/*
* 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
static char sccsid[] = "@(#)display.c 8.1 (Berkeley) 6/6/93";
#endif /* not lint */
#include <sys/param.h>
#include <sys/stat.h>
#include <unistd.h>
#include <errno.h>
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.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;
u_char *tmpp;
if (!curp) {
curp = emalloc(blocksize);
savp = emalloc(blocksize);
} else {
tmpp = curp;
curp = savp;
savp = tmpp;
address += blocksize;
}
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 && !bcmp(curp, savp, nread)) {
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))
(void)fprintf(stderr, "hexdump: %s: %s\n",
_argv[-1], strerror(errno));
ateof = 1;
continue;
}
ateof = 0;
if (length != -1)
length -= n;
if (!(need -= n)) {
if (vflag == ALL || vflag == FIRST ||
bcmp(curp, savp, blocksize)) {
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))) {
(void)fprintf(stderr, "hexdump: %s: %s\n",
*_argv, strerror(errno));
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("%s: %s", fname, strerror(errno));
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("%s: %s", fname, strerror(errno));
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("%s", strerror(errno));
}
