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/* $OpenBSD: binary.c,v 1.16 2010/07/02 20:48:48 nicm Exp $ */
/*-
* Copyright (c) 1999 James Howard and Dag-Erling Coïdan Smørgrav
* 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 <zlib.h>
#include "grep.h"
#define isbinary(ch) (!isprint((ch)) && !isspace((ch)) && (ch) != '\b')
int
bin_file(FILE *f)
{
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)
{
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
#ifndef SMALL
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;
}
#endif
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