gno/usr.bin/cut/cut.c
1997-10-03 04:07:20 +00:00

341 lines
7.8 KiB
C

/*
* Copyright (c) 1989, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Adam S. Moskowitz of Menlo Consulting and Marciano Pitargue.
*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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.
*/
/*
* Modified for GNO (Apple IIGS) by Dave Tribby, August 1997
*
* Constructs unacceptable to compiler are replaced using #ifndef __ORCAC__
*
* Changes not related to compiler are replaced using #ifndef __GNO__
*
* Added prototyped headers, surrounded by #ifndef __STDC__
*
* $Id: cut.c,v 1.3 1997/10/03 04:07:20 gdr Exp $
*/
#ifndef __GNO__ /* GNO doesn't use what strings */
#ifndef lint
static char copyright[] =
"@(#) Copyright (c) 1989, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
static char sccsid[] = "@(#)cut.c 8.3 (Berkeley) 5/4/95";
#endif /* not lint */
#endif
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
int cflag;
char dchar;
int dflag;
int fflag;
int sflag;
void c_cut __P((FILE *, char *));
void f_cut __P((FILE *, char *));
void get_list __P((char *));
static void usage __P((void));
/* Interface to check on how much stack space a C program uses. */
#if defined(__GNO__) && defined(__STACK_CHECK__)
#ifndef _GNO_GNO_H_
#include <gno/gno.h>
#endif
static void report_stack(void)
{
fprintf(stderr,"\n ==> %d stack bytes used <== \n", _endStackCheck());
}
#endif
int
#ifndef __STDC__
main(argc, argv)
int argc;
char *argv[];
#else
main(int argc,
char *argv[])
#endif
{
FILE *fp;
void (*fcn) __P((FILE *, char *));
int ch;
#if defined(__GNO__) && defined(__STACK_CHECK__)
_beginStackCheck();
atexit(report_stack);
#endif
dchar = '\t'; /* default delimiter is \t */
while ((ch = getopt(argc, argv, "c:d:f:s")) != -1)
switch(ch) {
case 'c':
fcn = c_cut;
get_list(optarg);
cflag = 1;
break;
case 'd':
dchar = *optarg;
dflag = 1;
break;
case 'f':
get_list(optarg);
fcn = f_cut;
fflag = 1;
break;
case 's':
sflag = 1;
break;
case '?':
default:
usage();
}
argc -= optind;
#ifndef __ORCAC__
argv += optind;
#else
argv = argv + optind;
#endif
if (fflag) {
if (cflag)
usage();
} else if (!cflag || dflag || sflag)
usage();
if (*argv)
for (; *argv; ++argv) {
if (!(fp = fopen(*argv, "r")))
err(1, "%s", *argv);
fcn(fp, *argv);
(void)fclose(fp);
}
else
fcn(stdin, "stdin");
exit(0);
}
int autostart, autostop, maxval;
char positions[_POSIX2_LINE_MAX + 1];
void
#ifndef __STDC__
get_list(list)
char *list;
#else
get_list(char *list)
#endif
{
#ifndef __GNO__
register int setautostart, start, stop;
#else /* GNO's ints are short; start & stop must be long to catch errors */
long setautostart, start, stop;
#endif
register char *pos;
char *p;
/*
* set a byte in the positions array to indicate if a field or
* column is to be selected; use +1, it's 1-based, not 0-based.
* This parser is less restrictive than the Draft 9 POSIX spec.
* POSIX doesn't allow lists that aren't in increasing order or
* overlapping lists. We also handle "-3-5" although there's no
* real reason too.
*/
for (; p = strtok(list, ", \t"); list = NULL) {
setautostart = start = stop = 0;
if (*p == '-') {
++p;
setautostart = 1;
}
if (isdigit(*p)) {
start = stop = strtol(p, &p, 10);
if (setautostart && start > autostart)
autostart = start;
}
if (*p == '-') {
if (isdigit(p[1]))
stop = strtol(p + 1, &p, 10);
if (*p == '-') {
++p;
if (!autostop || autostop > stop)
autostop = stop;
}
}
if (*p)
errx(1, "[-cf] list: illegal list value");
if (!stop || !start)
errx(1, "[-cf] list: values may not include zero");
if (stop > _POSIX2_LINE_MAX)
#ifndef __GNO__
errx(1, "[-cf] list: %d too large (max %d)",
#else
errx(1, "[-cf] list: %ld too large (max %d)",
#endif
stop, _POSIX2_LINE_MAX);
if (maxval < stop)
maxval = stop;
for (pos = positions + start; start++ <= stop; *pos++ = 1);
}
/* overlapping ranges */
if (autostop && maxval > autostop)
maxval = autostop;
/* set autostart */
if (autostart)
memset(positions + 1, '1', autostart);
}
/* ARGSUSED */
void
#ifndef __STDC__
c_cut(fp, fname)
FILE *fp;
char *fname;
#else
c_cut( FILE *fp,
char *fname)
#endif
{
register int ch, col;
register char *pos;
for (;;) {
pos = positions + 1;
for (col = maxval; col; --col) {
if ((ch = getc(fp)) == EOF)
return;
if (ch == '\n')
break;
if (*pos++)
(void)putchar(ch);
}
if (ch != '\n')
if (autostop)
while ((ch = getc(fp)) != EOF && ch != '\n')
(void)putchar(ch);
else
while ((ch = getc(fp)) != EOF && ch != '\n');
(void)putchar('\n');
}
}
void
#ifndef __STDC__
f_cut(fp, fname)
FILE *fp;
char *fname;
#else
f_cut( FILE *fp,
char *fname)
#endif
{
register int ch, field, isdelim;
register char *pos, *p, sep;
int output;
#ifndef __GNO__
char lbuf[_POSIX2_LINE_MAX + 1];
#else
static char lbuf[_POSIX2_LINE_MAX + 1];
#endif
for (sep = dchar; fgets(lbuf, sizeof(lbuf), fp);) {
output = 0;
for (isdelim = 0, p = lbuf;; ++p) {
if (!(ch = *p))
errx(1, "%s: line too long", fname);
/* this should work if newline is delimiter */
if (ch == sep)
isdelim = 1;
if (ch == '\n') {
if (!isdelim && !sflag)
(void)printf("%s", lbuf);
break;
}
}
if (!isdelim)
continue;
pos = positions + 1;
for (field = maxval, p = lbuf; field; --field, ++pos) {
if (*pos) {
if (output++)
(void)putchar(sep);
while ((ch = *p++) != '\n' && ch != sep)
(void)putchar(ch);
} else
while ((ch = *p++) != '\n' && ch != sep);
if (ch == '\n')
break;
}
if (ch != '\n')
if (autostop) {
if (output)
(void)putchar(sep);
for (; (ch = *p) != '\n'; ++p)
(void)putchar(ch);
} else
for (; (ch = *p) != '\n'; ++p);
(void)putchar('\n');
}
}
static void
#ifndef __STDC__
usage()
#else
usage(void)
#endif
{
(void)fprintf(stderr, "%s\n%s\n",
"usage: cut -c list [file1 ...]",
" cut -f list [-s] [-d delim] [file ...]");
exit(1);
}