96 lines
1.8 KiB
C
96 lines
1.8 KiB
C
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/* xcase - change uppercase characters to lowercase or vice versa. */
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/* Copyright (C) 2008,2009 Free Software Foundation, Inc.
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This file is part of GNU Bash.
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Bash is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Bash is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Bash. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <stdio.h>
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#include <ctype.h>
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#if HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include "bashansi.h"
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#include <errno.h>
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#ifndef errno
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extern int errno;
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#endif
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#define LOWER 1
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#define UPPER 2
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main(ac, av)
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int ac;
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char **av;
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{
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int c, x;
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int op;
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FILE *inf;
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op = 0;
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while ((c = getopt(ac, av, "lnu")) != EOF) {
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switch (c) {
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case 'n':
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setbuf (stdout, (char *)NULL);
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break;
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case 'u':
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op = UPPER;
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break;
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case 'l':
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op = LOWER;
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break;
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default:
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fprintf(stderr, "casemod: usage: casemod [-lnu] [file]\n");
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exit(2);
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}
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}
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av += optind;
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ac -= optind;
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if (av[0] && (av[0][0] != '-' || av[0][1])) {
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inf = fopen(av[0], "r");
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if (inf == 0) {
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fprintf(stderr, "casemod: %s: cannot open: %s\n", av[0], strerror(errno));
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exit(1);
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}
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} else
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inf = stdin;
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while ((c = getc(inf)) != EOF) {
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switch (op) {
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case UPPER:
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x = islower(c) ? toupper(c) : c;
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break;
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case LOWER:
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x = isupper(c) ? tolower(c) : c;
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break;
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default:
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x = c;
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break;
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}
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putchar(x);
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}
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exit(0);
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}
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