base64.c
2.58 KB
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/* GNU mailutils - a suite of utilities for electronic mail
Copyright (C) 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include <unistd.h>
#include <stdio.h>
#include <assert.h>
#include <ctype.h>
#include <string.h>
#include <mailutils/mailutils.h>
int
main (int argc, char * argv [])
{
stream_t in, out, flt;
unsigned char buffer;
int c, verbose = 0;
int printable = 0;
size_t size, total = 0;
int mode = MU_FILTER_ENCODE;
char *input = NULL, *output = NULL;
while ((c = getopt (argc, argv, "dehi:o:pv")) != EOF)
switch (c)
{
case 'i':
input = optarg;
break;
case 'o':
output = optarg;
break;
case 'd':
mode = MU_FILTER_DECODE;
break;
case 'e':
mode = MU_FILTER_ENCODE;
break;
case 'p':
printable = 1;
break;
case 'v':
verbose = 1;
break;
case 'h':
printf ("usage: base64 [-vpde][-i infile][-o outfile]\n");
exit (0);
default:
exit (1);
}
if (input)
c = file_stream_create (&in, input, MU_STREAM_READ);
else
c = stdio_stream_create (&in, stdin, 0);
assert (c == 0);
assert (filter_create (&flt, in, "base64", mode, MU_STREAM_READ) == 0);
assert (stream_open (in) == 0);
if (output)
c = file_stream_create (&out, output, MU_STREAM_WRITE|MU_STREAM_CREAT);
else
c = stdio_stream_create (&out, stdout, 0);
assert (c == 0);
assert (stream_open (out) == 0);
while (stream_read (flt, &buffer, sizeof (buffer), total, &size) == 0
&& size > 0)
{
if (printable && !isprint (buffer))
{
char outbuf[24];
sprintf (outbuf, "\\%03o", (unsigned int) buffer);
stream_write (out, outbuf, strlen (outbuf), total, NULL);
}
else
stream_write (out, &buffer, size, total, NULL);
total += size;
}
stream_write (out, "\n", 1, total, NULL);
stream_close (in);
stream_close (out);
if (verbose)
fprintf (stderr, "total: %lu bytes\n", (unsigned long) total);
return 0;
}