/*
* Copyright (c) 1989 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.
*/
#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"
static void doskip(char *, int);
#ifndef MIN
#define MIN(a,b) ((a)<(b)?(a):(b))
#endif
enum _vflag vflag = FIRST;
static off_t address; /* address/offset in stream */
static off_t eaddress; /* end address */
static off_t savaddress; /* saved address/offset in stream */
#define PRINT { \
switch(pr->flags) { \
case F_ADDRESS: \
(void)printf(pr->fmt, 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: { \
double dval; \
float fval; \
switch(pr->bcnt) { \
case 4: \
bcopy((char *)bp, (char *)&fval, sizeof(fval)); \
(void)printf(pr->fmt, fval); \
break; \
case 8: \
bcopy((char *)bp, (char *)&dval, sizeof(dval)); \
(void)printf(pr->fmt, dval); \
break; \
} \
break; \
} \
case F_INT: { \
int ival; \
short sval; \
switch(pr->bcnt) { \
case 1: \
(void)printf(pr->fmt, (int)*bp); \
break; \
case 2: \
bcopy((char *)bp, (char *)&sval, sizeof(sval)); \
(void)printf(pr->fmt, (int)sval); \
break; \
case 4: \
bcopy((char *)bp, (char *)&ival, sizeof(ival)); \
(void)printf(pr->fmt, ival); \
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: { \
u_int ival; \
u_short sval; \
switch(pr->bcnt) { \
case 1: \
(void)printf(pr->fmt, (u_int)*bp); \
break; \
case 2: \
bcopy((char *)bp, (char *)&sval, sizeof(sval)); \
(void)printf(pr->fmt, (u_int)sval); \
break; \
case 4: \
bcopy((char *)bp, (char *)&ival, sizeof(ival)); \
(void)printf(pr->fmt, ival); \
break; \
} \
break; \
} \
} \
}
void bpad(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 = 's';
for (p1 = pr->fmt; *p1 != '%'; ++p1);
for (p2 = ++p1; *p1 && index(spec, *p1); ++p1);
while ((*p2++ = *p1++) != 0) ;
}
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 = 0, *savebp, *get();
while ((bp = get()) != NULL)
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;
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, eaddress);
break;
case F_TEXT:
(void)printf(pr->fmt);
break;
}
}
}
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 = (u_char *)emalloc(blocksize);
savp = (u_char *)emalloc(blocksize);
} else {
tmpp = curp;
curp = savp;
savp = tmpp;
address = savaddress += 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 = savaddress += blocksize;
need = blocksize;
nread = 0;
}
else
nread += n;
}
}
int next(char **argv)
{
extern int errno, 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 */
}
static void
doskip(char *fname, int statok)
{
extern int errno;
struct stat sbuf;
if (statok) {
if (fstat(fileno(stdin), &sbuf)) {
(void)fprintf(stderr, "hexdump: %s: %s.\n",
fname, strerror(errno));
exit(1);
}
if ( ( ! (S_ISCHR(sbuf.st_mode) ||
S_ISBLK(sbuf.st_mode) ||
S_ISFIFO(sbuf.st_mode)) ) &&
skip >= sbuf.st_size) {
/* If size valid and skip >= size */
skip -= sbuf.st_size;
address += sbuf.st_size;
return;
}
}
if (fseek(stdin, skip, SEEK_SET)) {
(void)fprintf(stderr, "hexdump: %s: %s.\n",
fname, strerror(errno));
exit(1);
}
savaddress = address += skip;
skip = 0;
}
char *
emalloc(int size)
{
char *p;
if (!(p = malloc((u_int)size)))
nomem();
bzero(p, size);
return(p);
}
void nomem()
{
extern int errno;
(void)fprintf(stderr, "hexdump: %s.\n", strerror(errno));
exit(1);
}
