usr.bin/column/column.c

   1 /*      $NetBSD: column.c,v 1.21 2008/07/21 14:19:21 lukem 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 1.21 2008/07/21 14:19:21 lukem 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
  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
 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
 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
 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
 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
 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
 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 }