2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1989, 1993, 1994
5 * The Regents of the University of California. All rights reserved.
7 * This code is derived from software contributed to Berkeley by
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
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. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
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
36 static const char copyright[] =
37 "@(#) Copyright (c) 1989, 1993, 1994\n\
38 The Regents of the University of California. All rights reserved.\n";
43 static char sccsid[] = "From: @(#)comm.c 8.4 (Berkeley) 5/4/95";
47 #include <sys/cdefs.h>
48 __FBSDID("$FreeBSD$");
62 static const char *tabs[] = { "", "\t", "\t\t" };
64 static FILE *file(const char *);
65 static wchar_t *convert(const char *);
66 static void show(FILE *, const char *, const char *, char **, size_t *);
67 static void usage(void);
70 main(int argc, char *argv[])
72 int comp, read1, read2;
73 int ch, flag1, flag2, flag3;
75 const char *col1, *col2, *col3;
76 size_t line1len, line2len;
79 wchar_t *tline1, *tline2;
82 (void) setlocale(LC_ALL, "");
84 flag1 = flag2 = flag3 = 1;
86 while ((ch = getopt(argc, argv, "123i")) != -1)
113 /* for each column printed, add another tab offset */
115 col1 = col2 = col3 = NULL;
123 line1len = line2len = 0;
124 line1 = line2 = NULL;
127 for (read1 = read2 = 1;;) {
128 /* read next line, check for EOF */
130 n1 = getline(&line1, &line1len, fp1);
131 if (n1 < 0 && ferror(fp1))
132 err(1, "%s", argv[0]);
133 if (n1 > 0 && line1[n1 - 1] == '\n')
134 line1[n1 - 1] = '\0';
138 n2 = getline(&line2, &line2len, fp2);
139 if (n2 < 0 && ferror(fp2))
140 err(1, "%s", argv[1]);
141 if (n2 > 0 && line2[n2 - 1] == '\n')
142 line2[n2 - 1] = '\0';
145 /* if one file done, display the rest of the other file */
147 if (n2 >= 0 && col2 != NULL)
148 show(fp2, argv[1], col2, &line2, &line2len);
152 if (n1 >= 0 && col1 != NULL)
153 show(fp1, argv[0], col1, &line1, &line1len);
158 if ((tline1 = convert(line1)) != NULL)
159 tline2 = convert(line2);
160 if (tline1 == NULL || tline2 == NULL)
161 comp = strcmp(line1, line2);
163 comp = wcscoll(tline1, tline2);
169 /* lines are the same */
173 (void)printf("%s%s\n", col3, line1);
177 /* lines are different */
182 (void)printf("%s%s\n", col1, line1);
187 (void)printf("%s%s\n", col2, line2);
194 convert(const char *str)
199 if ((n = mbstowcs(NULL, str, 0)) == (size_t)-1)
201 if (SIZE_MAX / sizeof(*buf) < n + 1)
202 errx(1, "conversion buffer length overflow");
203 if ((buf = malloc((n + 1) * sizeof(*buf))) == NULL)
205 if (mbstowcs(buf, str, n + 1) != n)
206 errx(1, "internal mbstowcs() error");
209 for (p = buf; *p != L'\0'; p++)
217 show(FILE *fp, const char *fn, const char *offset, char **bufp, size_t *buflenp)
222 (void)printf("%s%s\n", offset, *bufp);
223 if ((n = getline(bufp, buflenp, fp)) < 0)
225 if (n > 0 && (*bufp)[n - 1] == '\n')
226 (*bufp)[n - 1] = '\0';
233 file(const char *name)
237 if (!strcmp(name, "-"))
239 if ((fp = fopen(name, "r")) == NULL) {
248 (void)fprintf(stderr, "usage: comm [-123i] file1 file2\n");