1 /* $NetBSD: column.c,v 1.22 2020/08/27 01:52:04 simonb Exp $ */
2
3 /*
4 * Copyright (c) 1989, 1993, 1994
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 #include <sys/cdefs.h>
33 #ifndef lint
34 __COPYRIGHT("@(#) Copyright (c) 1989, 1993, 1994\
35 The Regents of the University of California. All rights reserved.");
36 #endif /* not lint */
37
38 #ifndef lint
39 #if 0
40 static char sccsid[] = "@(#)column.c 8.4 (Berkeley) 5/4/95";
41 #endif
42 __RCSID("$NetBSD: column.c,v 1.22 2020/08/27 01:52:04 simonb Exp $");
43 #endif /* not lint */
44
45 #include <sys/types.h>
46 #include <sys/ioctl.h>
47
48 #include <ctype.h>
49 #include <err.h>
50 #include <termios.h>
51 #include <limits.h>
52 #include <stdio.h>
53 #include <stdlib.h>
54 #include <string.h>
55 #include <unistd.h>
56 #include <util.h>
57
58 #define TAB 8
59 #define TABROUND(l) (((l) + TAB) & ~(TAB - 1))
60
61 static void c_columnate(void);
62 static void input(FILE *);
63 static void maketbl(void);
64 static void print(void);
65 static void r_columnate(void);
66 static void usage(void) __dead;
67
68 static int termwidth = 80; /* default terminal width */
69
70 static int entries; /* number of records */
71 static int eval; /* exit value */
72 static int maxlength; /* longest record */
73 static char **list; /* array of pointers to records */
74 static const char *separator = "\t "; /* field separator for table option */
75
76 int
main(int argc,char ** argv)77 main(int argc, char **argv)
78 {
79 struct winsize win;
80 FILE *fp;
81 int ch, tflag, xflag;
82 const char *p;
83
84 setprogname(*argv);
85
86 if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &win) == -1 || !win.ws_col) {
87 if ((p = getenv("COLUMNS")) != NULL)
88 termwidth = atoi(p);
89 } else
90 termwidth = win.ws_col;
91
92 tflag = xflag = 0;
93 while ((ch = getopt(argc, argv, "c:s:tx")) != -1)
94 switch(ch) {
95 case 'c':
96 termwidth = atoi(optarg);
97 break;
98 case 's':
99 separator = optarg;
100 break;
101 case 't':
102 tflag = 1;
103 break;
104 case 'x':
105 xflag = 1;
106 break;
107 case '?':
108 default:
109 usage();
110 }
111 argc -= optind;
112 argv += optind;
113
114 if (!*argv)
115 input(stdin);
116 else for (; *argv; ++argv)
117 if ((fp = fopen(*argv, "r")) != NULL) {
118 input(fp);
119 (void)fclose(fp);
120 } else {
121 warn("Cannot open `%s'", *argv);
122 eval = 1;
123 }
124
125 if (!entries)
126 return eval;
127
128 maxlength = TABROUND(maxlength);
129 if (tflag)
130 maketbl();
131 else if (maxlength >= termwidth)
132 print();
133 else if (xflag)
134 c_columnate();
135 else
136 r_columnate();
137 return eval;
138 }
139
140 static void
c_columnate(void)141 c_columnate(void)
142 {
143 int chcnt, col, cnt, endcol, numcols;
144 char **lp;
145
146 numcols = termwidth / maxlength;
147 endcol = maxlength;
148 for (chcnt = col = 0, lp = list;; ++lp) {
149 chcnt += printf("%s", *lp);
150 if (!--entries)
151 break;
152 if (++col == numcols) {
153 chcnt = col = 0;
154 endcol = maxlength;
155 (void)putchar('\n');
156 } else {
157 while ((cnt = TABROUND(chcnt)) <= endcol) {
158 (void)putchar('\t');
159 chcnt = cnt;
160 }
161 endcol += maxlength;
162 }
163 }
164 if (chcnt)
165 (void)putchar('\n');
166 }
167
168 static void
r_columnate(void)169 r_columnate(void)
170 {
171 int base, chcnt, cnt, col, endcol, numcols, numrows, row;
172
173 numcols = termwidth / maxlength;
174 numrows = entries / numcols;
175 if (entries % numcols)
176 ++numrows;
177
178 for (row = 0; row < numrows; ++row) {
179 endcol = maxlength;
180 for (base = row, chcnt = col = 0; col < numcols; ++col) {
181 chcnt += printf("%s", list[base]);
182 if ((base += numrows) >= entries)
183 break;
184 while ((cnt = TABROUND(chcnt)) <= endcol) {
185 (void)putchar('\t');
186 chcnt = cnt;
187 }
188 endcol += maxlength;
189 }
190 (void)putchar('\n');
191 }
192 }
193
194 static void
print(void)195 print(void)
196 {
197 int cnt;
198 char **lp;
199
200 for (cnt = entries, lp = list; cnt--; ++lp)
201 (void)printf("%s\n", *lp);
202 }
203
204 typedef struct _tbl {
205 char **list;
206 int cols, *len;
207 } TBL;
208 #define DEFCOLS 25
209
210 static void
maketbl(void)211 maketbl(void)
212 {
213 TBL *t;
214 int coloff, cnt;
215 char *p, **lp;
216 int *lens, *nlens, maxcols;
217 TBL *tbl;
218 char **cols, **ncols;
219
220 t = tbl = ecalloc(entries, sizeof(*t));
221 cols = ecalloc((maxcols = DEFCOLS), sizeof(*cols));
222 lens = ecalloc(maxcols, sizeof(*lens));
223 for (cnt = 0, lp = list; cnt < entries; ++cnt, ++lp, ++t) {
224 for (coloff = 0, p = *lp;
225 (cols[coloff] = strtok(p, separator)) != NULL; p = NULL)
226 if (++coloff == maxcols) {
227 ncols = erealloc(cols, (maxcols +
228 DEFCOLS) * sizeof(*ncols));
229 nlens = erealloc(lens, (maxcols +
230 DEFCOLS) * sizeof(*nlens));
231 cols = ncols;
232 lens = nlens;
233 (void)memset(cols + maxcols, 0,
234 DEFCOLS * sizeof(*cols));
235 (void)memset(lens + maxcols, 0,
236 DEFCOLS * sizeof(*lens));
237 maxcols += DEFCOLS;
238 }
239 t->list = ecalloc(coloff, sizeof(*(t->list)));
240 t->len = ecalloc(coloff, sizeof(*(t->len)));
241 for (t->cols = coloff; --coloff >= 0;) {
242 t->list[coloff] = cols[coloff];
243 t->len[coloff] = strlen(cols[coloff]);
244 if (t->len[coloff] > lens[coloff])
245 lens[coloff] = t->len[coloff];
246 }
247 }
248 for (cnt = 0, t = tbl; cnt < entries; ++cnt, ++t) {
249 for (coloff = 0; coloff < t->cols - 1; ++coloff)
250 (void)printf("%s%*s", t->list[coloff],
251 lens[coloff] - t->len[coloff] + 2, " ");
252 (void)printf("%s\n", t->list[coloff]);
253 }
254 free(tbl);
255 free(cols);
256 free(lens);
257 }
258
259 #define DEFNUM 1000
260
261 static void
input(FILE * fp)262 input(FILE *fp)
263 {
264 static int maxentry;
265 int len;
266 size_t blen;
267 char *p, *buf;
268 char **n;
269
270 if (!list)
271 list = ecalloc((maxentry = DEFNUM), sizeof(*list));
272 while ((buf = fgetln(fp, &blen)) != NULL) {
273 buf = estrndup(buf, blen);
274 for (p = buf; *p && isspace((unsigned char)*p); ++p);
275 if (!*p) {
276 free(buf);
277 continue;
278 }
279 if (!(p = strchr(p, '\n'))) {
280 warnx("line too long");
281 eval = 1;
282 free(buf);
283 continue;
284 }
285 *p = '\0';
286 len = p - buf;
287 if (maxlength < len)
288 maxlength = len;
289 if (entries == maxentry) {
290 n = erealloc(list, (maxentry + DEFNUM) * sizeof(*n));
291 (void)memset(n + maxentry, 0, sizeof(*n) * DEFNUM);
292 maxentry += DEFNUM;
293 list = n;
294 }
295 list[entries++] = buf;
296 }
297 }
298
299 static void
usage(void)300 usage(void)
301 {
302
303 (void)fprintf(stderr,
304 "Usage: %s [-tx] [-c columns] [-s sep] [file ...]\n",
305 getprogname());
306 exit(1);
307 }
308