/* $NetBSD: odsyntax.c,v 1.28 2010/11/27 20:46:38 christos Exp $ */

/* $NetBSD: odsyntax.c,v 1.28 2010/11/27 20:46:38 christos Exp $ */

/*-
* Copyright (c) 1990, 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. 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.
*/

#if HAVE_NBTOOL_CONFIG_H
#include "nbtool_config.h"
#endif

#include <sys/cdefs.h>
#if !defined(lint)
#if 0
static char sccsid[] = "@(#)odsyntax.c 8.2 (Berkeley) 5/4/95";
#else
__RCSID("$NetBSD: odsyntax.c,v 1.28 2010/11/27 20:46:38 christos Exp $");
#endif
#endif /* not lint */

#include <sys/types.h>

#include <ctype.h>
#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <util.h>

#include "hexdump.h"

#define PADDING " "

struct odformat {
char type;
int nbytes;
char const *format;
int minwidth;
};

struct odaddrformat {
char type;
char const *format1;
char const *format2;
};

int odmode;

static void odoffset(int, char ***);
static void posixtypes(char const *);

void
odsyntax(int argc, char ***argvp)
{
static char empty[] = "", padding[] = PADDING;
int ch;
char *p, **argv;

#define TYPE_OFFSET 7
add("\"%07.7_Ao\n\"");
add("\"%07.7_ao \"");

odmode = 1;
argv = *argvp;
while ((ch = getopt(argc, argv,
"A:aBbcDdeFfHhIij:LlN:Oot:vXx")) != -1)
switch (ch) {
case 'A':
switch (*optarg) {
case 'd': case 'o': case 'x':
fshead->nextfu->fmt[TYPE_OFFSET] = *optarg;
fshead->nextfs->nextfu->fmt[TYPE_OFFSET] =
*optarg;
break;
case 'n':
fshead->nextfu->fmt = empty;
fshead->nextfs->nextfu->fmt = padding;
break;
default:
errx(1, "%s: invalid address base", optarg);
}
break;
case 'a':
posixtypes("a");
break;
case 'B':
case 'o':
posixtypes("o2");
break;
case 'b':
posixtypes("o1");
break;
case 'c':
posixtypes("c");
break;
case 'd':
posixtypes("u2");
break;
case 'D':
posixtypes("u4");
break;
case 'e': /* undocumented in od */
case 'F':
posixtypes("f8");
break;
case 'f':
posixtypes("f4");
break;
case 'H':
case 'X':
posixtypes("x4");
break;
case 'h':
case 'x':
posixtypes("x2");
break;
case 'I':
case 'L':
case 'l':
posixtypes("d4");
break;
case 'i':
posixtypes("d2");
break;
case 'j':
if ((skip = strtol(optarg, &p, 0)) < 0)
errx(1, "%s: bad skip value", optarg);
switch(*p) {
case 'b':
skip *= 512;
break;
case 'k':
skip *= 1024;
break;
case 'm':
skip *= 1048576;
break;
}
break;
case 'N':
if ((length = atoi(optarg)) < 0)
errx(1, "%s: bad length value", optarg);
break;
case 'O':
posixtypes("o4");
break;
case 't':
posixtypes(optarg);
break;
case 'v':
vflag = ALL;
break;
case '?':
default:
usage();
}

if (fshead->nextfs->nextfs == NULL)
posixtypes("oS");

argc -= optind;
*argvp += optind;

if (argc)
odoffset(argc, argvp);
}

/* formats used for -t */

static const struct odformat odftab[] = {
{ 'a', 1, "%3_u", 4 },
{ 'c', 1, "%3_c", 4 },
{ 'd', 1, "%4d", 5 },
{ 'd', 2, "%6d", 6 },
{ 'd', 4, "%11d", 11 },
{ 'd', 8, "%20d", 20 },
{ 'o', 1, "%03o", 4 },
{ 'o', 2, "%06o", 7 },
{ 'o', 4, "%011o", 12 },
{ 'o', 8, "%022o", 23 },
{ 'u', 1, "%03u" , 4 },
{ 'u', 2, "%05u" , 6 },
{ 'u', 4, "%010u", 11 },
{ 'u', 8, "%020u", 21 },
{ 'x', 1, "%02x", 3 },
{ 'x', 2, "%04x", 5 },
{ 'x', 4, "%08x", 9 },
{ 'x', 8, "%016x", 17 },
{ 'f', 4, "%14.7e", 15 },
{ 'f', 8, "%21.14e", 22 },
{ 0, 0, NULL, 0 }
};

/*
* Interpret a POSIX-style -t argument.
*/
static void
posixtypes(char const *type_string)
{
int nbytes = 0;
char *fmt, type, *tmp;
struct odformat const *odf;

while (*type_string) {
switch ((type = *type_string++)) {
case 'a':
case 'c':
nbytes = 1;
break;
case 'f':
if (isupper((unsigned char)*type_string)) {
switch(*type_string) {
case 'F':
nbytes = sizeof(float);
break;
case 'D':
nbytes = sizeof(double);
break;
case 'L':
nbytes = sizeof(long double);
break;
default:
warnx("Bad type-size qualifier '%c'",
*type_string);
usage();
}
type_string++;
} else if (isdigit((unsigned char)*type_string)) {
nbytes = strtol(type_string, &tmp, 10);
type_string = tmp;
} else
nbytes = 8;
break;
case 'd':
case 'o':
case 'u':
case 'x':
if (isupper((unsigned char)*type_string)) {
switch(*type_string) {
case 'C':
nbytes = sizeof(char);
break;
case 'S':
nbytes = sizeof(short);
break;
case 'I':
nbytes = sizeof(int);
break;
case 'L':
nbytes = sizeof(long);
break;
default:
warnx("Bad type-size qualifier '%c'",
*type_string);
usage();
}
type_string++;
} else if (isdigit((unsigned char)*type_string)) {
nbytes = strtol(type_string, &tmp, 10);
type_string = tmp;
} else
nbytes = 4;
break;
default:
usage();
}
for (odf = odftab; odf->type != 0; odf++)
if (odf->type == type && odf->nbytes == nbytes)
break;
if (odf->type == 0)
errx(1, "%c%d: format not supported", type, nbytes);
(void)easprintf(&fmt, "%d/%d \"%*s%s \" \"\\n\"",
16 / nbytes, nbytes,
4 * nbytes - odf->minwidth, "", odf->format);
add(fmt);
}
}

static void
odoffset(int argc, char ***argvp)
{
char *num, *p;
int base;
char *end;

/*
* The offset syntax of od(1) was genuinely bizarre. First, if
* it started with a plus it had to be an offset. Otherwise, if
* there were at least two arguments, a number or lower-case 'x'
* followed by a number makes it an offset. By default it was
* octal; if it started with 'x' or '0x' it was hex. If it ended
* in a '.', it was decimal. If a 'b' or 'B' was appended, it
* multiplied the number by 512 or 1024 byte units. There was
* no way to assign a block count to a hex offset.
*
* We assume it's a file if the offset is bad.
*/
p = argc == 1 ? (*argvp)[0] : (*argvp)[1];
if (!p)
return;

if (*p != '+' && (argc < 2 ||
(!isdigit((unsigned char)p[0]) &&
(p[0] != 'x' || !isxdigit((unsigned char)p[1])))))
return;

base = 0;
/*
* skip over leading '+', 'x[0-9a-fA-f]' or '0x', and
* set base.
*/
if (p[0] == '+')
++p;
if (p[0] == 'x' && isxdigit((unsigned char)p[1])) {
++p;
base = 16;
} else if (p[0] == '0' && p[1] == 'x') {
p += 2;
base = 16;
}

/* skip over the number */
if (base == 16)
for (num = p; isxdigit((unsigned char)*p); ++p);
else
for (num = p; isdigit((unsigned char)*p); ++p);

/* check for no number */
if (num == p)
return;

/* if terminates with a '.', base is decimal */
if (*p == '.') {
if (base)
return;
base = 10;
}

skip = strtol(num, &end, base ? base : 8);

/* if end isn't the same as p, we got a non-octal digit */
if (end != p) {
skip = 0;
return;
}

if (*p) {
if (*p == 'B') {
skip *= 1024;
++p;
} else if (*p == 'b') {
skip *= 512;
++p;
}
}
if (*p) {
skip = 0;
return;
}
/*
* If the offset uses a non-octal base, the base of the offset
* is changed as well. This isn't pretty, but it's easy.
*/
if (base == 16) {
fshead->nextfu->fmt[TYPE_OFFSET] = 'x';
fshead->nextfs->nextfu->fmt[TYPE_OFFSET] = 'x';
} else if (base == 10) {
fshead->nextfu->fmt[TYPE_OFFSET] = 'd';
fshead->nextfs->nextfu->fmt[TYPE_OFFSET] = 'd';
}

/* Terminate file list. */
(*argvp)[1] = NULL;
}