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. 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 30 #ifndef lint 31 #if 0 32 static char sccsid[] = "@(#)parse.c 8.1 (Berkeley) 6/6/93"; 33 #endif 34 #endif /* not lint */ 35 #include <sys/cdefs.h> 36 __FBSDID("$FreeBSD$"); 37 38 #include <sys/types.h> 39 40 #include <err.h> 41 #include <fcntl.h> 42 #include <stdio.h> 43 #include <stdlib.h> 44 #include <ctype.h> 45 #include <string.h> 46 #include "hexdump.h" 47 48 FU *endfu; /* format at end-of-data */ 49 50 void 51 addfile(const char *name) 52 { 53 unsigned char *p; 54 FILE *fp; 55 int ch; 56 char buf[2048 + 1]; 57 58 if ((fp = fopen(name, "r")) == NULL) 59 err(1, "%s", name); 60 while (fgets(buf, sizeof(buf), fp)) { 61 if (!(p = strchr(buf, '\n'))) { 62 warnx("line too long"); 63 while ((ch = getchar()) != '\n' && ch != EOF); 64 continue; 65 } 66 *p = '\0'; 67 for (p = buf; *p && isspace(*p); ++p); 68 if (!*p || *p == '#') 69 continue; 70 add(p); 71 } 72 (void)fclose(fp); 73 } 74 75 void 76 add(const char *fmt) 77 { 78 unsigned const char *p, *savep; 79 static FS **nextfs; 80 FS *tfs; 81 FU *tfu, **nextfu; 82 83 /* start new linked list of format units */ 84 if ((tfs = calloc(1, sizeof(FS))) == NULL) 85 err(1, NULL); 86 if (!fshead) 87 fshead = tfs; 88 else 89 *nextfs = tfs; 90 nextfs = &tfs->nextfs; 91 nextfu = &tfs->nextfu; 92 93 /* take the format string and break it up into format units */ 94 for (p = fmt;;) { 95 /* skip leading white space */ 96 for (; isspace(*p); ++p); 97 if (!*p) 98 break; 99 100 /* allocate a new format unit and link it in */ 101 if ((tfu = calloc(1, sizeof(FU))) == NULL) 102 err(1, NULL); 103 *nextfu = tfu; 104 nextfu = &tfu->nextfu; 105 tfu->reps = 1; 106 107 /* if leading digit, repetition count */ 108 if (isdigit(*p)) { 109 for (savep = p; isdigit(*p); ++p); 110 if (!isspace(*p) && *p != '/') 111 badfmt(fmt); 112 /* may overwrite either white space or slash */ 113 tfu->reps = atoi(savep); 114 tfu->flags = F_SETREP; 115 /* skip trailing white space */ 116 for (++p; isspace(*p); ++p); 117 } 118 119 /* skip slash and trailing white space */ 120 if (*p == '/') 121 while (isspace(*++p)); 122 123 /* byte count */ 124 if (isdigit(*p)) { 125 for (savep = p; isdigit(*p); ++p); 126 if (!isspace(*p)) 127 badfmt(fmt); 128 tfu->bcnt = atoi(savep); 129 /* skip trailing white space */ 130 for (++p; isspace(*p); ++p); 131 } 132 133 /* format */ 134 if (*p != '"') 135 badfmt(fmt); 136 for (savep = ++p; *p != '"';) 137 if (*p++ == 0) 138 badfmt(fmt); 139 if (!(tfu->fmt = malloc(p - savep + 1))) 140 err(1, NULL); 141 (void) strlcpy(tfu->fmt, savep, p - savep + 1); 142 escape(tfu->fmt); 143 p++; 144 } 145 } 146 147 static const char *spec = ".#-+ 0123456789"; 148 149 int 150 size(FS *fs) 151 { 152 FU *fu; 153 int bcnt, cursize; 154 unsigned char *fmt; 155 int prec; 156 157 /* figure out the data block size needed for each format unit */ 158 for (cursize = 0, fu = fs->nextfu; fu; fu = fu->nextfu) { 159 if (fu->bcnt) { 160 cursize += fu->bcnt * fu->reps; 161 continue; 162 } 163 for (bcnt = prec = 0, fmt = fu->fmt; *fmt; ++fmt) { 164 if (*fmt != '%') 165 continue; 166 /* 167 * skip any special chars -- save precision in 168 * case it's a %s format. 169 */ 170 while (strchr(spec + 1, *++fmt)); 171 if (*fmt == '.' && isdigit(*++fmt)) { 172 prec = atoi(fmt); 173 while (isdigit(*++fmt)); 174 } 175 switch(*fmt) { 176 case 'c': 177 bcnt += 1; 178 break; 179 case 'd': case 'i': case 'o': case 'u': 180 case 'x': case 'X': 181 bcnt += 4; 182 break; 183 case 'e': case 'E': case 'f': case 'g': case 'G': 184 bcnt += 8; 185 break; 186 case 's': 187 bcnt += prec; 188 break; 189 case '_': 190 switch(*++fmt) { 191 case 'c': case 'p': case 'u': 192 bcnt += 1; 193 break; 194 } 195 } 196 } 197 cursize += bcnt * fu->reps; 198 } 199 return (cursize); 200 } 201 202 void 203 rewrite(FS *fs) 204 { 205 enum { NOTOKAY, USEBCNT, USEPREC } sokay; 206 PR *pr, **nextpr; 207 FU *fu; 208 unsigned char *p1, *p2, *fmtp; 209 char savech, cs[3]; 210 int nconv, prec; 211 212 prec = 0; 213 214 for (fu = fs->nextfu; fu; fu = fu->nextfu) { 215 /* 216 * Break each format unit into print units; each conversion 217 * character gets its own. 218 */ 219 nextpr = &fu->nextpr; 220 for (nconv = 0, fmtp = fu->fmt; *fmtp; nextpr = &pr->nextpr) { 221 if ((pr = calloc(1, sizeof(PR))) == NULL) 222 err(1, NULL); 223 *nextpr = pr; 224 225 /* Skip preceding text and up to the next % sign. */ 226 for (p1 = fmtp; *p1 && *p1 != '%'; ++p1); 227 228 /* Only text in the string. */ 229 if (!*p1) { 230 pr->fmt = fmtp; 231 pr->flags = F_TEXT; 232 break; 233 } 234 235 /* 236 * Get precision for %s -- if have a byte count, don't 237 * need it. 238 */ 239 if (fu->bcnt) { 240 sokay = USEBCNT; 241 /* Skip to conversion character. */ 242 for (++p1; strchr(spec, *p1); ++p1); 243 } else { 244 /* Skip any special chars, field width. */ 245 while (strchr(spec + 1, *++p1)); 246 if (*p1 == '.' && isdigit(*++p1)) { 247 sokay = USEPREC; 248 prec = atoi(p1); 249 while (isdigit(*++p1)); 250 } else 251 sokay = NOTOKAY; 252 } 253 254 p2 = *p1 ? p1 + 1 : p1; /* Set end pointer -- make sure 255 * that it's non-NUL/-NULL first 256 * though. */ 257 cs[0] = *p1; /* Set conversion string. */ 258 cs[1] = '\0'; 259 260 /* 261 * Figure out the byte count for each conversion; 262 * rewrite the format as necessary, set up blank- 263 * padding for end of data. 264 */ 265 switch(cs[0]) { 266 case 'c': 267 pr->flags = F_CHAR; 268 switch(fu->bcnt) { 269 case 0: case 1: 270 pr->bcnt = 1; 271 break; 272 default: 273 p1[1] = '\0'; 274 badcnt(p1); 275 } 276 break; 277 case 'd': case 'i': 278 pr->flags = F_INT; 279 goto isint; 280 case 'o': case 'u': case 'x': case 'X': 281 pr->flags = F_UINT; 282 isint: cs[2] = '\0'; 283 cs[1] = cs[0]; 284 cs[0] = 'q'; 285 switch(fu->bcnt) { 286 case 0: case 4: 287 pr->bcnt = 4; 288 break; 289 case 1: 290 pr->bcnt = 1; 291 break; 292 case 2: 293 pr->bcnt = 2; 294 break; 295 default: 296 p1[1] = '\0'; 297 badcnt(p1); 298 } 299 break; 300 case 'e': case 'E': case 'f': case 'g': case 'G': 301 pr->flags = F_DBL; 302 switch(fu->bcnt) { 303 case 0: case 8: 304 pr->bcnt = 8; 305 break; 306 case 4: 307 pr->bcnt = 4; 308 break; 309 default: 310 if (fu->bcnt == sizeof(long double)) { 311 cs[2] = '\0'; 312 cs[1] = cs[0]; 313 cs[0] = 'L'; 314 pr->bcnt = sizeof(long double); 315 } else { 316 p1[1] = '\0'; 317 badcnt(p1); 318 } 319 } 320 break; 321 case 's': 322 pr->flags = F_STR; 323 switch(sokay) { 324 case NOTOKAY: 325 badsfmt(); 326 case USEBCNT: 327 pr->bcnt = fu->bcnt; 328 break; 329 case USEPREC: 330 pr->bcnt = prec; 331 break; 332 } 333 break; 334 case '_': 335 ++p2; 336 switch(p1[1]) { 337 case 'A': 338 endfu = fu; 339 fu->flags |= F_IGNORE; 340 /* FALLTHROUGH */ 341 case 'a': 342 pr->flags = F_ADDRESS; 343 ++p2; 344 switch(p1[2]) { 345 case 'd': case 'o': case'x': 346 cs[0] = 'q'; 347 cs[1] = p1[2]; 348 cs[2] = '\0'; 349 break; 350 default: 351 p1[3] = '\0'; 352 badconv(p1); 353 } 354 break; 355 case 'c': 356 pr->flags = F_C; 357 /* cs[0] = 'c'; set in conv_c */ 358 goto isint2; 359 case 'p': 360 pr->flags = F_P; 361 cs[0] = 'c'; 362 goto isint2; 363 case 'u': 364 pr->flags = F_U; 365 /* cs[0] = 'c'; set in conv_u */ 366 isint2: switch(fu->bcnt) { 367 case 0: case 1: 368 pr->bcnt = 1; 369 break; 370 default: 371 p1[2] = '\0'; 372 badcnt(p1); 373 } 374 break; 375 default: 376 p1[2] = '\0'; 377 badconv(p1); 378 } 379 break; 380 default: 381 p1[1] = '\0'; 382 badconv(p1); 383 } 384 385 /* 386 * Copy to PR format string, set conversion character 387 * pointer, update original. 388 */ 389 savech = *p2; 390 p1[0] = '\0'; 391 if (asprintf(&pr->fmt, "%s%s", fmtp, cs) == -1) 392 err(1, NULL); 393 *p2 = savech; 394 pr->cchar = pr->fmt + (p1 - fmtp); 395 fmtp = p2; 396 397 /* Only one conversion character if byte count. */ 398 if (!(pr->flags&F_ADDRESS) && fu->bcnt && nconv++) 399 errx(1, "byte count with multiple conversion characters"); 400 } 401 /* 402 * If format unit byte count not specified, figure it out 403 * so can adjust rep count later. 404 */ 405 if (!fu->bcnt) 406 for (pr = fu->nextpr; pr; pr = pr->nextpr) 407 fu->bcnt += pr->bcnt; 408 } 409 /* 410 * If the format string interprets any data at all, and it's 411 * not the same as the blocksize, and its last format unit 412 * interprets any data at all, and has no iteration count, 413 * repeat it as necessary. 414 * 415 * If, rep count is greater than 1, no trailing whitespace 416 * gets output from the last iteration of the format unit. 417 */ 418 for (fu = fs->nextfu; fu; fu = fu->nextfu) { 419 if (!fu->nextfu && fs->bcnt < blocksize && 420 !(fu->flags&F_SETREP) && fu->bcnt) 421 fu->reps += (blocksize - fs->bcnt) / fu->bcnt; 422 if (fu->reps > 1) { 423 for (pr = fu->nextpr;; pr = pr->nextpr) 424 if (!pr->nextpr) 425 break; 426 for (p1 = pr->fmt, p2 = NULL; *p1; ++p1) 427 p2 = isspace(*p1) ? p1 : NULL; 428 if (p2) 429 pr->nospace = p2; 430 } 431 } 432 #ifdef DEBUG 433 for (fu = fs->nextfu; fu; fu = fu->nextfu) { 434 (void)printf("fmt:"); 435 for (pr = fu->nextpr; pr; pr = pr->nextpr) 436 (void)printf(" {%s}", pr->fmt); 437 (void)printf("\n"); 438 } 439 #endif 440 } 441 442 void 443 escape(char *p1) 444 { 445 char *p2; 446 447 /* alphabetic escape sequences have to be done in place */ 448 for (p2 = p1;; p1++, p2++) { 449 if (*p1 == '\\') { 450 p1++; 451 switch(*p1) { 452 case '\0': 453 *p2 = '\\'; 454 *++p2 = '\0'; 455 return; 456 case 'a': 457 /* *p2 = '\a'; */ 458 *p2 = '\007'; 459 break; 460 case 'b': 461 *p2 = '\b'; 462 break; 463 case 'f': 464 *p2 = '\f'; 465 break; 466 case 'n': 467 *p2 = '\n'; 468 break; 469 case 'r': 470 *p2 = '\r'; 471 break; 472 case 't': 473 *p2 = '\t'; 474 break; 475 case 'v': 476 *p2 = '\v'; 477 break; 478 default: 479 *p2 = *p1; 480 break; 481 } 482 } else { 483 *p2 = *p1; 484 if (*p1 == '\0') 485 return; 486 } 487 } 488 } 489 490 void 491 badcnt(const char *s) 492 { 493 errx(1, "%s: bad byte count", s); 494 } 495 496 void 497 badsfmt(void) 498 { 499 errx(1, "%%s: requires a precision or a byte count"); 500 } 501 502 void 503 badfmt(const char *fmt) 504 { 505 errx(1, "\"%s\": bad format", fmt); 506 } 507 508 void 509 badconv(const char *ch) 510 { 511 errx(1, "%%%s: bad conversion character", ch); 512 } 513