VeraCrypt
aboutsummaryrefslogtreecommitdiff
path: root/src/Common/libzip/zip_progress.c
blob: 9b1169428099498ae92c931fb3f43f91eab8d841 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
/*
 zip_progress.c -- progress reporting
 Copyright (C) 2017-2018 Dieter Baron and Thomas Klausner

 This file is part of libzip, a library to manipulate ZIP archives.
 The authors can be contacted at <libzip@nih.at>

 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions
 are met:
 1. Redistributions of source code must retain the above copyright
 notice, this list of conditions and the following disclaimer.
 2. Redistributions in binary form must reproduce the above copyright
 notice, this list of conditions and the following disclaimer in
 the documentation and/or other materials provided with the
 distribution.
 3. The names of the authors may not be used to endorse or promote
 products derived from this software without specific prior
 written permission.

 THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS
 OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
 DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
 GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
 IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */


#include <stdlib.h>


#define _ZIP_COMPILING_DEPRECATED
#include "zipint.h"

struct zip_progress {
    zip_t *za;
    zip_progress_callback callback;
    void (*ud_free)(void *);

    void *ud;

    double precision;

    /* state */
    double last_update; /* last value callback function was called with */

    double start; /* start of sub-progress section */
    double end;   /* end of sub-progress section */
};


void
_zip_progress_end(zip_progress_t *progress) {
    _zip_progress_update(progress, 1.0);
}


void
_zip_progress_free(zip_progress_t *progress) {
    if (progress == NULL) {
	return;
    }

    if (progress->ud_free) {
	progress->ud_free(progress->ud);
    }

    free(progress);
}


zip_progress_t *
_zip_progress_new(zip_t *za, double precision, zip_progress_callback callback, void (*ud_free)(void *), void *ud) {
    zip_progress_t *progress = (zip_progress_t *)malloc(sizeof(*progress));

    if (progress == NULL) {
	zip_error_set(&za->error, ZIP_ER_MEMORY, 0);
	return NULL;
    }

    progress->za = za;
    progress->callback = callback;
    progress->ud_free = ud_free;
    progress->ud = ud;
    progress->precision = precision;

    return progress;
}


void
_zip_progress_start(zip_progress_t *progress) {
    if (progress == NULL) {
	return;
    }

    progress->last_update = 0.0;
    progress->callback(progress->za, 0.0, progress->ud);
}


void
_zip_progress_subrange(zip_progress_t *progress, double start, double end) {
    if (progress == NULL) {
	return;
    }

    progress->start = start;
    progress->end = end;

    _zip_progress_update(progress, 0.0);
}

void
_zip_progress_update(zip_progress_t *progress, double sub_current) {
    double current;

    if (progress == NULL) {
	return;
    }

    current = ZIP_MIN(ZIP_MAX(sub_current, 0.0), 1.0) * (progress->end - progress->start) + progress->start;

    if (current - progress->last_update > progress->precision) {
	progress->callback(progress->za, current, progress->ud);
	progress->last_update = current;
    }
}


ZIP_EXTERN int
zip_register_progress_callback_with_state(zip_t *za, double precision, zip_progress_callback callback, void (*ud_free)(void *), void *ud) {
    zip_progress_t *progress = NULL;

    if (callback != NULL) {
	if ((progress = _zip_progress_new(za, precision, callback, ud_free, ud)) == NULL) {
	    return -1;
	}
    }

    _zip_progress_free(za->progress);
    za->progress = progress;

    return 0;
}


struct legacy_ud {
    zip_progress_callback_t callback;
};


static void
_zip_legacy_progress_callback(zip_t *za, double progress, void *vud) {
    struct legacy_ud *ud = (struct legacy_ud *)vud;

    ud->callback(progress);
}

ZIP_EXTERN void
zip_register_progress_callback(zip_t *za, zip_progress_callback_t progress_callback) {
    struct legacy_ud *ud;

    if (progress_callback == NULL) {
	zip_register_progress_callback_with_state(za, 0, NULL, NULL, NULL);
    }

    if ((ud = (struct legacy_ud *)malloc(sizeof(*ud))) == NULL) {
	return;
    }

    ud->callback = progress_callback;

    if (zip_register_progress_callback_with_state(za, 0.001, _zip_legacy_progress_callback, free, ud) < 0) {
	free(ud);
    }
}