original openbsd freegrep

2010-06-20 11:49:38 +00:00
parent 5b40436aaf
commit 1d14529942
10 changed files with 2192 additions and 0 deletions
--- a/commands/grep/binary.c
+++ b/commands/grep/binary.c
@@ -0,0 +1,96 @@
+/*	$OpenBSD: binary.c,v 1.14 2005/02/07 08:47:18 otto 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 "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
+
+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;
+}