78 lines
3.0 KiB
C
78 lines
3.0 KiB
C
/* $NetBSD: fsort.h,v 1.8 2001/02/19 20:50:17 jdolecek Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* Peter McIlroy.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* @(#)fsort.h 8.1 (Berkeley) 6/6/93
|
|
*/
|
|
|
|
#define BUFSIZE (1<<20)
|
|
#define MAXNUM 131072 /* low guess at average record count */
|
|
#define BUFFEND (EOF-2)
|
|
#define MAXFCT 1000
|
|
#define DEFLLEN 65536
|
|
|
|
/*
|
|
* Default (initial) and maximum size of record buffer for fsort().
|
|
* Note that no more than MAXNUM records are stored in the buffer,
|
|
* even if the buffer is not full yet.
|
|
*/
|
|
#define DEFBUFSIZE (1 << 20) /* 1MB */
|
|
#define MAXBUFSIZE (8 << 20) /* 10 MB */
|
|
|
|
/*
|
|
* Number of files merge() can merge in one pass.
|
|
* This should be power of two so that it's possible to use this value
|
|
* for rouding.
|
|
*/
|
|
#define MERGE_FNUM 16
|
|
|
|
extern u_char *buffer, *linebuf;
|
|
extern size_t bufsize, linebuf_size;
|
|
|
|
/* temp files in the stack have a file descriptor, a largest bin (maxb)
|
|
* which becomes the last non-empty bin (lastb) when the actual largest
|
|
* bin is smaller than max(half the total file, BUFSIZE)
|
|
* Max_o is the offset of maxb so it can be sought after the other bins
|
|
* are sorted.
|
|
*/
|
|
struct tempfile {
|
|
FILE *fp;
|
|
u_char maxb;
|
|
u_char lastb;
|
|
int max_o;
|
|
};
|
|
extern struct tempfile fstack[MAXFCT];
|