trunk/Src/wptFileCBS.cpp

/* wptFileCBS.cpp
 *      Copyright (C) 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 
 */
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <windows.h>
#include <stdio.h>
#include <malloc.h>
#include <errno.h>
#include <stdlib.h>
#include <sys/stat.h>

#include "gpgme.h"
#include "wptListView.h"
#include "wptGPG.h"
#include "wptFileManager.h"
#include "wptErrors.h"
#include "wptTypes.h"

void progress_callback (void *opaque, const char *what, int type, int off, int max);


/* Predefined read callback. */
static long
read_cb (void *handle, void *buffer, size_t size)
{
    file_data_t cb = (file_data_t)handle;
    struct progress_filter_s *pfx = (struct progress_filter_s *)cb->cb_value;
    int n = fread (buffer, 1, size, cb->handle);

    /* XXX: there is a sync problem with the progress dialog. */
    if (pfx)
        progress_callback (pfx, NULL, 0, cb->off, cb->size);
    cb->off += n;
    return n;
}


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

    return n;
}


/* 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;
    if (for_read) {
        struct stat st;
        if (fstat (fileno (f), &st))
            BUG (NULL);
        cb->size = st.st_size;
        cb->off = 0;
    }

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

    *r_cb = cb;
    return err;
}


/* Activate the progress callback for the given object @ctx. */
void
gpg_file_data_set_cb (file_data_t ctx, struct progress_filter_s *pfx)
{
    ctx->cb_value = (void*)pfx;
}


/* 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) 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	#ifdef HAVE_CONFIG_H
22	#include <config.h>
23	#endif
24
25	#include <windows.h>
26	#include <stdio.h>
27	#include <malloc.h>
28	#include <errno.h>
29	#include <stdlib.h>
30	#include <sys/stat.h>
31
32	#include "gpgme.h"
33	#include "wptListView.h"
34	#include "wptGPG.h"
35	#include "wptFileManager.h"
36	#include "wptErrors.h"
37	#include "wptTypes.h"
38
39	void progress_callback (void opaque, const char what, int type, int off, int max);
40
41
42	/* Predefined read callback. */
43	static long
44	read_cb (void handle, void buffer, size_t size)
45	{
46	file_data_t cb = (file_data_t)handle;
47	struct progress_filter_s pfx = (struct progress_filter_s )cb->cb_value;
48	int n = fread (buffer, 1, size, cb->handle);
49
50	/* XXX: there is a sync problem with the progress dialog. */
51	if (pfx)
52	progress_callback (pfx, NULL, 0, cb->off, cb->size);
53	cb->off += n;
54	return n;
55	}
56
57
58	/* Predefined write callback. */
59	static long
60	write_cb (void handle, const void buffer, size_t size)
61	{
62	file_data_t cb = (file_data_t)handle;
63	int n = fwrite (buffer, 1, size, cb->handle);
64
65	return n;
66	}
67
68
69	/* Create a new data -> file association with a static callback.
70	@fname is the file which is associated to the object.
71	@r_cb is the context which holds all information.
72	@for_read is 1 if the file is opened for read only.
73	Return value: 0 on success. */
74	gpgme_error_t
75	gpg_file_data_new (const char fname, int for_read, file_data_t r_cb)
76
77	{
78	gpgme_error_t err;
79	file_data_t cb;
80	FILE *f;
81
82	f = fopen (fname, for_read?"rb" : "wb");
83	if (!f)
84	return gpgme_err_code_from_errno (errno);
85
86	cb = (file_data_t)calloc (1, sizeof *cb);
87	if (!cb)
88	abort ();
89	cb->cbs.read = read_cb;
90	cb->cbs.write = write_cb;
91	cb->handle = f;
92	if (for_read) {
93	struct stat st;
94	if (fstat (fileno (f), &st))
95	BUG (NULL);
96	cb->size = st.st_size;
97	cb->off = 0;
98	}
99
100	err = gpgme_data_new_from_cbs (&cb->dat, &cb->cbs, cb);
101	if (err) {
102	fclose (f);
103	free (cb);
104	return err;
105	}
106
107	*r_cb = cb;
108	return err;
109	}
110
111
112	/* Activate the progress callback for the given object @ctx. */
113	void
114	gpg_file_data_set_cb (file_data_t ctx, struct progress_filter_s *pfx)
115	{
116	ctx->cb_value = (void*)pfx;
117	}
118
119
120	/* Release the context in @cb. Close all internal handles if possible. */
121	void
122	gpg_file_data_release (file_data_t cb)
123	{
124	if (!cb)
125	return;
126	if (cb->handle) {
127	FILE f = (FILE )cb->handle;
128	fclose (f);
129	}
130	if (cb->dat)
131	gpgme_data_release (cb->dat);
132	free (cb);
133	}