78 lines
3.0 KiB
C
78 lines
3.0 KiB
C
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/* $NetBSD: fsort.h,v 1.9 2001/05/14 21:45:20 jdolecek Exp $ */
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/*-
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* Copyright (c) 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Peter McIlroy.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)fsort.h 8.1 (Berkeley) 6/6/93
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*/
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#define BUFSIZE (1<<20)
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#define MAXNUM 131072 /* low guess at average record count */
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#define BUFFEND (EOF-2)
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#define MAXFCT 1000
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#define DEFLLEN 65536
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/*
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* Default (initial) and maximum size of record buffer for fsort().
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* Note that no more than MAXNUM records are stored in the buffer,
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* even if the buffer is not full yet.
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*/
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#define DEFBUFSIZE (1 << 20) /* 1MB */
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#define MAXBUFSIZE (8 << 20) /* 10 MB */
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/*
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* Number of files merge() can merge in one pass.
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* This should be power of two so that it's possible to use this value
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* for rouding.
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*/
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#define MERGE_FNUM 16
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extern u_char *buffer, *linebuf;
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extern size_t bufsize, linebuf_size;
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/* temp files in the stack have a file descriptor, a largest bin (maxb)
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* which becomes the last non-empty bin (lastb) when the actual largest
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* bin is smaller than max(half the total file, BUFSIZE)
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* Max_o is the offset of maxb so it can be sought after the other bins
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* are sorted.
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*/
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struct tempfile {
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FILE *fp;
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u_char maxb;
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u_char lastb;
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int max_o;
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};
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extern struct tempfile fstack[MAXFCT];
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