/* $NetBSD: cut.c,v 1.29 2014/02/03 20:22:19 wiz Exp $ */
/*
* 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. 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/cdefs.h>
#ifndef lint
__COPYRIGHT("@(#) Copyright (c) 1989, 1993\
The Regents of the University of California. All rights reserved.");
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)cut.c 8.3 (Berkeley) 5/4/95";
#endif
__RCSID("$NetBSD: cut.c,v 1.29 2014/02/03 20:22:19 wiz Exp $");
#endif /* not lint */
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <limits.h>
#include <locale.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <util.h>
#include <wchar.h>
#include <sys/param.h>
static int bflag;
static int cflag;
static char dchar;
static int dflag;
static int fflag;
static int sflag;
static void b_cut(FILE *, const char *);
static void c_cut(FILE *, const char *);
static void f_cut(FILE *, const char *);
static void get_list(char *);
static void usage(void) __dead;
int
main(int argc, char *argv[])
{
FILE *fp;
void (*fcn)(FILE *, const char *);
int ch, rval;
fcn = NULL;
(void)setlocale(LC_ALL, "");
dchar = '\t'; /* default delimiter is \t */
/* Since we don't support multi-byte characters, the -c and -b
options are equivalent, and the -n option is meaningless. */
while ((ch = getopt(argc, argv, "b:c:d:f:sn")) != -1)
switch(ch) {
case 'b':
fcn = b_cut;
get_list(optarg);
bflag = 1;
break;
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 'n':
break;
case '?':
default:
usage();
}
argc -= optind;
argv += optind;
if (fflag) {
if (cflag || bflag)
usage();
} else if ((!cflag && !bflag) || dflag || sflag)
usage();
else if (bflag && cflag)
usage();
rval = 0;
if (*argv)
for (; *argv; ++argv) {
if (strcmp(*argv, "-") == 0)
fcn(stdin, "stdin");
else {
if ((fp = fopen(*argv, "r"))) {
fcn(fp, *argv);
(void)fclose(fp);
} else {
rval = 1;
warn("%s", *argv);
}
}
}
else
fcn(stdin, "stdin");
return(rval);
}
static size_t autostart, autostop, maxval;
static char *positions = NULL;
static size_t numpositions = 0;
#define ALLOC_CHUNK _POSIX2_LINE_MAX /* malloc granularity */
static void
get_list(char *list)
{
size_t setautostart, start, stop;
char *pos;
char *p;
if (positions == NULL) {
numpositions = ALLOC_CHUNK;
positions = ecalloc(numpositions, sizeof(*positions));
}
/*
* 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 to.
*/
for (; (p = strtok(list, ", \t")) != NULL; list = NULL) {
setautostart = start = stop = 0;
if (*p == '-') {
++p;
setautostart = 1;
}
if (isdigit((unsigned char)*p)) {
start = stop = strtol(p, &p, 10);
if (setautostart && start > autostart)
autostart = start;
}
if (*p == '-') {
if (isdigit((unsigned char)p[1]))
stop = strtol(p + 1, &p, 10);
if (*p == '-') {
++p;
if (!autostop || autostop > stop)
autostop = stop;
}
}
if (*p)
errx(1, "[-bcf] list: illegal list value");
if (!stop || !start)
errx(1, "[-bcf] list: values may not include zero");
if (stop + 1 > numpositions) {
size_t newsize;
newsize = roundup(stop + 1, ALLOC_CHUNK);
positions = erealloc(positions, newsize);
(void)memset(positions + numpositions, 0,
newsize - numpositions);
numpositions = newsize;
}
if (maxval < stop)
maxval = stop;
for (pos = positions + start; start++ <= stop; pos++)
*pos = 1;
}
/* overlapping ranges */
if (autostop && maxval > autostop)
maxval = autostop;
/* set autostart */
if (autostart)
(void)memset(positions + 1, '1', autostart);
}
static void
/*ARGSUSED*/
f_cut(FILE *fp, const char *fname __unused)
{
int ch, field, isdelim;
char *pos, *p, sep;
int output;
size_t len;
char *lbuf, *tbuf;
for (sep = dchar, tbuf = NULL; (lbuf = fgetln(fp, &len)) != NULL;) {
output = 0;
if (lbuf[len - 1] != '\n') {
/* no newline at the end of the last line so add one */
if ((tbuf = (char *)malloc(len + 1)) == NULL)
err(1, NULL);
(void)memcpy(tbuf, lbuf, len);
tbuf[len++] = '\n';
lbuf = tbuf;
}
for (isdelim = 0, p = lbuf;; ++p) {
ch = *p;
/* this should work if newline is delimiter */
if (ch == sep)
isdelim = 1;
if (ch == '\n') {
if (!isdelim && !sflag)
(void)fwrite(lbuf, len, 1, stdout);
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)
continue;
}
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');
if (tbuf) {
free(tbuf);
tbuf = NULL;
}
}
if (tbuf)
free(tbuf);
}
static void
usage(void)
{
(void)fprintf(stderr, "usage:\tcut -b list [-n] [file ...]\n"
"\tcut -c list [file ...]\n"
"\tcut -f list [-d string] [-s] [file ...]\n");
exit(1);
}
/* make b_put(): */
#define CUT_BYTE 1
#include "x_cut.c"
#undef CUT_BYTE
/* make c_put(): */
#define CUT_BYTE 0
#include "x_cut.c"
#undef CUT_BYTE
