1 /* $OpenBSD: rev.c,v 1.13 2016/04/10 17:06:52 martijn Exp $ */ 2 /* $NetBSD: rev.c,v 1.5 1995/09/28 08:49:40 tls Exp $ */ 3 4 /*- 5 * Copyright (c) 1987, 1992, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 #include <sys/types.h> 34 35 #include <err.h> 36 #include <errno.h> 37 #include <locale.h> 38 #include <stdio.h> 39 #include <stdlib.h> 40 #include <string.h> 41 #include <unistd.h> 42 43 int isu8cont(unsigned char); 44 void usage(void); 45 46 int 47 main(int argc, char *argv[]) 48 { 49 char *filename, *p = NULL, *t, *u; 50 FILE *fp; 51 ssize_t len; 52 size_t ps = 0; 53 int ch, rval; 54 55 setlocale(LC_CTYPE, ""); 56 57 if (pledge("stdio rpath", NULL) == -1) 58 err(1, "pledge"); 59 60 while ((ch = getopt(argc, argv, "")) != -1) 61 switch(ch) { 62 default: 63 usage(); 64 } 65 66 argc -= optind; 67 argv += optind; 68 69 fp = stdin; 70 filename = "stdin"; 71 rval = 0; 72 do { 73 if (*argv) { 74 if ((fp = fopen(*argv, "r")) == NULL) { 75 warn("%s", *argv); 76 rval = 1; 77 ++argv; 78 continue; 79 } 80 filename = *argv++; 81 } 82 while ((len = getline(&p, &ps, fp)) != -1) { 83 if (p[len - 1] == '\n') 84 --len; 85 for (t = p + len - 1; t >= p; --t) { 86 if (isu8cont(*t)) 87 continue; 88 u = t; 89 do { 90 putchar(*u); 91 } while (isu8cont(*(++u))); 92 } 93 putchar('\n'); 94 } 95 if (ferror(fp)) { 96 warn("%s", filename); 97 rval = 1; 98 } 99 (void)fclose(fp); 100 } while(*argv); 101 return rval; 102 } 103 104 int 105 isu8cont(unsigned char c) 106 { 107 return MB_CUR_MAX > 1 && (c & (0x80 | 0x40)) == 0x80; 108 } 109 110 void 111 usage(void) 112 { 113 extern char *__progname; 114 115 (void)fprintf(stderr, "usage: %s [file ...]\n", __progname); 116 exit(1); 117 } 118