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Diffstat (limited to '')
| -rw-r--r-- | text-utils/colrm.c | 194 |
1 files changed, 194 insertions, 0 deletions
diff --git a/text-utils/colrm.c b/text-utils/colrm.c new file mode 100644 index 0000000..8bb0ee9 --- /dev/null +++ b/text-utils/colrm.c @@ -0,0 +1,194 @@ +/* + * 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); + 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; +} |