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Simtel MSDOS 1996 June
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Simtel-MSDOS-Jun1996-CD1.iso
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xxencode.c
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1996-02-24
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#ifndef lint
static char sccsid[] = "@(#)xxencode.c 5.3 (Berkeley) 1/22/85";
#endif
/*
* xxencode [input] output
*
* Encode a file so it can be mailed to a remote system.
*/
#include <stdio.h>
#ifdef MSDOS
#include <fcntl.h>
#include <io.h>
#endif /* MSDOS */
#ifndef VMCMS
#include <sys/types.h>
#include <sys/stat.h>
#else /* VMCMS */
#include <types.h>
#include <stat.h>
#define perror(string) fprintf (stderr, "%s\n", string)
#endif /* VMCMS */
/* ENC is the basic 1 character encoding function to make a char printing */
#define ENC(c) ( set[ (c) & 077 ] )
static char set[] =
"+-0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
main (argc, argv)
int argc;
char * argv [];
{
FILE *in;
struct stat sbuf;
int mode;
char buffer [256];
int i;
/* optional 1st argument */
if (argc > 2)
{
strcpy (buffer, argv [1]);
#ifdef VMCMS
for (i = 2; i < argc - 1; i++)
{
strcat (buffer, " ");
strcat (buffer, argv [i]);
}
strcat (buffer, " (bin");
#endif /* VMCMS */
if ((in = fopen (buffer, "r")) == NULL)
{
perror (buffer);
exit(1);
}
}
else
in = stdin;
#ifdef MSDOS
if (setmode (fileno (in), O_BINARY) == -1)
{
perror ("Cannot open input file as binary\n");
exit (3);
}
#endif /* MSDOS */
#ifndef VMCMS
if (isatty (fileno (in)) || argc < 2 || argc > 3)
{
fprintf (stderr, "Usage: xxencode [infile] remotefile\n");
exit(2);
}
#else
if (isatty (fileno (in)) || argc < 2)
{
fprintf (stderr, "Usage: xxencode fn ft fm (bin options remotefile ");
fprintf (stderr, "> fn ft fm\n");
fprintf (stderr, " or: xxencode remotefile < fn ft fm (bin options ");
fprintf (stderr, "> fn ft fm\n");
fprintf (stderr, "remotefile is a Unix syntax filename.\n");
exit(2);
}
#endif /* VMCMS */
/* figure out the input file mode */
fstat (fileno (in), &sbuf);
#ifndef VMCMS
mode = sbuf.st_mode & 0777;
#else
mode = 0700;
#endif /* VMCMS */
printf ("begin %o %s\n", mode, argv [argc - 1]);
encode (in, stdout);
printf ("end\n");
exit (0);
}
/*
* copy from in to out, encoding as you go along.
*/
encode(in, out)
FILE *in;
FILE *out;
{
char buf[80];
int i, n;
for (;;) {
/* 1 (up to) 45 character line */
n = fr(in, buf, 45);
putc(ENC(n), out);
for (i=0; i<n; i += 3)
outdec(&buf[i], out);
putc('\n', out);
if (n <= 0)
break;
}
}
/*
* output one group of 3 bytes, pointed at by p, on file f.
*/
outdec(p, f)
char *p;
FILE *f;
{
int c1, c2, c3, c4;
c1 = *p >> 2;
c2 = (*p << 4) & 060 | (p[1] >> 4) & 017;
c3 = (p[1] << 2) & 074 | (p[2] >> 6) & 03;
c4 = p[2] & 077;
putc(ENC(c1), f);
putc(ENC(c2), f);
putc(ENC(c3), f);
putc(ENC(c4), f);
}
/* fr: like read but stdio */
int
fr(fd, buf, cnt)
FILE *fd;
char *buf;
int cnt;
{
int c, i;
for (i=0; i<cnt; i++) {
c = getc(fd);
if (c == EOF)
return(i);
buf[i] = c;
}
return (cnt);
}