column.c revision 1.15
1 /* $NetBSD: column.c,v 1.15 2006/08/26 18:17:41 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 1.15 2006/08/26 18:17:41 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 #include <util.h> 57 58 #define TAB 8 59 60 static void c_columnate(void); 61 static void input(FILE *); 62 static void maketbl(void); 63 static void print(void); 64 static void r_columnate(void); 65 static void usage(void) __attribute__((__noreturn__)); 66 67 static int termwidth = 80; /* default terminal width */ 68 69 static int entries; /* number of records */ 70 static int eval; /* exit value */ 71 static int maxlength; /* longest record */ 72 static char **list; /* array of pointers to records */ 73 static const char *separator = "\t "; /* field separator for table option */ 74 75 int 76 main(int argc, char **argv) 77 { 78 struct winsize win; 79 FILE *fp; 80 int ch, tflag, xflag; 81 const char *p; 82 83 setprogname(*argv); 84 85 if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &win) == -1 || !win.ws_col) { 86 if ((p = getenv("COLUMNS")) != NULL) 87 termwidth = atoi(p); 88 } else 89 termwidth = win.ws_col; 90 91 tflag = xflag = 0; 92 while ((ch = getopt(argc, argv, "c:s:tx")) != -1) 93 switch(ch) { 94 case 'c': 95 termwidth = atoi(optarg); 96 break; 97 case 's': 98 separator = optarg; 99 break; 100 case 't': 101 tflag = 1; 102 break; 103 case 'x': 104 xflag = 1; 105 break; 106 case '?': 107 default: 108 usage(); 109 } 110 argc -= optind; 111 argv += optind; 112 113 if (!*argv) 114 input(stdin); 115 else for (; *argv; ++argv) 116 if ((fp = fopen(*argv, "r")) != NULL) { 117 input(fp); 118 (void)fclose(fp); 119 } else { 120 warn("Cannot open `%s'", *argv); 121 eval = 1; 122 } 123 124 if (!entries) 125 return eval; 126 127 maxlength = (maxlength + TAB) & ~(TAB - 1); 128 if (tflag) 129 maketbl(); 130 else if (maxlength >= termwidth) 131 print(); 132 else if (xflag) 133 c_columnate(); 134 else 135 r_columnate(); 136 return eval; 137 } 138 139 static void 140 c_columnate(void) 141 { 142 int chcnt, col, cnt, endcol, numcols; 143 char **lp; 144 145 numcols = termwidth / maxlength; 146 endcol = maxlength; 147 for (chcnt = col = 0, lp = list;; ++lp) { 148 chcnt += printf("%s", *lp); 149 if (!--entries) 150 break; 151 if (++col == numcols) { 152 chcnt = col = 0; 153 endcol = maxlength; 154 (void)putchar('\n'); 155 } else { 156 while ((cnt = ((chcnt + TAB) & ~(TAB - 1))) <= endcol) { 157 (void)putchar('\t'); 158 chcnt = cnt; 159 } 160 endcol += maxlength; 161 } 162 } 163 if (chcnt) 164 (void)putchar('\n'); 165 } 166 167 static void 168 r_columnate(void) 169 { 170 int base, chcnt, cnt, col, endcol, numcols, numrows, row; 171 172 numcols = termwidth / maxlength; 173 numrows = entries / numcols; 174 if (entries % numcols) 175 ++numrows; 176 177 for (row = 0; row < numrows; ++row) { 178 endcol = maxlength; 179 for (base = row, chcnt = col = 0; col < numcols; ++col) { 180 chcnt += printf("%s", list[base]); 181 if ((base += numrows) >= entries) 182 break; 183 while ((cnt = ((chcnt + TAB) & ~(TAB - 1))) <= endcol) { 184 (void)putchar('\t'); 185 chcnt = cnt; 186 } 187 endcol += maxlength; 188 } 189 (void)putchar('\n'); 190 } 191 } 192 193 static void 194 print(void) 195 { 196 int cnt; 197 char **lp; 198 199 for (cnt = entries, lp = list; cnt--; ++lp) 200 (void)printf("%s\n", *lp); 201 } 202 203 typedef struct _tbl { 204 char **list; 205 int cols, *len; 206 } TBL; 207 #define DEFCOLS 25 208 209 static void 210 maketbl(void) 211 { 212 TBL *t; 213 int coloff, cnt; 214 char *p, **lp; 215 int *lens, *nlens, maxcols; 216 TBL *tbl; 217 char **cols, **ncols; 218 219 t = tbl = emalloc(entries * sizeof(TBL)); 220 cols = emalloc((maxcols = DEFCOLS) * sizeof(char *)); 221 lens = emalloc(maxcols * sizeof(int)); 222 for (cnt = 0, lp = list; cnt < entries; ++cnt, ++lp, ++t) { 223 for (coloff = 0, p = *lp; 224 (cols[coloff] = strtok(p, separator)) != NULL; 225 p = NULL) 226 if (++coloff == maxcols) { 227 ncols = erealloc(cols, maxcols + 228 DEFCOLS * sizeof(char *)); 229 nlens = erealloc(lens, maxcols + 230 DEFCOLS * sizeof(int)); 231 cols = ncols; 232 lens = nlens; 233 (void)memset((char *)(void *)lens + maxcols * 234 sizeof(int), 0, DEFCOLS * sizeof(int)); 235 maxcols += DEFCOLS; 236 } 237 t->list = emalloc(coloff * sizeof(char *)); 238 t->len = emalloc(coloff * sizeof(int)); 239 for (t->cols = coloff; --coloff >= 0;) { 240 t->list[coloff] = cols[coloff]; 241 t->len[coloff] = strlen(cols[coloff]); 242 if (t->len[coloff] > lens[coloff]) 243 lens[coloff] = t->len[coloff]; 244 } 245 } 246 for (cnt = 0, t = tbl; cnt < entries; ++cnt, ++t) { 247 for (coloff = 0; coloff < t->cols - 1; ++coloff) 248 (void)printf("%s%*s", t->list[coloff], 249 lens[coloff] - t->len[coloff] + 2, " "); 250 (void)printf("%s\n", t->list[coloff]); 251 } 252 free(tbl); 253 free(cols); 254 free(lens); 255 } 256 257 #define DEFNUM 1000 258 #define MAXLINELEN (LINE_MAX + 1) 259 260 static void 261 input(FILE *fp) 262 { 263 static int maxentry; 264 int len; 265 char *p, buf[MAXLINELEN]; 266 char **n; 267 268 if (!list) 269 list = emalloc((maxentry = DEFNUM) * sizeof(char *)); 270 while (fgets(buf, MAXLINELEN, fp)) { 271 for (p = buf; *p && isspace((unsigned char)*p); ++p); 272 if (!*p) 273 continue; 274 if (!(p = strchr(p, '\n'))) { 275 warnx("line too long"); 276 eval = 1; 277 continue; 278 } 279 *p = '\0'; 280 len = p - buf; 281 if (maxlength < len) 282 maxlength = len; 283 if (entries == maxentry) { 284 maxentry += DEFNUM; 285 n = erealloc(list, maxentry * sizeof(char *)); 286 list = n; 287 } 288 list[entries++] = estrdup(buf); 289 } 290 } 291 292 static void 293 usage(void) 294 { 295 296 (void)fprintf(stderr, 297 "Usage: %s [-tx] [-c columns] [-s sep] [file ...]\n", 298 getprogname()); 299 exit(1); 300 } 301
Indexes created Mon Sep 29 21:09:56 GMT 2025