usr.bin/hexdump/odsyntax.c

   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
  36 static char sccsid[] = "@(#)odsyntax.c  8.2 (Berkeley) 5/4/95";
  37 #endif
  38 #endif /* not lint */
  39 #include <sys/cdefs.h>
  40 __FBSDID("$FreeBSD$");
  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
  57 int odmode;
  58
  59 static void odadd(const char *);
  60 static void odformat(const char *);
  61 static const char *odformatfp(char, const char *);
  62 static const char *odformatint(char, const char *);
  63 static void odoffset(int, char ***);
  64 static void odusage(void);
  65
  66 void
  67 oldsyntax(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
 182 static void
 183 odusage(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
 193 static void
 194 odoffset(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
 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 }