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/*
* 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"
#include "xalloc.h"
#include "c.h"
#include "nls.h"
static void doskip(const char *, int);
static u_char *get(void);
enum _vflag vflag = FIRST;
static off_t address; /* address/offset in stream */
static off_t eaddress; /* end address */
static inline void
print(PR *pr, unsigned char *bp) {
switch(pr->flags) {
case F_ADDRESS:
(void)printf(pr->fmt, (int64_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:
{
double dval;
float fval;
switch(pr->bcnt) {
case 4:
memmove(&fval, bp, sizeof(fval));
(void)printf(pr->fmt, fval);
break;
case 8:
memmove(&dval, bp, sizeof(dval));
(void)printf(pr->fmt, dval);
break;
}
break;
}
case F_INT:
{
short sval; /* int16_t */
int ival; /* int32_t */
long long Lval; /* int64_t, int64_t */
switch(pr->bcnt) {
case 1:
(void)printf(pr->fmt, (int64_t)*bp);
break;
case 2:
memmove(&sval, bp, sizeof(sval));
(void)printf(pr->fmt, (int64_t)sval);
break;
case 4:
memmove(&ival, bp, sizeof(ival));
(void)printf(pr->fmt, (int64_t)ival);
break;
case 8:
memmove(&Lval, bp, sizeof(Lval));
(void)printf(pr->fmt, (int64_t)Lval);
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("%s", pr->fmt);
break;
case F_U:
conv_u(pr, bp);
break;
case F_UINT:
{
unsigned short sval; /* u_int16_t */
unsigned int ival; /* u_int32_t */
unsigned long long Lval;/* u_int64_t, u_int64_t */
switch(pr->bcnt) {
case 1:
(void)printf(pr->fmt, (uint64_t)*bp);
break;
case 2:
memmove(&sval, bp, sizeof(sval));
(void)printf(pr->fmt, (uint64_t)sval);
break;
case 4:
memmove(&ival, bp, sizeof(ival));
(void)printf(pr->fmt, (uint64_t)ival);
break;
case 8:
memmove(&Lval, bp, sizeof(Lval));
(void)printf(pr->fmt, (uint64_t)Lval);
break;
}
break;
}
}
}
static void bpad(PR *pr)
{
static const char *spec = " -0+#";
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 && strchr(spec, *p1); ++p1);
while ((*p2++ = *p1++) != 0) ;
}
void display(void)
{
register FS *fs;
register FU *fu;
register PR *pr;
register int cnt;
register unsigned char *bp;
off_t saveaddress;
unsigned char savech = 0, *savebp;
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(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, (int64_t)eaddress);
break;
case F_TEXT:
(void)printf("%s", pr->fmt);
break;
}
}
}
static char **_argv;
static u_char *
get(void)
{
static int ateof = 1;
static u_char *curp, *savp;
ssize_t n, need, nread;
u_char *tmpp;
if (!curp) {
curp = xcalloc(1, blocksize);
savp = xcalloc(1, 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(NULL))) {
if (need == blocksize)
return(NULL);
if (!need && vflag != ALL &&
!memcmp(curp, savp, nread)) {
if (vflag != DUP)
(void)printf("*\n");
return(NULL);
}
if (need > 0)
memset((char *)curp + nread, 0, need);
eaddress = address + nread;
return(curp);
}
if (fileno(stdin) == -1) {
warnx(_("all input file arguments failed"));
return(NULL);
}
n = fread((char *)curp + nread, sizeof(unsigned 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 ||
memcmp(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;
}
}
int next(char **argv)
{
static int done;
int statok;
if (argv) {
_argv = argv;
return(1);
}
for (;;) {
if (*_argv) {
if (!(freopen(*_argv, "r", stdin))) {
warn("%s", *_argv);
exitval = EXIT_FAILURE;
++_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(const char *fname, int statok)
{
struct stat sbuf;
if (statok) {
if (fstat(fileno(stdin), &sbuf))
err(EXIT_FAILURE, "%s", fname);
if (S_ISREG(sbuf.st_mode) && skip > sbuf.st_size) {
/* If size valid and skip >= size */
skip -= sbuf.st_size;
address += sbuf.st_size;
return;
}
}
/* sbuf may be undefined here - do not test it */
if (fseek(stdin, skip, SEEK_SET))
err(EXIT_FAILURE, "%s", fname);
address += skip;
skip = 0;
}
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