File: [local] / src / usr.bin / column / column.c (download)
Revision 1.27, Mon Dec 26 19:16:00 2022 UTC (17 months, 2 weeks ago) by jmc
Branch: MAIN
CVS Tags: OPENBSD_7_5_BASE, OPENBSD_7_5, OPENBSD_7_4_BASE, OPENBSD_7_4, OPENBSD_7_3_BASE, OPENBSD_7_3, HEAD Changes since 1.26: +2 -2 lines
spelling fixes; from paul tagliamonte
amendments to his diff are noted on tech
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/* $OpenBSD: column.c,v 1.27 2022/12/26 19:16:00 jmc 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.
*/
#include <sys/types.h>
#include <sys/ioctl.h>
#include <ctype.h>
#include <err.h>
#include <limits.h>
#include <locale.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <wchar.h>
#include <wctype.h>
void c_columnate(void);
void *ereallocarray(void *, size_t, size_t);
void input(FILE *);
void maketbl(void);
void print(void);
void r_columnate(void);
__dead void usage(void);
struct field {
char *content;
int width;
};
int termwidth; /* default terminal width */
int entries; /* number of records */
int eval; /* exit value */
int *maxwidths; /* longest record per column */
struct field **table; /* one array of pointers per line */
wchar_t *separator = L"\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;
setlocale(LC_CTYPE, "");
termwidth = 0;
if ((p = getenv("COLUMNS")) != NULL)
termwidth = strtonum(p, 1, INT_MAX, NULL);
if (termwidth == 0 && ioctl(STDOUT_FILENO, TIOCGWINSZ, &win) == 0 &&
win.ws_col > 0)
termwidth = win.ws_col;
if (termwidth == 0)
termwidth = 80;
if (pledge("stdio rpath", NULL) == -1)
err(1, "pledge");
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':
if ((separator = reallocarray(NULL, strlen(optarg) + 1,
sizeof(*separator))) == NULL)
err(1, NULL);
if (mbstowcs(separator, optarg, strlen(optarg) + 1) ==
(size_t) -1)
err(1, "sep");
break;
case 't':
tflag = 1;
break;
case 'x':
xflag = 1;
break;
default:
usage();
}
}
if (!tflag)
separator = L"";
argv += optind;
if (*argv == NULL) {
input(stdin);
} else {
for (; *argv; ++argv) {
if ((fp = fopen(*argv, "r"))) {
input(fp);
(void)fclose(fp);
} else {
warn("%s", *argv);
eval = 1;
}
}
}
if (pledge("stdio", NULL) == -1)
err(1, "pledge");
if (!entries)
return eval;
if (tflag)
maketbl();
else if (*maxwidths >= termwidth)
print();
else if (xflag)
c_columnate();
else
r_columnate();
return eval;
}
#define INCR_NEXTTAB(x) (x = (x + 8) & ~7)
void
c_columnate(void)
{
int col, numcols;
struct field **row;
INCR_NEXTTAB(*maxwidths);
if ((numcols = termwidth / *maxwidths) == 0)
numcols = 1;
for (col = 0, row = table;; ++row) {
fputs((*row)->content, stdout);
if (!--entries)
break;
if (++col == numcols) {
col = 0;
putchar('\n');
} else {
while (INCR_NEXTTAB((*row)->width) <= *maxwidths)
putchar('\t');
}
}
putchar('\n');
}
void
r_columnate(void)
{
int base, col, numcols, numrows, row;
INCR_NEXTTAB(*maxwidths);
if ((numcols = termwidth / *maxwidths) == 0)
numcols = 1;
numrows = entries / numcols;
if (entries % numcols)
++numrows;
for (base = row = 0; row < numrows; base = ++row) {
for (col = 0; col < numcols; ++col, base += numrows) {
fputs(table[base]->content, stdout);
if (base + numrows >= entries)
break;
while (INCR_NEXTTAB(table[base]->width) <= *maxwidths)
putchar('\t');
}
putchar('\n');
}
}
void
print(void)
{
int row;
for (row = 0; row < entries; row++)
puts(table[row]->content);
}
void
maketbl(void)
{
struct field **row;
int col;
for (row = table; entries--; ++row) {
for (col = 0; (*row)[col + 1].content != NULL; ++col)
printf("%s%*s ", (*row)[col].content,
maxwidths[col] - (*row)[col].width, "");
puts((*row)[col].content);
}
}
#define DEFNUM 1000
#define DEFCOLS 25
void
input(FILE *fp)
{
static int maxentry = 0;
static int maxcols = 0;
static struct field *cols = NULL;
int col, width, twidth;
size_t blen;
ssize_t llen;
char *p, *s, *buf = NULL;
wchar_t wc;
int wlen;
while ((llen = getline(&buf, &blen, fp)) > -1) {
if (buf[llen - 1] == '\n')
buf[llen - 1] = '\0';
p = buf;
for (col = 0;; col++) {
/* Skip lines containing nothing but whitespace. */
for (s = p; (wlen = mbtowc(&wc, s, MB_CUR_MAX)) > 0;
s += wlen)
if (!iswspace(wc))
break;
if (*s == '\0')
break;
/* Skip leading, multiple, and trailing separators. */
while ((wlen = mbtowc(&wc, p, MB_CUR_MAX)) > 0 &&
wcschr(separator, wc) != NULL)
p += wlen;
if (*p == '\0')
break;
/*
* Found a non-empty field.
* Remember the start and measure the width.
*/
s = p;
width = 0;
while (*p != '\0') {
if ((wlen = mbtowc(&wc, p, MB_CUR_MAX)) == -1) {
width++;
p++;
continue;
}
if (wcschr(separator, wc) != NULL)
break;
if (*p == '\t')
INCR_NEXTTAB(width);
else {
width += (twidth = wcwidth(wc)) == -1 ?
1 : twidth;
}
p += wlen;
}
if (col + 1 >= maxcols) {
if (maxcols > INT_MAX - DEFCOLS)
err(1, "too many columns");
maxcols += DEFCOLS;
cols = ereallocarray(cols, maxcols,
sizeof(*cols));
maxwidths = ereallocarray(maxwidths, maxcols,
sizeof(*maxwidths));
memset(maxwidths + col, 0,
DEFCOLS * sizeof(*maxwidths));
}
/*
* Remember the width of the field,
* NUL-terminate and remember the content,
* and advance beyond the separator, if any.
*/
cols[col].width = width;
if (maxwidths[col] < width)
maxwidths[col] = width;
if (*p != '\0') {
*p = '\0';
p += wlen;
}
if ((cols[col].content = strdup(s)) == NULL)
err(1, NULL);
}
if (col == 0)
continue;
/* Found a non-empty line; remember it. */
if (entries == maxentry) {
if (maxentry > INT_MAX - DEFNUM)
errx(1, "too many input lines");
maxentry += DEFNUM;
table = ereallocarray(table, maxentry, sizeof(*table));
}
table[entries] = ereallocarray(NULL, col + 1,
sizeof(*(table[entries])));
table[entries][col].content = NULL;
while (col--)
table[entries][col] = cols[col];
entries++;
}
}
void *
ereallocarray(void *ptr, size_t nmemb, size_t size)
{
if ((ptr = reallocarray(ptr, nmemb, size)) == NULL)
err(1, NULL);
return ptr;
}
__dead void
usage(void)
{
(void)fprintf(stderr,
"usage: column [-tx] [-c columns] [-s sep] [file ...]\n");
exit(1);
}