460 lines
10 KiB
C
460 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;
|
|
|
|
mlbuf = NULL;
|
|
for (sep = dchar; (lbuf = fgetln(fp, &lbuflen)) != NULL;) {
|
|
/* 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;
|
|
}
|
|
output = 0;
|
|
for (isdelim = 0, p = lbuf;; p += clen) {
|
|
clen = mbrtowc(&ch, p, lbuf + lbuflen - 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 + lbuflen - 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);
|
|
}
|