X-Git-Url: https://git.saurik.com/apple/file_cmds.git/blobdiff_plain/440bd1982b8e55068af44543d97888092d61feee..6c780a1f93b6cb2162f563ddae2d48867866f44c:/file/is_tar.c

diff --git a/file/is_tar.c b/file/is_tar.c
deleted file mode 100644
index 5efe88c..0000000
--- a/file/is_tar.c
+++ /dev/null
@@ -1,124 +0,0 @@
-/*
- * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
- *
- * @APPLE_LICENSE_HEADER_START@
- * 
- * Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
- * Reserved.  This file contains Original Code and/or Modifications of
- * Original Code as defined in and that are subject to the Apple Public
- * Source License Version 1.1 (the "License").  You may not use this file
- * except in compliance with the License.  Please obtain a copy of the
- * License at http://www.apple.com/publicsource and read it before using
- * this file.
- * 
- * The Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON- INFRINGEMENT.  Please see the
- * License for the specific language governing rights and limitations
- * under the License.
- * 
- * @APPLE_LICENSE_HEADER_END@
- */
-/*	$OpenBSD: is_tar.c,v 1.3 1997/02/09 23:58:27 millert Exp $	*/
-
-/*
- * is_tar() -- figure out whether file is a tar archive.
- *
- * Stolen (by the author!) from the public domain tar program:
- * Pubic Domain version written 26 Aug 1985 John Gilmore (ihnp4!hoptoad!gnu).
- *
- * @(#)list.c 1.18 9/23/86 Public Domain - gnu
- *
- * Comments changed and some code/comments reformatted
- * for file command by Ian Darwin.
- */
-
-#include <string.h>
-#include <ctype.h>
-#include <sys/types.h>
-#include "tar.h"
-
-#define	isodigit(c)	( ((c) >= '0') && ((c) <= '7') )
-
-#if	defined(__STDC__) || defined(__cplusplus)
-static int from_oct(int, char*);	/* Decode octal number */
-#else
-static int from_oct();
-#endif
-
-/*
- * Return 
- *	0 if the checksum is bad (i.e., probably not a tar archive), 
- *	1 for old UNIX tar file,
- *	2 for Unix Std (POSIX) tar file.
- */
-int
-is_tar(buf, nbytes)
-unsigned char *buf;
-int nbytes;
-{
-	register union record *header = (union record *)buf;
-	register int	i;
-	register int	sum, recsum;
-	register char	*p;
-
-	if (nbytes < sizeof(union record))
-		return 0;
-
-	recsum = from_oct(8,  header->header.chksum);
-
-	sum = 0;
-	p = header->charptr;
-	for (i = sizeof(union record); --i >= 0;) {
-		/*
-		 * We can't use unsigned char here because of old compilers,
-		 * e.g. V7.
-		 */
-		sum += 0xFF & *p++;
-	}
-
-	/* Adjust checksum to count the "chksum" field as blanks. */
-	for (i = sizeof(header->header.chksum); --i >= 0;)
-		sum -= 0xFF & header->header.chksum[i];
-	sum += ' '* sizeof header->header.chksum;	
-
-	if (sum != recsum)
-		return 0;	/* Not a tar archive */
-	
-	if (0==strcmp(header->header.magic, TMAGIC)) 
-		return 2;		/* Unix Standard tar archive */
-
-	return 1;			/* Old fashioned tar archive */
-}
-
-
-/*
- * Quick and dirty octal conversion.
- *
- * Result is -1 if the field is invalid (all blank, or nonoctal).
- */
-static int
-from_oct(digs, where)
-	register int	digs;
-	register char	*where;
-{
-	register int	value;
-
-	while (isspace(*where)) {		/* Skip spaces */
-		where++;
-		if (--digs <= 0)
-			return -1;		/* All blank field */
-	}
-	value = 0;
-	while (digs > 0 && isodigit(*where)) {	/* Scan til nonoctal */
-		value = (value << 3) | (*where++ - '0');
-		--digs;
-	}
-
-	if (digs > 0 && *where && !isspace(*where))
-		return -1;			/* Ended on non-space/nul */
-
-	return value;
-}