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 1.3 2003/10/04 20:36:45 hmp 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(int argc, char ***argvp) 64 { 65 static char empty[] = "", padding[] = PADDING; 66 int ch; 67 char **argv, *end; 68 69 /* Add initial (default) address format. -A may change it later. */ 70 #define TYPE_OFFSET 7 71 add("\"%07.7_Ao\n\""); 72 add("\"%07.7_ao \""); 73 74 odmode = 1; 75 argv = *argvp; 76 while ((ch = getopt(argc, argv, "A:aBbcDdeFfHhIij:LlN:Oost:vXx")) != -1) 77 switch (ch) { 78 case 'A': 79 switch (*optarg) { 80 case 'd': case 'o': case 'x': 81 fshead->nextfu->fmt[TYPE_OFFSET] = *optarg; 82 fshead->nextfs->nextfu->fmt[TYPE_OFFSET] = 83 *optarg; 84 break; 85 case 'n': 86 fshead->nextfu->fmt = empty; 87 fshead->nextfs->nextfu->fmt = padding; 88 break; 89 default: 90 errx(1, "%s: invalid address base", optarg); 91 } 92 break; 93 case 'a': 94 odformat("a"); 95 break; 96 case 'B': 97 case 'o': 98 odformat("o2"); 99 break; 100 case 'b': 101 odformat("o1"); 102 break; 103 case 'c': 104 odformat("c"); 105 break; 106 case 'd': 107 odformat("u2"); 108 break; 109 case 'D': 110 odformat("u4"); 111 break; 112 case 'e': /* undocumented in od */ 113 case 'F': 114 odformat("fD"); 115 break; 116 case 'f': 117 odformat("fF"); 118 break; 119 case 'H': 120 case 'X': 121 odformat("x4"); 122 break; 123 case 'h': 124 case 'x': 125 odformat("x2"); 126 break; 127 case 'I': 128 case 'L': 129 case 'l': 130 odformat("dL"); 131 break; 132 case 'i': 133 odformat("dI"); 134 break; 135 case 'j': 136 errno = 0; 137 skip = strtoll(optarg, &end, 0); 138 if (*end == 'b') 139 skip *= 512; 140 else if (*end == 'k') 141 skip *= 1024; 142 else if (*end == 'm') 143 skip *= 1048576L; 144 if (errno != 0 || skip < 0 || strlen(end) > 1) 145 errx(1, "%s: invalid skip amount", optarg); 146 break; 147 case 'N': 148 if ((length = atoi(optarg)) <= 0) 149 errx(1, "%s: invalid length", optarg); 150 break; 151 case 'O': 152 odformat("o4"); 153 break; 154 case 's': 155 odformat("d2"); 156 break; 157 case 't': 158 odformat(optarg); 159 break; 160 case 'v': 161 vflag = ALL; 162 break; 163 case '?': 164 default: 165 odusage(); 166 } 167 168 if (fshead->nextfs->nextfs == NULL) 169 odformat("oS"); 170 171 argc -= optind; 172 *argvp += optind; 173 174 if (argc) 175 odoffset(argc, argvp); 176 } 177 178 static void 179 odusage(void) 180 { 181 182 fprintf(stderr, 183 "usage: od [-aBbcDdeFfHhIiLlOosvXx] [-A base] [-j skip] [-N length] [-t type]\n"); 184 fprintf(stderr, 185 " [[+]offset[.][Bb]] [file ...]\n"); 186 exit(1); 187 } 188 189 static void 190 odoffset(int argc, char ***argvp) 191 { 192 unsigned char *p, *num, *end; 193 int base; 194 195 /* 196 * The offset syntax of od(1) was genuinely bizarre. First, if 197 * it started with a plus it had to be an offset. Otherwise, if 198 * there were at least two arguments, a number or lower-case 'x' 199 * followed by a number makes it an offset. By default it was 200 * octal; if it started with 'x' or '0x' it was hex. If it ended 201 * in a '.', it was decimal. If a 'b' or 'B' was appended, it 202 * multiplied the number by 512 or 1024 byte units. There was 203 * no way to assign a block count to a hex offset. 204 * 205 * We assume it's a file if the offset is bad. 206 */ 207 p = argc == 1 ? (*argvp)[0] : (*argvp)[1]; 208 209 if (*p != '+' && (argc < 2 || 210 (!isdigit(p[0]) && (p[0] != 'x' || !isxdigit(p[1]))))) 211 return; 212 213 base = 0; 214 /* 215 * skip over leading '+', 'x[0-9a-fA-f]' or '0x', and 216 * set base. 217 */ 218 if (p[0] == '+') 219 ++p; 220 if (p[0] == 'x' && isxdigit(p[1])) { 221 ++p; 222 base = 16; 223 } else if (p[0] == '0' && p[1] == 'x') { 224 p += 2; 225 base = 16; 226 } 227 228 /* skip over the number */ 229 if (base == 16) 230 for (num = p; isxdigit(*p); ++p); 231 else 232 for (num = p; isdigit(*p); ++p); 233 234 /* check for no number */ 235 if (num == p) 236 return; 237 238 /* if terminates with a '.', base is decimal */ 239 if (*p == '.') { 240 if (base) 241 return; 242 base = 10; 243 } 244 245 skip = strtoll(num, (char **)&end, base ? base : 8); 246 247 /* if end isn't the same as p, we got a non-octal digit */ 248 if (end != p) { 249 skip = 0; 250 return; 251 } 252 253 if (*p) { 254 if (*p == 'B') { 255 skip *= 1024; 256 ++p; 257 } else if (*p == 'b') { 258 skip *= 512; 259 ++p; 260 } 261 } 262 263 if (*p) { 264 skip = 0; 265 return; 266 } 267 268 /* 269 * If the offset uses a non-octal base, the base of the offset 270 * is changed as well. This isn't pretty, but it's easy. 271 */ 272 if (base == 16) { 273 fshead->nextfu->fmt[TYPE_OFFSET] = 'x'; 274 fshead->nextfs->nextfu->fmt[TYPE_OFFSET] = 'x'; 275 } else if (base == 10) { 276 fshead->nextfu->fmt[TYPE_OFFSET] = 'd'; 277 fshead->nextfs->nextfu->fmt[TYPE_OFFSET] = 'd'; 278 } 279 280 /* Terminate file list. */ 281 (*argvp)[1] = NULL; 282 } 283 284 static void 285 odformat(const char *fmt) 286 { 287 char fchar; 288 289 while (*fmt != '\0') { 290 switch ((fchar = *fmt++)) { 291 case 'a': 292 odadd("16/1 \"%3_u \" \"\\n\""); 293 break; 294 case 'c': 295 odadd("16/1 \"%3_c \" \"\\n\""); 296 break; 297 case 'o': case 'u': case 'd': case 'x': 298 fmt = odformatint(fchar, fmt); 299 break; 300 case 'f': 301 fmt = odformatfp(fchar, fmt); 302 break; 303 default: 304 errx(1, "%c: unrecognised format character", fchar); 305 } 306 } 307 } 308 309 static const char * 310 odformatfp(char fchar __unused, const char *fmt) 311 { 312 size_t isize; 313 int digits; 314 char *end, *hdfmt; 315 316 isize = sizeof(double); 317 switch (*fmt) { 318 case 'F': 319 isize = sizeof(float); 320 fmt++; 321 break; 322 case 'D': 323 isize = sizeof(double); 324 fmt++; 325 break; 326 case 'L': 327 isize = sizeof(long double); 328 fmt++; 329 break; 330 default: 331 if (isdigit((unsigned char)*fmt)) { 332 errno = 0; 333 isize = (size_t)strtoul(fmt, &end, 10); 334 if (errno != 0 || isize == 0) 335 errx(1, "%s: invalid size", fmt); 336 fmt = (const char *)end; 337 } 338 } 339 switch (isize) { 340 case sizeof(float): 341 digits = FLT_DIG; 342 break; 343 case sizeof(double): 344 digits = DBL_DIG; 345 break; 346 default: 347 if (isize == sizeof(long double)) 348 digits = LDBL_DIG; 349 else 350 errx(1, "unsupported floating point size %lu", 351 (u_long)isize); 352 } 353 354 asprintf(&hdfmt, "%lu/%lu \" %%%d.%de \" \"\\n\"", 355 16UL / (u_long)isize, (u_long)isize, digits + 8, digits); 356 if (hdfmt == NULL) 357 err(1, NULL); 358 odadd(hdfmt); 359 free(hdfmt); 360 361 return (fmt); 362 } 363 364 static const char * 365 odformatint(char fchar, const char *fmt) 366 { 367 unsigned long long n; 368 size_t isize; 369 int digits; 370 char *end, *hdfmt; 371 372 isize = sizeof(int); 373 switch (*fmt) { 374 case 'C': 375 isize = sizeof(char); 376 fmt++; 377 break; 378 case 'I': 379 isize = sizeof(int); 380 fmt++; 381 break; 382 case 'L': 383 isize = sizeof(long); 384 fmt++; 385 break; 386 case 'S': 387 isize = sizeof(short); 388 fmt++; 389 break; 390 default: 391 if (isdigit((unsigned char)*fmt)) { 392 errno = 0; 393 isize = (size_t)strtoul(fmt, &end, 10); 394 if (errno != 0 || isize == 0) 395 errx(1, "%s: invalid size", fmt); 396 if (isize != sizeof(char) && isize != sizeof(short) && 397 isize != sizeof(int) && isize != sizeof(long)) 398 errx(1, "unsupported int size %lu", 399 (u_long)isize); 400 fmt = (const char *)end; 401 } 402 } 403 404 /* 405 * Calculate the maximum number of digits we need to 406 * fit the number. Overestimate for decimal with log 407 * base 8. We need one extra space for signed numbers 408 * to store the sign. 409 */ 410 n = (1ULL << (8 * isize)) - 1; 411 digits = 0; 412 while (n != 0) { 413 digits++; 414 n >>= (fchar == 'x') ? 4 : 3; 415 } 416 if (fchar == 'd') 417 digits++; 418 asprintf(&hdfmt, "%lu/%lu \"%*s%%%s%d%c\" \"\\n\"", 419 16UL / (u_long)isize, (u_long)isize, (int)(4 * isize - digits), 420 "", (fchar == 'd' || fchar == 'u') ? "" : "0", digits, fchar); 421 if (hdfmt == NULL) 422 err(1, NULL); 423 odadd(hdfmt); 424 free(hdfmt); 425 426 return (fmt); 427 } 428 429 static void 430 odadd(const char *fmt) 431 { 432 static int needpad; 433 434 if (needpad) 435 add("\""PADDING"\""); 436 add(fmt); 437 needpad = 1; 438 } 439