Commit | Line | Data |
---|---|---|
7fca17f6 KB |
1 | /* |
2 | * Copyright (c) 1989 The Regents of the University of California. | |
3 | * All rights reserved. | |
4 | * | |
5 | * Redistribution and use in source and binary forms are permitted | |
6 | * provided that the above copyright notice and this paragraph are | |
7 | * duplicated in all such forms and that any documentation, | |
8 | * advertising materials, and other materials related to such | |
9 | * distribution and use acknowledge that the software was developed | |
10 | * by the University of California, Berkeley. The name of the | |
11 | * University may not be used to endorse or promote products derived | |
12 | * from this software without specific prior written permission. | |
13 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR | |
14 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED | |
15 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. | |
16 | */ | |
17 | ||
18 | #ifndef lint | |
19 | static char sccsid[] = "@(#)parse.c 5.1 (Berkeley) %G%"; | |
20 | #endif /* not lint */ | |
21 | ||
22 | #include <sys/types.h> | |
23 | #include <sys/file.h> | |
24 | #include <stdio.h> | |
25 | #include <ctype.h> | |
26 | #include <strings.h> | |
27 | #include "hexdump.h" | |
28 | ||
29 | FU *endfu; /* format at end-of-data */ | |
30 | ||
31 | addfile(name) | |
32 | char *name; | |
33 | { | |
34 | register char *p; | |
35 | FILE *fp; | |
36 | int ch; | |
37 | char buf[2048 + 1]; | |
38 | ||
39 | if (!(fp = fopen(name, "r"))) { | |
40 | (void)fprintf(stderr, "hexdump: can't read %s.\n", name); | |
41 | exit(1); | |
42 | } | |
43 | while (fgets(buf, sizeof(buf), fp)) { | |
44 | if (!(p = index(buf, '\n'))) { | |
45 | (void)fprintf(stderr, "hexdump: line too long.\n"); | |
46 | while ((ch = getchar()) != '\n' && ch != EOF); | |
47 | continue; | |
48 | } | |
49 | *p = '\0'; | |
50 | for (p = buf; *p && isspace(*p); ++p); | |
51 | if (!*p || *p == '#') | |
52 | continue; | |
53 | add(p); | |
54 | } | |
55 | (void)fclose(fp); | |
56 | } | |
57 | ||
58 | add(fmt) | |
59 | char *fmt; | |
60 | { | |
61 | register char *p; | |
62 | static FS **nextfs; | |
63 | FS *tfs; | |
64 | FU *tfu, **nextfu; | |
65 | char savech, *savep, *emalloc(), *strdup(); | |
66 | ||
67 | /* start new linked list of format units */ | |
68 | /* NOSTRICT */ | |
69 | tfs = (FS *)emalloc(sizeof(FS)); | |
70 | if (!fshead) | |
71 | fshead = tfs; | |
72 | else | |
73 | *nextfs = tfs; | |
74 | nextfs = &tfs->nextfs; | |
75 | nextfu = &tfs->nextfu; | |
76 | ||
77 | /* take the format string and break it up into format units */ | |
78 | for (p = fmt;;) { | |
79 | /* skip leading white space */ | |
80 | for (; isspace(*p); ++p); | |
81 | if (!*p) | |
82 | break; | |
83 | ||
84 | /* allocate a new format unit and link it in */ | |
85 | /* NOSTRICT */ | |
86 | tfu = (FU *)emalloc(sizeof(FU)); | |
87 | *nextfu = tfu; | |
88 | nextfu = &tfu->nextfu; | |
89 | tfu->reps = 1; | |
90 | ||
91 | /* if leading digit, repetition count */ | |
92 | if (isdigit(*p)) { | |
93 | for (savep = p; isdigit(*p); ++p); | |
94 | if (!isspace(*p) && *p != '/') | |
95 | badfmt(fmt); | |
96 | /* may overwrite either white space or slash */ | |
97 | savech = *p; | |
98 | *p = '\0'; | |
99 | tfu->reps = atoi(savep); | |
100 | tfu->flags = F_SETREP; | |
101 | *p = savech; | |
102 | /* skip trailing white space */ | |
103 | for (++p; isspace(*p); ++p); | |
104 | } | |
105 | ||
106 | /* skip slash and trailing white space */ | |
107 | if (*p == '/') | |
108 | while (isspace(*++p)); | |
109 | ||
110 | /* byte count */ | |
111 | if (isdigit(*p)) { | |
112 | for (savep = p; isdigit(*p); ++p); | |
113 | if (!isspace(*p)) | |
114 | badfmt(fmt); | |
115 | savech = *p; | |
116 | *p = '\0'; | |
117 | tfu->bcnt = atoi(savep); | |
118 | *p = savech; | |
119 | /* skip trailing white space */ | |
120 | for (++p; isspace(*p); ++p); | |
121 | } | |
122 | ||
123 | /* format */ | |
124 | if (*p != '"') | |
125 | badfmt(fmt); | |
126 | for (savep = ++p; *p != '"'; ++p); | |
127 | if (*p != '"') | |
128 | badfmt(fmt); | |
129 | savech = *p; | |
130 | *p = '\0'; | |
131 | if (!(tfu->fmt = strdup(savep))) | |
132 | nomem(); | |
133 | escape(tfu->fmt); | |
134 | *p++ = savech; | |
135 | } | |
136 | } | |
137 | ||
138 | static char *spec = ".#-+ 0123456789"; | |
139 | size(fs) | |
140 | FS *fs; | |
141 | { | |
142 | register FU *fu; | |
143 | register int bcnt, cursize; | |
144 | register char *fmt; | |
145 | int prec; | |
146 | ||
147 | /* figure out the data block size needed for each format unit */ | |
148 | for (cursize = 0, fu = fs->nextfu; fu; fu = fu->nextfu) { | |
149 | if (fu->bcnt) { | |
150 | cursize += fu->bcnt * fu->reps; | |
151 | continue; | |
152 | } | |
153 | for (bcnt = prec = 0, fmt = fu->fmt; *fmt; ++fmt) { | |
154 | if (*fmt != '%') | |
155 | continue; | |
156 | /* | |
157 | * skip any special chars -- save precision in | |
158 | * case it's a %s format. | |
159 | */ | |
160 | while (index(spec + 1, *++fmt)); | |
161 | if (*fmt == '.' && isdigit(*++fmt)) { | |
162 | prec = atoi(fmt); | |
163 | while (isdigit(*++fmt)); | |
164 | } | |
165 | switch(*fmt) { | |
166 | case 'c': | |
167 | bcnt += 1; | |
168 | break; | |
169 | case 'd': case 'i': case 'o': case 'u': | |
170 | case 'x': case 'X': | |
171 | bcnt += 4; | |
172 | break; | |
173 | case 'e': case 'E': case 'f': case 'g': case 'G': | |
174 | bcnt += 8; | |
175 | break; | |
176 | case 's': | |
177 | bcnt += prec; | |
178 | break; | |
179 | case '_': | |
180 | switch(*++fmt) { | |
181 | case 'c': case 'p': case 'u': | |
182 | bcnt += 1; | |
183 | break; | |
184 | } | |
185 | } | |
186 | } | |
187 | cursize += bcnt * fu->reps; | |
188 | } | |
189 | return(cursize); | |
190 | } | |
191 | ||
192 | rewrite(fs) | |
193 | FS *fs; | |
194 | { | |
195 | enum { NOTOKAY, USEBCNT, USEPREC } sokay; | |
196 | register PR *pr, **nextpr; | |
197 | register FU *fu; | |
198 | register char *p1, *p2; | |
199 | char savech, *fmtp; | |
200 | int nconv, prec; | |
201 | ||
202 | for (fu = fs->nextfu; fu; fu = fu->nextfu) { | |
203 | /* | |
204 | * break each format unit into print units; each | |
205 | * conversion character gets its own. | |
206 | */ | |
207 | for (nconv = 0, fmtp = fu->fmt; *fmtp; nextpr = &pr->nextpr) { | |
208 | /* NOSTRICT */ | |
209 | pr = (PR *)emalloc(sizeof(PR)); | |
210 | if (!fu->nextpr) | |
211 | fu->nextpr = pr; | |
212 | else | |
213 | *nextpr = pr; | |
214 | ||
215 | /* skip preceding text and up to the next % sign */ | |
216 | for (p1 = fmtp; *p1 && *p1 != '%'; ++p1); | |
217 | ||
218 | /* only text in the string */ | |
219 | if (!*p1) { | |
220 | pr->fmt = fmtp; | |
221 | pr->flags = F_TEXT; | |
222 | break; | |
223 | } | |
224 | ||
225 | /* | |
226 | * get precision for %s -- if have a byte count, don't | |
227 | * need it. | |
228 | */ | |
229 | if (fu->bcnt) { | |
230 | sokay = USEBCNT; | |
231 | /* skip to conversion character */ | |
232 | for (++p1; index(spec, *p1); ++p1); | |
233 | } else { | |
234 | /* skip any special chars, field width */ | |
235 | while (index(spec + 1, *++p1)); | |
236 | if (*p1 == '.' && isdigit(*++p1)) { | |
237 | sokay = USEPREC; | |
238 | prec = atoi(p1); | |
239 | while (isdigit(*++p1)); | |
240 | } | |
241 | else | |
242 | sokay = NOTOKAY; | |
243 | } | |
244 | ||
245 | p2 = p1 + 1; /* set end pointer */ | |
246 | ||
247 | /* | |
248 | * figure out the byte count for each conversion; | |
249 | * rewrite the format as necessary, set up blank- | |
250 | * padding for end of data. | |
251 | */ | |
252 | switch(*p1) { | |
253 | case 'c': | |
254 | pr->flags = F_CHAR; | |
255 | switch(fu->bcnt) { | |
256 | case 0: case 1: | |
257 | pr->bcnt = 1; | |
258 | break; | |
259 | default: | |
260 | p1[1] = '\0'; | |
261 | badcnt(p1); | |
262 | } | |
263 | break; | |
264 | case 'd': case 'i': | |
265 | pr->flags = F_INT; | |
266 | goto sw1; | |
267 | case 'o': case 'u': case 'x': case 'X': | |
268 | pr->flags = F_UINT; | |
269 | sw1: switch(fu->bcnt) { | |
270 | case 0: case 4: | |
271 | pr->bcnt = 4; | |
272 | break; | |
273 | case 1: | |
274 | pr->bcnt = 1; | |
275 | break; | |
276 | case 2: | |
277 | pr->bcnt = 2; | |
278 | break; | |
279 | default: | |
280 | p1[1] = '\0'; | |
281 | badcnt(p1); | |
282 | } | |
283 | break; | |
284 | case 'e': case 'E': case 'f': case 'g': case 'G': | |
285 | pr->flags = F_DBL; | |
286 | switch(fu->bcnt) { | |
287 | case 0: case 8: | |
288 | pr->bcnt = 8; | |
289 | break; | |
290 | case 4: | |
291 | pr->bcnt = 4; | |
292 | break; | |
293 | default: | |
294 | p1[1] = '\0'; | |
295 | badcnt(p1); | |
296 | } | |
297 | break; | |
298 | case 's': | |
299 | pr->flags = F_STR; | |
300 | switch(sokay) { | |
301 | case NOTOKAY: | |
302 | badsfmt(); | |
303 | case USEBCNT: | |
304 | pr->bcnt = fu->bcnt; | |
305 | break; | |
306 | case USEPREC: | |
307 | pr->bcnt = prec; | |
308 | break; | |
309 | } | |
310 | break; | |
311 | case '_': | |
312 | ++p2; | |
313 | switch(p1[1]) { | |
314 | case 'A': | |
315 | endfu = fu; | |
316 | fu->flags |= F_IGNORE; | |
317 | /* FALLTHROUGH */ | |
318 | case 'a': | |
319 | pr->flags = F_ADDRESS; | |
320 | ++p2; | |
321 | switch(p1[2]) { | |
322 | case 'd': case 'o': case'x': | |
323 | *p1 = p1[2]; | |
324 | break; | |
325 | default: | |
326 | p1[3] = '\0'; | |
327 | badconv(p1); | |
328 | } | |
329 | break; | |
330 | case 'c': | |
331 | pr->flags = F_C; | |
332 | /* *p1 = 'c'; set in conv_c */ | |
333 | goto sw2; | |
334 | case 'p': | |
335 | pr->flags = F_P; | |
336 | *p1 = 'c'; | |
337 | goto sw2; | |
338 | case 'u': | |
339 | pr->flags = F_U; | |
340 | /* *p1 = 'c'; set in conv_u */ | |
341 | sw2: switch(fu->bcnt) { | |
342 | case 0: case 1: | |
343 | pr->bcnt = 1; | |
344 | break; | |
345 | default: | |
346 | p1[2] = '\0'; | |
347 | badcnt(p1); | |
348 | } | |
349 | break; | |
350 | default: | |
351 | p1[2] = '\0'; | |
352 | badconv(p1); | |
353 | } | |
354 | break; | |
355 | default: | |
356 | p1[1] = '\0'; | |
357 | badconv(p1); | |
358 | } | |
359 | ||
360 | /* | |
361 | * copy to PR format string, set conversion character | |
362 | * pointer, update original. | |
363 | */ | |
364 | savech = *p2; | |
365 | p1[1] = '\0'; | |
366 | if (!(pr->fmt = strdup(fmtp))) | |
367 | nomem(); | |
368 | *p2 = savech; | |
369 | pr->cchar = pr->fmt + (p1 - fmtp); | |
370 | fmtp = p2; | |
371 | ||
372 | /* only one conversion character if byte count */ | |
373 | if (!(pr->flags&F_ADDRESS) && fu->bcnt && nconv++) { | |
374 | (void)fprintf(stderr, | |
375 | "hexdump: byte count with multiple conversion characters.\n"); | |
376 | exit(1); | |
377 | } | |
378 | } | |
379 | /* | |
380 | * if format unit byte count not specified, figure it out | |
381 | * so can adjust rep count later. | |
382 | */ | |
383 | if (!fu->bcnt) | |
384 | for (pr = fu->nextpr; pr; pr = pr->nextpr) | |
385 | fu->bcnt += pr->bcnt; | |
386 | } | |
387 | /* | |
388 | * if the format string interprets any data at all, and it's | |
389 | * not the same as the blocksize, and its last format unit | |
390 | * interprets any data at all, and has no iteration count, | |
391 | * repeat it as necessary. | |
392 | * | |
393 | * if, rep count is greater than 1, no trailing whitespace | |
394 | * gets output from the last iteration of the format unit. | |
395 | */ | |
396 | for (fu = fs->nextfu;; fu = fu->nextfu) { | |
397 | if (!fu->nextfu && fs->bcnt < blocksize && | |
398 | !(fu->flags&F_SETREP) && fu->bcnt) | |
399 | fu->reps += (blocksize - fs->bcnt) / fu->bcnt; | |
400 | if (fu->reps > 1) { | |
401 | for (pr = fu->nextpr;; pr = pr->nextpr) | |
402 | if (!pr->nextpr) | |
403 | break; | |
404 | for (p1 = pr->fmt, p2 = NULL; *p1; ++p1) | |
405 | p2 = isspace(*p1) ? p1 : NULL; | |
406 | if (p2) | |
407 | pr->nospace = p2; | |
408 | } | |
409 | if (!fu->nextfu) | |
410 | break; | |
411 | } | |
412 | } | |
413 | ||
414 | ||
415 | escape(p1) | |
416 | register char *p1; | |
417 | { | |
418 | register char *p2; | |
419 | ||
420 | /* alphabetic escape sequences have to be done in place */ | |
421 | for (p2 = p1;; ++p1, ++p2) { | |
422 | if (!*p1) { | |
423 | *p2 = *p1; | |
424 | break; | |
425 | } | |
426 | if (*p1 == '\\') | |
427 | switch(*++p1) { | |
428 | case 'a': | |
429 | /* *p2 = '\a'; */ | |
430 | *p2 = '\007'; | |
431 | break; | |
432 | case 'b': | |
433 | *p2 = '\b'; | |
434 | break; | |
435 | case 'f': | |
436 | *p2 = '\f'; | |
437 | break; | |
438 | case 'n': | |
439 | *p2 = '\n'; | |
440 | break; | |
441 | case 'r': | |
442 | *p2 = '\r'; | |
443 | break; | |
444 | case 't': | |
445 | *p2 = '\t'; | |
446 | break; | |
447 | case 'v': | |
448 | *p2 = '\v'; | |
449 | break; | |
450 | default: | |
451 | *p2 = *p1; | |
452 | break; | |
453 | } | |
454 | } | |
455 | } | |
456 | ||
457 | badcnt(s) | |
458 | char *s; | |
459 | { | |
460 | (void)fprintf(stderr, | |
461 | "hexdump: bad byte count for conversion character %s.\n", s); | |
462 | exit(1); | |
463 | } | |
464 | ||
465 | badsfmt() | |
466 | { | |
467 | (void)fprintf(stderr, | |
468 | "hexdump: %%s requires a precision or a byte count.\n"); | |
469 | exit(1); | |
470 | } | |
471 | ||
472 | badfmt(fmt) | |
473 | char *fmt; | |
474 | { | |
475 | (void)fprintf(stderr, "hexdump: bad format {%s}\n", fmt); | |
476 | exit(1); | |
477 | } | |
478 | ||
479 | badconv(ch) | |
480 | char *ch; | |
481 | { | |
482 | (void)fprintf(stderr, "hexdump: bad conversion character %s.\n", ch); | |
483 | exit(1); | |
484 | } |