2 * Copyright (c) 1989, 1993
3 * The Regents of the University of California. All rights reserved.
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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.
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30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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
);