wordwrap.c
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/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 2011-2012, 2014-2017 Free Software Foundation, Inc.
GNU Mailutils 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 3, or (at your option)
any later version.
GNU Mailutils 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 GNU Mailutils. If not, see <http://www.gnu.org/licenses/>. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <mailutils/stream.h>
#include <mailutils/stdstream.h>
#include <mailutils/diag.h>
#include <mailutils/debug.h>
#include <mailutils/errno.h>
static void
usage (FILE *fp)
{
fprintf (fp,
"usage: %s [-r N] [-l [+-]N] FILE [[-l [+-]N] FILE...]\n",
mu_program_name);
fprintf (fp, "\n");
fprintf (fp, " -l N set left margin\n");
fprintf (fp, " -l +N move left margin N chars to the right from the current position\n");
fprintf (fp, " -l -N move left margin N chars to the left from the current position\n");
fprintf (fp, " -r N set right margin\n");
fprintf (fp, " -h, -? display this help\n");
}
int
main (int argc, char **argv)
{
unsigned left = 0, right = 80;
mu_stream_t str;
int i;
mu_set_program_name (argv[0]);
for (i = 1; i < argc; i++)
{
char *arg = argv[i];
if (strncmp (arg, "-l", 2) == 0)
{
if (arg[2] == 0)
{
++i;
left = strtoul (argv[i], NULL, 10);
}
else
{
left = strtoul (argv[i] + 2, NULL, 10);
}
}
else if (strncmp (arg, "-r", 2) == 0)
{
if (arg[2] == 0)
{
++i;
right = strtoul (argv[i], NULL, 10);
}
else
{
right = strtoul (argv[i] + 2, NULL, 10);
}
}
else if (strcmp (arg, "--") == 0)
{
i++;
break;
}
else if (arg[0] == '-')
{
if (arg[1] == 0)
break;
else if ((arg[1] == 'h' || arg[1] == '?') && arg[2] == 0)
{
usage (stdout);
return 0;
}
else
{
fprintf (stderr, "%s: unrecognized argument %s\n",
mu_program_name, arg);
usage (stderr);
return 1;
}
}
else
break;
}
if (i == argc)
{
fprintf (stderr, "%s: no files\n", mu_program_name);
usage (stderr);
return 1;
}
mu_stdstream_setup (MU_STDSTREAM_RESET_NONE);
MU_ASSERT (mu_wordwrap_stream_create (&str, mu_strout, left, right));
for (; i < argc; i++)
{
char *arg = argv[i];
if (strncmp (arg, "-l", 2) == 0)
{
if (arg[2] == 0)
{
++i;
arg = argv[i];
}
else
arg += 2;
if (arg[0] == '+' || arg[0] == '-')
{
int off = strtol (arg, NULL, 10);
MU_ASSERT (mu_stream_ioctl (str, MU_IOCTL_WORDWRAPSTREAM,
MU_IOCTL_WORDWRAP_MOVE_MARGIN,
&off));
}
else
{
left = strtoul (arg, NULL, 10);
MU_ASSERT (mu_stream_ioctl (str, MU_IOCTL_WORDWRAPSTREAM,
MU_IOCTL_WORDWRAP_SET_MARGIN,
&left));
}
}
else if (arg[0] == '-' && arg[1] == 0)
{
MU_ASSERT (mu_stream_copy (str, mu_strin, 0, NULL));
mu_stream_close (mu_strin);
}
else
{
mu_stream_t in;
MU_ASSERT (mu_file_stream_create (&in, arg, MU_STREAM_READ));
MU_ASSERT (mu_stream_copy (str, in, 0, NULL));
mu_stream_destroy (&in);
}
}
mu_stream_destroy (&str);
return 0;
}