commands/hexdump/odsyntax.c

   1 /*      $NetBSD: odsyntax.c,v 1.26 2010/02/09 14:06:37 drochner Exp $   */
   2
   3 /*-
   4  * Copyright (c) 1990, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #if HAVE_NBTOOL_CONFIG_H
  33 #include "nbtool_config.h"
  34 #endif
  35
  36 #include <sys/cdefs.h>
  37 #if 0
  38 #if !defined(lint)
  39 #if 0
  40 static char sccsid[] = "@(#)odsyntax.c  8.2 (Berkeley) 5/4/95";
  41 #else
  42 __RCSID("$NetBSD: odsyntax.c,v 1.26 2010/02/09 14:06:37 drochner Exp $");
  43 #endif
  44 #endif /* not lint */
  45 #endif
  46
  47 #include <sys/types.h>
  48
  49 #include <ctype.h>
  50 #include <err.h>
  51 #include <stdio.h>
  52 #include <stdlib.h>
  53 #include <unistd.h>
  54 #include <util.h>
  55
  56 #include "hexdump.h"
  57
  58 #define PADDING "         "
  59
  60 struct odformat {
  61         char type;
  62         int nbytes;
  63         char const *format;
  64         int minwidth;
  65 };
  66
  67 struct odaddrformat {
  68         char type;
  69         char const *format1;
  70         char const *format2;
  71 };
  72
  73 int odmode;
  74
  75 static void odoffset(int, char ***);
  76 static void posixtypes(char const *);
  77
  78 void
  79 odsyntax(int argc, char ***argvp)
  80 {
  81         static char empty[] = "", padding[] = PADDING;
  82         int ch;
  83         char *p, **argv;
  84
  85 #define TYPE_OFFSET 7
  86         add("\"%07.7_Ao\n\"");
  87         add("\"%07.7_ao  \"");
  88
  89         odmode = 1;
  90         argv = *argvp;
  91         while ((ch = getopt(argc, argv,
  92             "A:aBbcDdeFfHhIij:LlN:Oot:vXx")) != -1)
  93                 switch (ch) {
  94                 case 'A':
  95                         switch (*optarg) {
  96                         case 'd': case 'o': case 'x':
  97                                 fshead->nextfu->fmt[TYPE_OFFSET] = *optarg;
  98                                 fshead->nextfs->nextfu->fmt[TYPE_OFFSET] =
  99                                         *optarg;
 100                                 break;
 101                         case 'n':
 102                                 fshead->nextfu->fmt = empty;
 103                                 fshead->nextfs->nextfu->fmt = padding;
 104                                 break;
 105                         default:
 106                                 errx(1, "%s: invalid address base", optarg);
 107                         }
 108                         break;
 109                 case 'a':
 110                         posixtypes("a");
 111                         break;
 112                 case 'B':
 113                 case 'o':
 114                         posixtypes("o2");
 115                         break;
 116                 case 'b':
 117                         posixtypes("o1");
 118                         break;
 119                 case 'c':
 120                         posixtypes("c");
 121                         break;
 122                 case 'd':
 123                         posixtypes("u2");
 124                         break;
 125                 case 'D':
 126                         posixtypes("u4");
 127                         break;
 128                 case 'e':               /* undocumented in od */
 129                 case 'F':
 130                         posixtypes("f8");
 131                         break;
 132                 case 'f':
 133                         posixtypes("f4");
 134                         break;
 135                 case 'H':
 136                 case 'X':
 137                         posixtypes("x4");
 138                         break;
 139                 case 'h':
 140                 case 'x':
 141                         posixtypes("x2");
 142                         break;
 143                 case 'I':
 144                 case 'L':
 145                 case 'l':
 146                         posixtypes("d4");
 147                         break;
 148                 case 'i':
 149                         posixtypes("d2");
 150                         break;
 151                 case 'j':
 152                         if ((skip = strtol(optarg, &p, 0)) < 0)
 153                                 errx(1, "%s: bad skip value", optarg);
 154                         switch(*p) {
 155                         case 'b':
 156                                 skip *= 512;
 157                                 break;
 158                         case 'k':
 159                                 skip *= 1024;
 160                                 break;
 161                         case 'm':
 162                                 skip *= 1048576;
 163                                 break;
 164                         }
 165                         break;
 166                 case 'N':
 167                         if ((length = atoi(optarg)) < 0)
 168                                 errx(1, "%s: bad length value", optarg);
 169                         break;
 170                 case 'O':
 171                         posixtypes("o4");
 172                         break;
 173                 case 't':
 174                         posixtypes(optarg);
 175                         break;
 176                 case 'v':
 177                         vflag = ALL;
 178                         break;
 179                 case '?':
 180                 default:
 181                         usage();
 182                 }
 183
 184         if (fshead->nextfs->nextfs == NULL)
 185                 posixtypes("oS");
 186
 187         argc -= optind;
 188         *argvp += optind;
 189
 190         if (argc)
 191                 odoffset(argc, argvp);
 192 }
 193
 194 /* formats used for -t */
 195
 196 static const struct odformat odftab[] = {
 197         { 'a', 1, "%3_u",  4 },
 198         { 'c', 1, "%3_c",  4 },
 199         { 'd', 1, "%4d",   5 },
 200         { 'd', 2, "%6d",   6 },
 201         { 'd', 4, "%11d", 11 },
 202         { 'd', 8, "%20d", 20 },
 203         { 'o', 1, "%03o",  4 },
 204         { 'o', 2, "%06o",  7 },
 205         { 'o', 4, "%011o", 12 },
 206         { 'o', 8, "%022o", 23 },
 207         { 'u', 1, "%03u" , 4 },
 208         { 'u', 2, "%05u" , 6 },
 209         { 'u', 4, "%010u", 11 },
 210         { 'u', 8, "%020u", 21 },
 211         { 'x', 1, "%02x",  3 },
 212         { 'x', 2, "%04x",  5 },
 213         { 'x', 4, "%08x",  9 },
 214         { 'x', 8, "%016x", 17 },
 215         { 'f', 4, "%14.7e",  15 },
 216         { 'f', 8, "%21.14e", 22 },
 217         { 0, 0, NULL, 0 }
 218 };
 219
 220 /*
 221  * Interpret a POSIX-style -t argument.
 222  */
 223 static void
 224 posixtypes(char const *type_string)
 225 {
 226         int nbytes = 0;
 227         char *fmt, type, *tmp;
 228         struct odformat const *odf;
 229
 230         while (*type_string) {
 231                 switch ((type = *type_string++)) {
 232                 case 'a':
 233                 case 'c':
 234                         nbytes = 1;
 235                         break;
 236                 case 'f':
 237                         if (isupper((unsigned char)*type_string)) {
 238                                 switch(*type_string) {
 239                                 case 'F':
 240                                         nbytes = sizeof(float);
 241                                         break;
 242                                 case 'D':
 243                                         nbytes = sizeof(double);
 244                                         break;
 245                                 case 'L':
 246                                         nbytes = sizeof(long double);
 247                                         break;
 248                                 default:
 249                                         warnx("Bad type-size qualifier '%c'",
 250                                             *type_string);
 251                                         usage();
 252                                 }
 253                                 type_string++;
 254                         } else if (isdigit((unsigned char)*type_string)) {
 255                                 nbytes = strtol(type_string, &tmp, 10);
 256                                 type_string = tmp;
 257                         } else
 258                                 nbytes = 8;
 259                         break;
 260                 case 'd':
 261                 case 'o':
 262                 case 'u':
 263                 case 'x':
 264                         if (isupper((unsigned char)*type_string)) {
 265                                 switch(*type_string) {
 266                                 case 'C':
 267                                         nbytes = sizeof(char);
 268                                         break;
 269                                 case 'S':
 270                                         nbytes = sizeof(short);
 271                                         break;
 272                                 case 'I':
 273                                         nbytes = sizeof(int);
 274                                         break;
 275                                 case 'L':
 276                                         nbytes = sizeof(long);
 277                                         break;
 278                                 default:
 279                                         warnx("Bad type-size qualifier '%c'",
 280                                             *type_string);
 281                                         usage();
 282                                 }
 283                                 type_string++;
 284                         } else if (isdigit((unsigned char)*type_string)) {
 285                                 nbytes = strtol(type_string, &tmp, 10);
 286                                 type_string = tmp;
 287                         } else
 288                                 nbytes = 4;
 289                         break;
 290                 default:
 291                         usage();
 292                 }
 293                 for (odf = odftab; odf->type != 0; odf++)
 294                         if (odf->type == type && odf->nbytes == nbytes)
 295                                 break;
 296                 if (odf->type == 0)
 297                         errx(1, "%c%d: format not supported", type, nbytes);
 298                 (void)easprintf(&fmt, "%d/%d  \"%*s%s \" \"\\n\"",
 299                     16 / nbytes, nbytes,
 300                     4 * nbytes - odf->minwidth, "", odf->format);
 301                 add(fmt);
 302         }
 303 }
 304
 305 static void
 306 odoffset(int argc, char ***argvp)
 307 {
 308         char *num, *p;
 309         int base;
 310         char *end;
 311
 312         /*
 313          * The offset syntax of od(1) was genuinely bizarre.  First, if
 314          * it started with a plus it had to be an offset.  Otherwise, if
 315          * there were at least two arguments, a number or lower-case 'x'
 316          * followed by a number makes it an offset.  By default it was
 317          * octal; if it started with 'x' or '0x' it was hex.  If it ended
 318          * in a '.', it was decimal.  If a 'b' or 'B' was appended, it
 319          * multiplied the number by 512 or 1024 byte units.  There was
 320          * no way to assign a block count to a hex offset.
 321          *
 322          * We assume it's a file if the offset is bad.
 323          */
 324         p = argc == 1 ? (*argvp)[0] : (*argvp)[1];
 325         if (!p)
 326                 return;
 327
 328         if (*p != '+' && (argc < 2 ||
 329             (!isdigit((unsigned char)p[0]) &&
 330             (p[0] != 'x' || !isxdigit((unsigned char)p[1])))))
 331                 return;
 332
 333         base = 0;
 334         /*
 335          * skip over leading '+', 'x[0-9a-fA-f]' or '0x', and
 336          * set base.
 337          */
 338         if (p[0] == '+')
 339                 ++p;
 340         if (p[0] == 'x' && isxdigit((unsigned char)p[1])) {
 341                 ++p;
 342                 base = 16;
 343         } else if (p[0] == '0' && p[1] == 'x') {
 344                 p += 2;
 345                 base = 16;
 346         }
 347
 348         /* skip over the number */
 349         if (base == 16)
 350                 for (num = p; isxdigit((unsigned char)*p); ++p);
 351         else
 352                 for (num = p; isdigit((unsigned char)*p); ++p);
 353
 354         /* check for no number */
 355         if (num == p)
 356                 return;
 357
 358         /* if terminates with a '.', base is decimal */
 359         if (*p == '.') {
 360                 if (base)
 361                         return;
 362                 base = 10;
 363         }
 364
 365         skip = strtol(num, &end, base ? base : 8);
 366
 367         /* if end isn't the same as p, we got a non-octal digit */
 368         if (end != p) {
 369                 skip = 0;
 370                 return;
 371         }
 372
 373         if (*p) {
 374                 if (*p == 'B') {
 375                         skip *= 1024;
 376                         ++p;
 377                 } else if (*p == 'b') {
 378                         skip *= 512;
 379                         ++p;
 380                 }
 381         }
 382         if (*p) {
 383                 skip = 0;
 384                 return;
 385         }
 386         /*
 387          * If the offset uses a non-octal base, the base of the offset
 388          * is changed as well.  This isn't pretty, but it's easy.
 389          */
 390         if (base == 16) {
 391                 fshead->nextfu->fmt[TYPE_OFFSET] = 'x';
 392                 fshead->nextfs->nextfu->fmt[TYPE_OFFSET] = 'x';
 393         } else if (base == 10) {
 394                 fshead->nextfu->fmt[TYPE_OFFSET] = 'd';
 395                 fshead->nextfs->nextfu->fmt[TYPE_OFFSET] = 'd';
 396         }
 397
 398         /* Terminate file list. */
 399         (*argvp)[1] = NULL;
 400 }