| /* |
| * 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 MiĆkiewicz <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); |
| atexit(close_stdout); |
| |
| while ((opt = |
| getopt_long(argc, argv, "bfhl:pxVH", longopts, |
| NULL)) != -1) |
| switch (opt) { |
| case 'V': |
| printf(UTIL_LINUX_VERSION); |
| return 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; |
| } |