odsyntax.c revision 96795
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 34#ifndef lint 35#if 0 36static char sccsid[] = "@(#)odsyntax.c 8.2 (Berkeley) 5/4/95"; 37#endif 38static const char rcsid[] = 39 "$FreeBSD: head/usr.bin/hexdump/odsyntax.c 96795 2002-05-17 07:14:55Z tjr $"; 40#endif /* not lint */ 41 42#include <sys/types.h> 43 44#include <ctype.h> 45#include <err.h> 46#include <errno.h> 47#include <float.h> 48#include <stdio.h> 49#include <stdlib.h> 50#include <string.h> 51#include <unistd.h> 52 53#include "hexdump.h" 54 55#define PADDING " " 56 57int odmode; 58 59static void odadd(const char *); 60static void odformat(const char *); 61static const char *odformatfp(char, const char *); 62static const char *odformatint(char, const char *); 63static void odoffset(int, char ***); 64static void odusage(void); 65 66void 67oldsyntax(argc, argvp) 68 int argc; 69 char ***argvp; 70{ 71 static char empty[] = "", padding[] = PADDING; 72 int ch; 73 char **argv, *end; 74 75 /* Add initial (default) address format. -A may change it later. */ 76#define TYPE_OFFSET 7 77 add("\"%07.7_Ao\n\""); 78 add("\"%07.7_ao \""); 79 80 odmode = 1; 81 argv = *argvp; 82 while ((ch = getopt(argc, argv, "A:aBbcDdeFfHhIij:LlN:Oost:vXx")) != -1) 83 switch (ch) { 84 case 'A': 85 switch (*optarg) { 86 case 'd': case 'o': case 'x': 87 fshead->nextfu->fmt[TYPE_OFFSET] = *optarg; 88 fshead->nextfs->nextfu->fmt[TYPE_OFFSET] = 89 *optarg; 90 break; 91 case 'n': 92 fshead->nextfu->fmt = empty; 93 fshead->nextfs->nextfu->fmt = padding; 94 break; 95 default: 96 errx(1, "%s: invalid address base", optarg); 97 } 98 break; 99 case 'a': 100 odformat("a"); 101 break; 102 case 'B': 103 case 'o': 104 odformat("o2"); 105 break; 106 case 'b': 107 odformat("o1"); 108 break; 109 case 'c': 110 odformat("c"); 111 break; 112 case 'd': 113 odformat("u2"); 114 break; 115 case 'D': 116 odformat("u4"); 117 break; 118 case 'e': /* undocumented in od */ 119 case 'F': 120 odformat("fD"); 121 break; 122 case 'f': 123 odformat("fF"); 124 break; 125 case 'H': 126 case 'X': 127 odformat("x4"); 128 break; 129 case 'h': 130 case 'x': 131 odformat("x2"); 132 break; 133 case 'I': 134 case 'L': 135 case 'l': 136 odformat("dL"); 137 break; 138 case 'i': 139 odformat("dI"); 140 break; 141 case 'j': 142 errno = 0; 143 skip = strtoll(optarg, &end, 0); 144 if (*end == 'b') 145 skip *= 512; 146 else if (*end == 'k') 147 skip *= 1024; 148 else if (*end == 'm') 149 skip *= 1048576L; 150 if (errno != 0 || skip < 0 || strlen(end) > 1) 151 errx(1, "%s: invalid skip amount", optarg); 152 break; 153 case 'N': 154 if ((length = atoi(optarg)) <= 0) 155 errx(1, "%s: invalid length", optarg); 156 break; 157 case 'O': 158 odformat("o4"); 159 break; 160 case 's': 161 odformat("d2"); 162 break; 163 case 't': 164 odformat(optarg); 165 break; 166 case 'v': 167 vflag = ALL; 168 break; 169 case '?': 170 default: 171 odusage(); 172 } 173 174 if (fshead->nextfs->nextfs == NULL) 175 odformat("oS"); 176 177 argc -= optind; 178 *argvp += optind; 179 180 if (argc) 181 odoffset(argc, argvp); 182} 183 184static void 185odusage(void) 186{ 187 188 fprintf(stderr, 189"usage: od [-aBbcDdeFfHhIiLlOosvXx] [-A base] [-j skip] [-N length] [-t type]\n"); 190 fprintf(stderr, 191" [[+]offset[.][Bb]] [file ...]\n"); 192 exit(1); 193} 194 195static void 196odoffset(argc, argvp) 197 int argc; 198 char ***argvp; 199{ 200 unsigned char *p, *num, *end; 201 int base; 202 203 /* 204 * The offset syntax of od(1) was genuinely bizarre. First, if 205 * it started with a plus it had to be an offset. Otherwise, if 206 * there were at least two arguments, a number or lower-case 'x' 207 * followed by a number makes it an offset. By default it was 208 * octal; if it started with 'x' or '0x' it was hex. If it ended 209 * in a '.', it was decimal. If a 'b' or 'B' was appended, it 210 * multiplied the number by 512 or 1024 byte units. There was 211 * no way to assign a block count to a hex offset. 212 * 213 * We assume it's a file if the offset is bad. 214 */ 215 p = argc == 1 ? (*argvp)[0] : (*argvp)[1]; 216 217 if (*p != '+' && (argc < 2 || 218 (!isdigit(p[0]) && (p[0] != 'x' || !isxdigit(p[1]))))) 219 return; 220 221 base = 0; 222 /* 223 * skip over leading '+', 'x[0-9a-fA-f]' or '0x', and 224 * set base. 225 */ 226 if (p[0] == '+') 227 ++p; 228 if (p[0] == 'x' && isxdigit(p[1])) { 229 ++p; 230 base = 16; 231 } else if (p[0] == '0' && p[1] == 'x') { 232 p += 2; 233 base = 16; 234 } 235 236 /* skip over the number */ 237 if (base == 16) 238 for (num = p; isxdigit(*p); ++p); 239 else 240 for (num = p; isdigit(*p); ++p); 241 242 /* check for no number */ 243 if (num == p) 244 return; 245 246 /* if terminates with a '.', base is decimal */ 247 if (*p == '.') { 248 if (base) 249 return; 250 base = 10; 251 } 252 253 skip = strtoll(num, (char **)&end, base ? base : 8); 254 255 /* if end isn't the same as p, we got a non-octal digit */ 256 if (end != p) { 257 skip = 0; 258 return; 259 } 260 261 if (*p) { 262 if (*p == 'B') { 263 skip *= 1024; 264 ++p; 265 } else if (*p == 'b') { 266 skip *= 512; 267 ++p; 268 } 269 } 270 271 if (*p) { 272 skip = 0; 273 return; 274 } 275 276 /* 277 * If the offset uses a non-octal base, the base of the offset 278 * is changed as well. This isn't pretty, but it's easy. 279 */ 280 if (base == 16) { 281 fshead->nextfu->fmt[TYPE_OFFSET] = 'x'; 282 fshead->nextfs->nextfu->fmt[TYPE_OFFSET] = 'x'; 283 } else if (base == 10) { 284 fshead->nextfu->fmt[TYPE_OFFSET] = 'd'; 285 fshead->nextfs->nextfu->fmt[TYPE_OFFSET] = 'd'; 286 } 287 288 /* Terminate file list. */ 289 (*argvp)[1] = NULL; 290} 291 292static void 293odformat(const char *fmt) 294{ 295 char fchar; 296 297 while (*fmt != '\0') { 298 switch ((fchar = *fmt++)) { 299 case 'a': 300 odadd("16/1 \"%3_u \" \"\\n\""); 301 break; 302 case 'c': 303 odadd("16/1 \"%3_c \" \"\\n\""); 304 break; 305 case 'o': case 'u': case 'd': case 'x': 306 fmt = odformatint(fchar, fmt); 307 break; 308 case 'f': 309 fmt = odformatfp(fchar, fmt); 310 break; 311 default: 312 errx(1, "%c: unrecognised format character", fchar); 313 } 314 } 315} 316 317static const char * 318odformatfp(char fchar __unused, const char *fmt) 319{ 320 size_t isize; 321 int digits; 322 char *end, *hdfmt; 323 324 isize = sizeof(double); 325 switch (*fmt) { 326 case 'F': 327 isize = sizeof(float); 328 fmt++; 329 break; 330 case 'D': 331 isize = sizeof(double); 332 fmt++; 333 break; 334 case 'L': 335 isize = sizeof(long double); 336 fmt++; 337 break; 338 default: 339 if (isdigit((unsigned char)*fmt)) { 340 errno = 0; 341 isize = (size_t)strtoul(fmt, &end, 10); 342 if (errno != 0 || isize == 0) 343 errx(1, "%s: invalid size", fmt); 344 fmt = (const char *)end; 345 } 346 } 347 switch (isize) { 348 case sizeof(float): 349 digits = FLT_DIG; 350 break; 351 case sizeof(double): 352 digits = DBL_DIG; 353 break; 354 default: 355 if (isize == sizeof(long double)) 356 digits = LDBL_DIG; 357 else 358 errx(1, "unsupported floating point size %lu", 359 (u_long)isize); 360 } 361 362 asprintf(&hdfmt, "%lu/%lu \" %%%d.%de \" \"\\n\"", 363 16UL / (u_long)isize, (u_long)isize, digits + 8, digits); 364 if (hdfmt == NULL) 365 err(1, NULL); 366 odadd(hdfmt); 367 free(hdfmt); 368 369 return (fmt); 370} 371 372static const char * 373odformatint(char fchar, const char *fmt) 374{ 375 unsigned long long n; 376 size_t isize; 377 int digits; 378 char *end, *hdfmt; 379 380 isize = sizeof(int); 381 switch (*fmt) { 382 case 'C': 383 isize = sizeof(char); 384 fmt++; 385 break; 386 case 'I': 387 isize = sizeof(int); 388 fmt++; 389 break; 390 case 'L': 391 isize = sizeof(long); 392 fmt++; 393 break; 394 case 'S': 395 isize = sizeof(short); 396 fmt++; 397 break; 398 default: 399 if (isdigit((unsigned char)*fmt)) { 400 errno = 0; 401 isize = (size_t)strtoul(fmt, &end, 10); 402 if (errno != 0 || isize == 0) 403 errx(1, "%s: invalid size", fmt); 404 if (isize != sizeof(char) && isize != sizeof(short) && 405 isize != sizeof(int) && isize != sizeof(long)) 406 errx(1, "unsupported int size %lu", 407 (u_long)isize); 408 fmt = (const char *)end; 409 } 410 } 411 412 /* 413 * Calculate the maximum number of digits we need to 414 * fit the number. Overestimate for decimal with log 415 * base 8. We need one extra space for signed numbers 416 * to store the sign. 417 */ 418 n = (1ULL << (8 * isize)) - 1; 419 digits = 0; 420 while (n != 0) { 421 digits++; 422 n >>= (fchar == 'x') ? 4 : 3; 423 } 424 if (fchar == 'd') 425 digits++; 426 asprintf(&hdfmt, "%lu/%lu \"%%%s%d%c \" \"\\n\"", 427 16UL / (u_long)isize, (u_long)isize, 428 (fchar == 'd' || fchar == 'u') ? "" : "0", digits, fchar); 429 if (hdfmt == NULL) 430 err(1, NULL); 431 odadd(hdfmt); 432 free(hdfmt); 433 434 return (fmt); 435} 436 437static void 438odadd(const char *fmt) 439{ 440 static int needpad; 441 442 if (needpad) 443 add("\""PADDING"\""); 444 add(fmt); 445 needpad = 1; 446} 447