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