1 /* $NetBSD: column.c,v 1.13 2005/12/17 18:10:55 christos 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\n\ 35 The Regents of the University of California. All rights reserved.\n"); 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 1.13 2005/12/17 18:10:55 christos 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 57 #define TAB 8 58 59 static void c_columnate(void); 60 static void *emalloc(size_t); 61 static void *erealloc(void *, size_t); 62 static char *estrdup(const char *); 63 static void input(FILE *); 64 static void maketbl(void); 65 static void print(void); 66 static void r_columnate(void); 67 static void usage(void) __attribute__((__noreturn__)); 68 69 static int termwidth = 80; /* default terminal width */ 70 71 static int entries; /* number of records */ 72 static int eval; /* exit value */ 73 static int maxlength; /* longest record */ 74 static char **list; /* array of pointers to records */ 75 static const char *separator = "\t "; /* field separator for table option */ 76 77 int 78 main(int argc, char **argv) 79 { 80 struct winsize win; 81 FILE *fp; 82 int ch, tflag, xflag; 83 const char *p; 84 85 setprogname(*argv); 86 87 if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &win) == -1 || !win.ws_col) { 88 if ((p = getenv("COLUMNS")) != NULL) 89 termwidth = atoi(p); 90 } else 91 termwidth = win.ws_col; 92 93 tflag = xflag = 0; 94 while ((ch = getopt(argc, argv, "c:s:tx")) != -1) 95 switch(ch) { 96 case 'c': 97 termwidth = atoi(optarg); 98 break; 99 case 's': 100 separator = optarg; 101 break; 102 case 't': 103 tflag = 1; 104 break; 105 case 'x': 106 xflag = 1; 107 break; 108 case '?': 109 default: 110 usage(); 111 } 112 argc -= optind; 113 argv += optind; 114 115 if (!*argv) 116 input(stdin); 117 else for (; *argv; ++argv) 118 if ((fp = fopen(*argv, "r")) != NULL) { 119 input(fp); 120 (void)fclose(fp); 121 } else { 122 warn("Cannot open `%s'", *argv); 123 eval = 1; 124 } 125 126 if (!entries) 127 return eval; 128 129 maxlength = (maxlength + TAB) & ~(TAB - 1); 130 if (tflag) 131 maketbl(); 132 else if (maxlength >= termwidth) 133 print(); 134 else if (xflag) 135 c_columnate(); 136 else 137 r_columnate(); 138 return eval; 139 } 140 141 static void 142 c_columnate(void) 143 { 144 int chcnt, col, cnt, endcol, numcols; 145 char **lp; 146 147 numcols = termwidth / maxlength; 148 endcol = maxlength; 149 for (chcnt = col = 0, lp = list;; ++lp) { 150 chcnt += printf("%s", *lp); 151 if (!--entries) 152 break; 153 if (++col == numcols) { 154 chcnt = col = 0; 155 endcol = maxlength; 156 (void)putchar('\n'); 157 } else { 158 while ((cnt = ((chcnt + TAB) & ~(TAB - 1))) <= endcol) { 159 (void)putchar('\t'); 160 chcnt = cnt; 161 } 162 endcol += maxlength; 163 } 164 } 165 if (chcnt) 166 (void)putchar('\n'); 167 } 168 169 static void 170 r_columnate(void) 171 { 172 int base, chcnt, cnt, col, endcol, numcols, numrows, row; 173 174 numcols = termwidth / maxlength; 175 numrows = entries / numcols; 176 if (entries % numcols) 177 ++numrows; 178 179 for (row = 0; row < numrows; ++row) { 180 endcol = maxlength; 181 for (base = row, chcnt = col = 0; col < numcols; ++col) { 182 chcnt += printf("%s", list[base]); 183 if ((base += numrows) >= entries) 184 break; 185 while ((cnt = ((chcnt + TAB) & ~(TAB - 1))) <= endcol) { 186 (void)putchar('\t'); 187 chcnt = cnt; 188 } 189 endcol += maxlength; 190 } 191 (void)putchar('\n'); 192 } 193 } 194 195 static void 196 print(void) 197 { 198 int cnt; 199 char **lp; 200 201 for (cnt = entries, lp = list; cnt--; ++lp) 202 (void)printf("%s\n", *lp); 203 } 204 205 typedef struct _tbl { 206 char **list; 207 int cols, *len; 208 } TBL; 209 #define DEFCOLS 25 210 211 static void 212 maketbl(void) 213 { 214 TBL *t; 215 int coloff, cnt; 216 char *p, **lp; 217 int *lens, *nlens, maxcols; 218 TBL *tbl; 219 char **cols, **ncols; 220 221 t = tbl = emalloc(entries * sizeof(TBL)); 222 cols = emalloc((maxcols = DEFCOLS) * sizeof(char *)); 223 lens = emalloc(maxcols * sizeof(int)); 224 for (cnt = 0, lp = list; cnt < entries; ++cnt, ++lp, ++t) { 225 for (coloff = 0, p = *lp; 226 (cols[coloff] = strtok(p, separator)) != NULL; 227 p = NULL) 228 if (++coloff == maxcols) { 229 ncols = erealloc(cols, maxcols + 230 DEFCOLS * sizeof(char *)); 231 nlens = erealloc(lens, maxcols + 232 DEFCOLS * sizeof(int)); 233 cols = ncols; 234 lens = nlens; 235 (void)memset((char *)(void *)lens + maxcols * 236 sizeof(int), 0, DEFCOLS * sizeof(int)); 237 maxcols += DEFCOLS; 238 } 239 t->list = emalloc(coloff * sizeof(char *)); 240 t->len = emalloc(coloff * sizeof(int)); 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 } 255 256 #define DEFNUM 1000 257 #define MAXLINELEN (LINE_MAX + 1) 258 259 static void 260 input(FILE *fp) 261 { 262 static int maxentry; 263 int len; 264 char *p, buf[MAXLINELEN]; 265 char **n; 266 267 if (!list) 268 list = emalloc((maxentry = DEFNUM) * sizeof(char *)); 269 while (fgets(buf, MAXLINELEN, fp)) { 270 for (p = buf; *p && isspace((unsigned char)*p); ++p); 271 if (!*p) 272 continue; 273 if (!(p = strchr(p, '\n'))) { 274 warnx("line too long"); 275 eval = 1; 276 continue; 277 } 278 *p = '\0'; 279 len = p - buf; 280 if (maxlength < len) 281 maxlength = len; 282 if (entries == maxentry) { 283 maxentry += DEFNUM; 284 n = erealloc(list, maxentry * sizeof(char *)); 285 list = n; 286 } 287 list[entries++] = estrdup(buf); 288 } 289 } 290 291 static void * 292 emalloc(size_t size) 293 { 294 void *p; 295 296 if ((p = malloc(size)) == NULL) 297 err(1, "malloc"); 298 (void)memset(p, 0, size); 299 return (p); 300 } 301 302 static void * 303 erealloc(void *op, size_t size) 304 { 305 void *p; 306 307 if ((p = realloc(op, size)) == NULL) 308 err(1, "realloc"); 309 return p; 310 } 311 312 static char * 313 estrdup(const char *str) 314 { 315 char *p; 316 317 if ((p = strdup(str)) == NULL) 318 err(1, "strdup"); 319 return p; 320 } 321 322 static void 323 usage(void) 324 { 325 326 (void)fprintf(stderr, 327 "Usage: %s [-tx] [-c columns] [-s sep] [file ...]\n", 328 getprogname()); 329 exit(1); 330 } 331