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. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * $FreeBSD: head/usr.bin/column/column.c 292864 2015-12-29 11:24:41Z uqs $
  30  *
  31  * @(#) Copyright (c) 1989, 1993, 1994 The Regents of the University of California.  All rights reserved.
  32  * @(#)column.c 8.4 (Berkeley) 5/4/95
  33  */
  34
  35 #include <sys/types.h>
  36 #include <sys/ioctl.h>
  37 #include <sys/param.h>
  38
  39 #include <err.h>
  40 #include <limits.h>
  41 #include <locale.h>
  42 #include <stdio.h>
  43 #include <stdlib.h>
  44 #include <string.h>
  45 #include <unistd.h>
  46 #include <wchar.h>
  47 #include <wctype.h>
  48
  49 #define TAB     8
  50
  51 static void     c_columnate(void);
  52 static void     input(FILE *);
  53 static void     maketbl(void);
  54 static void     print(void);
  55 static void     r_columnate(void);
  56 static void     usage(void);
  57 static int      width(const wchar_t *);
  58
  59 static int      termwidth = 80;         /* default terminal width */
  60
  61 static int      entries;                /* number of records */
  62 static int      eval;                   /* exit value */
  63 static int      maxlength;              /* longest record */
  64 static wchar_t  **list;                 /* array of pointers to records */
  65 static const wchar_t *separator = L"\t "; /* field separator for table option */
  66
  67 int
  68 main(int argc, char **argv)
  69 {
  70         struct winsize win;
  71         FILE *fp;
  72         int ch, tflag, xflag;
  73         char *p;
  74         const char *src;
  75         wchar_t *newsep;
  76         size_t seplen;
  77
  78         setlocale(LC_ALL, "");
  79
  80         if (ioctl(1, TIOCGWINSZ, &win) == -1 || !win.ws_col) {
  81                 if ((p = getenv("COLUMNS")))
  82                         termwidth = atoi(p);
  83         } else
  84                 termwidth = win.ws_col;
  85
  86         tflag = xflag = 0;
  87         while ((ch = getopt(argc, argv, "c:s:tx")) != -1)
  88                 switch(ch) {
  89                 case 'c':
  90                         termwidth = atoi(optarg);
  91                         break;
  92                 case 's':
  93                         src = optarg;
  94                         seplen = mbsrtowcs(NULL, &src, 0, NULL);
  95                         if (seplen == (size_t)-1)
  96                                 err(1, "bad separator");
  97                         newsep = malloc((seplen + 1) * sizeof(wchar_t));
  98                         if (newsep == NULL)
  99                                 err(1, NULL);
 100                         mbsrtowcs(newsep, &src, seplen + 1, NULL);
 101                         separator = newsep;
 102                         break;
 103                 case 't':
 104                         tflag = 1;
 105                         break;
 106                 case 'x':
 107                         xflag = 1;
 108                         break;
 109                 case '?':
 110                 default:
 111                         usage();
 112                 }
 113         argc -= optind;
 114         argv += optind;
 115
 116         if (!*argv)
 117                 input(stdin);
 118         else for (; *argv; ++argv)
 119                 if ((fp = fopen(*argv, "r"))) {
 120                         input(fp);
 121                         (void)fclose(fp);
 122                 } else {
 123                         warn("%s", *argv);
 124                         eval = 1;
 125                 }
 126
 127         if (!entries)
 128                 exit(eval);
 129
 130         maxlength = roundup(maxlength + 1, TAB);
 131         if (tflag)
 132                 maketbl();
 133         else if (maxlength >= termwidth)
 134                 print();
 135         else if (xflag)
 136                 c_columnate();
 137         else
 138                 r_columnate();
 139         exit(eval);
 140 }
 141
 142 static void
 143 c_columnate(void)
 144 {
 145         int chcnt, col, cnt, endcol, numcols;
 146         wchar_t **lp;
 147
 148         numcols = termwidth / maxlength;
 149         endcol = maxlength;
 150         for (chcnt = col = 0, lp = list;; ++lp) {
 151                 wprintf(L"%ls", *lp);
 152                 chcnt += width(*lp);
 153                 if (!--entries)
 154                         break;
 155                 if (++col == numcols) {
 156                         chcnt = col = 0;
 157                         endcol = maxlength;
 158                         putwchar('\n');
 159                 } else {
 160                         while ((cnt = roundup(chcnt + 1, TAB)) <= endcol) {
 161                                 (void)putwchar('\t');
 162                                 chcnt = cnt;
 163                         }
 164                         endcol += maxlength;
 165                 }
 166         }
 167         if (chcnt)
 168                 putwchar('\n');
 169 }
 170
 171 static void
 172 r_columnate(void)
 173 {
 174         int base, chcnt, cnt, col, endcol, numcols, numrows, row;
 175
 176         numcols = termwidth / maxlength;
 177         numrows = entries / numcols;
 178         if (entries % numcols)
 179                 ++numrows;
 180
 181         for (row = 0; row < numrows; ++row) {
 182                 endcol = maxlength;
 183                 for (base = row, chcnt = col = 0; col < numcols; ++col) {
 184                         wprintf(L"%ls", list[base]);
 185                         chcnt += width(list[base]);
 186                         if ((base += numrows) >= entries)
 187                                 break;
 188                         while ((cnt = roundup(chcnt + 1, TAB)) <= endcol) {
 189                                 (void)putwchar('\t');
 190                                 chcnt = cnt;
 191                         }
 192                         endcol += maxlength;
 193                 }
 194                 putwchar('\n');
 195         }
 196 }
 197
 198 static void
 199 print(void)
 200 {
 201         int cnt;
 202         wchar_t **lp;
 203
 204         for (cnt = entries, lp = list; cnt--; ++lp)
 205                 (void)wprintf(L"%ls\n", *lp);
 206 }
 207
 208 typedef struct _tbl {
 209         wchar_t **list;
 210         int cols, *len;
 211 } TBL;
 212 #define DEFCOLS 25
 213
 214 static void
 215 maketbl(void)
 216 {
 217         TBL *t;
 218         int coloff, cnt;
 219         wchar_t *p, **lp;
 220         int *lens, maxcols;
 221         TBL *tbl;
 222         wchar_t **cols;
 223         wchar_t *last;
 224
 225         if ((t = tbl = calloc(entries, sizeof(TBL))) == NULL)
 226                 err(1, NULL);
 227         if ((cols = calloc((maxcols = DEFCOLS), sizeof(*cols))) == NULL)
 228                 err(1, NULL);
 229         if ((lens = calloc(maxcols, sizeof(int))) == NULL)
 230                 err(1, NULL);
 231         for (cnt = 0, lp = list; cnt < entries; ++cnt, ++lp, ++t) {
 232                 for (coloff = 0, p = *lp;
 233                     (cols[coloff] = wcstok(p, separator, &last));
 234                     p = NULL)
 235                         if (++coloff == maxcols) {
 236                                 if (!(cols = realloc(cols, ((u_int)maxcols +
 237                                     DEFCOLS) * sizeof(wchar_t *))) ||
 238                                     !(lens = realloc(lens,
 239                                     ((u_int)maxcols + DEFCOLS) * sizeof(int))))
 240                                         err(1, NULL);
 241                                 memset((char *)lens + maxcols * sizeof(int),
 242                                     0, DEFCOLS * sizeof(int));
 243                                 maxcols += DEFCOLS;
 244                         }
 245                 if ((t->list = calloc(coloff, sizeof(*t->list))) == NULL)
 246                         err(1, NULL);
 247                 if ((t->len = calloc(coloff, sizeof(int))) == NULL)
 248                         err(1, NULL);
 249                 for (t->cols = coloff; --coloff >= 0;) {
 250                         t->list[coloff] = cols[coloff];
 251                         t->len[coloff] = width(cols[coloff]);
 252                         if (t->len[coloff] > lens[coloff])
 253                                 lens[coloff] = t->len[coloff];
 254                 }
 255         }
 256         for (cnt = 0, t = tbl; cnt < entries; ++cnt, ++t) {
 257                 for (coloff = 0; coloff < t->cols  - 1; ++coloff)
 258                         (void)wprintf(L"%ls%*ls", t->list[coloff],
 259                             lens[coloff] - t->len[coloff] + 2, L" ");
 260                 (void)wprintf(L"%ls\n", t->list[coloff]);
 261         }
 262 }
 263
 264 #define DEFNUM          1000
 265 #define MAXLINELEN      (LINE_MAX + 1)
 266
 267 static void
 268 input(FILE *fp)
 269 {
 270         static int maxentry;
 271         int len;
 272         wchar_t *p, buf[MAXLINELEN];
 273
 274         if (!list)
 275                 if ((list = calloc((maxentry = DEFNUM), sizeof(*list))) ==
 276                     NULL)
 277                         err(1, NULL);
 278         while (fgetws(buf, MAXLINELEN, fp)) {
 279                 for (p = buf; *p && iswspace(*p); ++p);
 280                 if (!*p)
 281                         continue;
 282                 if (!(p = wcschr(p, L'\n'))) {
 283                         warnx("line too long");
 284                         eval = 1;
 285                         continue;
 286                 }
 287                 *p = L'\0';
 288                 len = width(buf);
 289                 if (maxlength < len)
 290                         maxlength = len;
 291                 if (entries == maxentry) {
 292                         maxentry += DEFNUM;
 293                         if (!(list = realloc(list,
 294                             (u_int)maxentry * sizeof(*list))))
 295                                 err(1, NULL);
 296                 }
 297                 list[entries] = malloc((wcslen(buf) + 1) * sizeof(wchar_t));
 298                 if (list[entries] == NULL)
 299                         err(1, NULL);
 300                 wcscpy(list[entries], buf);
 301                 entries++;
 302         }
 303 }
 304
 305 /* Like wcswidth(), but ignores non-printing characters. */
 306 static int
 307 width(const wchar_t *wcs)
 308 {
 309         int w, cw;
 310
 311         for (w = 0; *wcs != L'\0'; wcs++)
 312                 if ((cw = wcwidth(*wcs)) > 0)
 313                         w += cw;
 314         return (w);
 315 }
 316
 317 static void
 318 usage(void)
 319 {
 320
 321         (void)fprintf(stderr,
 322             "usage: column [-tx] [-c columns] [-s sep] [file ...]\n");
 323         exit(1);
 324 }