base != NULL) 75 #define FREEUB(fp) { \ 76 if ((fp)->_ub._base != (fp)->_ubuf) \ 77 free((char *)(fp)->_ub._base); \ 78 (fp)->_ub._base = NULL; \ 79 } 80 81 /* 82 * test for an fgetln() buffer. 83 */ 84 #define HASLB(fp) ((fp)->_lb._base != NULL) 85 #define FREELB(fp) { \ 86 free((char *)(fp)->_lb._base); \ 87 (fp)->_lb._base = NULL; \ 88 } 89