598 lines
15 KiB
C
598 lines
15 KiB
C
/*-
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* Copyright (c) 1991, 1993, 1994
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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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* Steve Hayman of the Computer Science Department, Indiana University,
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* Michiro Hikida and David Goodenough.
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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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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1991, 1993, 1994\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)join.c 8.6 (Berkeley) 5/4/95";
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#endif
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static const char rcsid[] =
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"$FreeBSD$";
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#endif /* not lint */
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#include <sys/param.h>
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#include <ctype.h>
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#include <err.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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/*
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* There's a structure per input file which encapsulates the state of the
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* file. We repeatedly read lines from each file until we've read in all
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* the consecutive lines from the file with a common join field. Then we
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* compare the set of lines with an equivalent set from the other file.
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*/
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typedef struct {
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char *line; /* line */
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u_long linealloc; /* line allocated count */
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char **fields; /* line field(s) */
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u_long fieldcnt; /* line field(s) count */
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u_long fieldalloc; /* line field(s) allocated count */
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} LINE;
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typedef struct {
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FILE *fp; /* file descriptor */
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u_long joinf; /* join field (-1, -2, -j) */
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int unpair; /* output unpairable lines (-a) */
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int number; /* 1 for file 1, 2 for file 2 */
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LINE *set; /* set of lines with same field */
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int pushbool; /* if pushback is set */
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u_long pushback; /* line on the stack */
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u_long setcnt; /* set count */
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u_long setalloc; /* set allocated count */
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} INPUT;
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INPUT input1 = { NULL, 0, 0, 1, NULL, 0, 0, 0, },
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input2 = { NULL, 0, 0, 2, NULL, 0, 0, 0, };
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typedef struct {
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u_long filenum; /* file number */
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u_long fieldno; /* field number */
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} OLIST;
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OLIST *olist; /* output field list */
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u_long olistcnt; /* output field list count */
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u_long olistalloc; /* output field allocated count */
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int joinout = 1; /* show lines with matched join fields (-v) */
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int needsep; /* need separator character */
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int spans = 1; /* span multiple delimiters (-t) */
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char *empty; /* empty field replacement string (-e) */
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char *tabchar = " \t"; /* delimiter characters (-t) */
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int cmp __P((LINE *, u_long, LINE *, u_long));
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void fieldarg __P((char *));
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void joinlines __P((INPUT *, INPUT *));
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void obsolete __P((char **));
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void outfield __P((LINE *, u_long, int));
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void outoneline __P((INPUT *, LINE *));
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void outtwoline __P((INPUT *, LINE *, INPUT *, LINE *));
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void slurp __P((INPUT *));
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void usage __P((void));
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int
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main(argc, argv)
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int argc;
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char *argv[];
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{
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INPUT *F1, *F2;
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int aflag, ch, cval, vflag;
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char *end;
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F1 = &input1;
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F2 = &input2;
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aflag = vflag = 0;
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obsolete(argv);
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while ((ch = getopt(argc, argv, "\01a:e:j:1:2:o:t:v:")) != -1) {
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switch (ch) {
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case '\01': /* See comment in obsolete(). */
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aflag = 1;
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F1->unpair = F2->unpair = 1;
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break;
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case '1':
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if ((F1->joinf = strtol(optarg, &end, 10)) < 1)
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errx(1, "-1 option field number less than 1");
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if (*end)
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errx(1, "illegal field number -- %s", optarg);
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--F1->joinf;
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break;
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case '2':
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if ((F2->joinf = strtol(optarg, &end, 10)) < 1)
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errx(1, "-2 option field number less than 1");
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if (*end)
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errx(1, "illegal field number -- %s", optarg);
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--F2->joinf;
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break;
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case 'a':
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aflag = 1;
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switch(strtol(optarg, &end, 10)) {
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case 1:
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F1->unpair = 1;
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break;
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case 2:
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F2->unpair = 1;
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break;
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default:
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errx(1, "-a option file number not 1 or 2");
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break;
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}
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if (*end)
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errx(1, "illegal file number -- %s", optarg);
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break;
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case 'e':
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empty = optarg;
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break;
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case 'j':
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if ((F1->joinf = F2->joinf =
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strtol(optarg, &end, 10)) < 1)
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errx(1, "-j option field number less than 1");
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if (*end)
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errx(1, "illegal field number -- %s", optarg);
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--F1->joinf;
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--F2->joinf;
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break;
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case 'o':
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fieldarg(optarg);
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break;
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case 't':
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spans = 0;
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if (strlen(tabchar = optarg) != 1)
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errx(1, "illegal tab character specification");
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break;
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case 'v':
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vflag = 1;
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joinout = 0;
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switch (strtol(optarg, &end, 10)) {
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case 1:
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F1->unpair = 1;
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break;
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case 2:
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F2->unpair = 1;
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break;
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default:
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errx(1, "-v option file number not 1 or 2");
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break;
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}
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if (*end)
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errx(1, "illegal file number -- %s", optarg);
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break;
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case '?':
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default:
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usage();
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}
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}
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argc -= optind;
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argv += optind;
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if (aflag && vflag)
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errx(1, "the -a and -v options are mutually exclusive");
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if (argc != 2)
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usage();
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/* Open the files; "-" means stdin. */
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if (!strcmp(*argv, "-"))
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F1->fp = stdin;
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else if ((F1->fp = fopen(*argv, "r")) == NULL)
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err(1, "%s", *argv);
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++argv;
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if (!strcmp(*argv, "-"))
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F2->fp = stdin;
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else if ((F2->fp = fopen(*argv, "r")) == NULL)
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err(1, "%s", *argv);
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if (F1->fp == stdin && F2->fp == stdin)
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errx(1, "only one input file may be stdin");
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slurp(F1);
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slurp(F2);
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while (F1->setcnt && F2->setcnt) {
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cval = cmp(F1->set, F1->joinf, F2->set, F2->joinf);
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if (cval == 0) {
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/* Oh joy, oh rapture, oh beauty divine! */
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if (joinout)
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joinlines(F1, F2);
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slurp(F1);
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slurp(F2);
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} else if (cval < 0) {
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/* File 1 takes the lead... */
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if (F1->unpair)
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joinlines(F1, NULL);
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slurp(F1);
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} else {
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/* File 2 takes the lead... */
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if (F2->unpair)
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joinlines(F2, NULL);
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slurp(F2);
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}
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}
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/*
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* Now that one of the files is used up, optionally output any
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* remaining lines from the other file.
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*/
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if (F1->unpair)
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while (F1->setcnt) {
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joinlines(F1, NULL);
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slurp(F1);
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}
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if (F2->unpair)
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while (F2->setcnt) {
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joinlines(F2, NULL);
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slurp(F2);
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}
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exit(0);
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}
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void
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slurp(F)
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INPUT *F;
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{
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LINE *lp, *lastlp, tmp;
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size_t len;
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int cnt;
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char *bp, *fieldp;
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/*
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* Read all of the lines from an input file that have the same
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* join field.
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*/
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F->setcnt = 0;
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for (lastlp = NULL;; ++F->setcnt) {
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/*
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* If we're out of space to hold line structures, allocate
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* more. Initialize the structure so that we know that this
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* is new space.
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*/
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if (F->setcnt == F->setalloc) {
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cnt = F->setalloc;
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F->setalloc += 50;
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if ((F->set = realloc(F->set,
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F->setalloc * sizeof(LINE))) == NULL)
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err(1, NULL);
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memset(F->set + cnt, 0, 50 * sizeof(LINE));
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/* re-set lastlp in case it moved */
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if (lastlp != NULL)
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lastlp = &F->set[F->setcnt - 1];
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}
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/*
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* Get any pushed back line, else get the next line. Allocate
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* space as necessary. If taking the line from the stack swap
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* the two structures so that we don't lose space allocated to
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* either structure. This could be avoided by doing another
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* level of indirection, but it's probably okay as is.
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*/
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lp = &F->set[F->setcnt];
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if (F->setcnt)
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lastlp = &F->set[F->setcnt - 1];
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if (F->pushbool) {
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tmp = F->set[F->setcnt];
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F->set[F->setcnt] = F->set[F->pushback];
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F->set[F->pushback] = tmp;
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F->pushbool = 0;
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continue;
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}
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if ((bp = fgetln(F->fp, &len)) == NULL)
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return;
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if (lp->linealloc <= len + 1) {
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lp->linealloc += MAX(100, len + 1 - lp->linealloc);
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if ((lp->line =
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realloc(lp->line, lp->linealloc)) == NULL)
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err(1, NULL);
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}
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memmove(lp->line, bp, len);
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/* Replace trailing newline, if it exists. */
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if (bp[len - 1] == '\n')
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lp->line[len - 1] = '\0';
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else
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lp->line[len] = '\0';
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bp = lp->line;
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/* Split the line into fields, allocate space as necessary. */
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lp->fieldcnt = 0;
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while ((fieldp = strsep(&bp, tabchar)) != NULL) {
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if (spans && *fieldp == '\0')
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continue;
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if (lp->fieldcnt == lp->fieldalloc) {
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lp->fieldalloc += 50;
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if ((lp->fields = realloc(lp->fields,
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lp->fieldalloc * sizeof(char *))) == NULL)
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err(1, NULL);
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}
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lp->fields[lp->fieldcnt++] = fieldp;
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}
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/* See if the join field value has changed. */
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if (lastlp != NULL && cmp(lp, F->joinf, lastlp, F->joinf)) {
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F->pushbool = 1;
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F->pushback = F->setcnt;
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break;
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}
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}
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}
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int
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cmp(lp1, fieldno1, lp2, fieldno2)
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LINE *lp1, *lp2;
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u_long fieldno1, fieldno2;
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{
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if (lp1->fieldcnt <= fieldno1)
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return (lp2->fieldcnt <= fieldno2 ? 0 : 1);
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if (lp2->fieldcnt <= fieldno2)
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return (-1);
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return (strcmp(lp1->fields[fieldno1], lp2->fields[fieldno2]));
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}
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void
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joinlines(F1, F2)
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INPUT *F1, *F2;
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{
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int cnt1, cnt2;
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/*
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* Output the results of a join comparison. The output may be from
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* either file 1 or file 2 (in which case the first argument is the
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* file from which to output) or from both.
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*/
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if (F2 == NULL) {
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for (cnt1 = 0; cnt1 < F1->setcnt; ++cnt1)
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outoneline(F1, &F1->set[cnt1]);
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return;
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}
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for (cnt1 = 0; cnt1 < F1->setcnt; ++cnt1)
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for (cnt2 = 0; cnt2 < F2->setcnt; ++cnt2)
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outtwoline(F1, &F1->set[cnt1], F2, &F2->set[cnt2]);
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}
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void
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outoneline(F, lp)
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INPUT *F;
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LINE *lp;
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{
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int cnt;
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/*
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* Output a single line from one of the files, according to the
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* join rules. This happens when we are writing unmatched single
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* lines. Output empty fields in the right places.
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*/
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if (olist)
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for (cnt = 0; cnt < olistcnt; ++cnt) {
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if (olist[cnt].filenum == F->number)
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outfield(lp, olist[cnt].fieldno, 0);
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else
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outfield(lp, 0, 1);
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}
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else
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for (cnt = 0; cnt < lp->fieldcnt; ++cnt)
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outfield(lp, cnt, 0);
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(void)printf("\n");
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if (ferror(stdout))
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err(1, "stdout");
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needsep = 0;
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}
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void
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outtwoline(F1, lp1, F2, lp2)
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INPUT *F1, *F2;
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LINE *lp1, *lp2;
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{
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int cnt;
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/* Output a pair of lines according to the join list (if any). */
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if (olist)
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for (cnt = 0; cnt < olistcnt; ++cnt)
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if (olist[cnt].filenum == 1)
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outfield(lp1, olist[cnt].fieldno, 0);
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else /* if (olist[cnt].filenum == 2) */
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outfield(lp2, olist[cnt].fieldno, 0);
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else {
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/*
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* Output the join field, then the remaining fields from F1
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* and F2.
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*/
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outfield(lp1, F1->joinf, 0);
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for (cnt = 0; cnt < lp1->fieldcnt; ++cnt)
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if (F1->joinf != cnt)
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outfield(lp1, cnt, 0);
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for (cnt = 0; cnt < lp2->fieldcnt; ++cnt)
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if (F2->joinf != cnt)
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outfield(lp2, cnt, 0);
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}
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(void)printf("\n");
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if (ferror(stdout))
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err(1, "stdout");
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needsep = 0;
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}
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void
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outfield(lp, fieldno, out_empty)
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LINE *lp;
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u_long fieldno;
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int out_empty;
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{
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if (needsep++)
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(void)printf("%c", *tabchar);
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if (!ferror(stdout)) {
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if (lp->fieldcnt <= fieldno || out_empty) {
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if (empty != NULL)
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(void)printf("%s", empty);
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} else {
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if (*lp->fields[fieldno] == '\0')
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return;
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(void)printf("%s", lp->fields[fieldno]);
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}
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}
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if (ferror(stdout))
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err(1, "stdout");
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}
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/*
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* Convert an output list argument "2.1, 1.3, 2.4" into an array of output
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* fields.
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*/
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void
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fieldarg(option)
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char *option;
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{
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u_long fieldno;
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char *end, *token;
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while ((token = strsep(&option, ", \t")) != NULL) {
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if (*token == '\0')
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continue;
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if (token[0] != '1' && token[0] != '2' || token[1] != '.')
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errx(1, "malformed -o option field");
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fieldno = strtol(token + 2, &end, 10);
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if (*end)
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errx(1, "malformed -o option field");
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if (fieldno == 0)
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errx(1, "field numbers are 1 based");
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if (olistcnt == olistalloc) {
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olistalloc += 50;
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if ((olist = realloc(olist,
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olistalloc * sizeof(OLIST))) == NULL)
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err(1, NULL);
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}
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olist[olistcnt].filenum = token[0] - '0';
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olist[olistcnt].fieldno = fieldno - 1;
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++olistcnt;
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}
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}
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void
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obsolete(argv)
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char **argv;
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{
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int len;
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char **p, *ap, *t;
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while ((ap = *++argv) != NULL) {
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/* Return if "--". */
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if (ap[0] == '-' && ap[1] == '-')
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return;
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/* skip if not an option */
|
|
if (ap[0] != '-')
|
|
continue;
|
|
switch (ap[1]) {
|
|
case 'a':
|
|
/*
|
|
* The original join allowed "-a", which meant the
|
|
* same as -a1 plus -a2. POSIX 1003.2, Draft 11.2
|
|
* only specifies this as "-a 1" and "a -2", so we
|
|
* have to use another option flag, one that is
|
|
* unlikely to ever be used or accidentally entered
|
|
* on the command line. (Well, we could reallocate
|
|
* the argv array, but that hardly seems worthwhile.)
|
|
*/
|
|
if (ap[2] == '\0')
|
|
ap[1] = '\01';
|
|
break;
|
|
case 'j':
|
|
/*
|
|
* The original join allowed "-j[12] arg" and "-j arg".
|
|
* Convert the former to "-[12] arg". Don't convert
|
|
* the latter since getopt(3) can handle it.
|
|
*/
|
|
switch(ap[2]) {
|
|
case '1':
|
|
if (ap[3] != '\0')
|
|
goto jbad;
|
|
ap[1] = '1';
|
|
ap[2] = '\0';
|
|
break;
|
|
case '2':
|
|
if (ap[3] != '\0')
|
|
goto jbad;
|
|
ap[1] = '2';
|
|
ap[2] = '\0';
|
|
break;
|
|
case '\0':
|
|
break;
|
|
default:
|
|
jbad: errx(1, "illegal option -- %s", ap);
|
|
usage();
|
|
}
|
|
break;
|
|
case 'o':
|
|
/*
|
|
* The original join allowed "-o arg arg".
|
|
* Convert to "-o arg -o arg".
|
|
*/
|
|
if (ap[2] != '\0')
|
|
break;
|
|
for (p = argv + 2; *p; ++p) {
|
|
if (p[0][0] != '1' &&
|
|
p[0][0] != '2' || p[0][1] != '.')
|
|
break;
|
|
len = strlen(*p);
|
|
if (len - 2 != strspn(*p + 2, "0123456789"))
|
|
break;
|
|
if ((t = malloc(len + 3)) == NULL)
|
|
err(1, NULL);
|
|
t[0] = '-';
|
|
t[1] = 'o';
|
|
memmove(t + 2, *p, len + 1);
|
|
*p = t;
|
|
}
|
|
argv = p - 1;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
usage()
|
|
{
|
|
(void)fprintf(stderr, "%s %s\n%s\n",
|
|
"usage: join [-a fileno | -v fileno ] [-e string] [-1 field]",
|
|
"[-2 field]",
|
|
" [-o list] [-t char] file1 file2");
|
|
exit(1);
|
|
}
|