97 lines
2.4 KiB
C
97 lines
2.4 KiB
C
|
/* $OpenBSD: binary.c,v 1.14 2005/02/07 08:47:18 otto Exp $ */
|
|||
|
|
|
|||
|
|
/*-
|
|||
|
|
* Copyright (c) 1999 James Howard and Dag-Erling Co<EFBFBD>dan Sm<EFBFBD>rgrav
|
|||
|
|
* 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.
|
|||
|
|
*
|
|||
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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 <ctype.h>
|
|||
|
|
#include <err.h>
|
|||
|
|
#include <stdio.h>
|
|||
|
|
|
|||
|
|
#include "grep.h"
|
|||
|
|
|
|||
|
|
#define isbinary(ch) (!isprint((ch)) && !isspace((ch)) && (ch) != '\b')
|
|||
|
|
|
|||
|
|
int
|
|||
|
|
bin_file(FILE *f)
|
|||
|
|
{
|
|||
|
|
unsigned char buf[BUFSIZ];
|
|||
|
|
size_t i, m;
|
|||
|
|
int ret = 0;
|
|||
|
|
|
|||
|
|
if (fseek(f, 0L, SEEK_SET) == -1)
|
|||
|
|
return 0;
|
|||
|
|
|
|||
|
|
if ((m = fread(buf, 1, BUFSIZ, f)) == 0)
|
|||
|
|
return 0;
|
|||
|
|
|
|||
|
|
for (i = 0; i < m; i++)
|
|||
|
|
if (isbinary(buf[i])) {
|
|||
|
|
ret = 1;
|
|||
|
|
break;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
rewind(f);
|
|||
|
|
return ret;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
#ifndef NOZ
|
|||
|
|
int
|
|||
|
|
gzbin_file(gzFile *f)
|
|||
|
|
{
|
|||
|
|
unsigned char buf[BUFSIZ];
|
|||
|
|
int i, m;
|
|||
|
|
int ret = 0;
|
|||
|
|
|
|||
|
|
if (gzseek(f, (z_off_t)0, SEEK_SET) == -1)
|
|||
|
|
return 0;
|
|||
|
|
|
|||
|
|
if ((m = gzread(f, buf, BUFSIZ)) <= 0)
|
|||
|
|
return 0;
|
|||
|
|
|
|||
|
|
for (i = 0; i < m; i++)
|
|||
|
|
if (isbinary(buf[i])) {
|
|||
|
|
ret = 1;
|
|||
|
|
break;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (gzrewind(f) != 0)
|
|||
|
|
err(1, "gzbin_file");
|
|||
|
|
return ret;
|
|||
|
|
}
|
|||
|
|
#endif
|
|||
|
|
|
|||
|
|
int
|
|||
|
|
mmbin_file(mmf_t *f)
|
|||
|
|
{
|
|||
|
|
int i;
|
|||
|
|
|
|||
|
|
/* XXX knows too much about mmf internals */
|
|||
|
|
for (i = 0; i < BUFSIZ && i < f->len; i++)
|
|||
|
|
if (isbinary(f->base[i]))
|
|||
|
|
return 1;
|
|||
|
|
return 0;
|
|||
|
|
}
|