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7fca17f6 | 1 | /* |
ad787160 C |
2 | * Copyright (c) 1989, 1993 |
3 | * The Regents of the University of California. All rights reserved. | |
7fca17f6 | 4 | * |
ad787160 C |
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. | |
7fca17f6 KB |
32 | */ |
33 | ||
34 | #ifndef lint | |
ad787160 | 35 | static char sccsid[] = "@(#)parse.c 8.1 (Berkeley) 6/6/93"; |
7fca17f6 KB |
36 | #endif /* not lint */ |
37 | ||
38 | #include <sys/types.h> | |
f6c118b0 KB |
39 | |
40 | #include <errno.h> | |
41 | #include <fcntl.h> | |
7fca17f6 | 42 | #include <stdio.h> |
864336d0 | 43 | #include <stdlib.h> |
7fca17f6 | 44 | #include <ctype.h> |
38dde0cd | 45 | #include <string.h> |
7fca17f6 KB |
46 | #include "hexdump.h" |
47 | ||
48 | FU *endfu; /* format at end-of-data */ | |
49 | ||
f6c118b0 | 50 | void |
7fca17f6 KB |
51 | addfile(name) |
52 | char *name; | |
53 | { | |
54 | register char *p; | |
55 | FILE *fp; | |
56 | int ch; | |
57 | char buf[2048 + 1]; | |
58 | ||
f6c118b0 KB |
59 | if ((fp = fopen(name, "r")) == NULL) |
60 | err("%s: %s\n", name, strerror(errno)); | |
7fca17f6 KB |
61 | while (fgets(buf, sizeof(buf), fp)) { |
62 | if (!(p = index(buf, '\n'))) { | |
63 | (void)fprintf(stderr, "hexdump: line too long.\n"); | |
64 | while ((ch = getchar()) != '\n' && ch != EOF); | |
65 | continue; | |
66 | } | |
67 | *p = '\0'; | |
68 | for (p = buf; *p && isspace(*p); ++p); | |
69 | if (!*p || *p == '#') | |
70 | continue; | |
71 | add(p); | |
72 | } | |
73 | (void)fclose(fp); | |
74 | } | |
75 | ||
f6c118b0 | 76 | void |
864336d0 KB |
77 | add(fmt) |
78 | char *fmt; | |
7fca17f6 KB |
79 | { |
80 | register char *p; | |
81 | static FS **nextfs; | |
82 | FS *tfs; | |
83 | FU *tfu, **nextfu; | |
f6c118b0 | 84 | char *savep; |
7fca17f6 KB |
85 | |
86 | /* start new linked list of format units */ | |
f6c118b0 | 87 | tfs = emalloc(sizeof(FS)); |
7fca17f6 KB |
88 | if (!fshead) |
89 | fshead = tfs; | |
90 | else | |
91 | *nextfs = tfs; | |
92 | nextfs = &tfs->nextfs; | |
93 | nextfu = &tfs->nextfu; | |
94 | ||
95 | /* take the format string and break it up into format units */ | |
96 | for (p = fmt;;) { | |
97 | /* skip leading white space */ | |
98 | for (; isspace(*p); ++p); | |
99 | if (!*p) | |
100 | break; | |
101 | ||
102 | /* allocate a new format unit and link it in */ | |
f6c118b0 | 103 | tfu = emalloc(sizeof(FU)); |
7fca17f6 KB |
104 | *nextfu = tfu; |
105 | nextfu = &tfu->nextfu; | |
106 | tfu->reps = 1; | |
107 | ||
108 | /* if leading digit, repetition count */ | |
109 | if (isdigit(*p)) { | |
110 | for (savep = p; isdigit(*p); ++p); | |
111 | if (!isspace(*p) && *p != '/') | |
112 | badfmt(fmt); | |
113 | /* may overwrite either white space or slash */ | |
7fca17f6 KB |
114 | tfu->reps = atoi(savep); |
115 | tfu->flags = F_SETREP; | |
7fca17f6 KB |
116 | /* skip trailing white space */ |
117 | for (++p; isspace(*p); ++p); | |
118 | } | |
119 | ||
120 | /* skip slash and trailing white space */ | |
121 | if (*p == '/') | |
122 | while (isspace(*++p)); | |
123 | ||
124 | /* byte count */ | |
125 | if (isdigit(*p)) { | |
126 | for (savep = p; isdigit(*p); ++p); | |
127 | if (!isspace(*p)) | |
128 | badfmt(fmt); | |
7fca17f6 | 129 | tfu->bcnt = atoi(savep); |
7fca17f6 KB |
130 | /* skip trailing white space */ |
131 | for (++p; isspace(*p); ++p); | |
132 | } | |
133 | ||
134 | /* format */ | |
135 | if (*p != '"') | |
136 | badfmt(fmt); | |
864336d0 KB |
137 | for (savep = ++p; *p != '"';) |
138 | if (*p++ == 0) | |
139 | badfmt(fmt); | |
140 | if (!(tfu->fmt = malloc(p - savep + 1))) | |
7fca17f6 | 141 | nomem(); |
864336d0 KB |
142 | (void) strncpy(tfu->fmt, savep, p - savep); |
143 | tfu->fmt[p - savep] = '\0'; | |
7fca17f6 | 144 | escape(tfu->fmt); |
864336d0 | 145 | p++; |
7fca17f6 KB |
146 | } |
147 | } | |
148 | ||
149 | static char *spec = ".#-+ 0123456789"; | |
f6c118b0 KB |
150 | |
151 | int | |
7fca17f6 KB |
152 | size(fs) |
153 | FS *fs; | |
154 | { | |
155 | register FU *fu; | |
156 | register int bcnt, cursize; | |
157 | register char *fmt; | |
158 | int prec; | |
159 | ||
160 | /* figure out the data block size needed for each format unit */ | |
161 | for (cursize = 0, fu = fs->nextfu; fu; fu = fu->nextfu) { | |
162 | if (fu->bcnt) { | |
163 | cursize += fu->bcnt * fu->reps; | |
164 | continue; | |
165 | } | |
166 | for (bcnt = prec = 0, fmt = fu->fmt; *fmt; ++fmt) { | |
167 | if (*fmt != '%') | |
168 | continue; | |
169 | /* | |
170 | * skip any special chars -- save precision in | |
171 | * case it's a %s format. | |
172 | */ | |
173 | while (index(spec + 1, *++fmt)); | |
174 | if (*fmt == '.' && isdigit(*++fmt)) { | |
175 | prec = atoi(fmt); | |
176 | while (isdigit(*++fmt)); | |
177 | } | |
178 | switch(*fmt) { | |
179 | case 'c': | |
180 | bcnt += 1; | |
181 | break; | |
182 | case 'd': case 'i': case 'o': case 'u': | |
183 | case 'x': case 'X': | |
184 | bcnt += 4; | |
185 | break; | |
186 | case 'e': case 'E': case 'f': case 'g': case 'G': | |
187 | bcnt += 8; | |
188 | break; | |
189 | case 's': | |
190 | bcnt += prec; | |
191 | break; | |
192 | case '_': | |
193 | switch(*++fmt) { | |
194 | case 'c': case 'p': case 'u': | |
195 | bcnt += 1; | |
196 | break; | |
197 | } | |
198 | } | |
199 | } | |
200 | cursize += bcnt * fu->reps; | |
201 | } | |
f6c118b0 | 202 | return (cursize); |
7fca17f6 KB |
203 | } |
204 | ||
f6c118b0 | 205 | void |
7fca17f6 KB |
206 | rewrite(fs) |
207 | FS *fs; | |
208 | { | |
209 | enum { NOTOKAY, USEBCNT, USEPREC } sokay; | |
210 | register PR *pr, **nextpr; | |
211 | register FU *fu; | |
212 | register char *p1, *p2; | |
f6c118b0 | 213 | char savech, *fmtp, cs[3]; |
7fca17f6 KB |
214 | int nconv, prec; |
215 | ||
216 | for (fu = fs->nextfu; fu; fu = fu->nextfu) { | |
217 | /* | |
f6c118b0 KB |
218 | * Break each format unit into print units; each conversion |
219 | * character gets its own. | |
7fca17f6 KB |
220 | */ |
221 | for (nconv = 0, fmtp = fu->fmt; *fmtp; nextpr = &pr->nextpr) { | |
f6c118b0 | 222 | pr = emalloc(sizeof(PR)); |
7fca17f6 KB |
223 | if (!fu->nextpr) |
224 | fu->nextpr = pr; | |
225 | else | |
226 | *nextpr = pr; | |
227 | ||
f6c118b0 | 228 | /* Skip preceding text and up to the next % sign. */ |
7fca17f6 KB |
229 | for (p1 = fmtp; *p1 && *p1 != '%'; ++p1); |
230 | ||
f6c118b0 | 231 | /* Only text in the string. */ |
7fca17f6 KB |
232 | if (!*p1) { |
233 | pr->fmt = fmtp; | |
234 | pr->flags = F_TEXT; | |
235 | break; | |
236 | } | |
237 | ||
238 | /* | |
f6c118b0 | 239 | * Get precision for %s -- if have a byte count, don't |
7fca17f6 KB |
240 | * need it. |
241 | */ | |
242 | if (fu->bcnt) { | |
243 | sokay = USEBCNT; | |
f6c118b0 | 244 | /* Skip to conversion character. */ |
7fca17f6 KB |
245 | for (++p1; index(spec, *p1); ++p1); |
246 | } else { | |
f6c118b0 | 247 | /* Skip any special chars, field width. */ |
7fca17f6 KB |
248 | while (index(spec + 1, *++p1)); |
249 | if (*p1 == '.' && isdigit(*++p1)) { | |
250 | sokay = USEPREC; | |
251 | prec = atoi(p1); | |
252 | while (isdigit(*++p1)); | |
f6c118b0 | 253 | } else |
7fca17f6 KB |
254 | sokay = NOTOKAY; |
255 | } | |
256 | ||
f6c118b0 KB |
257 | p2 = p1 + 1; /* Set end pointer. */ |
258 | cs[0] = *p1; /* Set conversion string. */ | |
259 | cs[1] = '\0'; | |
7fca17f6 KB |
260 | |
261 | /* | |
f6c118b0 | 262 | * Figure out the byte count for each conversion; |
7fca17f6 KB |
263 | * rewrite the format as necessary, set up blank- |
264 | * padding for end of data. | |
265 | */ | |
f6c118b0 | 266 | switch(cs[0]) { |
7fca17f6 KB |
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; | |
f6c118b0 | 280 | goto isint; |
7fca17f6 KB |
281 | case 'o': case 'u': case 'x': case 'X': |
282 | pr->flags = F_UINT; | |
f6c118b0 KB |
283 | isint: cs[2] = '\0'; |
284 | cs[1] = cs[0]; | |
285 | cs[0] = 'q'; | |
286 | switch(fu->bcnt) { | |
7fca17f6 KB |
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 | p1[1] = '\0'; | |
312 | badcnt(p1); | |
313 | } | |
314 | break; | |
315 | case 's': | |
316 | pr->flags = F_STR; | |
317 | switch(sokay) { | |
318 | case NOTOKAY: | |
319 | badsfmt(); | |
320 | case USEBCNT: | |
321 | pr->bcnt = fu->bcnt; | |
322 | break; | |
323 | case USEPREC: | |
324 | pr->bcnt = prec; | |
325 | break; | |
326 | } | |
327 | break; | |
328 | case '_': | |
329 | ++p2; | |
330 | switch(p1[1]) { | |
331 | case 'A': | |
332 | endfu = fu; | |
333 | fu->flags |= F_IGNORE; | |
334 | /* FALLTHROUGH */ | |
335 | case 'a': | |
336 | pr->flags = F_ADDRESS; | |
337 | ++p2; | |
338 | switch(p1[2]) { | |
339 | case 'd': case 'o': case'x': | |
f6c118b0 KB |
340 | cs[0] = 'q'; |
341 | cs[1] = p1[2]; | |
342 | cs[2] = '\0'; | |
7fca17f6 KB |
343 | break; |
344 | default: | |
345 | p1[3] = '\0'; | |
346 | badconv(p1); | |
347 | } | |
348 | break; | |
349 | case 'c': | |
350 | pr->flags = F_C; | |
f6c118b0 KB |
351 | /* cs[0] = 'c'; set in conv_c */ |
352 | goto isint2; | |
7fca17f6 KB |
353 | case 'p': |
354 | pr->flags = F_P; | |
f6c118b0 KB |
355 | cs[0] = 'c'; |
356 | goto isint2; | |
7fca17f6 KB |
357 | case 'u': |
358 | pr->flags = F_U; | |
f6c118b0 KB |
359 | /* cs[0] = 'c'; set in conv_u */ |
360 | isint2: switch(fu->bcnt) { | |
7fca17f6 KB |
361 | case 0: case 1: |
362 | pr->bcnt = 1; | |
363 | break; | |
364 | default: | |
365 | p1[2] = '\0'; | |
366 | badcnt(p1); | |
367 | } | |
368 | break; | |
369 | default: | |
370 | p1[2] = '\0'; | |
371 | badconv(p1); | |
372 | } | |
373 | break; | |
374 | default: | |
375 | p1[1] = '\0'; | |
376 | badconv(p1); | |
377 | } | |
378 | ||
379 | /* | |
f6c118b0 | 380 | * Copy to PR format string, set conversion character |
7fca17f6 KB |
381 | * pointer, update original. |
382 | */ | |
383 | savech = *p2; | |
f6c118b0 KB |
384 | p1[0] = '\0'; |
385 | pr->fmt = emalloc(strlen(fmtp) + 2); | |
386 | (void)strcpy(pr->fmt, fmtp); | |
387 | (void)strcat(pr->fmt, cs); | |
7fca17f6 KB |
388 | *p2 = savech; |
389 | pr->cchar = pr->fmt + (p1 - fmtp); | |
390 | fmtp = p2; | |
391 | ||
f6c118b0 KB |
392 | /* Only one conversion character if byte count. */ |
393 | if (!(pr->flags&F_ADDRESS) && fu->bcnt && nconv++) | |
394 | err("byte count with multiple conversion characters"); | |
7fca17f6 KB |
395 | } |
396 | /* | |
f6c118b0 | 397 | * If format unit byte count not specified, figure it out |
7fca17f6 KB |
398 | * so can adjust rep count later. |
399 | */ | |
400 | if (!fu->bcnt) | |
401 | for (pr = fu->nextpr; pr; pr = pr->nextpr) | |
402 | fu->bcnt += pr->bcnt; | |
403 | } | |
404 | /* | |
f6c118b0 | 405 | * If the format string interprets any data at all, and it's |
7fca17f6 KB |
406 | * not the same as the blocksize, and its last format unit |
407 | * interprets any data at all, and has no iteration count, | |
408 | * repeat it as necessary. | |
409 | * | |
f6c118b0 | 410 | * If, rep count is greater than 1, no trailing whitespace |
7fca17f6 KB |
411 | * gets output from the last iteration of the format unit. |
412 | */ | |
413 | for (fu = fs->nextfu;; fu = fu->nextfu) { | |
414 | if (!fu->nextfu && fs->bcnt < blocksize && | |
415 | !(fu->flags&F_SETREP) && fu->bcnt) | |
416 | fu->reps += (blocksize - fs->bcnt) / fu->bcnt; | |
417 | if (fu->reps > 1) { | |
418 | for (pr = fu->nextpr;; pr = pr->nextpr) | |
419 | if (!pr->nextpr) | |
420 | break; | |
421 | for (p1 = pr->fmt, p2 = NULL; *p1; ++p1) | |
422 | p2 = isspace(*p1) ? p1 : NULL; | |
423 | if (p2) | |
424 | pr->nospace = p2; | |
425 | } | |
426 | if (!fu->nextfu) | |
427 | break; | |
428 | } | |
f6c118b0 KB |
429 | #ifdef DEBUG |
430 | for (fu = fs->nextfu; fu; fu = fu->nextfu) { | |
431 | (void)printf("fmt:"); | |
432 | for (pr = fu->nextpr; pr; pr = pr->nextpr) | |
433 | (void)printf(" {%s}", pr->fmt); | |
434 | (void)printf("\n"); | |
435 | } | |
436 | #endif | |
7fca17f6 KB |
437 | } |
438 | ||
f6c118b0 | 439 | void |
7fca17f6 KB |
440 | escape(p1) |
441 | register char *p1; | |
442 | { | |
443 | register char *p2; | |
444 | ||
445 | /* alphabetic escape sequences have to be done in place */ | |
446 | for (p2 = p1;; ++p1, ++p2) { | |
447 | if (!*p1) { | |
448 | *p2 = *p1; | |
449 | break; | |
450 | } | |
451 | if (*p1 == '\\') | |
452 | switch(*++p1) { | |
453 | case 'a': | |
454 | /* *p2 = '\a'; */ | |
455 | *p2 = '\007'; | |
456 | break; | |
457 | case 'b': | |
458 | *p2 = '\b'; | |
459 | break; | |
460 | case 'f': | |
461 | *p2 = '\f'; | |
462 | break; | |
463 | case 'n': | |
464 | *p2 = '\n'; | |
465 | break; | |
466 | case 'r': | |
467 | *p2 = '\r'; | |
468 | break; | |
469 | case 't': | |
470 | *p2 = '\t'; | |
471 | break; | |
472 | case 'v': | |
473 | *p2 = '\v'; | |
474 | break; | |
475 | default: | |
476 | *p2 = *p1; | |
477 | break; | |
478 | } | |
479 | } | |
480 | } | |
481 | ||
f6c118b0 | 482 | void |
7fca17f6 KB |
483 | badcnt(s) |
484 | char *s; | |
485 | { | |
f6c118b0 | 486 | err("%s: bad byte count", s); |
7fca17f6 KB |
487 | } |
488 | ||
f6c118b0 | 489 | void |
7fca17f6 KB |
490 | badsfmt() |
491 | { | |
f6c118b0 | 492 | err("%%s: requires a precision or a byte count\n"); |
7fca17f6 KB |
493 | } |
494 | ||
f6c118b0 | 495 | void |
7fca17f6 KB |
496 | badfmt(fmt) |
497 | char *fmt; | |
498 | { | |
f6c118b0 | 499 | err("\"%s\": bad format\n", fmt); |
7fca17f6 KB |
500 | } |
501 | ||
f6c118b0 | 502 | void |
7fca17f6 KB |
503 | badconv(ch) |
504 | char *ch; | |
505 | { | |
f6c118b0 | 506 | err("%%%s: bad conversion character\n", ch); |
7fca17f6 | 507 | } |