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 * 4. 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 size_t len; 212 213 prec = 0; 214 215 for (fu = fs->nextfu; fu; fu = fu->nextfu) { 216 /* 217 * Break each format unit into print units; each conversion 218 * character gets its own. 219 */ 220 nextpr = &fu->nextpr; 221 for (nconv = 0, fmtp = fu->fmt; *fmtp; nextpr = &pr->nextpr) { 222 if ((pr = calloc(1, sizeof(PR))) == NULL) 223 err(1, NULL); 224 *nextpr = pr; 225 226 /* Skip preceding text and up to the next % sign. */ 227 for (p1 = fmtp; *p1 && *p1 != '%'; ++p1); 228 229 /* Only text in the string. */ 230 if (!*p1) { 231 pr->fmt = fmtp; 232 pr->flags = F_TEXT; 233 break; 234 } 235 236 /* 237 * Get precision for %s -- if have a byte count, don't 238 * need it. 239 */ 240 if (fu->bcnt) { 241 sokay = USEBCNT; 242 /* Skip to conversion character. */ 243 for (++p1; strchr(spec, *p1); ++p1); 244 } else { 245 /* Skip any special chars, field width. */ 246 while (strchr(spec + 1, *++p1)); 247 if (*p1 == '.' && isdigit(*++p1)) { 248 sokay = USEPREC; 249 prec = atoi(p1); 250 while (isdigit(*++p1)); 251 } else 252 sokay = NOTOKAY; 253 } 254 255 p2 = *p1 ? p1 + 1 : p1; /* Set end pointer -- make sure 256 * that it's non-NUL/-NULL first 257 * though. */ 258 cs[0] = *p1; /* Set conversion string. */ 259 cs[1] = '\0'; 260 261 /* 262 * Figure out the byte count for each conversion; 263 * rewrite the format as necessary, set up blank- 264 * padding for end of data. 265 */ 266 switch(cs[0]) { 267 case 'c': 268 pr->flags = F_CHAR; 269 switch(fu->bcnt) { 270 case 0: case 1: 271 pr->bcnt = 1; 272 break; 273 default: 274 p1[1] = '\0'; 275 badcnt(p1); 276 } 277 break; 278 case 'd': case 'i': 279 pr->flags = F_INT; 280 goto isint; 281 case 'o': case 'u': case 'x': case 'X': 282 pr->flags = F_UINT; 283 isint: cs[2] = '\0'; 284 cs[1] = cs[0]; 285 cs[0] = 'q'; 286 switch(fu->bcnt) { 287 case 0: case 4: 288 pr->bcnt = 4; 289 break; 290 case 1: 291 pr->bcnt = 1; 292 break; 293 case 2: 294 pr->bcnt = 2; 295 break; 296 default: 297 p1[1] = '\0'; 298 badcnt(p1); 299 } 300 break; 301 case 'e': case 'E': case 'f': case 'g': case 'G': 302 pr->flags = F_DBL; 303 switch(fu->bcnt) { 304 case 0: case 8: 305 pr->bcnt = 8; 306 break; 307 case 4: 308 pr->bcnt = 4; 309 break; 310 default: 311 if (fu->bcnt == sizeof(long double)) { 312 cs[2] = '\0'; 313 cs[1] = cs[0]; 314 cs[0] = 'L'; 315 pr->bcnt = sizeof(long double); 316 } else { 317 p1[1] = '\0'; 318 badcnt(p1); 319 } 320 } 321 break; 322 case 's': 323 pr->flags = F_STR; 324 switch(sokay) { 325 case NOTOKAY: 326 badsfmt(); 327 case USEBCNT: 328 pr->bcnt = fu->bcnt; 329 break; 330 case USEPREC: 331 pr->bcnt = prec; 332 break; 333 } 334 break; 335 case '_': 336 ++p2; 337 switch(p1[1]) { 338 case 'A': 339 endfu = fu; 340 fu->flags |= F_IGNORE; 341 /* FALLTHROUGH */ 342 case 'a': 343 pr->flags = F_ADDRESS; 344 ++p2; 345 switch(p1[2]) { 346 case 'd': case 'o': case'x': 347 cs[0] = 'q'; 348 cs[1] = p1[2]; 349 cs[2] = '\0'; 350 break; 351 default: 352 p1[3] = '\0'; 353 badconv(p1); 354 } 355 break; 356 case 'c': 357 pr->flags = F_C; 358 /* cs[0] = 'c'; set in conv_c */ 359 goto isint2; 360 case 'p': 361 pr->flags = F_P; 362 cs[0] = 'c'; 363 goto isint2; 364 case 'u': 365 pr->flags = F_U; 366 /* cs[0] = 'c'; set in conv_u */ 367 isint2: switch(fu->bcnt) { 368 case 0: case 1: 369 pr->bcnt = 1; 370 break; 371 default: 372 p1[2] = '\0'; 373 badcnt(p1); 374 } 375 break; 376 default: 377 p1[2] = '\0'; 378 badconv(p1); 379 } 380 break; 381 default: 382 p1[1] = '\0'; 383 badconv(p1); 384 } 385 386 /* 387 * Copy to PR format string, set conversion character 388 * pointer, update original. 389 */ 390 savech = *p2; 391 p1[0] = '\0'; 392 len = strlen(fmtp) + strlen(cs) + 1; 393 if ((pr->fmt = calloc(1, len)) == NULL) 394 err(1, NULL); 395 snprintf(pr->fmt, len, "%s%s", fmtp, cs); 396 *p2 = savech; 397 pr->cchar = pr->fmt + (p1 - fmtp); 398 fmtp = p2; 399 400 /* Only one conversion character if byte count. */ 401 if (!(pr->flags&F_ADDRESS) && fu->bcnt && nconv++) 402 errx(1, "byte count with multiple conversion characters"); 403 } 404 /* 405 * If format unit byte count not specified, figure it out 406 * so can adjust rep count later. 407 */ 408 if (!fu->bcnt) 409 for (pr = fu->nextpr; pr; pr = pr->nextpr) 410 fu->bcnt += pr->bcnt; 411 } 412 /* 413 * If the format string interprets any data at all, and it's 414 * not the same as the blocksize, and its last format unit 415 * interprets any data at all, and has no iteration count, 416 * repeat it as necessary. 417 * 418 * If, rep count is greater than 1, no trailing whitespace 419 * gets output from the last iteration of the format unit. 420 */ 421 for (fu = fs->nextfu; fu; fu = fu->nextfu) { 422 if (!fu->nextfu && fs->bcnt < blocksize && 423 !(fu->flags&F_SETREP) && fu->bcnt) 424 fu->reps += (blocksize - fs->bcnt) / fu->bcnt; 425 if (fu->reps > 1) { 426 for (pr = fu->nextpr;; pr = pr->nextpr) 427 if (!pr->nextpr) 428 break; 429 for (p1 = pr->fmt, p2 = NULL; *p1; ++p1) 430 p2 = isspace(*p1) ? p1 : NULL; 431 if (p2) 432 pr->nospace = p2; 433 } 434 } 435 #ifdef DEBUG 436 for (fu = fs->nextfu; fu; fu = fu->nextfu) { 437 (void)printf("fmt:"); 438 for (pr = fu->nextpr; pr; pr = pr->nextpr) 439 (void)printf(" {%s}", pr->fmt); 440 (void)printf("\n"); 441 } 442 #endif 443 } 444 445 void 446 escape(char *p1) 447 { 448 char *p2; 449 450 /* alphabetic escape sequences have to be done in place */ 451 for (p2 = p1;; p1++, p2++) { 452 if (*p1 == '\\') { 453 p1++; 454 switch(*p1) { 455 case '\0': 456 *p2 = '\\'; 457 *++p2 = '\0'; 458 return; 459 case 'a': 460 /* *p2 = '\a'; */ 461 *p2 = '\007'; 462 break; 463 case 'b': 464 *p2 = '\b'; 465 break; 466 case 'f': 467 *p2 = '\f'; 468 break; 469 case 'n': 470 *p2 = '\n'; 471 break; 472 case 'r': 473 *p2 = '\r'; 474 break; 475 case 't': 476 *p2 = '\t'; 477 break; 478 case 'v': 479 *p2 = '\v'; 480 break; 481 default: 482 *p2 = *p1; 483 break; 484 } 485 } else { 486 *p2 = *p1; 487 if (*p1 == '\0') 488 return; 489 } 490 } 491 } 492 493 void 494 badcnt(const char *s) 495 { 496 errx(1, "%s: bad byte count", s); 497 } 498 499 void 500 badsfmt(void) 501 { 502 errx(1, "%%s: requires a precision or a byte count"); 503 } 504 505 void 506 badfmt(const char *fmt) 507 { 508 errx(1, "\"%s\": bad format", fmt); 509 } 510 511 void 512 badconv(const char *ch) 513 { 514 errx(1, "%%%s: bad conversion character", ch); 515 } 516