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mirror of https://git.savannah.gnu.org/git/emacs.git synced 2024-12-20 10:23:57 +00:00
emacs/lib-src/b2m.c
Thien-Thi Nguyen 3f0656ff20 (GOOD, BAD): Delete macros. Throughout,
replace w/ `EXIT_SUCCESS' and `EXIT_FAILURE', respectively.
(main): Use `EXIT_SUCCESS' or `EXIT_FAILURE' for return value.
2004-05-07 15:31:07 +00:00

299 lines
6.0 KiB
C

/*
* b2m - a filter for Babyl -> Unix mail files
* The copyright on this file has been disclaimed.
*
* usage: b2m < babyl > mailbox
*
* I find this useful whenever I have to use a
* system which - shock horror! - doesn't run
* GNU Emacs. At least now I can read all my
* GNU Emacs Babyl format mail files!
*
* it's not much but it's free!
*
* Ed Wilkinson
* E.Wilkinson@massey.ac.nz
* Mon Nov 7 15:54:06 PDT 1988
*/
/* Made conformant to the GNU coding standards January, 1995
by Francesco Potorti` <pot@cnuce.cnr.it>. */
#ifdef HAVE_CONFIG_H
#include <config.h>
/* On some systems, Emacs defines static as nothing for the sake
of unexec. We don't want that here since we don't use unexec. */
#undef static
#endif
#include <stdio.h>
#include <time.h>
#include <sys/types.h>
#include <getopt.h>
#ifdef MSDOS
#include <fcntl.h>
#endif
#undef TRUE
#define TRUE 1
#undef FALSE
#define FALSE 0
#define streq(s,t) (strcmp (s, t) == 0)
#define strneq(s,t,n) (strncmp (s, t, n) == 0)
typedef int logical;
/*
* A `struct linebuffer' is a structure which holds a line of text.
* `readline' reads a line from a stream into a linebuffer and works
* regardless of the length of the line.
*/
struct linebuffer
{
long size;
char *buffer;
};
extern char *strtok();
long *xmalloc (), *xrealloc ();
char *concat ();
long readline ();
void fatal ();
/*
* xnew -- allocate storage. SYNOPSIS: Type *xnew (int n, Type);
*/
#define xnew(n, Type) ((Type *) xmalloc ((n) * sizeof (Type)))
char *progname;
struct option longopts[] =
{
{ "help", no_argument, NULL, 'h' },
{ "version", no_argument, NULL, 'V' },
{ 0 }
};
extern int optind;
int
main (argc, argv)
int argc;
char **argv;
{
logical labels_saved, printing, header;
time_t ltoday;
char *labels, *p, *today;
struct linebuffer data;
#ifdef MSDOS
_fmode = O_BINARY; /* all of files are treated as binary files */
#if __DJGPP__ > 1
if (!isatty (fileno (stdout)))
setmode (fileno (stdout), O_BINARY);
if (!isatty (fileno (stdin)))
setmode (fileno (stdin), O_BINARY);
#else /* not __DJGPP__ > 1 */
(stdout)->_flag &= ~_IOTEXT;
(stdin)->_flag &= ~_IOTEXT;
#endif /* not __DJGPP__ > 1 */
#endif
progname = argv[0];
while (1)
{
int opt = getopt_long (argc, argv, "hV", longopts, 0);
if (opt == EOF)
break;
switch (opt)
{
case 'V':
printf ("%s (GNU Emacs %s)\n", "b2m", VERSION);
puts ("b2m is in the public domain.");
exit (EXIT_SUCCESS);
case 'h':
fprintf (stderr, "Usage: %s <babylmailbox >unixmailbox\n", progname);
exit (EXIT_SUCCESS);
}
}
if (optind != argc)
{
fprintf (stderr, "Usage: %s <babylmailbox >unixmailbox\n", progname);
exit (EXIT_SUCCESS);
}
labels_saved = printing = header = FALSE;
ltoday = time (0);
today = ctime (&ltoday);
data.size = 200;
data.buffer = xnew (200, char);
if (readline (&data, stdin) == 0
|| !strneq (data.buffer, "BABYL OPTIONS:", 14))
fatal ("standard input is not a Babyl mailfile.");
while (readline (&data, stdin) > 0)
{
if (streq (data.buffer, "*** EOOH ***") && !printing)
{
printing = header = TRUE;
printf ("From \"Babyl to mail by %s\" %s", progname, today);
continue;
}
if (data.buffer[0] == '\037')
{
if (data.buffer[1] == '\0')
continue;
else if (data.buffer[1] == '\f')
{
/* Save labels. */
readline (&data, stdin);
p = strtok (data.buffer, " ,\r\n\t");
labels = "X-Babyl-Labels: ";
while ((p = strtok (NULL, " ,\r\n\t")))
labels = concat (labels, p, ", ");
p = &labels[strlen (labels) - 2];
if (*p == ',')
*p = '\0';
printing = header = FALSE;
labels_saved = TRUE;
continue;
}
}
if ((data.buffer[0] == '\0') && header)
{
header = FALSE;
if (labels_saved)
puts (labels);
}
if (printing)
puts (data.buffer);
}
return EXIT_SUCCESS;
}
/*
* Return a newly-allocated string whose contents
* concatenate those of s1, s2, s3.
*/
char *
concat (s1, s2, s3)
char *s1, *s2, *s3;
{
int len1 = strlen (s1), len2 = strlen (s2), len3 = strlen (s3);
char *result = xnew (len1 + len2 + len3 + 1, char);
strcpy (result, s1);
strcpy (result + len1, s2);
strcpy (result + len1 + len2, s3);
result[len1 + len2 + len3] = '\0';
return result;
}
/*
* Read a line of text from `stream' into `linebuffer'.
* Return the number of characters read from `stream',
* which is the length of the line including the newline, if any.
*/
long
readline (linebuffer, stream)
struct linebuffer *linebuffer;
register FILE *stream;
{
char *buffer = linebuffer->buffer;
register char *p = linebuffer->buffer;
register char *pend;
int chars_deleted;
pend = p + linebuffer->size; /* Separate to avoid 386/IX compiler bug. */
while (1)
{
register int c = getc (stream);
if (p == pend)
{
linebuffer->size *= 2;
buffer = (char *) xrealloc (buffer, linebuffer->size);
p += buffer - linebuffer->buffer;
pend = buffer + linebuffer->size;
linebuffer->buffer = buffer;
}
if (c == EOF)
{
*p = '\0';
chars_deleted = 0;
break;
}
if (c == '\n')
{
if (p > buffer && p[-1] == '\r')
{
*--p = '\0';
chars_deleted = 2;
}
else
{
*p = '\0';
chars_deleted = 1;
}
break;
}
*p++ = c;
}
return (p - buffer + chars_deleted);
}
/*
* Like malloc but get fatal error if memory is exhausted.
*/
long *
xmalloc (size)
unsigned int size;
{
long *result = (long *) malloc (size);
if (result == NULL)
fatal ("virtual memory exhausted");
return result;
}
long *
xrealloc (ptr, size)
char *ptr;
unsigned int size;
{
long *result = (long *) realloc (ptr, size);
if (result == NULL)
fatal ("virtual memory exhausted");
return result;
}
void
fatal (message)
char *message;
{
fprintf (stderr, "%s: %s\n", progname, message);
exit (EXIT_FAILURE);
}
/* arch-tag: 5a3ad2af-a802-408f-83cc-e7cf5e98653e
(do not change this comment) */
/* b2m.c ends here */