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/* $MidnightBSD$ */ |
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/* |
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* Copyright (c) 1989, 1993 |
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* The Regents of the University of California. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 4. Neither the name of the University nor the names of its contributors |
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* may be used to endorse or promote products derived from this software |
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* without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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*/ |
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|
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#ifndef lint |
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#if 0 |
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static char sccsid[] = "@(#)parse.c 8.1 (Berkeley) 6/6/93"; |
| 34 |
#endif |
| 35 |
#endif /* not lint */ |
| 36 |
#include <sys/cdefs.h> |
| 37 |
__FBSDID("$FreeBSD: stable/10/usr.bin/hexdump/parse.c 262926 2014-03-08 12:24:47Z brueffer $"); |
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|
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#include <sys/types.h> |
| 40 |
|
| 41 |
#include <err.h> |
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#include <fcntl.h> |
| 43 |
#include <stdio.h> |
| 44 |
#include <stdlib.h> |
| 45 |
#include <ctype.h> |
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#include <string.h> |
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#include "hexdump.h" |
| 48 |
|
| 49 |
FU *endfu; /* format at end-of-data */ |
| 50 |
|
| 51 |
void |
| 52 |
addfile(char *name) |
| 53 |
{ |
| 54 |
unsigned char *p; |
| 55 |
FILE *fp; |
| 56 |
int ch; |
| 57 |
char buf[2048 + 1]; |
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|
| 59 |
if ((fp = fopen(name, "r")) == NULL) |
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err(1, "%s", name); |
| 61 |
while (fgets(buf, sizeof(buf), fp)) { |
| 62 |
if (!(p = strchr(buf, '\n'))) { |
| 63 |
warnx("line too long"); |
| 64 |
while ((ch = getchar()) != '\n' && ch != EOF); |
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continue; |
| 66 |
} |
| 67 |
*p = '\0'; |
| 68 |
for (p = buf; *p && isspace(*p); ++p); |
| 69 |
if (!*p || *p == '#') |
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continue; |
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add(p); |
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} |
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(void)fclose(fp); |
| 74 |
} |
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|
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void |
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add(const char *fmt) |
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{ |
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unsigned const char *p, *savep; |
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static FS **nextfs; |
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FS *tfs; |
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FU *tfu, **nextfu; |
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|
| 84 |
/* start new linked list of format units */ |
| 85 |
if ((tfs = calloc(1, sizeof(FS))) == NULL) |
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err(1, NULL); |
| 87 |
if (!fshead) |
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fshead = tfs; |
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else |
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*nextfs = tfs; |
| 91 |
nextfs = &tfs->nextfs; |
| 92 |
nextfu = &tfs->nextfu; |
| 93 |
|
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/* take the format string and break it up into format units */ |
| 95 |
for (p = fmt;;) { |
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/* skip leading white space */ |
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for (; isspace(*p); ++p); |
| 98 |
if (!*p) |
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break; |
| 100 |
|
| 101 |
/* allocate a new format unit and link it in */ |
| 102 |
if ((tfu = calloc(1, sizeof(FU))) == NULL) |
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err(1, NULL); |
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*nextfu = tfu; |
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nextfu = &tfu->nextfu; |
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tfu->reps = 1; |
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|
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/* if leading digit, repetition count */ |
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if (isdigit(*p)) { |
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for (savep = p; isdigit(*p); ++p); |
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if (!isspace(*p) && *p != '/') |
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badfmt(fmt); |
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/* may overwrite either white space or slash */ |
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tfu->reps = atoi(savep); |
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tfu->flags = F_SETREP; |
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/* skip trailing white space */ |
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for (++p; isspace(*p); ++p); |
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} |
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|
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/* skip slash and trailing white space */ |
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if (*p == '/') |
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while (isspace(*++p)); |
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|
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/* byte count */ |
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if (isdigit(*p)) { |
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for (savep = p; isdigit(*p); ++p); |
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if (!isspace(*p)) |
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badfmt(fmt); |
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tfu->bcnt = atoi(savep); |
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/* skip trailing white space */ |
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for (++p; isspace(*p); ++p); |
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} |
| 133 |
|
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/* format */ |
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if (*p != '"') |
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badfmt(fmt); |
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for (savep = ++p; *p != '"';) |
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if (*p++ == 0) |
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badfmt(fmt); |
| 140 |
if (!(tfu->fmt = malloc(p - savep + 1))) |
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err(1, NULL); |
| 142 |
(void) strlcpy(tfu->fmt, savep, p - savep + 1); |
| 143 |
escape(tfu->fmt); |
| 144 |
p++; |
| 145 |
} |
| 146 |
} |
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|
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static const char *spec = ".#-+ 0123456789"; |
| 149 |
|
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int |
| 151 |
size(FS *fs) |
| 152 |
{ |
| 153 |
FU *fu; |
| 154 |
int bcnt, cursize; |
| 155 |
unsigned char *fmt; |
| 156 |
int prec; |
| 157 |
|
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/* figure out the data block size needed for each format unit */ |
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for (cursize = 0, fu = fs->nextfu; fu; fu = fu->nextfu) { |
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if (fu->bcnt) { |
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cursize += fu->bcnt * fu->reps; |
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continue; |
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} |
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for (bcnt = prec = 0, fmt = fu->fmt; *fmt; ++fmt) { |
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if (*fmt != '%') |
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continue; |
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/* |
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* skip any special chars -- save precision in |
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* case it's a %s format. |
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*/ |
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while (strchr(spec + 1, *++fmt)); |
| 172 |
if (*fmt == '.' && isdigit(*++fmt)) { |
| 173 |
prec = atoi(fmt); |
| 174 |
while (isdigit(*++fmt)); |
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} |
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switch(*fmt) { |
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case 'c': |
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bcnt += 1; |
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break; |
| 180 |
case 'd': case 'i': case 'o': case 'u': |
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case 'x': case 'X': |
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bcnt += 4; |
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break; |
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case 'e': case 'E': case 'f': case 'g': case 'G': |
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bcnt += 8; |
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break; |
| 187 |
case 's': |
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bcnt += prec; |
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break; |
| 190 |
case '_': |
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switch(*++fmt) { |
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case 'c': case 'p': case 'u': |
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bcnt += 1; |
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break; |
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} |
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} |
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} |
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cursize += bcnt * fu->reps; |
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} |
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return (cursize); |
| 201 |
} |
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|
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void |
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rewrite(FS *fs) |
| 205 |
{ |
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enum { NOTOKAY, USEBCNT, USEPREC } sokay; |
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PR *pr, **nextpr; |
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FU *fu; |
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unsigned char *p1, *p2, *fmtp; |
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char savech, cs[3]; |
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int nconv, prec; |
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size_t len; |
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|
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prec = 0; |
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|
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for (fu = fs->nextfu; fu; fu = fu->nextfu) { |
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/* |
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* Break each format unit into print units; each conversion |
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* character gets its own. |
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*/ |
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nextpr = &fu->nextpr; |
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for (nconv = 0, fmtp = fu->fmt; *fmtp; nextpr = &pr->nextpr) { |
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if ((pr = calloc(1, sizeof(PR))) == NULL) |
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err(1, NULL); |
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*nextpr = pr; |
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|
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/* Skip preceding text and up to the next % sign. */ |
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for (p1 = fmtp; *p1 && *p1 != '%'; ++p1); |
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|
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/* Only text in the string. */ |
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if (!*p1) { |
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pr->fmt = fmtp; |
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pr->flags = F_TEXT; |
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break; |
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} |
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|
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/* |
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* Get precision for %s -- if have a byte count, don't |
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* need it. |
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*/ |
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if (fu->bcnt) { |
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sokay = USEBCNT; |
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/* Skip to conversion character. */ |
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for (++p1; strchr(spec, *p1); ++p1); |
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} else { |
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/* Skip any special chars, field width. */ |
| 247 |
while (strchr(spec + 1, *++p1)); |
| 248 |
if (*p1 == '.' && isdigit(*++p1)) { |
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sokay = USEPREC; |
| 250 |
prec = atoi(p1); |
| 251 |
while (isdigit(*++p1)); |
| 252 |
} else |
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sokay = NOTOKAY; |
| 254 |
} |
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|
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p2 = *p1 ? p1 + 1 : p1; /* Set end pointer -- make sure |
| 257 |
* that it's non-NUL/-NULL first |
| 258 |
* though. */ |
| 259 |
cs[0] = *p1; /* Set conversion string. */ |
| 260 |
cs[1] = '\0'; |
| 261 |
|
| 262 |
/* |
| 263 |
* Figure out the byte count for each conversion; |
| 264 |
* rewrite the format as necessary, set up blank- |
| 265 |
* padding for end of data. |
| 266 |
*/ |
| 267 |
switch(cs[0]) { |
| 268 |
case 'c': |
| 269 |
pr->flags = F_CHAR; |
| 270 |
switch(fu->bcnt) { |
| 271 |
case 0: case 1: |
| 272 |
pr->bcnt = 1; |
| 273 |
break; |
| 274 |
default: |
| 275 |
p1[1] = '\0'; |
| 276 |
badcnt(p1); |
| 277 |
} |
| 278 |
break; |
| 279 |
case 'd': case 'i': |
| 280 |
pr->flags = F_INT; |
| 281 |
goto isint; |
| 282 |
case 'o': case 'u': case 'x': case 'X': |
| 283 |
pr->flags = F_UINT; |
| 284 |
isint: cs[2] = '\0'; |
| 285 |
cs[1] = cs[0]; |
| 286 |
cs[0] = 'q'; |
| 287 |
switch(fu->bcnt) { |
| 288 |
case 0: case 4: |
| 289 |
pr->bcnt = 4; |
| 290 |
break; |
| 291 |
case 1: |
| 292 |
pr->bcnt = 1; |
| 293 |
break; |
| 294 |
case 2: |
| 295 |
pr->bcnt = 2; |
| 296 |
break; |
| 297 |
default: |
| 298 |
p1[1] = '\0'; |
| 299 |
badcnt(p1); |
| 300 |
} |
| 301 |
break; |
| 302 |
case 'e': case 'E': case 'f': case 'g': case 'G': |
| 303 |
pr->flags = F_DBL; |
| 304 |
switch(fu->bcnt) { |
| 305 |
case 0: case 8: |
| 306 |
pr->bcnt = 8; |
| 307 |
break; |
| 308 |
case 4: |
| 309 |
pr->bcnt = 4; |
| 310 |
break; |
| 311 |
default: |
| 312 |
if (fu->bcnt == sizeof(long double)) { |
| 313 |
cs[2] = '\0'; |
| 314 |
cs[1] = cs[0]; |
| 315 |
cs[0] = 'L'; |
| 316 |
pr->bcnt = sizeof(long double); |
| 317 |
} else { |
| 318 |
p1[1] = '\0'; |
| 319 |
badcnt(p1); |
| 320 |
} |
| 321 |
} |
| 322 |
break; |
| 323 |
case 's': |
| 324 |
pr->flags = F_STR; |
| 325 |
switch(sokay) { |
| 326 |
case NOTOKAY: |
| 327 |
badsfmt(); |
| 328 |
case USEBCNT: |
| 329 |
pr->bcnt = fu->bcnt; |
| 330 |
break; |
| 331 |
case USEPREC: |
| 332 |
pr->bcnt = prec; |
| 333 |
break; |
| 334 |
} |
| 335 |
break; |
| 336 |
case '_': |
| 337 |
++p2; |
| 338 |
switch(p1[1]) { |
| 339 |
case 'A': |
| 340 |
endfu = fu; |
| 341 |
fu->flags |= F_IGNORE; |
| 342 |
/* FALLTHROUGH */ |
| 343 |
case 'a': |
| 344 |
pr->flags = F_ADDRESS; |
| 345 |
++p2; |
| 346 |
switch(p1[2]) { |
| 347 |
case 'd': case 'o': case'x': |
| 348 |
cs[0] = 'q'; |
| 349 |
cs[1] = p1[2]; |
| 350 |
cs[2] = '\0'; |
| 351 |
break; |
| 352 |
default: |
| 353 |
p1[3] = '\0'; |
| 354 |
badconv(p1); |
| 355 |
} |
| 356 |
break; |
| 357 |
case 'c': |
| 358 |
pr->flags = F_C; |
| 359 |
/* cs[0] = 'c'; set in conv_c */ |
| 360 |
goto isint2; |
| 361 |
case 'p': |
| 362 |
pr->flags = F_P; |
| 363 |
cs[0] = 'c'; |
| 364 |
goto isint2; |
| 365 |
case 'u': |
| 366 |
pr->flags = F_U; |
| 367 |
/* cs[0] = 'c'; set in conv_u */ |
| 368 |
isint2: switch(fu->bcnt) { |
| 369 |
case 0: case 1: |
| 370 |
pr->bcnt = 1; |
| 371 |
break; |
| 372 |
default: |
| 373 |
p1[2] = '\0'; |
| 374 |
badcnt(p1); |
| 375 |
} |
| 376 |
break; |
| 377 |
default: |
| 378 |
p1[2] = '\0'; |
| 379 |
badconv(p1); |
| 380 |
} |
| 381 |
break; |
| 382 |
default: |
| 383 |
p1[1] = '\0'; |
| 384 |
badconv(p1); |
| 385 |
} |
| 386 |
|
| 387 |
/* |
| 388 |
* Copy to PR format string, set conversion character |
| 389 |
* pointer, update original. |
| 390 |
*/ |
| 391 |
savech = *p2; |
| 392 |
p1[0] = '\0'; |
| 393 |
len = strlen(fmtp) + strlen(cs) + 1; |
| 394 |
if ((pr->fmt = calloc(1, len)) == NULL) |
| 395 |
err(1, NULL); |
| 396 |
snprintf(pr->fmt, len, "%s%s", fmtp, cs); |
| 397 |
*p2 = savech; |
| 398 |
pr->cchar = pr->fmt + (p1 - fmtp); |
| 399 |
fmtp = p2; |
| 400 |
|
| 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"); |
| 404 |
} |
| 405 |
/* |
| 406 |
* If format unit byte count not specified, figure it out |
| 407 |
* so can adjust rep count later. |
| 408 |
*/ |
| 409 |
if (!fu->bcnt) |
| 410 |
for (pr = fu->nextpr; pr; pr = pr->nextpr) |
| 411 |
fu->bcnt += pr->bcnt; |
| 412 |
} |
| 413 |
/* |
| 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. |
| 418 |
* |
| 419 |
* If, rep count is greater than 1, no trailing whitespace |
| 420 |
* gets output from the last iteration of the format unit. |
| 421 |
*/ |
| 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; |
| 426 |
if (fu->reps > 1) { |
| 427 |
for (pr = fu->nextpr;; pr = pr->nextpr) |
| 428 |
if (!pr->nextpr) |
| 429 |
break; |
| 430 |
for (p1 = pr->fmt, p2 = NULL; *p1; ++p1) |
| 431 |
p2 = isspace(*p1) ? p1 : NULL; |
| 432 |
if (p2) |
| 433 |
pr->nospace = p2; |
| 434 |
} |
| 435 |
} |
| 436 |
#ifdef DEBUG |
| 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); |
| 441 |
(void)printf("\n"); |
| 442 |
} |
| 443 |
#endif |
| 444 |
} |
| 445 |
|
| 446 |
void |
| 447 |
escape(char *p1) |
| 448 |
{ |
| 449 |
char *p2; |
| 450 |
|
| 451 |
/* alphabetic escape sequences have to be done in place */ |
| 452 |
for (p2 = p1;; p1++, p2++) { |
| 453 |
if (*p1 == '\\') { |
| 454 |
p1++; |
| 455 |
switch(*p1) { |
| 456 |
case '\0': |
| 457 |
*p2 = '\\'; |
| 458 |
*++p2 = '\0'; |
| 459 |
return; |
| 460 |
case 'a': |
| 461 |
/* *p2 = '\a'; */ |
| 462 |
*p2 = '\007'; |
| 463 |
break; |
| 464 |
case 'b': |
| 465 |
*p2 = '\b'; |
| 466 |
break; |
| 467 |
case 'f': |
| 468 |
*p2 = '\f'; |
| 469 |
break; |
| 470 |
case 'n': |
| 471 |
*p2 = '\n'; |
| 472 |
break; |
| 473 |
case 'r': |
| 474 |
*p2 = '\r'; |
| 475 |
break; |
| 476 |
case 't': |
| 477 |
*p2 = '\t'; |
| 478 |
break; |
| 479 |
case 'v': |
| 480 |
*p2 = '\v'; |
| 481 |
break; |
| 482 |
default: |
| 483 |
*p2 = *p1; |
| 484 |
break; |
| 485 |
} |
| 486 |
} else { |
| 487 |
*p2 = *p1; |
| 488 |
if (*p1 == '\0') |
| 489 |
return; |
| 490 |
} |
| 491 |
} |
| 492 |
} |
| 493 |
|
| 494 |
void |
| 495 |
badcnt(char *s) |
| 496 |
{ |
| 497 |
errx(1, "%s: bad byte count", s); |
| 498 |
} |
| 499 |
|
| 500 |
void |
| 501 |
badsfmt(void) |
| 502 |
{ |
| 503 |
errx(1, "%%s: requires a precision or a byte count"); |
| 504 |
} |
| 505 |
|
| 506 |
void |
| 507 |
badfmt(const char *fmt) |
| 508 |
{ |
| 509 |
errx(1, "\"%s\": bad format", fmt); |
| 510 |
} |
| 511 |
|
| 512 |
void |
| 513 |
badconv(char *ch) |
| 514 |
{ |
| 515 |
errx(1, "%%%s: bad conversion character", ch); |
| 516 |
} |
