trunk/Src/wptFileCBS.cpp

/* wptFileCBS.cpp
 *      Copyright (C) 2001-2005 Timo Schulz
 *      Copyright (C) 2005 g10 Code GmbH
 *
 * This file is part of WinPT.
 *
 * WinPT 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 
 * of the License, or (at your option) any later version.
 *  
 * WinPT 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 WinPT; if not, write to the Free Software Foundation, 
 * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 
 */
#include <windows.h>
#include <stdio.h>
#include <malloc.h>
#include <errno.h>
#include <stdlib.h>

#include "wptListView.h"
#include "wptGPG.h"
#include "w32gpgme.h"
#include "wptFileManager.h"

/* Predefined read callback. */
static long
read_cb (void *handle, void *buffer, size_t size)
{
    file_data_t cb = (file_data_t)handle;
    return fread (buffer, 1, size, cb->handle);
}


/* Predefined write callback. */
static long
write_cb (void *handle, const void *buffer, size_t size)
{
    file_data_t cb = (file_data_t)handle;
    return fwrite (buffer, 1, size, cb->handle);
}


/* Create a new data -> file association with a static callback.
   @fname is the file which is associated to the object.
   @r_cb is the context which holds all information.
   @for_read is 1 if the file is opened for read only.
   Return value: 0 on success. */
gpgme_error_t
gpg_file_data_new (const char *fname, int for_read, file_data_t *r_cb)
                      
{
    gpgme_error_t err;
    file_data_t cb;
    FILE *f;

    f = fopen (fname, for_read?"rb" : "wb");
    if (!f)
        return gpgme_err_code_from_errno (errno);

    cb = (file_data_t)calloc (1, sizeof *cb);
    if (!cb)
        abort ();
    cb->cbs.read = read_cb;
    cb->cbs.write = write_cb;
    cb->handle = f;

    err = gpgme_data_new_from_cbs  (&cb->dat, &cb->cbs, cb);
    if (err) {
        fclose (f);
        free (cb);
        return err;
    }

    *r_cb = cb;
    return err;
}


/* Release the context in @cb. Close all internal handles if possible. */
void
gpg_file_data_release (file_data_t cb)
{
    if (!cb)
        return;
    if (cb->handle) {
        FILE *f = (FILE *)cb->handle;
        fclose (f);
    }
    if (cb->dat)
        gpgme_data_release (cb->dat);
    free (cb);
}
1	/* wptFileCBS.cpp
2	* Copyright (C) 2001-2005 Timo Schulz
3	* Copyright (C) 2005 g10 Code GmbH
4	*
5	* This file is part of WinPT.
6	*
7	* WinPT is free software; you can redistribute it and/or
8	* modify it under the terms of the GNU General Public License
9	* as published by the Free Software Foundation; either version 2
10	* of the License, or (at your option) any later version.
11	*
12	* WinPT is distributed in the hope that it will be useful,
13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15	* General Public License for more details.
16	*
17	* You should have received a copy of the GNU General Public License
18	* along with WinPT; if not, write to the Free Software Foundation,
19	* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20	*/
21	#include <windows.h>
22	#include <stdio.h>
23	#include <malloc.h>
24	#include <errno.h>
25	#include <stdlib.h>
26
27	#include "wptListView.h"
28	#include "wptGPG.h"
29	#include "w32gpgme.h"
30	#include "wptFileManager.h"
31
32	/* Predefined read callback. */
33	static long
34	read_cb (void handle, void buffer, size_t size)
35	{
36	file_data_t cb = (file_data_t)handle;
37	return fread (buffer, 1, size, cb->handle);
38	}
39
40
41	/* Predefined write callback. */
42	static long
43	write_cb (void handle, const void buffer, size_t size)
44	{
45	file_data_t cb = (file_data_t)handle;
46	return fwrite (buffer, 1, size, cb->handle);
47	}
48
49
50	/* Create a new data -> file association with a static callback.
51	@fname is the file which is associated to the object.
52	@r_cb is the context which holds all information.
53	@for_read is 1 if the file is opened for read only.
54	Return value: 0 on success. */
55	gpgme_error_t
56	gpg_file_data_new (const char fname, int for_read, file_data_t r_cb)
57
58	{
59	gpgme_error_t err;
60	file_data_t cb;
61	FILE *f;
62
63	f = fopen (fname, for_read?"rb" : "wb");
64	if (!f)
65	return gpgme_err_code_from_errno (errno);
66
67	cb = (file_data_t)calloc (1, sizeof *cb);
68	if (!cb)
69	abort ();
70	cb->cbs.read = read_cb;
71	cb->cbs.write = write_cb;
72	cb->handle = f;
73
74	err = gpgme_data_new_from_cbs (&cb->dat, &cb->cbs, cb);
75	if (err) {
76	fclose (f);
77	free (cb);
78	return err;
79	}
80
81	*r_cb = cb;
82	return err;
83	}
84
85
86	/* Release the context in @cb. Close all internal handles if possible. */
87	void
88	gpg_file_data_release (file_data_t cb)
89	{
90	if (!cb)
91	return;
92	if (cb->handle) {
93	FILE f = (FILE )cb->handle;
94	fclose (f);
95	}
96	if (cb->dat)
97	gpgme_data_release (cb->dat);
98	free (cb);
99	}