1/*-
2 * Copyright (c) 1990, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Kevin Ruddy.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 */
36
37#ifndef lint
38static const char copyright[] =
39"@(#) Copyright (c) 1990, 1993\n\
40 The Regents of the University of California. All rights reserved.\n";
41#endif /* not lint */
42
43#ifndef lint
44#if 0
45static char sccsid[] = "@(#)fold.c 8.1 (Berkeley) 6/6/93";
46#endif
47#endif /* not lint */
48
49#include <sys/cdefs.h>
| 1/*-
2 * Copyright (c) 1990, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Kevin Ruddy.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 */
36
37#ifndef lint
38static const char copyright[] =
39"@(#) Copyright (c) 1990, 1993\n\
40 The Regents of the University of California. All rights reserved.\n";
41#endif /* not lint */
42
43#ifndef lint
44#if 0
45static char sccsid[] = "@(#)fold.c 8.1 (Berkeley) 6/6/93";
46#endif
47#endif /* not lint */
48
49#include <sys/cdefs.h>
|
61
62int
63main(argc, argv)
64 int argc;
65 char **argv;
66{
67 register int ch;
68 int width;
69 char *p;
70
71 width = -1;
72 while ((ch = getopt(argc, argv, "0123456789w:")) != -1)
73 switch (ch) {
74 case 'w':
75 if ((width = atoi(optarg)) <= 0) {
76 errx(1, "illegal width value");
77 }
78 break;
79 case '0': case '1': case '2': case '3': case '4':
80 case '5': case '6': case '7': case '8': case '9':
81 if (width == -1) {
82 p = argv[optind - 1];
83 if (p[0] == '-' && p[1] == ch && !p[2])
84 width = atoi(++p);
85 else
86 width = atoi(argv[optind] + 1);
87 }
88 break;
89 default:
90 usage();
91 }
92 argv += optind;
93 argc -= optind;
94
95 if (width == -1)
96 width = DEFLINEWIDTH;
97 if (!*argv)
98 fold(width);
99 else for (; *argv; ++argv)
100 if (!freopen(*argv, "r", stdin)) {
101 err(1, "%s", *argv);
102 } else
103 fold(width);
104 exit(0);
105}
106
107static void
108usage()
109{
110 (void)fprintf(stderr, "usage: fold [-w width] [file ...]\n");
111 exit(1);
112}
113
114void
115fold(width)
116 register int width;
117{
118 register int ch, col, new;
119
120 for (col = 0;;) {
121 switch (ch = getchar()) {
122 case EOF:
123 return;
124 case '\b':
125 new = col ? col - 1 : 0;
126 break;
127 case '\n':
128 case '\r':
129 new = 0;
130 break;
131 case '\t':
132 new = (col + 8) & ~7;
133 break;
134 default:
135 new = col + 1;
136 break;
137 }
138
139 if (new > width) {
140 putchar('\n');
141 col = 0;
142 }
143 putchar(ch);
144
145 switch (ch) {
146 case '\b':
147 if (col > 0)
148 --col;
149 break;
150 case '\n':
151 case '\r':
152 col = 0;
153 break;
154 case '\t':
155 col += 8;
156 col &= ~7;
157 break;
158 default:
159 ++col;
160 break;
161 }
162 }
163}
| 61
62int
63main(argc, argv)
64 int argc;
65 char **argv;
66{
67 register int ch;
68 int width;
69 char *p;
70
71 width = -1;
72 while ((ch = getopt(argc, argv, "0123456789w:")) != -1)
73 switch (ch) {
74 case 'w':
75 if ((width = atoi(optarg)) <= 0) {
76 errx(1, "illegal width value");
77 }
78 break;
79 case '0': case '1': case '2': case '3': case '4':
80 case '5': case '6': case '7': case '8': case '9':
81 if (width == -1) {
82 p = argv[optind - 1];
83 if (p[0] == '-' && p[1] == ch && !p[2])
84 width = atoi(++p);
85 else
86 width = atoi(argv[optind] + 1);
87 }
88 break;
89 default:
90 usage();
91 }
92 argv += optind;
93 argc -= optind;
94
95 if (width == -1)
96 width = DEFLINEWIDTH;
97 if (!*argv)
98 fold(width);
99 else for (; *argv; ++argv)
100 if (!freopen(*argv, "r", stdin)) {
101 err(1, "%s", *argv);
102 } else
103 fold(width);
104 exit(0);
105}
106
107static void
108usage()
109{
110 (void)fprintf(stderr, "usage: fold [-w width] [file ...]\n");
111 exit(1);
112}
113
114void
115fold(width)
116 register int width;
117{
118 register int ch, col, new;
119
120 for (col = 0;;) {
121 switch (ch = getchar()) {
122 case EOF:
123 return;
124 case '\b':
125 new = col ? col - 1 : 0;
126 break;
127 case '\n':
128 case '\r':
129 new = 0;
130 break;
131 case '\t':
132 new = (col + 8) & ~7;
133 break;
134 default:
135 new = col + 1;
136 break;
137 }
138
139 if (new > width) {
140 putchar('\n');
141 col = 0;
142 }
143 putchar(ch);
144
145 switch (ch) {
146 case '\b':
147 if (col > 0)
148 --col;
149 break;
150 case '\n':
151 case '\r':
152 col = 0;
153 break;
154 case '\t':
155 col += 8;
156 col &= ~7;
157 break;
158 default:
159 ++col;
160 break;
161 }
162 }
163}
|