body.c
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/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 1999, 2000, 2001, 2004, 2005 Free Software Foundation, Inc.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General
Public License along with this library; if not, write to the
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301 USA */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <mailutils/stream.h>
#include <mailutils/mutil.h>
#include <mailutils/errno.h>
#include <body0.h>
#define BODY_MODIFIED 0x10000
static int _body_flush (stream_t);
static int _body_get_transport2 (stream_t, mu_transport_t *, mu_transport_t *);
static int _body_read (stream_t, char *, size_t, off_t, size_t *);
static int _body_readline (stream_t, char *, size_t, off_t, size_t *);
static int _body_truncate (stream_t, off_t);
static int _body_size (stream_t, off_t *);
static int _body_write (stream_t, const char *, size_t, off_t, size_t *);
/* Our own defaults for the body. */
static int _body_get_size (body_t, size_t *);
static int _body_get_lines (body_t, size_t *);
static int _body_get_size0 (stream_t, size_t *);
static int _body_get_lines0 (stream_t, size_t *);
int
mu_body_create (body_t *pbody, void *owner)
{
body_t body;
if (pbody == NULL)
return MU_ERR_OUT_PTR_NULL;
if (owner == NULL)
return EINVAL;
body = calloc (1, sizeof (*body));
if (body == NULL)
return ENOMEM;
body->owner = owner;
*pbody = body;
return 0;
}
void
mu_body_destroy (body_t *pbody, void *owner)
{
if (pbody && *pbody)
{
body_t body = *pbody;
if (body->owner == owner)
{
if (body->filename)
{
/* FIXME: should we do this? */
remove (body->filename);
free (body->filename);
}
if (body->stream)
stream_destroy (&(body->stream), body);
if (body->fstream)
{
stream_close (body->fstream);
stream_destroy (&(body->fstream), NULL);
}
free (body);
}
*pbody = NULL;
}
}
void *
mu_body_get_owner (body_t body)
{
return (body) ? body->owner : NULL;
}
/* FIXME: not implemented. */
int
mu_body_is_modified (body_t body)
{
return (body) ? (body->flags & BODY_MODIFIED) : 0;
}
/* FIXME: not implemented. */
int
mu_body_clear_modified (body_t body)
{
if (body)
body->flags &= ~BODY_MODIFIED;
return 0;
}
int
mu_body_get_filename (body_t body, char *filename, size_t len, size_t *pn)
{
int n = 0;
if (body == NULL)
return EINVAL;
if (body->filename)
{
n = strlen (body->filename);
if (filename && len > 0)
{
len--; /* Space for the null. */
strncpy (filename, body->filename, len)[len] = '\0';
}
}
if (pn)
*pn = n;
return 0;
}
int
mu_body_get_stream (body_t body, stream_t *pstream)
{
if (body == NULL)
return EINVAL;
if (pstream == NULL)
return MU_ERR_OUT_PTR_NULL;
if (body->stream == NULL)
{
int status = stream_create (&body->stream, MU_STREAM_RDWR, body);
if (status != 0)
return status;
/* Create the temporary file. */
body->filename = mu_tempname (NULL);
status = file_stream_create (&body->fstream,
body->filename, MU_STREAM_RDWR);
if (status != 0)
return status;
status = stream_open (body->fstream);
if (status != 0)
return status;
stream_set_get_transport2 (body->stream, _body_get_transport2, body);
stream_set_read (body->stream, _body_read, body);
stream_set_readline (body->stream, _body_readline, body);
stream_set_write (body->stream, _body_write, body);
stream_set_truncate (body->stream, _body_truncate, body);
stream_set_size (body->stream, _body_size, body);
stream_set_flush (body->stream, _body_flush, body);
/* Override the defaults. */
body->_lines = _body_get_lines;
body->_size = _body_get_size;
}
*pstream = body->stream;
return 0;
}
int
mu_body_set_stream (body_t body, stream_t stream, void *owner)
{
if (body == NULL)
return EINVAL;
if (body->owner != owner)
return EACCES;
/* make sure we destroy the old one if it is own by the body */
stream_destroy (&(body->stream), body);
body->stream = stream;
body->flags |= BODY_MODIFIED;
return 0;
}
int
mu_body_set_lines (body_t body, int (*_lines) (body_t, size_t *), void *owner)
{
if (body == NULL)
return EINVAL;
if (body->owner != owner)
return EACCES;
body->_lines = _lines;
return 0;
}
int
mu_body_lines (body_t body, size_t *plines)
{
if (body == NULL)
return EINVAL;
if (body->_lines)
return body->_lines (body, plines);
/* Fall on the stream. */
if (body->stream)
return _body_get_lines0 (body->stream, plines);
if (plines)
*plines = 0;
return 0;
}
int
mu_body_size (body_t body, size_t *psize)
{
if (body == NULL)
return EINVAL;
if (body->_size)
return body->_size (body, psize);
/* Fall on the stream. */
if (body->stream)
return _body_get_size0 (body->stream, psize);
if (psize)
*psize = 0;
return 0;
}
int
mu_body_set_size (body_t body, int (*_size)(body_t, size_t*) , void *owner)
{
if (body == NULL)
return EINVAL;
if (body->owner != owner)
return EACCES;
body->_size = _size;
return 0;
}
/* Stub function for the body stream. */
static int
_body_get_transport2 (stream_t stream, mu_transport_t *pin, mu_transport_t *pout)
{
body_t body = stream_get_owner (stream);
return stream_get_transport2 (body->fstream, pin, pout);
}
static int
_body_read (stream_t stream, char *buffer, size_t n, off_t off, size_t *pn)
{
body_t body = stream_get_owner (stream);
return stream_read (body->fstream, buffer, n, off, pn);
}
static int
_body_readline (stream_t stream, char *buffer, size_t n, off_t off, size_t *pn)
{
body_t body = stream_get_owner (stream);
return stream_readline (body->fstream, buffer, n, off, pn);
}
static int
_body_write (stream_t stream, const char *buf, size_t n, off_t off, size_t *pn)
{
body_t body = stream_get_owner (stream);
return stream_write (body->fstream, buf, n, off, pn);
}
static int
_body_truncate (stream_t stream, off_t n)
{
body_t body = stream_get_owner (stream);
return stream_truncate (body->fstream, n);
}
static int
_body_size (stream_t stream, off_t *size)
{
body_t body = stream_get_owner (stream);
return stream_size (body->fstream, size);
}
static int
_body_flush (stream_t stream)
{
body_t body = stream_get_owner (stream);
return stream_flush (body->fstream);
}
/* Default function for the body. */
static int
_body_get_lines (body_t body, size_t *plines)
{
return _body_get_lines0 (body->fstream, plines);
}
static int
_body_get_size (body_t body, size_t *psize)
{
return _body_get_size0 (body->fstream, psize);
}
static int
_body_get_size0 (stream_t stream, size_t *psize)
{
off_t off = 0;
int status = stream_size (stream, &off);
if (psize)
*psize = off;
return status;
}
static int
_body_get_lines0 (stream_t stream, size_t *plines)
{
int status = stream_flush (stream);
size_t lines = 0;
if (status == 0)
{
char buf[128];
size_t n = 0;
off_t off = 0;
while ((status = stream_readline (stream, buf, sizeof buf,
off, &n)) == 0 && n > 0)
{
if (buf[n - 1] == '\n')
lines++;
off += n;
}
}
if (plines)
*plines = lines;
return status;
}