NetBSD-5.0.2/usr.bin/column/column.c
/* $NetBSD: column.c,v 1.21 2008/07/21 14:19:21 lukem Exp $ */
/*
* Copyright (c) 1989, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#ifndef lint
__COPYRIGHT("@(#) Copyright (c) 1989, 1993, 1994\
The Regents of the University of California. All rights reserved.");
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)column.c 8.4 (Berkeley) 5/4/95";
#endif
__RCSID("$NetBSD: column.c,v 1.21 2008/07/21 14:19:21 lukem Exp $");
#endif /* not lint */
#include <sys/types.h>
#include <sys/ioctl.h>
#include <ctype.h>
#include <err.h>
#include <termios.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <util.h>
#define TAB 8
#define TABROUND(l) (((l) + TAB) & ~(TAB - 1))
static void c_columnate(void);
static void input(FILE *);
static void maketbl(void);
static void print(void);
static void r_columnate(void);
static void usage(void) __dead;
static int termwidth = 80; /* default terminal width */
static int entries; /* number of records */
static int eval; /* exit value */
static int maxlength; /* longest record */
static char **list; /* array of pointers to records */
static const char *separator = "\t "; /* field separator for table option */
int
main(int argc, char **argv)
{
struct winsize win;
FILE *fp;
int ch, tflag, xflag;
const char *p;
setprogname(*argv);
if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &win) == -1 || !win.ws_col) {
if ((p = getenv("COLUMNS")) != NULL)
termwidth = atoi(p);
} else
termwidth = win.ws_col;
tflag = xflag = 0;
while ((ch = getopt(argc, argv, "c:s:tx")) != -1)
switch(ch) {
case 'c':
termwidth = atoi(optarg);
break;
case 's':
separator = optarg;
break;
case 't':
tflag = 1;
break;
case 'x':
xflag = 1;
break;
case '?':
default:
usage();
}
argc -= optind;
argv += optind;
if (!*argv)
input(stdin);
else for (; *argv; ++argv)
if ((fp = fopen(*argv, "r")) != NULL) {
input(fp);
(void)fclose(fp);
} else {
warn("Cannot open `%s'", *argv);
eval = 1;
}
if (!entries)
return eval;
maxlength = TABROUND(maxlength);
if (tflag)
maketbl();
else if (maxlength >= termwidth)
print();
else if (xflag)
c_columnate();
else
r_columnate();
return eval;
}
static void
c_columnate(void)
{
int chcnt, col, cnt, endcol, numcols;
char **lp;
numcols = termwidth / maxlength;
endcol = maxlength;
for (chcnt = col = 0, lp = list;; ++lp) {
chcnt += printf("%s", *lp);
if (!--entries)
break;
if (++col == numcols) {
chcnt = col = 0;
endcol = maxlength;
(void)putchar('\n');
} else {
while ((cnt = TABROUND(chcnt)) <= endcol) {
(void)putchar('\t');
chcnt = cnt;
}
endcol += maxlength;
}
}
if (chcnt)
(void)putchar('\n');
}
static void
r_columnate(void)
{
int base, chcnt, cnt, col, endcol, numcols, numrows, row;
numcols = termwidth / maxlength;
numrows = entries / numcols;
if (entries % numcols)
++numrows;
for (row = 0; row < numrows; ++row) {
endcol = maxlength;
for (base = row, chcnt = col = 0; col < numcols; ++col) {
chcnt += printf("%s", list[base]);
if ((base += numrows) >= entries)
break;
while ((cnt = TABROUND(chcnt)) <= endcol) {
(void)putchar('\t');
chcnt = cnt;
}
endcol += maxlength;
}
(void)putchar('\n');
}
}
static void
print(void)
{
int cnt;
char **lp;
for (cnt = entries, lp = list; cnt--; ++lp)
(void)printf("%s\n", *lp);
}
typedef struct _tbl {
char **list;
int cols, *len;
} TBL;
#define DEFCOLS 25
static void
maketbl(void)
{
TBL *t;
int coloff, cnt;
char *p, **lp;
int *lens, *nlens, maxcols;
TBL *tbl;
char **cols, **ncols;
t = tbl = ecalloc(entries, sizeof(*t));
cols = ecalloc((maxcols = DEFCOLS), sizeof(*cols));
lens = ecalloc(maxcols, sizeof(*lens));
for (cnt = 0, lp = list; cnt < entries; ++cnt, ++lp, ++t) {
for (coloff = 0, p = *lp;
(cols[coloff] = strtok(p, separator)) != NULL; p = NULL)
if (++coloff == maxcols) {
ncols = erealloc(cols, (maxcols +
DEFCOLS) * sizeof(*ncols));
nlens = erealloc(lens, (maxcols +
DEFCOLS) * sizeof(*nlens));
cols = ncols;
lens = nlens;
(void)memset(cols + maxcols, 0,
DEFCOLS * sizeof(*cols));
(void)memset(lens + maxcols, 0,
DEFCOLS * sizeof(*lens));
maxcols += DEFCOLS;
}
t->list = ecalloc(coloff, sizeof(*(t->list)));
t->len = ecalloc(coloff, sizeof(*(t->len)));
for (t->cols = coloff; --coloff >= 0;) {
t->list[coloff] = cols[coloff];
t->len[coloff] = strlen(cols[coloff]);
if (t->len[coloff] > lens[coloff])
lens[coloff] = t->len[coloff];
}
}
for (cnt = 0, t = tbl; cnt < entries; ++cnt, ++t) {
for (coloff = 0; coloff < t->cols - 1; ++coloff)
(void)printf("%s%*s", t->list[coloff],
lens[coloff] - t->len[coloff] + 2, " ");
(void)printf("%s\n", t->list[coloff]);
}
free(tbl);
free(cols);
free(lens);
}
#define DEFNUM 1000
static void
input(FILE *fp)
{
static int maxentry;
int len;
size_t blen;
char *p, *buf;
char **n;
if (!list)
list = ecalloc((maxentry = DEFNUM), sizeof(*list));
while ((buf = fgetln(fp, &blen)) != NULL) {
buf = estrndup(buf, blen);
for (p = buf; *p && isspace((unsigned char)*p); ++p);
if (!*p) {
free(buf);
continue;
}
if (!(p = strchr(p, '\n'))) {
warnx("line too long");
eval = 1;
free(buf);
continue;
}
*p = '\0';
len = p - buf;
if (maxlength < len)
maxlength = len;
if (entries == maxentry) {
n = erealloc(list, (maxentry + DEFNUM) * sizeof(*n));
(void)memset(n + maxentry, 0, sizeof(*n) * DEFNUM);
maxentry += DEFNUM;
list = n;
}
list[entries++] = buf;
}
}
static void
usage(void)
{
(void)fprintf(stderr,
"Usage: %s [-tx] [-c columns] [-s sep] [file ...]\n",
getprogname());
exit(1);
}