Annotation of src/usr.bin/column/column.c, Revision 1.1
1.1 ! deraadt 1: /* $NetBSD: column.c,v 1.4 1995/09/02 05:53:03 jtc 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. All advertising materials mentioning features or use of this software
! 16: * must display the following acknowledgement:
! 17: * This product includes software developed by the University of
! 18: * California, Berkeley and its contributors.
! 19: * 4. Neither the name of the University nor the names of its contributors
! 20: * may be used to endorse or promote products derived from this software
! 21: * without specific prior written permission.
! 22: *
! 23: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 24: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 25: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 26: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 27: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 28: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 29: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 30: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 31: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 32: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 33: * SUCH DAMAGE.
! 34: */
! 35:
! 36: #ifndef lint
! 37: static char copyright[] =
! 38: "@(#) Copyright (c) 1989, 1993, 1994\n\
! 39: The Regents of the University of California. All rights reserved.\n";
! 40: #endif /* not lint */
! 41:
! 42: #ifndef lint
! 43: #if 0
! 44: static char sccsid[] = "@(#)column.c 8.4 (Berkeley) 5/4/95";
! 45: #endif
! 46: static char rcsid[] = "$NetBSD: column.c,v 1.4 1995/09/02 05:53:03 jtc Exp $";
! 47: #endif /* not lint */
! 48:
! 49: #include <sys/types.h>
! 50: #include <sys/ioctl.h>
! 51:
! 52: #include <ctype.h>
! 53: #include <err.h>
! 54: #include <limits.h>
! 55: #include <stdio.h>
! 56: #include <stdlib.h>
! 57: #include <string.h>
! 58: #include <unistd.h>
! 59:
! 60: void c_columnate __P((void));
! 61: void *emalloc __P((int));
! 62: void input __P((FILE *));
! 63: void maketbl __P((void));
! 64: void print __P((void));
! 65: void r_columnate __P((void));
! 66: void usage __P((void));
! 67:
! 68: int termwidth = 80; /* default terminal width */
! 69:
! 70: int entries; /* number of records */
! 71: int eval; /* exit value */
! 72: int maxlength; /* longest record */
! 73: char **list; /* array of pointers to records */
! 74: char *separator = "\t "; /* field separator for table option */
! 75:
! 76: int
! 77: main(argc, argv)
! 78: int argc;
! 79: char **argv;
! 80: {
! 81: struct winsize win;
! 82: FILE *fp;
! 83: int ch, tflag, xflag;
! 84: char *p;
! 85:
! 86: if (ioctl(1, TIOCGWINSZ, &win) == -1 || !win.ws_col) {
! 87: if (p = getenv("COLUMNS"))
! 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")) != EOF)
! 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")) {
! 118: input(fp);
! 119: (void)fclose(fp);
! 120: } else {
! 121: warn("%s", *argv);
! 122: eval = 1;
! 123: }
! 124:
! 125: if (!entries)
! 126: exit(eval);
! 127:
! 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: exit(eval);
! 137: }
! 138:
! 139: #define TAB 8
! 140: void
! 141: c_columnate()
! 142: {
! 143: int chcnt, col, cnt, endcol, numcols;
! 144: char **lp;
! 145:
! 146: maxlength = (maxlength + TAB) & ~(TAB - 1);
! 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: 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: putchar('\n');
! 167: }
! 168:
! 169: void
! 170: r_columnate()
! 171: {
! 172: int base, chcnt, cnt, col, endcol, numcols, numrows, row;
! 173:
! 174: maxlength = (maxlength + TAB) & ~(TAB - 1);
! 175: numcols = termwidth / maxlength;
! 176: numrows = entries / numcols;
! 177: if (entries % numcols)
! 178: ++numrows;
! 179:
! 180: for (row = 0; row < numrows; ++row) {
! 181: endcol = maxlength;
! 182: for (base = row, chcnt = col = 0; col < numcols; ++col) {
! 183: chcnt += printf("%s", list[base]);
! 184: if ((base += numrows) >= entries)
! 185: break;
! 186: while ((cnt = (chcnt + TAB & ~(TAB - 1))) <= endcol) {
! 187: (void)putchar('\t');
! 188: chcnt = cnt;
! 189: }
! 190: endcol += maxlength;
! 191: }
! 192: putchar('\n');
! 193: }
! 194: }
! 195:
! 196: void
! 197: print()
! 198: {
! 199: int cnt;
! 200: char **lp;
! 201:
! 202: for (cnt = entries, lp = list; cnt--; ++lp)
! 203: (void)printf("%s\n", *lp);
! 204: }
! 205:
! 206: typedef struct _tbl {
! 207: char **list;
! 208: int cols, *len;
! 209: } TBL;
! 210: #define DEFCOLS 25
! 211:
! 212: void
! 213: maketbl()
! 214: {
! 215: TBL *t;
! 216: int coloff, cnt;
! 217: char *p, **lp;
! 218: int *lens, maxcols;
! 219: TBL *tbl;
! 220: char **cols;
! 221:
! 222: t = tbl = emalloc(entries * sizeof(TBL));
! 223: cols = emalloc((maxcols = DEFCOLS) * sizeof(char *));
! 224: lens = emalloc(maxcols * sizeof(int));
! 225: for (cnt = 0, lp = list; cnt < entries; ++cnt, ++lp, ++t) {
! 226: for (coloff = 0, p = *lp; cols[coloff] = strtok(p, separator);
! 227: p = NULL)
! 228: if (++coloff == maxcols) {
! 229: if (!(cols = realloc(cols, (u_int)maxcols +
! 230: DEFCOLS * sizeof(char *))) ||
! 231: !(lens = realloc(lens,
! 232: (u_int)maxcols + DEFCOLS * sizeof(int))))
! 233: err(1, NULL);
! 234: memset((char *)lens + maxcols * sizeof(int),
! 235: 0, DEFCOLS * sizeof(int));
! 236: maxcols += DEFCOLS;
! 237: }
! 238: t->list = emalloc(coloff * sizeof(char *));
! 239: t->len = emalloc(coloff * sizeof(int));
! 240: for (t->cols = coloff; --coloff >= 0;) {
! 241: t->list[coloff] = cols[coloff];
! 242: t->len[coloff] = strlen(cols[coloff]);
! 243: if (t->len[coloff] > lens[coloff])
! 244: lens[coloff] = t->len[coloff];
! 245: }
! 246: }
! 247: for (cnt = 0, t = tbl; cnt < entries; ++cnt, ++t) {
! 248: for (coloff = 0; coloff < t->cols - 1; ++coloff)
! 249: (void)printf("%s%*s", t->list[coloff],
! 250: lens[coloff] - t->len[coloff] + 2, " ");
! 251: (void)printf("%s\n", t->list[coloff]);
! 252: }
! 253: }
! 254:
! 255: #define DEFNUM 1000
! 256: #define MAXLINELEN (LINE_MAX + 1)
! 257:
! 258: void
! 259: input(fp)
! 260: FILE *fp;
! 261: {
! 262: static int maxentry;
! 263: int len;
! 264: char *p, buf[MAXLINELEN];
! 265:
! 266: if (!list)
! 267: list = emalloc((maxentry = DEFNUM) * sizeof(char *));
! 268: while (fgets(buf, MAXLINELEN, fp)) {
! 269: for (p = buf; *p && isspace(*p); ++p);
! 270: if (!*p)
! 271: continue;
! 272: if (!(p = strchr(p, '\n'))) {
! 273: warnx("line too long");
! 274: eval = 1;
! 275: continue;
! 276: }
! 277: *p = '\0';
! 278: len = p - buf;
! 279: if (maxlength < len)
! 280: maxlength = len;
! 281: if (entries == maxentry) {
! 282: maxentry += DEFNUM;
! 283: if (!(list = realloc(list,
! 284: (u_int)maxentry * sizeof(char *))))
! 285: err(1, NULL);
! 286: }
! 287: list[entries++] = strdup(buf);
! 288: }
! 289: }
! 290:
! 291: void *
! 292: emalloc(size)
! 293: int size;
! 294: {
! 295: char *p;
! 296:
! 297: if (!(p = malloc(size)))
! 298: err(1, NULL);
! 299: memset(p, 0, size);
! 300: return (p);
! 301: }
! 302:
! 303: void
! 304: usage()
! 305: {
! 306:
! 307: (void)fprintf(stderr,
! 308: "usage: column [-tx] [-c columns] [file ...]\n");
! 309: exit(1);
! 310: }
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