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: src/usr.bin/hexdump/odsyntax.c,v 1.16 2002/09/04 23:29:01 dwmalone Exp $");
  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 _n[] = "%_n", 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 = _n; /* mimic regular output */
  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                         else if (*end == 'g')
 149                                 skip *= 1073741824;
 150                         else if (*end != '\0')
 151                                 skip = -1;
 152                         if (errno != 0 || skip < 0 || strlen(end) > 1)
 153                                 errx(1, "%s: invalid skip amount", optarg);
 154                         break;
 155                 case 'N':
 156                         if ((length = atoi(optarg)) <= 0)
 157                                 errx(1, "%s: invalid length", optarg);
 158                         break;
 159                 case 'O':
 160                         odformat("o4");
 161                         break;
 162                 case 's':
 163                         odformat("d2");
 164                         break;
 165                 case 't':
 166                         odformat(optarg);
 167                         break;
 168                 case 'v':
 169                         vflag = ALL;
 170                         break;
 171                 case '?':
 172                 default:
 173                         odusage();
 174                 }
 175
 176         if (fshead->nextfs->nextfs == NULL)
 177                 odformat("oS");
 178
 179         argc -= optind;
 180         *argvp += optind;
 181
 182         if (argc)
 183                 odoffset(argc, argvp);
 184 }
 185
 186 static void
 187 odusage(void)
 188 {
 189
 190         fprintf(stderr,
 191 "usage: od [-aBbcDdeFfHhIiLlOosvXx] [-A base] [-j skip] [-N length] [-t type]\n");
 192         fprintf(stderr,
 193 "          [[+]offset[.][Bb]] [file ...]\n");
 194         exit(1);
 195 }
 196
 197 static void
 198 odoffset(int argc, char ***argvp)
 199 {
 200         unsigned char *p, *q, *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 = (unsigned char *)(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         q = p;
 246         /* if terminates with a '.', base is decimal */
 247         if (*q == '.') {
 248                 if (base)
 249                         return;
 250                 base = 10;
 251                 q++;
 252         }
 253
 254         skip = strtoll((const char *)num, (char **)&end, base ? base : 8);
 255
 256         /* if end isn't the same as p, we got a non-octal digit */
 257         if (end != p) {
 258                 skip = 0;
 259                 return;
 260         }
 261
 262         if (*q) {
 263                 if (*q == 'B') {
 264                         skip *= 1024;
 265                         ++p;
 266                 } else if (*q == 'b') {
 267                         skip *= 512;
 268                         ++q;
 269                 }
 270         }
 271
 272         if (*q) {
 273                 skip = 0;
 274                 return;
 275         }
 276
 277         /*
 278          * If the offset uses a non-octal base, the base of the offset
 279          * is changed as well.  This isn't pretty, but it's easy.
 280          */
 281         if (base == 16) {
 282                 fshead->nextfu->fmt[TYPE_OFFSET] = 'x';
 283                 fshead->nextfs->nextfu->fmt[TYPE_OFFSET] = 'x';
 284         } else if (base == 10) {
 285                 fshead->nextfu->fmt[TYPE_OFFSET] = 'd';
 286                 fshead->nextfs->nextfu->fmt[TYPE_OFFSET] = 'd';
 287         }
 288
 289         /* Terminate file list. */
 290         (*argvp)[1] = NULL;
 291 }
 292
 293 static void
 294 odformat(const char *fmt)
 295 {
 296         char fchar;
 297
 298         while (*fmt != '\0') {
 299                 switch ((fchar = *fmt++)) {
 300                 case 'a':
 301                         odadd("16/1 \"%3_u \" \"\\n\"");
 302                         break;
 303                 case 'c':
 304                         odadd("16/1 \"%3_c \" \"\\n\"");
 305                         break;
 306                 case 'o': case 'u': case 'd': case 'x':
 307                         fmt = odformatint(fchar, fmt);
 308                         break;
 309                 case 'f':
 310                         fmt = odformatfp(fchar, fmt);
 311                         break;
 312                 default:
 313                         errx(1, "%c: unrecognised format character", fchar);
 314                 }
 315         }
 316 }
 317
 318 static const char *
 319 odformatfp(char fchar __unused, const char *fmt)
 320 {
 321         size_t isize;
 322         int digits;
 323         char *end, *hdfmt;
 324
 325         isize = sizeof(double);
 326         switch (*fmt) {
 327         case 'F':
 328                 isize = sizeof(float);
 329                 fmt++;
 330                 break;
 331         case 'D':
 332                 isize = sizeof(double);
 333                 fmt++;
 334                 break;
 335         case 'L':
 336                 isize = sizeof(long double);
 337                 fmt++;
 338                 break;
 339         default:
 340                 if (isdigit((unsigned char)*fmt)) {
 341                         errno = 0;
 342                         isize = (size_t)strtoul(fmt, &end, 10);
 343                         if (errno != 0 || isize == 0)
 344                                 errx(1, "%s: invalid size", fmt);
 345                         fmt = (const char *)end;
 346                 }
 347         }
 348         switch (isize) {
 349         case sizeof(float):
 350                 digits = FLT_DIG;
 351                 break;
 352         case sizeof(double):
 353                 digits = DBL_DIG;
 354                 break;
 355         default:
 356                 if (isize == sizeof(long double))
 357                         digits = LDBL_DIG;
 358                 else
 359                         errx(1, "unsupported floating point size %lu",
 360                             (u_long)isize);
 361         }
 362
 363         asprintf(&hdfmt, "%lu/%lu \" %%%d.%de \" \"\\n\"",
 364             16UL / (u_long)isize, (u_long)isize, digits + 8, digits);
 365         if (hdfmt == NULL)
 366                 err(1, NULL);
 367         odadd(hdfmt);
 368         free(hdfmt);
 369
 370         return (fmt);
 371 }
 372
 373 static const char *
 374 odformatint(char fchar, const char *fmt)
 375 {
 376         unsigned long long n;
 377         size_t isize;
 378         int digits;
 379         char *end, *hdfmt;
 380
 381         isize = sizeof(int);
 382         switch (*fmt) {
 383         case 'C':
 384                 isize = sizeof(char);
 385                 fmt++;
 386                 break;
 387         case 'I':
 388                 isize = sizeof(int);
 389                 fmt++;
 390                 break;
 391         case 'L':
 392                 isize = sizeof(long);
 393                 fmt++;
 394                 break;
 395         case 'S':
 396                 isize = sizeof(short);
 397                 fmt++;
 398                 break;
 399         default:
 400                 if (isdigit((unsigned char)*fmt)) {
 401                         errno = 0;
 402                         isize = (size_t)strtoul(fmt, &end, 10);
 403                         if (errno != 0 || isize == 0)
 404                                 errx(1, "%s: invalid size", fmt);
 405                         if (isize != sizeof(char) && isize != sizeof(short) &&
 406                             isize != sizeof(int) && isize != sizeof(long))
 407                                 errx(1, "unsupported int size %lu",
 408                                     (u_long)isize);
 409                         fmt = (const char *)end;
 410                 }
 411         }
 412
 413         /*
 414          * Calculate the maximum number of digits we need to
 415          * fit the number. Overestimate for decimal with log
 416          * base 8. We need one extra space for signed numbers
 417          * to store the sign.
 418          */
 419         n = (1ULL << (8 * isize)) - 1;
 420         digits = 0;
 421         while (n != 0) {
 422                 digits++;
 423                 n >>= (fchar == 'x') ? 4 : 3;
 424         }
 425         if (fchar == 'd')
 426                 digits++;
 427         asprintf(&hdfmt, "%lu/%lu \"%*s%%%s%d%c\" \"\\n\"",
 428             16UL / (u_long)isize, (u_long)isize, (int)(4 * isize - digits),
 429             "", (fchar == 'd' || fchar == 'u') ? "" : "0", digits, fchar);
 430         if (hdfmt == NULL)
 431                 err(1, NULL);
 432         odadd(hdfmt);
 433         free(hdfmt);
 434
 435         return (fmt);
 436 }
 437
 438 static void
 439 odadd(const char *fmt)
 440 {
 441         static int needpad;
 442
 443         if (needpad)
 444                 add("\""PADDING"\"");
 445         add(fmt);
 446         needpad = 1;
 447 }