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git.ipfire.org Git - thirdparty/util-linux.git/blob - text-utils/parse.c
2 * Copyright (c) 1989 The Regents of the University of California.
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
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 /* 1999-02-22 Arkadiusz Mi¶kiewicz <misiek@pld.ORG.PL>
35 * - added Native Language Support
38 #include <sys/types.h>
47 static void escape(char *p1
);
48 static void badcnt(const char *s
);
49 static void badsfmt(void);
50 static void badfmt(const char *fmt
);
51 static void badconv(const char *ch
);
53 FU
*endfu
; /* format at end-of-data */
55 void addfile(char *name
)
62 if ((fp
= fopen(name
, "r")) == NULL
) {
63 (void)fprintf(stderr
, _("hexdump: can't read %s.\n"), name
);
66 while (fgets(buf
, sizeof(buf
), fp
)) {
67 if ((p
= index(buf
, '\n')) == NULL
) {
68 (void)fprintf(stderr
, _("hexdump: line too long.\n"));
69 while ((ch
= getchar()) != '\n' && ch
!= EOF
);
73 for (p
= buf
; *p
&& isspace((unsigned char)*p
); ++p
);
81 void add(const char *fmt
)
89 /* Start new linked list of format units. */
90 tfs
= emalloc(sizeof(FS
));
95 nextfs
= &tfs
->nextfs
;
96 nextfu
= &tfs
->nextfu
;
98 /* Take the format string and break it up into format units. */
100 /* Skip leading white space. */
101 for (; isspace((unsigned char)*p
); ++p
);
105 /* Allocate a new format unit and link it in. */
106 tfu
= emalloc(sizeof(FU
));
108 nextfu
= &tfu
->nextfu
;
111 /* If leading digit, repetition count. */
112 if (isdigit((unsigned char)*p
)) {
113 for (savep
= p
; isdigit((unsigned char)*p
); ++p
);
114 if (!isspace((unsigned char)*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((unsigned char)*p
); ++p
);
123 /* Skip slash and trailing white space. */
125 while (isspace((unsigned char)*++p
));
128 if (isdigit((unsigned char)*p
)) {
129 for (savep
= p
; isdigit((unsigned char)*p
); ++p
);
130 if (!isspace((unsigned char)*p
))
132 tfu
->bcnt
= atoi(savep
);
133 /* skip trailing white space */
134 for (++p
; isspace((unsigned char)*p
); ++p
);
140 for (savep
= ++p
; *p
!= '"';)
143 if (!(tfu
->fmt
= malloc(p
- savep
+ 1)))
145 (void) strncpy(tfu
->fmt
, savep
, p
- savep
);
146 tfu
->fmt
[p
- savep
] = '\0';
152 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((unsigned char)*++fmt
)) {
177 while (isdigit((unsigned char)*++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
;
208 enum { NOTOKAY
, USEBCNT
, USEPREC
} sokay
;
212 char savech
, *fmtp
, cs
[3];
218 for (fu
= fs
->nextfu
; fu
; fu
= fu
->nextfu
) {
220 * Break each format unit into print units; each
221 * conversion character gets its own.
223 for (nconv
= 0, fmtp
= fu
->fmt
; *fmtp
; nextpr
= &pr
->nextpr
) {
224 pr
= emalloc(sizeof(PR
));
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
));
252 isdigit((unsigned char)*++p1
)) {
255 while (isdigit((unsigned char)*++p1
));
260 p2
= p1
+ 1; /* Set end pointer. */
261 cs
[0] = *p1
; /* Set conversion string. */
265 * Figure out the byte count for each conversion;
266 * rewrite the format as necessary, set up blank-
267 * padding for end of data.
284 case 'o': case 'u': case 'x': case 'X':
307 case 'e': case 'E': case 'f': case 'g': case 'G':
339 fu
->flags
|= F_IGNORE
;
342 pr
->flags
= F_ADDRESS
;
345 case 'd': case 'o': case'x':
357 /* cs[0] = 'c'; set in conv_c */
365 /* cs[0] = 'c'; set in conv_u */
366 isint2
: switch(fu
->bcnt
) {
386 * Copy to PR format string, set conversion character
387 * pointer, update original.
391 pr
->fmt
= emalloc(strlen(fmtp
) + strlen(cs
) + 1);
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 (void)fprintf(stderr
,
401 _("hexdump: byte count with multiple conversion characters.\n"));
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((unsigned char)*p1
) ? p1
: NULL
;
439 static void escape(char *p1
)
443 /* alphabetic escape sequences have to be done in place */
444 for (p2
= p1
;; ++p1
, ++p2
) {
480 static void badcnt(const char *s
)
482 (void)fprintf(stderr
,
483 _("hexdump: bad byte count for conversion character %s.\n"), s
);
487 static void badsfmt(void)
489 (void)fprintf(stderr
,
490 _("hexdump: %%s requires a precision or a byte count.\n"));
494 static void badfmt(const char *fmt
)
496 (void)fprintf(stderr
, _("hexdump: bad format {%s}\n"), fmt
);
500 static void badconv(const char *ch
)
502 (void)fprintf(stderr
, _("hexdump: bad conversion character %%%s.\n"), ch
);