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FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //usr/src/usr.bin/hexdump/odsyntax.c |
/*-
* 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.
* 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[] = "@(#)odsyntax.c 8.2 (Berkeley) 5/4/95";
#endif
#endif /* not lint */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/usr.bin/hexdump/odsyntax.c 216370 2010-12-11 08:32:16Z joel $");
#include <sys/types.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <float.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "hexdump.h"
#define PADDING " "
int odmode;
static void odadd(const char *);
static void odformat(const char *);
static const char *odformatfp(char, const char *);
static const char *odformatint(char, const char *);
static void odoffset(int, char ***);
static void odusage(void);
void
oldsyntax(int argc, char ***argvp)
{
static char empty[] = "", padding[] = PADDING;
int ch;
char **argv, *end;
/* Add initial (default) address format. -A may change it later. */
#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:Oost: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':
odformat("a");
break;
case 'B':
case 'o':
odformat("o2");
break;
case 'b':
odformat("o1");
break;
case 'c':
odformat("c");
break;
case 'd':
odformat("u2");
break;
case 'D':
odformat("u4");
break;
case 'e': /* undocumented in od */
case 'F':
odformat("fD");
break;
case 'f':
odformat("fF");
break;
case 'H':
case 'X':
odformat("x4");
break;
case 'h':
case 'x':
odformat("x2");
break;
case 'I':
case 'L':
case 'l':
odformat("dL");
break;
case 'i':
odformat("dI");
break;
case 'j':
errno = 0;
skip = strtoll(optarg, &end, 0);
if (*end == 'b')
skip *= 512;
else if (*end == 'k')
skip *= 1024;
else if (*end == 'm')
skip *= 1048576L;
if (errno != 0 || skip < 0 || strlen(end) > 1)
errx(1, "%s: invalid skip amount", optarg);
break;
case 'N':
if ((length = atoi(optarg)) <= 0)
errx(1, "%s: invalid length", optarg);
break;
case 'O':
odformat("o4");
break;
case 's':
odformat("d2");
break;
case 't':
odformat(optarg);
break;
case 'v':
vflag = ALL;
break;
case '?':
default:
odusage();
}
if (fshead->nextfs->nextfs == NULL)
odformat("oS");
argc -= optind;
*argvp += optind;
if (argc)
odoffset(argc, argvp);
}
static void
odusage(void)
{
fprintf(stderr,
"usage: od [-aBbcDdeFfHhIiLlOosvXx] [-A base] [-j skip] [-N length] [-t type]\n");
fprintf(stderr,
" [[+]offset[.][Bb]] [file ...]\n");
exit(1);
}
static void
odoffset(int argc, char ***argvp)
{
char *p, *num, *end;
int base;
/*
* 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 != '+' && (argc < 2 ||
(!isdigit(p[0]) && (p[0] != 'x' || !isxdigit(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(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(*p); ++p);
else
for (num = p; isdigit(*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 = strtoll(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;
}
static void
odformat(const char *fmt)
{
char fchar;
while (*fmt != '\0') {
switch ((fchar = *fmt++)) {
case 'a':
odadd("16/1 \"%3_u \" \"\\n\"");
break;
case 'c':
odadd("16/1 \"%3_c \" \"\\n\"");
break;
case 'o': case 'u': case 'd': case 'x':
fmt = odformatint(fchar, fmt);
break;
case 'f':
fmt = odformatfp(fchar, fmt);
break;
default:
errx(1, "%c: unrecognised format character", fchar);
}
}
}
static const char *
odformatfp(char fchar __unused, const char *fmt)
{
size_t isize;
int digits;
char *end, *hdfmt;
isize = sizeof(double);
switch (*fmt) {
case 'F':
isize = sizeof(float);
fmt++;
break;
case 'D':
isize = sizeof(double);
fmt++;
break;
case 'L':
isize = sizeof(long double);
fmt++;
break;
default:
if (isdigit((unsigned char)*fmt)) {
errno = 0;
isize = (size_t)strtoul(fmt, &end, 10);
if (errno != 0 || isize == 0)
errx(1, "%s: invalid size", fmt);
fmt = (const char *)end;
}
}
switch (isize) {
case sizeof(float):
digits = FLT_DIG;
break;
case sizeof(double):
digits = DBL_DIG;
break;
default:
if (isize == sizeof(long double))
digits = LDBL_DIG;
else
errx(1, "unsupported floating point size %lu",
(u_long)isize);
}
asprintf(&hdfmt, "%lu/%lu \" %%%d.%de \" \"\\n\"",
16UL / (u_long)isize, (u_long)isize, digits + 8, digits);
if (hdfmt == NULL)
err(1, NULL);
odadd(hdfmt);
free(hdfmt);
return (fmt);
}
static const char *
odformatint(char fchar, const char *fmt)
{
unsigned long long n;
size_t isize;
int digits;
char *end, *hdfmt;
isize = sizeof(int);
switch (*fmt) {
case 'C':
isize = sizeof(char);
fmt++;
break;
case 'I':
isize = sizeof(int);
fmt++;
break;
case 'L':
isize = sizeof(long);
fmt++;
break;
case 'S':
isize = sizeof(short);
fmt++;
break;
default:
if (isdigit((unsigned char)*fmt)) {
errno = 0;
isize = (size_t)strtoul(fmt, &end, 10);
if (errno != 0 || isize == 0)
errx(1, "%s: invalid size", fmt);
if (isize != sizeof(char) && isize != sizeof(short) &&
isize != sizeof(int) && isize != sizeof(long))
errx(1, "unsupported int size %lu",
(u_long)isize);
fmt = (const char *)end;
}
}
/*
* Calculate the maximum number of digits we need to
* fit the number. Overestimate for decimal with log
* base 8. We need one extra space for signed numbers
* to store the sign.
*/
n = (1ULL << (8 * isize)) - 1;
digits = 0;
while (n != 0) {
digits++;
n >>= (fchar == 'x') ? 4 : 3;
}
if (fchar == 'd')
digits++;
asprintf(&hdfmt, "%lu/%lu \"%*s%%%s%d%c\" \"\\n\"",
16UL / (u_long)isize, (u_long)isize, (int)(4 * isize - digits),
"", (fchar == 'd' || fchar == 'u') ? "" : "0", digits, fchar);
if (hdfmt == NULL)
err(1, NULL);
odadd(hdfmt);
free(hdfmt);
return (fmt);
}
static void
odadd(const char *fmt)
{
static int needpad;
if (needpad)
add("\""PADDING"\"");
add(fmt);
needpad = 1;
}