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 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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32 static char sccsid[] = "@(#)parse.c 8.1 (Berkeley) 6/6/93";
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
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 = index(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) strlcpy(tfu->fmt, savep, p - savep + 1);
147 static const char *spec = ".#-+ 0123456789";
157 /* figure out the data block size needed for each format unit */
158 for (cursize = 0, fu = fs->nextfu; fu; fu = fu->nextfu) {
160 cursize += fu->bcnt * fu->reps;
163 for (bcnt = prec = 0, fmt = fu->fmt; *fmt; ++fmt) {
167 * skip any special chars -- save precision in
168 * case it's a %s format.
170 while (index(spec + 1, *++fmt));
171 if (*fmt == '.' && isdigit(*++fmt)) {
173 while (isdigit(*++fmt));
179 case 'd': case 'i': case 'o': case 'u':
183 case 'e': case 'E': case 'f': case 'g': case 'G':
191 case 'c': case 'p': case 'u':
197 cursize += bcnt * fu->reps;
205 enum { NOTOKAY, USEBCNT, USEPREC } sokay;
208 unsigned char *p1, *p2, *fmtp;
216 for (fu = fs->nextfu; fu; fu = fu->nextfu) {
218 * Break each format unit into print units; each conversion
219 * character gets its own.
221 for (nconv = 0, fmtp = fu->fmt; *fmtp; nextpr = &pr->nextpr) {
222 if ((pr = calloc(1, sizeof(PR))) == NULL)
229 /* Skip preceding text and up to the next % sign. */
230 for (p1 = fmtp; *p1 && *p1 != '%'; ++p1);
232 /* Only text in the string. */
240 * Get precision for %s -- if have a byte count, don't
245 /* Skip to conversion character. */
246 for (++p1; index(spec, *p1); ++p1);
248 /* Skip any special chars, field width. */
249 while (index(spec + 1, *++p1));
250 if (*p1 == '.' && isdigit(*++p1)) {
253 while (isdigit(*++p1));
258 p2 = p1 + 1; /* Set end pointer. */
259 cs[0] = *p1; /* Set conversion string. */
263 * Figure out the byte count for each conversion;
264 * rewrite the format as necessary, set up blank-
265 * padding for end of data.
282 case 'o': case 'u': case 'x': case 'X':
302 case 'e': case 'E': case 'f': case 'g': case 'G':
312 if (fu->bcnt == sizeof(long double)) {
316 pr->bcnt = sizeof(long double);
341 fu->flags |= F_IGNORE;
344 pr->flags = F_ADDRESS;
347 case 'd': case 'o': case'x':
359 /* cs[0] = 'c'; set in conv_c */
367 /* cs[0] = 'c'; set in conv_u */
368 isint2: switch(fu->bcnt) {
388 * Copy to PR format string, set conversion character
389 * pointer, update original.
393 len = strlen(fmtp) + strlen(cs) + 1;
394 if ((pr->fmt = calloc(1, len)) == NULL)
396 snprintf(pr->fmt, len, "%s%s", fmtp, cs);
398 pr->cchar = pr->fmt + (p1 - fmtp);
401 /* Only one conversion character if byte count. */
402 if (!(pr->flags&F_ADDRESS) && fu->bcnt && nconv++)
403 errx(1, "byte count with multiple conversion characters");
406 * If format unit byte count not specified, figure it out
407 * so can adjust rep count later.
410 for (pr = fu->nextpr; pr; pr = pr->nextpr)
411 fu->bcnt += pr->bcnt;
414 * If the format string interprets any data at all, and it's
415 * not the same as the blocksize, and its last format unit
416 * interprets any data at all, and has no iteration count,
417 * repeat it as necessary.
419 * If, rep count is greater than 1, no trailing whitespace
420 * gets output from the last iteration of the format unit.
422 for (fu = fs->nextfu; fu; fu = fu->nextfu) {
423 if (!fu->nextfu && fs->bcnt < blocksize &&
424 !(fu->flags&F_SETREP) && fu->bcnt)
425 fu->reps += (blocksize - fs->bcnt) / fu->bcnt;
427 for (pr = fu->nextpr;; pr = pr->nextpr)
430 for (p1 = pr->fmt, p2 = NULL; *p1; ++p1)
431 p2 = isspace(*p1) ? p1 : NULL;
437 for (fu = fs->nextfu; fu; fu = fu->nextfu) {
438 (void)printf("fmt:");
439 for (pr = fu->nextpr; pr; pr = pr->nextpr)
440 (void)printf(" {%s}", pr->fmt);
451 /* alphabetic escape sequences have to be done in place */
452 for (p2 = p1;; ++p1, ++p2) {
491 errx(1, "%s: bad byte count", s);
497 errx(1, "%%s: requires a precision or a byte count");
501 badfmt(const char *fmt)
503 errx(1, "\"%s\": bad format", fmt);
509 errx(1, "%%%s: bad conversion character", ch);