OpenBSD-4.6/usr.bin/column/column.c
/* $OpenBSD: column.c,v 1.14 2007/08/01 13:30:21 millert Exp $ */
/* $NetBSD: column.c,v 1.4 1995/09/02 05:53:03 jtc 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.
*/
#ifndef lint
static char copyright[] =
"@(#) Copyright (c) 1989, 1993, 1994\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)column.c 8.4 (Berkeley) 5/4/95";
#endif
static char rcsid[] = "$OpenBSD: column.c,v 1.14 2007/08/01 13:30:21 millert Exp $";
#endif /* not lint */
#include <sys/types.h>
#include <sys/ioctl.h>
#include <ctype.h>
#include <err.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
void c_columnate(void);
void *emalloc(size_t);
void *erealloc(void *, size_t);
void input(FILE *);
void maketbl(void);
void print(void);
void r_columnate(void);
void usage(void);
int termwidth = 80; /* default terminal width */
int entries; /* number of records */
int eval; /* exit value */
int maxlength; /* longest record */
char **list; /* array of pointers to records */
char *separator = "\t "; /* field separator for table option */
int
main(int argc, char *argv[])
{
struct winsize win;
FILE *fp;
int ch, tflag, xflag;
char *p;
const char *errstr;
if (ioctl(1, TIOCGWINSZ, &win) == -1 || !win.ws_col) {
if ((p = getenv("COLUMNS")) && *p != '\0') {
termwidth = strtonum(p, 1, INT_MAX, &errstr);
if (errstr != NULL)
errx(1, "%s: %s", errstr, p);
}
} else
termwidth = win.ws_col;
tflag = xflag = 0;
while ((ch = getopt(argc, argv, "c:s:tx")) != -1)
switch(ch) {
case 'c':
termwidth = strtonum(optarg, 1, INT_MAX, &errstr);
if (errstr != NULL)
errx(1, "%s: %s", errstr, 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"))) {
input(fp);
(void)fclose(fp);
} else {
warn("%s", *argv);
eval = 1;
}
if (!entries)
exit(eval);
if (tflag)
maketbl();
else if (maxlength >= termwidth)
print();
else if (xflag)
c_columnate();
else
r_columnate();
exit(eval);
}
#define TAB 8
void
c_columnate(void)
{
int chcnt, col, cnt, endcol, numcols;
char **lp;
maxlength = (maxlength + TAB) & ~(TAB - 1);
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;
putchar('\n');
} else {
while ((cnt = ((chcnt + TAB) & ~(TAB - 1))) <= endcol) {
(void)putchar('\t');
chcnt = cnt;
}
endcol += maxlength;
}
}
if (chcnt)
putchar('\n');
}
void
r_columnate(void)
{
int base, chcnt, cnt, col, endcol, numcols, numrows, row;
maxlength = (maxlength + TAB) & ~(TAB - 1);
numcols = termwidth / maxlength;
if (numcols == 0)
numcols = 1;
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 = ((chcnt + TAB) & ~(TAB - 1))) <= endcol) {
(void)putchar('\t');
chcnt = cnt;
}
endcol += maxlength;
}
putchar('\n');
}
}
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
void
maketbl(void)
{
TBL *t;
int coloff, cnt;
char *p, **lp;
int *lens, maxcols;
TBL *tbl;
char **cols;
t = tbl = emalloc(entries * sizeof(TBL));
cols = emalloc((maxcols = DEFCOLS) * sizeof(char *));
lens = emalloc(maxcols * sizeof(int));
for (cnt = 0, lp = list; cnt < entries; ++cnt, ++lp, ++t) {
for (coloff = 0, p = *lp; (cols[coloff] = strtok(p, separator));
p = NULL)
if (++coloff == maxcols) {
maxcols += DEFCOLS;
cols = erealloc(cols, maxcols * sizeof(char *));
lens = erealloc(lens, maxcols * sizeof(int));
memset(lens + coloff, 0, DEFCOLS * sizeof(int));
}
if (coloff == 0)
continue;
t->list = emalloc(coloff * sizeof(char *));
t->len = emalloc(coloff * sizeof(int));
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) {
if (t->cols > 0) {
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]);
}
}
}
#define DEFNUM 1000
#define MAXLINELEN (LINE_MAX + 1)
void
input(FILE *fp)
{
static size_t maxentry;
int len;
char *p, buf[MAXLINELEN];
if (!list)
list = emalloc((maxentry = DEFNUM) * sizeof(char *));
while (fgets(buf, MAXLINELEN, fp)) {
for (p = buf; isspace(*p); ++p);
if (!*p)
continue;
if (!(p = strchr(p, '\n'))) {
warnx("line too long");
eval = 1;
continue;
}
*p = '\0';
len = p - buf;
if (maxlength < len)
maxlength = len;
if (entries == maxentry) {
maxentry += DEFNUM;
list = erealloc(list, maxentry * sizeof(char *));
}
if (!(list[entries++] = strdup(buf)))
err(1, NULL);
}
}
void *
emalloc(size_t size)
{
void *p;
if (!(p = malloc(size)))
err(1, NULL);
memset(p, 0, size);
return (p);
}
void *
erealloc(void *oldp, size_t size)
{
void *p;
if (!(p = realloc(oldp, size)))
err(1, NULL);
return (p);
}
void
usage(void)
{
(void)fprintf(stderr,
"usage: column [-tx] [-c columns] [-s sep] [file ...]\n");
exit(1);
}