blob: f9dfd593854754b0fff40d89bbecfc1b2cd53de5 [file] [log] [blame]
/*
* Copyright (c) 1980 Regents of the University of California.
* All rights reserved.
*
* 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.
*/
/*
* 1999-02-22 Arkadiusz Miśkiewicz <misiek@pld.ORG.PL>
* added Native Language Support
* 1999-09-19 Bruno Haible <haible@clisp.cons.org>
* modified to work correctly in multi-byte locales
*/
#include <stdio.h>
#include <stdlib.h>
#include <getopt.h>
#include <unistd.h>
#include "nls.h"
#include "strutils.h"
#include "c.h"
#include "widechar.h"
#include "closestream.h"
/*
COLRM removes unwanted columns from a file
Jeff Schriebman UC Berkeley 11-74
*/
static void __attribute__((__noreturn__)) usage(void)
{
FILE *out = stdout;
fprintf(out, _("\nUsage:\n"
" %s [startcol [endcol]]\n"),
program_invocation_short_name);
fputs(USAGE_SEPARATOR, out);
fputs(_("Filter out the specified columns.\n"), out);
fputs(USAGE_OPTIONS, out);
printf(USAGE_HELP_OPTIONS(16));
fprintf(out, _("%s reads from standard input and writes to standard output\n\n"),
program_invocation_short_name);
printf(USAGE_MAN_TAIL("colrm(1)"));
exit(EXIT_SUCCESS);
}
static int process_input(unsigned long first, unsigned long last)
{
unsigned long ct = 0;
wint_t c;
unsigned long i;
int w;
int padding;
for (;;) {
c = getwc(stdin);
if (c == WEOF)
return 0;
if (c == '\t')
w = ((ct + 8) & ~7) - ct;
else if (c == '\b')
w = (ct ? ct - 1 : 0) - ct;
else {
w = wcwidth(c);
if (w < 0)
w = 0;
}
ct += w;
if (c == '\n') {
putwc(c, stdout);
ct = 0;
continue;
}
if (!first || ct < first) {
putwc(c, stdout);
continue;
}
break;
}
for (i = ct - w + 1; i < first; i++)
putwc(' ', stdout);
/* Loop getting rid of characters */
while (!last || ct < last) {
c = getwc(stdin);
if (c == WEOF)
return 0;
if (c == '\n') {
putwc(c, stdout);
return 1;
}
if (c == '\t')
ct = (ct + 8) & ~7;
else if (c == '\b')
ct = ct ? ct - 1 : 0;
else {
w = wcwidth(c);
if (w < 0)
w = 0;
ct += w;
}
}
padding = 0;
/* Output last of the line */
for (;;) {
c = getwc(stdin);
if (c == WEOF)
break;
if (c == '\n') {
putwc(c, stdout);
return 1;
}
if (padding == 0 && last < ct) {
for (i = last; i < ct; i++)
putwc(' ', stdout);
padding = 1;
}
putwc(c, stdout);
}
return 0;
}
int main(int argc, char **argv)
{
unsigned long first = 0, last = 0;
int opt;
static const struct option longopts[] = {
{"version", no_argument, NULL, 'V'},
{"help", no_argument, NULL, 'h'},
{NULL, 0, NULL, 0}
};
setlocale(LC_ALL, "");
bindtextdomain(PACKAGE, LOCALEDIR);
textdomain(PACKAGE);
close_stdout_atexit();
while ((opt =
getopt_long(argc, argv, "bfhl:pxVH", longopts,
NULL)) != -1)
switch (opt) {
case 'V':
print_version(EXIT_SUCCESS);
case 'h':
usage();
default:
errtryhelp(EXIT_FAILURE);
}
if (argc > 1)
first = strtoul_or_err(*++argv, _("first argument"));
if (argc > 2)
last = strtoul_or_err(*++argv, _("second argument"));
while (process_input(first, last))
;
fflush(stdout);
return EXIT_SUCCESS;
}