File: [local] / src / usr.bin / grep / binary.c (download)
Revision 1.4, Sun Jun 22 22:38:50 2003 UTC (20 years, 11 months ago) by deraadt
Branch: MAIN
Changes since 1.3: +2 -2 lines
proper $OpenBSD$
|
/* $OpenBSD: binary.c,v 1.4 2003/06/22 22:38:50 deraadt 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 <stdio.h>
#include <zlib.h>
#include "grep.h"
#define BUFFER_SIZE 32
int
bin_file(FILE *f)
{
char buf[BUFFER_SIZE];
int i, m;
if (fseek(f, 0L, SEEK_SET) == -1)
return 0;
if ((m = (int)fread(buf, 1, BUFFER_SIZE, f)) == 0)
return 0;
for (i = 0; i < m; i++)
if (!isprint(buf[i]) && !isspace(buf[i]))
return 1;
rewind(f);
return 0;
}
#ifndef NOZ
int
gzbin_file(gzFile *f)
{
char buf[BUFFER_SIZE];
int i, m;
if (gzseek(f, SEEK_SET, 0) == -1)
return 0;
if ((m = (int)gzread(f, buf, BUFFER_SIZE)) == 0)
return 0;
for (i = 0; i < m; i++)
if (!isprint(buf[i]))
return 1;
gzrewind(f);
return 0;
}
#endif
int
mmbin_file(mmf_t *f)
{
int i;
/* XXX knows too much about mmf internals */
for (i = 0; i < BUFFER_SIZE && i < f->len; i++)
if (!isprint(f->base[i]))
return 1;
mmrewind(f);
return 0;
}