odsyntax.c revision 132541
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 38#endif /* not lint */ 39#include <sys/cdefs.h> 40__FBSDID("$FreeBSD: head/usr.bin/hexdump/odsyntax.c 132541 2004-07-22 13:14:42Z johan $"); 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(int argc, char ***argvp) 68{ 69 static char empty[] = "", padding[] = PADDING; 70 int ch; 71 char **argv, *end; 72 73 /* Add initial (default) address format. -A may change it later. */ 74#define TYPE_OFFSET 7 75 add("\"%07.7_Ao\n\""); 76 add("\"%07.7_ao \""); 77 78 odmode = 1; 79 argv = *argvp; 80 while ((ch = getopt(argc, argv, "A:aBbcDdeFfHhIij:LlN:Oost:vXx")) != -1) 81 switch (ch) { 82 case 'A': 83 switch (*optarg) { 84 case 'd': case 'o': case 'x': 85 fshead->nextfu->fmt[TYPE_OFFSET] = *optarg; 86 fshead->nextfs->nextfu->fmt[TYPE_OFFSET] = 87 *optarg; 88 break; 89 case 'n': 90 fshead->nextfu->fmt = empty; 91 fshead->nextfs->nextfu->fmt = padding; 92 break; 93 default: 94 errx(1, "%s: invalid address base", optarg); 95 } 96 break; 97 case 'a': 98 odformat("a"); 99 break; 100 case 'B': 101 case 'o': 102 odformat("o2"); 103 break; 104 case 'b': 105 odformat("o1"); 106 break; 107 case 'c': 108 odformat("c"); 109 break; 110 case 'd': 111 odformat("u2"); 112 break; 113 case 'D': 114 odformat("u4"); 115 break; 116 case 'e': /* undocumented in od */ 117 case 'F': 118 odformat("fD"); 119 break; 120 case 'f': 121 odformat("fF"); 122 break; 123 case 'H': 124 case 'X': 125 odformat("x4"); 126 break; 127 case 'h': 128 case 'x': 129 odformat("x2"); 130 break; 131 case 'I': 132 case 'L': 133 case 'l': 134 odformat("dL"); 135 break; 136 case 'i': 137 odformat("dI"); 138 break; 139 case 'j': 140 errno = 0; 141 skip = strtoll(optarg, &end, 0); 142 if (*end == 'b') 143 skip *= 512; 144 else if (*end == 'k') 145 skip *= 1024; 146 else if (*end == 'm') 147 skip *= 1048576L; 148 if (errno != 0 || skip < 0 || strlen(end) > 1) 149 errx(1, "%s: invalid skip amount", optarg); 150 break; 151 case 'N': 152 if ((length = atoi(optarg)) <= 0) 153 errx(1, "%s: invalid length", optarg); 154 break; 155 case 'O': 156 odformat("o4"); 157 break; 158 case 's': 159 odformat("d2"); 160 break; 161 case 't': 162 odformat(optarg); 163 break; 164 case 'v': 165 vflag = ALL; 166 break; 167 case '?': 168 default: 169 odusage(); 170 } 171 172 if (fshead->nextfs->nextfs == NULL) 173 odformat("oS"); 174 175 argc -= optind; 176 *argvp += optind; 177 178 if (argc) 179 odoffset(argc, argvp); 180} 181 182static void 183odusage(void) 184{ 185 186 fprintf(stderr, 187"usage: od [-aBbcDdeFfHhIiLlOosvXx] [-A base] [-j skip] [-N length] [-t type]\n"); 188 fprintf(stderr, 189" [[+]offset[.][Bb]] [file ...]\n"); 190 exit(1); 191} 192 193static void 194odoffset(int argc, char ***argvp) 195{ 196 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, &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 288static void 289odformat(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 313static const char * 314odformatfp(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 368static const char * 369odformatint(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 433static void 434odadd(const char *fmt) 435{ 436 static int needpad; 437 438 if (needpad) 439 add("\""PADDING"\""); 440 add(fmt); 441 needpad = 1; 442} 443