1 /* 2 Copyright (c) 2010 - 2011, Intel Corporation. All rights reserved.<BR> 3 This program and the accompanying materials are licensed and made available 4 under the terms and conditions of the BSD License that accompanies this 5 distribution. The full text of the license may be found at 6 http://opensource.org/licenses/bsd-license. 7 8 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 9 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 10 11 * Copyright (c) 1990, 1993 12 * The Regents of the University of California. All rights reserved. 13 * 14 * This code is derived from software contributed to Berkeley by 15 * Chris Torek. 16 * 17 * Redistribution and use in source and binary forms, with or without 18 * modification, are permitted provided that the following conditions 19 * are met: 20 * 1. Redistributions of source code must retain the above copyright 21 * notice, this list of conditions and the following disclaimer. 22 * 2. Redistributions in binary form must reproduce the above copyright 23 * notice, this list of conditions and the following disclaimer in the 24 * documentation and/or other materials provided with the distribution. 25 * 3. Neither the name of the University nor the names of its contributors 26 * may be used to endorse or promote products derived from this software 27 * without specific prior written permission. 28 * 29 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 30 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 31 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 32 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 33 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 34 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 35 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 36 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 37 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 38 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 39 * SUCH DAMAGE. 40 41 NetBSD: wsetup.c,v 1.11 2003/08/07 16:43:35 agc Exp 42 wsetup.c 8.1 (Berkeley) 6/4/93 43 */ 44 #include <LibConfig.h> 45 #include <sys/EfiCdefs.h> 46 47 #include <assert.h> 48 #include <errno.h> 49 #include <stdio.h> 50 #include <stdlib.h> 51 #include "reentrant.h" 52 #include "local.h" 53 54 /* 55 * Various output routines call wsetup to be sure it is safe to write, 56 * because either _flags does not include __SWR, or _buf is NULL. 57 * _wsetup returns 0 if OK to write, nonzero otherwise. 58 */ 59 int 60 __swsetup(FILE *fp) 61 { 62 63 _DIAGASSERT(fp != NULL); 64 if(fp == NULL) { 65 errno = EINVAL; 66 return (-1); 67 } 68 69 /* make sure stdio is set up */ 70 if (!__sdidinit) 71 __sinit(); 72 73 /* 74 * If we are not writing, we had better be reading and writing. 75 */ 76 if ((fp->_flags & __SWR) == 0) { 77 if ((fp->_flags & __SRW) == 0) 78 return (EOF); 79 if (fp->_flags & __SRD) { 80 /* clobber any ungetc data */ 81 if (HASUB(fp)) 82 FREEUB(fp); 83 fp->_flags &= ~(__SRD|__SEOF); 84 fp->_r = 0; 85 fp->_p = fp->_bf._base; 86 } 87 fp->_flags |= __SWR; 88 } 89 90 /* 91 * Make a buffer if necessary, then set _w. 92 */ 93 if (fp->_bf._base == NULL) 94 __smakebuf(fp); 95 if (fp->_flags & __SLBF) { 96 /* 97 * It is line buffered, so make _lbfsize be -_bufsize 98 * for the putc() macro. We will change _lbfsize back 99 * to 0 whenever we turn off __SWR. 100 */ 101 fp->_w = 0; 102 fp->_lbfsize = -fp->_bf._size; 103 } else 104 fp->_w = fp->_flags & __SNBF ? 0 : fp->_bf._size; 105 return (0); 106 } 107
