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. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)odsyntax.c 8.2 (Berkeley) 5/4/95 30 * $FreeBSD: src/usr.bin/hexdump/odsyntax.c,v 1.8.2.1 2002/07/23 14:27:06 tjr Exp $ 31 * $DragonFly: src/usr.bin/hexdump/odsyntax.c,v 1.3 2003/10/04 20:36:45 hmp Exp $ 32 */ 33 34 #include <sys/types.h> 35 36 #include <ctype.h> 37 #include <err.h> 38 #include <errno.h> 39 #include <float.h> 40 #include <stdio.h> 41 #include <stdlib.h> 42 #include <string.h> 43 #include <unistd.h> 44 45 #include "hexdump.h" 46 47 #define PADDING " " 48 49 int odmode; 50 51 static void odadd(const char *); 52 static void odformat(const char *); 53 static const char *odformatfp(char, const char *); 54 static const char *odformatint(char, const char *); 55 static void odoffset(int, char ***); 56 static void odusage(void); 57 58 void 59 oldsyntax(int argc, char ***argvp) 60 { 61 static char empty[] = "", padding[] = PADDING; 62 int ch; 63 char **argv, *end; 64 65 /* Add initial (default) address format. -A may change it later. */ 66 #define TYPE_OFFSET 7 67 add("\"%07.7_Ao\n\""); 68 add("\"%07.7_ao \""); 69 70 odmode = 1; 71 argv = *argvp; 72 while ((ch = getopt(argc, argv, "A:aBbcDdeFfHhIij:LlN:Oost:vXx")) != -1) 73 switch (ch) { 74 case 'A': 75 switch (*optarg) { 76 case 'd': case 'o': case 'x': 77 fshead->nextfu->fmt[TYPE_OFFSET] = *optarg; 78 fshead->nextfs->nextfu->fmt[TYPE_OFFSET] = 79 *optarg; 80 break; 81 case 'n': 82 fshead->nextfu->fmt = empty; 83 fshead->nextfs->nextfu->fmt = padding; 84 break; 85 default: 86 errx(1, "%s: invalid address base", optarg); 87 } 88 break; 89 case 'a': 90 odformat("a"); 91 break; 92 case 'B': 93 case 'o': 94 odformat("o2"); 95 break; 96 case 'b': 97 odformat("o1"); 98 break; 99 case 'c': 100 odformat("c"); 101 break; 102 case 'd': 103 odformat("u2"); 104 break; 105 case 'D': 106 odformat("u4"); 107 break; 108 case 'e': /* undocumented in od */ 109 case 'F': 110 odformat("fD"); 111 break; 112 case 'f': 113 odformat("fF"); 114 break; 115 case 'H': 116 case 'X': 117 odformat("x4"); 118 break; 119 case 'h': 120 case 'x': 121 odformat("x2"); 122 break; 123 case 'I': 124 case 'L': 125 case 'l': 126 odformat("dL"); 127 break; 128 case 'i': 129 odformat("dI"); 130 break; 131 case 'j': 132 errno = 0; 133 skip = strtoll(optarg, &end, 0); 134 if (*end == 'b') 135 skip *= 512; 136 else if (*end == 'k') 137 skip *= 1024; 138 else if (*end == 'm') 139 skip *= 1048576L; 140 if (errno != 0 || skip < 0 || strlen(end) > 1) 141 errx(1, "%s: invalid skip amount", optarg); 142 break; 143 case 'N': 144 if ((length = atoi(optarg)) <= 0) 145 errx(1, "%s: invalid length", optarg); 146 break; 147 case 'O': 148 odformat("o4"); 149 break; 150 case 's': 151 odformat("d2"); 152 break; 153 case 't': 154 odformat(optarg); 155 break; 156 case 'v': 157 vflag = ALL; 158 break; 159 case '?': 160 default: 161 odusage(); 162 } 163 164 if (fshead->nextfs->nextfs == NULL) 165 odformat("oS"); 166 167 argc -= optind; 168 *argvp += optind; 169 170 if (argc) 171 odoffset(argc, argvp); 172 } 173 174 static void 175 odusage(void) 176 { 177 178 fprintf(stderr, 179 "usage: od [-aBbcDdeFfHhIiLlOosvXx] [-A base] [-j skip] [-N length] [-t type]\n"); 180 fprintf(stderr, 181 " [[+]offset[.][Bb]] [file ...]\n"); 182 exit(1); 183 } 184 185 static void 186 odoffset(int argc, char ***argvp) 187 { 188 unsigned char *p, *num, *end; 189 int base; 190 191 /* 192 * The offset syntax of od(1) was genuinely bizarre. First, if 193 * it started with a plus it had to be an offset. Otherwise, if 194 * there were at least two arguments, a number or lower-case 'x' 195 * followed by a number makes it an offset. By default it was 196 * octal; if it started with 'x' or '0x' it was hex. If it ended 197 * in a '.', it was decimal. If a 'b' or 'B' was appended, it 198 * multiplied the number by 512 or 1024 byte units. There was 199 * no way to assign a block count to a hex offset. 200 * 201 * We assume it's a file if the offset is bad. 202 */ 203 p = argc == 1 ? (*argvp)[0] : (*argvp)[1]; 204 205 if (*p != '+' && (argc < 2 || 206 (!isdigit(p[0]) && (p[0] != 'x' || !isxdigit(p[1]))))) 207 return; 208 209 base = 0; 210 /* 211 * skip over leading '+', 'x[0-9a-fA-f]' or '0x', and 212 * set base. 213 */ 214 if (p[0] == '+') 215 ++p; 216 if (p[0] == 'x' && isxdigit(p[1])) { 217 ++p; 218 base = 16; 219 } else if (p[0] == '0' && p[1] == 'x') { 220 p += 2; 221 base = 16; 222 } 223 224 /* skip over the number */ 225 if (base == 16) 226 for (num = p; isxdigit(*p); ++p); 227 else 228 for (num = p; isdigit(*p); ++p); 229 230 /* check for no number */ 231 if (num == p) 232 return; 233 234 /* if terminates with a '.', base is decimal */ 235 if (*p == '.') { 236 if (base) 237 return; 238 base = 10; 239 } 240 241 skip = strtoll(num, (char **)&end, base ? base : 8); 242 243 /* if end isn't the same as p, we got a non-octal digit */ 244 if (end != p) { 245 skip = 0; 246 return; 247 } 248 249 if (*p) { 250 if (*p == 'B') { 251 skip *= 1024; 252 ++p; 253 } else if (*p == 'b') { 254 skip *= 512; 255 ++p; 256 } 257 } 258 259 if (*p) { 260 skip = 0; 261 return; 262 } 263 264 /* 265 * If the offset uses a non-octal base, the base of the offset 266 * is changed as well. This isn't pretty, but it's easy. 267 */ 268 if (base == 16) { 269 fshead->nextfu->fmt[TYPE_OFFSET] = 'x'; 270 fshead->nextfs->nextfu->fmt[TYPE_OFFSET] = 'x'; 271 } else if (base == 10) { 272 fshead->nextfu->fmt[TYPE_OFFSET] = 'd'; 273 fshead->nextfs->nextfu->fmt[TYPE_OFFSET] = 'd'; 274 } 275 276 /* Terminate file list. */ 277 (*argvp)[1] = NULL; 278 } 279 280 static void 281 odformat(const char *fmt) 282 { 283 char fchar; 284 285 while (*fmt != '\0') { 286 switch ((fchar = *fmt++)) { 287 case 'a': 288 odadd("16/1 \"%3_u \" \"\\n\""); 289 break; 290 case 'c': 291 odadd("16/1 \"%3_c \" \"\\n\""); 292 break; 293 case 'o': case 'u': case 'd': case 'x': 294 fmt = odformatint(fchar, fmt); 295 break; 296 case 'f': 297 fmt = odformatfp(fchar, fmt); 298 break; 299 default: 300 errx(1, "%c: unrecognised format character", fchar); 301 } 302 } 303 } 304 305 static const char * 306 odformatfp(char fchar __unused, const char *fmt) 307 { 308 size_t isize; 309 int digits; 310 char *end, *hdfmt; 311 312 isize = sizeof(double); 313 switch (*fmt) { 314 case 'F': 315 isize = sizeof(float); 316 fmt++; 317 break; 318 case 'D': 319 isize = sizeof(double); 320 fmt++; 321 break; 322 case 'L': 323 isize = sizeof(long double); 324 fmt++; 325 break; 326 default: 327 if (isdigit((unsigned char)*fmt)) { 328 errno = 0; 329 isize = (size_t)strtoul(fmt, &end, 10); 330 if (errno != 0 || isize == 0) 331 errx(1, "%s: invalid size", fmt); 332 fmt = (const char *)end; 333 } 334 } 335 switch (isize) { 336 case sizeof(float): 337 digits = FLT_DIG; 338 break; 339 case sizeof(double): 340 digits = DBL_DIG; 341 break; 342 default: 343 if (isize == sizeof(long double)) 344 digits = LDBL_DIG; 345 else 346 errx(1, "unsupported floating point size %lu", 347 (u_long)isize); 348 } 349 350 asprintf(&hdfmt, "%lu/%lu \" %%%d.%de \" \"\\n\"", 351 16UL / (u_long)isize, (u_long)isize, digits + 8, digits); 352 if (hdfmt == NULL) 353 err(1, NULL); 354 odadd(hdfmt); 355 free(hdfmt); 356 357 return (fmt); 358 } 359 360 static const char * 361 odformatint(char fchar, const char *fmt) 362 { 363 unsigned long long n; 364 size_t isize; 365 int digits; 366 char *end, *hdfmt; 367 368 isize = sizeof(int); 369 switch (*fmt) { 370 case 'C': 371 isize = sizeof(char); 372 fmt++; 373 break; 374 case 'I': 375 isize = sizeof(int); 376 fmt++; 377 break; 378 case 'L': 379 isize = sizeof(long); 380 fmt++; 381 break; 382 case 'S': 383 isize = sizeof(short); 384 fmt++; 385 break; 386 default: 387 if (isdigit((unsigned char)*fmt)) { 388 errno = 0; 389 isize = (size_t)strtoul(fmt, &end, 10); 390 if (errno != 0 || isize == 0) 391 errx(1, "%s: invalid size", fmt); 392 if (isize != sizeof(char) && isize != sizeof(short) && 393 isize != sizeof(int) && isize != sizeof(long)) 394 errx(1, "unsupported int size %lu", 395 (u_long)isize); 396 fmt = (const char *)end; 397 } 398 } 399 400 /* 401 * Calculate the maximum number of digits we need to 402 * fit the number. Overestimate for decimal with log 403 * base 8. We need one extra space for signed numbers 404 * to store the sign. 405 */ 406 n = (1ULL << (8 * isize)) - 1; 407 digits = 0; 408 while (n != 0) { 409 digits++; 410 n >>= (fchar == 'x') ? 4 : 3; 411 } 412 if (fchar == 'd') 413 digits++; 414 asprintf(&hdfmt, "%lu/%lu \"%*s%%%s%d%c\" \"\\n\"", 415 16UL / (u_long)isize, (u_long)isize, (int)(4 * isize - digits), 416 "", (fchar == 'd' || fchar == 'u') ? "" : "0", digits, fchar); 417 if (hdfmt == NULL) 418 err(1, NULL); 419 odadd(hdfmt); 420 free(hdfmt); 421 422 return (fmt); 423 } 424 425 static void 426 odadd(const char *fmt) 427 { 428 static int needpad; 429 430 if (needpad) 431 add("\""PADDING"\""); 432 add(fmt); 433 needpad = 1; 434 } 435