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