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