1 /* $OpenBSD: binary.c,v 1.9 2003/09/18 22:29:30 beck Exp $ */ 2 3 /*- 4 * Copyright (c) 1999 James Howard and Dag-Erling Co�dan Sm�rgrav 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <ctype.h> 30 #include <stdio.h> 31 #include <zlib.h> 32 33 #include "grep.h" 34 35 int 36 bin_file(FILE *f) 37 { 38 char buf[BUFSIZ]; 39 int i, m; 40 41 if (fseek(f, 0L, SEEK_SET) == -1) 42 return 0; 43 44 if ((m = (int)fread(buf, 1, BUFSIZ, f)) == 0) 45 return 0; 46 47 for (i = 0; i < m; i++) 48 if (!isprint(buf[i]) && !isspace(buf[i])) 49 return 1; 50 51 rewind(f); 52 return 0; 53 } 54 55 #ifndef NOZ 56 int 57 gzbin_file(gzFile *f) 58 { 59 char buf[BUFSIZ]; 60 int i, m; 61 62 if (gzseek(f, 0L, SEEK_SET) == -1) 63 return 0; 64 65 if ((m = gzread(f, buf, BUFSIZ)) == 0) 66 return 0; 67 68 for (i = 0; i < m; i++) 69 if (!isprint(buf[i]) && !isspace(buf[i])) 70 return 1; 71 72 gzrewind(f); 73 return 0; 74 } 75 #endif 76 77 int 78 mmbin_file(mmf_t *f) 79 { 80 int i; 81 82 /* XXX knows too much about mmf internals */ 83 for (i = 0; i < BUFSIZ && i < f->len; i++) 84 if (!isprint(f->base[i]) && !isspace(f->base[i])) 85 return 1; 86 mmrewind(f); 87 return 0; 88 } 89