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