0996b6bfc4
length argument to mbrtowc() that accounts for the terminating newline character we add automatically. Failing to do this caused the loop to unexpectedly run out of characters and incorrectly signal an "Illegal byte sequence" error.
462 lines
10 KiB
C
462 lines
10 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 const char copyright[] =
|
|
"@(#) Copyright (c) 1989, 1993\n\
|
|
The Regents of the University of California. All rights reserved.\n";
|
|
static const char sccsid[] = "@(#)cut.c 8.3 (Berkeley) 5/4/95";
|
|
#endif /* not lint */
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#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 <wchar.h>
|
|
|
|
int bflag;
|
|
int cflag;
|
|
wchar_t dchar;
|
|
char dcharmb[MB_LEN_MAX + 1];
|
|
int dflag;
|
|
int fflag;
|
|
int nflag;
|
|
int sflag;
|
|
|
|
size_t autostart, autostop, maxval;
|
|
char * positions;
|
|
|
|
int b_cut(FILE *, const char *);
|
|
int b_n_cut(FILE *, const char *);
|
|
int c_cut(FILE *, const char *);
|
|
int f_cut(FILE *, const char *);
|
|
void get_list(char *);
|
|
void needpos(size_t);
|
|
static void usage(void);
|
|
|
|
int
|
|
main(int argc, char *argv[])
|
|
{
|
|
FILE *fp;
|
|
int (*fcn)(FILE *, const char *);
|
|
int ch, rval;
|
|
size_t n;
|
|
|
|
setlocale(LC_ALL, "");
|
|
|
|
fcn = NULL;
|
|
dchar = '\t'; /* default delimiter is \t */
|
|
strcpy(dcharmb, "\t");
|
|
|
|
while ((ch = getopt(argc, argv, "b:c:d:f:sn")) != -1)
|
|
switch(ch) {
|
|
case 'b':
|
|
get_list(optarg);
|
|
bflag = 1;
|
|
break;
|
|
case 'c':
|
|
get_list(optarg);
|
|
cflag = 1;
|
|
break;
|
|
case 'd':
|
|
n = mbrtowc(&dchar, optarg, MB_LEN_MAX, NULL);
|
|
if (dchar == '\0' || n != strlen(optarg))
|
|
errx(1, "bad delimiter");
|
|
strcpy(dcharmb, optarg);
|
|
dflag = 1;
|
|
break;
|
|
case 'f':
|
|
get_list(optarg);
|
|
fflag = 1;
|
|
break;
|
|
case 's':
|
|
sflag = 1;
|
|
break;
|
|
case 'n':
|
|
nflag = 1;
|
|
break;
|
|
case '?':
|
|
default:
|
|
usage();
|
|
}
|
|
argc -= optind;
|
|
argv += optind;
|
|
|
|
if (fflag) {
|
|
if (bflag || cflag || nflag)
|
|
usage();
|
|
} else if (!(bflag || cflag) || dflag || sflag)
|
|
usage();
|
|
else if (!bflag && nflag)
|
|
usage();
|
|
|
|
if (fflag)
|
|
fcn = f_cut;
|
|
else if (cflag)
|
|
fcn = MB_CUR_MAX > 1 ? c_cut : b_cut;
|
|
else if (bflag)
|
|
fcn = nflag && MB_CUR_MAX > 1 ? b_n_cut : b_cut;
|
|
|
|
rval = 0;
|
|
if (*argv)
|
|
for (; *argv; ++argv) {
|
|
if (strcmp(*argv, "-") == 0)
|
|
rval |= fcn(stdin, "stdin");
|
|
else {
|
|
if (!(fp = fopen(*argv, "r"))) {
|
|
warn("%s", *argv);
|
|
rval = 1;
|
|
continue;
|
|
}
|
|
fcn(fp, *argv);
|
|
(void)fclose(fp);
|
|
}
|
|
}
|
|
else
|
|
rval = fcn(stdin, "stdin");
|
|
exit(rval);
|
|
}
|
|
|
|
void
|
|
get_list(char *list)
|
|
{
|
|
size_t setautostart, start, stop;
|
|
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.
|
|
* Numbers and number ranges may be overlapping, repeated, and in
|
|
* any order. We handle "-3-5" although there's no real reason too.
|
|
*/
|
|
for (; (p = strsep(&list, ", \t")) != 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, "[-cf] list: illegal list value");
|
|
if (!stop || !start)
|
|
errx(1, "[-cf] list: values may not include zero");
|
|
if (maxval < stop) {
|
|
maxval = stop;
|
|
needpos(maxval + 1);
|
|
}
|
|
for (pos = positions + start; start++ <= stop; *pos++ = 1);
|
|
}
|
|
|
|
/* overlapping ranges */
|
|
if (autostop && maxval > autostop) {
|
|
maxval = autostop;
|
|
needpos(maxval + 1);
|
|
}
|
|
|
|
/* set autostart */
|
|
if (autostart)
|
|
memset(positions + 1, '1', autostart);
|
|
}
|
|
|
|
void
|
|
needpos(size_t n)
|
|
{
|
|
static size_t npos;
|
|
size_t oldnpos;
|
|
|
|
/* Grow the positions array to at least the specified size. */
|
|
if (n > npos) {
|
|
oldnpos = npos;
|
|
if (npos == 0)
|
|
npos = n;
|
|
while (n > npos)
|
|
npos *= 2;
|
|
if ((positions = realloc(positions, npos)) == NULL)
|
|
err(1, "realloc");
|
|
memset((char *)positions + oldnpos, 0, npos - oldnpos);
|
|
}
|
|
}
|
|
|
|
int
|
|
b_cut(FILE *fp, const char *fname __unused)
|
|
{
|
|
int ch, col;
|
|
char *pos;
|
|
|
|
ch = 0;
|
|
for (;;) {
|
|
pos = positions + 1;
|
|
for (col = maxval; col; --col) {
|
|
if ((ch = getc(fp)) == EOF)
|
|
return (0);
|
|
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');
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Cut based on byte positions, taking care not to split multibyte characters.
|
|
* Although this function also handles the case where -n is not specified,
|
|
* b_cut() ought to be much faster.
|
|
*/
|
|
int
|
|
b_n_cut(FILE *fp, const char *fname)
|
|
{
|
|
size_t col, i, lbuflen;
|
|
char *lbuf;
|
|
int canwrite, clen, warned;
|
|
mbstate_t mbs;
|
|
|
|
memset(&mbs, 0, sizeof(mbs));
|
|
warned = 0;
|
|
while ((lbuf = fgetln(fp, &lbuflen)) != NULL) {
|
|
for (col = 0; lbuflen > 0; col += clen) {
|
|
if ((clen = mbrlen(lbuf, lbuflen, &mbs)) < 0) {
|
|
if (!warned) {
|
|
warn("%s", fname);
|
|
warned = 1;
|
|
}
|
|
memset(&mbs, 0, sizeof(mbs));
|
|
clen = 1;
|
|
}
|
|
if (clen == 0 || *lbuf == '\n')
|
|
break;
|
|
if (col < maxval && !positions[1 + col]) {
|
|
/*
|
|
* Print the character if (1) after an initial
|
|
* segment of un-selected bytes, the rest of
|
|
* it is selected, and (2) the last byte is
|
|
* selected.
|
|
*/
|
|
i = col;
|
|
while (i < col + clen && i < maxval &&
|
|
!positions[1 + i])
|
|
i++;
|
|
canwrite = i < col + clen;
|
|
for (; i < col + clen && i < maxval; i++)
|
|
canwrite &= positions[1 + i];
|
|
if (canwrite)
|
|
fwrite(lbuf, 1, clen, stdout);
|
|
} else {
|
|
/*
|
|
* Print the character if all of it has
|
|
* been selected.
|
|
*/
|
|
canwrite = 1;
|
|
for (i = col; i < col + clen; i++)
|
|
if ((i >= maxval && !autostop) ||
|
|
(i < maxval && !positions[1 + i])) {
|
|
canwrite = 0;
|
|
break;
|
|
}
|
|
if (canwrite)
|
|
fwrite(lbuf, 1, clen, stdout);
|
|
}
|
|
lbuf += clen;
|
|
lbuflen -= clen;
|
|
}
|
|
if (lbuflen > 0)
|
|
putchar('\n');
|
|
}
|
|
return (warned);
|
|
}
|
|
|
|
int
|
|
c_cut(FILE *fp, const char *fname)
|
|
{
|
|
wint_t ch;
|
|
int col;
|
|
char *pos;
|
|
|
|
ch = 0;
|
|
for (;;) {
|
|
pos = positions + 1;
|
|
for (col = maxval; col; --col) {
|
|
if ((ch = getwc(fp)) == WEOF)
|
|
goto out;
|
|
if (ch == '\n')
|
|
break;
|
|
if (*pos++)
|
|
(void)putwchar(ch);
|
|
}
|
|
if (ch != '\n') {
|
|
if (autostop)
|
|
while ((ch = getwc(fp)) != WEOF && ch != '\n')
|
|
(void)putwchar(ch);
|
|
else
|
|
while ((ch = getwc(fp)) != WEOF && ch != '\n');
|
|
}
|
|
(void)putwchar('\n');
|
|
}
|
|
out:
|
|
if (ferror(fp)) {
|
|
warn("%s", fname);
|
|
return (1);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
f_cut(FILE *fp, const char *fname)
|
|
{
|
|
wchar_t ch;
|
|
int field, i, isdelim;
|
|
char *pos, *p;
|
|
wchar_t sep;
|
|
int output;
|
|
char *lbuf, *mlbuf;
|
|
size_t clen, lbuflen, reallen;
|
|
|
|
mlbuf = NULL;
|
|
for (sep = dchar; (lbuf = fgetln(fp, &lbuflen)) != NULL;) {
|
|
reallen = lbuflen;
|
|
/* Assert EOL has a newline. */
|
|
if (*(lbuf + lbuflen - 1) != '\n') {
|
|
/* Can't have > 1 line with no trailing newline. */
|
|
mlbuf = malloc(lbuflen + 1);
|
|
if (mlbuf == NULL)
|
|
err(1, "malloc");
|
|
memcpy(mlbuf, lbuf, lbuflen);
|
|
*(mlbuf + lbuflen) = '\n';
|
|
lbuf = mlbuf;
|
|
reallen++;
|
|
}
|
|
output = 0;
|
|
for (isdelim = 0, p = lbuf;; p += clen) {
|
|
clen = mbrtowc(&ch, p, lbuf + reallen - p, NULL);
|
|
if (clen == (size_t)-1 || clen == (size_t)-2) {
|
|
warnc(EILSEQ, "%s", fname);
|
|
free(mlbuf);
|
|
return (1);
|
|
}
|
|
if (clen == 0)
|
|
clen = 1;
|
|
/* this should work if newline is delimiter */
|
|
if (ch == sep)
|
|
isdelim = 1;
|
|
if (ch == '\n') {
|
|
if (!isdelim && !sflag)
|
|
(void)fwrite(lbuf, lbuflen, 1, stdout);
|
|
break;
|
|
}
|
|
}
|
|
if (!isdelim)
|
|
continue;
|
|
|
|
pos = positions + 1;
|
|
for (field = maxval, p = lbuf; field; --field, ++pos) {
|
|
if (*pos && output++)
|
|
for (i = 0; dcharmb[i] != '\0'; i++)
|
|
putchar(dcharmb[i]);
|
|
for (;;) {
|
|
clen = mbrtowc(&ch, p, lbuf + reallen - p,
|
|
NULL);
|
|
if (clen == (size_t)-1 || clen == (size_t)-2) {
|
|
warnc(EILSEQ, "%s", fname);
|
|
free(mlbuf);
|
|
return (1);
|
|
}
|
|
if (clen == 0)
|
|
clen = 1;
|
|
p += clen;
|
|
if (ch == '\n' || ch == sep)
|
|
break;
|
|
if (*pos)
|
|
for (i = 0; i < (int)clen; i++)
|
|
putchar(p[i - clen]);
|
|
}
|
|
if (ch == '\n')
|
|
break;
|
|
}
|
|
if (ch != '\n') {
|
|
if (autostop) {
|
|
if (output)
|
|
for (i = 0; dcharmb[i] != '\0'; i++)
|
|
putchar(dcharmb[i]);
|
|
for (; (ch = *p) != '\n'; ++p)
|
|
(void)putchar(ch);
|
|
} else
|
|
for (; (ch = *p) != '\n'; ++p);
|
|
}
|
|
(void)putchar('\n');
|
|
}
|
|
free(mlbuf);
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
usage(void)
|
|
{
|
|
(void)fprintf(stderr, "%s\n%s\n%s\n",
|
|
"usage: cut -b list [-n] [file ...]",
|
|
" cut -c list [file ...]",
|
|
" cut -f list [-s] [-d delim] [file ...]");
|
|
exit(1);
|
|
}
|