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33 * @(#)parse.c 8.1 (Berkeley) 6/6/93
34 * $FreeBSD: src/usr.bin/hexdump/parse.c,v 1.4.2.1 2002/07/23 14:27:06 tjr Exp $
35 * $DragonFly: src/usr.bin/hexdump/parse.c,v 1.2 2003/06/17 04:29:27 dillon Exp $
38 #include <sys/types.h>
48 FU *endfu; /* format at end-of-data */
54 register unsigned char *p;
59 if ((fp = fopen(name, "r")) == NULL)
61 while (fgets(buf, sizeof(buf), fp)) {
62 if (!(p = index(buf, '\n'))) {
63 warnx("line too long");
64 while ((ch = getchar()) != '\n' && ch != EOF);
68 for (p = buf; *p && isspace(*p); ++p);
80 unsigned const char *p, *savep;
85 /* start new linked list of format units */
86 if ((tfs = calloc(1, sizeof(FS))) == NULL)
92 nextfs = &tfs->nextfs;
93 nextfu = &tfs->nextfu;
95 /* take the format string and break it up into format units */
97 /* skip leading white space */
98 for (; isspace(*p); ++p);
102 /* allocate a new format unit and link it in */
103 if ((tfu = calloc(1, sizeof(FU))) == NULL)
106 nextfu = &tfu->nextfu;
109 /* if leading digit, repetition count */
111 for (savep = p; isdigit(*p); ++p);
112 if (!isspace(*p) && *p != '/')
114 /* may overwrite either white space or slash */
115 tfu->reps = atoi(savep);
116 tfu->flags = F_SETREP;
117 /* skip trailing white space */
118 for (++p; isspace(*p); ++p);
121 /* skip slash and trailing white space */
123 while (isspace(*++p));
127 for (savep = p; isdigit(*p); ++p);
130 tfu->bcnt = atoi(savep);
131 /* skip trailing white space */
132 for (++p; isspace(*p); ++p);
138 for (savep = ++p; *p != '"';)
141 if (!(tfu->fmt = malloc(p - savep + 1)))
143 (void) strncpy(tfu->fmt, savep, p - savep);
144 tfu->fmt[p - savep] = '\0';
150 static const char *spec = ".#-+ 0123456789";
157 register int bcnt, cursize;
158 register unsigned char *fmt;
161 /* figure out the data block size needed for each format unit */
162 for (cursize = 0, fu = fs->nextfu; fu; fu = fu->nextfu) {
164 cursize += fu->bcnt * fu->reps;
167 for (bcnt = prec = 0, fmt = fu->fmt; *fmt; ++fmt) {
171 * skip any special chars -- save precision in
172 * case it's a %s format.
174 while (index(spec + 1, *++fmt));
175 if (*fmt == '.' && isdigit(*++fmt)) {
177 while (isdigit(*++fmt));
183 case 'd': case 'i': case 'o': case 'u':
187 case 'e': case 'E': case 'f': case 'g': case 'G':
195 case 'c': case 'p': case 'u':
201 cursize += bcnt * fu->reps;
210 enum { NOTOKAY, USEBCNT, USEPREC } sokay;
211 register PR *pr, **nextpr;
213 unsigned char *p1, *p2, *fmtp;
217 for (fu = fs->nextfu; fu; fu = fu->nextfu) {
219 * Break each format unit into print units; each conversion
220 * character gets its own.
222 for (nconv = 0, fmtp = fu->fmt; *fmtp; nextpr = &pr->nextpr) {
223 if ((pr = calloc(1, sizeof(PR))) == NULL)
230 /* Skip preceding text and up to the next % sign. */
231 for (p1 = fmtp; *p1 && *p1 != '%'; ++p1);
233 /* Only text in the string. */
241 * Get precision for %s -- if have a byte count, don't
246 /* Skip to conversion character. */
247 for (++p1; index(spec, *p1); ++p1);
249 /* Skip any special chars, field width. */
250 while (index(spec + 1, *++p1));
251 if (*p1 == '.' && isdigit(*++p1)) {
254 while (isdigit(*++p1));
259 p2 = p1 + 1; /* Set end pointer. */
260 cs[0] = *p1; /* Set conversion string. */
264 * Figure out the byte count for each conversion;
265 * rewrite the format as necessary, set up blank-
266 * padding for end of data.
283 case 'o': case 'u': case 'x': case 'X':
303 case 'e': case 'E': case 'f': case 'g': case 'G':
313 if (fu->bcnt == sizeof(long double)) {
317 pr->bcnt = sizeof(long double);
342 fu->flags |= F_IGNORE;
345 pr->flags = F_ADDRESS;
348 case 'd': case 'o': case'x':
360 /* cs[0] = 'c'; set in conv_c */
368 /* cs[0] = 'c'; set in conv_u */
369 isint2: switch(fu->bcnt) {
389 * Copy to PR format string, set conversion character
390 * pointer, update original.
394 if ((pr->fmt = calloc(1, strlen(fmtp) + 2)) == NULL)
396 (void)strcpy(pr->fmt, fmtp);
397 (void)strcat(pr->fmt, cs);
399 pr->cchar = pr->fmt + (p1 - fmtp);
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");
407 * If format unit byte count not specified, figure it out
408 * so can adjust rep count later.
411 for (pr = fu->nextpr; pr; pr = pr->nextpr)
412 fu->bcnt += pr->bcnt;
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.
420 * If, rep count is greater than 1, no trailing whitespace
421 * gets output from the last iteration of the format unit.
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;
428 for (pr = fu->nextpr;; pr = pr->nextpr)
431 for (p1 = pr->fmt, p2 = NULL; *p1; ++p1)
432 p2 = isspace(*p1) ? p1 : NULL;
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);
453 /* alphabetic escape sequences have to be done in place */
454 for (p2 = p1;; ++p1, ++p2) {
494 errx(1, "%s: bad byte count", s);
500 errx(1, "%%s: requires a precision or a byte count");
507 errx(1, "\"%s\": bad format", fmt);
514 errx(1, "%%%s: bad conversion character", ch);