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Annotation of src/usr.bin/sort/fsort.h, Revision 1.3

1.3     ! ericj       1: /*     $OpenBSD: fsort.h,v 1.2 1997/06/30 05:36:17 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.
                     18:  * 3. All advertising materials mentioning features or use of this software
                     19:  *    must display the following acknowledgement:
                     20:  *     This product includes software developed by the University of
                     21:  *     California, Berkeley and its contributors.
                     22:  * 4. Neither the name of the University nor the names of its contributors
                     23:  *    may be used to endorse or promote products derived from this software
                     24:  *    without specific prior written permission.
                     25:  *
                     26:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     27:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     28:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     29:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     30:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     31:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     32:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     33:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     34:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     35:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     36:  * SUCH DAMAGE.
                     37:  *
                     38:  *     @(#)fsort.h     8.1 (Berkeley) 6/6/93
                     39:  */
                     40:
                     41: #define POW 20                 /* exponent for buffer size */
                     42: #define BUFSIZE (1 << POW)
                     43: #define MAXNUM (BUFSIZE/10)    /* lowish guess at average record size */
                     44: #define BUFFEND (EOF-2)
1.3     ! ericj      45: #define BUFFSMALL (EOF-3)      /* buffer is too small to hold line */
1.1       millert    46: #define MAXFCT 1000
                     47: #define MAXLLEN ((1 << min(POW-4, 16)) - 14)
                     48:
1.3     ! ericj      49: extern u_char **keylist, *buffer, *linebuf;
        !            50: extern size_t bufsize, linebuf_size;
1.1       millert    51:
                     52: /* temp files in the stack have a file descriptor, a largest bin (maxb)
                     53:  * which becomes the last non-empty bin (lastb) when the actual largest
                     54:  * bin is smaller than max(half the total file, BUFSIZE)
                     55:  * Max_o is the offset of maxb so it can be sought after the other bins
                     56:  * are sorted.
                     57: */
                     58: struct tempfile {
                     59:        FILE *fp;
                     60:        u_char maxb;
                     61:        u_char lastb;
1.2       millert    62:        int max_o;
1.1       millert    63: };
                     64: extern struct tempfile fstack[MAXFCT];