1 /*- 2 * Copyright (c) 1990, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)odsyntax.c 8.2 (Berkeley) 5/4/95 34 * $FreeBSD: src/usr.bin/hexdump/odsyntax.c,v 1.8.2.1 2002/07/23 14:27:06 tjr Exp $ 35 * $DragonFly: src/usr.bin/hexdump/odsyntax.c,v 1.2 2003/06/17 04:29:27 dillon Exp $ 36 */ 37 38 #include <sys/types.h> 39 40 #include <ctype.h> 41 #include <err.h> 42 #include <errno.h> 43 #include <float.h> 44 #include <stdio.h> 45 #include <stdlib.h> 46 #include <string.h> 47 #include <unistd.h> 48 49 #include "hexdump.h" 50 51 #define PADDING " " 52 53 int odmode; 54 55 static void odadd(const char *); 56 static void odformat(const char *); 57 static const char *odformatfp(char, const char *); 58 static const char *odformatint(char, const char *); 59 static void odoffset(int, char ***); 60 static void odusage(void); 61 62 void 63 oldsyntax(argc, argvp) 64 int argc; 65 char ***argvp; 66 { 67 static char empty[] = "", padding[] = PADDING; 68 int ch; 69 char **argv, *end; 70 71 /* Add initial (default) address format. -A may change it later. */ 72 #define TYPE_OFFSET 7 73 add("\"%07.7_Ao\n\""); 74 add("\"%07.7_ao \""); 75 76 odmode = 1; 77 argv = *argvp; 78 while ((ch = getopt(argc, argv, "A:aBbcDdeFfHhIij:LlN:Oost:vXx")) != -1) 79 switch (ch) { 80 case 'A': 81 switch (*optarg) { 82 case 'd': case 'o': case 'x': 83 fshead->nextfu->fmt[TYPE_OFFSET] = *optarg; 84 fshead->nextfs->nextfu->fmt[TYPE_OFFSET] = 85 *optarg; 86 break; 87 case 'n': 88 fshead->nextfu->fmt = empty; 89 fshead->nextfs->nextfu->fmt = padding; 90 break; 91 default: 92 errx(1, "%s: invalid address base", optarg); 93 } 94 break; 95 case 'a': 96 odformat("a"); 97 break; 98 case 'B': 99 case 'o': 100 odformat("o2"); 101 break; 102 case 'b': 103 odformat("o1"); 104 break; 105 case 'c': 106 odformat("c"); 107 break; 108 case 'd': 109 odformat("u2"); 110 break; 111 case 'D': 112 odformat("u4"); 113 break; 114 case 'e': /* undocumented in od */ 115 case 'F': 116 odformat("fD"); 117 break; 118 case 'f': 119 odformat("fF"); 120 break; 121 case 'H': 122 case 'X': 123 odformat("x4"); 124 break; 125 case 'h': 126 case 'x': 127 odformat("x2"); 128 break; 129 case 'I': 130 case 'L': 131 case 'l': 132 odformat("dL"); 133 break; 134 case 'i': 135 odformat("dI"); 136 break; 137 case 'j': 138 errno = 0; 139 skip = strtoll(optarg, &end, 0); 140 if (*end == 'b') 141 skip *= 512; 142 else if (*end == 'k') 143 skip *= 1024; 144 else if (*end == 'm') 145 skip *= 1048576L; 146 if (errno != 0 || skip < 0 || strlen(end) > 1) 147 errx(1, "%s: invalid skip amount", optarg); 148 break; 149 case 'N': 150 if ((length = atoi(optarg)) <= 0) 151 errx(1, "%s: invalid length", optarg); 152 break; 153 case 'O': 154 odformat("o4"); 155 break; 156 case 's': 157 odformat("d2"); 158 break; 159 case 't': 160 odformat(optarg); 161 break; 162 case 'v': 163 vflag = ALL; 164 break; 165 case '?': 166 default: 167 odusage(); 168 } 169 170 if (fshead->nextfs->nextfs == NULL) 171 odformat("oS"); 172 173 argc -= optind; 174 *argvp += optind; 175 176 if (argc) 177 odoffset(argc, argvp); 178 } 179 180 static void 181 odusage(void) 182 { 183 184 fprintf(stderr, 185 "usage: od [-aBbcDdeFfHhIiLlOosvXx] [-A base] [-j skip] [-N length] [-t type]\n"); 186 fprintf(stderr, 187 " [[+]offset[.][Bb]] [file ...]\n"); 188 exit(1); 189 } 190 191 static void 192 odoffset(argc, argvp) 193 int argc; 194 char ***argvp; 195 { 196 unsigned char *p, *num, *end; 197 int base; 198 199 /* 200 * The offset syntax of od(1) was genuinely bizarre. First, if 201 * it started with a plus it had to be an offset. Otherwise, if 202 * there were at least two arguments, a number or lower-case 'x' 203 * followed by a number makes it an offset. By default it was 204 * octal; if it started with 'x' or '0x' it was hex. If it ended 205 * in a '.', it was decimal. If a 'b' or 'B' was appended, it 206 * multiplied the number by 512 or 1024 byte units. There was 207 * no way to assign a block count to a hex offset. 208 * 209 * We assume it's a file if the offset is bad. 210 */ 211 p = argc == 1 ? (*argvp)[0] : (*argvp)[1]; 212 213 if (*p != '+' && (argc < 2 || 214 (!isdigit(p[0]) && (p[0] != 'x' || !isxdigit(p[1]))))) 215 return; 216 217 base = 0; 218 /* 219 * skip over leading '+', 'x[0-9a-fA-f]' or '0x', and 220 * set base. 221 */ 222 if (p[0] == '+') 223 ++p; 224 if (p[0] == 'x' && isxdigit(p[1])) { 225 ++p; 226 base = 16; 227 } else if (p[0] == '0' && p[1] == 'x') { 228 p += 2; 229 base = 16; 230 } 231 232 /* skip over the number */ 233 if (base == 16) 234 for (num = p; isxdigit(*p); ++p); 235 else 236 for (num = p; isdigit(*p); ++p); 237 238 /* check for no number */ 239 if (num == p) 240 return; 241 242 /* if terminates with a '.', base is decimal */ 243 if (*p == '.') { 244 if (base) 245 return; 246 base = 10; 247 } 248 249 skip = strtoll(num, (char **)&end, base ? base : 8); 250 251 /* if end isn't the same as p, we got a non-octal digit */ 252 if (end != p) { 253 skip = 0; 254 return; 255 } 256 257 if (*p) { 258 if (*p == 'B') { 259 skip *= 1024; 260 ++p; 261 } else if (*p == 'b') { 262 skip *= 512; 263 ++p; 264 } 265 } 266 267 if (*p) { 268 skip = 0; 269 return; 270 } 271 272 /* 273 * If the offset uses a non-octal base, the base of the offset 274 * is changed as well. This isn't pretty, but it's easy. 275 */ 276 if (base == 16) { 277 fshead->nextfu->fmt[TYPE_OFFSET] = 'x'; 278 fshead->nextfs->nextfu->fmt[TYPE_OFFSET] = 'x'; 279 } else if (base == 10) { 280 fshead->nextfu->fmt[TYPE_OFFSET] = 'd'; 281 fshead->nextfs->nextfu->fmt[TYPE_OFFSET] = 'd'; 282 } 283 284 /* Terminate file list. */ 285 (*argvp)[1] = NULL; 286 } 287 288 static void 289 odformat(const char *fmt) 290 { 291 char fchar; 292 293 while (*fmt != '\0') { 294 switch ((fchar = *fmt++)) { 295 case 'a': 296 odadd("16/1 \"%3_u \" \"\\n\""); 297 break; 298 case 'c': 299 odadd("16/1 \"%3_c \" \"\\n\""); 300 break; 301 case 'o': case 'u': case 'd': case 'x': 302 fmt = odformatint(fchar, fmt); 303 break; 304 case 'f': 305 fmt = odformatfp(fchar, fmt); 306 break; 307 default: 308 errx(1, "%c: unrecognised format character", fchar); 309 } 310 } 311 } 312 313 static const char * 314 odformatfp(char fchar __unused, const char *fmt) 315 { 316 size_t isize; 317 int digits; 318 char *end, *hdfmt; 319 320 isize = sizeof(double); 321 switch (*fmt) { 322 case 'F': 323 isize = sizeof(float); 324 fmt++; 325 break; 326 case 'D': 327 isize = sizeof(double); 328 fmt++; 329 break; 330 case 'L': 331 isize = sizeof(long double); 332 fmt++; 333 break; 334 default: 335 if (isdigit((unsigned char)*fmt)) { 336 errno = 0; 337 isize = (size_t)strtoul(fmt, &end, 10); 338 if (errno != 0 || isize == 0) 339 errx(1, "%s: invalid size", fmt); 340 fmt = (const char *)end; 341 } 342 } 343 switch (isize) { 344 case sizeof(float): 345 digits = FLT_DIG; 346 break; 347 case sizeof(double): 348 digits = DBL_DIG; 349 break; 350 default: 351 if (isize == sizeof(long double)) 352 digits = LDBL_DIG; 353 else 354 errx(1, "unsupported floating point size %lu", 355 (u_long)isize); 356 } 357 358 asprintf(&hdfmt, "%lu/%lu \" %%%d.%de \" \"\\n\"", 359 16UL / (u_long)isize, (u_long)isize, digits + 8, digits); 360 if (hdfmt == NULL) 361 err(1, NULL); 362 odadd(hdfmt); 363 free(hdfmt); 364 365 return (fmt); 366 } 367 368 static const char * 369 odformatint(char fchar, const char *fmt) 370 { 371 unsigned long long n; 372 size_t isize; 373 int digits; 374 char *end, *hdfmt; 375 376 isize = sizeof(int); 377 switch (*fmt) { 378 case 'C': 379 isize = sizeof(char); 380 fmt++; 381 break; 382 case 'I': 383 isize = sizeof(int); 384 fmt++; 385 break; 386 case 'L': 387 isize = sizeof(long); 388 fmt++; 389 break; 390 case 'S': 391 isize = sizeof(short); 392 fmt++; 393 break; 394 default: 395 if (isdigit((unsigned char)*fmt)) { 396 errno = 0; 397 isize = (size_t)strtoul(fmt, &end, 10); 398 if (errno != 0 || isize == 0) 399 errx(1, "%s: invalid size", fmt); 400 if (isize != sizeof(char) && isize != sizeof(short) && 401 isize != sizeof(int) && isize != sizeof(long)) 402 errx(1, "unsupported int size %lu", 403 (u_long)isize); 404 fmt = (const char *)end; 405 } 406 } 407 408 /* 409 * Calculate the maximum number of digits we need to 410 * fit the number. Overestimate for decimal with log 411 * base 8. We need one extra space for signed numbers 412 * to store the sign. 413 */ 414 n = (1ULL << (8 * isize)) - 1; 415 digits = 0; 416 while (n != 0) { 417 digits++; 418 n >>= (fchar == 'x') ? 4 : 3; 419 } 420 if (fchar == 'd') 421 digits++; 422 asprintf(&hdfmt, "%lu/%lu \"%*s%%%s%d%c\" \"\\n\"", 423 16UL / (u_long)isize, (u_long)isize, (int)(4 * isize - digits), 424 "", (fchar == 'd' || fchar == 'u') ? "" : "0", digits, fchar); 425 if (hdfmt == NULL) 426 err(1, NULL); 427 odadd(hdfmt); 428 free(hdfmt); 429 430 return (fmt); 431 } 432 433 static void 434 odadd(const char *fmt) 435 { 436 static int needpad; 437 438 if (needpad) 439 add("\""PADDING"\""); 440 add(fmt); 441 needpad = 1; 442 } 443