4.3BSD-Reno/src/usr.bin/column/column.c
/*
* Copyright (c) 1989 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that: (1) source distributions retain this entire copyright
* notice and comment, and (2) distributions including binaries display
* the following acknowledgement: ``This product includes software
* developed by the University of California, Berkeley and its contributors''
* in the documentation or other materials provided with the distribution
* and in all advertising materials mentioning features or use of this
* software. 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1989 The Regents of the University of California.\n\
All rights reserved.\n";
#endif /* not lint */
#ifndef lint
static char sccsid[] = "@(#)column.c 5.6 (Berkeley) 6/1/90";
#endif /* not lint */
#include <sys/types.h>
#include <sys/ioctl.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
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 */
main(argc, argv)
int argc;
char **argv;
{
extern char *optarg;
extern int errno, optind;
struct winsize win;
FILE *fp;
int ch, tflag, xflag;
char *p, *getenv();
if (ioctl(1, TIOCGWINSZ, &win) == -1 || !win.ws_col) {
if (p = getenv("COLUMNS"))
termwidth = atoi(p);
} else
termwidth = win.ws_col;
xflag = 0;
while ((ch = getopt(argc, argv, "c:s:tx")) != EOF)
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")) {
input(fp);
(void)fclose(fp);
} else {
(void)fprintf(stderr, "column: %s: %s\n", *argv,
strerror(errno));
eval = 1;
}
if (!entries)
exit(eval);
if (tflag)
maketbl();
else {
if (maxlength >= termwidth)
print();
if (xflag)
c_columnate();
else
r_columnate();
}
exit(eval);
}
#define TAB 8
c_columnate()
{
register int chcnt, col, cnt, numcols;
int endcol;
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');
}
r_columnate()
{
register int base, chcnt, cnt, col;
int endcol, numcols, numrows, row;
maxlength = (maxlength + TAB) & ~(TAB - 1);
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 = (chcnt + TAB & ~(TAB - 1))) <= endcol) {
(void)putchar('\t');
chcnt = cnt;
}
endcol += maxlength;
}
putchar('\n');
}
}
print()
{
register int cnt;
register 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
maketbl()
{
register TBL *t;
register int coloff, cnt;
register char *p, **lp;
int *lens, maxcols;
TBL *tbl;
char **cols, *emalloc(), *realloc();
t = tbl = (TBL *)emalloc(entries * sizeof(TBL));
cols = (char **)emalloc((maxcols = DEFCOLS) * sizeof(char *));
lens = (int *)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) {
if (!(cols = (char **)realloc((char *)cols,
(u_int)maxcols + DEFCOLS * sizeof(char *))) ||
!(lens = (int *)realloc((char *)lens,
(u_int)maxcols + DEFCOLS * sizeof(int))))
nomem();
bzero((char *)lens + maxcols * sizeof(int),
DEFCOLS * sizeof(int));
maxcols += DEFCOLS;
}
t->list = (char **)emalloc(coloff * sizeof(char *));
t->len = (int *)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) {
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 (2048 + 1)
input(fp)
register FILE *fp;
{
static int maxentry;
register int len;
register char *p;
char buf[MAXLINELEN], *emalloc(), *realloc();
if (!list)
list = (char **)emalloc((maxentry = DEFNUM) * sizeof(char *));
while (fgets(buf, MAXLINELEN, fp)) {
for (p = buf; *p && isspace(*p); ++p);
if (!*p)
continue;
if (!(p = index(p, '\n'))) {
(void)fprintf(stderr, "column: line too long.\n");
eval = 1;
continue;
}
*p = '\0';
len = p - buf;
if (maxlength < len)
maxlength = len;
if (entries == maxentry) {
maxentry += DEFNUM;
if (!(list =
(char **)realloc((char *)list,
(u_int)maxentry * sizeof(char *))))
nomem();
}
list[entries++] = strdup(buf);
}
}
char *
emalloc(size)
int size;
{
char *p, *malloc();
/* NOSTRICT */
if (!(p = malloc((u_int)size)))
nomem();
bzero(p, size);
return(p);
}
nomem()
{
(void)fprintf(stderr, "column: out of memory.\n");
exit(1);
}
usage()
{
(void)fprintf(stderr,
"usage: column [-tx] [-c columns] [file ...]\n");
exit(1);
}