file_cmds-82.tar.gz

[apple/file_cmds.git] / file / ascmagic.c

diff --git a/file/ascmagic.c b/file/ascmagic.c
deleted file mode 100644 (file)
index ef4c484..0000000
--- a/file/ascmagic.c
+++ /dev/null
@@ -1,150 +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: ascmagic.c,v 1.3 1997/02/09 23:58:18 millert Exp $    */
-
-/*
- * ASCII magic -- file types that we know based on keywords
- * that can appear anywhere in the file.
- *
- * Copyright (c) Ian F. Darwin, 1987.
- * Written by Ian F. Darwin.
- *
- * This software is not subject to any license of the American Telephone
- * and Telegraph Company or of the Regents of the University of California.
- *
- * Permission is granted to anyone to use this software for any purpose on
- * any computer system, and to alter it and redistribute it freely, subject
- * to the following restrictions:
- *
- * 1. The author is not responsible for the consequences of use of this
- *    software, no matter how awful, even if they arise from flaws in it.
- *
- * 2. The origin of this software must not be misrepresented, either by
- *    explicit claim or by omission.  Since few users ever read sources,
- *    credits must appear in the documentation.
- *
- * 3. Altered versions must be plainly marked as such, and must not be
- *    misrepresented as being the original software.  Since few users
- *    ever read sources, credits must appear in the documentation.
- *
- * 4. This notice may not be removed or altered.
- */
-
-#include <stdio.h>
-#include <string.h>
-#include <ctype.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include "file.h"
-#include "names.h"
-
-#ifndef        lint
-#if 0
-static char *moduleid = "$OpenBSD: ascmagic.c,v 1.3 1997/02/09 23:58:18 millert Exp $";
-#endif
-#endif /* lint */
-
-                       /* an optimisation over plain strcmp() */
-#define        STREQ(a, b)     (*(a) == *(b) && strcmp((a), (b)) == 0)
-
-int
-ascmagic(buf, nbytes)
-unsigned char *buf;
-int nbytes;    /* size actually read */
-{
-       int i, has_escapes = 0;
-       unsigned char *s;
-       char nbuf[HOWMANY+1];   /* one extra for terminating '\0' */
-       char *token;
-       register struct names *p;
-
-       /*
-        * Do the tar test first, because if the first file in the tar
-        * archive starts with a dot, we can confuse it with an nroff file.
-        */
-       switch (is_tar(buf, nbytes)) {
-       case 1:
-               ckfputs("tar archive", stdout);
-               return 1;
-       case 2:
-               ckfputs("POSIX tar archive", stdout);
-               return 1;
-       }
-
-       /*
-        * for troff, look for . + letter + letter or .\";
-        * this must be done to disambiguate tar archives' ./file
-        * and other trash from real troff input.
-        */
-       if (*buf == '.') {
-               unsigned char *tp = buf + 1;
-
-               while (isascii(*tp) && isspace(*tp))
-                       ++tp;   /* skip leading whitespace */
-               if ((isascii(*tp) && (isalnum(*tp) || *tp=='\\') &&
-                   isascii(tp[1]) && (isalnum(tp[1]) || tp[1] == '"'))) {
-                       ckfputs("troff or preprocessor input text", stdout);
-                       return 1;
-               }
-       }
-       if ((*buf == 'c' || *buf == 'C') && 
-           isascii(buf[1]) && isspace(buf[1])) {
-               ckfputs("fortran program text", stdout);
-               return 1;
-       }
-
-
-       /* Make sure we are dealing with ascii text before looking for tokens */
-       for (i = 0; i < nbytes; i++) {
-               if (!isascii(buf[i]))
-                       return 0;       /* not all ASCII */
-       }
-
-       /* look for tokens from names.h - this is expensive! */
-       /* make a copy of the buffer here because strtok() will destroy it */
-       s = (unsigned char*) memcpy(nbuf, buf, nbytes);
-       s[nbytes] = '\0';
-       has_escapes = (memchr(s, '\033', nbytes) != NULL);
-       while ((token = strtok((char *) s, " \t\n\r\f")) != NULL) {
-               s = NULL;       /* make strtok() keep on tokin' */
-               for (p = names; p < names + NNAMES; p++) {
-                       if (STREQ(p->name, token)) {
-                               ckfputs(types[p->type], stdout);
-                               if (has_escapes)
-                                       ckfputs(" (with escape sequences)", 
-                                               stdout);
-                               return 1;
-                       }
-               }
-       }
-
-       /* all else fails, but it is ASCII... */
-       ckfputs("ASCII text", stdout);
-       if (has_escapes) {
-               ckfputs(" (with escape sequences)", stdout);
-       }
-       return 1;
-}
-
-