b001517f54
Fix bug with od/hd/hexdump. "*" lines are supposed to indicate one or
duplicates of the previous line, but a small file with less then 16
characters of zeros in it will be falsy identified as a repeat of
the (non-existant) previous line. i.e. the first line of output winds
up being a "*". Added a bit of code to handle the degenerate 'there is
no previous line' case for the first line.
387 lines
8.2 KiB
C
387 lines
8.2 KiB
C
/*
|
|
* Copyright (c) 1989, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#ifndef lint
|
|
#if 0
|
|
static char sccsid[] = "@(#)display.c 8.1 (Berkeley) 6/6/93";
|
|
#endif
|
|
static const char rcsid[] =
|
|
"$Id: display.c,v 1.2 1997/07/10 06:48:12 charnier Exp $";
|
|
#endif /* not lint */
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/stat.h>
|
|
|
|
#include <ctype.h>
|
|
#include <err.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include "hexdump.h"
|
|
|
|
enum _vflag vflag = FIRST;
|
|
|
|
static off_t address; /* address/offset in stream */
|
|
static off_t eaddress; /* end address */
|
|
|
|
static inline void print __P((PR *, u_char *));
|
|
|
|
void
|
|
display()
|
|
{
|
|
extern FU *endfu;
|
|
register FS *fs;
|
|
register FU *fu;
|
|
register PR *pr;
|
|
register int cnt;
|
|
register u_char *bp;
|
|
off_t saveaddress;
|
|
u_char savech, *savebp;
|
|
|
|
while (bp = get())
|
|
for (fs = fshead, savebp = bp, saveaddress = address; fs;
|
|
fs = fs->nextfs, bp = savebp, address = saveaddress)
|
|
for (fu = fs->nextfu; fu; fu = fu->nextfu) {
|
|
if (fu->flags&F_IGNORE)
|
|
break;
|
|
for (cnt = fu->reps; cnt; --cnt)
|
|
for (pr = fu->nextpr; pr; address += pr->bcnt,
|
|
bp += pr->bcnt, pr = pr->nextpr) {
|
|
if (eaddress && address >= eaddress &&
|
|
!(pr->flags & (F_TEXT|F_BPAD)))
|
|
bpad(pr);
|
|
if (cnt == 1 && pr->nospace) {
|
|
savech = *pr->nospace;
|
|
*pr->nospace = '\0';
|
|
}
|
|
print(pr, bp);
|
|
if (cnt == 1 && pr->nospace)
|
|
*pr->nospace = savech;
|
|
}
|
|
}
|
|
if (endfu) {
|
|
/*
|
|
* If eaddress not set, error or file size was multiple of
|
|
* blocksize, and no partial block ever found.
|
|
*/
|
|
if (!eaddress) {
|
|
if (!address)
|
|
return;
|
|
eaddress = address;
|
|
}
|
|
for (pr = endfu->nextpr; pr; pr = pr->nextpr)
|
|
switch(pr->flags) {
|
|
case F_ADDRESS:
|
|
(void)printf(pr->fmt, (quad_t)eaddress);
|
|
break;
|
|
case F_TEXT:
|
|
(void)printf(pr->fmt);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
static inline void
|
|
print(pr, bp)
|
|
PR *pr;
|
|
u_char *bp;
|
|
{
|
|
double f8;
|
|
float f4;
|
|
int16_t s2;
|
|
int8_t s8;
|
|
int32_t s4;
|
|
u_int16_t u2;
|
|
u_int32_t u4;
|
|
u_int64_t u8;
|
|
|
|
switch(pr->flags) {
|
|
case F_ADDRESS:
|
|
(void)printf(pr->fmt, (quad_t)address);
|
|
break;
|
|
case F_BPAD:
|
|
(void)printf(pr->fmt, "");
|
|
break;
|
|
case F_C:
|
|
conv_c(pr, bp);
|
|
break;
|
|
case F_CHAR:
|
|
(void)printf(pr->fmt, *bp);
|
|
break;
|
|
case F_DBL:
|
|
switch(pr->bcnt) {
|
|
case 4:
|
|
bcopy(bp, &f4, sizeof(f4));
|
|
(void)printf(pr->fmt, f4);
|
|
break;
|
|
case 8:
|
|
bcopy(bp, &f8, sizeof(f8));
|
|
(void)printf(pr->fmt, f8);
|
|
break;
|
|
}
|
|
break;
|
|
case F_INT:
|
|
switch(pr->bcnt) {
|
|
case 1:
|
|
(void)printf(pr->fmt, (quad_t)*bp);
|
|
break;
|
|
case 2:
|
|
bcopy(bp, &s2, sizeof(s2));
|
|
(void)printf(pr->fmt, (quad_t)s2);
|
|
break;
|
|
case 4:
|
|
bcopy(bp, &s4, sizeof(s4));
|
|
(void)printf(pr->fmt, (quad_t)s4);
|
|
break;
|
|
case 8:
|
|
bcopy(bp, &s8, sizeof(s8));
|
|
(void)printf(pr->fmt, s8);
|
|
break;
|
|
}
|
|
break;
|
|
case F_P:
|
|
(void)printf(pr->fmt, isprint(*bp) ? *bp : '.');
|
|
break;
|
|
case F_STR:
|
|
(void)printf(pr->fmt, (char *)bp);
|
|
break;
|
|
case F_TEXT:
|
|
(void)printf(pr->fmt);
|
|
break;
|
|
case F_U:
|
|
conv_u(pr, bp);
|
|
break;
|
|
case F_UINT:
|
|
switch(pr->bcnt) {
|
|
case 1:
|
|
(void)printf(pr->fmt, (u_quad_t)*bp);
|
|
break;
|
|
case 2:
|
|
bcopy(bp, &u2, sizeof(u2));
|
|
(void)printf(pr->fmt, (u_quad_t)u2);
|
|
break;
|
|
case 4:
|
|
bcopy(bp, &u4, sizeof(u4));
|
|
(void)printf(pr->fmt, (u_quad_t)u4);
|
|
break;
|
|
case 8:
|
|
bcopy(bp, &u8, sizeof(u8));
|
|
(void)printf(pr->fmt, u8);
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
void
|
|
bpad(pr)
|
|
PR *pr;
|
|
{
|
|
static char *spec = " -0+#";
|
|
register char *p1, *p2;
|
|
|
|
/*
|
|
* Remove all conversion flags; '-' is the only one valid
|
|
* with %s, and it's not useful here.
|
|
*/
|
|
pr->flags = F_BPAD;
|
|
pr->cchar[0] = 's';
|
|
pr->cchar[1] = '\0';
|
|
for (p1 = pr->fmt; *p1 != '%'; ++p1);
|
|
for (p2 = ++p1; *p1 && index(spec, *p1); ++p1);
|
|
while (*p2++ = *p1++);
|
|
}
|
|
|
|
static char **_argv;
|
|
|
|
u_char *
|
|
get()
|
|
{
|
|
extern enum _vflag vflag;
|
|
extern int length;
|
|
static int ateof = 1;
|
|
static u_char *curp, *savp;
|
|
register int n;
|
|
int need, nread;
|
|
int valid_save = 0;
|
|
u_char *tmpp;
|
|
|
|
if (!curp) {
|
|
curp = emalloc(blocksize);
|
|
savp = emalloc(blocksize);
|
|
} else {
|
|
tmpp = curp;
|
|
curp = savp;
|
|
savp = tmpp;
|
|
address += blocksize;
|
|
valid_save = 1;
|
|
}
|
|
for (need = blocksize, nread = 0;;) {
|
|
/*
|
|
* if read the right number of bytes, or at EOF for one file,
|
|
* and no other files are available, zero-pad the rest of the
|
|
* block and set the end flag.
|
|
*/
|
|
if (!length || ateof && !next((char **)NULL)) {
|
|
if (need == blocksize)
|
|
return((u_char *)NULL);
|
|
if (vflag != ALL &&
|
|
valid_save &&
|
|
bcmp(curp, savp, nread) == 0) {
|
|
if (vflag != DUP)
|
|
(void)printf("*\n");
|
|
return((u_char *)NULL);
|
|
}
|
|
bzero((char *)curp + nread, need);
|
|
eaddress = address + nread;
|
|
return(curp);
|
|
}
|
|
n = fread((char *)curp + nread, sizeof(u_char),
|
|
length == -1 ? need : MIN(length, need), stdin);
|
|
if (!n) {
|
|
if (ferror(stdin))
|
|
warn("%s", _argv[-1]);
|
|
ateof = 1;
|
|
continue;
|
|
}
|
|
ateof = 0;
|
|
if (length != -1)
|
|
length -= n;
|
|
if (!(need -= n)) {
|
|
if (vflag == ALL || vflag == FIRST ||
|
|
valid_save == 0 ||
|
|
bcmp(curp, savp, blocksize) != 0) {
|
|
if (vflag == DUP || vflag == FIRST)
|
|
vflag = WAIT;
|
|
return(curp);
|
|
}
|
|
if (vflag == WAIT)
|
|
(void)printf("*\n");
|
|
vflag = DUP;
|
|
address += blocksize;
|
|
need = blocksize;
|
|
nread = 0;
|
|
}
|
|
else
|
|
nread += n;
|
|
}
|
|
}
|
|
|
|
extern off_t skip; /* bytes to skip */
|
|
|
|
int
|
|
next(argv)
|
|
char **argv;
|
|
{
|
|
extern int exitval;
|
|
static int done;
|
|
int statok;
|
|
|
|
if (argv) {
|
|
_argv = argv;
|
|
return(1);
|
|
}
|
|
for (;;) {
|
|
if (*_argv) {
|
|
if (!(freopen(*_argv, "r", stdin))) {
|
|
warn("%s", *_argv);
|
|
exitval = 1;
|
|
++_argv;
|
|
continue;
|
|
}
|
|
statok = done = 1;
|
|
} else {
|
|
if (done++)
|
|
return(0);
|
|
statok = 0;
|
|
}
|
|
if (skip)
|
|
doskip(statok ? *_argv : "stdin", statok);
|
|
if (*_argv)
|
|
++_argv;
|
|
if (!skip)
|
|
return(1);
|
|
}
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
void
|
|
doskip(fname, statok)
|
|
char *fname;
|
|
int statok;
|
|
{
|
|
register int cnt;
|
|
struct stat sb;
|
|
|
|
if (statok) {
|
|
if (fstat(fileno(stdin), &sb))
|
|
err(1, "%s", fname);
|
|
if (S_ISREG(sb.st_mode) && skip >= sb.st_size) {
|
|
address += sb.st_size;
|
|
skip -= sb.st_size;
|
|
return;
|
|
}
|
|
}
|
|
if (S_ISREG(sb.st_mode)) {
|
|
if (fseek(stdin, skip, SEEK_SET))
|
|
err(1, "%s", fname);
|
|
address += skip;
|
|
skip = 0;
|
|
} else {
|
|
for (cnt = 0; cnt < skip; ++cnt)
|
|
if (getchar() == EOF)
|
|
break;
|
|
address += cnt;
|
|
skip -= cnt;
|
|
}
|
|
}
|
|
|
|
void *
|
|
emalloc(size)
|
|
int size;
|
|
{
|
|
void *p;
|
|
|
|
if ((p = malloc((u_int)size)) == NULL)
|
|
nomem();
|
|
bzero(p, size);
|
|
return(p);
|
|
}
|
|
|
|
void
|
|
nomem()
|
|
{
|
|
err(1, NULL);
|
|
}
|