Usenet 1994 October/usenetsourcesnewsgroupsinfomagicoctober1994disk2.iso/misc/volume5/bsplit

Internet Message Format | 1989-02-03 | 5KB

Path: xanth!nic.MR.NET!hal!ncoast!allbery
From: [e-mail] (Peter Knoppers, Delft Univ. of Technology)
Newsgroups: comp.sources.misc
Subject: v05i083: bsplit - a split-like program for binary files
Message-ID: <[e-mail]>
Date: 14 Dec 88 03:10:06 GMT
Sender: [e-mail]
Reply-To: [e-mail] (Peter Knoppers, Delft Univ. of Technology)
Organization: DELFT UNIVERSITY OF TECHNOLOGY Faculty of Electrical Engineering Computer architecture and Digital Technique Mekelweg 4   -   2628 CD  Delft
Lines: 162
Approved: [e-mail]

Posting-number: Volume 5, Issue 83
Submitted-by: "Peter Knoppers, Delft Univ. of Technology" <[e-mail]>
Archive-name: bsplit

Below follows my program bsplit.c. It is a short and simple program
that we use rather often. Manual is not included, as the use is
almost identical to that of the un*x split program. As furnished
it compiles and works on the systems that I tried. It may not
work on systems where ints are 16 bits. For local use you may
change this program into anything you like.

Modified versions must not be re-distributed. Distribution of the
original version with diff is OK. If someone really improves this,
mail the diffs to me, so that I can re-post the really-improved
version. The copyright message is there to prevent uncontrolled
spreading of many slightly different versions.

My present email address is [e-mail], this will soon
change to [e-mail].

#! /bin/sh
# This file was wrapped with "dummyshar".  "sh" this file to extract.
# Contents:  bsplit.c
echo extracting 'bsplit.c'
if test -f 'bsplit.c' -a -z "$1"; then echo Not overwriting 'bsplit.c'; else
sed 's/^X//' << \EOF > 'bsplit.c'
X/*
X * bsplit.c - split binary files in manageable pieces.
X * usage is exactly like the split program.
X *
X * This program was written from scratch, without looking at the
X * sources of split.
X *
X * Copyright (C) 1988 P. Knoppers
X *                    Bilderdijkhof 59
X *                    2624 ZG  Delft
X *                    The Netherlands
X */
X
Xchar copy0[] = "Copyright (C) 1988 P. Knoppers";
Xchar copy1[] = "Permission to use and distribute copies of this";
Xchar copy2[] = "program WITH SOURCE is granted to anyone, provided";
Xchar copy3[] = "that it is NOT CHANGED in any way.";
X
X#include <stdio.h>
X#define DEFSIZE 50000
X#define DEFPREFIX "x"
X#define MAXNAME 200
X
Xchar   *malloc ();
X
Xmain (argc, argv)        /* bsplit - split binary file */
Xchar   *argv[];
X{
X    char   *buf;
X    char   *myname;
X    int     bulksize = DEFSIZE;
X    int     level;
X    int     got;
X    int     fno = 0;
X    char    outfname[MAXNAME + 1];
X    char    outbase[MAXNAME + 3];
X    int     foundinname = 0;
X    FILE * infile = stdin;
X    FILE * outfile;
X
X    myname = *argv;
X    strcpy (outbase, DEFPREFIX);
X    while (--argc > 0)
X    {
X    argv++;
X    if ((*argv)[0] == '-')
X    {
X        if ((*argv)[1] == '\0')
X        {
X        if (foundinname != 0)
X        {
X            fprintf (stderr,
X                "usage: %s [-size] [file [prefix]]\n",
X                myname);
X            exit (1);
X        }
X        foundinname++;
X        }
X        else
X        if (sscanf (*argv, "-%d", &bulksize) != 1)
X        {
X            fprintf (stderr,
X                "usage: %s [-size] [file [prefix]]\n",
X                myname);
X            exit (1);
X        }
X    }
X    else
X        if (foundinname != 0)
X        {
X        if (strlen (*argv) > MAXNAME)
X        {
X            fprintf (stderr, "%s: prefix too long\n",
X                myname);
X            exit (1);
X        }
X        strcpy (outbase, *argv);
X        }
X        else
X        {
X        if ((infile = fopen (*argv, "r")) == NULL)
X        {
X            fprintf (stderr, "%s: cannot open %s\n",
X                myname, *argv);
X            exit (1);
X        }
X        foundinname++;
X        }
X    }
X
X    if ((buf = malloc (bulksize)) == NULL)
X    {
X    fprintf (stderr, "%s: malloc failed\n", myname);
X    exit (1);
X    }
X    level = 0;
X    while (1)
X    {
X    got = read (fileno (infile), &buf[level], bulksize - level);
X    level += got;
X    if ((level < bulksize) && (got > 0))
X        continue;
X    if ((level == bulksize) || ((got == 0) && (level > 0)))
X    {
X        sprintf (outfname, "%s%c%c", outbase, fno / 26 + 'a',
X            fno % 26 + 'a');
X        if ((outfile = fopen (outfname, "w")) == NULL)
X        {
X        fprintf (stderr, "%s: cannot create %s\n", myname,
X            outfname);
X        exit (1);
X        }
X        if (write (fileno (outfile), buf, level) != level)
X        {
X        fprintf (stderr, "%s: write failed\n", myname);
X        exit (1);
X        }
X        fclose (outfile);
X        level = 0;
X        fno++;
X    }
X    if (got == 0)
X        break;
X    }
X}
EOF
chars=`wc -c < 'bsplit.c'`
if test $chars !=    2804; then echo 'bsplit.c' is $chars characters, should be    2804 characters!; fi
fi
exit 0
--
 _____      __  __  __  __   ____   _____   _____   ______  _____    _____
|  _  \    |  |/  ||  \|  | /    \ |  _  \ |  _  \ |   ___||  _  \  /  ___|
|   __/ _  |     < |      ||  ||  ||   __/ |   __/ |   >__ |     <  \__  \
|__|   |_| |__|\__||__|\__| \____/ |__|    |__|    |______||__|\__||_____/
P. Knoppers, Delft Univ. of Technology, The Netherlands - [e-mail]