2010-06-20 13:54:40 +02:00
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/* $OpenBSD: binary.c,v 1.14 2005/02/07 08:47:18 otto Exp $ */
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/*-
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* Copyright (c) 1999 James Howard and Dag-Erling Co<EFBFBD>dan Sm<EFBFBD>rgrav
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <ctype.h>
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#include <err.h>
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#include <stdio.h>
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#include "grep.h"
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#define isbinary(ch) (!isprint((ch)) && !isspace((ch)) && (ch) != '\b')
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int
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bin_file(FILE *f)
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{
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2010-06-20 14:31:55 +02:00
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unsigned char buf[BUFSIZ];
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2010-06-20 13:54:40 +02:00
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size_t i, m;
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int ret = 0;
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if (fseek(f, 0L, SEEK_SET) == -1)
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return 0;
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if ((m = fread(buf, 1, BUFSIZ, f)) == 0)
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return 0;
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for (i = 0; i < m; i++)
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if (isbinary(buf[i])) {
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ret = 1;
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break;
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}
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rewind(f);
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return ret;
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}
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#ifndef NOZ
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int
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gzbin_file(gzFile *f)
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{
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2010-06-20 14:31:55 +02:00
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unsigned char buf[BUFSIZ];
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2010-06-20 13:54:40 +02:00
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int i, m;
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int ret = 0;
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if (gzseek(f, (z_off_t)0, SEEK_SET) == -1)
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return 0;
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if ((m = gzread(f, buf, BUFSIZ)) <= 0)
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return 0;
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for (i = 0; i < m; i++)
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if (isbinary(buf[i])) {
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ret = 1;
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break;
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}
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if (gzrewind(f) != 0)
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err(1, "gzbin_file");
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return ret;
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}
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#endif
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int
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mmbin_file(mmf_t *f)
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{
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int i;
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/* XXX knows too much about mmf internals */
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for (i = 0; i < BUFSIZ && i < f->len; i++)
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if (isbinary(f->base[i]))
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return 1;
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return 0;
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}
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