299 lines
6.8 KiB
C
299 lines
6.8 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.
|
|
*/
|
|
|
|
#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 */
|
|
|
|
#include <ctype.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 err __P((const char *, ...));
|
|
void f_cut __P((FILE *, char *));
|
|
void get_list __P((char *));
|
|
void usage __P((void));
|
|
|
|
int
|
|
main(argc, argv)
|
|
int argc;
|
|
char *argv[];
|
|
{
|
|
FILE *fp;
|
|
void (*fcn) __P((FILE *, char *));
|
|
int ch;
|
|
|
|
dchar = '\t'; /* default delimiter is \t */
|
|
|
|
while ((ch = getopt(argc, argv, "c:d:f:s")) != EOF)
|
|
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;
|
|
argv += optind;
|
|
|
|
if (fflag) {
|
|
if (cflag)
|
|
usage();
|
|
} else if (!cflag || dflag || sflag)
|
|
usage();
|
|
|
|
if (*argv)
|
|
for (; *argv; ++argv) {
|
|
if (!(fp = fopen(*argv, "r")))
|
|
err("%s: %s\n", *argv, strerror(errno));
|
|
fcn(fp, *argv);
|
|
(void)fclose(fp);
|
|
}
|
|
else
|
|
fcn(stdin, "stdin");
|
|
exit(0);
|
|
}
|
|
|
|
int autostart, autostop, maxval;
|
|
|
|
char positions[_POSIX2_LINE_MAX + 1];
|
|
|
|
void
|
|
get_list(list)
|
|
char *list;
|
|
{
|
|
register int setautostart, start, stop;
|
|
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)
|
|
err("[-cf] list: illegal list value\n");
|
|
if (!stop || !start)
|
|
err("[-cf] list: values may not include zero\n");
|
|
if (stop > _POSIX2_LINE_MAX)
|
|
err("[-cf] list: %d too large (max %d)\n",
|
|
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
|
|
c_cut(fp, fname)
|
|
FILE *fp;
|
|
char *fname;
|
|
{
|
|
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
|
|
f_cut(fp, fname)
|
|
FILE *fp;
|
|
char *fname;
|
|
{
|
|
register int ch, field, isdelim;
|
|
register char *pos, *p, sep;
|
|
int output;
|
|
char lbuf[_POSIX2_LINE_MAX + 1];
|
|
|
|
for (sep = dchar; fgets(lbuf, sizeof(lbuf), fp);) {
|
|
output = 0;
|
|
for (isdelim = 0, p = lbuf;; ++p) {
|
|
if (!(ch = *p))
|
|
err("%s: line too long.\n", 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');
|
|
}
|
|
}
|
|
|
|
void
|
|
usage()
|
|
{
|
|
(void)fprintf(stderr,
|
|
"usage:\tcut -c list [file1 ...]\n\tcut -f list [-s] [-d delim] [file ...]\n");
|
|
exit(1);
|
|
}
|
|
|
|
#if __STDC__
|
|
#include <stdarg.h>
|
|
#else
|
|
#include <varargs.h>
|
|
#endif
|
|
|
|
void
|
|
#if __STDC__
|
|
err(const char *fmt, ...)
|
|
#else
|
|
err(fmt, va_alist)
|
|
char *fmt;
|
|
va_dcl
|
|
#endif
|
|
{
|
|
va_list ap;
|
|
#if __STDC__
|
|
va_start(ap, fmt);
|
|
#else
|
|
va_start(ap);
|
|
#endif
|
|
(void)fprintf(stderr, "cut: ");
|
|
(void)vfprintf(stderr, fmt, ap);
|
|
va_end(ap);
|
|
(void)fprintf(stderr, "\n");
|
|
exit(1);
|
|
/* NOTREACHED */
|
|
}
|