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/*-
* Copyright (c) 1987, 1992 The 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.
*
* Modified for Linux by Charles Hannum (mycroft@gnu.ai.mit.edu)
* and Brian Koehmstedt (bpk@gnu.ai.mit.edu)
*
* Wed Sep 14 22:26:00 1994: Patch from bjdouma <bjdouma@xs4all.nl> to handle
* last line that has no newline correctly.
* 3-Jun-1998: Patched by Nicolai Langfeldt to work better on Linux:
* Handle any-length-lines. Code copied from util-linux' setpwnam.c
* 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
* July 2010 - Davidlohr Bueso <dave@gnu.org>
* Fixed memory leaks (including Linux signal handling)
* Added some memory allocation error handling
* Lowered the default buffer size to 256, instead of 512 bytes
* Changed tab indentation to 8 chars for better reading the code
*/
#include <stdarg.h>
#include <sys/types.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <signal.h>
#include <getopt.h>
#include "nls.h"
#include "xalloc.h"
#include "widechar.h"
#include "c.h"
#include "closestream.h"
static void sig_handler(int signo __attribute__ ((__unused__)))
{
_exit(EXIT_SUCCESS);
}
static void __attribute__((__noreturn__)) usage(void)
{
FILE *out = stdout;
fprintf(out, _("Usage: %s [options] [file ...]\n"),
program_invocation_short_name);
fputs(USAGE_SEPARATOR, out);
fputs(_("Reverse lines characterwise.\n"), out);
fputs(USAGE_OPTIONS, out);
printf(USAGE_HELP_OPTIONS(16));
printf(USAGE_MAN_TAIL("rev(1)"));
exit(EXIT_SUCCESS);
}
static void reverse_str(wchar_t *str, size_t n)
{
size_t i;
for (i = 0; i < n / 2; ++i) {
wchar_t tmp = str[i];
str[i] = str[n - 1 - i];
str[n - 1 - i] = tmp;
}
}
static size_t read_line(wchar_t sep, wchar_t *str, size_t n, FILE *stream)
{
size_t r = 0;
while (r < n) {
wint_t c = fgetwc(stream);
if (c == WEOF)
break;
str[r++] = c;
if ((wchar_t) c == sep)
break;
}
return r;
}
static void write_line(wchar_t *str, size_t n, FILE *stream)
{
for (size_t i = 0; i < n; i++)
fputwc(str[i], stream);
}
int main(int argc, char *argv[])
{
char const *filename = "stdin";
wchar_t *buf;
wchar_t sep = L'\n';
size_t len, bufsiz = BUFSIZ;
FILE *fp = stdin;
int ch, rval = EXIT_SUCCESS;
uintmax_t line;
static const struct option longopts[] = {
{ "zero", no_argument, NULL, '0' },
{ "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();
signal(SIGINT, sig_handler);
signal(SIGTERM, sig_handler);
while ((ch = getopt_long(argc, argv, "Vh0", longopts, NULL)) != -1)
switch(ch) {
case '0':
sep = L'\0';
break;
case 'V':
print_version(EXIT_SUCCESS);
case 'h':
usage();
default:
errtryhelp(EXIT_FAILURE);
}
argc -= optind;
argv += optind;
buf = xmalloc(bufsiz * sizeof(wchar_t));
do {
if (*argv) {
if ((fp = fopen(*argv, "r")) == NULL) {
warn(_("cannot open %s"), *argv );
rval = EXIT_FAILURE;
++argv;
continue;
}
filename = *argv++;
}
line = 0;
while (!feof(fp)) {
len = read_line(sep, buf, bufsiz, fp);
if (len == 0)
continue;
/* This is my hack from setpwnam.c -janl */
while (len == bufsiz && !feof(fp)) {
/* Extend input buffer if it failed getting the whole line */
/* So now we double the buffer size */
bufsiz *= 2;
buf = xrealloc(buf, bufsiz * sizeof(wchar_t));
/* And fill the rest of the buffer */
len += read_line(sep, &buf[len], bufsiz/2, fp);
}
reverse_str(buf, buf[len - 1] == sep ? len - 1 : len);
write_line(buf, len, stdout);
line++;
}
if (ferror(fp)) {
warn("%s: %ju", filename, line);
rval = EXIT_FAILURE;
}
if (fp != stdin)
fclose(fp);
} while(*argv);
free(buf);
return rval;
}
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