302 lines
7.1 KiB
C
302 lines
7.1 KiB
C
/* $NetBSD: column.c,v 1.16 2006/12/09 21:42:40 christos Exp $ */
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/*
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* Copyright (c) 1989, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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__COPYRIGHT("@(#) Copyright (c) 1989, 1993, 1994\n\
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The Regents of the University of California. All rights reserved.\n");
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#endif /* not lint */
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)column.c 8.4 (Berkeley) 5/4/95";
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#endif
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__RCSID("$NetBSD: column.c,v 1.16 2006/12/09 21:42:40 christos Exp $");
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#endif /* not lint */
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#include <sys/types.h>
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#include <sys/ioctl.h>
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#include <ctype.h>
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#include <err.h>
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#include <termios.h>
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#include <limits.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <util.h>
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#define TAB 8
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#define TABROUND(l) (((l) + TAB) & ~(TAB - 1))
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static void c_columnate(void);
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static void input(FILE *);
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static void maketbl(void);
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static void print(void);
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static void r_columnate(void);
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static void usage(void) __attribute__((__noreturn__));
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static int termwidth = 80; /* default terminal width */
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static int entries; /* number of records */
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static int eval; /* exit value */
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static int maxlength; /* longest record */
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static char **list; /* array of pointers to records */
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static const char *separator = "\t "; /* field separator for table option */
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int
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main(int argc, char **argv)
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{
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struct winsize win;
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FILE *fp;
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int ch, tflag, xflag;
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const char *p;
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setprogname(*argv);
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if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &win) == -1 || !win.ws_col) {
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if ((p = getenv("COLUMNS")) != NULL)
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termwidth = atoi(p);
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} else
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termwidth = win.ws_col;
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tflag = xflag = 0;
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while ((ch = getopt(argc, argv, "c:s:tx")) != -1)
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switch(ch) {
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case 'c':
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termwidth = atoi(optarg);
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break;
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case 's':
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separator = optarg;
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break;
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case 't':
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tflag = 1;
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break;
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case 'x':
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xflag = 1;
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break;
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case '?':
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default:
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usage();
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}
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argc -= optind;
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argv += optind;
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if (!*argv)
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input(stdin);
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else for (; *argv; ++argv)
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if ((fp = fopen(*argv, "r")) != NULL) {
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input(fp);
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(void)fclose(fp);
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} else {
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warn("Cannot open `%s'", *argv);
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eval = 1;
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}
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if (!entries)
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return eval;
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maxlength = TABROUND(maxlength);
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if (tflag)
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maketbl();
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else if (maxlength >= termwidth)
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print();
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else if (xflag)
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c_columnate();
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else
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r_columnate();
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return eval;
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}
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static void
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c_columnate(void)
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{
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int chcnt, col, cnt, endcol, numcols;
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char **lp;
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numcols = termwidth / maxlength;
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endcol = maxlength;
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for (chcnt = col = 0, lp = list;; ++lp) {
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chcnt += printf("%s", *lp);
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if (!--entries)
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break;
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if (++col == numcols) {
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chcnt = col = 0;
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endcol = maxlength;
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(void)putchar('\n');
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} else {
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while ((cnt = TABROUND(chcnt)) <= endcol) {
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(void)putchar('\t');
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chcnt = cnt;
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}
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endcol += maxlength;
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}
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}
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if (chcnt)
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(void)putchar('\n');
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}
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static void
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r_columnate(void)
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{
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int base, chcnt, cnt, col, endcol, numcols, numrows, row;
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numcols = termwidth / maxlength;
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numrows = entries / numcols;
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if (entries % numcols)
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++numrows;
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for (row = 0; row < numrows; ++row) {
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endcol = maxlength;
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for (base = row, chcnt = col = 0; col < numcols; ++col) {
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chcnt += printf("%s", list[base]);
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if ((base += numrows) >= entries)
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break;
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while ((cnt = TABROUND(chcnt)) <= endcol) {
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(void)putchar('\t');
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chcnt = cnt;
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}
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endcol += maxlength;
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}
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(void)putchar('\n');
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}
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}
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static void
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print(void)
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{
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int cnt;
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char **lp;
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for (cnt = entries, lp = list; cnt--; ++lp)
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(void)printf("%s\n", *lp);
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}
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typedef struct _tbl {
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char **list;
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int cols, *len;
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} TBL;
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#define DEFCOLS 25
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static void
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maketbl(void)
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{
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TBL *t;
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int coloff, cnt;
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char *p, **lp;
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int *lens, *nlens, maxcols;
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TBL *tbl;
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char **cols, **ncols;
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t = tbl = ecalloc(entries, sizeof(TBL));
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cols = ecalloc((maxcols = DEFCOLS), sizeof(char *));
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lens = ecalloc(maxcols, sizeof(int));
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for (cnt = 0, lp = list; cnt < entries; ++cnt, ++lp, ++t) {
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for (coloff = 0, p = *lp;
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(cols[coloff] = strtok(p, separator)) != NULL;
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p = NULL)
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if (++coloff == maxcols) {
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ncols = erealloc(cols, maxcols +
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DEFCOLS * sizeof(char *));
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nlens = erealloc(lens, maxcols +
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DEFCOLS * sizeof(int));
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cols = ncols;
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lens = nlens;
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(void)memset(lens + maxcols, 0,
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DEFCOLS * sizeof(int));
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maxcols += DEFCOLS;
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}
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t->list = ecalloc(coloff, sizeof(char *));
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t->len = ecalloc(coloff, sizeof(int));
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for (t->cols = coloff; --coloff >= 0;) {
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t->list[coloff] = cols[coloff];
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t->len[coloff] = strlen(cols[coloff]);
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if (t->len[coloff] > lens[coloff])
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lens[coloff] = t->len[coloff];
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}
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}
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for (cnt = 0, t = tbl; cnt < entries; ++cnt, ++t) {
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for (coloff = 0; coloff < t->cols - 1; ++coloff)
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(void)printf("%s%*s", t->list[coloff],
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lens[coloff] - t->len[coloff] + 2, " ");
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(void)printf("%s\n", t->list[coloff]);
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}
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free(tbl);
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free(cols);
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free(lens);
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}
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#define DEFNUM 1000
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#define MAXLINELEN (LINE_MAX + 1)
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static void
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input(FILE *fp)
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{
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static int maxentry;
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int len;
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char *p, buf[MAXLINELEN];
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char **n;
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if (!list)
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list = ecalloc((maxentry = DEFNUM), sizeof(char *));
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while (fgets(buf, MAXLINELEN, fp)) {
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for (p = buf; *p && isspace((unsigned char)*p); ++p);
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if (!*p)
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continue;
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if (!(p = strchr(p, '\n'))) {
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warnx("line too long");
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eval = 1;
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continue;
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}
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*p = '\0';
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len = p - buf;
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if (maxlength < len)
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maxlength = len;
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if (entries == maxentry) {
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maxentry += DEFNUM;
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n = erealloc(list, maxentry * sizeof(char *));
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list = n;
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}
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list[entries++] = estrdup(buf);
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}
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}
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static void
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usage(void)
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{
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(void)fprintf(stderr,
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"Usage: %s [-tx] [-c columns] [-s sep] [file ...]\n",
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getprogname());
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exit(1);
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}
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