1 /* $OpenBSD: binary.c,v 1.6 2003/06/25 04:03:47 tedu 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 #define BUFFER_SIZE 32 36 37 int 38 bin_file(FILE *f) 39 { 40 char buf[BUFFER_SIZE]; 41 int i, m; 42 43 if (fseek(f, 0L, SEEK_SET) == -1) 44 return 0; 45 46 if ((m = (int)fread(buf, 1, BUFFER_SIZE, f)) == 0) 47 return 0; 48 49 for (i = 0; i < m; i++) 50 if (!isprint(buf[i]) && !isspace(buf[i])) 51 return 1; 52 53 rewind(f); 54 return 0; 55 } 56 57 #ifndef NOZ 58 int 59 gzbin_file(gzFile *f) 60 { 61 char buf[BUFFER_SIZE]; 62 int i, m; 63 64 if (gzseek(f, 0L, SEEK_SET) == -1) 65 return 0; 66 67 if ((m = (int)gzread(f, buf, BUFFER_SIZE)) == 0) 68 return 0; 69 70 for (i = 0; i < m; i++) 71 if (!isprint(buf[i])) 72 return 1; 73 74 gzrewind(f); 75 return 0; 76 } 77 #endif 78 79 int 80 mmbin_file(mmf_t *f) 81 { 82 int i; 83 84 /* XXX knows too much about mmf internals */ 85 for (i = 0; i < BUFFER_SIZE && i < f->len; i++) 86 if (!isprint(f->base[i]) && !isspace(f->base[i])) 87 return 1; 88 mmrewind(f); 89 return 0; 90 } 91