tabs.c revision 1.1
1 /* $NetBSD: tabs.c,v 1.1 2008/12/11 11:18:35 roy Exp $ */ 2 3 /*- 4 * Copyright (c) 2008 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Roy Marples. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #ifndef lint 34 __COPYRIGHT("@(#) Copyright (c) 2008 \ 35 The NetBSD Foundation, inc. All rights reserved."); 36 __RCSID("$NetBSD: tabs.c,v 1.1 2008/12/11 11:18:35 roy Exp $"); 37 #endif /* not lint */ 38 39 #include <sys/ioctl.h> 40 #include <sys/types.h> 41 42 #include <ctype.h> 43 #include <err.h> 44 #include <errno.h> 45 #include <stdio.h> 46 #include <stdlib.h> 47 #include <string.h> 48 #include <termcap.h> 49 #include <unistd.h> 50 51 #define NSTOPS 20 52 53 struct tabspec { 54 const char *opt; 55 const char *spec; 56 }; 57 static const struct tabspec tabspecs[] = { 58 {"a", "1,10,16,36,72"}, 59 {"a2", "1,10,16,40,72"}, 60 {"c", "1,8,12,16,20,55"}, 61 {"c2", "1,6,10,14,49"}, 62 {"c3", "1,6,10,14,18,22,26,30,34,38,42,46,50,54,58,62,67"}, 63 {"f", "1,7,11,15,19,23"}, 64 {"p", "1,5,9,13,17,21,25,29,33,37,41,45,49,53,57,61"}, 65 {"s", "1,10,55"}, 66 {"u", "1,12,20,44"} 67 }; 68 static const size_t ntabspecs = sizeof(tabspecs) / sizeof(tabspecs[0]); 69 70 static char tbuf[2048]; 71 72 static void 73 usage(void) 74 { 75 fprintf(stderr, 76 "usage: tabs [-n|-a|-a2|-c|-c2|-c3|-f|-p|-s|-u] [+m[n]]" 77 " [-T type]\n" 78 " tabs [-T type] [+[n]] n1[,n2,...]\n"); 79 exit(EXIT_FAILURE); 80 /* NOTREACHED */ 81 } 82 83 int 84 main(int argc, char **argv) 85 { 86 char *term, *arg, *tbp, *token, *end, *tabs = NULL, *p; 87 const char *cr, *ct, *st, *ML, *spec = NULL; 88 int i, j, n, inc = 8, stops[NSTOPS], nstops, last, cols, margin = 0; 89 struct winsize ws; 90 91 term = getenv("TERM"); 92 for (i = 1; i < argc; i++) { 93 if (argv[i][0] == '+') { 94 arg = argv[i] + 1; 95 if (arg[0] == 'm') 96 arg++; 97 if (arg[0] == '\0') 98 margin = 10; 99 else { 100 errno = 0; 101 margin = strtol(arg, &end, 10); 102 if (errno != 0 || *end != '\0' || margin < 0) 103 errx(EXIT_FAILURE, 104 "%s: invalid margin", arg); 105 } 106 continue; 107 } 108 if (argv[i][0] != '-') { 109 tabs = argv[i]; 110 break; 111 } 112 arg = argv[i] + 1; 113 if (arg[0] == '\0') 114 usage(); 115 if (arg[0] == '-' && arg[1] == '\0') { 116 if (argv[i + 1] != '\0') 117 tabs = argv[i + 1]; 118 break; 119 } 120 if (arg[0] == 'T' && arg[1] == '\0') { 121 term = argv[++i]; 122 if (term == NULL) 123 usage(); 124 continue; 125 } 126 if (isdigit((int)arg[0])) { 127 if (arg[1] != '\0') 128 errx(EXIT_FAILURE, 129 "%s: invalid increament", arg); 130 inc = arg[0] - '0'; 131 continue; 132 } 133 for (j = 0; j < ntabspecs; j++) { 134 if (arg[0] == tabspecs[j].opt[0] && 135 arg[1] == tabspecs[j].opt[1]) 136 { 137 spec = tabspecs[j].spec; 138 break; 139 } 140 } 141 if (j == ntabspecs) 142 usage(); 143 } 144 if (tabs == NULL && spec != NULL) 145 tabs = strdup(spec); 146 147 if (tabs != NULL) 148 last = nstops = 0; 149 else 150 nstops = -1; 151 p = tabs; 152 while ((token = strsep(&p, ", ")) != NULL) { 153 if (*token == '\0') 154 continue; 155 if (nstops >= NSTOPS) 156 errx(EXIT_FAILURE, 157 "too many tab stops (max %d)", NSTOPS); 158 errno = 0; 159 n = strtol(token, &end, 10); 160 if (errno != 0 || *end != '\0' || n <= 0) 161 errx(EXIT_FAILURE, "%s: invalid tab stop", token); 162 if (*token == '+') { 163 if (nstops == 0) 164 errx(EXIT_FAILURE, 165 "first tab stop may not be relative"); 166 n += last; 167 } 168 if (last > n) 169 errx(EXIT_FAILURE, "tab stops may not go backwards"); 170 last = stops[nstops++] = n; 171 } 172 173 if (term == NULL) 174 errx(EXIT_FAILURE, "no value for $TERM and -T not given"); 175 switch (tgetent(tbuf, term)) { 176 case -1: 177 err(EXIT_FAILURE, "termcap database"); 178 case 0: 179 errx(EXIT_FAILURE, "%s: no termcap entry", term); 180 } 181 tbp = tbuf; 182 cr = tgetstr("cr", &tbp); 183 if (cr == NULL) 184 cr = "\r"; 185 ct = tgetstr("ct", &tbp); 186 if (ct == NULL) 187 errx(EXIT_FAILURE, "terminal cannot clear tabs"); 188 st = tgetstr("st", &tbp); 189 if (st == NULL) 190 errx(EXIT_FAILURE, "terminal cannot set tabs"); 191 ML = tgetstr("ML", &tbp); 192 193 /* Clear existing tabs */ 194 tputs(cr, 1, putchar); 195 tputs(ct, 1, putchar); 196 tputs(cr, 1, putchar); 197 198 if (ML != NULL) { 199 printf("%*s", margin, ""); 200 tputs(ML, 1, putchar); 201 } else if (margin != 0) 202 warnx("terminal cannot set left margin"); 203 204 if (nstops >= 0) { 205 printf("%*s", stops[0] - 1, ""); 206 tputs(st, 1, putchar); 207 for (i = 1; i < nstops; i++) { 208 printf("%*s", stops[i] - stops[i - 1], ""); 209 tputs(st, 1, putchar); 210 } 211 } else if (inc > 0) { 212 cols = 0; 213 term = getenv("COLUMNS"); 214 if (term != NULL) { 215 errno = 0; 216 cols = strtol(term, &end, 10); 217 if (errno != 0 || *end != '\0' || cols < 0) 218 cols = 0; 219 } 220 if (cols == 0) { 221 if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == 0) 222 cols = ws.ws_col; 223 else { 224 cols = tgetnum("co"); 225 if (cols == 0) { 226 cols = 80; 227 warnx("terminal does not specify number" 228 "columns; defaulting to %d", 229 cols); 230 } 231 } 232 } 233 for (i = 0; i < cols / inc; i++) { 234 printf("%*s", inc, ""); 235 tputs(st, 1, putchar); 236 } 237 } 238 tputs(cr, 1, putchar); 239 240 exit(EXIT_SUCCESS); 241 /* NOTREACHED */ 242 } 243
Indexes created Sun Oct 19 02:09:48 GMT 2025