Return to binary.c CVS log

Up to [local] / src / usr.bin / grep

Annotation of src/usr.bin/grep/binary.c, Revision 1.7

1.7     ! millert     1: /*     $OpenBSD: binary.c,v 1.6 2003/06/25 04:03:47 tedu Exp $ */
1.4       deraadt     2:
1.1       deraadt     3: /*-
                      4:  * Copyright (c) 1999 James Howard and Dag-Erling Coïdan Smørgrav
                      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:
1.2       deraadt    43:        if (fseek(f, 0L, SEEK_SET) == -1)
1.1       deraadt    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:
1.3       deraadt    57: #ifndef NOZ
1.1       deraadt    58: int
                     59: gzbin_file(gzFile *f)
                     60: {
                     61:        char            buf[BUFFER_SIZE];
                     62:        int             i, m;
                     63:
1.6       tedu       64:        if (gzseek(f, 0L, SEEK_SET) == -1)
1.1       deraadt    65:                return 0;
                     66:
1.7     ! millert    67:        if ((m = gzread(f, buf, BUFFER_SIZE)) == 0)
1.1       deraadt    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: }
1.3       deraadt    77: #endif
1.1       deraadt    78:
                     79: int
                     80: mmbin_file(mmf_t *f)
                     81: {
                     82:        int i;
1.3       deraadt    83:
1.1       deraadt    84:        /* XXX knows too much about mmf internals */
                     85:        for (i = 0; i < BUFFER_SIZE && i < f->len; i++)
1.5       tedu       86:                if (!isprint(f->base[i]) && !isspace(f->base[i]))
1.1       deraadt    87:                        return 1;
                     88:        mmrewind(f);
                     89:        return 0;
                     90: }