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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 1.6 2005/04/10 20:55:38 drhodus Exp $
38 #include <sys/types.h>
48 FU *endfu; /* format at end-of-data */
58 if ((fp = fopen(name, "r")) == NULL)
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);
67 for (p = buf; *p && isspace(*p); ++p);
78 unsigned const char *p, *savep;
83 /* start new linked list of format units */
84 if ((tfs = calloc(1, sizeof(FS))) == NULL)
90 nextfs = &tfs->nextfs;
91 nextfu = &tfs->nextfu;
93 /* take the format string and break it up into format units */
95 /* skip leading white space */
96 for (; isspace(*p); ++p);
100 /* allocate a new format unit and link it in */
101 if ((tfu = calloc(1, sizeof(FU))) == NULL)
104 nextfu = &tfu->nextfu;
107 /* if leading digit, repetition count */
109 for (savep = p; isdigit(*p); ++p);
110 if (!isspace(*p) && *p != '/')
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);
119 /* skip slash and trailing white space */
121 while (isspace(*++p));
125 for (savep = p; isdigit(*p); ++p);
128 tfu->bcnt = atoi(savep);
129 /* skip trailing white space */
130 for (++p; isspace(*p); ++p);
136 for (savep = ++p; *p != '"';)
139 if (!(tfu->fmt = malloc(p - savep + 1)))
141 (void) strncpy(tfu->fmt, savep, p - savep);
142 tfu->fmt[p - savep] = '\0';
148 static const char *spec = ".#-+ 0123456789";
158 /* figure out the data block size needed for each format unit */
159 for (cursize = 0, fu = fs->nextfu; fu; fu = fu->nextfu) {
161 cursize += fu->bcnt * fu->reps;
164 for (bcnt = prec = 0, fmt = fu->fmt; *fmt; ++fmt) {
168 * skip any special chars -- save precision in
169 * case it's a %s format.
171 while (strchr(spec + 1, *++fmt));
172 if (*fmt == '.' && isdigit(*++fmt)) {
174 while (isdigit(*++fmt));
180 case 'd': case 'i': case 'o': case 'u':
184 case 'e': case 'E': case 'f': case 'g': case 'G':
192 case 'c': case 'p': case 'u':
198 cursize += bcnt * fu->reps;
206 enum { NOTOKAY, USEBCNT, USEPREC } sokay;
207 PR *pr, **nextpr = NULL;
209 unsigned char *p1, *p2, *fmtp;
213 for (fu = fs->nextfu; fu; fu = fu->nextfu) {
215 * Break each format unit into print units; each conversion
216 * character gets its own.
218 for (nconv = 0, fmtp = fu->fmt; *fmtp; nextpr = &pr->nextpr) {
219 if ((pr = calloc(1, sizeof(PR))) == NULL)
226 /* Skip preceding text and up to the next % sign. */
227 for (p1 = fmtp; *p1 && *p1 != '%'; ++p1);
229 /* Only text in the string. */
237 * Get precision for %s -- if have a byte count, don't
242 /* Skip to conversion character. */
243 for (++p1; strchr(spec, *p1); ++p1);
245 /* Skip any special chars, field width. */
246 while (strchr(spec + 1, *++p1));
247 if (*p1 == '.' && isdigit(*++p1)) {
250 while (isdigit(*++p1));
255 p2 = p1 + 1; /* Set end pointer. */
256 cs[0] = *p1; /* Set conversion string. */
260 * Figure out the byte count for each conversion;
261 * rewrite the format as necessary, set up blank-
262 * padding for end of data.
279 case 'o': case 'u': case 'x': case 'X':
299 case 'e': case 'E': case 'f': case 'g': case 'G':
309 if (fu->bcnt == sizeof(long double)) {
313 pr->bcnt = sizeof(long double);
338 fu->flags |= F_IGNORE;
341 pr->flags = F_ADDRESS;
344 case 'd': case 'o': case'x':
356 /* cs[0] = 'c'; set in conv_c */
364 /* cs[0] = 'c'; set in conv_u */
365 isint2: switch(fu->bcnt) {
385 * Copy to PR format string, set conversion character
386 * pointer, update original.
390 if ((pr->fmt = calloc(1, strlen(fmtp) + 2)) == NULL)
392 (void)strcpy(pr->fmt, fmtp);
393 (void)strcat(pr->fmt, cs);
395 pr->cchar = pr->fmt + (p1 - fmtp);
398 /* Only one conversion character if byte count. */
399 if (!(pr->flags&F_ADDRESS) && fu->bcnt && nconv++)
400 errx(1, "byte count with multiple conversion characters");
403 * If format unit byte count not specified, figure it out
404 * so can adjust rep count later.
407 for (pr = fu->nextpr; pr; pr = pr->nextpr)
408 fu->bcnt += pr->bcnt;
411 * If the format string interprets any data at all, and it's
412 * not the same as the blocksize, and its last format unit
413 * interprets any data at all, and has no iteration count,
414 * repeat it as necessary.
416 * If, rep count is greater than 1, no trailing whitespace
417 * gets output from the last iteration of the format unit.
419 for (fu = fs->nextfu; fu; fu = fu->nextfu) {
420 if (!fu->nextfu && fs->bcnt < blocksize &&
421 !(fu->flags&F_SETREP) && fu->bcnt)
422 fu->reps += (blocksize - fs->bcnt) / fu->bcnt;
424 for (pr = fu->nextpr;; pr = pr->nextpr)
427 for (p1 = pr->fmt, p2 = NULL; *p1; ++p1)
428 p2 = isspace(*p1) ? p1 : NULL;
434 for (fu = fs->nextfu; fu; fu = fu->nextfu) {
435 (void)printf("fmt:");
436 for (pr = fu->nextpr; pr; pr = pr->nextpr)
437 (void)printf(" {%s}", pr->fmt);
448 /* alphabetic escape sequences have to be done in place */
449 for (p2 = p1;; ++p1, ++p2) {
488 errx(1, "%s: bad byte count", s);
494 errx(1, "%%s: requires a precision or a byte count");
498 badfmt(const char *fmt)
500 errx(1, "\"%s\": bad format", fmt);
506 errx(1, "%%%s: bad conversion character", ch);