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Annotation of src/usr.bin/sort/fsort.h, Revision 1.7

1.6       naddy       1: /*     $OpenBSD: fsort.h,v 1.5 2006/10/18 23:30:43 millert Exp $       */
1.1       millert     2:
                      3: /*-
                      4:  * Copyright (c) 1993
                      5:  *     The Regents of the University of California.  All rights reserved.
                      6:  *
                      7:  * This code is derived from software contributed to Berkeley by
                      8:  * Peter McIlroy.
                      9:  *
                     10:  * Redistribution and use in source and binary forms, with or without
                     11:  * modification, are permitted provided that the following conditions
                     12:  * are met:
                     13:  * 1. Redistributions of source code must retain the above copyright
                     14:  *    notice, this list of conditions and the following disclaimer.
                     15:  * 2. Redistributions in binary form must reproduce the above copyright
                     16:  *    notice, this list of conditions and the following disclaimer in the
                     17:  *    documentation and/or other materials provided with the distribution.
1.4       millert    18:  * 3. Neither the name of the University nor the names of its contributors
1.1       millert    19:  *    may be used to endorse or promote products derived from this software
                     20:  *    without specific prior written permission.
                     21:  *
                     22:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     23:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     24:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     25:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     26:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     27:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     28:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     29:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     30:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     31:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     32:  * SUCH DAMAGE.
                     33:  *
                     34:  *     @(#)fsort.h     8.1 (Berkeley) 6/6/93
                     35:  */
                     36:
                     37: #define POW 20                 /* exponent for buffer size */
                     38: #define BUFSIZE (1 << POW)
                     39: #define MAXNUM (BUFSIZE/10)    /* lowish guess at average record size */
                     40: #define BUFFEND (EOF-2)
1.3       ericj      41: #define BUFFSMALL (EOF-3)      /* buffer is too small to hold line */
1.1       millert    42: #define MAXFCT 1000
                     43: #define MAXLLEN ((1 << min(POW-4, 16)) - 14)
                     44:
1.7     ! millert    45: extern u_char *buffer, *bufend, *linebuf;
1.3       ericj      46: extern size_t bufsize, linebuf_size;
1.1       millert    47:
                     48: /* temp files in the stack have a file descriptor, a largest bin (maxb)
                     49:  * which becomes the last non-empty bin (lastb) when the actual largest
                     50:  * bin is smaller than max(half the total file, BUFSIZE)
                     51:  * Max_o is the offset of maxb so it can be sought after the other bins
                     52:  * are sorted.
                     53: */
                     54: struct tempfile {
                     55:        FILE *fp;
                     56:        u_char maxb;
                     57:        u_char lastb;
1.2       millert    58:        int max_o;
1.1       millert    59: };
                     60: extern struct tempfile fstack[MAXFCT];