1 /* 2 * Copyright (c) 1989, 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[] = "@(#)display.c 8.1 (Berkeley) 6/6/93"; 37 #endif 38 #endif /* not lint */ 39 #include <sys/cdefs.h> 40 __FBSDID("$FreeBSD$"); 41 42 #include <sys/param.h> 43 #include <sys/stat.h> 44 45 #include <ctype.h> 46 #include <err.h> 47 #include <stdio.h> 48 #include <stdlib.h> 49 #include <string.h> 50 #include <unistd.h> 51 #include "hexdump.h" 52 53 enum _vflag vflag = FIRST; 54 55 static off_t address; /* address/offset in stream */ 56 static off_t eaddress; /* end address */ 57 58 static __inline void print(PR *, u_char *); 59 60 void 61 display() 62 { 63 extern FU *endfu; 64 register FS *fs; 65 register FU *fu; 66 register PR *pr; 67 register int cnt; 68 register u_char *bp; 69 off_t saveaddress; 70 u_char savech, *savebp; 71 72 while ((bp = get())) 73 for (fs = fshead, savebp = bp, saveaddress = address; fs; 74 fs = fs->nextfs, bp = savebp, address = saveaddress) 75 for (fu = fs->nextfu; fu; fu = fu->nextfu) { 76 if (fu->flags&F_IGNORE) 77 break; 78 for (cnt = fu->reps; cnt; --cnt) 79 for (pr = fu->nextpr; pr; address += pr->bcnt, 80 bp += pr->bcnt, pr = pr->nextpr) { 81 if (eaddress && address >= eaddress && 82 !(pr->flags & (F_TEXT|F_BPAD))) 83 bpad(pr); 84 if (cnt == 1 && pr->nospace) { 85 savech = *pr->nospace; 86 *pr->nospace = '\0'; 87 } 88 print(pr, bp); 89 if (cnt == 1 && pr->nospace) 90 *pr->nospace = savech; 91 } 92 } 93 if (endfu) { 94 /* 95 * If eaddress not set, error or file size was multiple of 96 * blocksize, and no partial block ever found. 97 */ 98 if (!eaddress) { 99 if (!address) 100 return; 101 eaddress = address; 102 } 103 for (pr = endfu->nextpr; pr; pr = pr->nextpr) 104 switch(pr->flags) { 105 case F_ADDRESS: 106 (void)printf(pr->fmt, (quad_t)eaddress); 107 break; 108 case F_TEXT: 109 (void)printf("%s", pr->fmt); 110 break; 111 } 112 } 113 } 114 115 static __inline void 116 print(pr, bp) 117 PR *pr; 118 u_char *bp; 119 { 120 long double ldbl; 121 double f8; 122 float f4; 123 int16_t s2; 124 int8_t s8; 125 int32_t s4; 126 u_int16_t u2; 127 u_int32_t u4; 128 u_int64_t u8; 129 130 switch(pr->flags) { 131 case F_ADDRESS: 132 (void)printf(pr->fmt, (quad_t)address); 133 break; 134 case F_BPAD: 135 (void)printf(pr->fmt, ""); 136 break; 137 case F_C: 138 conv_c(pr, bp); 139 break; 140 case F_CHAR: 141 (void)printf(pr->fmt, *bp); 142 break; 143 case F_DBL: 144 switch(pr->bcnt) { 145 case 4: 146 bcopy(bp, &f4, sizeof(f4)); 147 (void)printf(pr->fmt, f4); 148 break; 149 case 8: 150 bcopy(bp, &f8, sizeof(f8)); 151 (void)printf(pr->fmt, f8); 152 break; 153 default: 154 if (pr->bcnt == sizeof(long double)) { 155 bcopy(bp, &ldbl, sizeof(ldbl)); 156 (void)printf(pr->fmt, ldbl); 157 } 158 break; 159 } 160 break; 161 case F_INT: 162 switch(pr->bcnt) { 163 case 1: 164 (void)printf(pr->fmt, (quad_t)(signed char)*bp); 165 break; 166 case 2: 167 bcopy(bp, &s2, sizeof(s2)); 168 (void)printf(pr->fmt, (quad_t)s2); 169 break; 170 case 4: 171 bcopy(bp, &s4, sizeof(s4)); 172 (void)printf(pr->fmt, (quad_t)s4); 173 break; 174 case 8: 175 bcopy(bp, &s8, sizeof(s8)); 176 (void)printf(pr->fmt, s8); 177 break; 178 } 179 break; 180 case F_P: 181 (void)printf(pr->fmt, isprint(*bp) ? *bp : '.'); 182 break; 183 case F_STR: 184 (void)printf(pr->fmt, (char *)bp); 185 break; 186 case F_TEXT: 187 (void)printf("%s", pr->fmt); 188 break; 189 case F_U: 190 conv_u(pr, bp); 191 break; 192 case F_UINT: 193 switch(pr->bcnt) { 194 case 1: 195 (void)printf(pr->fmt, (u_quad_t)*bp); 196 break; 197 case 2: 198 bcopy(bp, &u2, sizeof(u2)); 199 (void)printf(pr->fmt, (u_quad_t)u2); 200 break; 201 case 4: 202 bcopy(bp, &u4, sizeof(u4)); 203 (void)printf(pr->fmt, (u_quad_t)u4); 204 break; 205 case 8: 206 bcopy(bp, &u8, sizeof(u8)); 207 (void)printf(pr->fmt, u8); 208 break; 209 } 210 break; 211 } 212 } 213 214 void 215 bpad(pr) 216 PR *pr; 217 { 218 static char const *spec = " -0+#"; 219 register char *p1, *p2; 220 221 /* 222 * Remove all conversion flags; '-' is the only one valid 223 * with %s, and it's not useful here. 224 */ 225 pr->flags = F_BPAD; 226 pr->cchar[0] = 's'; 227 pr->cchar[1] = '\0'; 228 for (p1 = pr->fmt; *p1 != '%'; ++p1); 229 for (p2 = ++p1; *p1 && index(spec, *p1); ++p1); 230 while ((*p2++ = *p1++)); 231 } 232 233 static char **_argv; 234 235 u_char * 236 get() 237 { 238 static int ateof = 1; 239 static u_char *curp, *savp; 240 register int n; 241 int need, nread; 242 int valid_save = 0; 243 u_char *tmpp; 244 245 if (!curp) { 246 if ((curp = calloc(1, blocksize)) == NULL) 247 err(1, NULL); 248 if ((savp = calloc(1, blocksize)) == NULL) 249 err(1, NULL); 250 } else { 251 tmpp = curp; 252 curp = savp; 253 savp = tmpp; 254 address += blocksize; 255 valid_save = 1; 256 } 257 for (need = blocksize, nread = 0;;) { 258 /* 259 * if read the right number of bytes, or at EOF for one file, 260 * and no other files are available, zero-pad the rest of the 261 * block and set the end flag. 262 */ 263 if (!length || (ateof && !next((char **)NULL))) { 264 if (odmode && address < skip) 265 errx(1, "cannot skip past end of input"); 266 if (need == blocksize) 267 return((u_char *)NULL); 268 if (vflag != ALL && 269 valid_save && 270 bcmp(curp, savp, nread) == 0) { 271 if (vflag != DUP) 272 (void)printf("*\n"); 273 return((u_char *)NULL); 274 } 275 bzero((char *)curp + nread, need); 276 eaddress = address + nread; 277 return(curp); 278 } 279 n = fread((char *)curp + nread, sizeof(u_char), 280 length == -1 ? need : MIN(length, need), stdin); 281 if (!n) { 282 if (ferror(stdin)) 283 warn("%s", _argv[-1]); 284 ateof = 1; 285 continue; 286 } 287 ateof = 0; 288 if (length != -1) 289 length -= n; 290 if (!(need -= n)) { 291 if (vflag == ALL || vflag == FIRST || 292 valid_save == 0 || 293 bcmp(curp, savp, blocksize) != 0) { 294 if (vflag == DUP || vflag == FIRST) 295 vflag = WAIT; 296 return(curp); 297 } 298 if (vflag == WAIT) 299 (void)printf("*\n"); 300 vflag = DUP; 301 address += blocksize; 302 need = blocksize; 303 nread = 0; 304 } 305 else 306 nread += n; 307 } 308 } 309 310 int 311 next(argv) 312 char **argv; 313 { 314 extern int exitval; 315 static int done; 316 int statok; 317 318 if (argv) { 319 _argv = argv; 320 return(1); 321 } 322 for (;;) { 323 if (*_argv) { 324 if (!(freopen(*_argv, "r", stdin))) { 325 warn("%s", *_argv); 326 exitval = 1; 327 ++_argv; 328 continue; 329 } 330 statok = done = 1; 331 } else { 332 if (done++) 333 return(0); 334 statok = 0; 335 } 336 if (skip) 337 doskip(statok ? *_argv : "stdin", statok); 338 if (*_argv) 339 ++_argv; 340 if (!skip) 341 return(1); 342 } 343 /* NOTREACHED */ 344 } 345 346 void 347 doskip(fname, statok) 348 const char *fname; 349 int statok; 350 { 351 register int cnt; 352 struct stat sb; 353 354 if (statok) { 355 if (fstat(fileno(stdin), &sb)) 356 err(1, "%s", fname); 357 if (S_ISREG(sb.st_mode) && skip >= sb.st_size) { 358 address += sb.st_size; 359 skip -= sb.st_size; 360 return; 361 } 362 } 363 if (S_ISREG(sb.st_mode)) { 364 if (fseeko(stdin, skip, SEEK_SET)) 365 err(1, "%s", fname); 366 address += skip; 367 skip = 0; 368 } else { 369 for (cnt = 0; cnt < skip; ++cnt) 370 if (getchar() == EOF) 371 break; 372 address += cnt; 373 skip -= cnt; 374 } 375 } 376