2 * Copyright (c) 1989, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
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30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 static char sccsid[] = "@(#)parse.c 8.1 (Berkeley) 6/6/93";
39 #include <sys/cdefs.h>
40 __FBSDID("$FreeBSD$");
42 #include <sys/types.h>
52 FU *endfu; /* format at end-of-data */
62 if ((fp = fopen(name, "r")) == NULL)
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);
71 for (p = buf; *p && isspace(*p); ++p);
82 unsigned const char *p, *savep;
87 /* start new linked list of format units */
88 if ((tfs = calloc(1, sizeof(FS))) == NULL)
94 nextfs = &tfs->nextfs;
95 nextfu = &tfs->nextfu;
97 /* take the format string and break it up into format units */
99 /* skip leading white space */
100 for (; isspace(*p); ++p);
104 /* allocate a new format unit and link it in */
105 if ((tfu = calloc(1, sizeof(FU))) == NULL)
108 nextfu = &tfu->nextfu;
111 /* if leading digit, repetition count */
113 for (savep = p; isdigit(*p); ++p);
114 if (!isspace(*p) && *p != '/')
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);
123 /* skip slash and trailing white space */
125 while (isspace(*++p));
129 for (savep = p; isdigit(*p); ++p);
132 tfu->bcnt = atoi(savep);
133 /* skip trailing white space */
134 for (++p; isspace(*p); ++p);
140 for (savep = ++p; *p != '"';)
143 if (!(tfu->fmt = malloc(p - savep + 1)))
145 (void) strlcpy(tfu->fmt, savep, p - savep + 1);
151 static const char *spec = ".#-+ 0123456789";
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;
209 enum { NOTOKAY, USEBCNT, USEPREC } sokay;
212 unsigned char *p1, *p2, *fmtp;
219 for (fu = fs->nextfu; fu; fu = fu->nextfu) {
221 * Break each format unit into print units; each conversion
222 * character gets its own.
224 nextpr = &fu->nextpr;
225 for (nconv = 0, fmtp = fu->fmt; *fmtp; nextpr = &pr->nextpr) {
226 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 ? p1 + 1 : p1; /* Set end pointer -- make sure
260 * that it's non-NUL/-NULL first
262 cs[0] = *p1; /* Set conversion string. */
266 * Figure out the byte count for each conversion;
267 * rewrite the format as necessary, set up blank-
268 * padding for end of data.
285 case 'o': case 'u': case 'x': case 'X':
305 case 'e': case 'E': case 'f': case 'g': case 'G':
315 if (fu->bcnt == sizeof(long double)) {
319 pr->bcnt = sizeof(long double);
344 fu->flags |= F_IGNORE;
347 pr->flags = F_ADDRESS;
350 case 'd': case 'o': case'x':
362 /* cs[0] = 'c'; set in conv_c */
370 /* cs[0] = 'c'; set in conv_u */
371 isint2: switch(fu->bcnt) {
391 * Copy to PR format string, set conversion character
392 * pointer, update original.
396 len = strlen(fmtp) + strlen(cs) + 1;
397 if ((pr->fmt = calloc(1, len)) == NULL)
399 snprintf(pr->fmt, len, "%s%s", fmtp, cs);
401 pr->cchar = pr->fmt + (p1 - fmtp);
404 /* Only one conversion character if byte count. */
405 if (!(pr->flags&F_ADDRESS) && fu->bcnt && nconv++)
406 errx(1, "byte count with multiple conversion characters");
409 * If format unit byte count not specified, figure it out
410 * so can adjust rep count later.
413 for (pr = fu->nextpr; pr; pr = pr->nextpr)
414 fu->bcnt += pr->bcnt;
417 * If the format string interprets any data at all, and it's
418 * not the same as the blocksize, and its last format unit
419 * interprets any data at all, and has no iteration count,
420 * repeat it as necessary.
422 * If, rep count is greater than 1, no trailing whitespace
423 * gets output from the last iteration of the format unit.
425 for (fu = fs->nextfu; fu; fu = fu->nextfu) {
426 if (!fu->nextfu && fs->bcnt < blocksize &&
427 !(fu->flags&F_SETREP) && fu->bcnt)
428 fu->reps += (blocksize - fs->bcnt) / fu->bcnt;
430 for (pr = fu->nextpr;; pr = pr->nextpr)
433 for (p1 = pr->fmt, p2 = NULL; *p1; ++p1)
434 p2 = isspace(*p1) ? p1 : NULL;
440 for (fu = fs->nextfu; fu; fu = fu->nextfu) {
441 (void)printf("fmt:");
442 for (pr = fu->nextpr; pr; pr = pr->nextpr)
443 (void)printf(" {%s}", pr->fmt);
454 /* alphabetic escape sequences have to be done in place */
455 for (p2 = p1;; p1++, p2++) {
500 errx(1, "%s: bad byte count", s);
506 errx(1, "%%s: requires a precision or a byte count");
510 badfmt(const char *fmt)
512 errx(1, "\"%s\": bad format", fmt);
518 errx(1, "%%%s: bad conversion character", ch);