usr.bin/column/column.c

   1 /*
   2  * Copyright (c) 1989, 1993, 1994
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  * $FreeBSD: src/usr.bin/column/column.c,v 1.4.6.2 2001/08/02 01:34:19 obrien Exp $
  34  * $DragonFly: src/usr.bin/column/column.c,v 1.6 2006/10/08 09:12:32 corecode Exp $
  35  *
  36  * @(#) Copyright (c) 1989, 1993, 1994 The Regents of the University of California.  All rights reserved.
  37  * @(#)column.c 8.4 (Berkeley) 5/4/95
  38  */
  39
  40 #include <sys/types.h>
  41 #include <sys/ioctl.h>
  42
  43 #include <ctype.h>
  44 #include <err.h>
  45 #include <limits.h>
  46 #include <stdio.h>
  47 #include <stdlib.h>
  48 #include <string.h>
  49 #include <unistd.h>
  50
  51 #define TAB     8
  52
  53 void  c_columnate(void);
  54 void  input(FILE *);
  55 void  maketbl(void);
  56 void  print(void);
  57 void  r_columnate(void);
  58 void  usage(void);
  59
  60 int termwidth = 80;             /* default terminal width */
  61
  62 int entries;                    /* number of records */
  63 int eval;                       /* exit value */
  64 int maxlength;                  /* longest record */
  65 char **list;                    /* array of pointers to records */
  66 const char *separator = "\t ";  /* field separator for table option */
  67
  68 int
  69 main(int argc, char **argv)
  70 {
  71         struct winsize win;
  72         FILE *fp;
  73         int ch, tflag, xflag;
  74         char *p;
  75
  76         if (ioctl(1, TIOCGWINSZ, &win) == -1 || !win.ws_col) {
  77                 if ((p = getenv("COLUMNS")))
  78                         termwidth = atoi(p);
  79         } else
  80                 termwidth = win.ws_col;
  81
  82         tflag = xflag = 0;
  83         while ((ch = getopt(argc, argv, "c:s:tx")) != -1)
  84                 switch(ch) {
  85                 case 'c':
  86                         termwidth = atoi(optarg);
  87                         break;
  88                 case 's':
  89                         separator = optarg;
  90                         break;
  91                 case 't':
  92                         tflag = 1;
  93                         break;
  94                 case 'x':
  95                         xflag = 1;
  96                         break;
  97                 case '?':
  98                 default:
  99                         usage();
 100                 }
 101         argc -= optind;
 102         argv += optind;
 103
 104         if (!*argv)
 105                 input(stdin);
 106         else for (; *argv; ++argv)
 107                 if ((fp = fopen(*argv, "r"))) {
 108                         input(fp);
 109                         (void)fclose(fp);
 110                 } else {
 111                         warn("%s", *argv);
 112                         eval = 1;
 113                 }
 114
 115         if (!entries)
 116                 exit(eval);
 117
 118         maxlength = (maxlength + TAB) & ~(TAB - 1);
 119         if (tflag)
 120                 maketbl();
 121         else if (maxlength >= termwidth)
 122                 print();
 123         else if (xflag)
 124                 c_columnate();
 125         else
 126                 r_columnate();
 127         exit(eval);
 128 }
 129
 130 void
 131 c_columnate(void)
 132 {
 133         int chcnt, col, cnt, endcol, numcols;
 134         char **lp;
 135
 136         numcols = termwidth / maxlength;
 137         endcol = maxlength;
 138         for (chcnt = col = 0, lp = list;; ++lp) {
 139                 chcnt += printf("%s", *lp);
 140                 if (!--entries)
 141                         break;
 142                 if (++col == numcols) {
 143                         chcnt = col = 0;
 144                         endcol = maxlength;
 145                         putchar('\n');
 146                 } else {
 147                         while ((cnt = ((chcnt + TAB) & ~(TAB - 1))) <= endcol) {
 148                                 (void)putchar('\t');
 149                                 chcnt = cnt;
 150                         }
 151                         endcol += maxlength;
 152                 }
 153         }
 154         if (chcnt)
 155                 putchar('\n');
 156 }
 157
 158 void
 159 r_columnate(void)
 160 {
 161         int base, chcnt, cnt, col, endcol, numcols, numrows, row;
 162
 163         numcols = termwidth / maxlength;
 164         numrows = entries / numcols;
 165         if (entries % numcols)
 166                 ++numrows;
 167
 168         for (row = 0; row < numrows; ++row) {
 169                 endcol = maxlength;
 170                 for (base = row, chcnt = col = 0; col < numcols; ++col) {
 171                         chcnt += printf("%s", list[base]);
 172                         if ((base += numrows) >= entries)
 173                                 break;
 174                         while ((cnt = ((chcnt + TAB) & ~(TAB - 1))) <= endcol) {
 175                                 (void)putchar('\t');
 176                                 chcnt = cnt;
 177                         }
 178                         endcol += maxlength;
 179                 }
 180                 putchar('\n');
 181         }
 182 }
 183
 184 void
 185 print(void)
 186 {
 187         int cnt;
 188         char **lp;
 189
 190         for (cnt = entries, lp = list; cnt--; ++lp)
 191                 (void)printf("%s\n", *lp);
 192 }
 193
 194 typedef struct _tbl {
 195         char **list;
 196         int cols, *len;
 197 } TBL;
 198 #define DEFCOLS 25
 199
 200 void
 201 maketbl(void)
 202 {
 203         TBL *t;
 204         int coloff, cnt;
 205         char *p, **lp;
 206         int *lens, maxcols;
 207         TBL *tbl;
 208         char **cols;
 209
 210         if ((t = tbl = calloc(entries, sizeof(TBL))) == NULL)
 211                 err(1, NULL);
 212         if ((cols = calloc((maxcols = DEFCOLS), sizeof(char *))) == NULL)
 213                 err(1, NULL);
 214         if ((lens = calloc(maxcols, sizeof(int))) == NULL)
 215                 err(1, NULL);
 216         for (cnt = 0, lp = list; cnt < entries; ++cnt, ++lp, ++t) {
 217                 for (coloff = 0, p = *lp; (cols[coloff] = strtok(p, separator));
 218                     p = NULL)
 219                         if (++coloff == maxcols) {
 220                                 if (!(cols = realloc(cols, ((u_int)maxcols +
 221                                     DEFCOLS) * sizeof(char *))) ||
 222                                     !(lens = realloc(lens,
 223                                     ((u_int)maxcols + DEFCOLS) * sizeof(int))))
 224                                         err(1, NULL);
 225                                 memset((char *)lens + maxcols * sizeof(int),
 226                                     0, DEFCOLS * sizeof(int));
 227                                 maxcols += DEFCOLS;
 228                         }
 229                 if ((t->list = calloc(coloff, sizeof(char *))) == NULL)
 230                         err(1, NULL);
 231                 if ((t->len = calloc(coloff, sizeof(int))) == NULL)
 232                         err(1, NULL);
 233                 for (t->cols = coloff; --coloff >= 0;) {
 234                         t->list[coloff] = cols[coloff];
 235                         t->len[coloff] = strlen(cols[coloff]);
 236                         if (t->len[coloff] > lens[coloff])
 237                                 lens[coloff] = t->len[coloff];
 238                 }
 239         }
 240         for (cnt = 0, t = tbl; cnt < entries; ++cnt, ++t) {
 241                 for (coloff = 0; coloff < t->cols  - 1; ++coloff)
 242                         (void)printf("%s%*s", t->list[coloff],
 243                             lens[coloff] - t->len[coloff] + 2, " ");
 244                 (void)printf("%s\n", t->list[coloff]);
 245         }
 246 }
 247
 248 #define DEFNUM          1000
 249 #define MAXLINELEN      (LINE_MAX + 1)
 250
 251 void
 252 input(FILE *fp)
 253 {
 254         static int maxentry;
 255         int len;
 256         char *p, buf[MAXLINELEN];
 257
 258         if (!list)
 259                 if ((list = calloc((maxentry = DEFNUM), sizeof(char *))) ==
 260                     NULL)
 261                         err(1, NULL);
 262         while (fgets(buf, MAXLINELEN, fp)) {
 263                 for (p = buf; *p && isspace(*p); ++p);
 264                 if (!*p)
 265                         continue;
 266                 if (!(p = strchr(p, '\n'))) {
 267                         warnx("line too long");
 268                         eval = 1;
 269                         continue;
 270                 }
 271                 *p = '\0';
 272                 len = p - buf;
 273                 if (maxlength < len)
 274                         maxlength = len;
 275                 if (entries == maxentry) {
 276                         maxentry += DEFNUM;
 277                         if (!(list = realloc(list,
 278                             (u_int)maxentry * sizeof(char *))))
 279                                 err(1, NULL);
 280                 }
 281                 list[entries++] = strdup(buf);
 282         }
 283 }
 284
 285 void
 286 usage(void)
 287 {
 288
 289         (void)fprintf(stderr,
 290             "usage: column [-tx] [-c columns] [-s sep] [file ...]\n");
 291         exit(1);
 292 }