mirror of
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292 lines
6.7 KiB
C
292 lines
6.7 KiB
C
/*
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* Copyright (c) 1989, 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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* Case Larsen.
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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) 1989, 1993\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[] = "@(#)uniq.c 8.3 (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 <ctype.h>
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#include <err.h>
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#include <limits.h>
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#include <locale.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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#define MAXLINELEN (LINE_MAX + 1)
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int cflag, dflag, uflag;
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int numchars, numfields, repeats;
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FILE *file(const char *, const char *);
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char *getline(char *, size_t, FILE *);
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void show(FILE *, char *);
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char *skip(char *);
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void obsolete(char *[]);
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static void usage(void);
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int stricoll(char *, char*);
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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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register char *t1, *t2;
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FILE *ifp, *ofp;
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int ch;
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char *prevline, *thisline, *p;
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int iflag = 0, comp;
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(void) setlocale(LC_ALL, "");
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obsolete(argv);
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while ((ch = getopt(argc, argv, "cdif:s:u")) != -1)
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switch (ch) {
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case 'c':
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cflag = 1;
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break;
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case 'd':
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dflag = 1;
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break;
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case 'i':
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iflag = 1;
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break;
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case 'f':
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numfields = strtol(optarg, &p, 10);
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if (numfields < 0 || *p)
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errx(1, "illegal field skip value: %s", optarg);
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break;
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case 's':
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numchars = strtol(optarg, &p, 10);
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if (numchars < 0 || *p)
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errx(1, "illegal character skip value: %s", optarg);
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break;
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case 'u':
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uflag = 1;
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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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argc -= optind;
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argv +=optind;
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/* If no flags are set, default is -d -u. */
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if (cflag) {
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if (dflag || uflag)
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usage();
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} else if (!dflag && !uflag)
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dflag = uflag = 1;
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if (argc > 2)
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usage();
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ifp = stdin;
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ofp = stdout;
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if (argc > 0 && strcmp(argv[0], "-") != 0)
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ifp = file(argv[0], "r");
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if (argc > 1)
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ofp = file(argv[1], "w");
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prevline = malloc(MAXLINELEN);
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thisline = malloc(MAXLINELEN);
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if (prevline == NULL || thisline == NULL)
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err(1, "malloc");
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if (getline(prevline, MAXLINELEN, ifp) == NULL)
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exit(0);
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if (!cflag && uflag && dflag)
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show(ofp, prevline);
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while (getline(thisline, MAXLINELEN, ifp)) {
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/* If requested get the chosen fields + character offsets. */
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if (numfields || numchars) {
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t1 = skip(thisline);
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t2 = skip(prevline);
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} else {
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t1 = thisline;
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t2 = prevline;
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}
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/* If different, print; set previous to new value. */
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if (iflag)
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comp = stricoll(t1, t2);
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else
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comp = strcoll(t1, t2);
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if (comp) {
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if (cflag || !dflag || !uflag)
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show(ofp, prevline);
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t1 = prevline;
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prevline = thisline;
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if (!cflag && uflag && dflag)
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show(ofp, prevline);
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thisline = t1;
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repeats = 0;
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} else
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++repeats;
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}
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if (cflag || !dflag || !uflag)
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show(ofp, prevline);
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exit(0);
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}
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char *
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getline(char *buf, size_t buflen, FILE *fp)
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{
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size_t bufpos;
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int ch;
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bufpos = 0;
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while (bufpos + 2 != buflen && (ch = getc(fp)) != EOF && ch != '\n')
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buf[bufpos++] = ch;
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if (bufpos + 1 != buflen)
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buf[bufpos] = '\0';
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while (ch != EOF && ch != '\n')
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ch = getc(fp);
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return (bufpos != 0 || ch == '\n' ? buf : NULL);
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}
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/*
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* show --
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* Output a line depending on the flags and number of repetitions
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* of the line.
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*/
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void
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show(ofp, str)
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FILE *ofp;
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char *str;
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{
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if (cflag && *str)
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(void)fprintf(ofp, "%4d %s\n", repeats + 1, str);
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if ((dflag && repeats) || (uflag && !repeats))
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(void)fprintf(ofp, "%s\n", str);
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}
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char *
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skip(str)
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register char *str;
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{
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register int nchars, nfields;
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for (nfields = 0; *str != '\0' && nfields++ != numfields; ) {
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while (isblank((unsigned char)*str))
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str++;
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while (*str != '\0' && !isblank((unsigned char)*str))
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str++;
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}
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for (nchars = numchars; nchars-- && *str; ++str);
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return(str);
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}
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FILE *
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file(name, mode)
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const char *name, *mode;
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{
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FILE *fp;
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if ((fp = fopen(name, mode)) == NULL)
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err(1, "%s", name);
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return(fp);
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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 *ap, *p, *start;
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while ((ap = *++argv)) {
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/* Return if "--" or not an option of any form. */
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if (ap[0] != '-') {
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if (ap[0] != '+')
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return;
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} else if (ap[1] == '-')
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return;
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if (!isdigit((unsigned char)ap[1]))
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continue;
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/*
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* Digit signifies an old-style option. Malloc space for dash,
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* new option and argument.
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*/
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len = strlen(ap);
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if ((start = p = malloc(len + 3)) == NULL)
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err(1, "malloc");
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*p++ = '-';
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*p++ = ap[0] == '+' ? 's' : 'f';
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(void)strcpy(p, ap + 1);
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*argv = start;
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}
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}
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static void
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usage()
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{
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(void)fprintf(stderr,
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"usage: uniq [-c | -d | -u] [-i] [-f fields] [-s chars] [input [output]]\n");
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exit(1);
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}
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int
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stricoll(s1, s2)
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char *s1, *s2;
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{
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char *p, line1[MAXLINELEN], line2[MAXLINELEN];
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for (p = line1; *s1; s1++)
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*p++ = tolower((unsigned char)*s1);
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*p = '\0';
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for (p = line2; *s2; s2++)
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*p++ = tolower((unsigned char)*s2);
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*p = '\0';
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return strcoll(line1, line2);
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}
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